Pub Date : 2023-01-09DOI: 10.15588/1607-6885-2022-2-17
V. Ol’shanetskii, I. Zolotarevsky
В роботі [1], на основі аналізу експериментальних даних по впливу сильних магнітних полів на мартенситне γ→α-перетворення, було висловлено припущення, що зародження мартенситної фази може відбуватися в локальних областях γфази з дезорієнтованими атомними магнітними моментами. Це можуть бути магнітні неоднорідності, збагачені атомами основного компонента – заліза, які мають тенденцію до антиферомагнітної взаємодії [2]. Метою даного повідомлення є пошук співвідношення між конкуруючими елементами в бінарній термодинамічній системі Fe-Ni, яка є основою багатьох сталей і спеціальних сплавів. Згідно відомої кривої Бете-Слетера (рис.1) [2–4] в парамагнітній ГЦК-матриці обох елементів відбуваються магнітні фазові переходи другого роду різних типів (точка Нееля TN в γ-залізі та точка Кюрі TK в нікелі). При цьому, перетворення в обох системах відбуваються в малих кластерних зонах типу першої координаційної сфери. З часом в процесі перетворення кількість подібних кластерів збільшується, що приводить до збільшення ентропії в обох металах, а це уповільнює швидкість формування більш стабільного термодинамічного стану. Перебіг та-
{"title":"ON THE PECULIARITIES OF PHASE TRANSITIONS IN THE Fe-Ni THERMODYNAMIC SYSTEM","authors":"V. Ol’shanetskii, I. Zolotarevsky","doi":"10.15588/1607-6885-2022-2-17","DOIUrl":"https://doi.org/10.15588/1607-6885-2022-2-17","url":null,"abstract":"В роботі [1], на основі аналізу експериментальних даних по впливу сильних магнітних полів на мартенситне γ→α-перетворення, було висловлено припущення, що зародження мартенситної фази може відбуватися в локальних областях γфази з дезорієнтованими атомними магнітними моментами. Це можуть бути магнітні неоднорідності, збагачені атомами основного компонента – заліза, які мають тенденцію до антиферомагнітної взаємодії [2]. Метою даного повідомлення є пошук співвідношення між конкуруючими елементами в бінарній термодинамічній системі Fe-Ni, яка є основою багатьох сталей і спеціальних сплавів. Згідно відомої кривої Бете-Слетера (рис.1) [2–4] в парамагнітній ГЦК-матриці обох елементів відбуваються магнітні фазові переходи другого роду різних типів (точка Нееля TN в γ-залізі та точка Кюрі TK в нікелі). При цьому, перетворення в обох системах відбуваються в малих кластерних зонах типу першої координаційної сфери. З часом в процесі перетворення кількість подібних кластерів збільшується, що приводить до збільшення ентропії в обох металах, а це уповільнює швидкість формування більш стабільного термодинамічного стану. Перебіг та-","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131085628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-09DOI: 10.15588/1607-6885-2022-2-4
I. Vakulenko, S. Plitchenko, D. Bolotova, O. Perkov
Purpose. Determination of the conditions for the disappearance of a section of intermittent flow and its effect on the strain hardening of low-carbon steel. Actuality. The use of low carbon steels with intermittent flow for stamping has a significant limitation. Based on this, the issues of the effect of ferrite grain size on the occurrence of intermittent flow are relevant for determining the optimal structural state of steels intended for deep drawing. Research methods. The structure of the samples was studied under a light microscope, the grain size of the ferrite was determined by the methods of quantitative metallography. The mechanical properties of steel were determined in tension at room temperature and a strain rate of 10-3 s-1. The characteristics of the initiation of plastic flow and the parameters of strain hardening were determined from the analysis of tension curves in logarithmic coordinates. In the region of uniform strain hardening, the deformation of the violation of the directly proportional relation lgσ-lgε was determined as the moment of formation of dislocation structures with a certain periodicity. Results. An increase in the grain size of ferrite is accompanied by a decrease in the region of intermittent flow and a shift in the moment of formation of a dislocation cellular structure towards small plastic deformations. The strain hardening rate in the region of uniform work hardening and the Lüders strain are related by an inversely proportional relationship. With excessively large grain sizes of ferrite, the difficulty of maintaining conditions for a uniform distribution of slip lines is one of the reasons for the disappearance of the intermittent flow region on the deformation curves of low-carbon steel. Scientific novelty. With an increase in the grain size of ferrite, the deformation of the beginning of the decay of a uniform distribution of dislocations into periodic structures is shifted to a decrease. At the same time, an increase in the ability of the metal to work hardening during the formation of a deformation band contributes to a decrease in the length of the intermittent flow section. Practical value. Determining the nature of the influence of the grain size of low-carbon steel ferrite on the characteristics of work hardening and the formation of dislocation periodic structures can be useful in determining the optimal structural state of steel for deep drawing.
{"title":"RELATION BETWEEN DISCONTINUOUS PLASTIC FLOW AND STRAIN HARDENING OF THE LOW-CARBON STEEL","authors":"I. Vakulenko, S. Plitchenko, D. Bolotova, O. Perkov","doi":"10.15588/1607-6885-2022-2-4","DOIUrl":"https://doi.org/10.15588/1607-6885-2022-2-4","url":null,"abstract":"Purpose. Determination of the conditions for the disappearance of a section of intermittent flow and its effect on the strain hardening of low-carbon steel. \u0000Actuality. The use of low carbon steels with intermittent flow for stamping has a significant limitation. Based on this, the issues of the effect of ferrite grain size on the occurrence of intermittent flow are relevant for determining the optimal structural state of steels intended for deep drawing. \u0000Research methods. The structure of the samples was studied under a light microscope, the grain size of the ferrite was determined by the methods of quantitative metallography. The mechanical properties of steel were determined in tension at room temperature and a strain rate of 10-3 s-1. The characteristics of the initiation of plastic flow and the parameters of strain hardening were determined from the analysis of tension curves in logarithmic coordinates. In the region of uniform strain hardening, the deformation of the violation of the directly proportional relation lgσ-lgε was determined as the moment of formation of dislocation structures with a certain periodicity. \u0000Results. An increase in the grain size of ferrite is accompanied by a decrease in the region of intermittent flow and a shift in the moment of formation of a dislocation cellular structure towards small plastic deformations. The strain hardening rate in the region of uniform work hardening and the Lüders strain are related by an inversely proportional relationship. With excessively large grain sizes of ferrite, the difficulty of maintaining conditions for a uniform distribution of slip lines is one of the reasons for the disappearance of the intermittent flow region on the deformation curves of low-carbon steel. \u0000Scientific novelty. With an increase in the grain size of ferrite, the deformation of the beginning of the decay of a uniform distribution of dislocations into periodic structures is shifted to a decrease. At the same time, an increase in the ability of the metal to work hardening during the formation of a deformation band contributes to a decrease in the length of the intermittent flow section. \u0000Practical value. Determining the nature of the influence of the grain size of low-carbon steel ferrite on the characteristics of work hardening and the formation of dislocation periodic structures can be useful in determining the optimal structural state of steel for deep drawing.","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126170348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-09DOI: 10.15588/1607-6885-2022-2-9
D. Tоmkin, V. Klochikhin, S. Danylov, О. Pedash, О. Naymyk, V. Naymyk
Purpose. To study the effect of modification of nickel-yttrium ligature with additives on the structure and physical and mechanical properties of ЖС6У-ВІ alloy, smelted using its own technological return in the charge. Research methods. On the УППФ-3М installation with the base crucible, experimental melting of standart technological return of the ЖС6У-ВІ alloy was carried out using high-temperature melt processing. Experimental samples for mechanical tests and determination of stress-rupture strength were cast from the obtained ingots, cut into measured batch blanks and cleaned in a shot blasting drum, using the method of equiaxial crystallization in ceramic molds. When pouring one ceramic mold, the metal melt at a temperature of 1540 °C was modified with a nickel-yttrium ligature of the ІтН1 brand (grain size 2...5 mm) in the amount of 0.136 % of the mass of the charge in a crucible with a holding time of 1 min 15 s ... 1 min. The second block was poured without modification. Cooling of the poured blocks was carried out at the melting site at normal ambient temperature. The samples underwent heat treatment according to ОСТ 1 90126-85: heating to a temperature of 1210 ± 10 °C, holding for 4 hours, cooling in air. The balance of the chemical composition of the experimental alloys was evaluated by the computational and analytical method. The chemical composition of the alloy of experimental variants was determined. The microstructure and mechanical properties at room temperature were studied. Stress-rupture strength tests were performed at 975 °C under a load of 230 MPa. Results. Experimental melting of the charge was carried out, which consisted exclusively of our own technological return of the ЖС6У-ВІ alloy with the use of high-temperature processing of the melt and modification with a nickel-yttrium ligature. The chemical composition, microstructure of the experimental alloy, its mechanical properties at room temperature, and heat resistance indicators were studied. A method of determining the degree of balance of the chemical composition of modern superalloys based on the total content of groups of alloying elements is proposed. Scientific novelty. Calculations carried out in accordance with the proposed method of determining the degree of balance of the chemical composition of the alloy show that for the experimental variants, phase separations may form along the grain boundaries. Studies of the microstructure confirmed the separation of the γ-γ' eutectic phase in the form of a “white” border along the thickened grain boundaries in the metal of the ЖС6У-ВІ alloy sample. According to the calculations of the metal alloying system balance for experimental melts, not only the thickening of the grain boundaries and the separation of the γ-γ' eutectic phase, but also a decrease in mechanical properties and stress-rupture strength can be observed. The application of modification with nickel-yttrium ligature in the amount of 0.136 % in
{"title":"THEINFLUENCE OF MODIFICATION WITH YTTRIUM ON THE STRUCTURE AND PROPERTIES OF CASTINGS OBTAINED FROM THE ЖС6У-ВІ ALLOY RETURN","authors":"D. Tоmkin, V. Klochikhin, S. Danylov, О. Pedash, О. Naymyk, V. Naymyk","doi":"10.15588/1607-6885-2022-2-9","DOIUrl":"https://doi.org/10.15588/1607-6885-2022-2-9","url":null,"abstract":"Purpose. To study the effect of modification of nickel-yttrium ligature with additives on the structure and physical and mechanical properties of ЖС6У-ВІ alloy, smelted using its own technological return in the charge. \u0000Research methods. On the УППФ-3М installation with the base crucible, experimental melting of standart technological return of the ЖС6У-ВІ alloy was carried out using high-temperature melt processing. \u0000Experimental samples for mechanical tests and determination of stress-rupture strength were cast from the obtained ingots, cut into measured batch blanks and cleaned in a shot blasting drum, using the method of equiaxial crystallization in ceramic molds. \u0000When pouring one ceramic mold, the metal melt at a temperature of 1540 °C was modified with a nickel-yttrium ligature of the ІтН1 brand (grain size 2...5 mm) in the amount of 0.136 % of the mass of the charge in a crucible with a holding time of 1 min 15 s ... 1 min. The second block was poured without modification. \u0000Cooling of the poured blocks was carried out at the melting site at normal ambient temperature. \u0000The samples underwent heat treatment according to ОСТ 1 90126-85: heating to a temperature of 1210 ± 10 °C, holding for 4 hours, cooling in air. \u0000The balance of the chemical composition of the experimental alloys was evaluated by the computational and analytical method. \u0000The chemical composition of the alloy of experimental variants was determined. The microstructure and mechanical properties at room temperature were studied. Stress-rupture strength tests were performed at 975 °C under a load of 230 MPa. \u0000Results. Experimental melting of the charge was carried out, which consisted exclusively of our own technological return of the ЖС6У-ВІ alloy with the use of high-temperature processing of the melt and modification with a nickel-yttrium ligature. \u0000The chemical composition, microstructure of the experimental alloy, its mechanical properties at room temperature, and heat resistance indicators were studied. \u0000A method of determining the degree of balance of the chemical composition of modern superalloys based on the total content of groups of alloying elements is proposed. \u0000Scientific novelty. Calculations carried out in accordance with the proposed method of determining the degree of balance of the chemical composition of the alloy show that for the experimental variants, phase separations may form along the grain boundaries. Studies of the microstructure confirmed the separation of the γ-γ' eutectic phase in the form of a “white” border along the thickened grain boundaries in the metal of the ЖС6У-ВІ alloy sample. \u0000According to the calculations of the metal alloying system balance for experimental melts, not only the thickening of the grain boundaries and the separation of the γ-γ' eutectic phase, but also a decrease in mechanical properties and stress-rupture strength can be observed. \u0000The application of modification with nickel-yttrium ligature in the amount of 0.136 % in ","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129216390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-07DOI: 10.15588/1607-6885-2022-2-13
L. Hulyaeva
{"title":"ON THE GOALS OF THE EDUCATIONAL PROCESS IN PHYSICS IN THE CONDITIONS OF TRAINING FUTURE ENGINEERS: A PRACTICAL ASPECT","authors":"L. Hulyaeva","doi":"10.15588/1607-6885-2022-2-13","DOIUrl":"https://doi.org/10.15588/1607-6885-2022-2-13","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116745033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-05DOI: 10.15588/1607-6885-2022-2-5
D. Glushkova, V. Volchuk
Purpose. The goal was to determine the effect of laser heating parameters on the structure and depth of the borated layer, since the properties of piston rings depend on the depth of the latter. Research methods. Microstructural and X- ray phase analyzes were used to determine the structural state of piston rings. Results. Application of traditional boriding methods associated with diffusion of boron into the solid phase leads to formation of the working layer having high brittleness. The conducted studies revealed that the increase in the speed of displacement of the part in the process of laser heating reduces the depth of the borated layer. Such a dependence is observed both at 0.15 mm thickness of coating and at a thickness of 0.30 mm. For all modes of workpiece displacement speed for the used boron containing envelope with the above-specified thickness a higher thickness of the borated layer and the heat affected area corresponds to a higher thickness of coating. Increase of the spot size leads to an increase in the depth of the layer. By X- ray and metallographic diffraction there were decoded the phases and structural constituents of the borated layer. Scientific novelty. An approach to solving the problem of increasing the wear resistance of piston rings without crumbling is shown. The use of laser heating during drilling ensures the formation of a new layer with special properties. However, optimal properties can be achieved only after establishing a relationship between the parameters of the process and the depth of the boron layer. X-ray and metallographic analysis determined the relationship between the rate of irradiation and the proportion of high-boron structures in the layer. It is shown that the borated layer in high-strength cast iron contains such phases as FeB, Fe2B, α- phase, borocementite Fe3(B,C). Practical value. Increased wear resistance of piston ring materials, which often limits the growth of machine productivity and their service life. Research results can be extended to other parts subject to intensive wear.
{"title":"DETERMINATION OF THE OPTIMAL PARAMETERS OF LASER BORIDING TO IMPROVE THE WEAR RESISTANCE OF PISTON RINGS","authors":"D. Glushkova, V. Volchuk","doi":"10.15588/1607-6885-2022-2-5","DOIUrl":"https://doi.org/10.15588/1607-6885-2022-2-5","url":null,"abstract":"Purpose. The goal was to determine the effect of laser heating parameters on the structure and depth of the borated layer, since the properties of piston rings depend on the depth of the latter. \u0000Research methods. Microstructural and X- ray phase analyzes were used to determine the structural state of piston rings. \u0000Results. Application of traditional boriding methods associated with diffusion of boron into the solid phase leads to formation of the working layer having high brittleness. The conducted studies revealed that the increase in the speed of displacement of the part in the process of laser heating reduces the depth of the borated layer. Such a dependence is observed both at 0.15 mm thickness of coating and at a thickness of 0.30 mm. For all modes of workpiece displacement speed for the used boron containing envelope with the above-specified thickness a higher thickness of the borated layer and the heat affected area corresponds to a higher thickness of coating. Increase of the spot size leads to an increase in the depth of the layer. By X- ray and metallographic diffraction there were decoded the phases and structural constituents of the borated layer. \u0000Scientific novelty. An approach to solving the problem of increasing the wear resistance of piston rings without crumbling is shown. The use of laser heating during drilling ensures the formation of a new layer with special properties. However, optimal properties can be achieved only after establishing a relationship between the parameters of the process and the depth of the boron layer. X-ray and metallographic analysis determined the relationship between the rate of irradiation and the proportion of high-boron structures in the layer. It is shown that the borated layer in high-strength cast iron contains such phases as FeB, Fe2B, α- phase, borocementite Fe3(B,C). \u0000Practical value. Increased wear resistance of piston ring materials, which often limits the growth of machine productivity and their service life. Research results can be extended to other parts subject to intensive wear.","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124675213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-05DOI: 10.15588/1607-6885-2022-2-1
V. Ol’shanetskii, O. Glotka, V. Greshta, V. Khvostak
Purpose. It consists in establishing the influence of the chemical composition on the type, chemical composition and morphology of the primary carbides of the nickel-based superalloy, which allows to increase the operational properties of the parts through the structure of the carbide component. Research methods. Process modeling was carried out using the CALPHAD method. The initial data were the chemical compositions of model alloys with different concentrations of carbide-forming elements. The result of the calculation was the chemical composition of the carbides released in the corresponding systems. The experimental values were processed by statistical methods to obtain correlation dependencies of the “parameter-property” type and establish mathematical equations of regression models that optimally describe these dependencies. Results. The regularities of the effect of metal chemical composition on the morphology of carbides of MC type have been established. It is shown that depending on chemical elements introduced in the system, the basis of carbides can change, which causes a change in their shape and an increase in the crack resistance of the material. It is shown that the obtained dependences are closely correlated with metallographic studies of alloys of this class. Scientific novelty. The dependences of the influence of the chemical composition variation of the multicomponent system Ni-Cr-Co-Al-W-Re-Ta-Mo-Nb-C on the chemical composition and morphology of carbides have been established. This makes it possible to change the basis of the carbides, their composition and morphology, thereby improving the mechanical properties of the material, especially fatigue and heat-resistant characteristics. Practical value. An effective solution for establishing the structural-phase state of nickel-based superalloys by optimizing their chemical composition is proposed, which made it possible to improve the operational properties of the material. The established dependencies can be used in the optimization of the composition of industrial cast nickel-based superalloys and in the development of new compositions.
{"title":"IMPROVING THE PROPERTIES OF NICKEL-BASED SUPERALLOYS OF DIRECTED CRYSTALLIZATION BY OPTIMIZING THE CHEMICAL COMPOSITION","authors":"V. Ol’shanetskii, O. Glotka, V. Greshta, V. Khvostak","doi":"10.15588/1607-6885-2022-2-1","DOIUrl":"https://doi.org/10.15588/1607-6885-2022-2-1","url":null,"abstract":"Purpose. It consists in establishing the influence of the chemical composition on the type, chemical composition and morphology of the primary carbides of the nickel-based superalloy, which allows to increase the operational properties of the parts through the structure of the carbide component. \u0000Research methods. Process modeling was carried out using the CALPHAD method. The initial data were the chemical compositions of model alloys with different concentrations of carbide-forming elements. The result of the calculation was the chemical composition of the carbides released in the corresponding systems. The experimental values were processed by statistical methods to obtain correlation dependencies of the “parameter-property” type and establish mathematical equations of regression models that optimally describe these dependencies. \u0000Results. The regularities of the effect of metal chemical composition on the morphology of carbides of MC type have been established. It is shown that depending on chemical elements introduced in the system, the basis of carbides can change, which causes a change in their shape and an increase in the crack resistance of the material. It is shown that the obtained dependences are closely correlated with metallographic studies of alloys of this class. \u0000Scientific novelty. The dependences of the influence of the chemical composition variation of the multicomponent system Ni-Cr-Co-Al-W-Re-Ta-Mo-Nb-C on the chemical composition and morphology of carbides have been established. This makes it possible to change the basis of the carbides, their composition and morphology, thereby improving the mechanical properties of the material, especially fatigue and heat-resistant characteristics. \u0000Practical value. An effective solution for establishing the structural-phase state of nickel-based superalloys by optimizing their chemical composition is proposed, which made it possible to improve the operational properties of the material. The established dependencies can be used in the optimization of the composition of industrial cast nickel-based superalloys and in the development of new compositions. \u0000 ","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128347057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-05DOI: 10.15588/1607-6885-2022-2-6
S. Popov, S. Shumykin, Н. Laptieva, M. Yuzhakov
Purpose. The purpose of this study is to establish technological conditions and parameters for obtaining materials for improving the performance of machine parts under conditions of heavily loaded friction units due to quasi-tribosystems of gas thermal sprayed anti-friction layers. Research methods. Priori data were used in combination with our own scientific developments of the dependences of the influence of the chemical composition of gas thermal sprayed anti-friction layers on the physical and mechanical properties of the surface layer of the material, which is destroyed under tribosystem conditions. Results. On the basis of the theoretical and practical scientific research, a set of relevant knowledge has been obtained, which makes it possible to determine the main criteria requirements for obtaining anti-friction layers and graphically describe the characteristics of the alloy and show the correlations of the parameters with each other. The positive role of aluminum as a soft component of anti-friction pseudoalloys, which is well sprayed by thermal metallization at an affordable cost, has been experimentally confirmed. It has been proven that gas thermal coatings in the form of pseudoalloys, consisting of particles with different physical and mechanical properties of materials, can have up to 2–3 times higher wear resistance compared to single-component coatings from materials included in the composition. Scientific novelty. Theoretical and practical scientific research with the reproduction of system analysis to increase the resistance to destruction under the conditions of quasi-tribosystems of gas thermal sprayed antifriction layers is given. It is shown that in order to ensure a good running in of the contacting surfaces in the friction zone and particles of hard material with high wear resistance and resistance against sticking with the counterbody, anti-friction pseudoalloys of coatings should contain zones of material particles with lower hardness to comply with the Charpy principle. It has been determined that when spraying composite wires for application as a solid component of anti-friction coatings, it is possible to use particles of alloying elements that form intermetallic compounds or phase components of alloys with a high hardness during melting. A comparative analysis showed that two-component coatings deposited with composite wires are characterized by higher hardness and wear resistance under high contact pressures compared to coatings of the same composition deposited with different types of solid wires. Practical value. The obtained results allow, within the framework of technical and technological accuracy, which is necessary in the practical engineering forecasts, to determine the physical and mechanical properties of wear resistant gas thermal sprayed anti-friction layers under conditions of quasi-tribosystems. Thus, in comparison with cast antifriction materials of the same composition, anti-friction layers obtai
{"title":"INCREASING THE WEAR RESISTANCE OF HEAVY LOADED FRICTION UNITS OF ANTI-FRICTION GAS THERMAL COATINGS","authors":"S. Popov, S. Shumykin, Н. Laptieva, M. Yuzhakov","doi":"10.15588/1607-6885-2022-2-6","DOIUrl":"https://doi.org/10.15588/1607-6885-2022-2-6","url":null,"abstract":"Purpose. The purpose of this study is to establish technological conditions and parameters for obtaining materials for improving the performance of machine parts under conditions of heavily loaded friction units due to quasi-tribosystems of gas thermal sprayed anti-friction layers. \u0000Research methods. Priori data were used in combination with our own scientific developments of the dependences of the influence of the chemical composition of gas thermal sprayed anti-friction layers on the physical and mechanical properties of the surface layer of the material, which is destroyed under tribosystem conditions. \u0000Results. On the basis of the theoretical and practical scientific research, a set of relevant knowledge has been obtained, which makes it possible to determine the main criteria requirements for obtaining anti-friction layers and graphically describe the characteristics of the alloy and show the correlations of the parameters with each other. The positive role of aluminum as a soft component of anti-friction pseudoalloys, which is well sprayed by thermal metallization at an affordable cost, has been experimentally confirmed. It has been proven that gas thermal coatings in the form of pseudoalloys, consisting of particles with different physical and mechanical properties of materials, can have up to 2–3 times higher wear resistance compared to single-component coatings from materials included in the composition. \u0000Scientific novelty. Theoretical and practical scientific research with the reproduction of system analysis to increase the resistance to destruction under the conditions of quasi-tribosystems of gas thermal sprayed antifriction layers is given. It is shown that in order to ensure a good running in of the contacting surfaces in the friction zone and particles of hard material with high wear resistance and resistance against sticking with the counterbody, anti-friction pseudoalloys of coatings should contain zones of material particles with lower hardness to comply with the Charpy principle. It has been determined that when spraying composite wires for application as a solid component of anti-friction coatings, it is possible to use particles of alloying elements that form intermetallic compounds or phase components of alloys with a high hardness during melting. A comparative analysis showed that two-component coatings deposited with composite wires are characterized by higher hardness and wear resistance under high contact pressures compared to coatings of the same composition deposited with different types of solid wires. \u0000Practical value. The obtained results allow, within the framework of technical and technological accuracy, which is necessary in the practical engineering forecasts, to determine the physical and mechanical properties of wear resistant gas thermal sprayed anti-friction layers under conditions of quasi-tribosystems. Thus, in comparison with cast antifriction materials of the same composition, anti-friction layers obtai","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128676045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-28DOI: 10.15588/1607-6885-2022-1-6
О. Sydorchuk
Purpose. Obtaining forged die steel (4Х4Н5М4Ф2) with adjustable austenitic transformation during operation, electroslag remelting and installation of optimal modes of heat-deformation treatment (annealing, forging, hardening and tempering). Manufacture of large parts such as wheels of extruders from forged steel brand 4Х4Н5М4Ф2with experimental and industrial tests for hot deformation of copper at operating temperatures below the critical point A1. Methods of research. Metallographic analysis of experimental die steels 4Х4Н5М4Ф2 and Н13 (analog 4Х4Н5М4Ф2). Results. Experimental-industrial tests of 4Х4Н5М4Ф2 forged steel extruder wheels for hot deformation of M1 copper have shown increased stability compared to H13 steel used at one of the Chinese enterprises. Scientific novelty. In the process of partial recrystallization of alloyed structural forged steel 4Х4Н5М4Ф2 a spheroidized carbide component is formed, which leads to improved machining of the workpiece for the manufacture of parts such as extruder wheels. Practical value. The possibility of using steel (4Х4Н5М4Ф2) with adjustable austenitic transformation in operation for a wide range of operating temperatures (below the critical point A1 and above the critical point A3) for hot deformation of copper (up to 630 °C), copper-nickel (900–950 °C) and aluminum alloy (450–500 °C) with increased service life was shown. To facilitate machining by cutting the workpiece in the manufacture of dies from steel 4Х4Н5М4Ф2, it was proposed to conduct a partial recrystallization, namely incomplete annealing at a temperature of 750±20 °C. The studied forged steel 4Х4Н5М4Ф2 is characterized with increased in hardness and strength limit compared to H13 steel, after operation of the wheels of extruders (manufacture of more than 60 tons of copper products).
{"title":"DIE STEEL 4Х4Н5М4Ф2 FOR HOT DEFORMATION OF COPPER","authors":"О. Sydorchuk","doi":"10.15588/1607-6885-2022-1-6","DOIUrl":"https://doi.org/10.15588/1607-6885-2022-1-6","url":null,"abstract":"Purpose. Obtaining forged die steel (4Х4Н5М4Ф2) with adjustable austenitic transformation during operation, electroslag remelting and installation of optimal modes of heat-deformation treatment (annealing, forging, hardening and tempering). Manufacture of large parts such as wheels of extruders from forged steel brand 4Х4Н5М4Ф2with experimental and industrial tests for hot deformation of copper at operating temperatures below the critical point A1. \u0000Methods of research. Metallographic analysis of experimental die steels 4Х4Н5М4Ф2 and Н13 (analog 4Х4Н5М4Ф2). \u0000Results. Experimental-industrial tests of 4Х4Н5М4Ф2 forged steel extruder wheels for hot deformation of M1 copper have shown increased stability compared to H13 steel used at one of the Chinese enterprises. \u0000Scientific novelty. In the process of partial recrystallization of alloyed structural forged steel 4Х4Н5М4Ф2 a spheroidized carbide component is formed, which leads to improved machining of the workpiece for the manufacture of parts such as extruder wheels. \u0000Practical value. The possibility of using steel (4Х4Н5М4Ф2) with adjustable austenitic transformation in operation for a wide range of operating temperatures (below the critical point A1 and above the critical point A3) for hot deformation of copper (up to 630 °C), copper-nickel (900–950 °C) and aluminum alloy (450–500 °C) with increased service life was shown. To facilitate machining by cutting the workpiece in the manufacture of dies from steel 4Х4Н5М4Ф2, it was proposed to conduct a partial recrystallization, namely incomplete annealing at a temperature of 750±20 °C. The studied forged steel 4Х4Н5М4Ф2 is characterized with increased in hardness and strength limit compared to H13 steel, after operation of the wheels of extruders (manufacture of more than 60 tons of copper products).","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127647026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-28DOI: 10.15588/1607-6885-2022-1-13
G. Slyn’ko, N. Yevsyeyeva, M. Kurylov, R. Sukhonos, V. Slyn'ko
{"title":"IMPROVED PERFORMANCE OF THE MEMZ-317 ENGINE WITH THE LPG SYSTEM BY INSTALLING A SPARK IGNITION ADVANCEMENT VARIATOR","authors":"G. Slyn’ko, N. Yevsyeyeva, M. Kurylov, R. Sukhonos, V. Slyn'ko","doi":"10.15588/1607-6885-2022-1-13","DOIUrl":"https://doi.org/10.15588/1607-6885-2022-1-13","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129141024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-28DOI: 10.15588/1607-6885-2022-1-11
V. Ol’shanetskii, O. Glotka, Yu. Kononenko
{"title":"THERMODYNAMIC ASPECTS OF PHASE TRANSFORMATIONS IN BYMETALLIC SYSTEMS","authors":"V. Ol’shanetskii, O. Glotka, Yu. Kononenko","doi":"10.15588/1607-6885-2022-1-11","DOIUrl":"https://doi.org/10.15588/1607-6885-2022-1-11","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"162 Suppl 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116690354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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