Pub Date : 2021-09-14DOI: 10.15588/1607-6885-2021-2-5
L. Malinov, V. Malinov, D. Burova
The relevance. Improving the mechanical properties of steels makes it possible to increase the service life of machine parts, which is an important task in materials science. One of the promising directions in its solution is to obtain in steel a multiphase structure, one of the main components of which is metastable austenite, which undergoes a dynamic deformation martensitic transformation (DDMT) - self-hardening effect under loading (SHL). Methods providing the required structure are isothermal and step quenching. However, at present, when they are carried out for cooling from the austenitizing temperature and holding at the constant temperature used non-environmentally friendly substances: heated oil, molten salts or alkalis. In this regard the actual problem is the exclusion of them from the technological process. The possibility of solving this problem on several steels has shown. Purpose is to show the possibility of increasing the mechanical properties of the studied steels 30ХГСА, 38ХС, 45Г, 40ХН, 10Г12, 60Х18 by using rational modes of an environmentally friendly method of steels quenching (isothermal - for low-alloyed and step - for high-alloyed) due to obtaining in their structure along with other components of metastable residual austenite and the implementation of the SHL effect. Research methods. Samples of the investigated steels after austenitization (in some cases with holding in IСIT) were cooled in water to the temperature of lower bainite formation (isothermal quenching) or stabilization of supercooled austenite to martensitic transformation upon cooling (step quenching), after which they were kept in a furnace and cooled in air to room temperature. Durometric, metallographic and X-ray research methods were used. The tensile properties and impact strength were determined. These properties were compared with those obtained for the studied steels after a typical heat treatment, including quenching in oil and tempering. Results. It is shown that isothermal and step quenching of the investigated steels without the use of non-environmentally friendly substances, carried out according to rational modes, makes it possible to increase the mechanical properties in comparison with their level after the commonly used quenching in oil (fire hazard, the vapors are cancerogenic) and tempering. This is achieved by obtaining a multiphase structure with metastable austenite. Scientific novelty. It is proposed to obtain a multiphase structure with metastable austenite in them to improve the mechanical properties of the studied steels by conducting isothermal and step quenching in an environmentally friendly way without using heated oil, molten salts or alkalis. Practical value. For the studied steels the modes of isothermal and step quenching are determined in an environmentally friendly way, which make it possible to increase the mechanical properties in comparison with the level achieved by quenching and tempering. Wherein in contrast t
{"title":"Increasing of the steels properties by an ecological method of isothermal and step quenching","authors":"L. Malinov, V. Malinov, D. Burova","doi":"10.15588/1607-6885-2021-2-5","DOIUrl":"https://doi.org/10.15588/1607-6885-2021-2-5","url":null,"abstract":"The relevance. Improving the mechanical properties of steels makes it possible to increase the service life of machine parts, which is an important task in materials science. One of the promising directions in its solution is to obtain in steel a multiphase structure, one of the main components of which is metastable austenite, which undergoes a dynamic deformation martensitic transformation (DDMT) - self-hardening effect under loading (SHL). Methods providing the required structure are isothermal and step quenching. However, at present, when they are carried out for cooling from the austenitizing temperature and holding at the constant temperature used non-environmentally friendly substances: heated oil, molten salts or alkalis. In this regard the actual problem is the exclusion of them from the technological process. The possibility of solving this problem on several steels has shown. \u0000Purpose is to show the possibility of increasing the mechanical properties of the studied steels 30ХГСА, 38ХС, 45Г, 40ХН, 10Г12, 60Х18 by using rational modes of an environmentally friendly method of steels quenching (isothermal - for low-alloyed and step - for high-alloyed) due to obtaining in their structure along with other components of metastable residual austenite and the implementation of the SHL effect. \u0000Research methods. Samples of the investigated steels after austenitization (in some cases with holding in IСIT) were cooled in water to the temperature of lower bainite formation (isothermal quenching) or stabilization of supercooled austenite to martensitic transformation upon cooling (step quenching), after which they were kept in a furnace and cooled in air to room temperature. Durometric, metallographic and X-ray research methods were used. The tensile properties and impact strength were determined. These properties were compared with those obtained for the studied steels after a typical heat treatment, including quenching in oil and tempering. \u0000Results. It is shown that isothermal and step quenching of the investigated steels without the use of non-environmentally friendly substances, carried out according to rational modes, makes it possible to increase the mechanical properties in comparison with their level after the commonly used quenching in oil (fire hazard, the vapors are cancerogenic) and tempering. This is achieved by obtaining a multiphase structure with metastable austenite. \u0000Scientific novelty. It is proposed to obtain a multiphase structure with metastable austenite in them to improve the mechanical properties of the studied steels by conducting isothermal and step quenching in an environmentally friendly way without using heated oil, molten salts or alkalis. \u0000Practical value. For the studied steels the modes of isothermal and step quenching are determined in an environmentally friendly way, which make it possible to increase the mechanical properties in comparison with the level achieved by quenching and tempering. Wherein in contrast t","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126835859","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 : 2020-02-20DOI: 10.15588/1607-6885-2019-2-14
A. Ershov, E. Zelenina
{"title":"Calculation of the stressed state of plasma coating and substrates by excentral compression method","authors":"A. Ershov, E. Zelenina","doi":"10.15588/1607-6885-2019-2-14","DOIUrl":"https://doi.org/10.15588/1607-6885-2019-2-14","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128416158","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 : 2020-02-20DOI: 10.15588/1607-6885-2019-2-6
S. Ulanov, A. Kachan
{"title":"Increasing fatigue life of gte compressor disks made of titanium alloys by discs treatment in fluidized abrasive layer","authors":"S. Ulanov, A. Kachan","doi":"10.15588/1607-6885-2019-2-6","DOIUrl":"https://doi.org/10.15588/1607-6885-2019-2-6","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"48 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128527244","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 : 2020-02-20DOI: 10.15588/1607-6885-2019-2-17
L. Malinov, D. Burova
{"title":"Mechanical properties of steel 30HГСА after isothermal hardening from the intercritical temperature interval by a new method","authors":"L. Malinov, D. Burova","doi":"10.15588/1607-6885-2019-2-17","DOIUrl":"https://doi.org/10.15588/1607-6885-2019-2-17","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"15 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125623310","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 : 2020-02-20DOI: 10.15588/1607-6885-2019-2-13
K. Niziaiev, V. Khotiun
Purpose of work . Determination of the gas-dynamic parameters of the injection of powdered reagents to provide high-performance operation of devices for powder ferroalloys injection deep into the metal in a teeming ladle. Research methods. An analytical review of literary sources has been carried out, the results of which have arguably confirmed the advantage of the powder reagents injection into the ladle in comparison with traditional deoxidation and alloying technologies. Based on well-known mathematical models adapted to specific technologi-cal conditions, mathematical modeling has been carried out, which takes into account a number of parameters important for the technology, in particular, the degree of powder assimilation and the carrying capacity of the carrier gas. Results. Based on the results of mathematical modeling, the rational modes of powdered ferromanganese injection into the teeming ladle and the size of its fraction, which provides both a high assimilation degree of powder particles by a liquid metal melt and prevents the deposition of powder particles on the walls of the pipeline have been determined by mathematical modeling. Scientific novelty. Based on the results of mathematical modeling, the peculiarities of the interaction of a gas suspension jet with liquid metal melts have been specified. Practical value. The gas-dynamic parameters of the process of of powdered ferroalloys are determined, which provide high performance of the deoxidation and alloying of steel in the teeming ladle, reliable operation of lances and nozzles for powders injection deep into the metal and interaction of particles with metal, necessary from the point of view of deoxidation kinetics.
{"title":"Determination of process parameters for the injection of deoxidizing agents in a teeming ladle","authors":"K. Niziaiev, V. Khotiun","doi":"10.15588/1607-6885-2019-2-13","DOIUrl":"https://doi.org/10.15588/1607-6885-2019-2-13","url":null,"abstract":"Purpose of work . Determination of the gas-dynamic parameters of the injection of powdered reagents to provide high-performance operation of devices for powder ferroalloys injection deep into the metal in a teeming ladle. Research methods. An analytical review of literary sources has been carried out, the results of which have arguably confirmed the advantage of the powder reagents injection into the ladle in comparison with traditional deoxidation and alloying technologies. Based on well-known mathematical models adapted to specific technologi-cal conditions, mathematical modeling has been carried out, which takes into account a number of parameters important for the technology, in particular, the degree of powder assimilation and the carrying capacity of the carrier gas. Results. Based on the results of mathematical modeling, the rational modes of powdered ferromanganese injection into the teeming ladle and the size of its fraction, which provides both a high assimilation degree of powder particles by a liquid metal melt and prevents the deposition of powder particles on the walls of the pipeline have been determined by mathematical modeling. Scientific novelty. Based on the results of mathematical modeling, the peculiarities of the interaction of a gas suspension jet with liquid metal melts have been specified. Practical value. The gas-dynamic parameters of the process of of powdered ferroalloys are determined, which provide high performance of the deoxidation and alloying of steel in the teeming ladle, reliable operation of lances and nozzles for powders injection deep into the metal and interaction of particles with metal, necessary from the point of view of deoxidation kinetics.","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134244228","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 : 2020-02-20DOI: 10.15588/1607-6885-2019-2-7
V. Lebedev, O. Dubovyi, S. Loi
{"title":"Research and estimation of thermal-cycle firmness of plasma spraying more compact coverages are for knots of gas-turbine","authors":"V. Lebedev, O. Dubovyi, S. Loi","doi":"10.15588/1607-6885-2019-2-7","DOIUrl":"https://doi.org/10.15588/1607-6885-2019-2-7","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"417 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116138611","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 : 2020-02-20DOI: 10.15588/1607-6885-2019-2-18
V. Olshanetskii, G. Snizhnoi
{"title":"Magnetic ordering of cluster zones in austenitic steels upon a change in their composition or deformation action","authors":"V. Olshanetskii, G. Snizhnoi","doi":"10.15588/1607-6885-2019-2-18","DOIUrl":"https://doi.org/10.15588/1607-6885-2019-2-18","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124062506","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 : 2020-02-20DOI: 10.15588/1607-6885-2019-2-5
S. Kondrashova, Y. Saprykin, V. Naumyk
{"title":"The effect of the saturating mixture composition on the structure and properties formation of the diffusion titanium layer on gray cast iron","authors":"S. Kondrashova, Y. Saprykin, V. Naumyk","doi":"10.15588/1607-6885-2019-2-5","DOIUrl":"https://doi.org/10.15588/1607-6885-2019-2-5","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133972605","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 : 2020-02-20DOI: 10.15588/1607-6885-2019-2-2
V. Grabovsky, D. Shilo
{"title":"Efficiency of stepwise aging of an alloy with intermetalide-carbide hardening for tools for hot deformation of metals","authors":"V. Grabovsky, D. Shilo","doi":"10.15588/1607-6885-2019-2-2","DOIUrl":"https://doi.org/10.15588/1607-6885-2019-2-2","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126748897","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 : 2020-02-20DOI: 10.15588/1607-6885-2019-2-12
S. Popov, V. Netrebko
{"title":"Structural-logical synthesis andmathematical optimization of physical-mechanical parameters atwearing the materials in low temperatures","authors":"S. Popov, V. Netrebko","doi":"10.15588/1607-6885-2019-2-12","DOIUrl":"https://doi.org/10.15588/1607-6885-2019-2-12","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116720875","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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