Pub Date : 2021-03-01DOI: 10.15407/PLIT2021.01.003
A. Narivskyi, A. S. Zatulovskyi, O. M. Fixssen, V. Shcheretskyi, O. A. Karanda, M. S. Horiuk
The paper considers variants of realization of the complex magnetic-dynamic-vibration in-fluence on metallic melts and hardening of cast aluminum alloys Al7Si, Al7Si, Al12Si2Cu1Mg1Ni for production of cast composite materials strengthened with different types of particles. Their efficiency of four technologies was tested for particles introduction into the melt, and assessment of the technologies has been made prospects for usage depending on the mode of processing, the type of reinforcing particles, and the aluminum matrix alloy. The ad-vantages and disadvantages of each method of particle introduction are highlighted and recom-mendations for their usage are formulated. By the methods of metallography and tribological studies were evaluated the uniformity of distribution of reinforcing particles in the metal matrix, the presence of interfacial zone and defects of wetting particles by aluminum melt, the reinforc-ing effect on tribological properties of samples and their contribution to friction surfaces and third body formation. There were shown the reduction of wear of composite materials in comparison with Al7Si alloy in 1,3 - 1,4 times at approximately identical coefficient of friction. Increasing the duration of electromagnetic treatment with vibration increases the wear resistance of the composite mate-rials. There shown advantages of the technology, where high-modulus amplifier particles (160 - 200) μm are introduced in the form of a composite ligature, the technology can be used for the production of parts for tribological purposes. The optimal mode of complex processing is deter-mined by induction of alternating magnetic field of MHD processing 0.07 - 0.09 T; vibration am-plitude 0.4 - 0.5 mm, frequency 100 Hz; processing time not less than 6 minutes was stated. How-ever, with this technology, the size of the hardener can not be less than 100 μm, which can in-crease the mechanical properties due to the effect of modifying the cast microstructure of the aluminum matrix of composite castings. In order to obtain composite materials with high struc-tural properties, it is additionally necessary to apply high-energy influence that can effectively grind the hardener directly in the melt without its oxidation or degradation, for example by the action of plasma on the melt.
{"title":"The Efficiency of Electromagnetic Treatment for the Production of Heterogeneous Endogenous and Exogenous Aluminum Composites","authors":"A. Narivskyi, A. S. Zatulovskyi, O. M. Fixssen, V. Shcheretskyi, O. A. Karanda, M. S. Horiuk","doi":"10.15407/PLIT2021.01.003","DOIUrl":"https://doi.org/10.15407/PLIT2021.01.003","url":null,"abstract":"The paper considers variants of realization of the complex magnetic-dynamic-vibration in-fluence on metallic melts and hardening of cast aluminum alloys Al7Si, Al7Si, Al12Si2Cu1Mg1Ni for production of cast composite materials strengthened with different types of particles. Their efficiency of four technologies was tested for particles introduction into the melt, and assessment of the technologies has been made prospects for usage depending on the mode of processing, the type of reinforcing particles, and the aluminum matrix alloy. The ad-vantages and disadvantages of each method of particle introduction are highlighted and recom-mendations for their usage are formulated. By the methods of metallography and tribological studies were evaluated the uniformity of distribution of reinforcing particles in the metal matrix, the presence of interfacial zone and defects of wetting particles by aluminum melt, the reinforc-ing effect on tribological properties of samples and their contribution to friction surfaces and third body formation. There were shown the reduction of wear of composite materials in comparison with Al7Si alloy in 1,3 - 1,4 times at approximately identical coefficient of friction. Increasing the duration of electromagnetic treatment with vibration increases the wear resistance of the composite mate-rials. There shown advantages of the technology, where high-modulus amplifier particles (160 - 200) μm are introduced in the form of a composite ligature, the technology can be used for the production of parts for tribological purposes. The optimal mode of complex processing is deter-mined by induction of alternating magnetic field of MHD processing 0.07 - 0.09 T; vibration am-plitude 0.4 - 0.5 mm, frequency 100 Hz; processing time not less than 6 minutes was stated. How-ever, with this technology, the size of the hardener can not be less than 100 μm, which can in-crease the mechanical properties due to the effect of modifying the cast microstructure of the aluminum matrix of composite castings. In order to obtain composite materials with high struc-tural properties, it is additionally necessary to apply high-energy influence that can effectively grind the hardener directly in the melt without its oxidation or degradation, for example by the action of plasma on the melt.","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47071780","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 : 2021-03-01DOI: 10.15407/PLIT2021.01.050
A. Narivskyi, M. Voron, M. Pruss, V. Perekhoda, O. Chistyakov
The work is devoted to monitoring and studying the principles of obtaining creep-resistant Al-based alloys. It is shown that aluminum alloys are constantly expanding their application fields. At the same time, the requirements for a number of aluminum alloys are also growing, which determines their wider use in extreme conditions and, in particular, at elevated temperatures. Examples of parts and details, made of such materials, are used in car engines and special equipment, turbine impellers, parts of heat exchangers and collectors, fittings, cladding elements, and casing parts for aviation and space purposes, etc. Development and production of new creep-resistant materials on the basis of aluminum with the increased level of operational characteristics demands detailed studying of mechanisms and ways maintenance of their optimum structural-phase conditions and finding of effective ways to produce them. The presented work considers the existing methods and principles of efficient creep-resistant aluminum alloys production, among which the greatest attention is paid to the principles of production of cast alloys, as the most profitable in terms of mass production and economic efficiency. It was shown that the main principles of achieving this goal include: the use of alloying elements (Cr, Mn, Fe, Co, Ni, Cu) and modifiers (Ti, Zr, Mo, Hf), which will promote the formation of stable insoluble phases with low diffusion activity and noticeable cubic or close to cubic morphology in a metal matrix of the alloy; Creation of eutectic alloys, including silicon-free compositions, which would consist a large proportion of high-temperature phases with favorable morphology; The temperature of the eutectic transformation should be as high as possible; Introduction of technological principles of melts casting and preparation, that are able to effectively grind the structure of the alloy and increase the solubility of insoluble components by creating specific thermodynamic conditions.
{"title":"Principles of Creep-Resistant Aluminum Alloys Development","authors":"A. Narivskyi, M. Voron, M. Pruss, V. Perekhoda, O. Chistyakov","doi":"10.15407/PLIT2021.01.050","DOIUrl":"https://doi.org/10.15407/PLIT2021.01.050","url":null,"abstract":"The work is devoted to monitoring and studying the principles of obtaining creep-resistant Al-based alloys. It is shown that aluminum alloys are constantly expanding their application fields. At the same time, the requirements for a number of aluminum alloys are also growing, which determines their wider use in extreme conditions and, in particular, at elevated temperatures. Examples of parts and details, made of such materials, are used in car engines and special equipment, turbine impellers, parts of heat exchangers and collectors, fittings, cladding elements, and casing parts for aviation and space purposes, etc. Development and production of new creep-resistant materials on the basis of aluminum with the increased level of operational characteristics demands detailed studying of mechanisms and ways maintenance of their optimum structural-phase conditions and finding of effective ways to produce them. The presented work considers the existing methods and principles of efficient creep-resistant aluminum alloys production, among which the greatest attention is paid to the principles of production of cast alloys, as the most profitable in terms of mass production and economic efficiency. It was shown that the main principles of achieving this goal include: the use of alloying elements (Cr, Mn, Fe, Co, Ni, Cu) and modifiers (Ti, Zr, Mo, Hf), which will promote the formation of stable insoluble phases with low diffusion activity and noticeable cubic or close to cubic morphology in a metal matrix of the alloy; Creation of eutectic alloys, including silicon-free compositions, which would consist a large proportion of high-temperature phases with favorable morphology; The temperature of the eutectic transformation should be as high as possible; Introduction of technological principles of melts casting and preparation, that are able to effectively grind the structure of the alloy and increase the solubility of insoluble components by creating specific thermodynamic conditions.","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41764413","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 : 2020-12-01DOI: 10.15407/plit2020.04.042
V. Doroshenko, V. Kravchenko
elements; some data about the tests of the object, for example, the readings of the sensors, by which the calculated data can be confirmed. Thus, the DT allows in virtual space to simulate the change in the state and characteristics of the entire product when the characteristics of any of its elements or technological operations of its production change. The systems of remote monitoring of the technological process parameters for the central hall of the casting shop according to the LFC process are considered, as well as methods for their rational solution on the theoretical basis of modern applied mathematics.
{"title":"Prereguisites for Creating a Digital Twin of the Technological LFC-Process, According to the Monitoring of the Foundry","authors":"V. Doroshenko, V. Kravchenko","doi":"10.15407/plit2020.04.042","DOIUrl":"https://doi.org/10.15407/plit2020.04.042","url":null,"abstract":"elements; some data about the tests of the object, for example, the readings of the sensors, by which the calculated data can be confirmed. Thus, the DT allows in virtual space to simulate the change in the state and characteristics of the entire product when the characteristics of any of its elements or technological operations of its production change. The systems of remote monitoring of the technological process parameters for the central hall of the casting shop according to the LFC process are considered, as well as methods for their rational solution on the theoretical basis of modern applied mathematics.","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46190292","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 : 2020-06-01DOI: 10.15407/plit2020.02.015
A. Verzilov, A. Semenko, Yu.Yu. Kulish, D. I. Goyda, A. Verzilova, D. Vasiliev
Вивчено проблематику оптимізації параметрів лиття при розливанні сортової заготовки високої якості безперервнолитим способом. Проведено дослідження впливу внутрішнього діаметра та глибини розташування зануреного стакана у кристалізаторі радіальної сортової (МБЛЗ). В основу досліджень взято конструкцію проточного зануреного стакана в умовах роботи кристалізатора сортової МБЛЗ ПАТ «Дніпровський металургійний комбінат», глибина розташування зануреного стакана в діапазоні від 60 до 180 з кроком 20 мм, діаметри порожнини зануреного стакана – 28, 32, 36 мм. В результаті досліджень встановлено, що використання зануреного стакана з внутрішнім діаметром 28 мм можливо в тому випадку, якщо глибина його занурення знаходиться в діапазоні від 80 до 100 мм. Варіювання глибини заглиблення в цій межі істотно не змінює характер розподілу потоків. Струмінь носить чітко сформований спрямований характер і знаходиться на достатній відстані від стінок кристалізатора. Використання зануреного стакана з внутрішнім діаметром 36 мм ускладнено в зв'язку з тим, що струмінь на всіх глибинах занурення стакана носить несформований характер і притискається до більшого радіусу. Внаслідок чого можливе підмивання затверділої коринки металу і існує ймовірність утворення проривів. Однак, виявлено глибину занурення стакану 100 мм, яка задовольняє вимогам, необхідним для отримання сортової заготовки високої якості. Конвективний потік виходить з зануреного стакана, проникає в рідку фазу на допустиму величину, а швидкості під дзеркалом металу не створюють умов для розвитку процесів хвилета вихроутворення і захоплення ШУС. Застосування зануреного стакана з внутрішнім діаметром 32 мм є найбільш виправданим. При його використанні можлива зміна глибини в найбільш широкому діапазоні від 80 до 120 мм, яка істотно не змінить співвідношення розподілу турбулентних потоків. Струмінь носить цілісний характер і знаходиться на безпечній відстані від стінок кристалізатора, кінетична енергія струменя встигає розсіятися до горизонту кристалізації, не створюючи передумов для підмивання коринки металу по осі кристалізатора, а швидкості в зоні меніска входять в допустиму норму.
{"title":"Investigation of the Influence of the Inner Diameter and the Depth of Placement of the Sen in the Mold of Radial Billet CCM","authors":"A. Verzilov, A. Semenko, Yu.Yu. Kulish, D. I. Goyda, A. Verzilova, D. Vasiliev","doi":"10.15407/plit2020.02.015","DOIUrl":"https://doi.org/10.15407/plit2020.02.015","url":null,"abstract":"Вивчено проблематику оптимізації параметрів лиття при розливанні сортової заготовки високої якості безперервнолитим способом. Проведено дослідження впливу внутрішнього діаметра та глибини розташування зануреного стакана у кристалізаторі радіальної сортової (МБЛЗ). В основу досліджень взято конструкцію проточного зануреного стакана в умовах роботи кристалізатора сортової МБЛЗ ПАТ «Дніпровський металургійний комбінат», глибина розташування зануреного стакана в діапазоні від 60 до 180 з кроком 20 мм, діаметри порожнини зануреного стакана – 28, 32, 36 мм. В результаті досліджень встановлено, що використання зануреного стакана з внутрішнім діаметром 28 мм можливо в тому випадку, якщо глибина його занурення знаходиться в діапазоні від 80 до 100 мм. Варіювання глибини заглиблення в цій межі істотно не змінює характер розподілу потоків. Струмінь носить чітко сформований спрямований характер і знаходиться на достатній відстані від стінок кристалізатора. Використання зануреного стакана з внутрішнім діаметром 36 мм ускладнено в зв'язку з тим, що струмінь на всіх глибинах занурення стакана носить несформований характер і притискається до більшого радіусу. Внаслідок чого можливе підмивання затверділої коринки металу і існує ймовірність утворення проривів. Однак, виявлено глибину занурення стакану 100 мм, яка задовольняє вимогам, необхідним для отримання сортової заготовки високої якості. Конвективний потік виходить з зануреного стакана, проникає в рідку фазу на допустиму величину, а швидкості під дзеркалом металу не створюють умов для розвитку процесів хвилета вихроутворення і захоплення ШУС. Застосування зануреного стакана з внутрішнім діаметром 32 мм є найбільш виправданим. При його використанні можлива зміна глибини в найбільш широкому діапазоні від 80 до 120 мм, яка істотно не змінить співвідношення розподілу турбулентних потоків. Струмінь носить цілісний характер і знаходиться на безпечній відстані від стінок кристалізатора, кінетична енергія струменя встигає розсіятися до горизонту кристалізації, не створюючи передумов для підмивання коринки металу по осі кристалізатора, а швидкості в зоні меніска входять в допустиму норму.","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46865529","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 : 2020-06-01DOI: 10.15407/plit2020.02.003
V. Dovbenko, Production Enterprise Ukrcabel Llc, A. Verkhovliuk
{"title":"Features of Producing Aluminum From Wastes of Foundry","authors":"V. Dovbenko, Production Enterprise Ukrcabel Llc, A. Verkhovliuk","doi":"10.15407/plit2020.02.003","DOIUrl":"https://doi.org/10.15407/plit2020.02.003","url":null,"abstract":"","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48491196","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 : 2020-06-01DOI: 10.15407/plit2020.02.037
O. Shcheretskyi, R. Sergiienko, A. Verkhovliuk, O. Zhelezniak, O. Semashko
Technological modes of bushing casting from composite materials by the ligature method have been developed using lost foam casting process. The lost foam casting process is currently one of the most effective and promising methods for producing high-quality castings having a predetermined dimensional accuracy, and the required surface smoothness which is no worse than the lost wax casting. The lost foam casting process is becoming more widespread in the production of foundry products from aluminum alloys. For aluminum alloys casting, polystyrene foam of lower density and a larger residual pressure (at a level of 40 − 50 kPa) in vacuum form are used in contrast to the steel, cast iron and copper alloys casting. The base alloy for producing of composite materials was cast aluminum alloy AK7. The cemented carbide ВК6 wastes and silicon carbides as large as 60 − 600 microns were used as reinforcing elements; they were introduced into the aluminum melt using ligatures. The ligatures were preliminarily obtained by the method of forced impregnation of dispersed particles in vacuum using aluminium alloy AK7 melt. The melting was carried out in an induction furnace in a graphite crucible. The melt temperature was above 150 − 200 0 C the liquidus temperature. An analysis of the experimental results showed that in order to obtain high-quality castings by the lost foam casting process, it is necessary to follow the melting and casting param-eters: the overheat temperature is t over = 880 − 890 0 С (for АK7 – 5 mass % ВК6) and the overheat temperature is t over = 910 − 920 0 С (for АK7 – 5 mass % SiC), holding time is 8 − 10 min and the casting temperature is t cast = 820 − 830 0 С, the density of polystyrene foam models should be in the range from 0.022 g/cm 3 to 0.024 g/cm 3 . An experimental batch of plain bearings was manufactured and their industrial testing was carried out at the TzDV «GAL-KAT» industrial enterprise. Tests have shown that the developed composite materials can be used in friction units as an alternative substitute for bronze. A reduction in the plain bearings mass is achieved by a factor of 3, as well as a reduction in cost due to the lower price of the composite materials.
{"title":"Development of Optimal Technological Modes for Production of Composite Materials by Lost Foam Casting ProcessDevelopment of Optimal Technological Modes for Production of Composite Materials by Lost Foam Casting Process","authors":"O. Shcheretskyi, R. Sergiienko, A. Verkhovliuk, O. Zhelezniak, O. Semashko","doi":"10.15407/plit2020.02.037","DOIUrl":"https://doi.org/10.15407/plit2020.02.037","url":null,"abstract":"Technological modes of bushing casting from composite materials by the ligature method have been developed using lost foam casting process. The lost foam casting process is currently one of the most effective and promising methods for producing high-quality castings having a predetermined dimensional accuracy, and the required surface smoothness which is no worse than the lost wax casting. The lost foam casting process is becoming more widespread in the production of foundry products from aluminum alloys. For aluminum alloys casting, polystyrene foam of lower density and a larger residual pressure (at a level of 40 − 50 kPa) in vacuum form are used in contrast to the steel, cast iron and copper alloys casting. The base alloy for producing of composite materials was cast aluminum alloy AK7. The cemented carbide ВК6 wastes and silicon carbides as large as 60 − 600 microns were used as reinforcing elements; they were introduced into the aluminum melt using ligatures. The ligatures were preliminarily obtained by the method of forced impregnation of dispersed particles in vacuum using aluminium alloy AK7 melt. The melting was carried out in an induction furnace in a graphite crucible. The melt temperature was above 150 − 200 0 C the liquidus temperature. An analysis of the experimental results showed that in order to obtain high-quality castings by the lost foam casting process, it is necessary to follow the melting and casting param-eters: the overheat temperature is t over = 880 − 890 0 С (for АK7 – 5 mass % ВК6) and the overheat temperature is t over = 910 − 920 0 С (for АK7 – 5 mass % SiC), holding time is 8 − 10 min and the casting temperature is t cast = 820 − 830 0 С, the density of polystyrene foam models should be in the range from 0.022 g/cm 3 to 0.024 g/cm 3 . An experimental batch of plain bearings was manufactured and their industrial testing was carried out at the TzDV «GAL-KAT» industrial enterprise. Tests have shown that the developed composite materials can be used in friction units as an alternative substitute for bronze. A reduction in the plain bearings mass is achieved by a factor of 3, as well as a reduction in cost due to the lower price of the composite materials.","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45722030","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 : 2020-06-01DOI: 10.15407/plit2020.02.022
T. Narizhna, O. Doniі, M. Voron
Проведено порівняльні дослідження кінцевої структури алюмінієвого доевтектичного силуміну марки АК7М2 з підвищеним вмістом заліза у вихідному литому стані та після впливу зовнішнього постійного магнітного поля на розплав після процесу кристалізації. Макроскопічні дослідження показали, що після кристалізації силуміну без накладання зовнішнього постійного магнітного поля в структурі сплаву утворилися газові пори як наслідок значної газомісткості самого сплаву або проникнення в сплав газів, які виділяються з ливарної форми. За допомогою металографічного якісного аналізу в мікроструктурі сплаву АК7М2, що піддавався впливу магнітного поля, виявлено залізовмісні фази зіркоподібної та ієрогліфічної форм, що рівномірно розподіляються в об’ємі закристалізованого силуміну. Спостерігається рівномірний розподіл α-твердого розчину, фази Al 15 Fe 3 Si 2 , Al 5 SiFe та евтектики α + Si порівняно із силуміном у вихідному стані. Мікроструктурний аналіз та рентгенівський фазовий аналіз показали наявність фаз Al 5 SiFe і Al 15 Fe 3 Si 2 та відмінність їх кількості, розподілу і будови в залежності від умов кристалізації. За результатами вимірювання мікротвердості методом Вікерса виявлено, що внаслідок застосування зовнішнього постійного магнітного поля на розплав доевтектичного силуміну АК7М2 з підвищеним вмістом заліза можливо отримати вищі показники мікротвердості твердого розчину і евтектики α + Si в порівнянні з необробленим сплавом. На підставі результатів якісних і кількісних металографічних досліджень та рентгеноструктурного фазового аналізу зроблено висновки про характер впливу зовнішньої фізичної обробки на структуру сплаву АК7М2 після кристалізації.
{"title":"Influence of External Magnetic Field on Structure Formation of Al–Si System Aluminum Alloy with High Iron Content","authors":"T. Narizhna, O. Doniі, M. Voron","doi":"10.15407/plit2020.02.022","DOIUrl":"https://doi.org/10.15407/plit2020.02.022","url":null,"abstract":"Проведено порівняльні дослідження кінцевої структури алюмінієвого доевтектичного силуміну марки АК7М2 з підвищеним вмістом заліза у вихідному литому стані та після впливу зовнішнього постійного магнітного поля на розплав після процесу кристалізації. Макроскопічні дослідження показали, що після кристалізації силуміну без накладання зовнішнього постійного магнітного поля в структурі сплаву утворилися газові пори як наслідок значної газомісткості самого сплаву або проникнення в сплав газів, які виділяються з ливарної форми. За допомогою металографічного якісного аналізу в мікроструктурі сплаву АК7М2, що піддавався впливу магнітного поля, виявлено залізовмісні фази зіркоподібної та ієрогліфічної форм, що рівномірно розподіляються в об’ємі закристалізованого силуміну. Спостерігається рівномірний розподіл α-твердого розчину, фази Al 15 Fe 3 Si 2 , Al 5 SiFe та евтектики α + Si порівняно із силуміном у вихідному стані. Мікроструктурний аналіз та рентгенівський фазовий аналіз показали наявність фаз Al 5 SiFe і Al 15 Fe 3 Si 2 та відмінність їх кількості, розподілу і будови в залежності від умов кристалізації. За результатами вимірювання мікротвердості методом Вікерса виявлено, що внаслідок застосування зовнішнього постійного магнітного поля на розплав доевтектичного силуміну АК7М2 з підвищеним вмістом заліза можливо отримати вищі показники мікротвердості твердого розчину і евтектики α + Si в порівнянні з необробленим сплавом. На підставі результатів якісних і кількісних металографічних досліджень та рентгеноструктурного фазового аналізу зроблено висновки про характер впливу зовнішньої фізичної обробки на структуру сплаву АК7М2 після кристалізації.","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45487200","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 : 2020-06-01DOI: 10.15407/plit2020.02.043
G. Srebrianskyi
{"title":"The Alternative View on Obtaining a Metal Strip From the Melt","authors":"G. Srebrianskyi","doi":"10.15407/plit2020.02.043","DOIUrl":"https://doi.org/10.15407/plit2020.02.043","url":null,"abstract":"","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47266846","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 : 2020-06-01DOI: 10.15407/plit2020.02.065
T. Lysenko, V. Yasyukov, K. Kreitser, E. Kozishkurt
The possibility of using two metal wires for casting into a double mold on the installation of the U95A model was considered, and the influence of pouring each casting into a double mold from a separate metal wire on the quality of filling of the contours of the casting surface was studied. The research results were compared with the results of casting a double mold from a single metal wire. We used standard methods for determining the speed of mold filling, the quality of the surface of castings, and the filling capacity of the mold from several metal wires. To conduct a study on filling multi-seat forms from several metal wires, a double chill of the part “filter housing” was used, consisting of two side parts of the upper rod and a rotary pallet. To conduct the experiment, a new tray, and a new cover for the crucible of the filling device were developed for the existing equipment. The main parameter for conducting research was the fill rate. The estimated speed of filling the form was controlled during the research by the time of filling the form cavity. Improved system of metal supply to the casting at the low-pressure casting unit of the U95A model when filling multiseat forms from several metal wires, which allows to increase the productivity of the installation without significant changes in its design or its modernization. The conducted research allowed us to determine the possibility of using two metal wires installed in the furnace lid, showed better filling of the contours of the casting surface due to a decrease in the rate of metal entering the mold, simplification and reduction of the length of the gating system. Reducing the speed helps to fill the form more smoothly without disconnecting the flow of liquid metal. No leaks of compressed air were detected, and the rate of pressure increase in the furnace crucible remained the same as when using a single metal wire.
{"title":"Obtaining Castings in Low-pressure Casting Using Multiple Metal Wires","authors":"T. Lysenko, V. Yasyukov, K. Kreitser, E. Kozishkurt","doi":"10.15407/plit2020.02.065","DOIUrl":"https://doi.org/10.15407/plit2020.02.065","url":null,"abstract":"The possibility of using two metal wires for casting into a double mold on the installation of the U95A model was considered, and the influence of pouring each casting into a double mold from a separate metal wire on the quality of filling of the contours of the casting surface was studied. The research results were compared with the results of casting a double mold from a single metal wire. We used standard methods for determining the speed of mold filling, the quality of the surface of castings, and the filling capacity of the mold from several metal wires. To conduct a study on filling multi-seat forms from several metal wires, a double chill of the part “filter housing” was used, consisting of two side parts of the upper rod and a rotary pallet. To conduct the experiment, a new tray, and a new cover for the crucible of the filling device were developed for the existing equipment. The main parameter for conducting research was the fill rate. The estimated speed of filling the form was controlled during the research by the time of filling the form cavity. Improved system of metal supply to the casting at the low-pressure casting unit of the U95A model when filling multiseat forms from several metal wires, which allows to increase the productivity of the installation without significant changes in its design or its modernization. The conducted research allowed us to determine the possibility of using two metal wires installed in the furnace lid, showed better filling of the contours of the casting surface due to a decrease in the rate of metal entering the mold, simplification and reduction of the length of the gating system. Reducing the speed helps to fill the form more smoothly without disconnecting the flow of liquid metal. No leaks of compressed air were detected, and the rate of pressure increase in the furnace crucible remained the same as when using a single metal wire.","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47272794","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 : 2020-06-01DOI: 10.15407/plit2020.02.030
V. Doroshenko
{"title":"Examples of Manufacturing Cast Parts for Wind Power Plants and Prospects for the Application of this LGM Process","authors":"V. Doroshenko","doi":"10.15407/plit2020.02.030","DOIUrl":"https://doi.org/10.15407/plit2020.02.030","url":null,"abstract":"","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42188190","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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