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The pressure treatment effect on the high‑strength austempered ductile iron structure 压力处理对高强度奥氏体回火球墨铸铁结构的影响
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2024-06-11 DOI: 10.21122/1683-6065-2024-2-134-140
P. E. Lushchik, A. I. Pokrovsky, I. V. Rafalsky, A. Rulenkov
{"title":"The pressure treatment effect on the high‑strength austempered ductile iron structure","authors":"P. E. Lushchik, A. I. Pokrovsky, I. V. Rafalsky, A. Rulenkov","doi":"10.21122/1683-6065-2024-2-134-140","DOIUrl":"https://doi.org/10.21122/1683-6065-2024-2-134-140","url":null,"abstract":"This paper presents the results of a study on the effect of pressure treatment (direct hot extrusion) on the structure of graphite inclusions and the metallic matrix of high‑strength austempered ductile iron. Comparative analysis of the cooling processes of the cast high‑strength ductile iron billet without deformation and after deformation was carried out using simulation modeling methods. The results of the study on the effect of hot deformation (up to 950–970 ℃) on the fracture structure and mechanical properties of austempered high‑strength ductile iron billets are presented.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"82 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141359598","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}
引用次数: 0
On the motion of a spherical cavity in a melt 关于熔体中球形空腔的运动
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2024-06-11 DOI: 10.21122/1683-6065-2024-2-141-145
M. N. Vereshchagin, Yu. D. Chernichenko, S. V. Shishkov
{"title":"On the motion of a spherical cavity in a melt","authors":"M. N. Vereshchagin, Yu. D. Chernichenko, S. V. Shishkov","doi":"10.21122/1683-6065-2024-2-141-145","DOIUrl":"https://doi.org/10.21122/1683-6065-2024-2-141-145","url":null,"abstract":"Gas inclusions significantly influence the quality of solidifying melts. Dissolved gases in liquid metals, due to diffusion and chemical reactions, contribute to the formation and growth of new inclusions. The mathematical problem of the dynamic behavior of a spherical cavity is solved using the Navier‑Stokes equation, treating the melt as a viscous incompressible fluid. An expression for the change in radius of a spherical cavity under Newtonian behavior of the melts is obtained.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"18 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356508","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}
引用次数: 0
Structural stability during remelting of foundry binary alloys 铸造二元合金重熔时的结构稳定性
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2024-06-11 DOI: 10.21122/1683-6065-2024-2-29-31
E. I. Marukovich, V. Stetsenko, A. Stetsenko
{"title":"Structural stability during remelting of foundry binary alloys","authors":"E. I. Marukovich, V. Stetsenko, A. Stetsenko","doi":"10.21122/1683-6065-2024-2-29-31","DOIUrl":"https://doi.org/10.21122/1683-6065-2024-2-29-31","url":null,"abstract":"A nanostructural mechanism of structural stability during remelting of foundry binary alloys has been developed. This mechanism is determined by the stability of the centers of crystallization of microcrystals of α‑phases and β‑phases. It is shown that this stability depends on the concentration of adsorbed hydrogen and oxygen atoms. The higher these concentrations, the less stable the centers of crystallization of α‑phase and β‑phase microcrystals in melts of foundry binary alloys, and vice versa. With an increase in overheating and (or) the holding time of melts of foundry binary alloys, the concentrations of adsorbed hydrogen and oxygen atoms in them increase. As a result, structural stability decreases during the remelting of foundry binary alloys.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"40 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141355430","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}
引用次数: 0
Analysis of structure and strength properties of heat‑resistant iron‑chromium‑nickel (Inconel 718) alloy obtained using secondary metal powder composition in direct laser deposition 利用激光直接沉积二次金属粉末成分获得的耐热铁铬镍（Inconel 718）合金的结构和强度性能分析
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2024-06-11 DOI: 10.21122/1683-6065-2024-2-57-62
D. A. Baranov, E. I. Shchedrin, S. S. Zhatkin, K. V. Nikitin
{"title":"Analysis of structure and strength properties of heat‑resistant iron‑chromium‑nickel (Inconel 718) alloy obtained using secondary metal powder composition in direct laser deposition","authors":"D. A. Baranov, E. I. Shchedrin, S. S. Zhatkin, K. V. Nikitin","doi":"10.21122/1683-6065-2024-2-57-62","DOIUrl":"https://doi.org/10.21122/1683-6065-2024-2-57-62","url":null,"abstract":"This work presents investigations on the structure, chemical analysis, and strength properties of deposited metal using two types of metal powder compositions, namely the primary powder and the residuals (secondary) of the heat‑resistant ironchromium‑nickel alloy Inconel 718.Based on the obtained results, the causes of the formation of a fine‑cellular‑dendritic directional structure with needle and dendritic morphology were determined, as well as the decrease in heat resistance of the deposited material from the secondary powder of the heat‑resistant iron‑chromium‑nickel alloy Inconel 718 at elevated temperatures.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"20 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356588","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}
引用次数: 0
Laser deposition of aluminum and magnesium‑based alloys for repair and surface restoration of components 用于部件修复和表面复原的铝基和镁基合金激光沉积技术
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2024-06-11 DOI: 10.21122/1683-6065-2024-2-117-124
B. M. Nemenenok, O. G. Devoyno, P. E. Lushchik, I. V. Rafalski, A. Rulenkov
{"title":"Laser deposition of aluminum and magnesium‑based alloys for repair and surface restoration of components","authors":"B. M. Nemenenok, O. G. Devoyno, P. E. Lushchik, I. V. Rafalski, A. Rulenkov","doi":"10.21122/1683-6065-2024-2-117-124","DOIUrl":"https://doi.org/10.21122/1683-6065-2024-2-117-124","url":null,"abstract":"The results of studying the processes of laser deposition of aluminum and magnesium‑based alloys, the features of the structure of deposited layers using electron microscopy and X‑ray computed tomography data, measurements of microhardness after laser deposition of aluminum and magnesium alloys are presented. Modeling of the stress‑strain state of flat components during laser deposition of an aluminum‑magnesium alloy containing 0.6–0.95 % magnesium, 0.7–1.0 silicon, up to 0.3 titanium, up to 0.5 zinc, and up to 0.4 % manganese was performed. The nature of the distribution of deformations and stresses during the use of various technological schemes of laser deposition during surface treatment of aluminum‑magnesium alloys by laser deposition methods is established.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"12 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356405","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}
引用次数: 0
Study of glued elements of model kits under atmospheric conditions and contact with molding mixtures 研究模型套件在大气条件下和与成型混合物接触时的胶合元件
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2024-06-11 DOI: 10.21122/1683-6065-2024-2-125-133
M. L. Kalinichenko
{"title":"Study of glued elements of model kits under atmospheric conditions and contact with molding mixtures","authors":"M. L. Kalinichenko","doi":"10.21122/1683-6065-2024-2-125-133","DOIUrl":"https://doi.org/10.21122/1683-6065-2024-2-125-133","url":null,"abstract":"The quality of obtained castings directly depends on the model equipment and the materials used for its production. The properties of elements of model kits, made of plastic and joined using glue technology, are examined. The properties of these joints were evaluated through natural aging under atmospheric conditions. Works were carried out to analyze the influence of abrasive properties of the molding mixture and its components on the quality of glued model kits. Hardness and plasticity tests of the molding mixture were conducted using G. M. Orlov’s sample with both standard and plastic inserts, both integral and glued.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"52 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141360381","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}
引用次数: 0
Combined use of kaolin and bentonite molding clays 联合使用高岭土和膨润土成型粘土
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2024-06-11 DOI: 10.21122/1683-6065-2024-2-32-35
S. A. Kulikov, F. I. Rudnickij, V. A. Shumigaj
{"title":"Combined use of kaolin and bentonite molding clays","authors":"S. A. Kulikov, F. I. Rudnickij, V. A. Shumigaj","doi":"10.21122/1683-6065-2024-2-32-35","DOIUrl":"https://doi.org/10.21122/1683-6065-2024-2-32-35","url":null,"abstract":"The article compares the properties of kaolin and bentonite clays. It has been shown that kaolin clays have high fire resistance, and bentonites have high astringent properties. The experience of specialists from OJSC “MTW” in the joint use of various types of clays is considered. The combination of kaolin and bentonite in the suspension made it possible to increase the strength of the molding sand while maintaining moisture levels. The disadvantage of kaolin clay suspensions is that the moisture content increases with increasing dosage. When preparing bentonite suspensions, their short shelf life should be taken into account.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"44 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141358847","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}
引用次数: 0
Research on technological parameters affecting the quality of adhesive joints in casting model assemblies and assessment of their operational properties in liquid and humid environments 研究影响铸造模型组件粘接质量的技术参数，并评估其在液态和潮湿环境中的运行特性
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2024-06-11 DOI: 10.21122/1683-6065-2024-2-96-105
M. L. Kalinichenko, B. M. Nemenenok
{"title":"Research on technological parameters affecting the quality of adhesive joints in casting model assemblies and assessment of their operational properties in liquid and humid environments","authors":"M. L. Kalinichenko, B. M. Nemenenok","doi":"10.21122/1683-6065-2024-2-96-105","DOIUrl":"https://doi.org/10.21122/1683-6065-2024-2-96-105","url":null,"abstract":"Modern casting model kits, often created using adhesive technologies, can experience deformations leading to warping and even destruction. This can occur due to differences in thermal expansion and moisture absorption rates between the material and the adhesive. The study evaluated the behavior of the adhesive joint in model kit elements under operational conditions in liquid and humid environments, assessing the hardness and strength of the joint. The analysis revealed a correlation between the density of the plastic and the quality of the adhesive joint.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"59 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141358214","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}
引用次数: 0
The influence of dispersing structure in multiple drawing on the plasticity of low‑carbon steel 多次拉拔中的分散结构对低碳钢塑性的影响
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2024-06-11 DOI: 10.21122/1683-6065-2024-2-54-56
V. P. Fetisov
{"title":"The influence of dispersing structure in multiple drawing on the plasticity of low‑carbon steel","authors":"V. P. Fetisov","doi":"10.21122/1683-6065-2024-2-54-56","DOIUrl":"https://doi.org/10.21122/1683-6065-2024-2-54-56","url":null,"abstract":"During repeated drawing of low‑carbon steel, the initial grain size of ferrite and the intensity of hardening affect the accumulation of defects in the crystal structure and the overall decrease in the plastic properties of cold‑formed wire. Minimizing the cell sizes and reducing the intensity of deformation hardening for a more dispersed initial structure maintain an increased relative contraction of fine‑grained steel after large total compressions. The increase in the tendency to harden coarse‑grained steel is accompanied by an increased decrease in the ductility of the wire during repeated drawing. Large total compressions increase the structural sensitivity of the relative constriction of low‑carbon wire.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356073","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}
引用次数: 0
Technology of flame‑induction heating of ferrous metal shavings in hot briquetting installations 热压块装置中黑色金属刨花的火焰感应加热技术
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2024-06-11 DOI: 10.21122/1683-6065-2024-2-72-81
O. M. Dyakonov, V. J. Sereda
{"title":"Technology of flame‑induction heating of ferrous metal shavings in hot briquetting installations","authors":"O. M. Dyakonov, V. J. Sereda","doi":"10.21122/1683-6065-2024-2-72-81","DOIUrl":"https://doi.org/10.21122/1683-6065-2024-2-72-81","url":null,"abstract":"As a result of the study of flame‑induction heating of steel and cast iron shavings, optimal heating modes, dimensions of the furnace and the ratio of the sizes of its components (gas‑flame and induction heaters) were established, which served as the basis for the development of a new heating technology, which ensures minimization of dimensions in comparison with known analogues, increasing the productivity and efficiency of the furnace. It has been established that at the stage of evaporation and removal of water vapor and light oil fractions from the chips in the temperature range of 100–550 °C until the optimal oil concentration of 1.5–3.0 % is achieved, among all known methods of muffle heating, gas‑flame heating is the most economical and productive heating, and subsequently, when heating a dehydrated porous mass of metal with a density of 1100–1700 kg/m3 to 850 °C – induction heating in an atmosphere of products of thermal sublimation and destruction of coolant. It is advisable to carry out induction heating with a current frequency of 2.0–2.4 kHz with a ratio of the lengths of the gas‑flame and induction heating zones of 2.0–2.5 and the dimensions of the inductor (height to hole diameter) of 3.7–4.0. The degree of oxidation of hot‑pressed briquettes corresponds to the initial oxygen content in the chips: for steel – 1.3–1.7 %, for cast iron – 0.46–0.47 %. The data obtained made it possible to develop a technology for flame‑induction heating of ferrous metal shavings, as well as the design of a small‑sized furnace with a specific productivity of 6500–9500 kg/m2·h and an efficiency of 40–45 %.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"89 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141359544","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}
引用次数: 0
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