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Performance evaluation of metal mould for casting aluminium alloy (AA6063) of scientific products in National agency for science and engineering infrastructure 国家科工局科技产品铸造铝合金(AA6063)金属模具性能评价
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-03-13 DOI: 10.21122/1683-6065-2023-1-51-57
Sh. Abdullahi Mohammed, T. Abdullahi Mohammed, S. Ibeh Chukwuemeka, S. Anyanwu Samuel
{"title":"Performance evaluation of metal mould for casting aluminium alloy (AA6063) of scientific products in National agency for science and engineering infrastructure","authors":"Sh. Abdullahi Mohammed, T. Abdullahi Mohammed, S. Ibeh Chukwuemeka, S. Anyanwu Samuel","doi":"10.21122/1683-6065-2023-1-51-57","DOIUrl":"https://doi.org/10.21122/1683-6065-2023-1-51-57","url":null,"abstract":"The study investigated the major Causes of inconsistency in the cast results of the aluminium cast products from the metal moulds supplied by the then Hungarian Technical Partners to Scientific Equipment Development Institute, Minna. The metal moulds for different scientific products for Schools Scientific Laboratories were to achieve mass production of these products. The aluminium alloy A6063 ingot used were likewise imported. However, another consignment of the ingot used is produced in Nigeria by Nigerian Aluminium Extrusion Company, Lagos. Result of the products defects including shrinkage, blow holes, etc. remained the same, hence the need for this investigation work to ascertain the causes traceable to either moulds or the class or group of alloys.The outcome as shown could be that pouring speed or melting temperature etcetera are responsible for the inconsistency in obtaining acceptable cast products at different operations and with these moulds. A particular product mould gives inconsistent cast products and varying defects. This is applicable to all the available moulds supplied to the Institute at the same time.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130393446","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
Influence of hydrogen on crystallization of cast magnesium alloys 氢对铸镁合金结晶的影响
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-03-13 DOI: 10.21122/1683-6065-2023-1-58-61
E. I. Marukovich, V. Stetsenko, A. Stetsenko
{"title":"Influence of hydrogen on crystallization of cast magnesium alloys","authors":"E. I. Marukovich, V. Stetsenko, A. Stetsenko","doi":"10.21122/1683-6065-2023-1-58-61","DOIUrl":"https://doi.org/10.21122/1683-6065-2023-1-58-61","url":null,"abstract":"It is shown that hydrogen is a demodifying element of the structure of cast magnesium alloys during their crystallization. Hydrogen atoms, adsorbing on elementary nanocrystals in melts, prevent the combination of nanocrystals into the nucleus of crystallization of α‑phase microcrystals. As a result, molds with an unmodified structure are formed. Modifiers reduce the concentration of adsorbed hydrogen in the melts of magnesium alloys. This results in the milling of α‑phase microcrystals in castings as they solidify.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132133351","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
Working conditions at workplaces in finishing operations departments of foundries 铸造厂精加工部门工作场所的工作条件
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-03-13 DOI: 10.21122/1683-6065-2023-1-138-142
A. М. Lazarenkov, M. A. Sadokha, A. A. Novik
{"title":"Working conditions at workplaces in finishing operations departments of foundries","authors":"A. М. Lazarenkov, M. A. Sadokha, A. A. Novik","doi":"10.21122/1683-6065-2023-1-138-142","DOIUrl":"https://doi.org/10.21122/1683-6065-2023-1-138-142","url":null,"abstract":"The working conditions at the workplaces of foundry workers when performing finishing operations, production factors determining them are considered. The results of studies of the parameters of the working conditions of the considered professions of foundry workers in comparison with the standard values are presented. It has been established that in a comprehensive assessment of the working conditions of foundries working in the department of financial operations, it is necessary to take into account the duration of stay at the working equipment, the equipment and hand tools used, the type of alloy being smelted (steel, cast iron, non‑ferrous metals) and the nature of production.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128809598","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: 1
Technology and equipment of roll straightening of sheet metal 板料辊矫直技术及设备
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-01-20 DOI: 10.21122/1683-6065-2022-4-70-78
V. Tamila, I. Vegera, V. Liaukovich, A. V. Vetoshkin
{"title":"Technology and equipment of roll straightening of sheet metal","authors":"V. Tamila, I. Vegera, V. Liaukovich, A. V. Vetoshkin","doi":"10.21122/1683-6065-2022-4-70-78","DOIUrl":"https://doi.org/10.21122/1683-6065-2022-4-70-78","url":null,"abstract":"The features of the editing technology, possible defects of sheet metal and piece blanks of complex configuration are presented. The main schemes and designs of sheet‑straightening machines are considered, as well as the main directions of improvement of LSM designs and editing technologies are highlighted. The analysis of the process of roll straightening is presented taking into account the phenomena occurring in a metal undergoing alternating loading with decreasing amplitude (interaction of elastic and plastic deformation, Bauschinger effect, etc.). The parabolic dependence of the residual curvature on the yield strength is noted. The obtained data were used in the design of the roll straightening complex and the technology of straightening sheet blanks of complex configuration.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121035713","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 and development of methods for predicting the physical and mechanical properties of thin wire and metal cord 细线和金属绳物理力学性能预测方法的研究与发展
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-01-20 DOI: 10.21122/1683-6065-2022-4-58-62
E. Eltsova, Yu. L. Bobarikin, Yuri. V. Martyanov
{"title":"Study and development of methods for predicting the physical and mechanical properties of thin wire and metal cord","authors":"E. Eltsova, Yu. L. Bobarikin, Yuri. V. Martyanov","doi":"10.21122/1683-6065-2022-4-58-62","DOIUrl":"https://doi.org/10.21122/1683-6065-2022-4-58-62","url":null,"abstract":"Predicting the physical and mechanical properties of thin wire and metal cord will ensure an increase in the quality of latuned thin wire, a reduction in the number and time of technological pauses, and increase the manufacturability of metal cord twisting. Considering that the deformation manifests anisotropy of the properties of thin wire, the prediction of physical and mechanical properties and the degree of unevenness of deformation becomes an urgent task.The paper studies that an increase in the drawing speed of a thin wire leads to the acquisition of a more uniform and fine‑grained structure. The dependences of the physico‑mechanical properties of thin latuned wire after the metal cord is twisted on the speed of fine drawing are developed. The effect of the deformation rate on the microhardness of a thin steel wire is investigated. It is determined that in order to increase the productivity of metal cord twisting, it is necessary to bring the dependence of the increase in hardness and equivalent stresses in metal cord wires to a linear form by changing the speed of the twisting at its individual stages. For practical use, the dependences of the mechanical properties of a thin wire of strength class HT on the drawing speed are derived.During the analysis, the results were obtained, which are applicable in the design of new or modification of existing routes for drawing thin wire, as well as in the design of new metal cord structures.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115356649","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
«Green» technologies in metallurgical production – a dream or reality? 冶金生产中的“绿色”技术——梦想还是现实?
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-01-20 DOI: 10.21122/1683-6065-2022-4-63-69
G. A. Rumiantseva, B. M. Nemenenok, A. V. Arabey, L. V. Tribushevskiy
{"title":"«Green» technologies in metallurgical production – a dream or reality?","authors":"G. A. Rumiantseva, B. M. Nemenenok, A. V. Arabey, L. V. Tribushevskiy","doi":"10.21122/1683-6065-2022-4-63-69","DOIUrl":"https://doi.org/10.21122/1683-6065-2022-4-63-69","url":null,"abstract":"The paper analyzes the existing technologies of metallurgical production with minimal harmful effects on the environment. Emissions of carbon dioxide into the atmosphere can be eliminated using hydrogen as a reducing agent with iron oxide. The best results are realized when hydrogen is produced by electrolysis of water, but such technologies require serious investments. More realistic in terms of creating “green” technologies in metallurgical production is to reduce the consumption of natural gas, capture waste gases of metallurgical production and use them to produce electricity and new types of products: methanol, synthetic alcohol, fertilizers and polymers. An integral part of “green” technologies is also the implementation of the NoWASTE concept, aimed at minimizing waste to be disposed of. Examples of non‑waste technologies for the processing of aluminum waste at OOO NPF Metallon are given.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122588166","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
Stamping of a complex profile part made of hard‑to‑form alloys 冲压由难以成形的合金制成的复杂轮廓零件
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-01-20 DOI: 10.21122/1683-6065-2022-4-97-100
V. Tamila, A. Y. Izobello, N. G. Kozyrev, A. L. Mantsivoda
{"title":"Stamping of a complex profile part made of hard‑to‑form alloys","authors":"V. Tamila, A. Y. Izobello, N. G. Kozyrev, A. L. Mantsivoda","doi":"10.21122/1683-6065-2022-4-97-100","DOIUrl":"https://doi.org/10.21122/1683-6065-2022-4-97-100","url":null,"abstract":"Using the example of the process of obtaining semi‑finished components of knee joint endoprostheses, the stages of obtaining a complex profile forging are demonstrated. A comparative analysis of obtaining the same product from different alloys is given. The methodology is given and the results of determining the energy‑power parameters of hot volumetric stamping of hard‑to‑form VT1–0 and Co‑Cr‑Mo alloys are presented. A typical scheme of the technological process of manufacturing forgings with an elongated axis and significant thickness differences characteristic of endoprostheses is determined.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129365788","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 modification of silumins 关于硅明的改性
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-01-20 DOI: 10.21122/1683-6065-2022-4-41-46
E. I. Marukovich, V. Stetsenko, A. Stetsenko
{"title":"On modification of silumins","authors":"E. I. Marukovich, V. Stetsenko, A. Stetsenko","doi":"10.21122/1683-6065-2022-4-41-46","DOIUrl":"https://doi.org/10.21122/1683-6065-2022-4-41-46","url":null,"abstract":"It has been shown that the elementary crystal cells of the basic products of modification of silumins, aluminum and silicon do not correspond to the principle of structural and dimensional correspondence of Dankov – Konobeevsky. Modifying elements B, Sr, P significantly increase the surface energy of liquid silumins, and Zr and Ti practically do not affect it. Modification of silumins is a nanostructured process. Ti, Zr, B form intermetallides that refine aluminum nanocrystals from demodifying adsorbed hydrogen atoms. Phosphorus, atomically dissolving in silumin, refiners silicon nanocrystals from adsorbed oxygen. Na and Sr form an emulsion and colloid in liquid silumin, which protect eutectic microcrystals of α‑and βSi‑phases from demodifying molecular hydrogen. All these processes increase the concentration of crystallization centers of dendritic microcrystals α‑and βSi‑phase, make them more branched and compact.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121923830","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
Experience in the production of wire rods made of steel grade SV‑08G2S for the subsequent manufacture of welding wire 有生产SV‑08G2S钢级线材的经验，可用于后续焊丝的生产
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-01-20 DOI: 10.21122/1683-6065-2022-4-55-57
S. V. Аudzeyey, V. V. Savinkov
{"title":"Experience in the production of wire rods made of steel grade SV‑08G2S for the subsequent manufacture of welding wire","authors":"S. V. Аudzeyey, V. V. Savinkov","doi":"10.21122/1683-6065-2022-4-55-57","DOIUrl":"https://doi.org/10.21122/1683-6065-2022-4-55-57","url":null,"abstract":"Welding wire used for welding metal structures must have high technological and mechanical properties, since it is the main material that provides the required chemical composition and properties of the metal of the welded seam of structures. This article describes the experience of producing wire rods made of steel grade Sv‑08G2S for the subsequent production of welding wire in the conditions of OJSC “BSW – Management Company of Holding “BMC”. The technology of welding wire production in the conditions of mill 150 has been developed with heat treatment of the produced wire rod to give it the required plasticity and subsequent processing in hardware production into welding wire. With the construction of a new modern small‑grade wire mill 370/150, the developed technology of welding wire production has been improved to obtain maximum plasticity of the initial wire rod in order to exclude all types of additional heat treatment at the hardware conversion due to the choice of a rational chemical composition of steel and the formation of a favorable microstructure of metal. The wire rod obtained as a result of the work has been successfully processed in hardware production into copper‑plated welding wire without additional heat treatment.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124418536","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
Methodology for assessing the dustiness of the air environment of the working areas of foundries 铸造厂工作区域空气环境粉尘度评定方法
Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) Pub Date : 2023-01-20 DOI: 10.21122/1683-6065-2022-4-132-136
A. М. Lazarenkov, M. A. Sadokha, T. P. Kot, A. A. Novik
{"title":"Methodology for assessing the dustiness of the air environment of the working areas of foundries","authors":"A. М. Lazarenkov, M. A. Sadokha, T. P. Kot, A. A. Novik","doi":"10.21122/1683-6065-2022-4-132-136","DOIUrl":"https://doi.org/10.21122/1683-6065-2022-4-132-136","url":null,"abstract":"The content of harmful substances in the air is an important parameter of the working conditions of foundry workers. Due to the peculiarities of the technology, there are many sources of intense dust emission in the foundry. The distribution of dust concentrations in the atmosphere of the workshops was determined from the equation of the dust balance in the workshop room. The possibility of obtaining by calculation an objective picture of the distribution of dust in various sections of foundries is shown. Data from various studies were used to determine the density and dust at various sites of foundries. The results of the theoretical calculations show that in foundries, dust capture is an effective means of reducing the dustiness of the air of working areas.","PeriodicalId":278844,"journal":{"name":"Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127571691","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: 2
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