Metallurgist最新文献_第10页

Improvement of technology for the production of jewelry wire from platinum alloys 铂合金首饰线生产技术的改进

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-10-15 DOI: 10.1007/s11015-024-01790-7

S. B. Sidelnikov, E. S. Lopatina, V. A. Lopatin, I. L. Konstantinov, Y. N. Mansurov, A. D. Arnautov, R. I. Galiev

{"title":"Improvement of technology for the production of jewelry wire from platinum alloys","authors":"S. B. Sidelnikov, E. S. Lopatina, V. A. Lopatin, I. L. Konstantinov, Y. N. Mansurov, A. D. Arnautov, R. I. Galiev","doi":"10.1007/s11015-024-01790-7","DOIUrl":"10.1007/s11015-024-01790-7","url":null,"abstract":"<div>The paper presents the findings of research on the production of wire from 850 and 585 platinum-based alloys intended for use in jewelry chains. The chemical compositions of two novel jewelry alloys of 585 platinum-containing modifying additives of rhodium and ruthenium are proposed and patented. An analysis was carried out to evaluate the existing section rolling and drawing schedules for the three platinum alloys to identify more efficient drafting methods, with a focus on reducing the labor intensity of metal deformation processes and minimizing the force parameters. A computer model of section rolling for the studied jewelry alloys, based on 850 and 585 platinum, was developed to analyze the shape variation and force parameters of the process and to propose a new deformation schedule for the studied alloys with the accepted reduction distribution per pass. The new deformation schedule was characterized by a more uniform reduction distribution per pass than that observed in the existing schedule, allowing the number of rolling passes to be reduced due to their redistribution. In order to determine the rolling force and to model the process, an approximation formula was used to calculate the time resistance, which is dependent on the total degree of compression. By using proprietary software and computer simulation, the parameters of wire drawing with a diameter of up to 0.25 mm from the studied alloys were calculated, which allowed the deformation and force parameters to be assessed when implementing the proposed drafting schedule. In addition, it was established that the drawing process exhibits a sufficiently high safety factor and low power consumption. It is therefore recommended that the process be subjected to industrial testing. The findings of this research can be recommended for improving the technology of wire manufacturing from the 850 and 585 platinum alloys intended for jewelry chains.</div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 6","pages":"828 - 836"},"PeriodicalIF":0.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modernization of the control system for gas purification in ferroalloy furnaces 铁合金炉气体净化控制系统的现代化

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-10-14 DOI: 10.1007/s11015-024-01772-9

V. D. Pavlidis, M. V. Chkalova

引用次数: 0

Criteria for early detection of slag in steel casting 早期检测钢铸件夹渣的标准

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-10-14 DOI: 10.1007/s11015-024-01803-5

D. A. Poleshchenko, A. V. Korenev, Y. A. Kovrizhnykh

引用次数: 0

Vacuum synthesis of composite powder of Al–Ni system for fabricating aluminum-matrix composite reinforced with Al3Ni particles 真空合成 Al-Ni 系统复合粉末，用于制造 Al3Ni 颗粒增强的铝基复合材料

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-10-08 DOI: 10.1007/s11015-024-01780-9

K. S. Senkevich, D. A. Ivanov

{"title":"Vacuum synthesis of composite powder of Al–Ni system for fabricating aluminum-matrix composite reinforced with Al3Ni particles","authors":"K. S. Senkevich, D. A. Ivanov","doi":"10.1007/s11015-024-01780-9","DOIUrl":"10.1007/s11015-024-01780-9","url":null,"abstract":"<div>The composite powder containing Al3Ni and Al3Ni2 intermetallic compounds was obtained by vacuum synthesis to reinforce the aluminum matrix of the developed composite. For this purpose, nickel and aluminum powders were mixed in a ball mill, followed by heating the resulting mixture in vacuum to 650 °C to initiate an exothermic reaction between the powder components. To obtain an Al–Al3Ni composite, the synthesized composite powder and matrix aluminum powder were mixed in a mill, followed by compacting the resulting mixture and sintering the obtained samples in vacuum. It has been found that vacuum synthesis results in the formation of a composite powder with heterogeneous phase composition, including Al3Ni, Al3Ni2, Al4C3, and Al. Carbon formed as a result of thermal decomposition of stearin on the surface of aluminum particles reacts with aluminum to form aluminum carbide. After sintering the compacted mixture of aluminum and composite powders, a composite reinforced with Al3Ni and Al4C3 phases is formed. Tribological tests have shown that the obtained composite is a promising wear-resistant material with hybrid reinforcement by intermetallic and carbide phases.</div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 5","pages":"735 - 749"},"PeriodicalIF":0.8,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of calcium additive on the kinetics of oxidation of solid lead babbit B(PbSb15Sn10) 钙添加剂对固体巴比特铅 B（PbSb15Sn10）氧化动力学的影响

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-10-04 DOI: 10.1007/s11015-024-01777-4

I. N. Ganiev, F. K. Khodzhaev, A. H. Odinaev

{"title":"Effect of calcium additive on the kinetics of oxidation of solid lead babbit B(PbSb15Sn10)","authors":"I. N. Ganiev, F. K. Khodzhaev, A. H. Odinaev","doi":"10.1007/s11015-024-01777-4","DOIUrl":"10.1007/s11015-024-01777-4","url":null,"abstract":"<div>The paper considers the results of a study on the oxidation kinetics of lead babbit B(PbSb15Sn10) with calcium in a temperature range of 373–473 K. In addition, the resulting oxidation products of alloys and their microstructure are examined. The studies were carried out using the thermogravimetric method in air at atmospheric pressure within the temperature range of 373–473 K. It was found that the oxidation process in the entire studied temperature range can be accurately described by a degree four polynomial. In the experiments, a variation in the oxidation rate was measured over time. The kinetic and energy parameters of the alloy oxidation process were determined. It was found that calcium additives increase the oxidability of the initial alloy B(PbSb15Sn10) in the temperature range of 373–473 K. It was demonstrated that the additives of the alloying component significantly alter the alloy microstructure. X‑ray diffraction analysis revealed that the oxidation products of lead babbit B(PbSb15Sn10) with 1.0 wt % calcium include the following oxides: Pb2Sn2O6; PbO; Sn2O4, SnO, Pb0.866O2, Sb2O5, Ca(Sb2O6), and Ca2Sb.</div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 5","pages":"711 - 719"},"PeriodicalIF":0.8,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","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 the effect of calcium on structure, physicomechanical and technological properties of deformable alloy Al-3%Mg-0.8%Mn 钙对可变形合金 Al-3%Mg-0.8%Mn 的结构、物理力学和工艺性能的影响研究

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-10-04 DOI: 10.1007/s11015-024-01774-7

V. V. Doroshenko, A. A. Aksenov, K. A. Tsydenov, D. M. Strekalina, E. V. Yakushko, L. E. Gorlov

{"title":"Study of the effect of calcium on structure, physicomechanical and technological properties of deformable alloy Al-3%Mg-0.8%Mn","authors":"V. V. Doroshenko, A. A. Aksenov, K. A. Tsydenov, D. M. Strekalina, E. V. Yakushko, L. E. Gorlov","doi":"10.1007/s11015-024-01774-7","DOIUrl":"10.1007/s11015-024-01774-7","url":null,"abstract":"<div>In this work the effect of 2% calcium on the structure, deformability and physicomechanical properties of Al-3%Mg‑0.8%Mn alloy is investigated. A hot rolling temperature of 400 °C for the alloy with calcium without prior homogenization appeared to be low, resulting in cold rolled sheets containing multiple defects, in contrast to a refrence alloy without calcium. During homogenization annealing at 550 °C aluminum-calcium eutectic is highly fragmented, which facilitates rolling. Evaluation of alloy with calcium resistance to recrystallization shows that hot-rolled sheets begin to lose strength after 250 °C, while for cold-rolled sheets this temperature is limited to 200 °C. Cold-rolled sheets of Al-3%Mg‑0.8%Mn alloy also have a temperature for the start of recrystallization of 250 °C, which is associated with liberation during hot rolling of nanosized dispersoids of Al6(Mn, Fe) phase, which as a result of heterogenization at 550 °C have micron sizes. At the same time, cold-rolled sheets with added calcium have higher hardness and yield strength after one-hour annealing at 400 °C (71/61 HV and 124/107 MPa). Relative elongation is also better for alloy with added calcium. It is also shown that calcium addition increases corrosion current density from 0.71·105 to 0.92·105 A/m2, while its value remains at the level for AMg5 alloy or grade 5182 alloy.</div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 5","pages":"683 - 691"},"PeriodicalIF":0.8,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of transformation of axial chemical inhomogeneity of metal in the process of thick-sheeted rolling 厚板轧制过程中金属轴向化学不均匀性的转变模型

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-09-06 DOI: 10.1007/s11015-024-01771-w

D. N. Chikishev, A. M. Baryshnikova

引用次数: 0

Development and industrial exploitation of welding technology for heat-resistant nickel alloys for high-temperature nuclear power plants 高温核电站耐热镍合金焊接技术的开发和工业利用

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-09-06 DOI: 10.1007/s11015-024-01770-x

A. F. Shevakin, P. A. Kharin, A. B. Korostelev, M. V. Shishimirov, V. O. Ivanov, A. I. Sednev, Yu. A. Korostelev, A. P. Pantyukhin

引用次数: 0

Influence of the properties of working liquid on the size characteristics of powders obtained under the conditions of electroerosion metallurgy of the wastes of TN20 tungsten-free hard alloy 工作液特性对在 TN20 无钨硬质合金废料电解冶金条件下获得的粉末粒度特性的影响

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-09-06 DOI: 10.1007/s11015-024-01783-6

Ekaterina Vladimirovna Ageeva, Anna Evgenievna Ageeva

引用次数: 0

Influence of chemical composition and hot rolling modes on the strength level of hot-rolled steel grade similar to S355MC 化学成分和热轧模式对类似于 S355MC 的热轧钢级强度水平的影响

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-09-06 DOI: 10.1007/s11015-024-01769-4

S. V. Antonov, A. V. Koldaev, I. I. Shopin, A. I. Dagman

{"title":"Influence of chemical composition and hot rolling modes on the strength level of hot-rolled steel grade similar to S355MC","authors":"S. V. Antonov, A. V. Koldaev, I. I. Shopin, A. I. Dagman","doi":"10.1007/s11015-024-01769-4","DOIUrl":"10.1007/s11015-024-01769-4","url":null,"abstract":"<div>Presently, the main trend in thin-sheet steel production, including the high-strength automobile steel, is to reduce production costs while retaining essential properties and quality. A considerable part of the cost of high-strength steel comes from alloying with expensive chemical elements such as vanadium and niobium. Simply reducing the content of these elements in finished products would compromise the mechanical properties of rolled products, leading to inferior quality and defects. This work, based on statistical analysis for steel grade S355MC, demonstrated the potential to reduce alloying while maintaining the required yield strength by adjusting the hot rolling conditions. It was also revealed that, in addition to the concentration of chemical elements and the hot rolling mode, the thickness of the finished product affects the tensile strength. Therefore, the analysis was performed exclusively on products with a thickness of 4 mm. The study resulted in a regression equation that illustrates the dependence of yield strength on vanadium content and hot rolling parameters.</div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 5","pages":"641 - 647"},"PeriodicalIF":0.8,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142214842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0