Metallurgist最新文献

Formation of optimal slag composition in ladle furnace for improvement of desulfurization properties and optimization of consumption of slag-forming materials 在钢包炉中形成最佳炉渣成分，以改善脱硫性能并优化成渣材料的消耗量

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-11-08 DOI: 10.1007/s11015-024-01805-3

A. A. Metelkin, O. Yu. Sheshukov, M. V. Saveliev, D. K. Egiazaryan, A. S. Tkachev, V. Yu. Elin

引用次数: 0

Thermobarrier and antifriction properties of triboceramics on the surface of a cutting tool with (TiAlCrSiY)N/(TiAlCr)N coating during high-speed dry cutting 带 (TiAlCrSiY)N/(TiAlCr)N 涂层的切削工具表面摩擦陶瓷在高速干切削过程中的隔热性能和抗摩擦性能

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-11-08 DOI: 10.1007/s11015-024-01809-z

A. I. Kovalev, D. L. Wainstein, E. P. Konovalov, V. O. Vakhrushev, S. A. Dmitrievskii, A. A. Tomchuk

{"title":"Thermobarrier and antifriction properties of triboceramics on the surface of a cutting tool with (TiAlCrSiY)N/(TiAlCr)N coating during high-speed dry cutting","authors":"A. I. Kovalev, D. L. Wainstein, E. P. Konovalov, V. O. Vakhrushev, S. A. Dmitrievskii, A. A. Tomchuk","doi":"10.1007/s11015-024-01809-z","DOIUrl":"10.1007/s11015-024-01809-z","url":null,"abstract":"<div><p>The physical mechanism of self-organization of a multilayer nanolaminated coating based upon non-equilibrium (TiAlCrSiY)N/(TiAlCr)N nitride on a cutting tool during high-speed (600 m/min.) dry cutting of N13 steel is established. Using a set of modern surface analysis methods coating degradation and tribo-oxidation are studied within the running-in and steady stages of wear. It is shown that during cutting, amorphous-nanocrystalline films of oxides similar to Cr<sub>2</sub>O<sub>3</sub>, TiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub> (sapphire) and Al<sub>2</sub>O<sub>3</sub> · 2 (SiO<sub>2</sub>) (mullite) are formed within a wear crater. Using computer calculations by a finite element method, heat transfer is considered in the cutting zone during formation of protective tribo-oxides. It is found that among all tribo-oxides, mullite has the best thermal barrier properties. Oxidation is the main adaptation mechanism of a cutting tool under extreme mechanical and thermal shock during high-speed cutting. The topography of chip contact surface is studied at various cutting stages, which makes it possible to establish a change in plastic deformation mechanisms of treated metal and friction cutting modes. Quantum chemical calculations of the electron structure of mullite show the highest degree of its electron polarization and explain the radical drop in friction coefficient during film formation upon a wear surface. In this case, mullite acts as a solid lubricant.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 7","pages":"1001 - 1010"},"PeriodicalIF":0.8,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636883","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

Bumps on metallographic specimens of Fe29%Ni18%Co alloy sheets as a rejection criterion 将铁29%镍18%钴合金板金相试样上的凹凸作为剔除标准

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-11-07 DOI: 10.1007/s11015-024-01814-2

P. A. Golovkin

{"title":"Bumps on metallographic specimens of Fe29%Ni18%Co alloy sheets as a rejection criterion","authors":"P. A. Golovkin","doi":"10.1007/s11015-024-01814-2","DOIUrl":"10.1007/s11015-024-01814-2","url":null,"abstract":"<div><p>The causes of the formation of bumps on metallographic specimens of sheets and strips subject to inspection are established by analyzing the components of Kovar alloy (trademarked name of Fe29%Ni18%Co precision alloy; named 29NK-VI in Russia) and identifying possible deviations from its manufacturing process, starting from the preparation of the initial melt. It was found out that the formation of bumps is a manifestation of leading diffusion of some alloy components into others, mainly cobalt into nickel. Such a phenomenon may occur in case of significant chemical inhomogeneity of the metallic material caused by the segregation of the components of its initial melt according to their magnetic susceptibility and the refusal to homogenize the resulting ingot.</p><p>It is argued that bumps on specimens should be considered as a rejection criterion for a material intended for the manufacture of precision parts of vacuum electronic devices, as they are indicative of its unbalanced composition. The residual diffusion phenomena contribute to the change in the phase state of the material, followed by embrittlement, change in precise dimensions, and loss of vacuum in parts of vacuum electronic devices. It is assumed that residual diffusion is one of the causes of the γ→α phase transformation in Kovar at low temperatures.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 7","pages":"1050 - 1058"},"PeriodicalIF":0.8,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636878","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

Assessment of shear strains, kinematic state, and deformation zone in two-high screw rolling processes 评估双高螺杆轧制过程中的剪切应变、运动状态和变形区

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-11-07 DOI: 10.1007/s11015-024-01815-1

B. A. Romantsev, M. M. Skripalenko, M. N. Skripalenko, V. S. Yusupov, V. A. Vorotnikov, A. A. Sidorov

引用次数: 0

Influence of drill pipe manufacturing technology on fracture mechanisms and fatigue properties 钻杆制造技术对断裂机理和疲劳性能的影响

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-11-07 DOI: 10.1007/s11015-024-01804-4

B. S. Ermakov, O. V. Shvetsov, N. O. Shaposhnilov, S. A. Vologzhanina, E. E. Balakhnina

引用次数: 0

Structure of the metal matrix Mo-based alloy produced by the EBM method 用 EBM 方法生产的金属基 Mo 基合金的结构

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-11-07 DOI: 10.1007/s11015-024-01813-3

I. A. Bogachev, D. I. Sukhov, I. Yu. Efimochkin, P. E. Kuznetsova

{"title":"Structure of the metal matrix Mo-based alloy produced by the EBM method","authors":"I. A. Bogachev, D. I. Sukhov, I. Yu. Efimochkin, P. E. Kuznetsova","doi":"10.1007/s11015-024-01813-3","DOIUrl":"10.1007/s11015-024-01813-3","url":null,"abstract":"<div><p>We perform structural investigations of a molybdenum-based cermet material obtained by the method of selective electron-beam melting. The initial material is an alloy of the Mo–Si–B system alloyed with a reinforcing component in the form of an Al<sub>2</sub>O<sub>3</sub>–Y<sub>2</sub>O<sub>3</sub>–ZrO<sub>2</sub> oxide composition. It is shown that, in the process of selective electron-beam melting of spheroidized cermet particles of the alloy of Mo–Si–B system in the optimal technological mode of synthesis, we observe melting both of the molybdenum matrix of the alloy and of the reinforcing particles contained in the original granules. As a result, in the course of crystallization of the melt with formation of a cellular structure on the boundaries of cells, we observe the appearance of finely divided oxide particles 1–5 μm in size, which are also composite particles. On the boundaries of cells and inside oxide inclusions, we reveal the elevated content of silicon as compared to that in the body of cells, which enables us to conclude that the processes of diffusion of this element occur in the analyzed material. At the same time, in the vicinity of the contour of samples of synthesized material, we detect the formation of a structure, which inherits, to a certain extent, the structure of the initial spheroidized granules.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 7","pages":"1040 - 1049"},"PeriodicalIF":0.8,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636880","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

Assessment of the environmental risks of a foundry shop when making steel for the production of machinery and mining equipment 评估铸造车间在为机械和采矿设备生产炼钢时的环境风险

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-11-06 DOI: 10.1007/s11015-024-01819-x

M. A. Maksimova, L. I. Belykh

{"title":"Assessment of the environmental risks of a foundry shop when making steel for the production of machinery and mining equipment","authors":"M. A. Maksimova, L. I. Belykh","doi":"10.1007/s11015-024-01819-x","DOIUrl":"10.1007/s11015-024-01819-x","url":null,"abstract":"<div><p>An analysis of new legislative documents on the management, methods, and technologies for assessing environmental risks was performed. The risk assessment algorithm was applied to the foundry shop of a metallurgical enterprise (Proizvodstvennaya Kompaniya) in the city of Irkutsk. The technological process of casting and forming steel products was investigated with a detailed analysis of emissions into the environment for each technological stage. The measures currently used by the enterprise to reduce its negative impact are discussed. When identifying the sources of hazards in the foundry, numerous violations of environmental legislation were identified. A register of environmental hazards with a ranking of consequences was compiled, which showed that the most severe hazard to the ecosystem would occur in the event of a global fire at the foundry shop with a possibly fatal outcome. The scenario of an electric arc furnace accident with the release of pollutants into the atmosphere was calculated as the most negative event. To assess the risks of possible hypothetical accidents, the event tree analysis, failure mode and effects analysis, and failure mode, effects, and criticality analysis methods, which are semiquantitative and suitable for primary risk assessment, were used. The calculation of the probability and criticality of failures of electric arc furnace elements showed that, if the cooling system fails, then the furnace will explode and the foundry shop will catch fire, threatening the lives of workers and emitting a large amount of pollutants into the atmosphere. Equipment modernization was proposed as corrective measures taking into account the best available technologies.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 7","pages":"1087 - 1096"},"PeriodicalIF":0.8,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636814","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

EQUIPMENT UPGRADE AND REPAIR 设备升级和维修

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-11-06 DOI: 10.1007/s11015-024-01817-z

S. A. Martynov, Z. Liu, A. G. Luzin

引用次数: 0

Iron extraction from dust from scrap metal smelting in electric arc furnaces by magnetic separation 用磁选法从电弧炉冶炼废金属的粉尘中提取铁

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-11-06 DOI: 10.1007/s11015-024-01818-y

G. M. Koishina, E. A. Zholdasbay, A. A. Argyn, Yu. B. Icheva, M. B. Kurmanseitov, N. K. Dosmukhamedov

{"title":"Iron extraction from dust from scrap metal smelting in electric arc furnaces by magnetic separation","authors":"G. M. Koishina, E. A. Zholdasbay, A. A. Argyn, Yu. B. Icheva, M. B. Kurmanseitov, N. K. Dosmukhamedov","doi":"10.1007/s11015-024-01818-y","DOIUrl":"10.1007/s11015-024-01818-y","url":null,"abstract":"<div><p>This work extends the boundaries of a new technology for the complex processing of dust obtained from melting scrap metal in electric arc furnaces at a factory in Kazakhstan by extracting zinc and lead into commercial products. Comprehensive studies of the elemental and phase compositions of dust conducted using a JED-2300 scanning electron microscope showed high contents of zinc (more than 30%), lead (approximately 5%), and iron. A considerable part of the iron in the dust (up to 35%) is represented as magnetite. Because of the lack of rational processing technology, a large amount of dust has accumulated on the plant territory, which requires a solution for its disposal with complex extraction of precious metals.</p><p>The general concept of the technology under development is based on an approach that ensures the disposal of multicomponent ferrous metallurgy dust to obtain a wide range of commodity products with high added value. At the same time, the high content of iron present as magnetite demonstrates the effectiveness of isolating iron as an iron-containing commercial product at the beginning of the technological scheme.</p><p>This paper shows the fundamental possibility of separating iron from dust from the scrap metal melting in electric arc furnaces by magnetic separation. According to comprehensive studies, including the study of the material composition of the initial dust and magnetic separation products, magnetic dust separation produced an iron-containing product with a high (up to 68%) iron content. The residual minimum limit of the iron content in the nonmagnetic fraction in the form of magnetite has been established as 0.58%. Further processing of such material will considerably simplify the technology, reduce material costs, and improve product quality.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"68 7","pages":"1080 - 1086"},"PeriodicalIF":0.8,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636815","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

Control of the structure and mechanical properties of metastable β-titanium alloy VT47 by combined thermomechanical processing methods 用组合热机械加工方法控制可蜕变β钛合金 VT47 的结构和机械性能

IF 0.8 4区材料科学

Metallurgist Pub Date : 2024-10-29 DOI: 10.1007/s11015-024-01794-3

A. A. Shiryaev, N. A. Nochovnaya

引用次数: 0