Metallurgist最新文献

{"title":"Technology for restoring worn parts in mining machinery suspension systems","authors":"P. P. Petrov,&nbsp;P. P. Tarasov,&nbsp;K. V. Stepanova,&nbsp;A. D. Danilov,&nbsp;E. M. Maksimova","doi":"10.1007/s11015-026-02131-6","DOIUrl":"10.1007/s11015-026-02131-6","url":null,"abstract":"<div><p>This paper presents the study of the chemical composition, microstructure, and properties of ripper tooth materials from bulldozers manufactured by Komatsu (Japan), Caterpillar (USA), and the Chinese firm NBLF, as well as a remelted alloy derived from worn NBLF teeth. The study establishes the feasibility of using an induction melting furnace to remelt high-quality steel scrap near mining sites for manufacturing replacement parts. The study identifies changes in the chemical composition of the scrap material during the melting and casting processes. Furthermore, it provides a rationale for introducing a compensating quantity of alloying elements into the melt. The microstructure and properties of the resulting alloy were investigated. The structure consists of large, needle-like ferrite plates surrounded by accumulations of granular pearlite. Despite satisfactory levels of ductility and toughness, the as-cast alloy exhibits reduced hardness and low strength properties without subsequent heat treatment. This work lays the groundwork for further research aimed at refining melting, casting, and thermomechanical processing techniques for the production of materials with targeted properties.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 12","pages":"2017 - 2024"},"PeriodicalIF":0.9,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149176839","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}

{"title":"Construction of viscosity diagrams for blast-furnace slag of the CaO-SiO2-Al2O3-10%MgO-2%TiO2-0.5%MnO system by the method of simplex lattices","authors":"A. A. Babenko,&nbsp;R. R. Shartdinov,&nbsp;A. G. Upolovnikova,&nbsp;A. N. Smetannikov,&nbsp;V. Yu. Kuchin,&nbsp;S. V. Lukin","doi":"10.1007/s11015-026-02124-5","DOIUrl":"10.1007/s11015-026-02124-5","url":null,"abstract":"<div><p>The widespread practical application of titanium- and aluminum-containing ores in the process of smelting of cast iron in blast furnaces makes this process more complicated, mainly due to the changes in the physical properties of the slag system. In order to predict the specific features of the behavior of slags of the analyzed oxide system in the blast furnace, we studied the viscosity and liquidus temperature of slags of the CaO-SiO₂-Al₂O₃ system containing 10% MgO, 2% TiO₂, and 0.5% MnO, within the basicity range (CaO)/(SiO₂) = 0.6–1.5, and for the Al₂O₃ concentrations varying within the range 4–16% by using the simplex lattice method of experimental planning and the procedure of vibration viscosimetry. New data are obtained on the influence of basicity and aluminum oxide on the physical properties of slags of the analyzed oxide system. It is shown that, depending on the basicity and aluminum-oxide content, the slags formed as a result may belong both to homogeneous and to heterogeneous zone. Thus, the slags with a basicity of 0.9–1.2 containing 7–11%Al₂O₃ at temperatures of 1450 °C and higher are located in the homogeneous zone and have a viscosity of 0.6 Pa⋅sec; at the same tine, as the basicity becomes equal to 1.2–1.5, for an Al₂O₃ content of 4–6%, the slags shift into the heterogeneous zone and a slag viscosity increases to 6.0 Pa⋅sec.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 12","pages":"1947 - 1954"},"PeriodicalIF":0.9,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149176840","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}

{"title":"Influence of refractory materials of casting molds on the properties of iron-containing alloys produced by aluminothermy","authors":"S. G. Zhilin,&nbsp;V. V. Predein,&nbsp;N. A. Bogdanova","doi":"10.1007/s11015-026-02126-3","DOIUrl":"10.1007/s11015-026-02126-3","url":null,"abstract":"<div><p>The metal formed as a result of a single-stage aluminothermic process of getting iron-containing melts can be used in the foundry production (as a casting riser) and to obtain permanent joints (in seamless rail welding). Carbon materials guaranteeing the required refractoriness of casting molds used in processes of this kind are characterized by relatively high cost, which determines the necessity of searching their alternative. As a solution to this problem, we can propose the application of slags obtained as a result of aluminothermic processes. We present the results of experiments aimed at the determination of the effect of casting molds made of carbon and slag materials on numerous characteristics (chemical composition, microhardness, and structure) of the ingots of iron-containing alloys obtained as a result of aluminothermic remelting of thermite charges. The comparative analysis of the presented results enables us to assess the possibility of applying slags of aluminothermic process for getting iron-containing ingots.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 12","pages":"1964 - 1972"},"PeriodicalIF":0.9,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149176545","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}

{"title":"Effect of thermomechanical treatment on the precipitation behavior and mechanical properties of Al–Mn–Cu–Er–Be alloys","authors":"Olga A. Yakovtseva,&nbsp;Andrey G. Mochugovsky,&nbsp;Tamila M. Mardanshina,&nbsp;Alexey S. Prosviryakov,&nbsp;Mark S. Parkhomenko,&nbsp;Anastasia V. Mikhaylovskaya","doi":"10.1007/s11015-026-02121-8","DOIUrl":"10.1007/s11015-026-02121-8","url":null,"abstract":"<div><p>The evolution of microstructure and mechanical properties during aging was studied for as-cast and pre-deformed Al–Mn–Cu–Er–Be–(Zr) alloys, as well as reference Al–Zr alloy. In the as-cast state, the alloys form solid solutions supersaturated with transition metals and second-phase particles of eutectic origin containing Mn, Cu, and Er. Heat treatment of the as-cast alloys at 300–400 °C leads to increased hardness resulting from the decomposition of supersaturated Al-based solid solutions and precipitation of second-phase dispersoids. In pre-deformed samples, softening due to recovery processes competes with hardening from aging. The maximum hardness is observed after aging at 350 °C in both as-cast and pre-deformed Zr-containing alloys. Analysis of the hardness kinetics indicates that preliminary deformation accelerates the precipitation behavior in the studied alloys. The pre-deformed alloys maintain a non-recrystallized structure even after long-time exposure to temperatures up to 500 °C. Following thermomechanical treatment, the yield strength of the multicomponent alloys reached 340 MPa at room temperature and 113 MPa at 250 °C.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 12","pages":"1913 - 1925"},"PeriodicalIF":0.9,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149176438","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}

{"title":"Influence of the rolling method on the microstructure and mechanical properties of a five-layer composite material made of FeMn2Si–FeCr18Ni10 steels","authors":"V. E. Veselova,&nbsp;I. S. Kamantsev,&nbsp;K. D. Malygina,&nbsp;E. A. Putilova,&nbsp;A. E. Trokhacheva,&nbsp;T. S. Cherkasova","doi":"10.1007/s11015-026-02125-4","DOIUrl":"10.1007/s11015-026-02125-4","url":null,"abstract":"<div><p>We study the effect of asymmetric rolling (AR) on the evolution of the microstructure and mechanical properties of a five-layer composite metal consisting of the layers of FeMn2Si steel and FeCr18Ni10 austenitic steel. The comparison of asymmetric and symmetric rolling is carried out for a stress ratio equal to 1.16. It is shown that asymmetric rolling promotes a more uniform distribution of strains over the layers and elevation of the mechanical characteristics of the entire package.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 12","pages":"1955 - 1963"},"PeriodicalIF":0.9,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149176440","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}

{"title":"Control of the characteristics of alumothermal reaction products in the metallurgical production of iron-carbon alloys","authors":"O. N. Komarov,&nbsp;E. E. Abashkin,&nbsp;N. S. Lovizin,&nbsp;A. V. Popov","doi":"10.1007/s11015-026-02127-2","DOIUrl":"10.1007/s11015-026-02127-2","url":null,"abstract":"<div><p>Modern trends of industrial development are based on the use of new and developing resource-saving and energy-efficient technological processes, which makes it possible to obtain products with the required level of characteristics and significantly reduce production costs. In particular, the development and implementation of the technologies capable of reducing the material consumption of manufactured products, as well as the possibility of using affordable low-cost secondary materials as source materials, may give significant economic benefits to the commodity producers. In the metallurgical industry, which is among the leaders in the consumption of material and energy resources, the problem of implementing resource-saving technologies seems to be especially urgent. Aluminothermy is one of the methods that can be used to solve some problems existing in metallurgy. Technologies based on this method make it possible to use metal wastes of metallurgical and machine-building plants in the form of scale and shavings of aluminum alloys, as well as other metallic materials, which makes it possible to decrease the cost of final products. In the course of aluminothermy, it is most important to keep the ratio of the formed metal, slag and gas phases guaranteeing the elevated yield of iron-containing products. In order to perform this task, it is possible to use various methods developed to control exothermic processes, e.g., by changing the initial temperature of the thermite charge, by introducing various fillers in the compositions of mixtures, etc. We propose to study the influence of various combinations of fractional compositions of the source materials used for the formation of charge compositions on the ratios of the obtained reaction products, as well as on the chemical compositions and properties of the resulting alloys. Based on the results of our studies, it is shown that the applied combinations of fractional compositions of the materials provide the outputs of the metal, slag, and gas phases within the ranges 24.75–52.47 wt.%, 42.76–64.22 wt.%, and 1.16–11.03 wt.%, respectively. Depending on the conditions of the exothermic reaction and the fraction of metal yield, the obtained samples of iron-carbon alloys have concentrations of the main elements within the following ranges (wt.%): 0.067–2.612 C; 0.029–1.395 Mn; 0.022–1.181 Si; and 0.22–11.875 Al. The hardness of the experimental materials correlates with their structure and belongs to the range 150–622 HBW. The accumulated results made it possible to establish the possibility of control over the parameters of aluminothermal processes by combining the fractional compositions of the source components of thermite mixtures, which proves to be of great scientific and practical importance for commercial production.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 12","pages":"1973 - 1985"},"PeriodicalIF":0.9,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149176441","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}

{"title":"Development of technological solutions for producing longitudinal-seam electric-welded pile pipes without bulk heat treatment","authors":"S. A. Yalygin,&nbsp;B. S. Ermakov,&nbsp;O. V. Shvetsov,&nbsp;D. V. Nechaev","doi":"10.1007/s11015-026-02118-3","DOIUrl":"10.1007/s11015-026-02118-3","url":null,"abstract":"<div><p>This study developed technological solutions for producing longitudinal-seam electric-welded pipes without bulk heat treatment to meet the impact toughness requirements for the welded joint, as specified in SP 16.13330.2017. It was established that localized heat treatment only marginally increases the impact toughness of welded joints made from 09G2S steel, primarily due to a degree of microstructural homogenization. The content of non-metallic inclusions in the sheet billet was identified as one of the most critical parameters. Furthermore, optimization of the welding parameters on the pipe welding mill can also enhance the quality and serviceability of joints produced by high-frequency electric resistance welding.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 12","pages":"1887 - 1894"},"PeriodicalIF":0.9,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149176589","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}

{"title":"Laser processing of thin-sheet rolled aluminum-calcium alloy of the Al–Ca–Cu–Mn–Zr system","authors":"N. V. Letyagin,&nbsp;T. K. Akopyan,&nbsp;P. A. Palkin,&nbsp;S. O. Cherkasov,&nbsp;A. B. Lyukhter,&nbsp;I. S. Pechnikov,&nbsp;F. F. Musin","doi":"10.1007/s11015-026-02122-7","DOIUrl":"10.1007/s11015-026-02122-7","url":null,"abstract":"<div><p>Laser processing of thin-sheet rolled aluminum-calcium alloy of the Al-Ca-Cu-Mn-Zr system was studied to model its structure and properties obtained during additive manufacturing. The primary structural components of the hypereutectic Al4Ca3Cu1Mn0.4Zr alloy (both as-cast and after laser remelting) include the (Al, Cu)₄Ca and Al₂₇Ca₃Cu₇ phases, with Mn and Zr remaining in the aluminum solid solution. Laser remelting of thin-sheet rolled products, which creates crystallization conditions that are typical for additive manufacturing (AM) processes, prevents the formation of undesirable primary crystals of the Al₂₇Ca₃Cu₇ phase and ensures the formation of a quasi-eutectic structure during crystallization. The typical structure consists of dendritic cells (~ 3–4 μm) surrounded by eutectic intermetallic phases (~ 200 nm), which is 10 times thinner than structural components formed during casting at a crystallization rate of 10 K/s. The hardness of the formed structure increases by 10% compared to the as-cast state. Alloys subjected to laser remelting (85 <i>HV</i>) demonstrate thermal stability of the structure and properties during prolonged isothermal annealing (100 h) at 350–400 °C. The maximum temporary decrease in hardness values does not exceed ~ 10% due to the difference in kinetic features of coarsening of eutectic intermetallic phases and breakdown of (Al), leading to precipitation hardening caused by the formation of Al₆Mn particles and Al₃(Zr) nanoparticles (L1₂ phase).</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 12","pages":"1926 - 1934"},"PeriodicalIF":0.9,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149176752","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}

{"title":"Potential applications of bimetallic pipelines for offshore fields in the Arctic","authors":"Artem D. Davydov,&nbsp;Vladislav V. Kolnyshenko,&nbsp;Aleksander S. Fedorov,&nbsp;Vladimir S. Karasev,&nbsp;Boris S. Ermakov","doi":"10.1007/s11015-026-02113-8","DOIUrl":"10.1007/s11015-026-02113-8","url":null,"abstract":"<div><p>The Russian Federation has the world’s largest continental shelf, including extensive areas in the Arctic. Developing fields in this region is strategically and economically justified. More than twenty oil, gas, and gas-condensate fields have been discovered to date; however, development currently focuses mainly on high-margin, relatively uncomplicated assets. Where pipelines must meet strength and low-temperature toughness requirements while also providing enhanced internal corrosion resistance, metallurgically clad bimetallic pipes are an effective option for transporting produced hydrocarbons. Associated water and dissolved CO₂ and H₂S in oil, gas, or gas condensate impose stringent requirements on materials in service. This paper reports laboratory tests of domestically produced hot-rolled clad plates intended for flowline applications. The test program provides an integrated assessment of key service factors. Dynamic autoclave tests that simulate the flow of a corrosive medium were used to evaluate corrosion resistance under conditions close to operation. Mechanical tests were also performed on hot-rolled clad pipe product with a 09G2S steel backing and an AISI 321 steel cladding layer to assess how temperature affects the service performance of flowlines intended for Arctic operation.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 12","pages":"1837 - 1845"},"PeriodicalIF":0.9,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149176755","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}

{"title":"Principles for developing a synthetic modifier for casting high-strength cast iron grade VCh 50","authors":"V. V. Semenov,&nbsp;S. Yu. Manegin,&nbsp;A. I. Kovalev,&nbsp;D. L. Wainstein,&nbsp;E. P. Konovalov,&nbsp;S. A. Dmitrievsky","doi":"10.1007/s11015-026-02117-4","DOIUrl":"10.1007/s11015-026-02117-4","url":null,"abstract":"<div><p>This study investigates changes in the phase-structural state and chemical composition of fragments from an experimental large-scale casting of VCh50 grade cast iron, with wall thicknesses ranging from 18 to 54 mm, produced by LZ PZM LLC. The properties of these fragments were found to deviate from the requirements of GOST 7293-85, with the degree of deviation depending on the fragment thickness. We suggest that these discrepancies are characteristic of large-scale castings with significant wall-thickness variations. Using regression analysis, the influence of various factors on the mechanical properties of the casting and the magnitude of their deviation from the standard requirements was quantitatively determined. Computer modeling revealed the influence of the wall thickness on the cooling rate, undercooling, and duration of graphite nucleation and growth within austenite, as well as graphite degradation processes during secondary graphitization. Derived regression equations revealed that pearlite content and graphite nodularity predominantly determine the achievable mechanical properties of hypoeutectic high-strength cast iron in cast blanks. Combined with published data, these equations form the basis for optimizing modifier selection for both ladle and in-mold introduction.</p></div>","PeriodicalId":702,"journal":{"name":"Metallurgist","volume":"69 12","pages":"1873 - 1886"},"PeriodicalIF":0.9,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149176797","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}