Russian Metallurgy (Metally)最新文献_第9页

Deformability of a Hydrogen-Alloyed Intermetallic VTI-4 Titanium Alloy 氢合金金属间化合物VTI-4钛合金的变形性能

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Russian Metallurgy (Metally) Pub Date : 2025-08-28 DOI: 10.1134/S0036029525701022

O. Z. Pozhoga, A. A. Orlov, S. V. Skvortsova, A. M. Mamonov, P. A. Smirnov

引用次数: 0

Management of the New Industry of Scrap Metal (Vtormet) Based on Information Control in the State Digital Platform 基于国家数字平台信息控制的废金属新产业管理

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Russian Metallurgy (Metally) Pub Date : 2025-08-28 DOI: 10.1134/S0036029525701083

S. V. Bogdanov, T. V. Bogdanova

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Resistance of a Weld Metal to Various Types of Wear 焊接金属对各种磨损的抵抗力

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Russian Metallurgy (Metally) Pub Date : 2025-08-28 DOI: 10.1134/S0036029525700946

N. V. Kobernik, A. C. Pankratov, G. V. Orlik, A. G. Orlik, Yu. V. Andriyanov, A. A. Chuvikova

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Volume and Surface Properties of Nickel Melts Containing a Lead Impurity 含铅杂质镍熔体的体积和表面性能

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Russian Metallurgy (Metally) Pub Date : 2025-08-28 DOI: 10.1134/S0036029525700892

K. S. Filippov

{"title":"Volume and Surface Properties of Nickel Melts Containing a Lead Impurity","authors":"K. S. Filippov","doi":"10.1134/S0036029525700892","DOIUrl":"10.1134/S0036029525700892","url":null,"abstract":"Abstract—Physicochemical properties (surface tension, density) and structure of Ni–Pb melts with low (0.01, 0.025, and 0.05 wt %) lead contents are studied. Critical melting temperatures are determined. As the lead content increases, the melt density is found to increase to values, which exceed those expected for the additivities of heaver lead; this fact assumes the appearance of strong compression effect in the Ni–Pb system. In this case, the converging of temperature dependences measured during heating and cooling and decrease in hysteresis phenomena are observed. Near the melting temperature, the surface tension of the melt is found to decrease proportionally to the lead impurity content; surface active lead-based compounds form at the surface. After metal melting, the adsorption isotherm of lead in nickel is similar to the Langmuir isotherm. In accordance with the melting conditions, the adsorption in the Ni–Pb melts can be either positive or negative. Negative adsorption corresponds to the transition of a constituent from the surface into the volume; positive adsorption corresponds to the transition of the constituent from the volume to the interface. An increase in the lead content in the melts comprising residual oxygen favors suppression of the processes that cause a decrease in the surface tension and adsorption.","PeriodicalId":769,"journal":{"name":"Russian Metallurgy (Metally)","volume":"2025 1","pages":"120 - 126"},"PeriodicalIF":0.3,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909769","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}

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Effect of Chemical Composition and Globular Structure Parameters on the Mechanical Properties of VT6 Titanium Alloy Bars 化学成分和球状组织参数对VT6钛合金棒材力学性能的影响

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Russian Metallurgy (Metally) Pub Date : 2025-08-28 DOI: 10.1134/S003602952570082X

Yu. B. Egorova, L. V. Davydenko

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New Trends in Ultrasonic Testing of Flash Butt Welded Joints 闪光对接焊接接头超声检测的新趋势

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Russian Metallurgy (Metally) Pub Date : 2025-08-28 DOI: 10.1134/S0036029525700879

L. Yu. Mogilner, D. M. Kozlov

{"title":"New Trends in Ultrasonic Testing of Flash Butt Welded Joints","authors":"L. Yu. Mogilner, D. M. Kozlov","doi":"10.1134/S0036029525700879","DOIUrl":"10.1134/S0036029525700879","url":null,"abstract":"Abstract—The advantages of using flash butt welding for large-diameter pipes in the construction of main pipelines for various purposes, including the high productivity of this technology, are noted. However, one of the main factors limiting the use of this welding method in pipeline construction practice is the lack (until recently) of nondestructive testing methods capable of reliable detection of some defects, which appear during its application. Primarily, this refers to vertically oriented oxide films of various structures and configurations in the cross section of the weld. Recent studies have shown that the best results in detecting such defects can be achieved by combining diffraction and echo ultrasonic testing methods. To solve this problem, we analyze the capabilities of various ultrasonic testing methods applicable to welds of the given type. However, this type of flaw detection encounters some limitations, since the mentioned weld defects are semitransparent to ultrasonic waves. Therefore, additional possibilities of several atypical versions of mirror–shadow and echo ultrasonic testing methods are considered. The first of the methods examined in detail takes into account the structural features of the welds made by flash butt welding to verify their quality. The second method can be used to reliably detect a defect with a low ultrasonic wave reflectivity located in the fusion plane. The importance of continuing investigations into the capabilities of the methods under study and collecting statistical data to determine the reliability of the technologies based on their use is noted.","PeriodicalId":769,"journal":{"name":"Russian Metallurgy (Metally)","volume":"2025 1","pages":"106 - 115"},"PeriodicalIF":0.3,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909850","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}

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Factors Affecting the Self-Baking Electrode Formation in Ore-Smelting Furnaces: Part 2 影响熔炼炉自焙电极形成的因素：第2部分

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Russian Metallurgy (Metally) Pub Date : 2025-08-28 DOI: 10.1134/S0036029525700922

V. V. Zolotarev, A. I. Aliferov, V. D. Kochkin, V. A. Serikov

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Factors Affecting the Self-Baking Electrode Formation in Ore-Smelting Furnaces: Part 1 影响熔炼炉自焙电极形成的因素：第1部分

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Russian Metallurgy (Metally) Pub Date : 2025-08-28 DOI: 10.1134/S0036029525700910

V. V. Zolotarev, A. I. Aliferov, V. D. Kochkin, V. A. Serikov

引用次数: 0

Processing of Titanomagnetite Concentrate to Produce Slags Suitable for Further Recovery of Titanium and Vanadium 钛磁铁矿精矿加工制备适合进一步回收钛钒的渣

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Russian Metallurgy (Metally) Pub Date : 2025-08-28 DOI: 10.1134/S0036029525701058

K. V. Goncharov, A. S. Agamirova, T. V. Olyunina, G. B. Sadykhov

{"title":"Processing of Titanomagnetite Concentrate to Produce Slags Suitable for Further Recovery of Titanium and Vanadium","authors":"K. V. Goncharov, A. S. Agamirova, T. V. Olyunina, G. B. Sadykhov","doi":"10.1134/S0036029525701058","DOIUrl":"10.1134/S0036029525701058","url":null,"abstract":"The results of studying the processing of the titanomagnetite concentrate from the Gremyakha-Vyrmes deposit intended to produce granulated iron and a titanium–vanadium slag are presented. The most suitable method for processing this concentrate is direct iron reduction in a rotary hearth furnace, a key feature of which is the concentration of vanadium along with titanium in a slag suitable for subsequent hydrometallurgical processing to recover vanadium and titanium. To perform the process in a rotary hearth furnace, a protective carbon bed should be used to prevent contact between the molten slag and the refractory lining. The influence of the reducing agent content in a charge and the reduction temperature on the composition of the resulting titanium–vanadium slag is studied under reduction roasting conditions on a protective bed. Reduction with the addition of 16% coke at 1550°C leads to the formation of a slag with the following composition (wt %): 6.2 FeO, 43.9 TiO2, 20.6 Al2O3, 2.3 V2O5, 13.2 SiO2, 7.5 MgO, 4.3 CaO, 0.6 MnO, 0.4 Cr2O3, and 0.9 (K,Na)2O. The high content of titanium in the slag and its presence in the form of anosovite n[Al2O3⋅TiO2]⋅m[(Mg,Fe)O⋅2TiO2], which is easily decomposed in sulfuric acid, allows for further processing to recover vanadium and titanium. For vanadium recovery, the slag is proposed to be processed using the well-known lime–sulfuric acid method, which involves oxidizing roasting followed by sulfuric acid leaching of calcium vanadates. For titanium recovery, hydrometallurgical methods are suggested to synthesize products suitable for producing both metallic titanium and pigment-grade TiO2.","PeriodicalId":769,"journal":{"name":"Russian Metallurgy (Metally)","volume":"2025 1","pages":"225 - 229"},"PeriodicalIF":0.3,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909681","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

Thermomechanical Formation of the Internal Surfaces of Waveguide System Couplings 波导系统耦合内表面的热机械形成

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Russian Metallurgy (Metally) Pub Date : 2025-08-28 DOI: 10.1134/S0036029525701009

I. N. Kravchenko, D. U. Khas’yanova, E. I. Cherkasova, A. V. Kozlov

{"title":"Thermomechanical Formation of the Internal Surfaces of Waveguide System Couplings","authors":"I. N. Kravchenko, D. U. Khas’yanova, E. I. Cherkasova, A. V. Kozlov","doi":"10.1134/S0036029525701009","DOIUrl":"10.1134/S0036029525701009","url":null,"abstract":"A method has been developed for forming a complex connecting element with an internal surface (rectangular coupling) for a waveguide system pipe made of a shape memory alloy. The proposed method is based on the high-precision formation of a complex internal surface by restoring pre-deformed dimensions through a phase transition upon heating, followed by heat treatment above the recrystallization temperature of the connecting material (over 400°C) and maintaining the required shape. The method of plastic self-forming of complex asymmetric internal surfaces in parts made of shape memory alloys involves the following steps: fabrication of a mandrel tool from a structural material, featuring high surface finish and precision, with external dimensions mirroring the size and configuration of the finished part; production of a workpiece with a smooth internal surface, smaller in size than the final part made of a shape memory alloy; cooling the workpiece below the direct martensitic transformation temperature of the material; deforming it using the mandrel tool; heating the workpiece together with the mandrel above the reverse martensitic transformation temperature, resulting in restoration of the initial dimensions of the part and filling of the relief cavities with the coupling material onto the mandrel outer surface; fixing the material memory by heat treatment at a temperature above the recrystallization point followed by holding; and cooling below the direct martensitic transformation temperature and removing the mandrel tool. At temperatures below the recrystallization temperature, the parts are found to undergo plastic deformation, polishing, and heat treatment by applying external stress. The proposed method can be recommended for connecting pipelines in waveguide systems, ensuring their tightness under high magnetic impermeability of the gap and excess pressure differentials of up to 0.2 MPa.","PeriodicalId":769,"journal":{"name":"Russian Metallurgy (Metally)","volume":"2025 1","pages":"194 - 198"},"PeriodicalIF":0.3,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909780","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