ECAP法制备超细晶奥氏体08Kh18N10T钢的强度、弛豫性和耐蚀性:1 .组织与强度

IF 0.4 Q4 METALLURGY & METALLURGICAL ENGINEERING Russian Metallurgy (Metally) Pub Date : 2023-12-05 DOI:10.1134/S0036029523070066

V. I. Kopylov, V. N. Chuvil’deev, A. V. Nokhrin, M. Yu. Gryaznov, S. V. Shotin, K. E. Smetanina, N. Yu. Tabachkova

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摘要

研究了超细晶(UFG) 08Kh18N10T钢在150℃和450℃等径角挤压(ECAP)工艺下的显微组织和室温和高温力学性能。UFG钢具有较高的α′马氏体含量，加热后有σ相纳米颗粒析出。UFG钢具有较高的极限抗拉强度和良好的延展性。由于δ-铁素体颗粒在ECAP过程中破碎，UFG钢的Hall-Petch系数降低。

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Strength and Relaxation and Corrosion Resistance of Ultrafine-Grained Austenitic 08Kh18N10T Steel Produced by ECAP: I. Microstructure and Strength

The microstructure and mechanical properties (at room and elevated temperatures) of ultrafine-grained (UFG) 08Kh18N10T steel fabricated by equal-channel angular pressing (ECAP) at temperatures of 150 and 450°C are studied. The UFG steel is found to have a high α' martensite content, and σ-phase nanoparticles precipitate in it upon heating. The UFG steel is shown to have a high ultimate tensile strength and good ductility. The Hall–Petch coefficient of the UFG steel is found to decrease due to the fragmentation of δ-ferrite particles during ECAP.

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来源期刊

Russian Metallurgy (Metally) METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

0.70

自引率

25.00%

发文量

140

期刊介绍： Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.