A. B. Ankudinov, A. Yu. Ivannikov, V. A. Zelenskii, A. B. Mikhailova, M. A. Kaplan, V. S. Yusupov
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引用次数: 0
Abstract
The structure, phase composition, mechanical and magnetic properties of deformable hard magnetic Fe–30Cr–20Co–2Mo alloy obtained by sintering (1400°C, 240 min) of elemental powder compacts. The effect of quenching (1300°C, water) and stepwise heat treatment on the structure, mechanical properties during compression and magnetic characteristics of the samples is established. In the samples after sintering, a high proportion of the brittle sigma phase is recorded (~47%). The yield strength of such samples under compression is 1330 MPa with a brittle nature of fracture. After quenching, the yield strength decreases to 607 MPa, but the ductility of the samples increases. The increase in the samples ductility after quenching is associated with the fixation of the ferrite phase in the structure with a small amount of chromium oxides. After stepwise heat treatment, the ductility remains close to the ductility of quenched samples, but the yield strength increases to 1190 MPa. The Portevin–Le Chatelier effect is observed on such samples. Structural changes in the alloy during stepwise heat treatment lead to the appearance of technically suitable magnetic properties (residual induction 0.83 T, coercive force 56.4 kA/m, magnetic product 16 kJ/m3).
期刊介绍：
Steel in Translation is a journal that represents a selection of translated articles from two Russian metallurgical journals: Stal’ and Izvestiya Vysshikh Uchebnykh Zavedenii. Chernaya Metallurgiya . Steel in Translation covers new developments in blast furnaces, steelmaking, rolled products, tubes, and metal manufacturing as well as unconventional methods of metallurgy and conservation of resources. Papers in materials science and relevant commercial applications make up a considerable portion of the journal’s contents. There is an emphasis on metal quality and cost effectiveness of metal production and treatment.
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