Optimization of the Heat Treatment of a Hard Magnetic Fe–30Cr–16Co–1Sm Powder Alloy

IF 0.4 Q4 METALLURGY & METALLURGICAL ENGINEERING Russian Metallurgy (Metally) Pub Date : 2024-03-19 DOI:10.1134/S003602952370009X

I. M. Milyaev, A. I. Milyaev, V. S. Yusupov, N. V. Laisheva, G. Yu. Lazarenko, E. V. Shuster

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Abstract

The optimization of heat treatment of an anisotropic hard magnetic Fe–30Cr–16Co–1Sm powder alloy is performed by experimental design using the Statgraphics and Statistica software. After optimization, the remanence is B_r = 1.252 T, the coercive force is H_cB = 53.08 kA/m, and maximum energy product is (BH)_max = 36.8 kJ/m³. Adequate regression equations of the dependences of B_r, H_cB, and (BH)_max on the heat treatment parameters (holding time during isothermal thermomagnetic treatment (ITMT), cooling rate from the ITMT temperature to 580°C, and cooling rate from 580 to 500°C) within variations of selected parameters in corresponding phase spaces are obtained. The studied magnetic hysteretic properties of the Fe–30Cr–16Co–1Sm alloy exceed those of one of the most widely used commercial alloys, YuNDK4 (GOST 17809–72) [1], by more than 40% at a lower cobalt content.

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硬磁性铁-30Cr-16Co-1Sm 粉末合金的热处理优化

利用 Statgraphics 和 Statistica 软件，通过实验设计对各向异性硬磁性 Fe-30Cr-16Co-1Sm 粉末合金的热处理进行了优化。优化后，剩磁为 Br = 1.252 T，矫顽力为 HcB = 53.08 kA/m，最大能量积为 (BH)max = 36.8 kJ/m3。在相应相空间中选定参数的变化范围内，得到了 Br、HcB 和 (BH)max 与热处理参数（等温热磁性处理 (ITMT) 期间的保温时间、从 ITMT 温度到 580°C 的冷却速率以及从 580°C 到 500°C 的冷却速率）之间的适当回归方程。研究发现，Fe-30Cr-16Co-1Sm 合金的磁滞特性比最广泛使用的商用合金之一 YuNDK4（GOST 17809-72）[1]的磁滞特性高出 40%以上（钴含量较低）。

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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.