Influence of heat treatment on the magnetic properties of Fe-28%Cr-7%Co-2%Mo-0.5%Si powder hard magnetic alloy

Fourth interdisciplinary scientific forum with international participation "New materials and promising technologies"

Vompe, T.A.^1 ; Milyaev, I.M.^1

A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow

119334, Russia^1

关键词: Additional annealing;    Energy products;    Hard magnetic alloy;    Residual induction;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/525/1/012011/pdf
DOI  :  10.1088/1757-899X/525/1/012011

来源: IOP

【 摘 要 】

The hard magnetic alloy Fe-28%Cr-7%Co-2%Mo-0.5%Si (in wt. %) was prepared by the methods of powder metallurgy. The maximum magnetic properties on the alloy was received after the TMT temperature of 540 °C and was the following: residual induction Br up to 1.3 T, coercive force Hc up to 40 kAm-1 and maximum energy product (BH)max up to 31 kJm-3. The hardness of the alloy increases from 228 to 250 HV 30 in the temperature range of spinodal decomposition at 600-660 °C. The coefficient of thermal expansion of the alloy is 13,1∗10-6 K-1. It was found that the additional annealing of the alloy till 460 °C can increase the coercive force approximately for 6 kAm-1.