Effect of heat treatment on magnetic permeability of austenitic stainless steel

doi:10.13251/j.issn.0254-6051.2024.09.042

Abstract

Abstract: Based on the concept of relative permeability μ, a heat treatment of 1050 ℃×2 h for 316L austenitic stainless steel under vacuum condition of <10 Pa was conducted. The relative permeability values of the original, heat-treated and processed after heat treatment specimens corresponding to the thickness direction and the outside diameter direction after machining by the water-cutting were measured and analyzed by means of the direct measurement of Stephens magnetic permeability meter Ferromaster Plus. The results show that compared with the original specimen, the average permeability in the thickness direction of the heat-treated specimen decreases by 14.0%, and the average permeability in the outside diameter direction after machining by the water-cutting decreases by 16.2%. Compared with the heat-treated specimen, the average value of magnetic permeability in the thickness direction of processed specimens after heat treatment is 1.04, and there is no change. Heat treatment can not only reduce the permeability of raw materials, but also improve the stability of permeability of the processed materials after heat treatment.

Key words: cryogenic superconducting magnet, austenitic stainless steel, magnetic permeability, heat treatment

CLC Number:

TG166.2

Lan Xianhui, Ge Zhengfu, Ma Peng, Chen Chuan, Zhou Tao, Liu Wei, Li Chao. Effect of heat treatment on magnetic permeability of austenitic stainless steel[J]. Heat Treatment of Metals, 2024, 49(9): 255-259.

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