Effect of plasma nitriding on microstructure and high temperature wear resistance of 304L stainless steel

doi:10.13251/j.issn.0254-6051.2022.07.043

Abstract

Abstract: An experimental study on plasma nitriding with different temperatures was carried out on the 304L stainless steel thermowell for incinerator as the research object. Microstructure and properties of the 304L stainless steel thermowell before and after plasma nitriding were analyzed by OM, SEM, microhardness tester and the wear resistance at 400 ℃ was studied. The results show that surface hardened layer over 1300 HV is formed after plasma nitriding of the 304L stainless steel. With the increase of nitriding temperature, the surface hardness is improved and the thickness of hardened layer is increased significantly. The wear and high temperature oxidation resistance of the 304L stainless steel are improved by plasma nitriding.

Key words: thermowell for incinerator, 304L stainless steel, plasma nitriding, hardened layer, high temperature wear resistance

CLC Number:

TG156.8

Cao Zhen, Li Ji, Luo Ping, Li Jiahui, Li Jiongli, Wang Xudong. Effect of plasma nitriding on microstructure and high temperature wear resistance of 304L stainless steel[J]. Heat Treatment of Metals, 2022, 47(7): 253-258.

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