Carbide evolution and its effect on corrosion resistance of martensitic stainless steel during tempering

doi:10.13251/j.issn.0254-6051.2023.07.007

Abstract

Abstract: Carbide evolution of 1.4116 martensitic stainless steel during tempering was studied by means of microstructure observation, energy spectrum analysis and hardness test, and the corrosion resistance after tempering at different temperatures was studied through salt spray corrosion test and electrochemical test. The results show that when the tempering temperature exceeds 500 ℃, a large number of Cr-rich carbides are precipitated, which is the main reason for the decrease of corrosion resistance. When tempering at 580 ℃, the self-corrosion potential is the lowest and the corrosion resistance is the worst, however, when the tempering temperature exceeds 600 ℃, the self-corrosion potential increases and the corrosion resistance is significantly improved. In actual production, the 1.4116 martensitic stainless steel should not be tempered at 500-600 ℃.

Key words: martensitic stainless steel, tempering, carbide, corrosion resistance

CLC Number:

TG156

Chen Jun, Zhang Qinyi, Deng Jinqiang, Yuan Shengfu, Zhou Hongfeng, Wu Dong. Carbide evolution and its effect on corrosion resistance of martensitic stainless steel during tempering[J]. Heat Treatment of Metals, 2023, 48(7): 38-43.

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