Fracture analysis of 1Cr17Ni2 stainless steel bolt

doi:10.13251/j.issn.0254-6051.2025.03.048

Abstract

Abstract: An 1Cr17Ni2 stainless steel connection bolt of a device broke during routine maintenance. The chemical composition, metallographic structure, phase structure, fracture morphology and hardness of the bolt were analyzed by means of physical and chemical test. The result show that failure mode of the bolt is stress corrosion. The main causes of stress corrosion cracking are that the large-sized chromium-rich carbides in the material reduce its corrosion resistance and the hardness of the material exceeds the standard requirement, which makes it highly sensitive to stress corrosion.

Key words: 1Cr17Ni2 stainless steel, intergranular fracture, stress corrosion, carbide

CLC Number:

TG172

Chen Jieming, Su Junfeng, Wang Shuo, Li Xuefeng. Fracture analysis of 1Cr17Ni2 stainless steel bolt[J]. Heat Treatment of Metals, 2025, 50(3): 303-306.

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