Fracture cause analysis of a 50CrVA spring steel part

doi:10.13251/j.issn.0254-6051.2024.04.048

Abstract

Abstract: Fracture cause of a 50CrVA spring steel part was analyzed by means of metallographic microscope, scanning electron microscope and analyzer of oxygen, nitrogen and hydrogen. The results show that the fracture of the 50CrVA spring steel occurs at the stress concentration position in the right corner in type of hydrogen embrittlement produced due to incomplete hydrogen removal treatment after galvanizing. Finally, the improvement measures are proposed, i.e., the blunted blanking die should be timely replaced, and the time of the hydrogen removal treatment should be increased.

Key words: 50CrVA spring steel, parts, stress concentration, hydrogen embrittlement, die blunting

CLC Number:

TG142.1

Cui Jingbo, Wang Lingbo, Guo Fei, Lu Zhenguo. Fracture cause analysis of a 50CrVA spring steel part[J]. Heat Treatment of Metals, 2024, 49(4): 296-299.

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Fracture cause analysis of a 50CrVA spring steel part

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