Analysis on crack causes of 30CrMnSiA steel ring support

doi:10.13251/j.issn.0254-6051.2024.04.047

Abstract

Abstract: After quenched-tempered heat treatment, cracks were found in the ear pieces of an aircraft part of frame ring made of 30CrMnSiA steel plate. Comprehensive analysis of the cracked frame ring and raw material were carried out through macro and micro morphology examination, spectrum chemical composition analysis and mechanical properties test. The results show that the crack cause of the frame ring is a problem of raw material quality, due to insufficient annealing of raw materials, there is serious segregation, resulting in high local hardness and eventually quenching cracks.

Key words: steel plate, segregation, heat treatment, quenching crack

CLC Number:

TG157

Dong Na, Xu Zhoujue, Li Xiangjun, Zhou Wufeng, Chen Qifang, Tan Ruiqi, Yang Xiyang. Analysis on crack causes of 30CrMnSiA steel ring support[J]. Heat Treatment of Metals, 2024, 49(4): 293-296.

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Analysis on crack causes of 30CrMnSiA steel ring support

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