Regulation of residual stress of carbon steel parts by electropulsing treatment and tempering

doi:10.13251/j.issn.0254-6051.2020.05.022

Abstract

Abstract: To optimize the residual stress controlled process, the effects of electropulsing treatment and tempering on quenched residual stress of the 45 carbon steel were studied. The voltage to generate electro pulse was 2120 V, and the capacitance was 400 μF. The results show that the release rates of quenched residual stress by electropulsing treatment, 600 ℃ tempering and 200 ℃ tempering are about 50%, 80% and 40% respectively, and the effective time is 30, 20 and 120 min respectively. Furthermore, the parts after electropulsing treatment and 200 ℃ tempering have high hardness about 51 HRC and the quenched martensite microstructure is remained, but the parts after 600 ℃ tempering have low hardness, 23 HRC and the microstructure changes greatly.

Key words: residual stress, electropulsing treatment, tempering, hole-drilling strain-gauge method, martensite

CLC Number:

TG113.25

Pan Long, Chu Bin, Wang Baosheng, Xu Zhenqin. Regulation of residual stress of carbon steel parts by electropulsing treatment and tempering[J]. Heat Treatment of Metals, 2020, 45(5): 119-122.

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