Tempering brittleness of 2Cr13 stainless steel

doi:10.13251/j.issn.0254-6051.2022.12.039

Abstract

Abstract: Changes of hardness, impact property and fracture morphology evolution of the 2Cr13 stainless steel after tempering near the tempering brittle temperature interval were studied. The results show that hardness of the 2Cr13 stainless steel after tempering at 490-550 ℃ is 40-50 HRC, the corresponding impact property shows a downward trend; After tempering at 570-620 ℃, the hardness of the 2Cr13 stainless steel is 30-38 HRC, the impact property gradually increases. Through the observation of the impact fracture morphology, after tempering at 490-560 ℃, the fracture mode first changes from cleavage fracture to intergranular fracture. With the increase of the tempering temperature, it eventually changes to a fracture mode along the grain+cleavage. Microscopically, the size of the fracture surface along the grain gradually decreases, and the number of cleavage gradually increases, which is manifested by the improvement of the impact performance on the macroscopic level.

Key words: 2Cr13 stainless steel, tempering brittleness, impact property, hardness

CLC Number:

TG166

Zhu Hongwei, Wang Ping, Hu Wanting, Chen Xin, Huang Yanjun, Yu Ruixing, Zhuang Yuanhong, Chen Yongshuan. Tempering brittleness of 2Cr13 stainless steel[J]. Heat Treatment of Metals, 2022, 47(12): 234-236.

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