Spheroidizing annealing process of medium carbon non-alloyed structural steel S55C

doi:10.13251/j.issn.0254-6051.2021.05.033

Abstract

Abstract: Different spheroidizing annealing processes of the S55C steel were carried out and the microstructure and hardness were studied. The results show that after holding at 740 ℃ for 5 h, slowly cooling to 700 ℃ for 5 h at a cooling rate of ≤20 ℃/h, and then slowly cooling to 680 ℃ for 5 h at a cooling rate of ≤40 ℃/h, and then air cooling, the microstructure of the S55C steel is spherical pearlite, the spheroidization rate is ≥90%, and the hardness value is 165 HBW, which meet the requirements of the customer.

Key words: S55C steel, spheroidizing annealing, spheroidization rate

CLC Number:

TG156.21

Shi Xiaofeng, Liu Ping, Li Bo, Zheng Wenchao, Li Bopeng, Pei Dandan, Lu Qiang. Spheroidizing annealing process of medium carbon non-alloyed structural steel S55C[J]. Heat Treatment of Metals, 2021, 46(5): 193-195.

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Spheroidizing annealing process of medium carbon non-alloyed structural steel S55C

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