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Article

Effect of Cryogenic Treatment on Microstructure, Mechanical Properties and Distortion of Carburized Gear Steels

1
Institute of Special Steel, Central Iron and Steel Research Institute, Beijing 100081, China
2
Jianglu Machinery and Electronics Group Co., Ltd., Xiangtan 411100, China
3
School of Material Science and Engineering, Xiangtan University, Xiangtan 411100, China
*
Author to whom correspondence should be addressed.
Academic Editor: Francesca Borgioli
Metals 2021, 11(12), 1940; https://doi.org/10.3390/met11121940
Received: 20 October 2021 / Revised: 26 November 2021 / Accepted: 27 November 2021 / Published: 30 November 2021
The effects of cryogenic treatment and low temperature tempering on the microstructure, mechanical properties and distortion of the 20Cr2Ni4A and 17Cr2Ni2MoVNb carburized gear steels were investigated. The results showed that the case hardness of the experimental steels was increased after the cryogenic treatment, due to the decrease of the retained austenite content and the precipitation of the tiny carbides. The wear resistance of the two steels after cryogenic treatment was improved, although the wear mechanisms were different for 17Cr2Ni2MoVNb and 20Cr2Ni4A steels. The distortion of the Navy C-ring specimens underwent shrinkage before expansion during the cryogenic process, and the distortion of 17Cr2Ni2MoVNb steel was smaller than that of 20Cr2Ni4A steel. View Full-Text
Keywords: gear steel; cryogenic treatment; carburizing; retained austenite; wear gear steel; cryogenic treatment; carburizing; retained austenite; wear
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MDPI and ACS Style

Yan, Y.; Liu, K.; Luo, Z.; Wang, M.; Wang, X. Effect of Cryogenic Treatment on Microstructure, Mechanical Properties and Distortion of Carburized Gear Steels. Metals 2021, 11, 1940. https://doi.org/10.3390/met11121940

AMA Style

Yan Y, Liu K, Luo Z, Wang M, Wang X. Effect of Cryogenic Treatment on Microstructure, Mechanical Properties and Distortion of Carburized Gear Steels. Metals. 2021; 11(12):1940. https://doi.org/10.3390/met11121940

Chicago/Turabian Style

Yan, Yongming, Ke Liu, Zixiang Luo, Maoqiu Wang, and Xinming Wang. 2021. "Effect of Cryogenic Treatment on Microstructure, Mechanical Properties and Distortion of Carburized Gear Steels" Metals 11, no. 12: 1940. https://doi.org/10.3390/met11121940

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