Microstructures of Infiltrated Layer and Friction Properties of Low-Carbon Cr-Ni-Mo Bearing Steel during Duplex Surface Finishing Process

Abstract:

The carburizing behavior of low-carbon Cr-Ni-Mo, the nitriding behavior of C-Cr-W bearing steel and the carburizing process prior to nitriding of low-carbon Cr-Ni-Mo bearing steel were mainly investigated in this paper through the contrastive analysis of microstructures and properties by employing scanning electron microscope (SEM), transmission electron microscope (TEM) and X-Ray Diffraction XRD, etc. The result indicated that compared to the simple carburizing and nitriding process, the material that experienced the duplex surface finishing process could obtain a good infiltrated layer’s microstructure and excellent mechanical properties. The thickness of infiltrated layer was 1.8mm. The hardness of surface could reach 1100HV, and the infiltrated layer had a reasonable hardness gradient distribution. Meanwhile the test materials through duplex surface finishing process exhibited good friction properties in the aspect of point contact in dry friction.

• Periodical: Materials Science Forum (Volume 788)
• Pages: 317-322
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.788.317
• Online since: April 2014
• Authors: Chuan Xu*, Mao Sheng Yang, Ai Qiong Ma, Shan Ju Zheng
• Keywords: Bearing Steel, Duplex Surface Finishing Process, Friction Properties, Microstructure

References

[1] Gu Chengqing, Luo Qiwen, Lu Zhengxin, Transactions of metal heat treatment. 19 (1998)26-30.

[2] D.P.DAVIES, Heat Treatment of Metals. 4p( 1991)97-104.

[3] Zhong Shunsi,etc: Bearing steels(Metallurgical Industry Press, China 2000).

[4] A.BLOYCE, Y.SUN, X.Y.Li, Heat Treatment of Metals.2p (1999) 37-41.

[5] C.Gu,et al, Heat Treatment. 7 (1989) 87-92.