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research-article

Effect of niobium on the dry sliding friction and wear properties of 100Cr6 bearing steel

[+] Author and Article Information
He GuoNing

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
heguoyouxiang@163.com

Zhou NingBo

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
13161889114@163.com

Zhang ChaoLei

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
zhangchaolei@ustb.edu.cn

Ba XinYu

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
18722618321@163.com

Liu YaZheng

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
lyzh_ustb@163.com

1Corresponding author.

ASME doi:10.1115/1.4040304 History: Received November 10, 2017; Revised May 08, 2018

Abstract

In this work, the dry sliding friction and wear properties were studied by wear test for 100Cr6 bearing steel when Nb content was 0.018% and 0.040%. In addition, in order to explain the differences, the experimental samples were processed for spheroidizing annealed and the quenched-tempered microstructure and hardness was analyzed. The result indicated that their friction coefficient were decreased to 0.047 when Nb content was 0.018% and the worn surface is micro-cutting and spalling without plowing. When Nb content was 0.040%, the friction coefficient were decreased to 0.006 and maximum wear depth was the deepest owing to obvious cutting. In order to increase the properties of the friction and wearing, Nb content should be decreased. With Nb content increased, the properties of the friction and wearing is decreased. The incorporation of Nb into bearing steel promotes the formation of martensite and carbide particles, which results in the diversity of the wear behaviors, eventually.

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