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Acta Metall Sin  2006, Vol. 42 Issue (11): 1197-1201     DOI:
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Effects of TiC Films on the Rolling Contact Fatigue Life and Mechanical Properties of Bearing Steel
LIU Hongxi; WANG Langping; WANG Xiaofeng; HUANG Lei; TANG Baoyin
State Key Laboratory of Advanced Welding Production Technology;Harbin Institute of Technology; Harbin 150001
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LIU Hongxi; WANG Langping; WANG Xiaofeng; HUANG Lei; TANG Baoyin. Effects of TiC Films on the Rolling Contact Fatigue Life and Mechanical Properties of Bearing Steel. Acta Metall Sin, 2006, 42(11): 1197-1201 .

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Abstract  ABSTRACT Titanium carbide (TiC) film is synthesized by plasma immersion ion implantation and deposition (PIII&D) technique on AISI52100 bearing steel surface. Testing include plan-view optical microscopy (OM), X-ray diffraction (XRD), friction and wear behaviors, rolling contact fatigue life and nanoindentation measurements. XRD patterns show that titanium carbide phase is formed in the film, and the microhardness of treated samples is higher than that of substrate. Rolling contact fatigue failure tracks were observed and analysised using conventional light microscope. Coated rolling elements failed in Surface wear or adhesive delamination, or a combination of these two modes depending upon the substrate bias voltage, implanted pulse width, treatment time and surface roughness. Results indicate that the maximum RCF life of the treated sample prolong by 5.5 times at a Hertzian stress level of 5.1GPa and 90% confidence level, respectively. Comparison with the substrate, the maximum microhardness and elastic modulus of treated specimen is increased by 28.4% and 12.1%, respectively. The friction coefficient decreased from 0.95 to 0.15 under identical wear conditions. This remarkable fatigue performance appears to be due to a combination of improved microstructure, adhesion, hardness and surface topography. Therefore, the PIII&D is regarded as one of promising technologies for improving the RCF life and mechanical properties of bearing.
Key words:  plasma immersion ion implantation and deposition      Titanium carbide film      Rolling contact fatigue (RCF)     
Received:  31 December 2005     
ZTFLH:  TG172.44  

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https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2006/V42/I11/1197

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[1] LIU Hongxi; JIANG Yehua; ZHOU Rong; ZHOU Rongfeng; JIN Qinglin TANG Baoyin. ROLLING CONTACT FATIGUE LIFE AND MECHANICAL PROPERTY OF TiN FILM FABRICATED BY PLASMA IMMERSION ION IMPLANTATION[J]. 金属学报, 2008, 44(3): 325-330 .
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