The Structure and Mechanical Properties of Cr4Mo4V Steel Treated by PⅢ Carbonitriding
The composition and structure of PHI (plasma immersion ion implantation) carbonitrided Cr4Mo4V steel were analyzed using X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), optical microscopy (OM) and SEM. The results indicate that the nitride and carbide are dispersion phase precipitation and except formation of compound other implantation atoms dissolve into martensite matrix. The total concentration of carbon and nitrogen is about 30 at％ near the surface, and still keeps at about 20 at％ even at the depth of 8 μm. The effect of treatment temperature, implantation time and ratio of N2 to CH4 on the hardness and wear resistance of carbonitrided layer are investigated. It is found that the hardness of Cr4Mo4V steel increases after treatment. The highest hardness of samples is 22.3 GPa, which is about 1.8 times than initial steel. The dry-wear resistance of the samples is also improved after treatment, and the sample with higher hardness shows the better wear resistance.
Cr4Mo4V steel PBⅡ carbonitriding hardness wear resistance
Gu Le Li Zhongwen Tang Glangze Zhao Kangling Su Junping Ma Xinxin Ken Yukimura
Harbin Institute of Technology, Harbin 150001, China Harbin Institute of Technology, Harbin 150001, China Shanghai University of Engineering Science, Sha Harbin Bearing manufacturing Co. Ltd, Harbin 150001, China State Key Laboratory of Advanced Welding and joining, Harbin 150001, China
国际会议
西安
英文
176179
2011-05-11（万方平台首次上网日期，不代表论文的发表时间）