Study on friction properties of the sintered steel parts treated by chromizing
Sintered steels were coated by chromizing in order to improve the tribological properties such as friction coefficients or wear resistance. Chromizing coating, Pack cementation, of the sintered steels was performed in the mixture powder of pure Cr (9.6 wt. ％), NH4Cl (4 wt. ％), and a-Al2O3 (86.4 wt. ％) as master alloy, activator, and inert filler respectively, at 950 ℃ during 10 hours. After chromizing, the friction coefficient of the sintered steel was decreased by 80％ in maximum at the condition of 5N, 50 mm/sec, compared with untreated one. For analyzing the reasons of lowered friction coefficient, we tried to observe the surface properties by using X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), and Atomic Force Microscope (AFM). As the results, chromium carbides and iron-chromium carbides formed like dimple morphology on the surface played key roles of decreasing friction coefficient of the sintered steel after chromizing.
alloys coating, wear atomic force microscopy (AFM) sintered steel
Yong-Jin Park Sang-Gweon Kim Jae-Hoon Lee Jung-Hyun Kong Masahiro Okumiya
Korea Institute of Industrial Technology (KITECH), Incheon, Korea Toyota Technological Institute, Nagoya, Japan
国际会议
北京
英文
390-391
2012-10-23（万方平台首次上网日期，不代表论文的发表时间）