Surface Treatment of 45 Steels by Plasma Beam Alloying and Plasma Surface Quenching
Plasma beam is currently advisable and advantageous in surface modification for several reasons; for instants, high energy, portability and low cost. In this study, plasma beam was employed to deposit pre-paste, and also used for surface quenching. The results are shown that a uniformed harden layer free of crack and porosities with a thickness of 1.8-2.2mm can be produced by both two methods. After plasma beam alloying, the overlayer with obvious two interfaces can achieve a maximum hardness of 1100HV0.2. This improvement is the mainly contribution not only by land-like TiC reinforced particles and Fe2.5 Tio.5O4, a product of reaction between the pre-paste and molten matrix, with dispersive distribution at the surface, but also alloying elements enriched at the top of molten pool. The experiment suggested that the hardness of the surface was also highly affected by the parameters of plasma beam process alloying; namely, the higher velocity plasma beam moves and the more TiC particles contained, the higher hardness can be obtained. In contrast with the former process, after plasma surface quenching, the overlayer with one interface has a maximum hardness of 600HV0.2.
Plasma beam Plasma surface quenching TiC Metal matrix composite(MMC)
Kaiyuan Shi Shubing Hu Wen Xu Qiwen Huang
State Key Laboratory of Material Processing and Die & Mould Technology,Huazhong University of Science & Technology,Wuhan 430074,China
国际会议
2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)
重庆
英文
1109-1113
2010-09-17（万方平台首次上网日期，不代表论文的发表时间）