Study on W-Mo-Y Multi-elements Alloying and Plasma Nitriding on Q235 Steel
Using plasma alloying technique, Q235 steel was firstly treated by W-Mo-Y Multi-elements alloying followed by plasma nitriding process. The effects of process parameters on alloying layer were studied. The structure, composition, phase and micro-hardness of alloying layer were analyzed by metalloscope, XRD, SEM and microhardness tester. Results show that the microstructure of W-Mo-Y alloying layer is columnar crystal, and W, Mo contents decrease from the outside to the inside. The element Y is distributed mainly at the grain boundaries. The phase of alloying layer consisted of Fe, Fe3Mo, Fe17Y2 and the solid solution of (W, Mo, Y) in α-Fe. After plasma nitriding process, the co-diffusion layer is strengthened and large amounts of nitrides form and dispersedly distribute in the alloying layer. The phase of alloying layer consist of Fe4N, Fe3Mo, Fe, MoN, Mo2N, W2N, WN. The average micro-hardness of alloying layer is 850HV0.05. And then the wear tests were conducted. Compared with untreated samples, the wear resistance of alloying layer is improved by 2 times under abrasive wear conditions.
alloying plasma nitriding Q235
Gao Yuan Li Bing Chen Xuannan Huang Xuefeng Zhang Wei Yuan Lin
School of Material Science and Engineering, Guilin Universityof Electronic Technology,Guilin541004, School of Material Science and Engineering, Guilin Universityof Electronic Technology, Guilin541004,
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
745-749
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）