Improving the Wear Resistance of AZ31B Magnesium Alloy by Laser Cladding with Al-Si+Al2O3-TiO2 Powders
To improve the wear resistance of magnesium alloy, the laser surface cladding of AZ31B magnesium alloy with Al-12 ％ Si and Al2O3 -40 ％ TiO2 composite powders (in the wt.％ ratio of 10:1, 6:1 and 4:1) were investigated by using a 5kW continuous wave CO2 laser. A detailed microstructure and phase analysis of the surface modified layer were studied by optics microscopy (OM), Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The microstructure of the surface modified layers mainly consist of Al-Mg matrix, dendrite precipitates and Al2O3, TiO2 ceramic particles. The microhardness of the surface layer were measured and wear resistance property were evaluated in details. The average microhardness of the surface layers was significantly improved to 250HV0.05 as compared with 50HV0.05 of the AZ31B substrate. The results showed that the wear resistance of the laser surface modified samples was considerably improved as compared as the as-received specimen.
az31b magnesium alloy laser cladding al-si+ al2o3-tio2 powders wear resistance
Z.Q.Cui W.X.Wang H.L Wu B.S.Xu
Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Tec Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Tec
国际会议
北京
英文
213-217
2010-10-25（万方平台首次上网日期，不代表论文的发表时间）