Enhanced wear property of magnesium alloy with Al+SiC coating by laser cladding

被引：0

作者：

Zheng, Biju ^{[1
]}

Hu, Wen ^{[1
]}

机构：

[1] Faculty of Materials Science and Engineering, Kunming University of Science and Technology

来源：

Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2014年 / 26卷 / 05期

关键词：

Laser cladding; Laser technology; Magnesium alloys; Microhardness; Wear resistance;

D O I：

10.11884/HPLPB201426.059003

中图分类号：

学科分类号：

摘要：

Al+SiC powders were pulse-laser (Nd-YAG) cladded on AZ91D magnesium alloy. The microstructure, chemical composition and phase analyses of the cladding layer were studied by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) analysis, and X-ray diffraction (XRD) measurement. It can be seen that the composite coating is mainly composed of SiC and β-Mg17Al12 phases, and as well as metal phases of Mg and Al. The laser cladding showed very good bonding with the magnesium alloy substrate. It was found that with increasing SiC mass fraction, the spacing of the dendritic and cellular structure became larger. The surface hardness of cladding coating is higher than that of substrate, and the increase of SiC mass fraction can increase the surface hardness as the coating with 40% SiC particles shows a maximum hardness of about 180 HV, while that of 10% SiC particles is 136 HV. Sliding wear tests conducted in a pin-on-disc wear testing apparatus showed that the composite coating with SiC particles and in situ synthesized Mg17Al12 phase remarkably improved the wear resistance of the AZ91D magnesium alloy. The wear volume loss shows a decrease as the mass fraction of SiC increases from 10% to 30%, the coatings with about 20% to 30% SiC exhibit the best wear resistance.

引用

共 18 条

[1]

Ma A., Jiang J.H., Saito N., Et al., Improving both strength and ductility of a Mg alloy through a large number of ECAP passes, Materials Science and Engineering: A, 513, 7, pp. 122-127, (2009)

[2]

Wu H.Y., Hsu C.C., Won J.B., Et al., Effect of heat treatment on the microstructure and mechanical properties of the consolidated Mg alloy AZ91D machined chips, Journal of Materials Processing Technology, 209, 8, pp. 4194-4200, (2009)

[3]

Yue T.M., Li T., Laser cladding of Ni/Cu/Al functionally graded coating on magnesium substrate, Surface and Coatings Technology, 202, 13, pp. 3043-3048, (2008)

[4]

Majumdar J.D., Chandra B.R., Mordike B.L., Laser surface engineering of a magnesium alloy with Al+Al2O3, Surface and Coatings Technology, 179, 2, pp. 297-305, (2004)

[5]

Hazra M., Mondal A.K., Kumar S., Et al., Laser surface cladding of MRI 153M magnesium alloy with (Al+Al2O3), Surface and Coatings Technology, 203, 5, pp. 2292-2299, (2009)

[6]

Yao J., Sun G.P., Liu C., Et al., Characterization and wear resistance of laser surface cladding AZ91D alloy with Al+Al2O3, Journal of Materials Science, 42, 10, pp. 3607-3612, (2007)

[7]

Yang Y., Wu H., Improving the wear resistance of AZ91D magnesium alloys by laser cladding with Al-Si powders, Materials Letters, 63, 1, pp. 19-21, (2009)

[8]

Gao Y.L., Wang C.S., Broad-beam laser cladding of Al-Si alloy coating on AZ91HP magnesium alloy, Surface and Coatings Technology, 201, 6, pp. 2701-2706, (2006)

[9]

Li G., Zou Y., Zou Z., Et al., In situ synthesis of Nb(C, N) ceramic particles reinforced Fe based composite coatings by laser cladding, High Power Laser and Particle Beams, 24, 11, pp. 2735-2740, (2012)

[10]

Zhang Y.K., Chen J.F., Lei W.N., Et al., Effect of laser surface melting on friction and wear behavior of AM50 magnesium alloy, Surface and Coatings Technology, 202, 14, pp. 3175-3179, (2008)

← 1 2 →