Characteristics of clad layer of mixture of stellite-6 and tungsten carbide powder by means of single-pass laser cladding

XU Guojian; LIU Shuang; HANG Zhengxiang; YU Enhong; LI Yongbo; FAN Yongbo

doi:10.7510/jgjs.issn.1001-3806.2014.01.029

In order to improve the wear resistance of the clad layer, the powder mixture of stellite-6 and tungsten carbide (WC) in the range of 0~0.47 mass fraction of WC was deposited on mild steel plates by CO2 laser cladding system. The phase constitution, microstructure, hardness and wear resistance of the clad layer were studied with an X-ray diffractometer, energy dispersive spectroscopy, scanning electron microscope, laser microscope, Vickers hardness tester and wear tester. According to the analyzed results, the microstructure of the clad layer consists of hypoeutectic structure and undissolved tungsten carbides dispersed in the matrix of the Co-based alloy. The Vickers hardness increases with the increase of WC weight fraction. On the other hand, the crack sensitivity of the laser clad layer is low.

Characteristics of clad layer of mixture of stellite-6 and tungsten carbide powder by means of single-pass laser cladding

1. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China;

2. Shenyang Siasun Robot & Automation Co., Ltd., Shenyang 110168, China

Received Date: 2013-03-30

Accepted Date: 2013-06-13

Available Online: 2014-01-25

Abstract: In order to improve the wear resistance of the clad layer, the powder mixture of stellite-6 and tungsten carbide (WC) in the range of 0~0.47 mass fraction of WC was deposited on mild steel plates by CO2 laser cladding system. The phase constitution, microstructure, hardness and wear resistance of the clad layer were studied with an X-ray diffractometer, energy dispersive spectroscopy, scanning electron microscope, laser microscope, Vickers hardness tester and wear tester. According to the analyzed results, the microstructure of the clad layer consists of hypoeutectic structure and undissolved tungsten carbides dispersed in the matrix of the Co-based alloy. The Vickers hardness increases with the increase of WC weight fraction. On the other hand, the crack sensitivity of the laser clad layer is low.

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Reference (18)

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Characteristics of clad layer of mixture of stellite-6 and tungsten carbide powder by means of single-pass laser cladding

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