Microstructure and Wear Properties of Cu-coated SiCp/Ni35 Coating by Laser Cladding

PAN Cheng-gang, WU Zhu, DING Zi-zheng, CHANG Qing-ming

Surface Technology ›› 2017, Vol. 46 ›› Issue (12) : 110-117.

PDF(15008 KB)
PDF(15008 KB)
Surface Technology ›› 2017, Vol. 46 ›› Issue (12) : 110-117. DOI: 10.16490/j.cnki.issn.1001-3660.2017.12.019
Surface Friction Wear and Lubrication

Microstructure and Wear Properties of Cu-coated SiCp/Ni35 Coating by Laser Cladding

  • PAN Cheng-gang, WU Zhu, DING Zi-zheng, CHANG Qing-ming
Author information +
History +

Abstract

The work aims to study microstructures, phases and friction mechanism at 25 ℃ and 600 ℃ of Cu-coated SiCp/Ni35 laser clad coating. The Cu-coated SiCp was prepared in the method of electroless plating, and the Cu-coated SiCp-reinforced N35 clad coating was prepared on H13 steel by laser cladding. Phase, microstructure and composition of the clad coating were analyzed with XRD, OM, SEM and EDS. Microhardness of the clad coating was tested with microharness tester, and wear resistances at room temperature and high temperature were tested by high temperature wear tester. The clad coating was composed of matrix phase γ-Ni(Fe) solid solution, reinforced phase M7C3, borides, silicide and graphite. Microhardness and friction property at room temperature of the clad coating are significantly higher than those of H13 steel, while wear resistance of the coating at high temperature has only a little increase than that of H13 steel. Cu coated SiCp can slow down the decomposition of SiCp in laser cladding process, but the decomposition rate is too high. High hardness carbide and silicide in the coating can improve wear resistance at room temperature. Dense oxide film forms on the surface of die steel at high temperature, which can reduce wear and friction; no dense oxide film forms on the clad coating at high temperature, which leads to lower wear resistance than that at room temperature.

Key words

laser cladding; Cu-coated SiCp; Ni35; wear

Cite this article

Download Citations
PAN Cheng-gang, WU Zhu, DING Zi-zheng, CHANG Qing-ming. Microstructure and Wear Properties of Cu-coated SiCp/Ni35 Coating by Laser Cladding[J]. Surface Technology. 2017, 46(12): 110-117

Funding

Supported by National Natural Science Foundation of China (51375353)
PDF(15008 KB)

Accesses

Citation

Detail

Sections
Recommended

/