Journal
SURFACE & COATINGS TECHNOLOGY
Volume 393, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2020.125807
Keywords
Laser cladding; Ni-Cu alloy; Wear property; Electrochemical corrosion
Funding
- National Key Research and Development Program of China [2017YFB1103604]
- industrial transformation and upgrading funds of Ministry of Industry and Information Technology [RZJC-XM19-004]
- Tianjin Municipal Special Program of Talents Development for Excellent Youth Scholars [TJTZJH-QNBJRC-2-15]
- National Natural Science Foundation of China [61475117]
- Scientific Research program of Tianjin Municipal Education Commission [2018KJ206]
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Ni-Cu/WC-12Co composite coatings with 0-30 wt% of WC-12Co were prepared by laser cladding. SEM, EDS, XRD were used to study the changes of microstructure and phase composition. The microhardness, wear and corrosion resistance performance of composite coatings were analyzed by the microhardness tester, wear tester and electrochemical workstation. The results show no cracks in the four composite coatings. With increasing WC-Co content, the microhardness of the composite coating increases. The formation of (Co, Cu) compounds and WC improves the wear resistance of composite coating significantly. When the proportion of WC-12Co is 20 wt %, the wear resistance of the composite coating is the best, and the wear rate is 10% of the Ni-Cu alloy. Moreover, the 30 wt% WC-12Co composite coating corrosion current density is 0.1 times of the Ni-Cu alloy in 3.5 wt% NaCl solution at room temperature.
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