Microstructures and properties of Ni-based alloy cladding coating by high-energy pulsed like-laser
ZHANG Song
LI Dan
CUI Wen-dong
TAN Jun-zhe
GUAN Meng
Abstract：In order to improve the comprehensive surface properties of 304 stainless steel, the Ni-based alloy cladding coating was prepared on the surface of 304 stainless steel with the high-energy pulsed like-laser deposition technology.The microstructure, phase constituent, wear resistance and electrochemical corrosion performance of Ni-based alloy cladding coating were studied with scanning electron microscope (SEM), energy dispersive spectroscope (EDS), X ray diffractometer (XRD), pin-disk wear tester and electrochemical test system.The results show that the Ni-based alloy cladding coating has good metallurgical bonding to 304 stainless steel, and the relative wear resistance of Ni-based alloy cladding coating is 4.4 times high as that of 304 stainless steel.The microstructure of Ni-based cladding coating is composed of γ-Ni matrix phase, Ni3Mo, Fe7Mo3 and Cr23C6 butterfly-like hard reinforcing phases and irregular rod-like hard reinforcing phase.The hard reinforcing phases are the key reason for improving the wear resistance.The electrode potential difference between the hard reinforcing phases and matrix phase is the main reason for the increase of corrosion current density.
Keywords：high-energy pulsed like-lasercladdingNi-based alloymicrostructural morphologymicrohardnesswearelectrochemical corrosionpolarization curve
Publication Date：2017-03-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 132-136 )