Laser clad NiCrBSi alloy wear-resistance coating with RE addition on heavy duty spur gear flank

2017 International Conference on Structural, Mechanical and Materials Engineering

材料科学;力学

Zhao, N.^1,2 ; Tao, L.^1,2 ; Guo, H.^1,2 ; Zhang, M.Q.^1,2

School of Mechatronics, Northwestern Polytechnical University, Xi'an

710072, China^1

Shaanxi Engineering Laboratory for Transmissions and Controls, Xi'an

710072, China^2

关键词: Comprehensive properties;    Heavy duty gears;    Operating parameters;    RE additions;    Tribometers;    Wear behaviors;    Wear resistance coatings;    Wear volume loss;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/248/1/012016/pdf
DOI  :  10.1088/1757-899X/248/1/012016

来源: IOP

【 摘 要 】

In this research the wear-resistance composite coating successfully produced on heavy duty gear work surface by laser was reported. The coating containing 99 wt.% NiCrBSi alloy and 1 wt.% RE (rare earth element) oxidation powder. The RE addition coupled with laser operating parameters optimization caused elimination of both cracks and pores meanwhile further enhanced comprehensive properties of the laser layer. The coating microhardness, microstructure, phase construction and wear behaviors were tested by hardness tester, SEM equipped with EDS, XRD and tribometer, respectively. The results reflected the fact that the RE addition enhanced the coating ability of wear resistance and laser clad layer properly bonded with the gear flank. The wear volume loss rate of coating was half of that of the gear flank metal the COF curve of coating kept bellow that of the gear flank steel.