Microhardness and Wear Resistance of Laser Strengthened Electroless Composite Plating NiAl/nanoAl203 Coatings
NiAl/nanoAl2O3 composite coatings were prepared on medium carbon steel substrates by electroless plating. The transverse-flow CO2 laser was employed for strengthening the coatings at various scan velocities and power densities. The composition, microstructure and wear resistance of the coatings were characterized by energy dispersive X-raysectrum (EDS), scanning electron microscopy (SEM), X-ray diffraction (XRD), HDX100 microhardness tester and friction and wear test (ball-on-disk). The effects of process parameters on microstructure and wear resistance of the coatings were investigated. It was found that based on high laser power, fast scanning velocity and large beam diameter, Ni0.77Al Fe0.23 intermetallics was synthesized in the coating. The microhardness of the coatings increased obviously for the phase transformation hardening. The friction coefficient and wear loss obviously decreased after laser strengthening.
laser strengthening electroless composite plating nickel aluminide microstructure wear resistance
DING Qing-ming YAO Jian-hua KONG Fan-zhi LUO Fang
Key Laboratory of Special Purpose Equipment and Advanced Processing Technology (Zhejiang University of Technology),Ministry of Education,Research Center of Laser Processing Technology and Engineering,College of Mechanical Engineering,Zhejiang University o
国际会议
The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)
北京
英文
557-561
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）