Effect of bond layers and vacuum annealing on sprayed NiCr-30%Cr3C2 metallic-ceramic coating properties
KE Peng1, CAI Fei1, HU Kai1, ZHANG Shi-hong1, WANG Shuo-yu2, ZHU Guang-hong2, NI Zhen-hang2, HU Xiao-hong2
1. Research Center of Modern Surface & Interface Engineering, Anhui University of Technology, Maanshan 243002, Anhui, China;
2. Anhui Ma Steel Surface Engineering Technology Co., Ltd., Maanshan 243000, Anhui, China
Abstract：NiCr-30%Cr3C2(mass fraction) ceramic-metallic coatings were sprayed with two types of bond layer (electro-deposited Ni+HVOF NiCr bond layer and electro-deposited Ni bond layer) by HVOF. The coating with Ni bond layer was vacuum annealed at different temperatures (800, 850℃ and 900℃). Phase, microstructure and mechanical properties under different loads of coatings were characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM), electron-tensile tester, ball-on-disk (BOD) and step profiler. The results show that the adhesion strength of the coat-ing with Ni bond layer reaches 64MPa and is improved obviously after annealing. The wear resistance of the coating with Ni bond layer is superior to that with Ni-NiCr bond layer and improved signific-antly under 20N loading, while the wear resistance of the two coatings is with no much difference and the wear resistance of the coating with Ni bond layer is decreased after annealing under 5N loading.
柯鹏, 蔡飞, 胡凯, 张世宏, 王硕煜, 朱广宏, 倪振航, 胡小红. 黏结层及真空退火对NiCr-30% Cr3C2金属-陶瓷喷涂层性能的影响[J]. 材料工程, 2019, 47(7): 144-150.
KE Peng, CAI Fei, HU Kai, ZHANG Shi-hong, WANG Shuo-yu, ZHU Guang-hong, NI Zhen-hang, HU Xiao-hong. Effect of bond layers and vacuum annealing on sprayed NiCr-30%Cr3C2 metallic-ceramic coating properties. Journal of Materials Engineering, 2019, 47(7): 144-150.
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2019, Vol. 47 
