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Effects of WC-Co reinforced Ni-based alloy by laser melting deposition: Wear resistance and corrosion resistance 下载免费PDF全文
WC-Co reinforced C276 alloy composite coatings are fabricated on Q235 steel by laser melting deposition.The microstructure,hardness,wear performance,and electrochemical corrosion behavior of composite coating are studied.The results show that WC-Co particles are mostly uniformly distributed in the coating and provide favorable conditions for heterogeneous nucleation.The microstructure of C276/WC-Co composite coatings is composed of γ-Ni solid solution dendrites and MoNi solid solution eutectics.The WC-Co particles can effectively improve the hardness and wear resistance of C276 alloy.The average hardness of the composite coating containing 10-wt% WC-Co(447 HV0.2) are 1.26 times higher than that of the C276 alloy(356 HV0.2).The wear rate of composite coating containing 10-wt% WC-Co(6.95 ×10-3 mg/m) is just 3.5% of that of C276 coating(196.23 × 10-3 mg/m).However,comparing with Hastelloy C276,the corrosion resistance of C276/WC-Co composite coating decreases. 相似文献
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