镍包WC增强镍铬基合金涂层的组织性能研究  

Study on the Microstructure and Properties of Nickel⁃Coated WC Reinforced Nickel⁃Chromium⁃Based Alloy Coatings

作　　者：潘晓磊 肖峰 郭岩 汤扣军 王晶 蔡龙海 王光乐 熊宗群 PAN Xiaolei;XIAO Feng;GUO Yan;TANG Koujun;WANG Jing;CAI Longhai;WANG Guangle;XIONG Zongqun(Shanghai Huadian Fengxian Thermal Power Co.,Ltd.,Shanghai 201499,China;Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou 310030,China)

机构地区：[1]上海华电奉贤热电有限公司,上海201499 [2]华电电力科学研究院有限公司,浙江杭州310030

出　　处：《材料保护》2025年第2期117-122,共6页Materials Protection

基　　金：中国华电集团科技项目(CHDKJ24-04-02-57)。

摘　　要：为提高0Cr17Ni4Cu4Nb钢的表面显微硬度、冲击性能和耐水蚀性能,以镍铬基合金粉末和镍包WC粉的混合物为原料,采用激光熔覆技术在0Cr17Ni4Cu4Nb钢表面制备含镍包WC镍铬基合金涂层,研究不同激光功率对涂层的显微组织、物相组成、显微硬度、冲击性能和水蚀性能的影响。结果表明:镍包WC增强涂层的组织致密,物相为NiCr固溶体、Cr_(23)C_(6)、Fe_(3)W_(3)C、Fe_(6)W_(6)C和WC;随着激光功率的增大,涂层组织细化,显微硬度、冲击吸收能量和耐水蚀性能同步提高;当激光功率为1 500 W时,涂层组织细化最明显,显示出高硬度、高韧性和耐水蚀性能,涂层硬度达801 HV_(0.3)、冲击吸收能量为60.2 J、水蚀失重质量0.106 g,表明在1 500 W下制备的涂层的综合性能优于其他涂层和基材。In order to improve the microhardness, impact performance, and water erosion resistance of 0Cr17Ni4Cu4Nb steel, a nickel ⁃chromium⁃based alloy coating containing nickel⁃coated WC was prepared on 0Cr17Ni4Cu4Nb steel surface using laser cladding technology. Amixture of nickel⁃chromium⁃based alloy powder and nickel⁃coated WC powder was used as the material. The effects of different laser powers onthe microstructure, phase composition, microhardness, impact performance and water erosion resistance of the coating were investigated.Results showed that the microstructure of the nickel⁃coated WC reinforced coating was dense, and the phases included NiCr solid solution,Cr_(23)C_(6), Fe_(3)W_(3)C, Fe_(6)W_(6)C, and WC. As the laser power increased, the coating's microstructure was refined, and the microhardness, impactabsorbed energy, and water erosion resistance were enhanced simultaneously. When the laser power was 1 500 W, the microstructure refine⁃ment was most pronounced, showing high hardness, toughness, and water erosion resistance. The coating achieved a hardness of 801 HV_(0.3),impact absorbed energy of 60.2 J, and a weight loss due to water erosion of 0.106 g. These results demonstrated that the coating prepared at1 500 W exhibited superior overall performance compared to other coatings and the substrate.

关 键 词：激光熔覆 镍铬基合金涂层 镍包WC粉 物相组成 显微硬度 冲击吸收能量 水蚀 

分 类 号：TG174.44[金属学及工艺—金属表面处理]