WC颗粒增强镍基喷焊涂层的显微组织与耐磨性  

Microstructure and Abrasive Resistance of WC Particles Reinforced Ni-Based Spray-Welding Coating

作　　者：刘兴保[1] 姚冠新[1] 高冬[1] 夏园[1] 

机构地区：[1]江苏大学材料科学与工程学院,镇江212013

出　　处：《机械工程材料》2011年第5期62-64,76,共4页Materials For Mechanical Engineering

摘　　要：采用氧乙炔火焰喷焊技术,在正火态45钢基体表面用镍包WC粉制备WC颗粒增强镍基喷焊涂层,采用SEM、XRD分析了涂层的显微组织和物相组成,讨论了WC含量对镍基喷焊涂层硬度、耐磨性的影响。结果表明:WC增强镍基喷焊涂层组织细小,喷焊涂层与基体形成了良好的冶金结合;喷焊涂层的硬度和耐磨性能随着WC含量增加均先升后降,当WC颗粒质量分数为35%左右时性能最佳,硬度达到1 250 HV,磨损量为0.06 g。WC particles reinforced Ni-based spray-welding coating were prepared using Ni-WC mixed powder on normalizing treatment 45 steel surface by oxyacetylene spray welding technique,the microstructure and chemical composition of the coating were analyzed by SEM and XRD,and the effect of WC content on the coating hardness and abrasive resistance were discussed.The results show that the microstructure of the coating was fine,and the metallurgic combine of the coating and matrix was well.The hardness and abrasive resistance of the coating showed an earlier raising and later decreasing with WC content.When WC content was around 35wt%,the mechanical properties were optimal： the hardness was 1 250 HV and abrasion quantity was 0.06 g.

关 键 词：喷焊涂层 耐磨性 镍基自熔性合金 WC颗粒 

分 类 号：TG174.442[金属学及工艺—金属表面处理]