激光熔覆TiC增强镍基熔覆层的微观组织与耐磨性研究  

Microstructure and Wear Resistance of TiC Reinforced Ni-Based Coating by Laser Cladding

作　　者：王志东 张佳豪 王明静[2] 刘二勇 WANG Zhidong;ZHANG Jiahao;WANG Mingjing;LIU Eryong(Material Supply Department(Material Management Department)of PetroChina Changqing Oilfield Company,Xi′an 710016,Shaanxi,China;School of Materials Science and Engineering,Xi′an University of Science and Technology,Xi′an 710054,Shaanxi,China)

机构地区：[1]中国石油长庆油田分公司物资供应处(物资管理部),陕西西安710016 [2]西安科技大学材料科学与工程学院,陕西西安710054

出　　处：《矿冶工程》2023年第1期137-140,共4页Mining and Metallurgical Engineering

基　　金：陕西省重点研发计划项目(2021SF-469);国家自然科学基金(51705415)。

摘　　要：选择微纳尺度TiC为增强相、镍粉为基体粉,利用激光熔覆技术制备TiC增强镍基熔覆层,考察了TiC对熔覆层微观结构和耐磨性的影响。结果表明,镍基熔覆层组织以γ-Ni和TiC为主;高TiC含量时易引起熔覆层顶部TiC偏聚;随着TiC含量增加,熔覆层的硬度逐渐增大且表层硬度升高更为明显;三体磨损实验结果表明,复合熔覆层的耐磨性随着TiC含量升高而降低,表明冲击载荷下脆性增强相不利于提升熔覆层的耐磨性。With micro-nano TiC as reinforcing phase and nickel powder as matrix powder, a TiC reinforced Ni-based coating was fabricated by laser cladding technology, and the effect of TiC on microstructure and wear resistance of the coating was investigated. The results show that Ni-based coating has its microstructure predominately composed of γ-Ni and TiC, and a high content of TiC is prone to cause TiC segregation at the top of coating. With the increase of TiC content, coating will have its hardness increase gradually, especially have an obvious improvement in the surface hardness. A three-body wear test shows that the wear resistance of this composite coating decreases as TiC content increases, indicating that the brittle reinforcement phase is not conducive to improving wear resistance of the coating under impact load.

关 键 词：激光熔覆 镍基熔覆层 TIC 微观组织 耐磨性能 

分 类 号：TB302[一般工业技术—材料科学与工程]