超音速火焰喷涂TiC-TiB2增强Ni基涂层的研究  

Microstructure and Properties of TiC-TiB_2 Reinforced Ni-Based Coatings Prepared by High Velocity Oxygen Fuel Spraying

作　　者：王引真[1] 李方坡[2] 孙永兴[1] 高海军[1] 潘蛟亮[1] 

机构地区：[1]中国石油大学(华东)机电工程学院,山东东营257061 [2]中国石油天然气集团公司管材研究所,陕西西安710065

出　　处：《材料保护》2008年第6期8-10,3,共3页Materials Protection

基　　金：东营市科学技术发展计划基金项目(2005126);山东优秀中青年科学家奖励基金(02BS048)

摘　　要：利用超音速火焰喷涂技术在45号钢基体上制备了2种TiC-TiB2增强Ni基涂层,研究了涂层的组织和性能并与Ni60涂层进行对比分析。结果表明,含Ti-B4C自反应组元粉末的喷涂火焰呈明亮的白炽状态,火焰温度明显高于喷涂Ni60粉末的火焰温度,TiC-TiB2陶瓷增强Ni基涂层的显微硬度和耐滑动磨损性能明显优于Ni60涂层。Ti-B4C-Ni团聚态粉末形成的涂层中陶瓷相均匀分布在金属基体中,颗粒细小,在摩擦过程中不易脱落,有效提高了片层强度和硬度,增强了涂层的耐磨性。而Ti-B4C团聚态粉与Ni60机械混合粉末形成的涂层中出现了明显的金属相与陶瓷相的偏聚现象,使得涂层的结合性和耐磨性略有降低。Two types of nickel-based coatings reinforced with TiC-TiB2 were prepared on AISI-1045 steel substrate using high velocity oxygen fuel (HVOF) spray. The microstructure and properties of the coatings were investigated, using Ni60 coating as a reference. Results showed that the raw material powders containing Ti-B4C reaction ingredients had a much higher flame temperature than Ni60 powder, and the Ni-based coating reinforced with TiC-TiB2 had significantly higher microhardness and wear resistance than Ni60 coating. Moreover, TiC-TiB2 ceramics phase with fine grain size was uniformly distributed and well adhered in metallic matrix in the coating prepared from agglomerated TiC-TiB2-Ni raw material powders, contributing to enhancing the strength, hardness, and wear resistance of the coating. While in the coating prepared from the agglomerated powders of Ti-B4C mechanically mixed with Ni60 powders, the ceramics phase and metallic phase showed obvious segregation, leading to decreased adhesion strength and wear resistance of the coating as well.

关 键 词：超音速火焰喷涂 NI基涂层 TiC—TiB2 摩擦磨损 

分 类 号：TG174.442[金属学及工艺—金属表面处理]