激光熔覆原位合成Fe基Ti_2B金属陶瓷涂层组织与干滑动摩擦磨损性能  

Microstructure and Wear Properties Under Dry Sliding of Fe-based Ti_2B Metal-ceramic Coating by Laser Cladding

作　　者：刘安民[1] 钱书琨 汪新衡[1] 朱航生 

机构地区：[1]湖南工学院先进制造技术研究所,湖南衡阳421002 [2]湖南科技经贸职业学院,湖南衡阳421001 [3]衡阳丰顺车桥有限公司产品部,湖南衡阳421001

出　　处：《热加工工艺》2014年第2期128-130,134,共4页Hot Working Technology

基　　金：湖南省自然科学省市联合基金资助项目(13JJ9025);湖南工学院重点科研项目(HGZ0601)

摘　　要：采用CO2横流激光器在Q235钢表面熔覆制备了原位合成Ti2B/Fe金属陶瓷复合涂层,对熔覆层进行了显微组织观察、XRD分析以及室温下的干滑动摩擦磨损试验。结果表明,Fe基Ti2B金属陶瓷增强熔覆层组织细小、致密、无缺陷,Ti2B颗粒增强相同基体之间结合良好。室温下熔覆层的磨损主要为显微切削和硬质相的剥落,干摩擦磨损性能优良。Abstract：The in-situ synthesized Fe-based Ti2B metal-ceramic composite coating on the surface of Q235 steel was prepared by agreat power CO2 laser, the microstructure of the coating layer was observed by XRD. The dry friction and wear properties under room-temperature were checked. The results show that the microstructure of Fe-based Ti2B metal-ceramics coating layer is free, compact and has no defects. Clean bonding interface is formed between Ti2B particles and matrix. Micro- cutting and hard phase peeling are the main wear mode at room temperature, and dry sliding wear of Fe-based Ti2B metal-ceramics coating are excellent.

关 键 词：激光熔覆 原位合成 显微组织 物相组成 干摩擦磨损 

分 类 号：TG174[金属学及工艺—金属表面处理]