热处理对热喷涂层接触疲劳性能和寿命影响的研究现状  

Influence of Heat-treatment on Contact Fatigue Property and Life of Thermal Sprayed Coatings:A Review

作　　者：杨秀从 李国禄[1] 王海斗[2] 康嘉杰[3] 

机构地区：[1]河北工业大学材料科学与工程学院,天津300130 [2]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072 [3]中国地质大学(北京)工程技术学院,北京100083

出　　处：《材料导报》2016年第7期96-101,126,共7页Materials Reports

基　　金：国家自然科学基金(51275151);国家973计划(2011CB013405);国家杰出青年科学基金(51125023)

摘　　要：热喷涂层由于其形成过程的特殊性,致使其内部不可避免地出现一些裂纹、孔隙等微观缺陷,对涂层的接触疲劳性能以及使用寿命产生了恶劣影响,因此极大限制了其应用及发展。热处理不但可以改善涂层表面完整性,而且还能提高其滚动接触疲劳性能和使用寿命。较全面地分析比较了重熔、化学热处理、热等静压等工艺的不同,综述了各工艺对涂层接触疲劳性能和寿命演变规律的影响,并展望了其未来的研究及发展方向,以期为涂层的接触疲劳寿命预测提供一定的理论支持和技术指导。Micro-defects, inevitable in the thermal sprayed coating, extremely influenced its fatigue failure property and service life, due to the unique forming process. Therefore, the further application and development of thermal sprayed coatings is highly limited. Heat-treatment can improve the surface integrity, contact property and service life. The difference among remelting, thermal-chemical treatment and hot isostatic pressing is discussed in detail and the influence of these three post-treatment technologies on contact fatigue mechanism and life evolution law is comprehensively analyzed. Moreover, the application prospects of the technique is proposed for the purpose of providing theory and guidance for life prediction of contact fatigue.

关 键 词：热处理 热喷涂层 接触疲劳 疲劳寿命 微缺陷 

分 类 号：TG174[金属学及工艺—金属表面处理]