摘要
采用激光熔覆技术基于压片预置式法在高温合金基体上制备NiCoCrAlY熔覆涂层,分析讨论粉末压片冷等静压处理对其熔覆涂层结合界面的影响。研究表明,粉末压片冷等静压处理后熔覆试样的宏观形貌更加完整连续,同时能够改善熔覆涂层与基体结合界面间的裂纹现象。对其机理进一步分析可知:冷等静压处理后的粉末压片的厚度变薄,致密度增加,熔覆所需要的激光比能增加,从而提高了熔覆层结合界面的质量。
Based on the method of squashing presetting on the high temperature alloy to prepare NiCoCrAIY coating by laser cladding, the influence of squashing treated by cold isostatic pressing on the bonding interface is discussed. The research shows that macroscopic morphology of layers with pretreatment is complete and continuous and the phenomena of cracks in the coating interface are eliminated or reduced. With further study of mechanism, it is found that the thickness of the squashing decreased while the density and laser specific energy required for laser cladding increase, which are beneficial to the quality of interracial morphologies of laser cladding.
出处
《激光与光电子学进展》
CSCD
北大核心
2013年第11期125-129,共5页
Laser & Optoelectronics Progress
基金
航空科学基金(2010ZE52056)
江苏省精密与微细制造技术重点实验室基金
江苏省自然科学基金(BK2011479)
关键词
激光技术
激光熔覆
冷等静压
高温合金
结合界面
laser techniques laser claddings cold isostatic pressings high temperature alloys bondin interface
作者简介
许瑞华(1988-),女,硕士研究生,主要从事涂层及功能表面方面的研究。E—mail:xuruihuahappy@163.com
导师简介:黎向锋(1971-),女,教授,博士生导师,主要从事表面工程、智能加工、精密加工及生物制造等方面研究。E—mail:fxli@nuaa.edu.cn(通信联系人)