高熔点金属电弧喷涂制模涂层缺陷产生机理及控制  

Generation Mechanism and Control of Coating Defect of High Melting Point Metal Arc Spray Tooling

作　　者：仲成[1] 何仲赟[1] 魏润强[1] 池金春[1] 刘彬[1] 

机构地区：[1]西安交通大学快速制造国家工程研究中心

出　　处：《航空制造技术》2010年第12期94-99,共6页Aeronautical Manufacturing Technology

基　　金："十一五"国家科技支撑计划重点课题(2006BAF04B14)

摘　　要：在利用高熔点金属电弧喷涂技术制作快速模具的过程中,经常产生裂纹,分层剥离和胀起等缺陷,导致涂层缺陷的重要原因是涂层内残余应力。缺陷常发生在涂层最薄弱的位置。改变喷涂工艺,使涂层厚度尽量均匀,增加工艺补充,减少结构的应力集中,可以有效地减少或消除缺陷。In the forming process of high melting point metal arc spray tooling, defects usually appear, such as cracking, warping and swelling. Residual stress in high melting point metal coating is an important reason for coating defects. The position that easily produces defects is the weak part. Optimizing spraying process, adding binder surface or reducing stress concentration could effectively reduce and eliminate coating defects.

关 键 词：高熔点金属涂层 缺陷 残余应力 应力集中 

分 类 号：TG174.442[金属学及工艺—金属表面处理]