摘要
采用激光熔覆的方法在 5 5 Si2 Mn弹簧钢表面制备了 Co基 WC-Ti C-Ta C多元复合熔覆层 ,用扫描电镜 ( SEM)和电子探针分析了呈波纹表面的激光熔覆层的组织特性 ,发现由于各硬质合金物性的差别 ,熔覆区中出现亚层结构 ,研究表明熔覆区中的亚层结构是形成熔覆层中裂纹缺陷的主要原因。提出了通过电磁搅拌控制硬质相在熔覆层中分布 ,以提高熔覆涂层质量的理论构想。
Investigation on laser cladding of WC-TiC-TaC/Co based carbide on 55Si2Mn spring steel had been done. The properties of laser cladding layer had been analyzed by SEM and EPA. It is found that the cladding region of laser cladding layer consists of two sublayers, which is related to the physical properties of the cladding material. It shows the cracks in the laser cladding coating are mainly related to the sublayers structure. In order to enhance the quality of laser cladding layer the electromagnetic stirring method was put forward to make carbide particle phases distributed relatively uniformly in laser cladding layer.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2004年第1期83-85,共3页
China Mechanical Engineering
基金
国家自然科学基金资助项目 (50 2 710 2 8)
关键词
激光熔覆
硬质合金
亚层结构
裂纹
电磁搅拌
laser cladding
carbide
sublayer structure
crack
electromagnetic stirring
