电磁搅拌对激光熔覆WC-Co基合金涂层的组织结构和硬度的影响及机理研究  

Studies of the Effects and Mechanism of Electromagnetic Stirring on the Microstructures and Hardness of Laser Cladding WC-Co Based Alloy Coating

作　　者：余本海[1] 胡雪惠[1] 吴玉娥[1] 杨东升[1] 

机构地区：[1]信阳师范学院物理电子工程学院,河南信阳464000

出　　处：《中国激光》2010年第10期2672-2677,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(60777012);河南省2008科技计划项目(082300410050)资助课题

摘　　要：采用自制电磁搅拌装置研究了电磁搅拌对激光熔覆WC-Co基硬质合金组织的影响。实验与理论分析均表明,电磁搅拌能够使激光熔覆层的组织晶粒细化、分布更均匀,并能够消除熔覆层内的气孔和裂缝,提高熔覆层质量。还研究了不同强度的电磁搅拌对熔覆层显微硬度的影响,结果表明,随着电磁搅拌强度的增加,激光熔覆层显微硬度相应提高。Effects of electromagnetic stirring on the microstructures of the laser cladding WC-CO based layers are studied.Both experimental and theoretical analysis indicate that the microstructures of the laser cladding layers under electromagnetic stirring are much finer and more uniform than those without electromagnetic stirring.High qualitative layers which are free of porosity and cracks are obtained from the laser cladding with electromagnetic stirring.The influences of different electromagnetic stirring strengths on the hardness of the laser cladding layers are also investigated.The results show that the hardness increases correspondly with the increase of the electromagnetic stirring strength.

关 键 词：激光技术 激光熔覆 电磁搅拌 显微组织 裂纹 显微硬度 

分 类 号：TN249[电子电信—物理电子学] TG665[金属学及工艺—金属切削加工及机床]