中国激光, 2010, 37 (10): 2672, 网络出版: 2010-09-25
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
激光技术 激光熔覆 电磁搅拌 显微组织 裂纹 显微硬度 laser technique laser cladding electromagnetic stirring microstructure cracks hardness
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。
Abstract
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.
余本海, 胡雪惠, 吴玉娥, 杨东升. 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[J]. 中国激光, 2010, 37(10): 2672. Yu Benhai, Hu Xuehui, Wu Yu′e, Yang Dongsheng. Studies of the Effects and Mechanism of Electromagnetic Stirring on the Microstructures and Hardness of Laser Cladding WC-Co Based Alloy Coating[J]. Chinese Journal of Lasers, 2010, 37(10): 2672.