中文摘要：

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。

英文摘要：

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.