B含量对激光熔覆组织性能的影响
Influence of B Content on Microstructure and Property of Laser Cladding Layer
王 毅, 李 宾
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作者单位：贵州交通职业技术学院, 贵州 贵阳 550003
中文关键字：激光熔覆； 组织； 硬度
英文关键字：laser cladding; microstructure; hardness
中文摘要：采用自配的合金粉末，对45钢进行激光熔覆处理。利用OM、XRD和显微硬度计对熔覆层的组织结构及硬度进行了研究。结果表明， B最佳含量为1.5%；熔覆层基体相为α-Fe，基体相上分布有析出的Fe5C2、Fe2B和FeSi等相，还有一定量的非晶组织，熔覆层平均硬度高达730 HV0.2。
英文摘要：The laser cladding treatment on 45 steel surface was carried out with self-made alloy powder. The microstructure and hardness were investigated with OM, XRD and hardness measurement. The results show that the optimum B content is about 1.5%. The matrix phase in the cladding coating is α-Fe, some phases such as Fe5C2, Fe2B, and FeSi distributes on the matrix. The average hardness is 730 HV0.2.