摘要
在已经过常规淬火的GCr15轴承钢表面,利用脉冲Nd:YAG激光进行了B4C粉末硼化改性处理。采用扫描电子显微镜、X射线衍射仪、显微硬度仪及摩擦磨损试验仪器对激光硼化处理后改性层的显微组织及性能进行了研究。结果表明:激光硼化改性层由树枝晶的FeB、Fe2B和基体组成,改性层的表面硬度高达HV1560,相比处理前硬度提高了81.8%,硬化层深度约为150μm,磨损率相比处理前降低了67.55%,激光硼化后GCr15钢表面的硬度和耐磨性能显著提高。
The GCr15 steel was surface modified first by conventional quenching with B4C powder,and then by pulsed Nd：YAG laser boridization.The impacts of the surface modified conditions on the properties were evaluated.The microstructures and mechanical properties of the modified surfaces were characterized with X-ray diffraction,scanning electron microscopy,and conventional mechanical probes.The dendrites of FeB and Fe2B were found to dominate the boridized coating.The results show that the newly-developed laser boridization technique significantly improves the mechanical properties of the GCr15 steel surfaces,including surface hardness and wear resistance.For example,as compared with the control sample,its surface hardness,up to HV1560,increased by 81.8%,with a hardened depth of 150 μm;and its wear rate decreased by 67.55%.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2013年第8期823-825,共3页
Chinese Journal of Vacuum Science and Technology
关键词
激光硼化
硬度
硬化层深度
耐磨性
Laser boriding
Hardness
The depth of hardened layer
Abradability
