CAJ | 학술논문

论述了大功率半导体激光器在钢表面硬化技术中的应用。与CO2激光器相比，其波长更短，易被金属吸收，且加工过程稳定。采用自主研制的大功率半导体激光器对60Si2Mn线轧钢进行激光表面硬化处理，研究了沿不同加工方向硬化区的宏观形貌及相变层的组织、硬度特征。结果表明，60Si2Mn钢表面硬化层分为相变硬化层、过渡层和受热影响的基体组织，硬化层的显微组织明显细化，其表面硬度高达773~995 HV，比基体组织的硬度提高了120%。
논술료대공솔반도체격광기재강표면경화기술중적응용。여CO2격광기상비，기파장경단，역피금속흡수，차가공과정은정。채용자주연제적대공솔반도체격광기대60Si2Mn선알강진행격광표면경화처리，연구료연불동가공방향경화구적굉관형모급상변층적조직、경도특정。결과표명，60Si2Mn강표면경화층분위상변경화층、과도층화수열영향적기체조직，경화층적현미조직명현세화，기표면경도고체773~995 HV，비기체조직적경도제고료120%。
An experiment on high power diode laser transformation hardening for 60Si2Mn steel was carried out. The macro view of laser surface hardening along different axises were studied. The microstructure and hardness of hardened layer are analysised. The results show that the surface hardened layer consists of three zones,including the transformation hardening layer, transition zone and heat-affected zone. The microstructure of hardened layer is refined,its hardness can reach 773~995 HV,and is 120%higher than that of the base material.