德国毛塞·威尔克公司对利用激光束熔化铸铁凸轮轴并使其冷却淬硬的新技术作了深入研究。该项新技术原理是:先把激光束聚焦到凸轮轴的母线上,在工件转1转时,熔化其表面,深度为0.7～0.8mm,然后再使工件冷却,工件上的熔化区就凝固成硬度达HV_(0.5) 575的细颗粒莱氏体显微组织,再经磨削去除余量0.2～0.3mm,最后得到0.5mm深度的莱氏体层,从而显著地增加其耐磨性。采用此项新技术需要有一 Maoise Wilk, Germany, made in-depth research on the new technology of melting the cast iron camshafts with a laser beam and cooling and hardening them. The new technology principle is: First, the laser beam focused on the camshaft bus, turn the workpiece 1, the melting surface, the depth of 0.7 ~ 0.8mm, and then make the workpiece cooling, the workpiece on the solidification of the melting zone Into a hardness of HV_ (0.5) 575 fine grain ledeburite microstructure, and then grinding to remove the remaining 0.2 ~ 0.3mm, and finally get a depth of 0.5mm ledeburite layer, thereby significantly increasing the wear resistance. Need to use this new technology