试验采用４２ＭｎＣｒ５２与２９ＣｒＭｏ４４两种钢管环，用进口Ｖｍ４８淬火油与ＤＬ－１６国产淬火油分别在沿 温４０、８０℃条件下进行淬火，测量钢管环心培与表面的ＨＲＣ值，并对２９ＣｒＭｏ４４在油温４０℃和８０℃条件下......

The effects of laser hardening parameters such as beam power, beam diameter and scanning rate on microstructureand hardn......