在700℃下对强韧化处理(淬火-中温回火)后的65Mn钢进行了低温稀土硼共渗处理,研究了其表面渗层的微观形貌、耐磨性和耐蚀性,并与850℃下常规渗硼后再进行同样强韧化处理的65Mn钢进行了对比。结果表明:相对于常规渗硼后再进行强韧化处理而言,对65Mn钢先进行强韧化处理再进行低温稀土硼共渗处理所获得的渗层组织更加均匀致密,且未见常规渗硼后再进行强韧化处理所存在的表层及界面区疏松现象;同时,所获渗层在相同实验条件下的耐磨性和耐蚀性均得到明显提高,其体积磨损量仅为常规渗硼后再进行强韧化处理的17.86%,且无论在表面还是界面均未见腐蚀痕迹。 The microstructure, wear resistance and corrosion resistance of 65Mn steel after strengthening and toughening (quenching - tempering) at 700 ℃ were studied. Conventional boronizing at 850 ℃ followed by the same toughness of the 65Mn steel were compared. The results show that compared with conventional boronizing followed by strengthening and toughening treatment, the microstructure of the infiltrated layer obtained by strengthening and toughening of 65Mn steel and then boron-penetrating with low temperature rare earth is more uniform and dense, and no conventional seepage is found Boron and then toughening the existence of the surface layer and the interface area loosening; the same time, the obtained layer under the same experimental conditions wear resistance and corrosion resistance have been significantly improved, the volume of wear is only conventional seepage Boron and then toughening treatment of 17.86%, and no surface or interface corrosion marks.