In this paper, repeated quenching and tempering processing was used to not only refine the grain size and but also keep the microstructure as tempered sorbite. Good wear resistance is also desired to be obtained by the processing. 本文设计旨在既保留回火索氏体组织又能细化晶粒的多次调质热处理工艺,以期使其耐磨性得到提高。