Model of microstructure field of grinding metamorphic layer

Grinding generates metamorphic layer on the surface of workpiece whose microstructure has great influence on the mechanical property of wokpiece. In order to reveal the characteristic of the microstructure, the paper established the model of microstructure field of grinding metamorphic layer based on the grinding thermal field and Maynier cooling equation. The content and distribution of different microstructure of grinding can be obtained from the model intuitively. The model shows martensite mainly distributes in the surface layer and bainite distributes in the middle area of the grinding metamorphic layer. The thickness of martensite layer increases with the increasing of grinding depth and the thickness of bainite layer stay the same with the increasing of grinding depth.