A Study of Surface Hardening Based on Creep-Feed Wet Grinding

Grind-hardening of non-quenched steel was performed with creep feed grinding mode and different cooling conditions.Microstructure and properties of the surface hardened layer were compared.The results show that more satisfactory hardened layer could be acquired through an appropriately chosen grinding conditions adopting creep-feed wet grinding.Compared with results through dry grinding,the surface hardened layer through wet grinding has the same martensite structure and changing trend,but its martensitic gradient is steeper under the action of coolant.The residual compression stress and wear resistance of the hardened layer after wet grinding are improved.Also the depth of the hardened layer and the entirely hardened area is reduced.The procedure can find applications in the field of grinding and metal surface modification.