1) normalizing of steel
The normalizing of steel heats the steel under normal circumstances. The temperature near the boundary is above Ac1 and Accm. After holding some time, the air is cooled. Because the cooling is relatively fast, in comparison to the annealing organization, pearlite in the organization to compare between the layers and it is relatively fine, so the performance is very good change, after refinement of the grain. In good organization, eliminate the residual stress. In the low carbon steel is, in the future can enhance the hardness of normalizing processing, also can improve the cutting or cutting, in order to improve the surface smoothness of the parts in the above; however, for high carbon steel, then normalizing can solve the cementite network, in order to the next step of annealing is ready for quenching.

2) quenching of steel
In the steel was quenched when under normal circumstances will steel heated to temperatures above Ac1, near the border of the Accm line, in the insulation for a period of time, finally put a different cooling medium for rapid cooling, so you can get hold of martensite high strength and high wear resistance.