Effect of annealing temperature on microstructure of 20MnSi steel processed by equal channel angular pressing;

20MnSi steel was successfully processed by equal channel angular pressing(ECAP) of four passes with route C at room temperature,and the influences of ECAP pass on microstructures and mechanical properties were examined.

The effects of Nb on the austenization and static recrystallization behavior of 20MnSi steel are investigatedThe grain growth behavior is researched through austenite grain growth experimentsThe heat simulation experiments on static recrystallization are carried out with the Gleeble-1500 machineThe influence rules of Nb on 20MnSi steel static recrystallization are obtained

This paper analyses the cause of early fracture of 20MnSi bars in tensile test by the methods of metallographic and scanning electron microscopes.

The bending strength of 20MnSi reinforced bar were measured, the effect factors were analysed, and the measures to improve proposed.

The model of static recrystallization of 20MnSi steel and its application in hot continuous rolling of bars;

The practice of production 460MPa reinforced bar by remained heat treated 20MnSi;