EFFECT OF ELECTROPULSING ON MECHANICALPROPERTIES OF A LOW CARBONMICROALLOY STEEL

Electropulsing was employed to treat a low carbon microalloy steel. The results show that the microstructure of the steel can be refined by the treatment and the mechanical properties can be improved. The refined microstructure has high thermo-stability, after heating at 400℃for 20h, no structural coarsening was observed. It is suggested that high heating rate, change of thermodynamic barrier during phase transformation and very short treating time are the main factors for the grain refinement.