Abstract��Effect of quenching temperatures, tempering temperatures on strength, hardness, plasticity and impact toughness of steel were studied. The experimental results show that the optimum prehardening heat treatment technology for plastics die steel is as follows: air or oil quenching at 850��~870�� and tempering at 600~650 �� for 2 h.
�ź�;Ҧ�ﳼ;���¸�. ����ģ�߸ֵ�ԤӲ���������о�[J]. �й������ڿ���, 2009, 27(1): 15-0.
ZHANG Hai;YAO Feng��chen;LIU De��fu. Study on Preharden Technological Parameters of Plastics Die Steel. Chinese Journal of Iron and Steel, 2009, 27(1): 15-0.
2009, Vol. 27 
