Abstract��The steel samples taken to the laboratory after the completion of the rolling process should be cooled in the air for 3 to 5 hours before test�� and the inspection cycle can be shortened to improve the test speed. The HRB400E air cooling sample��200 �� water cooling sample and 200 �� sample were compared. Taken the air cooling sample as reference standard�� the test samples of the other two kinds were carried out by mechanical properties testing and metallographic analysis. Experiments showed that the mechanical properties and metallographic structure of 200 �� water cooling and the air cooling specimens had no obvious differences and could be substituted for each other. Therefore�� after the rolling�� the hot steel samples sent to the mechanical properties laboratory were put into the water to be cooled and tested�� which can shorten the inspection time for two to four hours.
�� ��. ��Ȼ��ȴ��200 ��ˮ��HRB400E��ѧ���ܹ�ϵ̽��[J]. , 2018, 36(3): 15-20.
YANG Kai. Discussion about the mechanical properties relationship between the natural cooling and 200 �� water cooling HRB400E. , 2018, 36(3): 15-20.
2018, Vol. 36 
