Abstract��The microstructure and mechanical properties of different finishing temperatures for hot rolled low silicon containing phosphorus TRIP steel were investigated using a laboratory hot rolling mill. The results show that when finishing temperature is decreased from 900 to 790��, the volume fraction of ferrite is increased; the volume fraction of bainite is decreased; and the volume fraction of retained austenite has no evident changes. When finishing temperature are 900 and 820��, bainite is used as matrix microstructure. Lower temperature deformation enhances the transformation rate of austenite to ferrite, also the fine, uniform and equiaxed ferrite grains can be obtained as matrix microstructure, the average ferrite grain size is about 4��5��m, and the dislocations is observed in matrix, when finishing temperature is decreased to 790��. Compared with other kind of processes, the steels have excellent mechanical properties when finishing temperature is 790��: ultimate tensile strength, elongation and yield/strength ratio are 825MPa, 21��5% and 0��64 respectively.
����Ӣ�����Ʋ������. �����¶ȶԵ躬��ϵTRIP����֯���ܵ�Ӱ��[J]. �й������ڿ���, 2011, 23(10): 33-37.
HOU Xiao-ying,XU Yun-bo,WU Di. Effects of Finish Rolling Temperature on Microstructure and Mechanical Properties of Low Silicon Containing Phosphorus TRIP Steel. Chinese Journal of Iron and Steel, 2011, 23(10): 33-37.