Abstract��Effect of trace Titanium on microstructure and properties of C-Si-Mn-B low alloy high strength steel were studied by using tensile, impact and flexural testing machines, optical microscopy and transmission electron microscopy. The properties of Titanium-containing steel and Titanium-free steel can meet the requirements of S355J0 standard. The microstructure of Titanium-free steel is composed of ferrite and pearlite, and the precipitates attached to MnS particles is BN particles, which is about 50��100nm. The microstructure of Titanium-containing steel is composed of ferrite, pearlite and bainitic, and the precipitates is TiN particles which is about 50��150nm. Trace Titanium added can significantly inhibit the precipitation of BN in the C-Si-Mn-B steel, so the content of the solid solution Boron element is increased. It can promote bainite formation in the phase transformation process and refine the microstructure, thus improving the strength.
��Բ���ź��ޣ���������������������. ���Ѷ�C-Si-Mn-B����֯�����ܵ�Ӱ��[J]. �й������ڿ���, 2013, 31(6): 5-7.
FANG Yuan,ZHANG Hong-yan,CUI Yang,YANG Dai-jun,ZHAO Yun-tang. Effect of Trace Titanium on Microstructure and Properties of C-Si-Mn-B Steel. Chinese Journal of Iron and Steel, 2013, 31(6): 5-7.
2013, Vol. 31 
