本发明提供一种辙叉心轨用贝氏体钢及其制备方法。以重量百分含量计,所述贝氏体钢含有：C 0.25-0.32％,Mn 1.0-2.0％,Si 0.8-1.7％,Cr 0.5-1.5％,Ni 0.1-0.6％,Mo 0.1-0.7％,Cu 0-0.1％,Al 0-0.1％,V 0-0.3％,Ti 0-0.1％,其余为铁元素及不可避免的杂质。本发明提供的贝氏体钢组织均匀、稳定性高,具有优良的抗接触疲劳性和耐磨性,使用寿命长。而且该钢材的制备工艺稳定,可大批量生产。

The invention provides a bainitic steel for frog core rail and a preparation method thereof. The bainitic steel contains: C 0.25-0.32%, Mn 1.0-2.0%, Si 0.8-1.7%, Cr 0.5-1.5%, Ni 0.1-0.6%, Mo 0.1-0.7%, Cu 0-0.1%, Al 0-0.1%, V 0-0.3%, Ti 0-0.1%, and the rest are iron and inevitable impurities. The bainitic steel provided by the invention has uniform structure, high stability, excellent contact fatigue resistance and wear resistance, and long service life. Moreover, the preparation process of the steel is stable and can be produced in large quantities.