High strength and high toughness frog of bainitic steel has its superiority of relatively better anti-wear property,longer contact fatigue life,lower cost and better solderability,etc.

• 阐述了贝氏体钢高强高韧辙叉具有更高的耐磨性和接触疲劳寿命,成本更低廉,可焊性好等优点。