摘要:为了解决高锰钢颚板使用寿命短、更换频繁和合金铸钢颚板韧性低、使用中易破断的难题,开发了一种含0.25﹪~0.40﹪C,1.0﹪~1.5﹪Mn,0.4﹪~1.2﹪Si,0.5﹪~1.6﹪Cr, 0.003﹪~0.008﹪B,0.005﹪~0.035﹪N,0.02﹪~0.08﹪Ca,0.05﹪~0.15﹪ Ti,0.02﹪~0.10﹪ Y和0.02﹪~0.10﹪ Mg的高强度马氏体钢,其抗拉强度大于1500MPa,伸长率大于5﹪,冲击韧性大于120J/cm2,硬度大于50HRC,满足了颚板的使用要求,提高了颚板的使用寿命.