铸造高锰钢复合孕育的动力学效应和应用

采用V_渣+Ti+Zn复合孕育剂在炼钢炉和钢包中对高锰钢进行“二步法”处理,起到控制和改善碳化物的析出量和形态,净化钢液,净化晶界和细化晶粒的孕育效果。叙述了稀土复合变质效果,钢水成分、微合金化元素,孕育剂成分,界面扰动的动力学效应。应用表明,成分(%)为0.901.15C,11.514.0Mn,1.01.5Cr高锰钢经V_渣+Ti+Zn复合孕育处理后,铸态力学性能有显著改善:钢的抗拉强度、延伸率、冲击韧性分别由401MPa、3.7%和2.3J/cm²提高到491MPa、8.4%和23J/cm²。

Application and Dynamics Effect of Compound Inoculation for High Manganese Steel

As the high manganese steel is treated by "top step process” in steelmaking furnace and in ladle using V_slag + Ti + Zn compound inoculation agent, the inoculation effect to control and improve precipitated amount and morphology of carbide, clean grain boundary and fine grain shall be got. Hie dynamics effects of compound inoculation modified effect of rare earth elements, composition of liquid steel, microalloying elements, inoculation composition and interface fluctuation are presented in this paper. Hie application results showed that the as cast mechanical properties of 0.90~1.15C, 11.5~14.0Mn, 1.0~1.5Cr high manganese steel were obviously improved by V_slag + Ti + Zn compound inoculation treatment, the tensile strength, elongation and impact toughness of steel were respectively increased to 491 MPa, 8.4% and 23 J/cm² from 401 MPa, 3.7% and 2.3 J/cm² .