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研究了19.8 T强磁场下Fe-0.47C-2.3Si-3.2Mn中碳硅锰钢在共析点以上较高温度的珠光体等温相变过程。讨论了不同处理条件下所获得的组织形貌特征,并对相变动力学进行了定量、半定量的统计分析。结果表明:相比12 T磁场,19.8 T磁场使得磁诱发珠光体(MIP)相变可以在更高的温度发生;珠光体(P)中两相的形成速度不同,两组成相面积分数的比值处于动态变化中,强磁场下铁素体(F)具有快速生长优势,渗碳体(Cem)的形成速度滞后于铁素体;MIP中,随等温温度的升高,粒状珠光体相对于片状具有更大的增量。
The isothermal transformation of pearlite at higher temperature above the eutectoid point of the carbon-manganese-manganese steel Fe-0.47C-2.3Si-3.2Mn at 19.8 T was investigated. The morphological characteristics of the tissue obtained under different treatment conditions were discussed. The quantitative and semi-quantitative statistical analysis of the phase transformation kinetics was also carried out. The results show that the phase transition of magnetically-induced pearlite (MIP) at 19.8 T can occur at a higher temperature than the 12 T magnetic field. The formation rates of two phases in pearlite (P) are different, and the ratio of the area fraction In the dynamic changes, the ferrite (F) has the advantage of rapid growth under the strong magnetic field, and the formation rate of cementite (Cem) lags behind ferrite. In MIP, with the increase of isothermal temperature, The shape has a larger increment.