稳恒磁场对马氏体转变的影响

Influence of Stable Magnetic Field on Martensite Transformation

利用自制的磁场热处理设备对中、高碳钢进行了施加磁场与不施加磁场的淬火处理,研究了奥氏体在NaCl溶液中冷却时的组织转变,观察了相变后的组织变化。结果表明,在中、高碳钢发生奥氏体向马氏体转变时,稳恒磁场可使马氏体的形核率增加,提高马氏体的转变开始温度,使相变在更宽的温度区间进行,促进了奥氏体向板条马氏体的转变。

The medium and high carbon steels were quenched with and without magnetic field in the self-made quench tank, the austenite transformation in the NaCl solution was studied, and the microstructure change after phase transformation was observed. The results show that when the austenite of the medium and high carbon steels transforms into the martensite, the stable magnetic field can increase the nucleation ratio of martensite, raise the beginning transformation temperature, make the martensite transformation happening in a wide temperature zone, and promote austenite to lath martensite transformation.