The effects of an axial static magnetic field (ASMF) on the carbides and mechanical properties of electroslag-remelted (ESR) Cr12MoV die steel were investigated. The superimposition of a 30 mT ASMF induced unidirectional rotation in the molten slag pool, resulting in a more uniform temperature distribution at the front of the dendrite solid–liquid interface. The size of the grains and carbides in the ESR Cr12MoV steel ingot became smaller. The sulfur content of the ingots decreased and the mechanical properties (hardness and impact energy) increased after applying the ASMF. A new mechanism was proposed that the unidirectional flow was mainly due to the coupled thermoelectric magnetic force induced in the melt between dendrites, which promoted the refinement of grains and carbides, as well as the desulfurization process, thereby resulting in the enhanced mechanical properties of the Cr12MoV die steel.

研究了轴向静磁场（ASMF）对电渣重熔（ESR）Cr12MoV模具钢的碳化物和力学性能的影响。30 mT ASMF的叠加引起熔渣池中的单向旋转，从而在枝晶固液界面的前端产生更均匀的温度分布。ESR Cr12MoV钢锭中的晶粒和碳化物尺寸变小。应用ASMF后，铸锭中的硫含量降低，机械性能（硬度和冲击能）提高。提出了一种新的机理，即单向流动主要是由于在树枝状晶体之间的熔体中产生的耦合的热电磁力，从而促进了晶粒和碳化物的细化以及脱硫过程，