Refinement of Eutectic Carbides in M2 High Speed Steel by Adjusting Magnetic Flux Density During Magnetic Controlled ESR Process

The current study examines the effect of magnetic flux density (MFD) on morphology metal pool and refinement eutectic carbides in controlled electroslag remelting (MC-ESR, M2 high speed steel). When a transverse static field (TSMF) with larger MFD was used, it easier to obtain shallower finer carbides. These phenomena are explained by smashing droplet neck (stronger at higher values) induced electromagnetic vibration, resulting smaller/more dispersed droplets thus more uniform temperature distribution pool. Additionally, as increased, local solidification time (LST) decreased (0 140 mT) number inclusions serving heterogeneous nuclei for carbide formation increased 65 mT), gradual size reduction However, MC-ESR must consider above two factors comprehensively, applied TSMF need not be excessively large.