Research demonstrates heat treatment effects on melt pool profile and macro segregation in martensitic stainless tool steel, suggesting enhanced process optimization.
A martensitic stainless tool steel was remelted by a Pressure Electroslag Remelting (PESR) process with deliberate cancellation of the remelting just before normal hot-topping operation. Enabling evaluation of the ingots melt pool profile, dendrite angle and -spacing, and macro segregation during normal remelting conditions. A longitudinal cross section (500×500 mm) from the top of the cylindrical 500 mm diameter ingot was extracted from its transverse midpoint and macro-etched. Microstructural characterization of the solidification structure was carried out using a combination of light optical microscopy and high-resolution camera images, and macro segregation by optical emission spectroscopy and combustion infrared detection. The results from the ingot cross section were compared with predictions made by the commercially available modelling software package, MeltFlow-ESR™.
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Olsson et al. (2025) studied this question.
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