Abstract
Ladle treatment of molten Hadfield steel considers as the new effective technique for producing Hadfield steel instead of conventional heat treatment process. New eutectic is formed as a result of the ladle treatment process. In this research, the strain-hardening property of the four grades of Hadfield steel containing granular new eutectic phase has been investigated, and compared with the conventional Hadfield steel. Optical and scanning electron microscope reveal that slip bands fractions vary through the five grades of steel as a result of deformation. XRD observation refers to the austenite phase is still the dominant phase through the whole five grades of steel after deformation. The results of the compression and hardness tests clarify that the new granular eutectic phase has a significant effect on the strain-hardening behavior, austenite stability. The nodularity of new eutectic phase is a considerable parameter in the function of yield strength, and hardness increment as well.
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