Abstract
Cr-Ni-Mo steel, as a hot-work die steel, has become increasingly demanding of service temperature and strength. This study investigated the effect of precipitates on the deformation behavior of tempered martensite at 700 °C. Tempering specimens with different dislocation densities leads to different behavior due to the size and volume fraction of precipitates. This decreases dynamic recrystallization and interfacial mobility, resulting in higher interfacial energy. Meanwhile, the precipitates boost strength and thermal stability of the tempered martensite.
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