In this article, a thermal‐phase model for quenching medium carbon alloy steel is developed based on multi‐physics field coupling simulation. The model integrates transient heat transfer, phase transformation, and hardness calculation. Combined with experimental characterization, the effects of different quenching end temperatures on the temperature field, microstructure distribution, and hardness of the sample are systematically analyzed. The results indicate that as the quenching end temperature increases, the cooling rate at the surface and central regions of the sample gradually decreases, leading to a reduction in both the martensite content and hardness. Conversely, the impact toughness and resistance to impact abrasive wear improve. When quenched at 100°C, the sample surface exhibits the highest martensite content, with the maximum hardness difference between the surface and core reaching 327.87 HV, while the impact toughness is the lowest at 28 J/cm 2 . At 170°C, the surface microstructure consists of a mixture of bainite and martensite, with the minimum hardness difference between the surface and core being 266.14 HV. The impact toughness and resistance to impact abrasive wear reach their optimal values of 53 and 2.94 J/cm 2 , respectively. By integrating simulation with experimental analysis, the dynamic evolution of the quenching process can be effectively captured, thereby revealing the influence of process parameters on microstructural evolution and overall mechanical properties.
Wu et al. (Thu,) studied this question.
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