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应用分子动力学结合有限元的方法对冷却介质水在45钢淬火过程中的运动状态进行了模拟计算,结果表明试件淬火冷却开始时,与高温45钢表面接触的冷却介质瞬间被汽化,温度迅速升高,高温介质体积膨胀上浮出液态介质将热量散发到环境中,少部分来不及浮出的高温介质将热量传给低温介质。这与现阶段普遍认同的淬火冷却阶段划分理论相一致,而介质温度随时间的变化规律和介质微观运动轨迹进一步表明数值模拟结果与工程实际应用工况基本一致。
The molecular dynamics and the finite element method were used to simulate the movement of cooling medium water in the quenching process of 45 steel. The results show that the cooling medium in contact with the high temperature 45 steel surface is momentarily vaporized at the beginning of quench cooling. The temperature Rapidly rising, high-temperature media, volume expansion Floating out of the liquid medium The heat will be emitted to the environment, a small part of the time to emerge from the high-temperature medium The heat to low temperature medium. This is consistent with the generally accepted theory of quenching and cooling stage division. The variation law of medium temperature with time and the micro-motion trajectory of the medium further indicate that the numerical simulation results are in good agreement with the engineering practice.