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针对中低碳钢淬透性评估及辊式淬火机淬火后钢板淬透层深度预测等问题,应用修正格罗斯曼法,分析碳含量、奥氏体晶粒度及合金元素对钢淬透性的影响,同时采用非线性拟合、多元化分析等方法,引入合金影响系数的概念,建立了中低碳钢淬透性预测数学模型。通过计算,将模型预测值与实际值相比较,吻合度较好,平均偏差比未修正时减小60%。研究结果已应用于某钢厂辊式淬火机淬后板材淬透层深度评估中,预测值与实际值偏差在6%以内,基本满足生产需要。
Aiming at the problem of hardenability evaluation of medium and low carbon steels and the prediction of depth of hardened steel sheet after quenching by roll quench, the modified Grossman method was used to analyze the effects of carbon content, austenite grain size and alloying elements on hardenability Meanwhile, the concept of alloy influence coefficient was introduced by non-linear fitting and diversified analysis, and the mathematic model of hardenability prediction of medium and low carbon steel was established. Through calculation, the predicted value of the model is compared with the actual value, the goodness of fit is better, and the average deviation is reduced by 60% than that without correction. The research results have been applied to the depth evaluation of quenched hardened steel sheet after quenching by a steel mill. The deviation between the predicted value and the actual value is within 6%, basically meeting the production needs.