本文提出了端淬曲线预测新方法。端淬试样硬度分布模型采用了含有待定参数的解析函数。此待定参数是钢的淬透性系数，而不是已有文献中讨论的合金元素的淬透性系数。淬透性系数的大小直接决定端淬曲线的递减速率。因此，端淬曲线的计算预测问题转化成淬透性系数的求解。在端淬试验标准状态下，淬透性系数取决于钢的化学成分。用分部逼近法建立了结构钢淬透性系数与化学成分之间的关系式。将计算获得的淬透性系数代入到硬度分布模型对端淬曲线进行了预测，结果表明预测曲线与试验值吻合很好。
This paper presents a novel method for predicting the Jominy curve of structural steels. An analytical function containing the undetermined parameter was used to calculate the Jominy hardness distributions. This undetermined parameter was defined as the hardenability coefficient of steel, which is different from the conventional element coefficient and depends on the descending velocity of the Jominy curve. Therefore, the problem predicting the Jominy curve changes to one calculating the hardenability coefficient. It was demonstrated that the hardenability coefficient depends on the chemical composition under the condition of the standard Jominy test. An empirical relationship between the hardenability coefficient and the chemical composition of structural steels has been established using a subsection approach. Substituting the obtained hardenability coefficient into the distribution model of the hardness, the predicted Jominy curves exhibited very good agreements with the experimental data.
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