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通过JMatPro计算,研究了真空浇注条件下,C、Si、Mn、Cr、Ni和Mo等6种合金元素对核电用钢SA508III铸造性能的影响。利用正交试验原理设计了6因素3水平共150组试验,通过方差分析和线性回归等手段,确定了与铸造性能相关的两个目标函数的回归方程。计算结果表明,正交试验设计可以用于SA508III钢的合金成分优化;降低合金中C和Si的含量,有利于改善SA508III合金的铸造性能,减小合金在凝固过程中产生热裂和缩孔、缩松的倾向。
Through the JMatPro calculation, the effects of 6 alloying elements such as C, Si, Mn, Cr, Ni and Mo on the casting performance of nuclear steel SA508III were studied under vacuum casting conditions. Based on the principle of orthogonal experiment, a total of 150 groups of 6 factors and 3 levels were designed. The regression equations of two objective functions related to casting performance were determined by means of variance analysis and linear regression. The results show that the orthogonal experimental design can be used to optimize the alloy composition of SA508III steel. Reducing the content of C and Si in the alloy can improve the casting performance of SA508III alloy and reduce the thermal cracking and shrinkage of the alloy during the solidification. Loosening tendency.