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本文应用图象分析方法对A1-7Si-0.6Mg铸造合金的显微组织参数(铝枝晶胞参数和共晶硅粒子特征参数)进行了定量的测定和分析,并对显微组织参数与合金拉伸性能之间的定量关系进行了研究。研究表明:硅粒子长度服从Weibull分布,硅粒子圆度的倒数服从概率密度为:P(x)=m·n(1-x)~(n-1)e~(-m)(1-x)~n 0≤x≤1的分布。应用回归分析方法建立组织参数与拉伸性能的定量关系式为: UTS=374.48-0.833DAS UTS=373.38-104.92/N~(0.5) Q_A=6.127N~(0.5)-18.955DF+381.023(1/R) Elong=exp(Q_A-13/210)
In this paper, the microstructure parameters (aluminum dendritic cell parameters and eutectic silicon particle characteristic parameters) of A1-7Si-0.6Mg cast alloy were quantitatively determined and analyzed by image analysis method, and the relationship between microstructure parameters and alloy The quantitative relationship between tensile properties was studied. The results show that the length of the silicon particles follows the Weibull distribution, and the probability density of reciprocal compliance of the silicon particle circularity is: P (x) = m · n -1-x ~ n-1 e ~ -m 1-x ) ~ n 0 ≦ x ≦ 1. The quantitative relationship between tissue parameters and tensile properties was established by regression analysis method as follows: UTS = 374.48-0.833DAS UTS = 373.38-104.92 / N ~ (0.5) Q_A = 6.127N ~ (0.5) -18.955DF + 381.023 (1 / R) Elong = exp (Q_A-13/210)