The Regression Analysis on Composition and Property of Medium-Small Size 20MnSi Ribbed Bar

Through randomly sampling of 504 heats to do statistic to chemical composition and property of 20MnSi steel and using mathematic regression method to do optinization to the chemical composition of 20MnSi ribbed bar of medium small size,the result expresses that controlled limite of optinization composition can be determined by relationship of 〔C〕、〔Si〕、〔Mn〕、〔S〕、〔P〕 with σ s 、σ b 、δ 5.