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本研究利用压缩变形热加工模拟试验装置,研究了武钢生产的低碳锰铌钢在热连轧精轧机组控轧工艺生产板卷时钢的变形抗力和应变残留效应。得出:应变残留率λ值的大小是钢的化学成分、变形温度、变形量和道次间隔时间的函数,其数学模型为: λ=0.808×10~(-3)·exp(9059/T_k)·ε~(0.449)·exp(-0.21toM)应用应变残留效应理论,同实质应变ε~t=ε+Δε作为变形抗力模型中的ε项时,整理出变形抗力数学模型如下: K_m=2.8173(ε+Δε)~(0.2538)·ε~(0.0000957)·T_(kexp)(2382/T_K) Δε=λ_(n-1)·(ε_(n-1)+Δε_(n-1)本研究结果为开展热连轧机控轧工艺条件下钢的变形抗力研究开辟了一条新途径。
In this study, the deformation resistance and strain residual effect of low carbon manganese and niobium steel produced by Wuhan Iron and Steel Co., Ltd. were studied during hot strip mill rolling process. The results show that the value of strain residual rate λ is a function of the chemical composition, deformation temperature, deformation and interpass time of the steel. The mathematical model is λ = 0.808 × 10 ~ (-3) · exp (9059 / T_k ) · Ε ~ (0.449) · exp (-0.21toM) Applying the theory of strain residual effect, the same strain ε ~ t = ε + Δε as the ε term in the deformation resistance model, the mathematical model of deformation resistance is concluded as follows: K_m = 2.8173 · ε · (0.0000957) · T kexp (2382 / T_K) Δε = λ_ (n-1) · (ε_ (n-1) + Δε_ (n-1) The results opened up a new way for the study of deformation resistance of steel under the condition of controlled rolling of hot strip mill.