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本文利用热加工模拟试验装置,通过单道压缩试验和多道压缩试验,绘制了多组真应力—应变曲线,研究了上海第三钢铁厂冶炼的16Mn 钢在四辊轧机上采用控制轧制工艺生产中板时存在的应变残留效应。应变残留率λ的大小受变形温度、变形量和道次间隔时间的影响,当终轧温度为850℃和800℃时,终轧道次的λ值分别达到0.31和0.44。由于应变残留效应的存在,使钢的变形抗力增加,当终轧温度为850℃和800℃时,终轧道次的变形抗力与单道压缩试验测得数值相比分别增加了8.9%和19.8%。应用应变残留效应理论,将变形抗力回归公式中的ε项用实质应变ε~t=ε+Δε来代替,整理出变形抗力预测公式K_m=1.004(ε+Δε)~(0.2352)(?)T_k exp((3193)/T_k)
In this paper, a series of true stress-strain curves were drawn by single-pass compression test and multi-pass compression test by means of hot working simulation test device. The control rolling process of 16Mn steel smelted by No. 3 Shanghai Iron & Steel Works Strain residual effect in the production of plate. Strain residual rate λ is affected by the deformation temperature, deformation and pass interval time. When the finishing temperature is 850 ℃ and 800 ℃, the λ values of finishing pass are 0.31 and 0.44, respectively. Due to the strain residual effect, the deformation resistance of the steel increases. When the finishing temperature is 850 ℃ and 800 ℃, the deformation resistance of the final pass increases by 8.9% and 19.8 respectively compared with the single-pass compression test %. Applying the theory of residual strain effect, the ε term in the regression formula of the deformation resistance is replaced by the real strain ε ~ t = ε + Δε, and the deformation resistance prediction formula K_m = 1.004 (ε + Δε) ~ (0.2352) exp ((3193) / T_k)