Research on the Mathematical Modeling for Dynamic Recrystallization of V-N Microalloyed Steel
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摘要: 利用Gleeble-3800热模拟试验机对含钒微合金钢进行了温度范围为900~1 050℃,应变速率范围为0.1~10 s-1的单道次压缩试验,得到了试验钢的应力-应变曲线。采用回归分析法确定了双曲线本构方程中的材料常数,动态再结晶激活能和临界应变量与Z参数的关系。根据该试验钢发生动态再结晶的条件,建立了其动态再结晶图。Abstract: Single-pass compressing tests were performed with the Gleeble-3800 thermo-mechanical simulator at the temperature of 900 ℃ to 1 050 ℃ and strain rate of 0.1 s-1 to 10 s-1 to investigate the dynamic recrystallization behavior of a kind of vanadium-bearing microalloyed steel and the stress-strain curve was obtained as a result.By the regression analysis of the stress-strain data obtained from the test,the material parameters in the hyperbolic sine constitutive equation and the dynamic recrystallization activation energy,including the relationship between the critical strain and parameter Zener-Hollomon,were determined.Based on the conditions for the deformation,the dynamic recrystallization diagram of the tested steel was drawn.
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