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基于热模拟双道次压缩试验研究了2519铝合金变形后道次间隔时间内的软化行为,建立了静态再结晶模型。采用FORTRAN语言对有限元软件DEFORM-2D进行了二次开发,实现了2519铝合金多道次热轧过程的热力-组织耦合分析。结果表明:在多道次热轧过程中,由于外摩擦和变形区形状因子的作用,使得变形不均匀,造成再结晶百分数沿轧件厚度分布也不均匀,在前几道次上,轧件表面附近因发生较大的塑性变形而发生明显的再结晶行为,随着道次的增加,轧件心部才发生较明显的再结晶行为,使再结晶得以贯穿整个厚度。
Based on the two-pass thermal simulation experiment, the softening behavior of 2519 aluminum alloy after pass deformation was studied, and a static recrystallization model was established. The FORTRAN language was used to develop the finite element software DEFORM-2D. The thermo-mechanical coupling analysis of 2519 aluminum alloy multi-pass hot rolling process was realized. The results show that in the multi-pass hot rolling process, the deformation is not uniform due to the external friction and the shape factor of the deformation zone, resulting in the non-uniform recrystallization distribution along the rolling thickness. In the first few passes, Significant recrystallization occurs in the vicinity of the surface due to the large plastic deformation. With the increase of pass, the recrystallization of the heart of the rolled material occurs more obviously, so that the recrystallization can penetrate the entire thickness.