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利用热模拟压缩变形实验研究了每道次在工业界可接受的小变形量的多道次连续变形，合理控制工艺，通过应变强化相变与铁素体动态再结晶交互作用可获得细小铁素体晶粒组． Ｑ２３５级别 ２０钢的铁素体晶粒平均截径为 ３—５μｍ时，拉伸塑性略有下降，强度提高一倍
In this paper, the multi-pass continuous deformation of small deformation, which can be accepted by the industry, is studied by the thermal simulation of compressive deformation experiment. The control of the process is reasonable and fine ferrite can be obtained through the interaction between strain-enhanced phase transformation and ferrite dynamic recrystallization Body grain group. Q235 grade 20 steel ferrite grain average diameter of 3-5μm, the tensile plastic slightly decreased, the intensity doubled