【摘要】 含微量钛的16Mn钢在奥氏体完全再结晶区进行恒温、恒道次变形量和恒道次间隙时间的多道次变形后奥氏体晶粒变化的研究,发现多道次变形后奥氏体晶粒尺寸会达到一个极限尺寸,达到极限尺寸所需总变形量和达到的极限晶粒尺寸因变形条件而异。变形温度越高达到所需总变形量Rorit越小,达到的越大,道次变形量越大,达到所需总变形量越大,达到的越小,道次间隙时间的影响小。根据实验结果,提出了在奥氏体完全再结晶区控制轧制该钢种时的合理工艺制度是要保征在950℃左右有2道次以上,道次变形量为20％的变形。更多还原

【Abstract】 In order to study the variation of Austenite grain, the Ti- treated 16Mn steel was multi-pass deformed in Austenite complete recrystallization region at constant rolling temperature, pass reduction and interval between passes. After multi-pass rolled, the Austenite grain reached a limit size dr. To change deforming conditions will affect the critical amount deformation (Rcrit) required to reach the dr With the increasing of deformation temperature, Kcrit decreased and dr increased; At big pass reduction, Rcrit increased and Dcrit decreased; while the affluence of interval between passes on Rcrit and dr was small. Depending on above mentioned result, a reasonable technical schedule for this steel to be control in Austenite complete recrystallization region is that there must be at least two passes at 950℃ or so and each pass reduction is about 20%.更多还原