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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。
Study on austenite grain changes after multi-pass deformation of 16Mn steel containing trace titanium in austenite complete recrystallization zone at constant temperature, constant pass sub-interval and constant pass sub-gap time. It is found that austenite The grain size will reach a limit size, the total amount of deformation required to reach the limit size and the ultimate grain size achieved will vary depending on the deformation conditions. The higher the deformation temperature is, the smaller the total amount of deformation required Rorit is, and the greater the amount of deformation is, the greater the amount of deformation of the pass is. The greater the required total deformation is, the smaller the amount of deformation is and the smaller the influence of the pass-gap time is. According to the experimental results, it is proposed that a reasonable process system for controlling the rolling of the steel in the completely recrystallized austenite zone is to maintain the deformation at a temperature of about 950 ° C for more than two passes and the amount of pass deformation of 20%.