【摘要】 利用单道次压缩变形试验,对含微量Cr、Mn、Ti的低碳钢在不同变形温度及应变速率条件下的热变形行为,特别是铁素体区的热变形行为进行了研究。结果表明,峰值应力在铁素体区比在奥氏体区随变形温度的降低而提高的速率更快;在750～825℃铁素体区与950～1050℃奥氏体区,峰值应力的大小基本相当;根据流变应力曲线,确定了试验用低碳钢铁素体区的热变形激活能和热变形方程。更多还原

【Abstract】 The hot deformation behavior of a low carbon steel with the addition of chromium,manganese and titanium,and especially the hot deformation behavior in the ferrite range were investigated by using hot compression tests under different temperatures and strain rates.The results show that the peak stress in the ferrite range increases more rapidly with the decreasing of the deformation temperature compared with that in the austenite range.The peak stress of the low carbon steel at 750-825 ℃ in the ferrite range is similar to that at 950-1 050 ℃ in the austenite range.The hot deformation apparent activation energy and the hot deformation equation at the ferrite range are defined according to the stress-strain curves.更多还原