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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。
The single-pass compression deformation test was used to study the thermal deformation behavior of low-carbon steel containing trace Cr, Mn and Ti under different deformation temperature and strain rate, especially the thermal deformation behavior of ferrite. The results show that the peak stress increases faster in the ferrite zone than in the austenite zone with decreasing deformation temperature. In the ferrite zone at 750-825 ℃ and the austenite zone at 950-1050 ℃, the peak stress The size is basically the same; According to the flow stress curve, the heat deformation activation energy and the heat deformation equation of the ferritic zone for the test of low carbon steel are determined.