16Mn钢奥氏体动态再结晶及晶粒细化研究

RESEARCH ON THE DYNAMIC RECRYSTALLIZATION OF AUSTENITE AND GRAIN REFINEMENT IN 16Mn STEEL

研究了16Mn钢奥氏体动态再结晶、晶粒细化、晶率细化率及γ—α相变后铁素体晶粒大小与变形量ε、变形温度之间的关系。结果显示，奥氏体晶粒细化率和γ→α相变后铁素体晶粒大小都与变形量。之间存在指数函数关系；动态再结晶完成后，奥氏体晶粒平均直径与变形速率温度修正系数Z之间符合线性关系。

The relationships among dynamic recrystallization of austenite, grain refinernent, ratio of grain refinement, ferrite grain size after γ→α phase transformation, the deformation amount ε and deforma tion temperature in 16 Mn steel were studied. The results showed that the ratio of austenite grain refinement and the ferrlte grain size after γ→α phase transformation were exponentially related to the deformation amount ε. Af ter the dynamic recrystallization was finished, the relationship between the average diameter of austenitic grains and the modification factor Z of temperature for de formation velocity was linearly conformable.