热变形参数对α→γ逆相变再结晶晶粒细化的影响  

Effect of hot deformation parameter on grain refinement of austenite through recrystallization with α→γ reverse transformation

作　　者：赵英利[1,2] 时捷[2] 王毛球[2] 惠卫军[2] 董瀚[2] 谢刚[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093 [2]钢铁研究总院结构材料研究所,北京100081

出　　处：《金属热处理》2010年第3期68-70,共3页Heat Treatment of Metals

摘　　要：利用Gleeble-1500热模拟试验机,研究了热变形参数对低碳微合金钢α→γ逆相变再结晶的影响及其晶粒细化的机制。结果表明,试验钢中非平衡态组织马氏体在再加热过程中,原奥氏体晶粒发生了逆相变再结晶,并随变形温度的降低,再加热淬火后的奥氏体晶粒逐渐细化;在部分再结晶区变形得到的混晶组织,可以通过逆相变再结晶得到消除;随变形量的增加,再加热淬火后的奥氏体晶粒逐渐细化。By the using of Gleeble-1500 machine,the effect of hot deformation on grain refinement of austenite through α→γ reverse phase transformation in low carbon microalloy steel was studied.The results show that the reverse transformation recrystallizations of the initial austenitic grains occurs during the reheat process of non-equilibrium martensite,and austenite grains refine with decreasing deformation temperature.The mixed-grains achieved by deformation in the partial recrystallization region can be eliminated by α→γ reverse transformation.The austenite grains after reheat quenching refine gradually with increasing the deformation degree.

关 键 词：热变形 晶粒细化 再结晶 混晶 逆相变 

分 类 号：TG111.7[金属学及工艺—物理冶金]