X120管线钢热变形行为及动态再结晶晶粒的演变规律  

HOT DEFORMATION BAHAVIOR AND DYNAMIC-RECRYSTALLIZATION GRAIN EVOLUTION IN X120 PIPELINE STEEL

作　　者：高建忠[1] 郭斌[1,2] 徐进桥[2] 郭爱民[1,2] 王青峰[1] 

机构地区：[1]燕山大学亚稳材料制备技术与科学国家重点实验室,秦皇岛066004 [2]武汉钢铁(集团)公司武钢研究院

出　　处：《上海金属》2011年第3期6-10,18,共6页Shanghai Metals

基　　金：国家高技术研究发展计划(863计划)项目(2007AA03Z509)

摘　　要：采用Gleeble-3500单道次热压缩试验研究了X120管线钢的动态再结晶行为。结果表明：该钢在温度1 050~1 150℃和应变速率0.01~0.1 s-1下变形时容易发生动态再结晶;当应变速率为1~10 s-1时,动态再结晶难于发生。该钢热变形时的Z（Zener-Hollomon）参数方程为Z=.εexp[（498.288×/1038.31T）];动态再结晶发生的临界应变量εc和Z参数的关系为εc=0.034 445 lnZ-1.200 188 3;动态再结晶变形激活能Qd=498.288 kJ/mo。l试验结果为该钢轧制工艺的制定提供了依据。Dynamic recrystallization behavior of X120 pipeline steel was investigated by uniaxial hot compression tests performed on Gleeble-3500 Thermo-mechanical simulator.The results showed that under the condition of temperatures of 1 050～1 150 ℃ and strain rates of 0.01～0.1 s-1,the dynamic recrystallization occurred.When the strain rate increased to 1～10 s-1,the dynamic recrystallization didn＇t take place in the deformation process.By studying the strain-stress curves and observations of recrystallization grains,the Zener-Hollomon parametric equation was established：Z=ε·exp[498.288×1038.31T].The relation between the critical strain εc and the Z parameter was： εc = 0.034 445 lnZ-1.200 188 3.The activation energy of dynamic recrystallization of the X120 pipeline steel Qd was 498.288 kJ/mol.The results could provide reference for formulating the rolling process window.

关 键 词：X120管线钢 热变形 动态再结晶 Z参数 

分 类 号：TG111.7[金属学及工艺—物理冶金]