应变诱发铁素体相变对低碳钢晶粒细化的影响

chg1555

应变诱发铁素体相变对低碳钢晶粒细化的影响
李维娟， 杜林秀， 张红梅， 刘相华， 王国栋
(东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳l10008)
摘要t研究了在奥氏体低温区变形时显傲组织的变化，并测试了其变形抗力。结果表明：在A 。以上温度变形会产生应变诱发铁索体相变，使变形抗力下降。通过降低变形温度，铁素体晶粒得到细化。关蕾调：低碳钢}应变诱发相变·铁索体}变形抗力·晶粒细化
中田分类号tTG142．3 文献标识码{A 文章编号：i001—0963(2000)05—0036—04
Effects of Strain—Induced Phase Transformation of Ferrite on Grain Refinement for LOW Carbon Steel
LI Wei—juan， DU Lin-xiu， ZHANG Hong—mei，LIU Xiang-hua，
(Northeastern University WANG Guo-dong Shenyang l10006，China)
Abstract：The evolution of m~crostructures of low carbon steel during the deformation of austenite at lower temperature was investigated，and the deformation resistance was measured．The result indicates that the strain—induced ferrite exists in mlcrostructure when the deformatlon temperature is above A ，and the resistance to def。rmation reduces as the deformation temperature decreases in certain temperature range．The ferrite grains can be refined through lowering the deformation tern—perature．
Key words：low carbon steelI strain—induced phase transformationIferriteIdef。rmation resistance}
grain—refinement