摘要
在Gleeble1 50 0热模拟机上测定了温度为 850℃ ,变形为 50 %的单道次及多道次动态CCT曲线 ,并以此为依据在Ar3附近进行了多道次积累大变形和单道次大变形的轧制对比实验。同时进行了变形温度、变形量和冷却速度对铁素体相变行为的影响研究。结果发现在奥氏体未再结晶区进行多道次大压下量轧制及轧后快速冷却 ,可以大大地细化晶粒。
The single pass and multi-pass continuous cooling transformation(CCT)diagram for austenite with compressive deformation by 50% at 850℃ are determined in a Gleeble 500 thermonechanical testign machine.Comparison tests of multipass accumulated heavy deformation rolling adn single pass haeavy deformation rolling have been made at the temperature around Ar3 on the basis of the CCt diagram.In the mearrwhile effects of deformation temperature,reduction adn cooling rate on the ferrite phase transformation behavior are clarified.Results show that the grains are greatly refined by malti-pass heavy reduction rolling and accelerated cooling in the non-crystallization region.
出处
《钢铁研究》
CAS
2000年第4期36-39,56,共5页
Research on Iron and Steel
关键词
动态CCT曲线
晶粒细化
铁素体相变
变形工艺参数
dynamic CCT diagram ferrite deformation induced transformation recrystallization
