含硼微合金钢奥氏体热变形行为  

Hot Deformation Behavior of Austenite of a Microalloyed Steel Containing Boron

作　　者：李立新[1] 邓宁[1] 洪杰[1] 汪凌云[2] 

机构地区：[1]武汉科技大学,武汉430081 [2]重庆大学,重庆400044

出　　处：《特殊钢》2005年第1期16-18,共3页Special Steel

摘　　要：采用单道次压缩实验方法 ,通过Gleebe 15 0 0热模拟试验机对成分 (% )为 :0 0 5C ,1 5 7Mn ,0 5 0Cu ,0 0 5Nb ,0 0 14Ti,0 .0 0 12B微合金化钢进行 80 0～ 110 0℃应力 应变曲线和再结晶组织演变的试验研究 ,建立了动态再结晶临界应变和晶粒尺寸模型。得出降低变形温度或提高变形速率可明显细化该微合金化钢的晶粒。The stress-strain curves and microstructure evolution of a microalloyed steel - 0.05C, 1.57Mn, 0.50Cu, 0.05Nb, 0.014Ti , 0.001 2B between 800 and 1 100 ℃ have been tested and studied by Glee be-1500 hot simulator using single pass reduction test method, and based on the experimental results the grain size model and the critical strain of dynamic recrystallization have been established. It is obtained the grain size of the microalloyed steel shall be fined with decreasing of deformation temperature and increasing of deformation rate.

关 键 词：微合金钢 奥氏体 热变形 动态再结晶 组织演变 热模拟试验机 微合金化钢 晶粒 试验研究 细化 

分 类 号：TG335[金属学及工艺—金属压力加工]