含Nb-Ti微合金汽车用钢高温变形组织及力学性能的研究  

STUDY ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF Nb-Ti MICROALLOYED AUTOMOTIVE STEELS IN THE CONDITION OF HIGH TEMPERATURE DEFORMATION

作　　者：赵刚[1] 叶传龙[1] 余驰斌[1] 宋平[2] 苏毅[2] 曾萍[2] 陈良[2] 

机构地区：[1]武汉科技大学 [2]武汉钢铁集团公司

出　　处：《钢铁研究》2003年第3期46-50,共5页Research on Iron and Steel

摘　　要：研究了含Nb -Ti微合金汽车用钢高温变形时的软化行为和晶粒析出 ,对析出物的尺寸和分布进行了电镜分析。通过单道次和双道次压下模拟实验 ,分析了试验钢在不同温度和不同变形条件下的流动应力及显微组织。这些研究为制定最佳控轧工艺 ,得到细化奥氏体晶粒 ,获得良好的组织。This paper studies the softening behavior and precipitat io n under high temperature deformation for Nb-Ti micro-alloyed automotive steels. The sizes and distribution of the precipitation particles were observed by TEM a nalysis. Single-pass and double-pass compression tests of thermal simulation exp eriment were carried out to investigate the flow stress and microstructure in di fferent temperatures and deforming conditions for the steels. These investigatio ns have laid a theoretical foundation to establish the optimal controlled rollin g parameters to produce fine grain steels with good microstructure and propertie s.

关 键 词：汽车用钢 高温变形 组织 力学性能 微合金钢 析出物 TEM 晶粒细化 

分 类 号：TG142.33[一般工业技术—材料科学与工程] U465.11[金属学及工艺—金属材料]