控轧控冷TRIP钢的微观相组成及其与力学性能的关系  

Phase composition of controlled rolling and cooling TRIP steel and its relationship with mechanical properties

作　　者：米振莉[1] 陈美芳[1] 李志超[1] 江海涛[1] 张明明[1] 

机构地区：[1]北京科技大学冶金工程研究院,北京100083

出　　处：《北京科技大学学报》2012年第9期1023-1027,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(50804005)

摘　　要：采用电子背散射衍射技术等实验方法,研究了控轧控冷工艺制备的铌钒微合金化C--Mn--Si系热轧TRIP钢的显微组织及相组成,并分析了与其对应的力学性能.奥氏体轧制过程中的热变形及随后的冷却工艺对最终各相组织的形貌、大小和分布都有直接影响,并决定TRIP钢最终的力学性能.对TRIP钢卷取温度的模拟结果显示,与450和350℃模拟卷取温度相比,400℃模拟卷取温度能使该钢获得更好的综合力学性能.The microstructure, phase composition and mechanical properties of hot rolled C-Mn-Si transformation-induced plastici- ty （TRIP） steel which was low-alloyed with Nb and V were investigated by means of electron back scatter diffraction （EBSD）. It is found that the deformation of austenite by hot rolling and the cooling process followed has direct impact on the microstructure concerning the shape, size, and distribution of ferrite, bainite and retained austenite, which determines the ultimate mechanical properties of the TRIP steel. The simulated results for coiling temperature of the TRIP steel show that the hot strips coiled at 400 ℃ obtain the best com- prehensive mechanical properties compared to those coiled at 450 and 350 ℃.

关 键 词：TRIP钢 控轧 控冷 显微组织 相组成 

分 类 号：TG335.3[金属学及工艺—金属压力加工]