C-Mn-Al系TRIP钢连续冷却转变及组织研究  

Research on Continuous Cooling Transformation and Microstructure of C-Si-Al TRIP Steel

作　　者：马海[1] 张宇光[1] 赵爱民[1] 唐荻[1] 

机构地区：[1]北京科技大学冶金工程研究院,北京100083

出　　处：《热加工工艺》2010年第6期14-16,共3页Hot Working Technology

基　　金："十一五"国家科技支撑计划项目(2006BAE03A06);北京市科技计划产业类项目(D07010300700701)

摘　　要：采用热膨胀仪测定了C-Mn-Al系TRIP钢在不同冷速下连续冷却转变的膨胀曲线;并运用Thermo-Calc软件,进行了C-Mn-Al系TRIP钢相变的理论计算。结合金相组织观察,研究了其连续冷却转变产物的组织形态。结果表明,当冷速>0.5℃/s时,组织由许多多边形先共析铁素体、少量珠光体和无碳化物贝氏体组成;冷速>5℃/s时,组织为铁素体和贝氏体;冷速>10℃/s时,开始出现马氏体和贝氏体的混合组织。The CCT curves of C-Si-Al TRIP steel were measured under different cooling speeds using thermal simulator instrument DIL805A,the phase transition point of C-Mn-Al TRIP steel was calculated using Thermo-Calc software. According to metallographic analysis,the microstructure of the sample was researched. The results show that when the cooling rate is above 0.5 ℃/s,the microstructure is made up of abundance pro-eutectoid ferrite,a little pearlite and carbon-free bainite; while the cooling rate is above 5 ℃/s,ferrite and carbon-free bainite are obtained; there are martensite and bainite in microstructure at above 10℃/s.

关 键 词：TRIP钢 连续冷却转变曲线(CCT曲线) 显微组织 

分 类 号：TG142.31[一般工业技术—材料科学与工程]