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.
出处
《热加工工艺》
CSCD
北大核心
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)
