作　　者： ; ; ; ;

机构地区： 东北大学材料与冶金学院轧制技术及连轧自动化国家重点实验室

出　　处： 《东北大学学报（自然科学版）》 2004年第1期40-43,共4页

摘　　要： 利用Gleeble 1500热模拟实验机,采用加热法和凝固法两种加热变形制度,研究了实验用低碳钢的热塑性及强度,测定了该钢种的零塑性温度(ZDT)θd及零强度温度(ZST)θs,分析了其裂纹敏感性及断口组织·结果表明,凝固法所测结果更符合实际;实验钢的高温脆性温度范围为1300℃至熔点,在1100～1300℃范围内,此钢的断面收缩率均大于60%,具有良好的塑性·实验用低碳钢的高温脆性区较小,具有较强的抗高温裂纹特性·其θd和θs分别为1350℃和1400℃· The hot ductility and strength of low carbon steel were studied by using Gleeble-1500 thermal stress/strain simulator according to the hot deformation schedules of heating and solidifying separately. θ_d and θ_s, zero ductility temperature (ZDT) and zero strength temperature (ZST) respectively, were measured. Meanwhile, crack sensitivity and fracture microscopic structure were analyzed. The results show that the measurements of solidifying method are closer to the actuality. The brittle temperature of tested steel is from 1350℃ to melting point. The cross section contraction rate of the test steel is greater than 60% in the range from 1100～1300℃, showing the steel has higher resistance to high temperature cracking. The θ_d and θ_s of the steel are 1350℃ and 1400℃ respectively.

关 键 词： 双辊铸轧 薄带铸钆 低碳钢 高温力学性能 零塑性温度 零强度温度 热塑性

领　　域： [金属学及工艺] [金属学及工艺] [一般工业技术] [金属学及工艺]