Ti合金化钢连铸坯高温力学性能研究  

Research on the High Temperature Mechanical Properties of Ti Alloyed Steel Continuous Casting Billets

作　　者：苗隽 王群骄[2] 张秀香 刘志璞 何群才 文小明 崔洪涛 

机构地区：[1]本钢集团板材股份有限公司技术研究院,辽宁 本溪 [2]东北大学材料学院,辽宁 沈阳

出　　处：《材料科学》2020年第8期678-683,共6页Material Sciences

摘　　要：利用Gleeble-2000热/力模拟试验机,研究了Ti合金化高强集装箱用钢BG550C连铸坯的高温力学性能,获得600℃~1400℃范围内铸坯的高温抗拉强度、断面收缩率随温度变化的基本规律。根据数据分析结果表明:高温抗拉强度随温度升高而降低,当温度超过1000℃以上,铸坯的抗拉强度基本上小于10 MPa,说明在高温下铸坯抵抗外力的能力较差;该钢种的塑性区温度范围880℃~1300℃,当温度超过960℃时,断面收缩率均 】85%,脆性区温度范围600℃~850℃,断面收缩率 【60%,脆性区温度较窄,铸坯具有良好的塑性,可以承受一定的塑性变形。根据高温拉伸试验结果制定合理的二冷冷却制度,为Ti合金化钢连铸坯生产提供理论依据。The Gleeble-2000 thermal/force simulation test machine was used to study the high temperature mechanical properties of Ti alloyed steel continuous casting billet, and the basic law of high tem-perature tensile strength and section shrinkage rate with temperature in the range of 600˚C^1400˚C was obtained. The results of data analysis show that the tensile strength of high temperature decreases with the increase of temperature. When the temperature exceeds 1000˚C, the tensile strength of the cast billet is less than 10 MPa, indicating that the casting billet is less able to resist external force at high temperature;the plastic zone temperature range of the steel is 880˚C^1300˚C, and the shrinkage rate of the section when the temperature is over 960˚C. The temperature range of the brittle zone is 85%, the temperature range of the brittle zone is 600˚C^850˚C, the shrinkage of the section is less than 60%, the temperature of the brittle zone is narrow, and the cast billet has good plasticity, which can bear a certain plastic deformation. According to the results of high temperature tensile test, a reasonable two cooling system is worked out to provide a theoretical basis for the production of Ti alloyed steel continuous casting billets.

关 键 词：Ti合金化钢 高温力学性能 热模拟 连铸坯 

分 类 号：TG1[金属学及工艺—金属学]