摘要
双辊铸轧薄带钢在金属刚刚凝固的同时就承受一定量的加工变形 ,若变形量控制不当 ,极易产生内部裂纹和表面裂纹 .为此 ,研究实验用钢在高温下的变形和力学性能具有重要意义。本文利用Gleeble 1 5 0 0热模拟试验机 ,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)和零强度温度 (ZST) ,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 1 3 5 0℃至熔点 ,其ZDT和ZST分别为 1 40 0℃和 1 45
The twin roll cast thin strip bears some deformation when metal is in the beginning of solidification. Internal cracks and surface cracks would form if the deformation amount is not controlled properly. Therefore, it is significant to study the high temperature deformation and mechanical property of tested steel. The hot ductility and strength of tested low carbon steel were studied by two different hot deformation schedules, heating and solidifying, by Gleeble 1500 thermal stress/strain simulator. Zero ductility temperature (ZDT) and zero strength temperature (ZST) were measured. Meanwhile, crack sensitivity and fracture microscopic structure were analyzed. It is affirmed that the result of solidifying is close to the real process. The temperature range from 1350℃ to melting point is the brittle temperature range of tested steel. ZDT and ZST is 1400℃ and 1450℃ respectively.
出处
《材料与冶金学报》
CAS
2003年第1期59-62,共4页
Journal of Materials and Metallurgy
基金
国家自然科学基金资助项目 (No 5 9995 44 0 )
国家重点基础研究发展规划项目 (G2 0 0 0 0 672 0 8-4 )
辽宁省自然科学基金资助项目 ( 2 0 0 110 10 2 1)
关键词
低碳钢
高温力学性能
零塑性温度
零强度温度
high temperature mechanical property
zero ductility temperature
zero strength temperature
