海洋平台用EH460钢热变形行为研究
Study on Hot Deformation Behavior of EH460 Steel for Offshore Platform
DOI: 10.12677/MS.2022.124043, PDF,   
作者: 脱臣德, 罗 登, 肖大恒, 张勇伟：湖南华菱湘潭钢铁有限公司技术质量部，湖南 湘潭；武会宾：北京科技大学钢铁共性技术协同创新中心，北京
关键词: EH460钢；热变形行为；真应力–真应变曲线；本构方程；热加工图；EH460 Steel； Hot Deformation Behavior； True Stress-True Strain Curves； Constitutive Equation； Hot Processing Map
摘要: 利用Gleeble-1500热模拟试验机对EH460钢进行热压缩试验以分析该钢的热变形行为，变形温度为900℃~1150℃，变形速率为0.01~10 s−1。结果表明：从EH460钢的真应力–真应变曲线可知：其主要变形机制有加工硬化、动态回复和动态再结晶，且流变应力随变形温度的增大而减小，随变形速率的增大而增大；通过构建本构方程计算出不同变形条件下的流变应力，预测值与试验值的相关系数为0.994，平均相对误差为4.498%，相关性较好；通过分析热加工图得出EH460钢适合热加工的参数区间主要为950℃~1080℃、0.1~10 s−1、1040℃~1080℃、0.01~0.1 s−1和1130℃~1150℃、0.01~0.1 s−1。
Abstract: The hot compression test of EH460 steel was carried out on Gleeble-1500 thermal simulator to investigate the hot deformation behavior of the steel. The deformation temperature was 900˚C~ 1150˚C and the deformation rate was 0.01~10 s−1. The results show that the main deformation mechanisms of EH460 steel are work hardening, dynamic recovery and dynamic recrystallization from the true stress-true strain curves. The flow stress decreases with the increase of deformation temperature and increases with the increase of strain rate. The flow stress under different deformation conditions is calculated by constructing the constitutive equation. The correlation coefficient between the predicted value and the experimental value is 0.994 and the average relative error is 4.498%. The correlation is good. By analyzing the hot processing map, it is concluded that the parameters suitable for hot working of EH460 steel are mainly 950˚C~1080˚C, 0.1~10 s−1, 1040˚C~1080˚C, 0.01~0.1 s−1 and 1130˚C~1150˚C, 0.01~0.1 s−1.
文章引用：脱臣德, 罗登, 肖大恒, 张勇伟, 武会宾. 海洋平台用EH460钢热变形行为研究[J]. 材料科学, 2022, 12(4): 409-418. https://doi.org/10.12677/MS.2022.124043

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