高强度钢材低温力学性能试验研究与预测模型

蔡骜, 陈满泰, 左文康, 段立平, 赵金城

Experimental Study and Prediction Model of Low Temperature Mechanical Properties of High-Strength Steel

CAI Ao, CHEN Mantai, ZUO Wenkang, DUAN Liping, ZHAO Jincheng

表1 常温与低温环境下HG785钢材力学性能指标

Tab.1 Mechanical properties of HG785 steel at ambient and low temperatures

试样 t/ mm T/ ℃ ET/ GPa ET/ ETa IE,P fyT/ MPa fyT/ fyTa Ify,P fuT/ MPa fuT/ fuTa Ifu,P IE,Test/ IE,P Ify,Test/ Ify,P Ifu,Test/ Ifu,P H6T25 6 25 186 1.00 1.00 615 1.00 1.00 699 1.00 1.00 1.000 1.000 1.000 H6T-20 6 -20 190 1.02 1.08 695 1.13 1.06 833 1.19 1.07 0.951 1.062 1.110 H6T-40 6 -40 205 1.10 1.12 747 1.22 1.10 835 1.20 1.11 0.987 1.107 1.073 H6T-60 6 -60 214 1.15 1.16 726 1.18 1.14 855 1.22 1.16 0.988 1.039 1.056 H6T-75 6 -75 226 1.21 1.20 756 1.23 1.17 847 1.21 1.20 1.009 1.053 1.014 H8T25 8 25 193 1.00 1.00 627 1.00 1.00 704 1.00 1.00 1.000 1.000 1.000 H8T-20 8 -20 201 1.04 1.08 686 1.10 1.06 799 1.14 1.07 0.967 1.029 1.057 H8T-40 8 -40 210 1.09 1.12 650 1.04 1.10 745 1.06 1.11 0.972 0.945 0.950 H8T-60 8 -60 238 1.24 1.16 662 1.06 1.14 790 1.12 1.16 1.061 0.929 0.969 H8T-75 8 -75 218 1.13 1.20 729 1.16 1.17 865 1.23 1.20 0.940 0.996 1.027 平均值 0.988 1.016 1.026 变异系数 0.034 0.054 0.049