High Temperature Mechanical Property of 09CrCuSb Steel Slab

The high temperature mechanical properties of 09CrCuSb steel billet were tested by the hot tensile test technique with Gleeble-3500 system.The stress-strain curve,high temperature strength,thermo-plasticity and plastic modulus with temperature in the range of 650～1 300 ℃were obtained.The results show that in the stress-strain curve,the peak stress decreases with the increase of the test temperature.When the test temperature is higher than 700 ℃,a stress platform appears in the stress-strain curve.The high temperature strength of continuous casting slab sample is poor,and with the increase of temperature,its high temperature strength tends to decrease.At the strain rate of 2.4×10^-3/s,there are two brittle temperature ranges.The range of brittleness temperature Ⅰ is 1 200 ℃～melting point,and he range of brittleness temperature Ⅲ is 700～800 ℃.In the range of 825～1 250 ℃, 09CrCuSb steel billet shows good thermoplasticity,and its section shrinkage rate is more than 80%.The high temperature plastic modulus of 09CrCuSb steel slab is less than 660.099 MPa when temperature is in range of 675～1 300 ℃.