The high temperature mechanical properties of 30CrMo fine blanking steel continuous casting slab cooling from 1350 °C with 5 °C/s and 15 °C/s to 600-900 °C and tensioning are tested using Gleeble-3800 thermal simulator. The fracture morphology and microstructure of the tensile specimens are observed and analyzed by scanning electron microscopy

and the mechanism of deformation fracture in each temperature region is discussed. Results demonstrate that with the increase of cooling rate

the overall reduction of area of the slab decreases and the thermo-plasticity of the slab also decreases. The H brittleness temperature range of 30CrMo fine blanking steel is 650 ~750 °C

and raising the comer temperature of the slab in the straightening section of secondary cooling zone to above 800°C can effectively avoid the comer cracking.