Study of Crack in Continuous Casting Ingot of Q235 Wide Plate
The continuous casting ingot of Q235 wide plate was investigated by the optical microscopy,scanning electron microscopy and energy spectrum analysis.It was found that lots of Non-metallic inclusions exist in the ingot,and they are the internal cause for cracking of the ingot.Based on the results of the thermal simulation experiment,it was confirmed that cracks in the ingot were heat cracks formed in the temperature of more than 950℃.