Research and Application of Internal Quality Control Method for Slab Based on Stress Control during Solidification Process
To improve the internal quality control level of slab,the formation mechanism of internal defects in the slab is elaborated from the perspective of the influence of stress on the internal quality during the solidification process of the slab.The theory that the comprehensive stress state of the slab in the segments is the key factor affecting the in-ternal quality is proposed.By developing a secondary cooling water control model under extreme working conditions,the stress during the solidification process of the slab is reduced,and the maximum casting resistance has been reduced from 2 500 kN to 1 850 kN.The problem of low magnification intermediate cracks in the casting slab has been signifi-cantly improved.The low magnification detection center segregation of Class B 0.5-C 1.0 accounts for 98％,and in-termediate cracks below Class 0.5 account for 85％.The internal quality control level of the casting slab has been sig-nificantly improved.
万方数据
维普
