Development and Application of Mould with Chamfered Corners for Continuous Casting of Slabs
In order to eliminate transverse corner cracks in slabs,formation mechanism of transverse corner cracks was analyzed in Shouqin.On the basis of the analysis,a design of one kind of mould with chamfered corners was proposed to modify the 2D heat transfer conditions at slab corners and so to elevate slab corner temperature in unbending zone.The numerical simulation results showed that temperature at chamfered slab corners increased remarkably and the concentration zone of Z direction tensile stress and equivalent strain at chamfered corners were eliminated compared with slabs with square corners.Industrial production data showed that in comparison with square corner slabs,temperature at chamfered corners of slabs increased form 810-855℃ to 901-932℃ in the unbending zone,which is higher than the temperature of low ductility trough.Therefore,the transverse corner cracks were improved and crack index decreased from 10.6% to 0.6%,which showed a very significant effect to remove slab transverse corner cracks.Now the moulds with chamfered corners have been applied as a regular measure in Shouqin to eliminate transverse corner cracks in slabs of all steel grades.
mould with chamfered corner continuous casting of slab transverse corner cracks
LI Benhai WANG Wenjun ZHU Zhiyuan LIU Yang WANG Yulong GUAN Chunyang WANG Weihua
Technical Research Institute Shougang,No.69,Yangzhuang Street,Shijingshan District,Beijing,100043 Qinhuangdao Shouqin Metal Materials Co.,Ltd.,Qinhuangdao,Hebei Province,066326
国际会议
Asia Steel International conference 2012(第五届亚洲钢铁大会)
北京
英文
1-9
2012-09-23（万方平台首次上网日期，不代表论文的发表时间）