Showing papers in "Continuous Casting in 2013"
Journal Article•
TL;DR: In this article, the authors investigated the solidification shrinkage behavior of ultra-thick slab in the mould with different chamfering of the narrow face copper, and the finite element models of two-dimensional transient thermo-mechanical coupled were set up by means of ABAQUS software.
Abstract: To investigate the solidification shrinkage behavior of ultra-thick slab in the mould with different chamfering of the narrow face copper, the finite element models of two-dimensional transient thermo-mechanical coupled were set up by means of ABAQUS software. The temperature and stress distribution of slabs were calculated through the user subroutine. The effect of mould fluxes and air gap on heat transfer was taken into account comprehensively in the models. The numerical results show that: when the chamfering of mould narrow face copper is too large or too small, it is disadvantageous for the uniform distribution of the slab temperature. For the slab of 420 mm in thickness, the fillet radius of 24 mm makes the slab surface temperature distribution most uniform and the maximum plane principal stress distribution more reasonable, so that the corner transverse cracks will be greatly reduced.
3 citations
Journal Article•
TL;DR: In this article, the authors analyzed the effect of the water distribution in the second cooling zone on the heat loss rate per unit length of the mould and second cooling zones as well as the surface temperature gradient of the slab.
Abstract: Based on numerical calculation with Matlab,solidification heat transfer in slab continuous casting process is carried out,and the temperature field distribution of the slab varying with its thickness and distance to the meniscus of the mould is obtained.The fitting equation of the end position of the slab solidification with respect to the total water flow rate during secondary cooling process,superheat and casting speed is obtained.The effect of the water distribution in the second cooling zone on the heat loss rate per unit length of the mould and second cooling zone as well as the surface temperature gradient of the slab are analyzed.The results show that the change tendencies of the slab temperatures are obviously different at different cooling stages.With the increases in the superheat and casting speed and the decrease in the total water flow rate during secondary cooling process,the end position of the slab solidification increases.The effect of the casting speed on the end position of the slab solidification is more obvious,the effect of the total water flow rate during secondary cooling process is secondary,and the effect of the superheat on the end position of the slab solidification is small.The compromise between the decrement of the surface temperature gradient and the reduction of heat loss rate can be realized by properly adjusting the water distributions in the second cooling zone.The quality and energy storage of the slab are improved simultaneously in this way,and the energy saving of slab continuous casting process is realized.The work in this paper can provide some theoretical guidelines for the parameter designs and dynamic operations of the solidification process of slab continuous casting.
3 citations
Journal Article•
TL;DR: In this paper, the existing technology products status of on-line thermal wide-altering device was analyzed; and electric cylinder on online thermal wide altering technology on slab continuous casting mould was developed independently and has been used on slab continuously casting mould in a steel factory.
Abstract: The existing technology products status of on-line thermal wide-altering device was analyzed;and electric cylinder on-line thermal wide-altering technology on slab continuous casting mould was developed independently and has been used on slab continuous casting mould in a steel factory.System composition,working principle,technical index,main advantages,motion rule,control mode and achieved results of this new technology have been introduced.
2 citations