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| Research and Application on Design Technology for Taper of Thin Slab Continuous Casting Mould |
| TAO Hong-biao,L Xiao-jun,XI Chang-suo,ZHANG Hui,WU Ye-ming,GAN Yong |
| National Engineering and Research Center of Continuous Casting Technology, CISRI, Beijing 100081, China |
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Abstract Aiming at improving service life of mould and surface quality of slab, effect of width and depth of mould funnel zone, deflection value and wear of narrow-face copper plate on taper distribution in the altitude direction was researched firstly by creating some models to compute funnel zone self taper, central taper and local taper of mould. Secondly, the design idea was put forward that funnel zone self taper and lengthwise distributions of local taper should match with solidification shrinkage of slab. Finally, optimization design on cavity configuration of wide-face copper of thin slab continuous casting mould and controlling process of narrow-face copper taper was carried out, which provided theoretical reference for optimizing mould operation process and managerial system. Based on above mentioned research work, a new mould suitable to FTSC process was developed. A lot of industry production trails were conducted using this mould. The results show that additional deflection value of narrow-face copper plate can be reduced from 12mm to 7mm while producing thin slab whose width is 1520mm. Service life of narrow-face copper plate is improved obviously. The maximum amount of wear of narrow-face copper plate is reduced from 5mm to 2mm after 22500 tons liquid steelwere cast. Besides, occurrence of slab narrow-face depression and surface longitudinal crack can be controlled by using this new mould.
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Received: 23 December 2010
Published: 16 January 2012
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2012, Vol. 47 
