• CN:11-2187/TH
  • ISSN:0577-6686

›› 2006, Vol. 42 ›› Issue (12): 110-115.

• 论文 • 上一篇    下一篇

方、圆坯高速连铸结晶器内壁的理想纵断面曲线和锥度曲线

盛义平;孔祥东;刘景元;杨永利   

  1. 燕山大学机械工程学院;唐山钢铁股份有限公司第二炼钢厂
  • 发布日期:2006-12-15

OPTIMAL LONGITUDINAL PROFILE CURVE AND TAPER CURVE OF THE BILLET AND ROUND MOLD FOR HIGH SPEED CONTINUOUS CASTING

SHENG Yiping;KONG Xiangdong;LIU Jingyuan;YANG Yongli   

  1. College of Mechanical Engineering, Yanshan University Second Steel-making Mill of Tangshan Iron and Steel Co. Ltd.
  • Published:2006-12-15

摘要: 针对结晶器锥度设计必须考虑结晶器的热膨胀和凝固壳的收缩,理想的结晶器应能够完全适应凝固壳的收缩,使凝固壳与结晶器既紧密接触、又不发生干涉的问题,根据方、圆坯结晶器内凝固壳收缩的特性,推导出高速连铸方、圆坯结晶器内壁的纵断面曲线和锥度曲线的设计计算公式。这些公式明确地反映了浇注钢种、冷却条件和拉坯速度的影响。结晶器的纵断面曲线由从结晶器上口至钢液液面附近的直线段和其下部的曲线段相切组成,锥度连续变化,消除钢液液面脉动的影响。在钢液液面附近,结晶器的纵断面曲线非常接近于抛物线。用这些公式为某厂设计的154.5 mm×152.5 mm结晶器,拉坯速度达到了3.1 m/min,超过了设计要求的2.7 m/min。

关键词: 方;圆坯结晶器, 计算, 理想锥度曲线, 理想纵断面曲线, 设计

Abstract: An adequate mold taper design must consider both mold thermal distortion and solidified shell shrinkage. The optimal mold should adapt fully the solidified shell shrinkage, and allow the sufficient contact between solidified shell and mold without causing excessive mold-shell interference. Considering the shrinkage characteristic of solidified shell in the billet and round mold, the design and calculation formula about the opti-mal longitudinal profile curve and the optimal taper curve of the billet and round mold for high speed continuous casting are obtained. It clearly embodies the effects of solidified shell shrinkage, steel grade, cooling condition and casting speed. The optimal longitudinal profile curve consists of the beeline from the intake of mold to the site close to metal level and the curve under the beeline, which are tangent each other, making the taper changing continuously and avoiding the effect of the fluctuation of metal level. Close to metal level, the optimal longitudinal profile curve is very approximate to a parabola. The mold with size of 154.5 mm×152.5 mm, is designed for one Iron and Steel Co. Ltd.. The maximal casting speed of the mold is 3.1 m/min, which exceeds the desired value of 2.7 m/min.

Key words: Billet and round mold, Calculation, Design, Optimal longitudinal profile curves, Optimal taper curves

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