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• 凝固与浇铸 • 上一篇    下一篇

厚规格高合金钢坯堆垛缓冷工艺开发

王卫华1,2,李战军1,2,初仁生1,2,陈 霞1,2   

  1. 王卫华1,2,李战军1,2,初仁生1,2,陈 霞1,2
  • 接受日期:1900-01-01 出版日期:2019-10-05

Development of stacking and slow-cooling technology for thick high alloy slab

  • Accepted:1900-01-01 Online:2019-10-05

摘要: 针对某厂高合金钢裂纹发生率较高但尚无缓冷坑或其他缓冷措施的状况,利用有限元软件ANSYS,对该厂板坯连铸机生产的尺寸为400 mm×2 000 mm×3 000 mm的738 H塑料模具钢坯,进行了堆冷过程温度场有限元模型计算。对该厂模具钢坯进行了96h堆冷测温试验,并用现场实测温度对数值模拟结果进行校核。依据校核过的堆冷温度场有限元模型,开发了适合该厂的连铸坯堆垛缓冷工艺,很好地解决了该厂连铸坯无缓冷措施的问题,有效防止了高合金钢连铸坯裂纹和迟缓裂纹的产生,使得高合金钢连铸坯裂纹控制合格率达到100 %。

关键词: 堆垛缓冷, 高合金钢, 连铸坯, 有限元, 模型

Abstract: In view of the fact that the crack rate of high alloy steel in a factory is relatively high but there is no slow-cooling pit or other slow-cooling measures,the temperature finite element model of 738H plastic mould steel slab produced by slab continuous caster in this factory with the size of 400 mm×2 000 mm×3 000 mm was calculated by using the finite element software ANSYS. A 96h stacking and slow-cooling temperature measurement experiment was carried out on the plastic mould steel slab of the plant,and the results of numerical simulation were checked by the field-measured temperature. Based on the checked finite element model of stacking cooling temperature field,a stacking slow-cooling process suitable for the factory for continuous casting slab was developed,which could solve the problem well of no delay facilities for continuous casting slab,cracks and slow cracks of high alloy steel slab had been prevented effectively,and the qualified rate of crack control of high alloy steel continuous casting slab could be reached 100%.

Key words: stacking and slow-cooling, high alloy steel, continuous casting slab, finite element, model