连铸板坯凝固壳形貌测试及模拟  

Testing and Simulating Study on the Solid Shell Shape of Slab Continuous Casting

作　　者：陈嫚丽[1] 陈登福[1] 张立峰 王青峡[1] 高文星[1] 龙木军[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400030 [2]密苏里科技大学材料科学与工程系,美国密苏里654090330

出　　处：《过程工程学报》2009年第S1期390-394,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50774105)

摘　　要：通过射钉法在铸坯横断面1/2,1/4,1/8三个位置测量170mm×1400mm断面AH36钢在1.25和1.35m/min两个拉速下的连铸板坯凝固坯壳厚度,根据凝固定律,利用铸坯凝固坯壳厚度确定液相穴长度以及凝固终点.应用板坯连铸二次冷却仿真软件对其进行凝固过程模拟计算,得到凝固壳生长形貌,横向和纵向凝固壳厚度变化趋势,以及横向内弧表面温度.对比测量结果与模拟结果,验证在同一位置凝固壳厚度基本一致,铸坯最先凝固的位置为1/4处,凝固末端位于1/8处.对连铸板坯凝固壳形貌的研究为二冷制度的设计以及优化提供了有效依据.The solid shell thickness of AH36 slab with cross section of 170 mm ×1400 mm was measured by the nail-shooting test at the speeds of 1.25 and 1.35 m/min. The test positions located at the width direction of 1/2, 1/4 and 1/8. And the liquid core length and solidification ending were calculated by solidification law. Furthermore, using the software of secondary cooling simulation in slab casting to simulate the solidification process of AH36 slab, the solid shell shape and the change trend of solid shell thickness, and the temperature distribution on intrados of the slab in the width direction were studied. The results showed that the measuring results were close to the simulating results, the first solidification position at 1/4 position, and the solidification ending at 1/8 position. The research results provided a good foundation to design and optimize the secondary cooling system.

关 键 词：射钉法 凝固壳形貌 凝固壳厚度 凝固终点 

分 类 号：TF777.1[冶金工程—钢铁冶金]