锡磷青铜薄板坯水平电磁连铸技术的优化研究

Optimization of Electromagnetic Horizontal Continuous Casting Technology of Phosphor Bronze Slab

摘要:

对锡磷青铜薄板坯水平连铸的行波电磁搅拌技术进行了优化研究，提出了在搅拌器的端部放置硅钢片、改变搅拌器的长度以及减小搅拌器的端部电流强度等3种方法，来优化连铸薄板坯端部的流动和凝固过程，并采用数值模拟和工厂实验相结合的方法对其进行了分析。结果表明：相比其他2种方法，通过在行波搅拌器的端部放置硅钢片更有利于改善熔体端部的流动状况，当施加硅钢片的长度为150 mm时，熔体端部的强环流消失，连铸坯端部的凝固坯生长更加均匀，从而有利于防止连铸薄板坯边部的裂纹和偏析缺陷产生

Abstract:

In order to improve the edge quality of horizontal continuous casting phosphor bronze slab, three methods including applying silicon steel at ends of the traveling magnetic field stirrer, changing the length of traveling magnetic field stirrer, and reducing the ends current intensity of traveling magnetic field stirrer were proposed, and a numerical simulation method was used to study the flow and solidification process of continuous casting phosphor bronze slab. The results show that compared to the other two methods, the method of placing the silicon steel sheet on the edge of the traveling electromagnet stirrer is more beneficial to improve the melt flow. When the length of the silicon steel sheet is 150 mm, the strong flow at the melt ends disappears and the ends melt solidification process is more uniform, which is helpful to prevent the crack and segregation defect and improve the edge quality of continuous casting phosphor bronze slab.