ELECTROMAGNETIC REFINING OF ALUMINUM-ALLOYS BY THE CREM PROCESS .1. WORKING PRINCIPLE AND METALLURGICAL RESULTS
ELECTROMAGNETIC REFINING OF ALUMINUM-ALLOYS BY THE CREM PROCESS .1. WORKING PRINCIPLE AND METALLURGICAL RESULTS
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DOI：
10.1007/bf02655919
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发表时间：
1989-10-01
期刊：
影响因子：
--
通讯作者：
VIVES, C
中科院分区：
文献类型：
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作者：
VIVES, C
本文第一部分介绍了一种新的电磁连铸工艺的工作原理。该过程的主要特点是（1）池中存在强电磁驱动的强制对流，这促进了精细等轴结构的产生，以及（2）偏析区的厚度趋于零。局部测量方法用于研究铝合金坯料槽内的电磁和流体动力学现象。此外，还介绍了隔离表面层的晶粒尺寸和厚度随电功率输入的变化。综上所述，这项新技术具有避免添加晶粒细化剂并大幅减少剥头皮操作的优点。
In the first part of this paper, the working principle of a new electromagnetic continuous casting process is described. The main peculiarities of this process are (1) the presence in the sump of a strong electromagnetically driven forced convection, which promotes the production of a fine equiaxed structure, and (2) the fact that the thickness of the segregation zone tends toward zero. Local measurement methods are applied to the study of electromagnetic and hydrodynamic phe-nomena inside the sump of aluminum alloy billets. Further, the evolution of both the grain size and the thickness of the segregated surface layer with the electric power input is presented. In summary, this new technology presents the advantages of avoiding the addition of grain refiners and substantially reducing the scalping operation.