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首页> 外文期刊>Materials Science and Technology: MST: A publication of the Institute of Metals >Comparative study on effects of microstructures of hot rolled and twin roll casting 1235 aluminium alloy on surface quality of aluminium foils produced
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Comparative study on effects of microstructures of hot rolled and twin roll casting 1235 aluminium alloy on surface quality of aluminium foils produced

机译：热轧和双辊铸造1235铝合金微观组织对生产的铝箔表面质量影响的比较研究

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摘要

Twin roll casting is an attractive technology for producing aluminium sheets for foils. But, surface defects, such as matte defects, may occur on aluminium foils produced in this way. However, it is not the case on aluminium foils produced by traditional hot rolled process. Optical microscopy, scanning electronic microscopy, energy spectrum and transmission electronic microscopy were used to investigate the effects of the microstructures of the twin roll cast and hot rolled aluminium alloy sheet for foils on the surface defects of the foils produced. It is discovered that central segregation band and surface microsegregation band in twin roll casting aluminium sheet may result in a non-uniformly distributed secondary Al-Fe and Al-Fe-Si particles in workpieces in a lower reduction pass. These non-uniformly distributed Al-Fe and Al-Fe-Si particles and microporosities in a size of several microns generated in solidification process of twin roll casting are the main cause for the surface matte defects of the aluminium foils produced.
机译：双辊铸造是生产箔用铝板的一种有吸引力的技术。但是，以这种方式生产的铝箔可能会出现表面缺陷，例如无光泽缺陷。但是，通过传统的热轧工艺生产的铝箔却并非如此。使用光学显微镜，扫描电子显微镜，能谱和透射电子显微镜来研究用于箔的双辊铸和热轧铝合金板的微观结构对所生产的箔的表面缺陷的影响。发现双辊铸铝板中的中心偏析带和表面微观偏析带会以较低的还原通过率导致工件中的二次Al-Fe和Al-Fe-Si颗粒不均匀分布。在双辊铸造的凝固过程中产生的这些不均匀分布的Al-Fe和Al-Fe-Si颗粒以及几微米大小的微孔是所生产的铝箔的表面无光泽缺陷的主要原因。

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