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首页> 外文会议>2006 BIMW >Observation of As-cast Microstructure Feature of Al Sheet Used for Can Manufacturing with High Forming Properties
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Observation of As-cast Microstructure Feature of Al Sheet Used for Can Manufacturing with High Forming Properties

机译：高成形性罐制造用铝板铸态组织特征的观察

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The as-cast microstructure feature of Al sheet with high forming properties used for pressure can manufacturing pre-treated by different melt-treatment technique was observed and analyzed by SEM, EDAX, TEM and selected area electron diffraction (SAED), etc. It was found that the oxide inclusions in Al sheet were mainly γ -Al_2O_3, and the Fe-rich impurity phases in the sheet mainly Al_3Fe, Tl(Al_(12)Fe_3Si) or (AlFeSiRE). The crystal structure of (AlFeSiRE) phase was too complicated to be determined. The effect of melt-treatment technique on the as-cast microstructure of the sheet was remarkable. There were a number of oxide inclusions in the Al sheet before or after conventional melt-treatment, which distributed non-uniformly and gathered together in larger block shape with the size of about 10-40 μm. The Fe-rich impurity phases in the sheet were mainly Al_Fe and T1, and a few of the meta-stable phase Al_6Fe existed in the sheet. These Fe-rich impurity phases appeared in a coarse, long needle/flake or skeletal form, and were easily to gather together with oxide inclusions. When the Al sheet was treated by high-efficient melt-treatment, the amout of oxide inclusions was decreased obviously, and these inclusions distributed more uniformly in the tiny granular form (about or less than 4 μ m). The Fe-rich impurity phases were mainly (AlFeSiRE), and a small amount of Al_3Fe phases also existed in the material. The (AlFeSiRE) phases distributed uniformly along grain boundary in tiny group/sphere or short stick form. No congregation of Fe-rich phases with oxide inclusions was found in the material.
机译：通过SEM，EDAX，TEM和选择区域电子衍射（SAED）等观察和分析了用于压力罐制造的具有较高成形性能的Al片材的铸态组织特征，该片材通过不同的熔融处理技术进行了预处理。发现铝板中的氧化物夹杂物主要为γ-Al_2O_3，铝板中的富铁杂质相主要为Al_3Fe，Tl（Al_（12）Fe_3Si）或（AlFeSiRE）。 （AlFeSiRE）相的晶体结构太复杂，无法确定。熔融处理技术对片材的铸态微观结构的影响是显着的。在常规熔融处理之前或之后，Al片中存在许多氧化物夹杂物，它们不均匀分布并聚集在一起，形成较大的块状，尺寸约为10-40μm。薄板中的富Fe杂质相主要为Al_Fe和T1，薄板中存在少量亚稳定相Al_6Fe。这些富铁杂质相以粗的，长的针状/片状或骨架形式出现，并且容易与氧化物夹杂物聚集在一起。通过高效熔融处理对铝板进行处理后，氧化物夹杂物的含量明显降低，这些夹杂物以细小颗粒状（约小于4μm）更均匀地分布。富铁杂质相主要为（AlFeSiRE），材料中也存在少量的Al_3Fe相。 （AlFeSiRE）相沿晶粒边界均匀分布，呈细小群/球形或短棒状。在该材料中未发现富铁相与氧化物夹杂物的聚集。

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