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首页> 外文会议>Pacific Rim International Conference on Advanced Materials and Processing(PRICM 5) pt.1; 20041102-05; Beijing(CN) >Continuous Casting of Magnesium Billets for Semi-Solid Processing
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Continuous Casting of Magnesium Billets for Semi-Solid Processing

机译：连续铸造镁锭用于半固态加工

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摘要

Semi-solid processing is recognized as an attractive alternative method for the near net-shape production of engineering components. Although there has been a significant progress in semi-solid processing of aluminum alloys, very limited information is available on semi-solid processing of magnesium alloys, except for the thixomolding process. Continuous casting process has been utilized to produce the billets with the desirable cross-section at a reduced production cost for many metals, such as steel, copper and aluminum alloys. It has also been commercially utilized to produce the aluminum billets with non-dendritic microstructure for subsequent thixocasting process. However, continuous casting of magnesium billets for semi-solid processing has not yet been commercialized due to the difficulties involved in casting of magnesium alloys. In the present study, a continuous casting process has been developed for the production of the cylindrical billets of magnesium alloys for the subsequent thixocasting process. In order to obtain the desired non-dendritic microstructure with an excellent degree of homogeneity both in microstructure and composition, an electromagnetic stirring system has been utilized. A continuous casting process has been proven to be an efficient way to produce the high quality billets of magnesium alloys for semi-solid processing. A prototype air conditioner cover was produced using the continuously cast billets of AZ91 alloy.
机译：半固态加工被认为是近净形工程零件生产的一种有吸引力的替代方法。尽管在铝合金的半固态加工方面已经取得了重大进展，但是除了触模成型工艺以外，关于镁合金的半固态加工的信息非常有限。对于许多金属，例如钢，铜和铝合金，已经采用连续铸造工艺以降低的生产成本生产出具有所需横截面的钢坯。它也已经商业化地用于生产具有非枝晶微观结构的铝坯，用于随后的触变铸造工艺。然而，由于在铸造镁合金方面存在困难，用于半固态加工的镁锭的连续铸造尚未商业化。在本研究中，已经开发了一种连续铸造工艺，用于生产镁合金圆柱坯，用于随后的触变铸造工艺。为了获得具有优异的微观结构和组成均一度的所需非树枝状微观结构，已经使用了电磁搅拌系统。连续铸造工艺已被证明是生产用于半固态加工的高质量镁合金坯料的有效方法。使用AZ91合金的连续铸造坯料生产了原型空调盖。

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