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金属学报  2002 

AZ91D镁合金近液相线铸造研究

, PP. 219-224

Keywords: 镁合金,近液相线铸造,微观组织

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Abstract:

采用近液相铸造的方法浇铸了镁合金AZ91D,并与液相铸造的组织进行了对比,通过不同铸模浇铸考察了冷却速率对组织的影响,研究了近液相线铸造时的静置时间对铸造组织的影响,实验结果表明,液相(600℃)铸造组织与常规铸造组织接近,高冷却速率促进了枝晶化,近液相线铸造方法有利于组织的细化和球化,但不如铝合金显著,增加冷却加速率有利于组织的细化,也促进了球化的趋势,并对近液相线组织的演变机理进行了初步探讨.

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