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材料工程  2014 

AZ91D镁合金强制对流流变压铸组织与性能

DOI: 10.11868/j.issn.1001-4381.2014.10.001, PP. 1-5

Keywords: 强制对流搅拌装置,流变压铸,组织与性能,热处理

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Abstract:

研究了流变压铸成形和传统压铸工艺下AZ91D镁合金连接压铸件的组织特征,分析了流变压铸过程中半固态浆料的形成和凝固行为,测试了FCR工艺下流变压铸拉伸件的力学性能。结果表明FCR工艺下的流变压铸成形工艺不仅可以获得晶粒细小、形貌圆整的半固态组织,而且能够明显改善传统压铸成型件中的气孔缺陷,提高组织致密度。与传统压铸件相比,流变压铸拉伸件的抗拉强度和伸长率都有了明显的提高;T6热处理能进一步强化流变压铸拉伸件的性能,其抗拉强度和伸长率分别为286MPa和6.1%。

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