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Microstructure and impact properties of slow injection A356 die castings with partial squeeze
Author(s): BAI Yanfei, ZHAO Haidong, LI Yuanyuan, KANG Zhixin
Pages: 442-
450
Year: 2010
Issue:
3
Journal: The Chinese Journal of Nonferrous Metals
Keyword: A356压铸件; 慢压射压铸; 微观组织; 冲击性能;
Abstract: 研究局部挤压慢压射A356压铸件不同部位处的微观组织及冲击性能.结果表明:铸态下共晶Si粒子大多为纤维状或长针状,呈不均匀的网状分布,冲击吸收功在1.17~2.35 J的范围内变化后;经T6热处理后,团簇状Al-Si共晶相明显减少,共晶Si粒子呈现出粒状或短棒状,且细小均匀,Si粒子的长宽比和面积分数都有显著降低,冲击吸收功在1.45~3.80 J的范围内变化,比铸态有明显提高.分析2种情况下不同...
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