热变形对A356金属型铸件性能和组织的影响

黄龙辉; 杨弋涛; 刘立坤; 张轶群; 邵光杰

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热变形对A356金属型铸件性能和组织的影响
Effects of Hot Deformation on Microstructure and Properties of Permanent Mold A356 Aluminum Alloy Castings
2009年29卷第4期页码：381-383
纸质出版日期： 2009 ，
DOI：

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[1]黄龙辉,杨弋涛,刘立坤,张轶群,邵光杰.热变形对A356金属型铸件性能和组织的影响[J].特种铸造及有色合金,2009,29(04):381-383+293-294.

Huang Longhui, Yang Yitao, Liu Likun, et al. Effects of Hot Deformation on Microstructure and Properties of Permanent Mold A356 Aluminum Alloy Castings[J]. Special Casting & Nonferrous Alloys, 2009,29(4):381-383.
[1]黄龙辉,杨弋涛,刘立坤,张轶群,邵光杰.热变形对A356金属型铸件性能和组织的影响[J].特种铸造及有色合金,2009,29(04):381-383+293-294. DOI：

Huang Longhui, Yang Yitao, Liu Likun, et al. Effects of Hot Deformation on Microstructure and Properties of Permanent Mold A356 Aluminum Alloy Castings[J]. Special Casting & Nonferrous Alloys, 2009,29(4):381-383. DOI：

摘要

热变形会改变金属型铸件的力学性能和组织

针对铸件相同部位的不同变形量及不同部位的相同变形量

研究了其热变形前后性能和组织的差异。结果表明

热变形不仅可以有效地消除铸造缺陷

而且使共晶硅颗粒呈有序分布

从而提高了金属型铸件的伸长率

试样同一部位的伸长率从铸态的2.1%提高到热变形态的11.0%;不同部位的试样在经过变形量为20%的热变形后

伸长率分别提高到6.1%、7.86%和8.7%。

Abstract

Microstructure and mechanical properties of permanent mold A356 aluminum alloy casting before and after hot deformation were investigated to examine the effects of hot deformation by investigating the same parts at varied deformation rate and the different ones at the same deformation rate. The results indicate that elongation of the permanent mold castings is improved as a result of effectively eliminating casting defects in microstructure and making eutectic Si particle distribute orderly by hot deformation. The elongation of the permanent mold casting is increased from 2.1% in as-cast state to 11% in hot deformed state

and at a given 20% hot deformation rate

that at different positions of the castings are increased by 6.13%

7.76% and 8.72%

respectively

compared with that of as-cast ones.