Effect of holding pressure on density and cooling rate of cast Al-Si alloy during additive pressure casting

被引：4
作者：
Fan, Zhen [1 ]
Song, Wei [2 ]
Zhang, Hua-rui [1 ]
Zhou, Bao-sheng [2 ]
Wu, Xiao-yan [1 ]
Jia, Li-na [1 ]
Zhang, Hu [1 ,3 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Beihang Univ, Qingdao Res Inst, Qingdao 266000, Peoples R China
[3] Beihang Univ, Ningbo Inst Technol, Ningbo 315832, Peoples R China
来源：
CHINA FOUNDRY | 2019年 / 16卷 / 06期
关键词：
holding pressure; cast Al-Si alloy; density; cooling rate; mechanical properties; additive pressure casting; MECHANICAL-PROPERTIES; A356; ALLOY; MICROSTRUCTURE; PARAMETERS; BEHAVIOR; VACUUM; SR;
D O I：
10.1007/s41230-019-9085-7
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The cast Al-Si alloy was fabricated using the Additive Pressure Casting (APC) method. The effects of holding pressure from 50 to 400 kPa on the density, cooling rate, and mechanical properties of the alloy, and the corresponding mechanism were discussed. The results indicate that the application of high holding pressure (300 kPa) enhances the feeding ability of the alloy, leading to an increase of the density. Meanwhile, the cooling rate of the alloy is increased by 100%. In addition, the tensile testing results show that the increase of holding pressure from 50 to 300 kPa improves the tensile strength and elongation of the alloy by 6.2% and 81.3%, respectively. However, excessive holding pressure (400 kPa) might lower the density and cooling rate of the alloy due to the feeding channels being blocked.
引用
收藏
页码：363 / 370
页数：8
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