Influence of high pressure and manganese addition on Fe-rich phases and mechanical properties of hypereutectic Al-Si alloy with rheo-squeeze casting

被引：23

作者：

Lin, Chong ^{[1
,2
]}

Wu, Shu-sen ^{[2
]}

Lu, Shu-lin ^{[2
]}

Wu, He-bao ^{[1
]}

Chen, Han-xin ^{[1
]}

机构：

[1] Wuhan Inst Technol, Hubei Prov Key Lab Chem Equipment Intensificat &, Wuhan 430205, Hubei, Peoples R China

[2] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & & Mould Technol, Wuhan 430074, Hubei, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2019年 / 29卷 / 02期

基金：

中国国家自然科学基金;

关键词：

high pressure; manganese; rheo-squeeze casting; hypereutectic Al-Si alloy; Fe-rich phases; mechanical properties; CONTAINING INTERMETALLIC COMPOUNDS; SLIDING WEAR BEHAVIOR; MICROSTRUCTURE; SOLIDIFICATION; IRON; PARAMETERS;

D O I：

10.1016/S1003-6326(19)64934-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The influence of high pressure and manganese addition on Fe-rich phases (FRPs) and mechanical properties of Al-14Si-2Fe alloy with rheo-squeeze casting (RSC) was investigated. The semi-solid alloy melt was treated by ultrasonic vibration (UV) firstly, and then formed by squeeze casting (SC). Results show that the FRPs in as-cast SC alloys are composed of coarse beta-Al-5 (Fe,Mn)Si, delta-Al-4(Fe,Mn)Si-2 and bone-shaped alpha-Al-15(Fe,Mn)(3)Si-2 phases when the pressure is 0 MPa. With RSC process, the FRPs are first refined by UV, and then the solidification under pressure further causes the grains to become smaller. The peritectic transformation occurs during the formation of alpha phase. For the alloy with the same composition, the ultimate tensile strength (UTS) of RSC sample is higher than that of the SC sample. With the same forming process, the UTS of Al-14Si-2Fe-0.8Mn alloy is higher than that of Al-14Si-2Fe-0.4Mn alloy.

引用

页码：253 / 262

页数：10

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