Development of aluminum rheo-extrusion process using semi-solid slurry at low solid fraction

An aluminum extrusion process is mainly used to fabricate long tubes, beams and rods for various applications. However, this process has a high production cost due to the need for investment of high-pressure machinery. The objective of this work is to develop a new semi-solid extrusion process using...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2010-09, Vol.20 (9), p.1763-1768
Main Authors: RATTANOCHAIKUL, T., JANUDOM, S., MEMONGKOL, N., WANNASIN, J.
Format: Article
Language:English
Subjects:
aluminum alloys
Aluminum base alloys
Extrusion
Extrusion rate
Financing
gas induced semi-solid (GISS)
GISS
Manufacturing engineering
Plungers
rheo-extrusion
Rods
semi-solid metal
Semi-solid processing
Slurries
半固态挤压工艺
半固态浆料
半固态金属
固相率
连接速度
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Summary:An aluminum extrusion process is mainly used to fabricate long tubes, beams and rods for various applications. However, this process has a high production cost due to the need for investment of high-pressure machinery. The objective of this work is to develop a new semi-solid extrusion process using semi-solid slurry at low solid fractions. A laboratory extrusion system was used to fabricate aluminum rods with the diameter of 12 ram. The semi-solid metal process used in this study was the gas induced semi-solid （GISS） technique. To study the feasibility of the GISS extrusion process, the effects of extrusion parameters such as plunger speed and solid fi-action on the extrudability, microstructure, and mechanical properties of extruded samples were investigated. The results show that the plunger speed and solid fraction of the semi-solid metal need to be carefully controlled to produce complete extruded parts.
ISSN:1003-6326
DOI:10.1016/S1003-6326(09)60371-X