Scientific Research and Practice on the Machinable Hypereuteetic Al-Si Alloys Material 891189
This paper studies systematically the machinability -of Al-18-20%Si hypereutectic alloy. The results indicate: in squeeze casting, adopting high temperature pouring, high cooling Speed, single-modificating with p and T6 heat treating can make this material free cutting only using common carbide tool. Furthermore, the automobile pistons of this material can be produced in batches.
The single-modlficating with p in squeeze casting may refine the crystals of primary si to 25 urn below and the eutectic si can also be refined and spheroidized. Therefor, pistons of Al-18%si alloy have excellent mechanical and physical properties.
This paper discusses and analyzes the growth morphology and mechanism of si crystals.
Author(s):
Xie Zhichso, Hu Hua, Zhao Yutao
Affiliated:
Jian Su Institute of Technology, China
Pages: 8
Event:
5th International Pacific Conference on Automotive Engineering
Related Topics:
Heat treatment
Pistons
Casting
Alloys
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