Semi-solid Thixoforming of Al-Mg-Si Alloys

Tian Zhanfeng Xu Jun Yang Bicheng Zhang Zhifeng Shi Likai

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Semi-solid Thixoforming of Al-Mg-Si Alloys
Issue 8, Pages: 504-506(2005)
Published： 2005 ，
DOI：

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[1]田战峰,徐骏,杨必成,张志峰,石力开.Al-Mg-Si合金半固态触变成形研究[J].特种铸造及有色合金,2005(08):504-506+448.

Tian Zhanfeng Xu Jun Yang Bicheng Zhang Zhifeng Shi Likai. Semi-solid Thixoforming of Al-Mg-Si Alloys. [J]. Special Casting & Nonferrous Alloys (8):504-506(2005)
[1]田战峰,徐骏,杨必成,张志峰,石力开.Al-Mg-Si合金半固态触变成形研究[J].特种铸造及有色合金,2005(08):504-506+448. DOI：

Tian Zhanfeng Xu Jun Yang Bicheng Zhang Zhifeng Shi Likai. Semi-solid Thixoforming of Al-Mg-Si Alloys. [J]. Special Casting & Nonferrous Alloys (8):504-506(2005) DOI：

摘要

以水泵盖为目标零件

在自行建立的半固态触变成形试验线上使用A357合金和新开发的半固态专用铝合金Al-6Si-2Mg进行了半固态触变压铸试验研究。对这两种合金在半固态坯料制备、二次加热及半固态压铸中的显微组织及工艺性进行了比较。结果表明

Al-6Si-2Mg合金在触变成形过程中均表现出更好的工艺可控性

其半固态压铸件热处理后的性能为σb=335MPa

σs=305MPa

δ5=3%

强度高于A357

伸长率与铸态A357合金相当。试验最终获得了充型完好、性能优异、组织均匀的半固态压铸件。

Abstract

We have developed a thixoforming pilot-plant-scale equipment to perform semi-solid thixoforming for pump lid using A357 alloy and a new developed Al-6Si-2Mg alloy.The microstructure and mechanical properties of the two alloys were compared during the process of SSM billets preparation

reheating and semi-solid die casting.It was revealed that the Al-6Si-2Mg alloy exhibits better processing controllability during thixoforming compared with the A357 alloy.The properties of heat treated components by semi-solid thixoforming is tensile strength of 335 MPa

yield strength of 305 MPa and elongation of 3%[WT]

higher than A357 alloy in strength

equal to A357 alloy in elongation.Finally

auto parts produced by semi-solid die casting with ideal filling

excellent properties and uniform microstructure were achieved.