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Feasibility of semi-solid die casting of ADC12 aluminum alloy

Transactions of Nonferrous Metals Society of China 2010年第9期20卷 1756-1762页

作者： S.JANUDOM T.RATTANOCHAIKUL R.BURA PA S.WISUTMETHANGOON J.WANNASIN Department of Mining and Materials Engineering Faculty of EngineeringPrince of Songkla University Department of Industrial Engineering Faculty of Engineering Rajamangala University of Technology Srivijaya Department of Mechanical Engineering Faculty of EngineeringPrince of Songkla University

The feasibility of semi-solid die casting of ADC12 aluminum alloy was studied. The effects of plunger speed, gate thickness, and solid fraction of the slurry on the defects were determined. The defects investigated are gas and shrinkage porosity. In the experiments, semi-solid slurry was prepared by the gas-induced semi-solid （GISS） technique. Then, the slurry was transferred to the shot sleeve and injected into the die. The die and shot sleeve temperatures were kept at 180 ℃ and 250 ℃, respectively. The results show that the samples produced by the GISS die casting give little porosity, no blister and uniform microstructure. From all the results, it can be concluded that the GISS process is feasible to apply in the ADC12 aluminum die casting process. In addition, the GISS process can give improved properties such as decreased porosity and increased microstructure uniformity.

关键词： ADC12 aluminum alloys semi-solid die casting gas induced semi-solid (GISS) rheocasting

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Forming conditions of blisters during solution heat treatment of Al–Si alloy semi-solid die castings

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Rare Metals 2023年第11期42卷 3851-3858页

作者： Hong-Xing Lu Qiang Zhu Stephen P.Midson Wen-Ying Qu Fan Zhang Da-Quan Li National Engineering and Technology Research Center for Nonferrous Metal Matrix Composites General Research Institute for Nonferrous MetalsBeijing100088China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen518055China

In the present study,numerical simulation method was used to analyze the conditions,resulting in the formation of blisters during solution heat *** formation is considered to occur as the height of blister reaches 5μ*** effects of process parameters on the magnitude of the forming temperatures of blister(Tb)were *** kinds of Al-Si alloys were used to analyze the effect of mechanical properties of the alloys on blister forming *** results show that decreasing the initial pressure in gas hole,the long-short axial ratio of gas hole and the size of gas hole,as well as increasing the depth of gas hole and the strength of alloy are helpful to increase the critical temperature of forming *** conclusions are helpful for casters to understand the conditions controlling blister formation during solution heat treatment and take actions to avoid the blister defects.

关键词： Blister Forming condition semi-solid die casting Aluminum alloy

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