Heat-flow-based analysis of surface crack formation during the start-up of the direct chill casting process: Part I. development of the inverse heat-transfer model

1996 ◽  
Vol 27 (1) ◽  
pp. 119-127 ◽  
Author(s):  
J. B. Wiskel ◽  
S. L. Cockcroft
Keyword(s):  
Heat Transfer ◽  
Heat Flow ◽  
Surface Crack ◽  
Crack Formation ◽  
Casting Process ◽  
Direct Chill ◽  
Transfer Model ◽  
Inverse Heat Transfer ◽  
Start Up ◽  
Direct Chill Casting Process

Heat-Transfer Measurements in the Primary Cooling Phase of the Direct-Chill Casting Process

2012 ◽  
Vol 43 (5) ◽  
pp. 1202-1213 ◽  
Author(s):  
Etienne J. F. R. Caron ◽  
Amir R. Baserinia ◽  
Harry Ng ◽  
Mary A. Wells ◽  
David C. Weckman
Keyword(s):  
Heat Transfer ◽  
Casting Process ◽  
Direct Chill ◽  
Direct Chill Casting ◽  
Chill Casting ◽  
Cooling Phase ◽  
Direct Chill Casting Process

Research on causes of hot-tearing of AA3003 aluminum billet during DC casting process

2021 ◽  
Vol 95 ◽  
pp. 29-37
Author(s):  
Bach Dao Hong ◽  
◽  
Trung Trinh Van
Keyword(s):  
Chemical Composition ◽  
Casting Process ◽  
Direct Chill ◽  
Hot Tearing ◽  
Cast Aluminum ◽  
Allowable Limit ◽  
Chemical Composition Distribution ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Direct Chill Casting Process

AA3003 aluminum alloy made from raw scrap materials that have the advantage of economical use, but hottearing often occurs in the product billets of the direct chill casting process. This study used ANOVA analysis method for determination of chemical composition of AA3003 aluminum billet products to show influence of chemical composition on hot-tearing ability. The evaluation of the microstructure and chemical composition distribution of the elements by optical and scanning electron microscopes combined with energy dispersive spectroscopy showed the existence of impurities such as Cu, Zn, Fe, Pb exceeding the allowable limit in aluminum billets, especially at grain boundary, which can be the main reason for the hot-tearing of cast aluminum billets.

Modelling of the Metal/Mould Interactions in the DC Casting Process for Aluminium and Magnesium

2010 ◽  
Vol 654-656 ◽  
pp. 783-786 ◽  
Author(s):  
Arvin Prasad ◽  
Ian F. Bainbridge
Keyword(s):  
Heat Transfer ◽  
Casting Process ◽  
Direct Chill ◽  
Heat Extraction ◽  
Small Scale ◽  
Wall Region ◽  
Wall Heat Transfer ◽  
Mould Wall ◽  
Dc Casting ◽  
Basic Features

The process of direct chill (DC) casting of aluminium and magnesium alloys is regarded as a mature technology. The thrust of more recent work to understand and upgrade the technology has been centred on developing models of the process, the most advanced of which (e.g., Alsim and Calcasoft) have been used to examine what may be considered macro-features of the process (macro-segregation, hot cracking, etc.). These models, being macroscopic, rarely elaborate on the role of mould-wall heat transfer in the DC casting process. As part of the work on DC casting being conducted at CAST, for the investigation of small scale features of the process (e.g. heat extraction through the mould wall), a 2D finite Difference model of the process near the mould-wall region has been developed. The basic features of the model are described and initial results outlined.In particular, the effect of mould-wall heat transfer on the solid shell formed during the steady state regime of DC casting will be presented.

Microstructural and Mechanical Characteristics of Cladding Billets with Different Clad Ratios

2016 ◽  
Vol 877 ◽  
pp. 9-14
Author(s):  
Xing Han ◽  
Jian Zhong Cui
Keyword(s):  
Mechanical Properties ◽  
Mechanical Characteristics ◽  
Casting Process ◽  
Extrusion Process ◽  
Direct Chill ◽  
The Other ◽  
Continuous Casting Process ◽  
Metallurgical Bonding ◽  
Thickness Of Diffusion Layer ◽  
Direct Chill Casting Process

AA4045/AA3003 cladding billets with different clad ratios were fabricated by direct chill casting process. The macrostructures, microstructures, compositions distribution and the mechanical properties near the bonding interface were investigated in detail. The results show that the cladding billet with few defects could be obtained by semi-continuous casting process. The metallurgical bonding was formed due to the diffusions of elements. The decreasing of clad ratio changed the microstructure at the interface and reduced the thickness of diffusion layer. The hardness around the interface is higher than that of AA3003 side but lower than that of the other side, indicating that the interface yield strength is also higher than that of AA3003. After extrusion process, the characteristics of the interface remain that of as-cast cladding billet.

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