Sep
04
2007
Light alloys
The Prefil® technique for molten metal cleanliness measurement
J Pickering *, P Enright *
* N-Tec Ltd, UK
67th World Foundry Congress
This paper discusses the use of the Prefil pressure filtration technique for
the on-line monitoring of molten metal quality. Over the past 10 years
Prefil has become established as one of the main metal quality monitoring
tools in aluminium. An introduction to the basic technique is followed by a
detailed explanation of the results, and their interpretation with reference
to specific case studies.
The real power of Prefil is realized whe...
Sep
04
2007
Light alloys
Fabrication of silicon ingot by CCCC method
B. M. Moon, D. S. Lee, B. H. Kim, J. S. Shin, and S. M. Lee
Korea Institute of Industrial Technology, Incheon, Korea
67th World Foundry Congress
In the fabrication process of multi-crystalline Si ingot for solar cell wafer,
CCCC (Cold Crucible Continuous Casting) technology was practiced to
prevent contamination from crucible wall as well as to overcome the
problems of low solidification rate and crucible consumption. The effects of
Joule heating and electromagnetic pressure in molten Si were
systematically investigated with various processing parameters such as
crucible configur...
Jul
30
2007
Advanced simulation techniques
Simulation of solute redistribution during casting and solutionizing of multi-phase, multi-component aluminum alloys
F. Yi,* H. D. Brody* and J. E. Morral**
* University of Connecticut, USA, ** The Ohio State University, USA
67th World Foundry Congress
Numerical simulations of solute redistribution and microstructure evolution
during solidification, post-solidification cooling, and solution heat treatment
have been extended to multi-phase, multi-component Al-Si-Cu-Mg alloys.
The basic models that have been applied to binary and ternary systems
have been modified to handle the extra degrees of freedom in quaternary
and higher order systems, which are more representative of commercial
ca...
Jul
30
2007
Advanced simulation techniques
Empirical model for tensile property prediction in cast and heat treated Al-Si-Cu-Mg alloys
J. Fang*, H. D. Brody* and J. E. Morral**
* University of Connecticut, USA, ** The Ohio State University, USA
67th World Foundry Congress
An empirical relation has been developed for Al-Si-Cu-Mg alloys to
facilitate the computer aided design of casting and heat treatment
processes that can be used to achieve specified tensile properties in
critical locations of cast components. The empirical relation is one
element of a collaborative program to develop, verify and market an
integrated system of software, databases, and design rules to enable
quantitative prediction and opt...
Jul
30
2007
Moulding methods and materials
Green manufacturing for magnesium alloys
Shae K. Kim, Jin-Kyu Lee, Young-Ok Yoon and Hyung-Ho Jo
Korea Institute of Industrial Technology, Korea.
67th World Foundry Congress
Mg alloys present a number of interesting properties, such as low density,
high specific strength and good castability, etc. Despite these properties,
Mg alloys are used with many precautions of high chemical reactivity,
especially during melting and casting procedures. Research has been
directed to solve the problem by replacing commonly used protection gas
SF6, which is very effective in protection but has high global warming
potential...
