Sep
17
2007
Técnicas de simulación avanzadas
Simulation of casting solidification using different boundary conditions
J S Suchy *, A Gradowski * and J Lelito*.
* AGH, University of Science and Technology, Department of Modelling of Foundry Process, Poland
67th World Foundry Congress
Correctness and credibility of results of computer simulation of cooling and
solidification process of casting, first of all depends on the appropriate
selection and correct formulation of model’s conditions, among which
initial – boundary conditions are of great importance, because they reflect
kinetics of the heat flow in cast-mould system. Defining geometrical and
physical conditions does not create serious problems. Ho...
Sep
12
2007
Aleaciones ligeras
Advances in the determination of hydrogen concentrations in aluminium alloys
Arndt Froescher* and Andy Moores**
Foseco GmbH, Germany*, Foseco International, UK**
67th World Foundry Congress
A new device for determining hydrogen concentrations in aluminium alloys
has recently been developed. This new device is based on a calcium
zirconate electrochemical sensor and offers the foundryman a quantitative
device that is easy to use and gives accurate and reliable results in a
relatively short space of time.
This paper will detail the experiences from foundry trials and compare the
performance of the new device with other qualita...
Sep
12
2007
Técnicas de simulación avanzadas
Using stress simulation to tackle distortion and cracking in castings
Dr.-Ing. A. Egner-Walter*, S. Olive**
*MAGMA GmbH, Germany, **Maxima Engineering, UK
67th World Foundry Congress
The use of stress simulation in casting design and manufacturer has found
wide spread use in not only the automotive industry but also more general
engineering castings. The development of light-weight body structures in
the automotive industry has lead to a new generation of large thin walled
complex aluminium and magnesium castings with demanding dimensional
and stiffness tolerances, which require particular attention to casting
design...
Sep
12
2007
Aleaciones ligeras
Effectiveness of Zn-Ti based refiner of Al and Zn foundry alloys
W. K. Krajewski*1, A. L. Greer**, J. Zych* and J. Buraś*
* AGH University of Science and Technology, Poland, ** University of Cambride, U.K.
67th World Foundry Congress
The presented work is devoted to structural characteristics and performance
of the new family of grain-refiners, based on the Zn-Ti system. The
system studied was Zn-25wt%Al alloy (ZnAl25), Al-20wt%Zn alloy
(AlZn20), Zn-4.6wt%Ti master alloy (ZnTi4 MA), ZnAl-4 wt%Ti (ZnAl-Ti4
MA) as well as the traditional refiners Al-5wt%Ti-1wt%B (AlTi5B1 MA) and
Al-3wt%Ti-0.15wt%C (AlTi3C0.15 MA). SEM (scanning electron microscopy),
LM (light microscop...
Sep
09
2007
Acabados e inspección
Development of a 10w alloy cast steel for automobile blanking, drawing, and trimming die
J. S. Shin, C. B. Song, B. H. Kim, S. M. Lee, and B. M. Moon
Korea Institute of Industrial Technology, Incheon, Korea
67th World Foundry Congress
The optimization of chemical composition with appropriate heat treatments
was tried to develop a significantly reduced Mo, V, and Cr containing low
alloy cast steel for automobile blanking, drawing, and trimming dies,
possessing shorter production time and lower manufacturing cost as well
as maintaining working performances compared to the traditional die
materials. The effects of Si content on combinations of important
properties such a...
