Jul
23
2007
Melting methods and materials
Energy saving potential of melting in medium-frequency coreless induction furnaces
F Donsbach and D Trauzeddel
Otto Junker GmbH, Simmerath, GERMANY.
67th World Foundry Congress
The available energy saving approaches in induction melting operations are
twofold:
• Reduction of the furnace system\'s electrical losses through improved
design
• Use of optimized operating and control regimes
The first part of this paper describes in quantitative terms, based on a
review of investigations and test results, how the surplus consumption of
power can be reduced markedly through proper feeds...
Jul
21
2007
Management and marketing
Foundry Management by Internet
T D Law
AFSoftware Limited
67th World Foundry Congress
This paper argues that computer software, including programs designed
specifically for foundries, has grown up over the past few years. It is now
quite straightforward to supply and support foundry management software,
at a distance – even when the distances involved are world-spanning.
This is true of course, only if the software supplied is a true package
which is easily supportable, in the way that an accounting package is a
t...
Jul
18
2007
Metal matrix composites
Effect of volume fraction and particle size of reinforcement on thermal analysis and heat transfer parameters of gravity die cast hypereutectic Al-22%
Subramanya. P. K, Sathyapal Hegde and K. Narayan Prabhu
Department of Metallurgical & Materials Engineering National Institute of Technology Karnataka,India
67th World Foundry Congress
The properties of cast metal matrix composites are largely dependent on
the solidification behaviour which is dictated by the thermophysical
properties of the melt, mould and the interfacial heat transfer from the
metal to the mould. In the present investigation the thermal analysis
parameters and heat transfer aspects of hypereutectic aluminium alloy
matrix composites were studied. As the vol% of SiCp increases the total
solidification ...
Jul
18
2007
Engineering
Stream-lined Gating Systems with Improved Yield - Dimensioning and Experimental Validation
N Tiedje*, S Skov-Hansen*
Department of Manufacturing Engineering and Management, Technical University of Denmark
67th World Foundry Congress
The paper describes how a stream-lined gating system where the melt is confined and
controlled during filling can be designed.
Commercial numerical modelling software has been used to compare the stream-lined
design with a traditional gating system. These results are confirmed by experiments where
the two types of lay-outs are cast in production.
It is shown that flow in the stream-lined lay-out is well controlled and that the quality of ...
Jul
18
2007
Light alloys
The use of tilt filling to improve the quality and reliability of castings
R.A. Harding
IRC in Materials Processing, The University of Birmingham, UK.
67th World Foundry Congress
There is currently an interest in using quiescent mould filling to overcome
problems inherent in the casting of Ti alloys, particularly bubble
entrainment during the rapid mould filling necessitated by limited
superheat. As a first step, the Durville tilt casting process has been reevaluated
for casting Al alloys in sand and ceramic shell moulds and has
enhanced the understanding of the process parameters. Computer
simulations of surface...
