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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hinduja, Srichand
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2021A Review on Microcellular Injection Mouldingcitations
- 2010Image processing methods for online measurement in radial-axial ring rolling
- 2009Investigating the feasibility of DLC-coated twist drills in deep-hole drillingcitations
- 2006Effect of MQL on the tool life of small twist drills in deep-hole drillingcitations
- 2006Boundary element stress analysis for bi-metallic dies in pressure diecastingcitations
- 2006Boundary element stress analysis for copper-based dies in pressure die castingcitations
- 2006Bi-metallic dies for rapid die castingcitations
- 2006Experimental investigation into the thermal behavior of copper-alloyed dies in pressure die castingcitations
- 2006The performance of small diameter twist drills in deep-hole drillingcitations
- 2002Optimization for boiling heat transfer determination and enhancement in pressure die castingcitations
- 2001Novel cooling channel shapes in pressure die castingcitations
- 2000An experimental and numerical investigation into the thermal behavior of the pressure die casting processcitations
- 2000Determination of heat transfer coefficients using a 1-d flow model applied to irregular shaped cooling channels in pressure diecastingcitations
- 2000Predicting heat extraction due to boiling in the cooling channels during the pressure die casting processcitations
Places of action
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article
Bi-metallic dies for rapid die casting
Abstract
Almost all casting processes involve placing the melt in a mould of lower thermal conductivity. As a result, high rates of energy extraction are effectively prevented. The reasons for this are all too apparent with materials of high thermal conductivity not having the necessary mechanical and thermal properties to withstand the rigours of the casting process. Moreover, slower solidification rates allow for minimal control and relatively simple design processes. The challenge is to design dies that allow for phenomenally higher rates of heat transfer. Dies are usually manufactured from hardened steel and incorporate cooling channels in order to increase the rate of energy extraction. Dies could plausibly be made from copper, which has a thermal conductivity some 16 times greater than conventional steels. However, copper cannot withstand the rigours of the casting process and in particular the abrasive action of the liquid melt albeit zinc or aluminium. This paper is concerned with the establishment of thermal models for copper-alloyed dies suitably protected with a thermally sprayed steel layer. Both steady state and transient thermal models are developed that are capable of predicting the time averaged and transient cyclic thermal behaviour of the new die designs. The models are based on the boundary element method. A perturbation approach is adopted for the prediction of transient die temperatures. Numerical experiments are performed and predicted temperatures are compared with thermocouple readings obtained from a copper-steel die on a commercial die casting machine. © 2005 Elsevier B.V. All rights reserved.