Livarski vestnik 59/2012 Nr. 4
Adel Nofal
Central Metallurgical R&D Institute (CMRDI)
P.O. Box 87 Helwan, Cairo, Egypt
E-mail: adelnofal@hotmail.com
ADVANCES IN THE METALLURGY AND APPLICATIONS OF ADI
Marek Kovac*, Vladimir Krutis*, Pavel Machovcak**, Marketa Tkadleckova***
* Mecas ESI s.r.o.
** VÍTKOVICE HEAVY MACHINERY a.s.
*** TU Ostrava
NUMERICAL SIMULATION OF STEEL INGOTS
Emir SUBAŠIĆ, Dipl.-Ing.
Todor IVANOV, Dipl.-Ing.
Andreas BÜHRIG-POLACZEK, Prof. Dr.-Ing.
Company and company address:
Gießerei-Institut der RWTH Aachen, Intzestr. 5, 52072 Aachen, Germany
NUMERICAL SIMULATION OF THE WAX INJEXTION PROCESS
Adel Nofal
Central Metallurgical R&D Institute (CMRDI)
P.O. Box 87 Helwan, Cairo, Egypt
E-mail: adelnofal@hotmail.com
This review analyses the key features of those novel processing techniques and the resulted new applications of ADI. The survey firstly discusses the possible strengthening mechanism of ADI with special emphasis on the TRIP phenomena, associated with the deformation of ADI. Strength and toughness properties could be improved through the development of:
- Ausformed ADI; where mechanical processing component was added to the conventional heat treatment as a driving force to accelerate the rate of stage I austempering.
- Squeeze cast ADI; where superior quality ADI castings were produced through squeeze casting of molten iron in a permanent mould, followed by in-situ heat treatment of the hot knocked-out castings in the austenite range followed by normal austempering in a salt bath.
- Two step austempering to achieve finer ausferrite at higher undercooling during austempering treatment followed by austempering at higher temperature where higher austenitic carbon is promoted.
The abrasion resistance could be remarkably increased through the development of:
- Carbidic ADI-ductile iron containing carbides subsequently austempered to form ausferritic matrix with an engineered amount of carbides
- Bainitic/martensitic (B/M) ADI containing less expensive alloying elements such as Si and Mn in the range of 2.5 - 3.0 %
Marek Kovac*, Vladimir Krutis*, Pavel Machovcak**, Marketa Tkadleckova***
* Mecas ESI s.r.o.
** VÍTKOVICE HEAVY MACHINERY a.s.
*** TU Ostrava
Key words: ingot, metal die, numerical simulation, defects, porosity, optimizationa
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Emir SUBAŠIĆ, Dipl.-Ing.
Todor IVANOV, Dipl.-Ing.
Andreas BÜHRIG-POLACZEK, Prof. Dr.-Ing.
Company and company address:
Gießerei-Institut der RWTH Aachen, Intzestr. 5, 52072 Aachen, Germany
NUMERICAL SIMULATION OF THE WAX INJEXTION PROCESS
In this work, the wax injection process of an intake manifold pattern was modelled and simulated. Non-Newtonian behaviour of the unfilled wax was taken into account, as well as the real process conditions (injection pressure in pressure inlet and pasty state temperature as initial temperature). Obtained results are presented in form of movies showing temperature distribution in the wax during wax injection. A comparison with the experimental results is given, too.
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