Metallurgy and Foundry Engineering
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ISSN 1230-2325
e-ISSN: 2300-8377
Issue Date
2010
Volume
Vol. 36
Number
No. 2
Description
Journal Volume
Metallurgy and Foundry Engineering
Vol. 36 (2010)
Projects
Pages
Articles
The forging process of aircraft engines turbine blades
(2010) Sińczak, Jan; Łukaszek-Sołek, Aneta; Bednarek, Sylwia; Chyła, Paweł
The aim of this paper was to obtain information about optimum conditions of the forging process of a blade made from high-temperature creep resisting alloy called Inconel 718. A three-dimensional rigid-plastic finite element method (FEM) of forging process of high-pressure compressor rotor's blade analysis has been performed. Various forging process variants were analysed, including isothermal conditions.
Influence of closed-die hot compaction parameters on selected properties of PM Al-Si-Fe-Cu materials
(2010) Wojtaszek, Marek; Dudek, Piotr
The work presents the results of investigations of the materials obtained by closed-die hot compaction of A117Si5Fe3Cu1.1Mg0.6Zr alloy powder. The influence of temperature and punch unit pressure on the shape of samples, as well as on relative density, selected mechanical properties and microstructure of obtained products, was estimated. The beneficial parameters of hot compaction were determined.
The influence of iron powder and disintegrated steel scrap additives on the solidification of cast iron
(2010) Kopyciński, Dariusz; Dorula, Józef
The study proves that by introducing the iron powder and disintegrated steel scrap to low-sulphur cast iron still before the inoculation carried out with a conventional graphitising inoculant, the mechanical properties similar to those obtained during the inoculation treatment carried out on cast iron with the recommended high sulphur content are achieved. The said operation increases the number of crystallisation nuclei for dendrites of the primary austenite. In this case, the iron particles act as substrates for the nucleation of primary austenite gp due to a similar crystallographic behaviour of the regular face centered cubic lattice The more numerous are the dendrites of primary austenite, the less free space is available in the interdendritic spaces for the formation of graphite eutectic grains, which makes the structure more refined (more eutectic grains) and the mechanical properties higher.
Optimization of casting technology of the pressure die cast AZ91D Mg-based alloy
(2010) Piwowarski, Grzegorz; Krajewski, Witold; Lelito, Janusz
Pressure die casting has become the next area of experimentation on virtual models in computer memory. The article presents an attempt to optimize the manufacturing process of an item made of magnesium AZ91D alloy, which was cast using the pressure technology on a machine with a hot pressing chamber. Special attention was paid to the flow velocity in individual parts of the gating system and in the mould cavity, as well as to the air evacuation from the mould cavity. The aim was to achieve a flawless casting, especially in terms of porosity.
Extended free surface flow model based on the lattice Boltzmann approach
(2010) Szucki, Michał; Suchy, Józef Szczepan; Żak, Paweł; Lelito, Janusz; Gracz, Beata
The aim of this work was to extend numerical model of mould filling phenomena previously presented in [3]. Authors described some techniques for modeling single phase and free surface flows. Method, called 'piston model', for modeling influence of liquid flow on gas behavior inside the mould and also, effect of local gas pressure on movement of metal free surface, was shown. In last part of this work, results from presented model were compared with data from the commercial simulation environment FLOW-3D.