Wyniki wyszukiwania - BazTech

Ograniczanie wyników

3 Archives of Foundry Engineering

3 2007

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: innovative materials and foundry technologies

Sortuj według:

Ogranicz wyniki do:

The investigate of flow in direct extrusion process of heterogeneous materials flow

Patejuk A., Piwnik J., Gabrylewska M.

Archives of Foundry Engineering

2007

Vol. 7, iss. 2

157-162

The results of experimental investigations were introduced in range of verification of model investigations results (in utilization of supplementary materials) with results of investigations on real materials are presented in this work. To this aim the matrix became constructed with interchangeable little eye made possible extrusion process of real materials at three reduction ratio: [lambda] = 1,5 1,75 and 2,0. Analysis of heterogeneous materials flow process shows, that of principle onto extrusion process exerts kind as well as a way distribution of entrance creators' materials batch. However size of strength of stamp pressure is determined by reduction ratio in main measure.

Modelling of semi-liquid aluminium flow in extrusion

Skorulski G., Piwnik J.

Archives of Foundry Engineering

2007

Vol. 7, iss. 2

31-36

Experimental modeling using substitute materials is usually a simply way to obtain satisfacted results. This kind of experiment is characterizing by low cost. The significant results may be quickly applying using theory of probability. The way of modelling the deformation mechanisms during extrusion of aluminium alloys in semi - liquid phase, the way of preparing samples and experimental technique has been analysed in the following work. On the ground of received results (i.e. registrations of consecutive process steps) the grid of the flow velocity vectors on a flat sample surface was done. It allowed to draw conclusions which one of the basic deformation mechanisms is dominant in particular stage of the process. The technique of measurement has been shown as well. Experiments are made using plasticine and rape oil as a substiute materials. Some kind of different variants have been investigated. To ensure that such model experiments provide useful information it is essential to select model materials and prepare samples that would exhibit (preferably at room temperature) similar behaviour and similar deformation mechanisms as those present during the actual deformation process of aluminium alloys in a semi-liquid state. In particular the FLS, SS and PDS mechanisms should be adequately reproduced.

Influence of loading on wear of composite material FeAl-Al2O3

Patejuk A.

Archives of Foundry Engineering

2007

Vol. 7, iss. 2

15-18

In the paper, the authors showed the results of studies on influence of production conditions on composite material properties during intermetalic phase Fe-Al reinforced by Al2O3 particles. It was assessed that the quantity, size and condition of the surface of applied reinforcement has a significant influence on properties of composite material. Improvement of tribologic properties and resistance to erosion wear of the material was noted together with decrease in size of the particles used as reinforcement of the composite material. The use of Al2O3 particles covered with nickel layer as reinforcement substantially improved properties of studied composite material.