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  • Author: S. Krajewski x
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P.K. Krajewski, J.S. Suchy, G. Piwowarski and W.K. Krajewski

Abstract

The paper presents results of measuring thermal conductivity and heat capacity of bentonite foundry sand in temperature range ambient - 900­­°C. During the experiments a technical purity Cu plate was cast into the green-sand moulds. Basing on measurements of the mould temperature field during the solidification of the casting, the temperature relationships of the measured properties were evaluated. It was confirmed that water vaporization strongly influences thermal conductivity of the moulding sand in the first period of the mould heating by the poured casting.

Open access

S. Krajewski and J. Nowacki

ABSTRACT

This paper presents the results of cutting aluminum foams. The experiment includes the following mechanical methods of cutting: circular saw cutting, band-saw cutting, EDM cutting, water-jet cutting, and thermal cutting methods: laser cutting and air plasma cutting. The influence of the cutting method on the edge geometry was specified in the paper. EDM was defined as the most advantageous method of Al foam cutting, as providing the best aluminium foam edges surface quality for welding.