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2 Archives of Foundry Engineering

2 2014

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Supporting the Bronze CastingThrough Information Structuring Based on Ontology application

Górny Z., Wilk-Kołodziejczyk D., Smolarek-Grzyb A.

Archives of Foundry Engineering

2014

Vol. 14, iss. 1

33--36

A significant part of the knowledge used in the production processes is represented with natural language. Yet, the use of that knowledge in computer-assisted decision-making requires the application of appropriate formal and development tools. An interesting possibility is created by the use of an ontology that is understandable both for humans and for the computer. This paper presents a proposal for structuring the information about the foundry processes, based on the definition of ontology adapted to the physical structure of the ongoing technological operations that make up the process of producing castings.

Effect of Microstructure on Mechanical Properties of BA1055 Bronze Castings

Łabanowski J., Olkowski T.

Archives of Foundry Engineering

2014

Vol. 14, iss. 2

73--78

The article presents research results performed on aluminum bronze CuAl10Fe5Ni5 (BA1055) castings used for marine propellers. Metallographic studies were made on light microscope and a scanning electron microscope to assess quantitatively and qualitatively the alloy microstructure. It has been shown that the shape, size and distribution of the iron-rich κ−phase precipitates in bronze microstructure significantly affect its mechanical properties. With an increase in the number of small κ−phase precipitates increases the tensile strength of castings, while the presence of large globular precipitates improves ductility. Fragmentation and shape of κ−phase precipitates depends on many factors, particularly on the chemical composition of the alloy, Fe/Ni ratio, cooling rate and casting technology.