Abstract
Abstract While analyzing shape accuracy of ferroalloy precision castings in terms of ceramic moulds physical anisotropy, low-alloy steel castings ("cover") and cast iron ("plate") were included. The basic parameters in addition to the product linear shape accuracy are flatness deviations, especially due to the expanded flat surface which is cast plate. For mentioned castings surface micro-geometry analysis was also carried, favoring surface load capacity tp50 for Rmax = 50%. Surface load capacity tp50 obtained for the cast cover was compared with machined product, and casting plate surface was compared with wear part of the conveyor belt. The results were referred to anisotropy of ceramic moulds physical properties, which was evaluated by studying ceramic moulds samples in computer tomography equipment Metrotom 800
Highlights
Influence of ceramic moulds properties on casting quality, especially those creating a set of castings in the ceramic mould, it is considered as a network of relationships between individual elements, which currently does not allow for accurate computer simulation of occurring physical phenomena’s [1]
An example can be difficulties associated with accurate evaluation of metal shrinkage during solidification due to the variable cross-sections and different mould porosity throughout the whole mould volume. In this case it is possible to speak about structural ceramic mould (CM) anisotropy and the anisotropy of the properties associated with the variable CM structure
Evaluation of CM density change based on samples taken from various CM areas
Summary
Influence of ceramic moulds properties on casting quality, especially those creating a set of castings in the ceramic mould, it is considered as a network of relationships between individual elements, which currently does not allow for accurate computer simulation of occurring physical phenomena’s [1]. 2. The evaluation method of ceramic mould significant parameters affecting its anisotropy The main parameters used for ceramic mould performance evaluation are: density and porosity distribution in the whole CM volume. Evaluation of CM density change based on samples taken from various CM areas
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