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EffEct of hEAt trEAtmEnt pArAmEtErs on thE formAtIon of ADI mIcrostructurE wIth ADDItIons of ni, cu, mo WpłyW parametróW obróbki cieplnej na kształtoWanie mikrostruktury żeliWa aDi z DoDatkami ni, cu, moMetallographic examinations and mechanical tests were carried out on the ductile iron with additions of Ni, Cu and Mo in as-cast state and after austempering. TTT and CCT diagrams were plotted. The heat treatment was performed in six different variants. Studies included qualitative assessment of the microstructure and testing of mechanical properties such as R0,2, Rm, A, Z, HRC, KC. An analysis of the obtained results was also presented.Keywords: ductile iron, heat treatment, the microstructure of ADI, ADI mechanical properties przeprowadzono badania metaloznawcze żeliwa sferoidalnego z dodatkami ni, cu i Mo w stanie lanym i po hartowaniu izotermicznym. opracowano wykresy cTpi i cTpc. obróbkę cieplną wykonano w sześciu różnych wariantach. Badania metaloznawcze obejmowały ocenę jakościową mikrostruktury i pomiary właściwości mechanicznych: r0,2, Rm, A, Z, HRC, Kc. dokonano analizy uzyskanych wyników

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The subject of the study is the improvement of the quality of moulding sand preparation. An exploration research performed on the data concerning moulding sand quality parameters was described. The aim of the research was to find relationships between various factors determining the properties of moulding sands and, based on the results obtained, build models predicting the sand moisture content with the induction of classification and regression trees. A two-match prediction approach was demonstrated and its effectiveness in evaluating the moulding sand moisture content was discussed. The knowledge in the form of rules acquired in this way can be used in the creation of knowledge bases for systems supporting decisions in the diagnostics of the moulding sand rebonding process. Formalized knowledge also facilitates further processing of the measurement data.