Guzik, Edward
Loading...
Email Address
Employee
aktywny
Alternative name
Discipline
inżynieria materiałowa
Author Profiles
Systemy AGH
3 results
Search Results
Now showing 1 - 3 of 3
Item type:Article, Access status: Open Access , The Occurrence of Chunky Graphite in Ductile Cast Iron Solution Strengthened by Silicon(AGH University Press, 2025) Zaczyński, Artur; Królikowski, Maciej; Sokolnicki, Marek; Nowak, Adam; Guzik, Edward; Burbelko, Andriy A.Solution strengthened ferritic cast iron is characterised in EN 1563:2018 (and also in ISO 1083:2018) as grades EN-GJS-450-18, EN-GJS-500-14 and EN-GJS-600-10. Machine and plant builders have been using this material in new designs since 2011. The strength and ductile properties, competitive in comparison with the previous classical ductile cast iron grades, make it pos¬sible to reduce the weight of castings. Particularly preferred is grade EN-GJS-600-10 with Rm min. 600 MPa and A min. 10%. Strengthening of the ferritic matrix is possible due to the content of approximately 4.2% of silicon in the cast iron. In casting practice, this material is difficult to produce in a stable manner due to the frequent occurrence of degenerate chunky graphite in the casting structure, resulting in a loss of ductile properties of the cast iron. In this article, an analysis has been made, based on literature, of the occurrence of strong negative segregation of silicon in classical ductile cast iron. The authors’ own research has confirmed the occurrence of chunky graphite in the cast. Dendritic crystallisation of austenite and strong segregation of silicon favours the formation of chunky graphite. A much stronger proportion of silicon was found in the chunky graphite zone, compared to the adjacent ball graphite zone. The introduction of micro-additives into the liquid melt eliminated the presence of chunky graphite in the casting. The applied modifiers of graphite and metal matrix (hybrid modification) seem to be an effective method to stabilise the technological process of this innovative casting material.Item type:Article, Access status: Open Access , Directions of the development of the metallization of iron alloy products(AGH University of Science and Technology Press, 2021) Szczęsny, Andrzej; Kopyciński, Dariusz; Guzik, EdwardThe article discusses the future of the production of protective coatings based on the hot-dip galvanizing of iron-carbon alloys, such as steel or cast iron. Currently exploited zinc deposits will be exhausted in the next two decades and it will be necessary to start the exploitation of new deposits in order to maintain the supply or quantity of Zn on the global market. In both cases, it will be related to the increasing cost of zinc on world markets. Zinc-based protective coatings (one of the best corrosion protection methods) constitute almost 50% of the world's zinc consumption. Economic issues with the constant increase in the price of Zn will force the change or modification of hot-dip galvanizing technology. The article presents data on the production, consumption and development of zinc prices on the global market. Possible directions are presented which producers of zinc coatings will have to follow in order to maintain sales markets, such as the modification of chemical compositions of protective alloys which could be an alternative to pure zinc coatings and the possibility of limiting zinc consumption based on the influence of the surface of galvanized elements, i.e. its metal matrix, and surface roughness.Item type:Article, Access status: Open Access , The effect of high silicon and molybdenum content on the mechanical properties and microstructure of gray cast iron(AGH University Press, 2022) Dyrlaga, Łukasz; Kopyciński, Dariusz; Guzik, Edward; Soból, Grzegorz; Borak, DariuszThis paper presents an overview of the current knowledge concerning SiMo ductile cast iron begins by describing the standard type of ductile cast iron before proceding to description of its microstructures. The paper then presents its chemical composition and the significant influence of individual elements on technological and mechanical properties. The research section focuses the influence of the addition of Si and Mo to the matrix of gray iron. After casting, stepped samples were carried out on the microstructure along with UTS tensile strength tests. The research presented in the article is a preliminary step towards the goal of obtaining a stable production process for silico-molybdenum cast iron.