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THE ASSESSMENT OF CHANGES OF THE STRUCTURE OF DUCTILE CAST IRON DEPENDING ON THE TIME AND TEMPERATURE OF THE METALLURGIC PROCESS


The results of technological tests (chemical composition, solidification curves, microstructure) of ductile cast iron smelting in the Foundry Research Institute in an induction furnace. In the case of crystallization of spheroidal graphite no long...

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The use of low-volume cup samplers for test solidification of cast iron


The aim of this paper was to assess the possibilities and benefits of using low-volume (thinned) samplers for thermal analysis of cast iron. As part of the research, a series of melts of plain cast iron and low-alloy cast iron with different struc...

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Effect of tungsten on the solidification process, microstructure and properties of silumin 226


The effect of tungsten on the solidification process, microstructure and mechanical properties of silumin 226 under the conditions close to equilibrium during pressure die casting was discussed. An increase in both mechanical and plastic propertie...

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Effect of molybdenum on the crystallization, microstructure and properties of silumin 226


The article presents the results of studies of hypoeutectic silumin with a molybdenum addition used for pressure casting. The studies included a thermal-derivative analysis of the crystallization process, a metallographic analysis of the microstru...

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Microstructure of selected 7xxx series aluminum alloys obtained by semi-continuous casting


The study was conducted for two selected 7xxx series aluminum alloys according to PN-EN 573-3:2010 - Polish version. The analysis of ingots was carried out on 7003, 7003S and 7010, 7010K alloys with a similar ratio of zirconium content. Symbols S ...

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Thermal shock resistance of solution-hardened spheroidal cast iron with selected alloy elements


The study involved the preparation of seven melts of spheroidal cast iron solution reinforced by means of an elevated content of silicon, including Cu, Mo and Ni additions. Thermal analyses of the melted cast iron were made and the ...

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Effect of vanadium on the crystallization process, microstructure and properties of Al-Si alloy EN AC-46000


The paper presents the results of the study of Al-Si alloys with a vanadium addition used in pressure casting. The hypoeutectic Al-Si alloy grade EN AC-46000 was applied as the initial alloy. The master alloy AlV10 was introduced into the initial ...

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Alternative technology of obtaining ausferrite in the matrix of spheroidal cast iron


This study presents selected issues regarding the process of obtaining ausferrite from spheroidal cast iron without the application of thermal treatment to the casts. An ausferritic matrix, as well as strong mechanical properties, also ensures hig...

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Effect of chromium on the crystallization process, microstructure and properties of hypoeutectic Al-Si alloy


The paper presents the results of studies of hypoeutectic silumin with a chromium addition used for pressure casting. A silumin with the composition similar to that of EN AC-46000 was used as the initial one. In order to introduce chromi...

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Microstructure formation and grain refinement of Al-Mg-Si-Mn casting alloys


Together with development of casting technology for Al-Si-Mg alloys, new groups of casting materials are undergoes its implementation into foundry practice. Al-Mg-Si casting alloys possessed several advantages such as good strength ...

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