Tehnički vjesnik, Vol. 17 No. 2, 2010.
Izvorni znanstveni članak
Bimetallic cast iron rolls – Some approaches to assure the exploitation properties
Imre Kiss
Stefan Maksay
Sažetak
The study represents a detailed approach of the influence of some technological factors on durability in exploitation of rolling mill iron rolls and suggests solutions meant to increase the durability of the rolls in exploitation. These researches are trying to give answers to most of the actual problems related to the increase of hardness of rolling mill rolls. These results are of immediate practical utility both for the cast-iron rolling mills roll manufacturing industry and the rolling sectors. In this sense, these research results can be used in the collective framework of the foundries and the rolling mills sectors for quality assurance of rolls as far back as the phase of production to their exploitation, what leads to, inevitably, the quality assurance of produced laminates. Genuine casting technical conditions are analyzed in order to increase the rolls' resistance to wearing, decrease the conversion costs and reduce the waste, decrease the labor costs by lowering the richly alloyed iron with nickel, chromium and molybdenum consumption. Using the new research technique – the numerical simulation – statistical and mathematical data, registered when elaborating the cast iron type FDId2 destined to cast the hard crust of the large-diameter bimetallic rolls, were processed within the present research. The purpose is the optimization of the chemical composition as an influential factor on the rolls hardness, thus, implicitly, on their exploiting qualities. The realization of an optimal chemical composition can constitute a technically efficient mode to assure the exploitation properties, the rolling mills rolls material having an important role in this sense. From this point of view the mathematical modeling is applied, starting from the differentiation on rolls component parts, taking into consideration the industrial data obtained in rolls-foundry, as well as the national standard specifications, which recommend the hardness for different chemical compositions. From this point of view the research is inscribed in the context of scientific capitalization of the process and the industrial technologies optimization, in the way of the analysis and the mathematical experiment.
Ključne riječi
bimetallic rolls; optimal chemical composition; quality assurance
Hrčak ID:
55481
URI
Datum izdavanja:
30.6.2010.
Posjeta: 2.364 *