OXIDATION RESISTANCE CR-AL STEELS AND CALCULATION OF PARAMETRIC DIAGRAMS

Authors

DOI:

https://doi.org/10.20535/2305-9001.2014.70.33144

Keywords:

heat resistance, Cr-Al steel, parameter diagram, operating properties, kinetics of oxidation, term of exploitation

Abstract

In work there are the considered questions of oxidation resistance steels at different temperatures with a different maintenance of chrome and aluminums. Conformity to the law of oxidization of heat-resistant is explored steels in different gases environment. It is set that the heated air is more aggressive environment with the additive 45% of aquatic steam. The increase maintenance of chrome from 18 to 30% results in diminishment of losses of mass from 15 to 5 мг/см2. addition of aluminums to chromic steels also brings to the increase of oxidation resistance studied over steels. Thus, maybe, that became containing of more than a 25% chrome with the addition 2…3% of aluminums has perspective development. For the decline of Saving  energy costs  and time as mathematical treatment construction of the developed models diagrams was used. The developed method allows to determine different optimum chemical compositions of heat-resistant Cr-Al steels depending on temperature terms and duration of exploitation of the poured details. The developed models allow to determine oxidation resistance and terms of exploitation of Cr-Al steels. The developed models allow with high authenticity to forecast oxidation resistance steels with different concentrations of chrome and aluminums

Author Biographies

Михайло Михайлович Ямшинський, Национальный технический университет Украины "КПИ"

Кафедра литейного производства черных и цветных металлов

Костянтин Сергійович Радченко, НТУУ КПІ

Departament of foundry of ferrous and nonferrous metals

References

Fedorov G.E. Tehnologicheskie svojstva litejnyh zharostojkih hromoaljuminievyh stalej. Dissertacija na soiskanie uchenoj stepeni kandidata tehnicheskih nauk. – Kyiv: Kyiv Politechnic Institute, 1977, 208 p.

Ljutyj V.A., Platonov E.A., Fedorov G.E, Kuz'menko A.E. Journal of Litejnoe proizvodstvo, 2001, no 4, pp. 13…15.

Fedorov G.E., Yamshinskiy M.M., Veres I.A., Ezzhev V.V., Nazarenko V.S. Journal of Lit'e Ukrainy, 2010, no 1, pp. 31…35.

Vashhenko K.I., Zhuk V.Ja., Ljutyj V.A. Journal of Litejnoe proizvodstvo, 1970, no 4, pp. 28…32.

Yamshinskiy M.M. Journal of Metaloznavstvo ta obrobka metalіv, 2003, no 1, pp. 42...43.

Nikitin V.N. Raschet zharostojkosti metallov (Calculation of heat-resistant of metals) Moscow: Metallurgija, 1976, 208 p.

Francevich I.N., Vojtovich R.F., Lavrenenko V.A. Vysokotemperaturnoe okislenie metallov i splavov (High temperature oxidization of metals and alloys) Kyiv: Gostehizdat, 1963, 102 p.

Kornilov I.I. Zheleznye splavy. (Ferrous alloy) T.1. Moscow: Izd-vo AN SSSR, 1945, 192 p.

Published

2014-11-10

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