The method of impurities concentration by decrement moving rate of directed melt solidification in high gradient conditions

Min P.G., Sidorov V.V., Vadeev V.E., Bondarenko Yu.A.
UDC
669018.44:669.245
DOI
10.18577/2307-6046-2017-0-8-3-3
Article PDF (Russian) (747.3 KB)
How to cite
Min P.G., Sidorov V.V., Vadeev V.E., Bondarenko Yu.A. The method of impurities concentration by decrement moving rate of directed melt solidification in high gradient conditions // Proceedings of VIAM. 2017. No. 8. DOI: 10.18577/2307-6046-2017-0-8-3-3. URL: https://test.viam.ru/en/journal/2017/8/3
Keywords
silicon, phosphorus, sulfur, superalloy, impurities, nonmetallic inclusions, crystallization, method of impurities concentration, metallographic research.
Abstract

The efficiency method for concentration of nonmetallic inclusions with sulfur, phosphorus and silicon from melt of nickel-based superalloys in high gradient conditions and reduced rate of moving the crystallization front (V=6 mm/h). Experimentally established that using of this method allows to concentrate a main part of nonmetallic inclusions with sulfur, phosphorus and silicon in casting top limited volume. It makes enable detection of inclusions, chemical composition research, morphology and location in structure of alloy. In this case occurs reducing of impurities content in bottom part of casting.

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