Experience of the determination of carbon, sulfur, oxygen and nitrogen in alloys based on niobium on the gas-analyzers of the LECO firm

Alekseev A.V., Rastegayeva G.Yu., Pahomkina T.N.
UDC
543.51; 669.1
DOI
10.18577/2307-6046-2018-0-1-3-3
Article PDF (Russian) (550.33 KB)
How to cite
Alekseev A.V., Rastegayeva G.Yu., Pahomkina T.N. Experience of the determination of carbon, sulfur, oxygen and nitrogen in alloys based on niobium on the gas-analyzers of the LECO firm // Proceedings of VIAM. 2018. No. 1. DOI: 10.18577/2307-6046-2018-0-1-3-3. URL: https://test.viam.ru/en/journal/2018/1/3
Keywords
alloys based on Nb, determination of carbon, determination of sulfur, determination of oxygen, determination of nitrogen, method of infrared absorption spectroscopy, melting method in a current of an inert carrier gas.
Abstract

A study was made of the possibility of determining the mass fraction of carbon and sulfur in an alloy based on Nb by burning in an induction furnace a gas analyzer CS-444 from Leco, followed by detection in an infrared cell of a spectrometer. A catalyst is selected, with a specially selected composition, which allows full recovery of carbon and sulfur from the analyzed material. Determination of the content of the oxygen and nitrogen mass fraction in the Nb-based alloy was carried out by reductive melting in a stream of an inert carrier gas, followed by detection of oxygen in an infrared cell and nitrogen in a conductometric cell of a TC-600 from Leco gas analyzer. The catalysts required for the complete extraction of these elements from an Nb-based alloy were selected

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