Application of the radioisotope process when studying the decarbonization of low-alloy multicomponent steels in sodium
Description
By means of the radioisotope process and the method of a planning matrix for factor experiments quantitative values have been found for the influence of alloys of chromium molybdenum, niobium, vanadium, titanium on the decarbonization of low alloy pearlitic steels in sodium at temperatures of 500 to 8000C. It has been proved that of all alloys with a concentration of 1 to 3% Cr, 1 to 2% Mo, 0 to 1% Nb, 0 to 0.25% V, and 0 to 0.25% Ti, which had been studied, the alloys of iron with 1-3% Cr and 1% Mo showed the greatest tendency for decarbonization in sodium where the carbon concentration decreases from 0.01 to 0.02% at the surface. An increase of the concentration of molybdenum and especially of niobium and titanium leads to a decrease of the decarbonization tendency of steel because the surface concentration of carbon remains at the level of 0.08 to 0.09% in alloys which contain up to 1% niobium and in complex alloy steels with up to 1% niobium, 0.25% vanadium, and 0.25% titanium. (orig.)
Availability note (English)
MF available from INIS under the Report Number; Originally published in: FEI--740, Obninsk 1977, 18 p.Abstract (German)
Durch Anwendung des Radioisotopenverfahrens und der Methode der Planungsmatrix fuer Faktorexperimente ergaben sich quantitative Werte ueber den Legierungseinfluss von Chrom, Molybdaen, Niob, Vanadium und Titan auf die Entkohlung niedriglegierter perlitischer Staehle in Natrium bei Temperaturen von 500-8000C. Es wurde gezeigt, dass von allen untersuchten Legierungen mit der Konzentration 1-3% Cr, 1-2% Mo, 0-1% Nb, 0-0,25% V und 0-0,25% Ti die Eisenlegierungen mit 1-3% Cr und 1% Mo die groesste Neigung zur Entkohlung im Natrium aufweisen, wobei an ihrer Oberflaeche die Kohlenstoffkonzentration auf 0,01-0,02% abnimmt. Eine Erhoehung der Konzentration des Molybdaens und besonders des Niobs und Titans fuehrt zu einer Abnahme der Entkohlungsneigung der Staehle, da in Legierungen, die bis zu 1% Nb enthalten, und in komplex-legierten Staehlen mit bis zu 1% Nb, 0,25% V und 0,25% Ti die Oberflaechenkonzentration des Kohlenstoffs auf dem Niveau 0,08-0,09% bleibt. (orig.)
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Additional details
Additional titles
- Original title (German)
- Anwendung des Radioisotopenverfahrens bei der Untersuchung der Entkohlung von niedriglegierten Mehrkomponenten-Staehlen in Natrium
Publishing Information
- Imprint Pagination
- 16 p.
- Report number
- KFK-tr--681
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 14716763
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- CARBON; CARBON 14; CHROMIUM-MOLYBDENUM STEELS; DECARBURIZATION; DIFFUSION; FACTORIZATION; HIGH TEMPERATURE; MATRICES; NIOBIUM ADDITIONS; QUANTITY RATIO; RADIOMETRIC ANALYSIS; SODIUM; SPATIAL DISTRIBUTION; TITANIUM ADDITIONS; VANADIUM ADDITIONS
- Descriptors DEC
- ALKALI METALS; ALLOYS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CARBON ADDITIONS; CARBON ISOTOPES; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; CHROMIUM ALLOYS; CHROMIUM STEELS; DISTRIBUTION; ELEMENTS; EVEN-EVEN NUCLEI; IRON ALLOYS; IRON BASE ALLOYS; ISOTOPES; LIGHT NUCLEI; METALS; MOLYBDENUM ALLOYS; NONMETALS; NUCLEI; QUANTITATIVE CHEMICAL ANALYSIS; RADIOISOTOPES; STEELS; TRANSITION ELEMENT ALLOYS; YEARS LIVING RADIOISOTOPES
Optional Information
- Notes
- Translated from Russian: Primenenie metoda radioaktivnykh izotopov k issledovaniyu obezuglerozhivaniya mnogokomponentnykh nizkolegirovannykh stalei v natrii.