DETERMINATION OF THE PHASES OF NITRIDED-LOW ALLOY, NIOBIUM CONTAINING STEELS (in Russian)
Journal Article
·
· Zavodskaya Lab.
OSTI ID:4103977
As the effect of niobium in steels is due mostly to its distribution between the phases, phase analysis is of great importance. Up to now, however, even the binary systems Nb-C and Nb-N are only slightly known. Therefore phase studies were undertaken on several low-carbon steels. The specimens were electrolytically dissolved in an HCI-tartaric acid solution; for comparison, similar tests were made with a nonaqueous electrolyte of HCl-- methylalcohol. In both cases identical results were obtained by chemical analysis and x ray diffraction of the anodic deposit: the single cubic phase had a lattice constant of 4.428 to 4.435, corresponding to niobium carbonitride. The characteristic hexagonal structure of niobium nitride was not revealed by x ray diffraction. Pure niobium carbide was formed in vacuum treatment. The composition of the phase in lownitrogen steels was about Nb (C,N)/sub 1.0//sub 0/; in high nitrogen (about 0.07%) steels it was close to Nb (C,N)/sup 1.1//sup 0/. (TTT)
- Research Organization:
- I. P. Bardin Central Scientific Research Institute of Ferrous Metallurgy
- NSA Number:
- NSA-15-008765
- OSTI ID:
- 4103977
- Journal Information:
- Zavodskaya Lab., Journal Name: Zavodskaya Lab. Vol. Vol: 26
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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