Nitride inclusions in titanium-containing high-nitrogen steel after solid-phase nitriding

Autor:	I. V. Dorofievich, A. Ya. Stomakhin, E. V. Butskii, M. V. Kadach, E. V. Lysenkova
Rok vydání:	2015
Předmět:	Materials science Scanning electron microscope Metallurgy Metals and Alloys chemistry.chemical_element Thermal treatment Nitride Nitrogen Titanium nitride chemistry.chemical_compound chemistry Impurity Nitriding Titanium
Zdroj:	Russian Metallurgy (Metally). 2015:689-692
ISSN:	1555-6255 0036-0295
DOI:	10.1134/s0036029515090098
Popis:	The principal possibility of production of sheet titanium-containing high-nitrogen steels without extreme harmful coarse nitride inclusions and their aggregates, which are characteristic of these compositions even at a relatively low (impurity) nitrogen content, is studied. To this end, the nitrogen content in the initial metal before its solidification is limited to the calculation level at which titanium nitrides are thermally unstable. Nitrogen is introduced in metal (08Cr18Ni12Ti steel) during its chemical thermal treatment in a nitrogen atmosphere at 1200°C. The nitrogen content in the finished metal is 0.4% (at 0.31% Ti). Studies in this direction are thought to be promising, since it is evident that the production of a metal of such a composition using the standard method of nitrogen introduction (in melt) is impossible. Scanning electron microscopy shows that titanium nitride particles in the finished metal are ≤0.5 μm in size.
Databáze:	OpenAIRE
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