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- Title
Influence of Nitrogen on Chromium Cast Iron Structure and Properties.
- Authors
Ovcharenko, P. G.; Nikonova, R. M.; Tereshkina, S. A.; Lubnin, A. N.
- Abstract
Structural and phase compositions of castings of chromium cast irons ChKh32 (2–4% C; 30% Cr; 2.4% Mn; 0.6% Si) alloyed with nitrogen using nitrided chromium as a master alloy are studied by X-ray diffraction, metallographic analyses, and scanning electron microscopy methods. It is shown that nitrogen in cast iron obtained is present mainly in iron-based solid solution, along with chromium, manganese and carbon, and is partly included within the composition of carbide phase (Fe, Cr)7C3. Nitrogen alloying of ChKh32 (2% C) stabilizes austenite. Nitrogen alloying of ChKh32 (3–4% C) followed by heat treatment leads to formation of an austenitic-martensitic structure with an increase in material hard-ness. It is shown that addition of nitrogen in an amount of 0.2% to ChKh32 (2% C) improves corrosion resistance, and an increase in carbon content in these materials increases abrasive wear resistance.
- Subjects
IRON founding; IRON alloys; CHROMIUM; CAST-iron; CHROMIUM alloys; FRETTING corrosion; NITROGEN; WEAR resistance
- Publication
Metallurgist, 2023, Vol 67, Issue 3/4, p452
- ISSN
0026-0894
- Publication type
Article
- DOI
10.1007/s11015-023-01531-2