Steel article
OwnerOdd Sandberg, Lennart Jonsoninventors
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Abstract
The invention concerns an article of a steel which is characterized in that it consists of an alloy which contains in weight-%: 1.2-2.0 C, 0.1-1.5 Si, 0.1-2.0 Mn, max. 0.2 N, max. 0.25 S, 4-8 Cr, 0.5-3.5 (Mo+W/2), 5-8 V, max. 1.0 Nb, balance essentially only iron and unavoidable impurities, and that the steel has a micro-structure obtainable by a manufacturing of the steel which comprises spray forming of an ingot, the micro-structure of which contains 8-15 vol-% carbides of essentially only MC-type where M substantially consists of vanadium, of which carbides at least 80 vol-% have a substantially rounded shape and a size in the longest extension of the carbides amounting to 1-20 μm.
Claims27
Steel article, characterized in that it consists of an alloy which contains in weight-%;
- 1.2-2.0 C
- 0.1-1.5 Si
- 0.1-2.0 Mn
- max 0.2 N
- max 0.25 S
- 4-8 Cr
- 0.5-3.5 (Mo+W/2)
- 5-8 v
- balance essentially only iron and unavoidable impurities, and that the steel has a micro-structure obtainable by a manufacturing of the steel which comprises spray forming of an ingot, the micro-structure of which contains 8-15 vol-% carbides of essentially only MC-type where M substantially consists of vanadium, of which carbides at least 80 vol-% have a substantially rounded shape and a size in the longest extension of the carbides amounting to 1-20 μm.
Article according to any of claims 1-20, characterized in that that steel does not contain more than max. 0.04 Nb.
Dependencies are inferred from the claim text.