B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 11/10 (2006.01) B22D 11/111 (2006.01)
Patent
CA 2186447
A powder for covering an ingot mould for the continuous casting of steel, in particular steels with ultra-low carbon content. The powder comprises a base powder and particles of at least one metal nitride, its free carbon content (%C¿free?) being between 0 and 1 % by weight, it being produced by atomization, and having the form of granules of between 20 and 800 µm in diameter. In one application of the invention, the nitride is silicon nitride, and its weight content (%Si¿3?N¿4?) is equal to: %Si¿3?N¿4? = 0.5 - 0.28 x %C¿free? ~ 0.10
L'invention a pour objet une poudre de couverture de lingotière de coulée continue de l'acier, notamment d'acier à ultra-basse teneur en carbone, du type comportant une poudre de base et des particules d'au moins un nitrure métallique, caractérisée en ce que sa teneur en carbone libre (%Clibre) est comprise entre 0 et 1 % en poids, en ce qu'elle est fabriquée par atomisation, et en ce qu'elle se présente sous forme de granules de diamètre compris entre 20 et 800 µm. Selon un exemple de mise en oeuvre de l'invention, ledit nitrure est le nitrure de silicium, et sa teneur en poids (%Si3N4) est égale à: %Si3N4 = 0,5 - 0,28 x %Clibre ~ 0,10.
Coulombet Denis
Damerval Corinne
Debiesme Bernard
Lefebvre Claude
Pontoire Jean-Noel
Denain-Anzin Metallurgie (d.a. Met)
Lesperance & Martineau
Sollac
LandOfFree
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