Iron based powder
AssigneeHöGanäS AB (Publ)
InventorsCaroline Larsson, Ulf Engström, Christophe Szabo
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Abstract
A diffusion-bonded powder having an iron powder having 1-5%, preferably 1.5-4% and most preferably 1.5-3.5% by weight of copper particles diffusion bonded to the surfaces of the iron powder particles. The diffusion bonded powder is suitable for producing components having high sintered density and minimum variation in copper content. The iron powder may be produced by providing an atomized iron powder with an oxygen content of 0.3-1.2% by weight and with a carbon content of 0.1-0.5% by weight, and subjecting the atomized iron powder and a copper containing powder to a reduction annealing process in a reducing atmosphere to obtain the iron based powder.
Claims6
An iron based powder consisting of particles of reduced copper oxide diffusion bonded to the surface of an atomized iron powder,
- wherein the content of copper is 1-5% by weight of the iron based powder,
- wherein the iron based powder is produced by providing an atomized iron powder with an oxygen content of 0.3-1.2% by weight and with a carbon content of 0.1-0.5% by weight, and subjecting the atomized iron powder and a copper containing powder to a reduction annealing process in a reducing atmosphere to obtain the iron based powder, and
- wherein the iron based powder has a maximum particle size of 250 μm, at least 75% is below 150 μm and at most 30% is below 45 μm, wherein the iron based powder has an apparent density of at least 2.70 g/cm3 and an oxygen content of at most 0.16% by weight, and wherein other impurities are at most 1% by weight of the iron based powder.
Dependencies are inferred from the claim text.