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US 4,544,463 AGranted
Method for producing equiaxed iron or iron alloy particles
AssigneeOlin Corporation
InventorMichael J. Pryor
Life of this patent
Estimating the term…
Abstract
A method is disclosed for producing iron or iron alloy particles. A metal or metal alloy strip having fine particles of iron or alloy distributed throughout is provided. The metal strip is selectively dissolved without substantial dissolving of the iron or iron alloy particles in order to recover the particles.
Claims14
A method of producing substantially equiaxed iron or iron alloy particles, comprising the steps of:
- providing a melt including a base metal consisting essentially of copper, transition metal additions of less than about 10% by weight to enhance magnetic performance, and above about 20% by weight of iron;
- rapidly solidifying said melt into a copper or copper alloy strip having distributed therein fine, substantially equiaxed particles of iron or iron alloy;
- and
- selectively dissolving said copper or copper alloy without substantial dissolving of said iron or iron alloy particles to recover said substantially equiaxed particles, said step of dissolving including immersing said copper or copper alloy strip in an electrolytic solution selected from the group consisting of alkaline metal sulfates so that the iron or iron alloy particles are passivated while permitting electrolytic dissolution of the copper or copper alloy strip.
1 more element
Dependencies are inferred from the claim text.