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US 6,485,579 B1Granted
Process for preparation of soft magnetic composites and the composites prepared
AssigneeHöganäs AB
InventorsMagdalena Nillius, Patricia Jansson
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Abstract
The invention concerns a process for the preparation of soft magnetic composite products comprising the steps of providing particles of an iron based soft magnetic material with an electrically insulating layer; optionally mixing the dry powder with a lubricant; compacting the powder and heating the obtained component at an elevated temperature in the presence of water vapour. The invention also comprises the iron powder compact subjected to this treatment.
Claims14
A process for the preparation of soft magnetic composites comprising the followings steps:
- a) providing a low carbon powder of a soft magnetic material selected from the group consisting of an atomized or sponge powder of essentially pure iron or an iron-based prealloyed powder containing Si, Ni, Al or Co;
- b) providing the particles of the powder with an electrically insulating layer;
- c) compacting the powder to a composite body;
- and
- d) heating the composite body at a temperature between 400 and 700° C. in the presence of water vapor.
2 more elements
Dependencies are inferred from the claim text.