Method for treating at least one part of soft magnetic material to form a hard wear area
AssigneeRobert Bosch GmbH
InventorsDieter Liedtke, Juergen Graner, Norbert Keim, Joerg Illing
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Abstract
A method for treating soft magnetic parts by annealing and producing a wear guard layer, in which the soft magnetic parts are either successively annealed and provided with a wear guard layer in a reaction chamber of a treatment apparatus, or the annealing and production of a wear guard layer are done simultaneously in the reaction chamber. This avoids intermediate transportation and temporary storage as well as contamination of the parts and reduces the costs of the method. The method is especially suitable for treating soft magnetic parts of electromagnetic fuel injection valves.
Claims20
A method for treating at least one part of a soft magnetic material by annealing and production of a wear guard layer in a sealable reaction chamber, which comprises, placing the at least one part (1, 16, 34, 48) in said sealable reaction chamber (61), annealing and producing a wear guard layer (84) on the at least one part in the reaction chamber (61) under retention of the soft magnetic characteristics by application of temperatures in a range from 750.degree. C. to 950.degree. C.
Dependencies are inferred from the claim text.