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US 12,220,758 B2Granted
Method for pre-treating stainless steel substrates before soldering using nanocrystalline solder foils
AssigneeVacuumschmelze GmbH & Co. KG
InventorsLothar Zapf, Natalia Ankuda, Manfred Reuther
Life of this patent
Estimating the term…
Abstract
A soldered product comprising a first component soldered to a second component is provided. The first component comprises a stainless steel substrate, an adhesion promoter layer made of nickel deposited on at least one joining surface of the stainless steel substrate; and a tin layer deposited on the adhesion promoter layer. The tin layer has a layer thickness in the range of 10-30 μm. The second component is typically a rare earth magnet.
Claims6
A soldered product comprising:
- a component comprising a stainless steel substrate, an adhesion promoter layer made of nickel coating at least one surface of the stainless steel substrate, and a first tin layer coating the adhesion promoter layer;
- and
- a rare earth magnet which is coated with a second tin layer and soldered to the coated stainless steel substrate, wherein the second tin layer is disposed directly on a surface of the rare earth magnet.
A soldered product comprising:
- a component comprising a stainless steel substrate, an adhesion promoter layer made of nickel coating at least one surface of the stainless steel substrate, and a first tin layer coating the adhesion promoter layer;
- and
- a rare earth magnet which is coated with a second tin layer and soldered to the coated stainless steel substrate, wherein a solder joint between the rare earth magnet and the coated stainless steel substrate is obtained from a solder foil.
A soldered product comprising:
- a component comprising a stainless steel substrate, an adhesion promoter layer made of nickel coating at least one surface of the stainless steel substrate, and a first tin layer coating the adhesion promoter layer;
- and
- a rare earth magnet which is coated with a second tin layer and soldered to the coated stainless steel substrate, wherein a solder joint between the rare earth magnet and the coated stainless steel substrate, in a shear test, has a shear strength of more than 15 N/mm2.
Dependencies are inferred from the claim text.