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AssigneeFederal-Mogul Wiesbaden GmbH
InventorsKlaus Staschko, Karl-Heinz Gruenthaler
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A method is described for producing composite multilayer materials which exhibit optimum properties throughout their entire service life. The composite multilayer material comprises a backing layer, a bearing metal layer, an intermediate layer and an electrodeposited overlay, which exhibits a hardness which increases continuously from its surface in the direction of the bearing metal layer. The method provides for the electrodeposition as overlay of a lead-free alloy with at least one hard and one soft component, the current density being modified within the range of from 0.3 to 20 A/dm2 during the deposition process and/or the temperature of the electroplating bath being modified within the range of from 15° C. to 80° C.
A method of producing a composite multilayer material for sliding elements, in which a bearing metal layer and an intermediate layer are applied to a backing layer and an overlay is electrodeposited on the intermediate layer, wherein a lead-free alloy with at least one hard and one soft component is deposited as overlay, the current density being modified within the range of from 0.3-20 A/dm2 during the deposition process and/or the temperature of the electroplating bath being modified within the range of from 15° C. to 80° C.
A composite multilayer material for sliding elements having a backing layer, a bearing metal layer, an intermediate layer and an overlay applied by electrodeposition, wherein the overlay exhibits a hardness which increases continuously from its surface in the direction of the bearing metal layer, and the intermediate layer consists of Co, Fe or Ni+SnNi wherein Ni+SnNi are separate layers and the alloy SnNi contains from 65 to 75% Sn.
A composite multilayer material for sliding elements having a backing layer, a bearing metal layer, an intermediate layer and an overlay applied by electrodeposition wherein the overlay exhibits a hardness which increases continuously from its surface in the direction of the bearing metal layer, and the overlay consists of a lead-free binary alloy with a soft and a hard component selected from the group consisting of CuAg, AgCu, CuSn, SnBi or SnAg.
A composite multilayer material for sliding elements having a backing layer, a bearing metal layer an intermediate layer and an overlay applied by electrodeposition, wherein the overlay, comprises a lead free composition exhibits a hardness which increases continuously from its surface in the direction of the bearing metal layer, and a hard component content of the overlay increases from the overlay surface in the direction of the bearing metal layer from 1 wt. % to 20 wt.
A composite multilayer material for sliding elements having a backing layer, a bearing metal layer, an intermediate layer and an overlay applied by electrodeposition, wherein the overlay exhibits a hardness which increases continuously from its surface in the direction of the bearing metal layer, and the overlay contains 0.1 wt. % to 5 wt. % nickel and/or cobalt.
Dependencies are inferred from the claim text.