Method for making an arrangement consisting of a cast part and a cast-in component

Abstract

A method for making an arrangement consisting of a cast part and a cast-in component composed of a metallic material. The cast-in component is composed of a metallic material that has a galvanically applied nickel layer. The layer is applied by positioning the cast-in component in an electrolyte bath and applying the coating on at least part of the surface of the component. The cast-in component is then positioned in a casting mold and a cast part is casted around the cast-in part.

What is claimed is: 
     
         1 . A method for making an arrangement consisting of a cast part, and a cast-in component, around which the cast part is cast, comprising the following steps:
 preparing a cast-in component composed of steel or cast iron or a light-metal alloy,   positioning the cast-in component in an electrolyte bath and applying a coating composed of a galvanically applied nickel layer on at least part of the surface of said cast-in component which is intended to be casted in a casting process,   positioning the coated cast-in part in a casting mould for said cast part, and   casting the cast part around the cast-in part.   
     
     
         2 . The method according to  claim 1 , wherein the nickel layer is applied with a deposition rate of 1.0 μm to 1.4 μm per minute. 
     
     
         3 . The method according to  claim 1 , where the nickel layer is applied at a current-density of 6 A/dm 2 . 
     
     
         4 . The method according to  claim 1 , where the nickel layer is applied at a bath temperature of 60° C. 
     
     
         5 . The method according to  claim 1 , where the nickel layer is applied at a pH value of the electrolyte bath of 2.5 to 3.0. 
     
     
         6 . The method according to  claim 1 , where the nickel layer is applied using an electrolyte comprising an aqueous solution of nickel sulfate. 
     
     
         7 . The method according to  claim 1 , wherein the electrolyte bath contains at least one solid component. 
     
     
         8 . The method according to  claim 1 , wherein the coating after deposition of the nickel layer has a layer thickness of 3 μm to 80 μm. 
     
     
         9 . The method according to  claim 1 , wherein the coating furthermore contains at least one of solids dispersed in the layer 
     
     
         10 . The method according to  claim 1 , wherein the coating furthermore comprises a galvanically deposited carrier layer composed of copper. 
     
     
         11 . The method according to  claim 1 , wherein the coating is applied to a surface region of the cast-in component having a rough depth of 5 μm to 1,400 μm. 
     
     
         12 . The method according to  claim 11 , wherein the coating is applied to a surface region of the cast-in component that has been cast in finished manner or pre-machined by cutting. 
     
     
         13 . The method according to  claim 11 , wherein the coating is applied to a blasted surface region. 
     
     
         14 . The method according to  claim 1 , wherein the cast-in component is a cylinder liner and the cast part is a crankcase of an engine block. 
     
     
         15 . The method according to  claim 1 , wherein the cast-in component is a hoop and the cast part is a break drum. 
     
     
         16 . The method according to  claim 1 , wherein the cast-in component is a ring carrier and the cast part is a piston for an internal combustion engine.