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US 3,945,423 AGranted
Method for the manufacture of a compound casting
AssigneeMahle GmbH
InventorChristoph Hannig
Life of this patent
Estimating the term…
Abstract
A composite casting is produced by electrodepositing a wear resistance material onto a core, immersing the core in an aluminium melt and then casting an aluminium alloy around the core, before detaching the latter. The wear resistant layer may be given a roughened surface before immersing in the aluminium melt, by increasing the current density in the later stages of the depositing. The method may be used for casting light metal cylinders for internal combustion engines.
Claims4
A method for manufacturing a composite casting, comprising the steps of:
- a. electrodepositing a layer of wear resistant material on to a core;
- b. immersing said layer of wear resistant material in an aluminium containing melt to form an intermetallically combined aluminium layer;
- c. casting an aluminium alloy around the aluminium layer in a pressureless manner to form a composite casting on said core;
- and
- d. detaching said composite casting from said core, wherein during a final phase of the electro-depositing process, the current density is increased in such a way that the deposited layer has a roughened-up surface.
2 more elements
Dependencies are inferred from the claim text.