Casting methods for the production of rotationally symmetric copper bimetals

ABSTRACT

Multiple-material products are characterised by a complex property profile which is achieved by combining the particular advantages of at least two different materials. Bimetal casting is an energy- and material-efficient technology for the production of multi-metallic objects. This paper describes the development of a semi-continuous casting process for the formation of a rotationally symmetric bimetal with a cohesive bonding character at the interface of a copper–tin alloy (CuSn6) and pure copper (Cu99.5). Initial experiments are conducted by static casting to evaluate the thermal process window. Based on the results of the initial experiments, a vertical semi-continuous compound casting process is developed. A stable cohesive bond between the joining partners is accomplished by forming a solid solution at the interface.

This paper is part of a Thematic Issue on Copper and its Alloys.

KEYWORDS:

• Compound casting
• copper alloy
• cohesive bond
• semi-continuous casting
• static casting
• bimetal
• copper compound
• rotationally symmetric compound

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the German Federal Environmental Foundation (DBU) under grant 32334/01-21/2. The authors acknowledge the financial funding from the DBU for the project ‘Energy and material efficient production of copper-composites using horizontal continuous casting’.