Kabel-und Metallwerke Gutehoffnungshutte Aktiengesellschaft

Hans-Joachim Wallbaum

Sheet metal or strips are rolled and heated for dispersion hardening. Disks are cut (punched), stacked, and extruded. The disks in the stack may alternate with disks which have not yet been hardened. Subsequent heat treatment of the extruded product strengthens it throughout. The method is used specifically to make a dispersion-strengthened copper alloy to be used for making electrodes for resistance welding.

Method of making dispersion strengthened products

Disks are cut from copper or a copper alloy which can be precipitation-hardened. A copper alloy powder is prepared and dispersion-hardened. The disks are assembled in a stack and alternate with powder layers and extruded. Subsequent heat treatment of the extruded product strengthens it throughout. The method is used specifically to make a hardened copper alloy to be used for making electrodes for resistance welding.

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Osnabruck, Germany

Hans-Joachim Wallbaum