Messer Se &co. Kgaa

Zf Friedrichshafen Ag

Messer Group Gmbh

Air Liquide Deutschland Gmbh

Bernd Hildebrandt

Dirk Kampffmeyer

Georg Selders

Andre Patzenhauer

Johannes Weber

Frank Wagenknecht

Mario Rockser

Thomas Böckler

Matthias Dusil

Cerkez Kaya

Achim Wankum

Michael Wolff

When welding with a consumable wire electrode, current contacting occurs when the electrode wire passes by a readily electrically conductive contact element. In order to improve the current contacting and reduce the wear of the contact element in particular, the invention proposes subjecting contact elements to a cold treatment prior to using same. The cold treatment has a cooling phase during which the temperature of the contact element is reduced to a lower target temperature, a subsequent holding phase in which the contact element is substantially held at the target temperature, and a final heating phase, in which the contact element is brought to an upper target temperature. The use of contact elements treated using the method according to the invention leads to a substantial increase of the wear resistance compared to untreated contact elements.

Method for improved current contacting when welding using a current-carrying wire electrode

According to the invention, a metal workpiece made by additive manufacturing is subjected, following the additive manufacturing process, to a cold treatment in which the workpiece is cooled to a lower target temperature of less than minus 30° C. in a cooling phase and is then heated up to an upper target temperature in a heating phase. The cold treatment significantly improves the properties of the workpiece in respect of the mechanical quality thereof.

Method for finishing a workpiece made by additive manufacturing

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Tönisvorst, Germany

Bernd Hildebrandt