WELDING ELECTRODE AND METHOD OF MANUFACTURING A WELDING ELECTRODE

An electrode in which the metallurgical structure of the active surface includes incoherent chromium precipitates, more than 90% of which have a surface of projection of less than 1 μm2, the incoherent chromium precipitates having a size at least between 10 and 50 nm. The electrode further has a fib...

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Bibliographische Detailangaben
Hauptverfasser:	PRIMAUX, François, SOREAU, Thierry, FRANCOIS, Nicolas
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING FERROUS OR NON-FERROUS ALLOYS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY PERFORMING OPERATIONS POWDER METALLURGY SOLDERING OR UNSOLDERING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	An electrode in which the metallurgical structure of the active surface includes incoherent chromium precipitates, more than 90% of which have a surface of projection of less than 1 μm2, the incoherent chromium precipitates having a size at least between 10 and 50 nm. The electrode further has a fibrous structure that is visible in a cross-section of the active surface of the electrode following surfacing and chemical etching. The fibrous structure includes a plurality of radial fibers having a thickness of less than 1 mm and of a substantially central fiberless region that has a diameter of less than 3 mm. The electrical conductivity of the electrode is greater than 85% IUPAC. The method for obtaining the electrode in a continuous casting process as well as to a use of the electrode in a resistive spot welding process.