METHOD AND DEVICE TO CLAD, OR HARD-FACE FOR MINIMIZING ADMIXTURE

An electric arc device and methods to build up, clad (2830), join, or overlay an alloyed metal onto a parent metal (2810) with minimal admixture (2820). The methods employed in the electric arc device provide a high frequency waveform with a high amplitude pulse, a low amplitude background current,...

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Hauptverfasser: PETERS, STEVEN R, HEARN, JAMES E, MORLOCK, MICHAEL J, FULMER, BRUCE E
Format: Patent
Sprache:eng ; fre
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Zusammenfassung:An electric arc device and methods to build up, clad (2830), join, or overlay an alloyed metal onto a parent metal (2810) with minimal admixture (2820). The methods employed in the electric arc device provide a high frequency waveform with a high amplitude pulse, a low amplitude background current, and a special shorting routine, to alleviate the problem of generating too much ad-mixture. A fast transition from a peak current level to a background current level along with a shorting re~ sponse and a plasma boost pulse reduces the droplet size and reduces the heat input required to achieve good welding performance.