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src="files/01_inhalte/bilder-seiten/Know-How-Centre/Verfahren/Schweissen/UP-Schwei%C3%9Fen/Kjellberg-UP-Technologie.jpg" width="600" height="429" alt="Kjellberg UP-Schweißen Technologie" title="Kjellberg - UP-Schweißen Technologie"> </figure> <p>Das Unterpulver-Schweißen, kurz auch UP-Schweißen genannt, ist ein Lichtbogenschweißverfahren, bei dem der Schweißlichtbogen unsichtbar zwischen einer endlosen Elektrode und dem Werkstück brennt. Der Lichtbogen und das Schmelzbad sind durch ein körniges Pulver abgedeckt. Ein Schutz der Schweiß<span class="s2" style="color: #222222; font-family: Lato,Roboto,sans-serif; font-size: 13.93px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"></span>zone vor dem Einfluss der Atmosphäre besteht durch die aus dem Pulver gebildete Schlacke. Ein hoher thermischer Wirkungs<span class="s2" style="color: #222222; font-family: Lato,Roboto,sans-serif; font-size: 13.93px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"></span>grad durch die Pulver<span class="s2" style="color: #222222; font-family: Lato,Roboto,sans-serif; font-size: 13.93px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"></span>abdeckung führt zu einer hohen Abschmelz<span class="s2" style="color: #222222; font-family: Lato,Roboto,sans-serif; font-size: 13.93px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"></span>leistung im Vergleich zu anderen Schweiß<span class="s2" style="color: #222222; font-family: Lato,Roboto,sans-serif; font-size: 13.93px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"></span>verfahren. Aus diesem Grund wird das Unterpulver-Schweißen als Hochleistungs<span class="s2" style="color: #222222; font-family: Lato,Roboto,sans-serif; font-size: 13.93px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"></span>verfahren bezeichnet.</p> <p>Wirtschaftlich effizient wird UP-Schweißen ab einer Blechdicke von 6 mm angewendet. Die vielfältigen Anwendungsfälle, in denen das Unterpulver-Schweißen eingesetzt wird, reichen vom Schiffbau über den Brücken- und Stahlbau bis zur Behälterfertigung. Das Verfahren wird sowohl zum Verbindungsschweißen als auch zum Auftragen von Verschleiß- und Korrosions<span class="s2" style="color: #222222; font-family: Lato,Roboto,sans-serif; font-size: 13.93px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"></span>schutz<span class="s2" style="color: #222222; font-family: Lato,Roboto,sans-serif; font-size: 13.93px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"></span>schichten eingesetzt. Unlegierte und legierte Stähle sowie Chrom-Nickel-Stähle können verschweißt werden. Hochleistungs<span class="s2" style="color: #222222; font-family: Lato,Roboto,sans-serif; font-size: 13.93px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"></span>schweiß<span class="s2" style="color: #222222; font-family: Lato,Roboto,sans-serif; font-size: 13.93px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"></span>verfahren wie das UP-Schweißen werden vor allem mechanisiert oder automatisiert eingesetzt. Kürzere Schweißzeiten, verbunden mit einer höheren Einschaltdauer, führen dazu, dass lange Schweißnähte ohne Unterbrechung geschweißt werden können. Daraus resultieren kürzere Nebenzeiten mit dem positiven Effekt der geringeren Schweißkosten.</p> <p>Die Unterpulver-Schweißtechnik ist an Portalen, Schweißmasten, motorischen Achssystemen oder auf Fahrwagen adaptierbar. 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