Disk Laser Welding of Car Body Zinc Coated Steel Sheets

• Autorzy: Lisiecki A. , Burdzik R. , Siwiec G. , Konieczny Ł. , Warczek J. , Folęga P. , Oleksiak B.

Identyfikatory

DOI

10.1515/amm-2015-0465

Warianty tytułu

PL

Spawanie laserem dyskowym blach ze stali karoseryjnej ocynkowanej

• Języki publikacji: EN

Abstrakty

EN

Autogenous laser welding of 0.8 mm thick butt joints of car body electro-galvanized steel sheet DC04 was investigated. The Yb:YAG disk laser TruDisk 3302 with the beam spot diameter of 200 μm was used. The effect of laser welding parameters and technological conditions on weld shape, penetration depth, process stability, microstructure and mechanical performance was determined. It was found that the laser beam spot focused on the top surface of a butt joint tends to pass through the gap, especially in the low range of heat input and high welding speed. All test welds were welded at a keyhole mode, and the weld metal was free of porosity. Thus, the keyhole laser welding of zinc coated steel sheets in butt configuration provides excellent conditions to escape for zinc vapours, with no risk of porosity. Microstructure, microhardness and mechanical performance of the butt joints depend on laser welding conditions thus cooling rate and cooling times. The shortest cooling time t8/5 was calculated for 0.29 s.

PL

W artykule opisano wyniki badań procesu spawania laserowego bez materiału dodatkowego złączy doczołowych blach karoseryjnych ocynkowanych DC04 o grubości 0.8 mm. W procesie spawania zastosowano laser stały Yb:YAG TruDisk 3302 z wiązką laserową o średnicy ogniska 200 μm. Badano wpływ parametrów i warunków technologicznych spawania na kształt i głębokość ściegu spoiny, stabilność procesu spawania, mikrostrukturę i właściwości mechaniczne złączy. Stwierdzono, że wiązka laserowa zogniskowana na górnej powierzchni blach wykazuje tendencję do przenikania przez szczelinę złącza, szczególnie przy niskich energiach liniowych i dużych prędkościach spawania. W całym zakresie parametrów złącza były spawane z utworzeniem kanału parowego, a metal spoiny był wolny od porowatości. Wskazuje to, że konfiguracja złącza doczołowego stwarza dogodne warunki do ujścia par cynku, bez ryzyka porowatości spoin. Mikrostruktura, mikrotwardość i właściwości mechaniczne złączy zależą wyraźnie od warunków spawania, a więc szybkości stygnięcia i czasów stygnięcia. Najkrótszy wyznaczony czas stygnięcia t8/5 był równy 0.29 s.

Słowa kluczowe

EN

car body steel; DC04; laser welding; disk laser; zinc

PL

laser dyskowy; DC04; spawanie laserowe; blacha karoseryjna ocynkowana; cynk

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2015
• Tom: Vol. 60, iss. 4
• Strony: 2913--2922
• Opis fizyczny: Bibliogr. 48 poz., rys.

Twórcy

autor

Lisiecki A.

• Silesian University of Technology, Faculty of Mechanical Engineering, Welding Department, 18A Konarskiego Str., 44-100 Gliwice, Poland

autor

Burdzik R.

• Silesian University of Technology, Faculty of Transport, 8 Krasińskiego Str., 40-019 Katowice, Poland

autor

Siwiec G.

• Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, Krasińskiego Str., 40-019 Katowice, Poland

autor

Konieczny Ł.

• Silesian University of Technology, Faculty of Transport, 8 Krasińskiego Str., 40-019 Katowice, Poland

autor

Warczek J.

• Silesian University of Technology, Faculty of Transport, 8 Krasińskiego Str., 40-019 Katowice, Poland

autor

Folęga P.

• Silesian University of Technology, Faculty of Transport, 8 Krasińskiego Str., 40-019 Katowice, Poland

autor

Oleksiak B.

• Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, Krasińskiego Str., 40-019 Katowice, Poland

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.