Microstructural Aspects of Twin-Spot Laser Welding of Dp-Hsla Steel Sheet Joints

• Autorzy: Stano S. , Grajcar A. , Wilk Z. , Różański M. , Matter P. , Morawiec M.

Identyfikatory

DOI

10.1515/amm-2016-0125

• Języki publikacji: EN

Abstrakty

EN

The article presents the possibility of using twin-spot laser welding (i.e. laser welding with focusing a laser beam on two spots) for making overlap joints made of 0.8-1 mm thick HSLA and DP type high strength steel sheets. Joints were made using a Yb:YAG disc laser having a maximum power of 12 kW and a welding head by means of which it was possible to focus a laser beam on two spots, 0.6 mm and 1 mm away. The angle between focuses amounted to 0° or 90°, whereas the power distribution was 50%-50%. With settings as presented above it was possible to obtain high-quality overlap joints. The geometrical parameters of the joints were primarily affected by beams positions (in relation to each other) and, to a lesser degree, by the distance between the focuses. It was possible to obtain a 10% hardness reduction in the fusion zone of the DPHSLA steel joints if the angle between the beams amounted to 90°. The tests also involved microstructural examinations of individual zones of the joints.

Słowa kluczowe

EN

DP steel; HSLA steel; weldability; overlap joint; twin-spot welding

• 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: 2016
• Tom: Vol. 61, iss. 2A
• Strony: 731--740
• Opis fizyczny: Bibliogr. 28 poz., rys.

Twórcy

autor

Stano S.

• Institute of Welding, 16-18 Bl. Czesława Str., 44-100 Gliwice, Poland

autor

Grajcar A.

• Silesian University of Technology, 18a Konarskiego Str., 44-100 Gliwice, Poland

autor

Wilk Z.

• Silesian University of Technology, 18a Konarskiego Str., 44-100 Gliwice, Poland

autor

Różański M.

• Institute of Welding, 16-18 Bl. Czesława Str., 44-100 Gliwice, Poland

autor

Matter P.

• Silesian University of Technology, 18a Konarskiego Str., 44-100 Gliwice, Poland

autor

Morawiec M.

• Silesian University of Technology, 18a Konarskiego Str., 44-100 Gliwice, Poland

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