Paper Title:
Flux-Less Joining Technique of Aluminium with Zinc-Coated Steel Sheets by a Dual-Spot-Laser Beam
  Abstract

Joining of iron with aluminium in the liquid phase is complicated due to the formation of brittle intermetallics within Fe-Al melts. In this work we present the technology of a laser weldingbrazing (LWB) process to join zinc-coated steel and aluminium sheets in an overlap geometry. The process is divided into welding of the aluminium sheet and brazing of filler material and molten aluminium sheet onto the zinc-covered steel sheet to avoid the liquid stage of iron. It is possible to join those materials with a single laser beam. However, with a second laser beam, the melt flow can be controlled more effectively and the wetting behaviour can be improved by preheating the zinc-covered steel sheet surface. This is beneficial since the process works without any flux agent. Wetting lengths increase by using this technique and generate a joint that exceeds the tensile strength of the base material. Due to the zinc cover on the steel sheet there are two possible filler materials that have miscibility with zinc as well as aluminium. Zinc based filler materials have the advantage of a lower melting point and thus lower process temperatures. And aluminium based filler wires result in more ductile brazed seams, making it possible to deform such joints in a later application as tailored blanks.

  Info
Periodical
Main Theme
Edited by
M. Geiger, J. Duflou, H.J.J. Kals, B. Shirvani and U.P. Singh
Pages
163-170
DOI
10.4028/www.scientific.net/AMR.6-8.163
Citation
H. Laukant, C. Wallmann, M. Korte, U. Glatzel, "Flux-Less Joining Technique of Aluminium with Zinc-Coated Steel Sheets by a Dual-Spot-Laser Beam", Advanced Materials Research, Vols. 6-8, pp. 163-170, 2005
Online since
May 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Friedrich Wilhelm Bach, A. Beniyash, K. Lau, R. Versemann
Abstract:Against the background of the required weight reduction in transportation through lightweight construction, the application of hybrid...
143
Authors: T. Kato, Y. Abe, Kenichiro Mori
Abstract:The joinability of three aluminium alloy sheets using a self-piercing rivet was evaluated from a finite element simulation and experiment....
1461
Authors: Y. Abe, T. Kato, Kenichiro Mori
Abstract:The aluminium alloy and mild steel sheets were joined with mechanical clinching. Deforming behaviour of the two sheets during the clinching...
1043
  | Authors: Michael F. Zaeh, Paul Gebhard, Sonja Huber, Markus Ruhstorfer
Abstract:On a global market, new products are subject to rising requirements regarding strength and quality. Simultaneously, the conservation of the...
69
Authors: N. Grittner, B. Striewe, A. von Hehl, D. Bormann, M. Hunkel, H.W. Zoch, F.W. Bach
Abstract:The combination of different metallic materials enables the design of lightweight structures with tailor-made properties at global as well...
67