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Abstract

Laser-Beam welding is one of a number of newly-developed procedures for processing metals and despite the initial high installation costs it has readily been taken up for use in industrial applications. This is because of its very high energy input (=/> 106 W/sq.cm) and its focussing capacity, allowing it to be used for surface treatment, drilling, cutting and welding. CO2-lasers are particularly favoured as they can weld steel plates up to 30 mm thick. Laser welding produces very neat seam geometry with all the attendant advantages but it does require careful preparation of the surfaces and this investigation compares the results of welding operations with and without filler wires. It was found that the convention filler-wires SG2, M42 and M10 are not suitable for laser welding but that special alloyed wires such as M10/2 produced significantly better results. It is entirely suitable for the fine-grained S355N but only conditionally for the S690Q grade. Cold-wire processing is preferable to hot-wire or hybrid processing with conductively-heated wire giving the worst results but with further development, the hybrid procedure might offer economic advantages. Overall it was found that laser welding with appropriate filler-wires offers advantages for the welding of thick plates

Additional information

Authors: BEYER E, Fraunhofer-Institut fur Lasertechnik (DE);MALY H, Fraunhofer-Institut fur Lasertechnik (DE);DAHL W, Institut fur Eisenhuttenkunde der RWTH (DE);NIESSEN T, Institut fur Eisenhuttenkunde der RWTH (DE)
Bibliographic Reference: EUR 18441 DE (1998) 151pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-4646-6
Record Number: 199910885 / Last updated on: 1999-07-05
Category: PUBLICATION
Original language: de
Available languages: de
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