J. Phys. IV France
Volume 04, Number C4, Avril 1994
3rd International Conference Laser M2P
Page(s) C4-81 - C4-84
3rd International Conference Laser M2P

J. Phys. IV France 04 (1994) C4-81-C4-84

DOI: 10.1051/jp4:1994416

Laser cladding of copper base alloys onto Al Si7 Mg0.3


Centre de Traitement des Matériaux par Laser, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

Certain copper alloys have proved to be suitable for laser cladding onto aluminium base. By using the blown powder technique with a 1.5 KW CO2 laser, clads without cracks or porosity have been produced. The base material has the composition Al Si7 Mg0.3 and the clads are made from alloyed copper with varying contents of Ni, Fe, Si and Al. Aluminium dilution in the clad can be kept lower than 1 wt%. Particularly rough interfaces were observed between the clad material and the remelted zone of the substrate. These interfaces present only narrow and irregular intermetallic areas. Crack free interfaces can be achieved for clads with hardnesses up to 350 HV0.l. Clads, microstructure and interfaces which form in the clad are discussed.

© EDP Sciences 1994