Rapid prototyping und Freiformflaechenbeschichtung durch 3D-Laser-Auftragschweissen von Metallegierungen Abschlussbericht

The known Rapid Prototyping techniques are generally limited to non-metallic materials. The manufacturing of functional prototypes requires methods for the processing of high-strength metal alloys. Therefore, objective of the project was to build-up the technological base for the new technique of 3D-laser-cladding. Using this technique, the production of metallic prototypes as well as cladding of complex shaped surfaces become possible. Within the scope of the project, a special laser system, consisting of a machine tool, a CO_2-slab-laser and powder feeder technology was built. Besides the CO_2-laser, the machine is linked with a high power Nd:YAG-Laser. The investigation of the CO_2-laser beam resulted in a beam quality coefficient of K=0.78 and a minimum focus diameter of 0.16 mm. Welding experiments with Ni- and Fe-alloys led to flaw-less, filigree samples having a fine-crystalline cast structure. The achieved results are the starting point for the realization of a research project on this subject, in which several industrial partners are involved. (orig.)SIGLEAvailable from TIB Hannover: DtF QN1(60,43) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman