Design characteristics and development of a nozzle for coaxial laser cladding
1998; Laser Institute of America; Volume: 10; Issue: 2 Linguagem: Inglês
10.2351/1.521821
ISSN1938-1387
Autores Tópico(s)Laser Material Processing Techniques
ResumoLaser cladding by blowing powder into a laser generated melt pool is finding greater use in industry particularly with the growing interest in direct build and repair techniques currently being investigated. The process is traditionally done with a side blown powder feed. This has the limitation of not being omnidirectional. To overcome this, a coaxial powder feed system has been developed. This article describes a particular system by both mathematical models and experiment. The system has so far achieved a catchment efficiency of up to 40% with a 1 kW CO2 laser beam. The parameters controlling this important commercial parameter are described. They include the flow structure of the powder in the beam. The control of this structure is discussed with reference to this particular coaxial flow system.
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