100W blue direct diode laser induced copper plate fabricated by laser metal deposition

Abstract

A blue direct diode laser induced laser metal deposition system [LMD], which uses multi laser combining method, was developed in order to realize a dense, fine and purity layer formation. In order to investigate the pure copper layer formation on stainless steel type 304 [SUS304], the synchrotron X ray analysis was carried out to observe the melting and solidification process in real time while the laser irradiation. For the substrate, a stainless steel 304 substrate with a width of 0.5 mm was used for x ray image of high-intensity synchrotron radiation. Experimental conditions were a laser output power of 80 W, a scanning speed was varied from 10 mm/s and a powder feed rate was set at from 14 mg/s to 80 mg/s. X-ray energy of the laser was 30keV.In this study in order to investigate the dependence of the powder feed supply, the powder feed rate was varied from 14 to 80 mg/s. As the results, it was confirmed that the layer thickness and copper layer angle depended on the powder feed rate.