Developments of high power blue diode laser systems for laser metal deposition and welding of pure copper materials

摘要

Pure copper processing is widely demanded in automobile, aerospace and electrical industries and so on since pure copper has excellent properties such as thermal and electrical conductivities. However, high quality welding and cladding of pure copper with near infrared lasers such as fiber, disk and diode lasers have not been performed yet. Their absorption rates of them for pure copper were less than 10 %. Therefore, we focused on blue (450 nm) diode laser with its absorption rate for pure copper of about 60 %. In this paper, we reported development of high power blue diode lasers for welding and additive manufacturing including cladding.