Laser Welding Techniques for Fabrication of Naval Vessels.

摘要

This work represents a preliminary investigation of the use of high power lasers for welding a variety of exotic materials at high speeds in several joint configurations. The results of the program indicate that high speed narrow,deep penetration welds similar to those made with a vacuum electron beam are achievable with a 10KW laser. However,to generate porous-free welds it is imperative that the gas shielding be done properly. The problem of gas shielding is particularly aggravated at the very high speeds achievable in some of the thinner materials. However,shiny beads were obtained in titanium,even at speeds of 300 IPM,and over. The aluminum welds were far from satisfactory,but indications obtained outside the scope of this program with 1/4inch thick 2219aluminum indicate solid welds can be achieved. (Author)