High power direct diode laser applications and advanced processes

Abstract

High power direct diode laser [HPDDL] systems have achieved record power levels making them an economic alternative to existing heat sources and conventional lasers for many applications. These laser systems can help to create a compact, flexible manufacturing cell ideal for welding, surface cladding, heat treating, brazing and paint stripping applications. The capabilities of this direct diode laser system demonstrated here range from high-speed conduction mode welding, laser surface transformation hardening and laser cladding. Laser welding was demonstrated on ferrous, nonferrous materials, and zinc coated steels with low porosity. Therefore, making HPDDL laser ideal for tube mills and tailor welded blank applications. Laser surface claddings with very low dilution were produced using pre-placed powders yielding high corrosion and wear resistant surfaces. Laser surface transformation hardening of 4140 steel and gray cast iron produced samples with high case depths, high hardness, and low back temper percentages.