Machinery Institute of Harbin Institute of Welding high-power solid-state laser high-frequency oscillation welding technology into the laser-MIG composite surfacing, to overcome a number of technical difficulties, the development of a beam-based scanning of iron or nickel-based materials laser MIG composite surfacing method , Made a major technical innovation of high-power solid-state laser welding process method; and systematic welding experiments were carried out for structural simulation parts of high-strength aluminum alloy and titanium alloy used in aerospace engineering, designed high-strength aluminum alloy, titanium alloy components Based on the engineering application of the welding process and equipment optimization program, the successful realization of the technology in aerospace, military, civil 3 areas of conversion applications.