Novel double-beam laser composite laser powder filling welding method and device

Abstract

The invention provides a novel double-beam laser composite laser powder filling welding method which comprises the following steps that 110, the welding purpose is obtained, and filling powder and protective gas are determined according to the type of a welding material and the welding requirement; 120, a preliminary test is performed, process parameters of the two beams of laser are preliminarilyset, an optimal liquid micro-forging area is determined by using a visual tracking system and a temperature sensing system, and the process parameters of the two beams of laser are optimized to update the process parameters; and 130, the novel double-beam laser composite laser powder filling welding is completed according to the related parameters optimized by the preliminary test. Under the action of micro-forging laser on a welding area in a molten state, the number of air holes in a weld joint is restrained, columnar crystals are converted into isometric crystals, the structure is finer, the morphology and the size of a primary phase and an eutectic structure are affected, the dendritic crystal arm distance is shortened, the chemical component nonuniformity of a molten pool area is reduced, and the weld joint structure and the mechanical property are improved.

Description

technical field [0001] The invention relates to the technical field of laser repair, in particular to a novel dual-beam laser composite laser powder filling welding method and device. Background technique [0002] With the rapid progress of laser technology, laser welding has gradually become an indispensable technical means for the development of modern industry. , equipment manufacturing and other fields have been widely used. [0003] Due to the fast cooling and fast heating characteristics of laser welding, the welding head often has problems such as macroscopic surface unevenness, cracks, pores, organizational disorder, and even poor welding. [0004] Therefore, how to improve the structural strength of the welded joint, reduce crack pores, eliminate stress, and improve the mechanical properties of welded parts during the laser welding process is a technical problem to be solved urgently by those skilled in the art. Contents of the invention [0005] The present inv...

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Problems solved by technology

[0003] Due to the fast cooling and fast heating characteristics of laser welding, the welding head often has problems such as macroscopic surface unevenness, cracks, pores, tissue disorder, and even poor welding.

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