Laser connection method based on laser material additive manufacturing technology

Abstract

A laser connection method based on the laser material additive manufacturing technology relates to a welded connection method of a special material. According to the laser material additive manufacturing principle, and by utilizing the laser depositing method and the layer-by-layer piling method, a new material shaped like the welding seam between two base materials is formed between the welding seam of two connecting materials and the formed new material is further utilized to connect the two base materials. According to the laser connection method based on the laser material additive manufacturing technology, provided by the invention, the metallurgical composition of the welding seam and the joint performance are improved, near-net forming connection is realized, materials are greatly saved, the cost is reduced, weld defects are controlled, the degree of automation is high, and the operation is easy; besides, a fiber laser, a YAG solid laser, a semiconductor laser or CO2 laser are taken as the core, and a powder feed device, a protective gas system and a cooling system are taken as auxiliary appliances, therefore the overall system is high in automation level, can realize whole-process computer control, and is simple in operation processes and further easy to implement.

Description

technical field [0001] The invention relates to a laser connection method based on laser additive manufacturing technology, which belongs to the field of material processing. Background technique [0002] The concept of additive manufacturing technology was first proposed in the late 1970s to early 1980s, which included dozens of molding processes such as Selective Laser Sintering (SLS), Laminated Object Manufacturing (LOM), and more. "Time" magazine listed additive manufacturing technology as "the ten fastest-growing industries in the United States"; the British "Economist" believes that "additive manufacturing technology will promote the third industrial revolution and will also change the production organization model". Both the world's scientific and technological powers and emerging countries will cultivate and support additive manufacturing technology as a new growth point for future industrial development, so as to seize the commanding heights of the future technologi...

AI Technical Summary

Problems solved by technology

However, due to the huge differences in the physical, chemical and mechanical properties of dissimilar materials, the requirements for the connection method are relatively strict, and there are: metallurgical incompatibility, brittle compound phases formed at the interface, residual stress due to mismatching of thermophysical properties, and mechanical properties. The huge difference in performance leads to mechanical mismatch at the connection interface, resulting in serious stress singular behavior, etc.; these problems make the connection of dissimilar materials difficult, and affect the joint organization, performance and mechanical behavior, and the integrity and reliability of the structure will be seriously affected

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