Ultrafast laser differential micro-nano texturing method for metal welding joint

An ultra-fast laser and metal welding technology, applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve the problems of weak corrosion resistance and wear resistance, and achieve the effect of improving corrosion resistance and wear resistance

Active Publication Date: 2018-08-17
SHANGHAI UNIV OF ENG SCI
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  • Application Information

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Problems solved by technology

It is precisely because of the difference in phase composition and microstructure of each area that the corrosion resistance and wear resistance of the welded joint, especially the heat-affected zone, are weaker than those of the base metal area.

Method used

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  • Ultrafast laser differential micro-nano texturing method for metal welding joint
  • Ultrafast laser differential micro-nano texturing method for metal welding joint
  • Ultrafast laser differential micro-nano texturing method for metal welding joint

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the implementation of the present invention is not limited to the following embodiments.

[0022] Such as figure 1 and figure 2 As shown, according to the differences in phase composition and microstructure in different regions of the metal welded joint, the metal welded joint is divided into weld zone (A), heat-affected zone (B) and base metal zone (C), and the weld zone The surface of (A) is generally a curved surface, and the surfaces of the heat-affected zone (B) and the base metal zone (C) are flat or curved. During the welding process, the physical and chemical changes in the weld zone, heat-affected zone and base metal zone of the metal welding joint are different. Even in their respective areas, the physical and chemical changes are also different. There are also differences in phase composition and microstructure in the respective areas of...

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Abstract

The invention belongs to the technical field of laser micro processing and particularly relates to an ultrafast laser differential micro-nano texturing method for a metal welding joint. The ultrafastlaser differential micro-nano texturing method is a morphology-controllable differential functionalized micro-nano texturing technology based on ultrafast laser accurate zone selection. Targeted functionalized micro-nano texturing is conducted on differential phase components and microstructures of different zones (a weld zone, a heat affected zone and a base material zone) of the metal welding joint with an ultrafast laser as an energy source, thus surface transformation and modification are conducted on surface and end face zones of the joint, and the corrosion-resisting and abrasion-resisting properties of the surface and end zones of the metal welding joint are improved accordingly.

Description

technical field [0001] The invention belongs to the technical field of laser micromachining, and in particular relates to an ultrafast laser differential micro-nano texture method for metal welding joints. Background technique [0002] Welding of metal materials is a manufacturing process and technology that joins the same or dissimilar metals by heating, high temperature or high pressure to achieve permanent connection. It is widely used in aerospace, automobile manufacturing, ship manufacturing and other fields. . Metal welding methods mainly include fusion welding, brazing and friction stir welding. Among them, fusion welding is to partially melt the joint parts by heating to form a molten pool. After the molten pool is cooled and solidified, the joint parts are connected to each other. In fusion welding, other welding materials may be filled while heating the welded parts to assist welding. The main feature of brazing is to use a metal material with a lower melting poi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/00
Inventor 赵万芹王凌志杨瑾陈捷狮于治水秦优琼
Owner SHANGHAI UNIV OF ENG SCI
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