A modified stirring head for friction stirring surface processing

Abstract

The invention discloses a stirring head for adding special powder materials and stirring a friction surface for machining modifying. The stirring head is mainly composed of a lower shaft shoulder (1)and an upper shaft shoulder (2), the lower shaft shoulder (1) and the upper shaft shoulder (2) are connected through bolts, and the upper shaft shoulder (2) is connected with a clamping handle (3); and the stirring head is characterized in that the upper portion of the lower shaft shoulder (1) is provided with a hollow cavity (4), the lower portion of the lower shaft shoulder (1) is provided withspiral groove holes (5), the inlets of the spiral groove holes (5) communicate with the hollow cavity (4), and the right side of the upper portion of the lower shaft shoulder (1) is provided with an injection hole (6) for allowing plasticized metal (7) to be injected. According to the stirring head, the wear resistance and the corrosion resistance of a metal surface layer are greatly improved, theefficiency is high, the cost is low, and the popularization and application are convenient.

Description

technical field [0001] The invention relates to a material modification technology, especially a tool for improving the surface of metal materials through friction stir welding technology, in particular, a stirring head for increasing the friction stir surface processing modification of special powder materials . It incorporates metal powder into the metal surface by agitation to improve surface performance. Background technique [0002] The surface modification of metal materials can greatly improve its application range, especially for some metal materials used in special environments, such as wear and corrosion environments, it is necessary to find ways to improve the wear resistance and resistance of the metal used. corrosive. Although the traditional electroless plating method can improve the performance of metal materials in this respect, it pollutes the environment and its use is limited. The invention is based on extruding some special materials into the surface o...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of serious pollution in the traditional surface modification technology, and to design a stirring head for increasing the friction stir surface processing modification of special powder materials, which adds some modified metal powder on the metal surface , and blend the metal powder into the metal surface by stirring to improve the surface performance

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