A heterogeneous material gradient structure connection joint and its preparation method

Abstract

The invention provides a heterogeneous material gradient structure connection joint and a preparation method thereof, which relate to the technical field of material connection and include: a connection part, a first base material part and a second base material part, wherein the connection part includes mutually fitted For the first gradient structure and the second gradient structure, the first base material part is connected to one end of the connection part close to the first gradient structure, the second base material part is connected to the end of the connection part away from the first base material part, and the second base material part is connected to the end of the connection part away from the first base material part. The material of the second base material part and the material of the second graded structure are the same, and in the direction away from the first base material part of the connecting part, the space density of the first graded structure gradually decreases, and the space density of the second graded structure gradually increases . In order to enable the structure of different materials to form a gradient transition structure at the joint, so as to achieve the transition of material properties, avoid the sudden change of different materials at the joint, thereby enhancing the joint strength of dissimilar materials, and at the same time provide a heterogeneous material A method for preparing a junction with a gradient structure.

Description

technical field [0001] The invention relates to the technical field of material connection, in particular to a heterogeneous material gradient structure connection joint and a preparation method thereof. Background technique [0002] In order to achieve specific functionality, it is often necessary to join different materials together in engineering. However, because the properties of the two materials do not match, a large interfacial stress will be generated during the loading process, which can easily lead to interface damage. [0003] In related technologies, the traditional solutions for connecting dissimilar materials are mechanical connection, welding, etc., each of which has defects that cannot be ignored. Among them, mechanical connection, such as the use of screws and nuts, will locally weaken the strength of the base material structure, and there are strict space restrictions and design requirements at the connection part. The welding of dissimilar metal materia...

AI Technical Summary

Problems solved by technology

The welding of dissimilar metal materials will produce brittle phases such as intermetallic compounds, which seriously weakens the connection strength.

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