Method for preparing aluminum-clad copper plate based on PIT

Abstract

The invention belongs to the technical field of layered composite materials, and discloses a method for preparing an aluminum-clad copper plate based on PIT. The method for preparing the aluminum-cladcopper plate based on PIT comprises the following steps of soaking a polished sample in acetone for 5 minutes to remove oil, washing with water and then with alcohol, and drying the sample with the cold air; compacting a distance within one end of a small-sized pipe through a hydraulic press, wherein the compacted thickness is 1 mm; setting a roll gap to be 4 mm, and performing cold rolling; setting the roll gap to be 1 mm, carrying out cold rolling to obtain a long plate, and cutting the long plate through a shearing machine; setting the roll gap to be 0.5mm, and carrying out cold rolling toobtain a long plate; and annealing the cold rolled plate. According to the method for preparing the aluminum-clad copper plate based on PIT, copper powder is used as a filler, an outer layer takes analuminum tube as a basis, and a high-pressure high-temperature environment is generated through high-speed deformation in a cold rolling process; and according to the principle of powder metallurgy,the internal copper powder is enabled to reach a sintering condition to obtain a blocky copper layer, metallurgical bonding is carried out between the blocky copper layer and the aluminum tube, and the interface property is excellent.

Description

technical field [0001] The invention belongs to the technical field of layered composite materials, and in particular relates to a method for preparing aluminum-clad copper plates based on PIT. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: In recent years, layered composite materials have received extensive attention because of their excellent comprehensive capabilities. The Al-Cu-Al composite layer structure formed by aluminum-clad copper not only combines the characteristics of the two, but also effectively exerts the advantages of the two. In terms of performance (1) the outer layer of aluminum-clad structure completely isolates the inner layer of copper The contact between the core and the outside world effectively prevents the oxidation and deterioration of the copper core, and although aluminum has higher activity than copper, it can form a dense oxide film for aluminum in general environment and acidi...

AI Technical Summary

Problems solved by technology

For the preparation of aluminum-clad copper sheets, there are still very few feasible and effective solutions. The current mainstream preparation process is mainly stack rolling, but there are many problems in the stack rolling process. One is that the bonding strength of the two sheet materials is poor. , Stress concentration is prone to occur at the boundary, and then defects such as holes and gaps are generated. On the one hand, it is due to the difference in deformation behavior of different materials during rolling, and on the other hand, it is due to the difference in thermal expansion coefficient between different materials during the cooling process after rolling. problem, it will produce more serious residual thermal stress and affect the interface strength, so subsequent annealing treatment is necessary for stack rolling

The other is that in the stack rolling process of the plate, if the reduction is too large during cold rolling, it is easy to be difficult to successfully compound, especially for materials with different deformation capabilities, the material is prone to necking during the large deformation process phenomenon that affects the homogeneity of the material

[0003] To sum up, the problems existing in the existing technology are: the current preparation process of aluminum-clad copper sheet is mainly based on stack rolling, and there is a problem of bonding strength between two different materials, which produces relatively serious residual thermal stress and affects the interface strength.

Regardless of work efficiency or economic benefits, stack rolling is not completely suitable for industrial production.

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