Preparation method of copper-aluminum gradient alloy transition joint for submarine cable welding

Abstract

The invention discloses a preparation method of a copper-aluminum gradient alloy transition joint for submarine cable welding, which comprises the following steps of: respectively preparing copper-aluminum composite powder with different copper / aluminum proportions by using a mechanical alloying method in advance, preparing a copper-aluminum gradient connecting material by using a layer paving type composite electrodeposition process, and preparing a copper-aluminum gradient alloy transition joint by using aluminum as a cathode; before deposition, a composite powder thin layer is uniformly laid on the upper surface of an aluminum cathode, copper is adopted as an anode, and copper ions are deposited on an aluminum cathode plate and pores filled with the composite powder; and the copper-aluminum composite powder thin layers are laid layer by layer and deposited layer by layer, and gradient change of the copper / aluminum proportion is achieved in the height direction in the laying process. The aluminum-copper gradient material is prepared by combining gradient layer-by-layer composite powder laying and a composite electrodeposition process, so that generation of an aluminum brittle phase can be effectively avoided, designable transition of a copper / aluminum ratio is realized, and meanwhile, good combination between the composite powder is realized; the method is simple in principle, high in forming speed, capable of achieving gradient change of material components and high in applicability.

Description

technical field [0001] The invention relates to the field of material preparation and forming, in particular to a preparation method of a copper-aluminum gradient alloy transition joint for submarine cable welding. Background technique [0002] Marine engineering equipment and marine materials are the material premise for expanding marine space and developing marine resources, the material basis for implementing marine technological innovation and building marine ecological civilization, and the material guarantee for enhancing marine national defense strength and safeguarding marine rights and interests. Submarine cables are mainly used between land islands, crossing rivers or harbors, connecting drilling platforms from land or interconnecting between drilling platforms, etc. With the implementation of the strategy of strengthening the country with marine resources, it will play an increasingly important role. The laying of submarine cables is usually divided into two parts...

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Problems solved by technology

[0005] It is difficult to achieve near net shape by traditional preparation methods. CN112676681A discloses a method for manufacturing gradient materials with uniform lateral transition in additive manufacturing. The method uses a heat source to move at a constant speed, and continuously adds another material during the moving process. Slow down to achieve heating and sintering, and the materials are fully fused, but affected by the thermal expansion coefficients of the two materials, it is easy to cause cracks at the junction of the materials

CN202110719736.4 discloses a continuously changing tungsten-copper functionally graded material and its preparation method. The controllable ratio of tungsten precursor solution and copper precursor solution is sprayed into a spray pyrolysis furnace to obtain tungsten and copper with continuously changing components. Oxide composite powder, reduction, pressing, and sintering can obtain tungsten-copper functionally graded materials with continuous composition changes, but the process is more complicated

CN201911298039.5 discloses a method for preparing a bionic impact-resistant multi-layer composite gradient material based on amorphous alloys. The bionic impact-resistant multi-layer composite gradient material is prepared by selective laser melting forming technology. The material has good impact resistance, but the cost is relatively high. high

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