CrCuV solid solution for heterogeneous interface bonding and preparation method and application thereof

Abstract

The invention discloses a CrCuV solid solution for heterogeneous interface bonding and a preparation method and application thereof. The CrCuV solid solution comprises the following components in percentage by weight: 33-42% of copper; 25-35% of vanadium; and the balance of chromium. A gradient material with the CrCuV solid solution as the transition layer is synthesized from the CrCuV solid solution by using a laser additive manufacturing or fusion welding means. The difference in thermal expansion coefficient, melting point, elastic modulus, etc. of the heterogeneous interface is effectivelyalleviated, the residual stress level at the heterogeneous interface during the additive manufacturing process can be reduced, the precipitation of hard and brittle phases is avoided, the manufacturing requirements of heterogeneous parts can be reached, and a high-strength bonding interface is created. The CrCuV solid solution used for the connection of heterogeneous materials can have high connection interface strength and hardness, and can be widely used in the bonding of heterogeneous parts such as steel-aluminum, steel-tungsten, or steel-copper.

Description

technical field [0001] The invention relates to a CrCuV solid solution for bonding heterogeneous interfaces, and a preparation method and application of the CrCuV solid solution. Background technique [0002] With the development of science and technology and the rapid advancement of industry, people have higher and higher requirements for materials. The performance of a single material can no longer meet the requirements of technological development. The composite application of multiple materials has become the trend of the times. The composite of different materials The application can not only achieve higher performance, but also save material cost. [0003] However, dissimilar materials have many problems in joining due to their different physical properties. Taking the connection of steel-aluminum dissimilar metals as an example, due to the large difference in atomic radius between aluminum and iron, the difference in atomic valence and electronegativity, and the smal...

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Problems solved by technology

[0004] At present, steel / aluminum heterogeneous parts are generally prepared by mechanical connection, welding, etc., but because Fe and Al atoms are infinitely soluble in the molten state, the solubility of Fe in Al at room temperature becomes almost zero. Fe will form brittle and hard intermetallic compounds with Al atoms, which will reduce the performance of welded joints, thus affecting the strength of steel-aluminum dissimilar metal connection materials

In the traditional process, fusion welding joints have many advantages such as high strength, good flatness, and strong controllability of welding parameters. However, intermetallic compounds that reduce the joint strength will be produced during the welding process. Welding defects; mechanical connection has the advantages of simple process and guaranteed connection strength, but the airtightness of the joint cannot be guaranteed

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