Al-Cu alloy wire for additive manufacturing and preparation method and application of Al-Cu alloy wire

Abstract

The invention discloses an Al-Cu alloy wire for additive manufacturing. The Al-Cu alloy wire for additive manufacturing comprises the following chemical components, by mass percentage, 5.5-6.5% of Cu,less than or equal to 0.15% of Fe, less than or equal to 0.06% of Si, 0.26-0.42% of Mn, less than or equal to 0.02% of Mg, less than or equal to 0.10% of Zn, 0.1-0.2% of Ti, 0.10-0.25% of Zr, 0.05-0.15% of V, 0.05-0.25% of Cd, Sn or In, 0.10-0.25% of Sc, less than or equal to 0.0003% of Be, less than or equal to 0.05% of other single elements, less than or equal to 0.15% of total impurities and the balance Al. The invention further provides a preparation method of an alloy of the alloy wire and application of the alloy wire. The problems that a fuse wire additive forming component taking a commercial Al-Cu alloy welding wire as a raw material is prone to micro-crack defects and low in mechanical property are solved.

Description

Technical field: [0001] The invention relates to the technical field of additive manufacturing, in particular to an Al-Cu alloy wire used for additive manufacturing of fuses, a preparation method and application thereof. Background technique: [0002] Aluminum alloy shell segments, brackets, and frame beams are a type of key load-bearing structures in aerospace equipment. In order to meet the requirements of lightweight equipment and high load-bearing efficiency, the design method of structural and functional integration is widely used, and the structure of parts is becoming more and more complex. , The requirements for mechanical properties are getting higher and higher, and Al-Cu alloys are generally used. Casting Al-Cu alloy ZL205A is used. Due to the large wall thickness difference, defects such as shrinkage cavities, shrinkage porosity, cracks, and segregation are prone to occur, and the casting yield is low; using forged Al-Cu alloy 2219, the material utilization rate ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the above existing problems in the prior art, and provides a special wire material for Al-Cu alloy fused wire additive manufacturing, thereby solving the problem that the fused wire additively formed components that use commercial Al-Cu alloy welding wire as raw materials are prone to micro Crack defects, low mechanical properties

Compared with 2219 aluminum alloy, microalloying elements cadmium, tin or indium are added to promote the precipitation of strengthening phases during heat treatment of additive components and solve the problem of low mechanical properties

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