Zr-Nb-based alloy with good additive manufacturing forming performance and application of Zr-Nb-based alloy

Abstract

The invention discloses a Zr-Nb-based alloy with good additive manufacturing forming performance and application of the Zr-Nb-based alloy, and belongs to the technical field of metal additive manufacturing. Components of the Zr-Nb-based alloy are from a dual cluster alloy component design model. The expression formula of the alloy element atomic percent (at. / %) is Zr75+ / -2(Zr, Mo, Sn)3.1+ / -0.5(Zr,Ti, Hf, Nb, Ta)21.9+ / -1.5, wherein (Zr, Ti, Hf, Nb, Ta) elements are single, or the mixed total quantity is 21.9+ / -1.5 at. / %, (Zr, Mo, Sn) elements are single, or the mixed total quantity is 3.1+ / -0.5 at. / %, and the total quantity of the other elements is controlled within 1 at.%. The main alloying element of the alloy is the Nb element; the low-elasticity-modulus Nb element has low magnetic susceptibility; meanwhile, grains of the alloy can be refined; the oxidization resistance of alloy melt and melt stability are improved; liquid-solid phase areas are reduced; flowability is enhanced; andthe alloy has good melt and solid structure compatibility and can be used for additive manufacturing forming.

Description

technical field [0001] The invention relates to a Zr-Nb base alloy with good additive manufacturing forming performance and application thereof, which is expected to be used in the technical field of metal additive manufacturing. Background technique [0002] Zr-Nb-based alloys are the main materials for medical devices and implants because of their high strength, good toughness and biocompatibility, low magnetic susceptibility and Young's modulus. However, traditional processing methods are used to process the implants. Due to the differences in the shape and size of the implants of different patients, it is necessary to mold according to the specific requirements of different patients, which will consume a lot of time and cost. Additive manufacturing is an emerging manufacturing process that is based on digital models and uses high-energy beam particle flow as a heat source to accumulate materials point by point or layer by layer to form three-dimensional solid parts. Bec...

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Problems solved by technology

At present, most of the alloys used in additive manufacturing are traditional casting alloys or forging alloys, but the composition design of these alloys is based on the process characteristics, microstructure, alloying characteristics and strengthening and toughening mechanism of the alloy in the casting or forging process. The manufacturing process characteristics determine that its microstructure and alloying characteristics must be quite different from traditional castings or forgings, so that the design of these alloys usually cannot give full play to the mechanical properties of additive manufacturing components, and it is necessary to redefine the special alloys for additive manufacturing. Design, and the main feature of additive manufacturing is that the alloy undergoes the whole process from melting to solidification in a short time, so the core material selection is based on high melt stability and compatibility between the melt and the solid structure, while the structure From the source point of view, the various properties of the material are related to the chemical process

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