Medical titanium alloy Ti-13Nb-13Zr ingot and preparation method thereof

Abstract

The invention belongs to the technical field of titanium alloy, and discloses a preparation method of a medical titanium alloy Ti-13Nb-13Zr ingot. The preparation method comprises the following steps:selecting high-quality fine particle sponge titanium and refractory metal Nb powder; according to the ratio of weight percentage of sponge titanium to refractory metal Nb powder of (2 to 4) to 1, mechanically stirring and uniformly mixing by a mixer, and then mixing into an electrode block, and adding sponge zirconium, and pressing into a compact electrode block by an oil press; assembling and welding the compact electrode block into an electrode by a plasma welding unit, and smelting the electrode into the titanium alloy Ti-13Nb-13Zr ingot by a vacuum consumable electro-arc furnace. The preparation method disclosed by the invention has the advantages that the production cost of the titanium alloy Ti-13Nb-13Zr ingot is greatly reduced, the chemical components of the produced titanium alloy Ti-13Nb-13Zr ingot meet the requirements of GB/T3620.1-2016 standard, no refractory metal Nb element is segregated and entrained, and the metallurgical quality is good.

Description

technical field [0001] The invention belongs to the technical field of titanium alloys, in particular to a method for preparing medical titanium alloy Ti-13Nb-13Zr ingots. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] The melting point of titanium is 1668°C, and the melting point of niobium is 2468°C. There is a big difference between the two. When the titanium alloy containing Nb is smelted, Nb is usually added to the Ti-13Nb-13Zr alloy in the form of an intermediate alloy Ti-40-50% Nb. Due to the need The master alloy with high content of refractory Nb metal is easy to produce master alloy non-melting block in the ingot to form serious metallurgical defects; in addition, the preparation process of master alloy with high refractory metal content is complicated, the price is high, and it is difficult to break. Titanium alloys containing refractory metal Nb have the characteristics of low elastic mo...

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Problems solved by technology

[0005] (1) In the prior art, due to the need to add a master alloy (Ti-40-50% Nb) with a high content of refractory Nb metal, it is easy to produce master alloy non-melting lumps in the ingot to form serious metallurgical defects

[0006] (2) The master alloy (Ti-40~50%Nb) with high refractory metal content in the prior art has complex preparation process, high price and difficult crushing

[0007] (3) In the prior art, it is difficult to control the oxygen content of the ingot due to the addition of titanium powder, and the addition of titanium powder increases the cost of the alloy and complicates the process

For titanium alloys containing refractory metal Nb, the uniform distribution of refractory metal Nb elements in the ingot is the key to ensuring subsequent processing and product quality. Usually refractory metal Nb is added as an intermediate alloy (Ti-40-50% Nb), because It is necessary to add a master alloy with a high content of refractory metal Nb, which is easy to produce a non-melting block of the master alloy in the ingot and form serious metallurgical defects. and difficult to break

If the refractory metal Nb and titanium powder are added by powder method, the addition of titanium powder will easily cause difficulty in controlling the oxygen content of the ingot, and the addition of titanium powder will increase the cost of the alloy and complicate the process

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