Ti-W-Nb intermediate alloy and preparation method thereof

A master alloy, ti-w-nb technology, which is applied in the field of Ti-W-Nb master alloy and its preparation, can solve the problems of master alloy design and preparation difficulty, so as to improve composition uniformity and stability, reduce segregation, The effect of avoiding the unstable phenomenon of smelting current

Active Publication Date: 2022-01-04
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology

In addition to the matrix elements Al, Ti, etc., other alloying elements are usually added to the raw materials through master alloys. Conventional alloying elements such as Si, Mo, and Zr have relatively mature master alloy products that can meet the needs of alloying to prepare titanium alloys, but For some high melting point alloying elements W, Ta, etc., there are still great difficulties in the design and preparation of intermediate alloys

Method used

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Embodiment Construction

[0022] specific implementation

[0023] The present invention will be further described in detail below in conjunction with examples.

[0024] The steps of the preparation process of this kind Ti-W-Nb master alloy are as follows:

[0025] Step 1, Ti-W-Nb master alloy composition design:

[0026] The designed Ti-W-Nb master alloy is a granular ternary master alloy. The chemical composition of the alloy is as follows: Nb 25%, W 25%, impurity elements less than 0.5%, and the balance is Ti ;

[0027] Step 2: Titanium sponge, Ti-Nb master alloy, and pure tungsten powder are used as raw materials, and the weighing and mixing proportions of the raw materials are: 10% titanium sponge, 41% Ti-Nb master alloy, and 49% pure W powder. Among them, the sponge titanium is required to be 0-grade sponge titanium, with a particle size of 2-12.7mm; the Ti-Nb master alloy is in the form of flakes, with a Nb content of 60.1% by weight, and the rest is Ti; the purity of pure tungsten powder is ≥...

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Abstract

The invention relates to a Ti-W-Nb intermediate alloy and a preparation method thereof. The Ti-W-Nb intermediate alloy comprises the following chemical components of, in percentage by weight, 20-30% of Nb, 20-30% of W and the balance Ti. The intermediate alloy is prepared through smelting by adopting an electron beam furnace, raw materials comprise sponge titanium, Ti-Nb intermediate alloy, pure W powder and the like, the melting point of the titanium-tungsten-niobium intermediate alloy is far lower than that of a tungsten metal simple substance, the intermediate alloy prepared by adopting the method is used for smelting preparation of the W-containing titanium alloy and titanium intermetallic compounds, the uniformity and stability of alloy components can be effectively improved, and the defects of segregation, inclusion and the like of refractory metal elements are reduced.

Description

technical field [0001] The invention relates to a Ti-W-Nb master alloy and a preparation method thereof, belonging to the technical field of alloy material preparation. Background technique [0002] Titanium alloys and their intermetallic compounds can be regulated and optimized by alloying their microstructure and mechanical properties. Different types and contents of alloying elements can have complex effects on oxidation resistance, strength, plasticity, durability, creep and other properties. , using the influence law of alloying can be combined with alloy design and demand for selective addition to obtain titanium alloy products that meet the demand conditions. In addition to matrix elements Al, Ti, etc., other alloying elements are usually added to raw materials through master alloys. Conventional alloying elements such as Si, Mo, and Zr have relatively mature master alloy products that can meet the needs of alloying to prepare titanium alloys, but For some alloying e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/03C22B9/22B22F9/04
CPCC22C14/00C22C1/03C22B9/228B22F9/04
Inventor 张明达曹京霞周毅黄旭
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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