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Preparation method of tantalum 2.5 tungsten alloy

A tungsten alloy and alloy technology, which is applied in the field of preparation of tantalum 2.5 tungsten alloy, can solve the problems of uneven structure, brittle billet, and easy falling off, and achieve the effect of improving easy falling off and brittleness, and solving the uneven structure of the billet

Active Publication Date: 2014-02-05
陕西世纪创优金属材料有限公司
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Problems solved by technology

However, the ingot produced by this method has uneven structure, and the billet is brittle and easy to fall off, so it is necessary to improve

Method used

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Embodiment Construction

[0012] A kind of embodiment of the present invention is described below: the preparation method of tantalum 2.5 tungsten alloy comprises the following steps:

[0013] 1) Prepare tantalum powder and tungsten powder at a ratio of 9:1, put them into a drum mixer, and mix them for 24 hours at a speed of 120r / min;

[0014] 2) Pass the mixed powder through a 120-mesh sieve to obtain fine powder;

[0015] 3) Press the fine powder into alloy bars with a 500-ton hydraulic press;

[0016] 4) Put the alloy rods into the vacuum sintering furnace and vacuumize for 10 -2 Pa, heated to 2400°C, kept warm for 2 hours and taken out to obtain a rough ingot;

[0017] 5) Melting the rough ingot with a vacuum electron beam furnace at least twice to make an alloy ingot;

[0018] 6) Put the alloy ingot into a high-frequency furnace, heat it to 1400°C, take it out and forge it several times to get the finished ingot.

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Abstract

The invention provides a preparation method of a tantalum 2.5 tungsten alloy. The preparation method comprises the following steps: after preparing tantalum powder and tungsten powder in proportion, putting the powder into a drum mixer to be mixed for 24 hours; sieving the mixed powder with a 120-mesh sieve to obtain fine powder; pressing the fine powder into an alloy bar with a 500ton oil press; putting the alloy bar into a vacuum sintering furnace to be sintered to obtain a raw ingot blank; smelting the raw ingot blank at least twice with a vacuum electron beam furnace to prepare an alloy ingot blank; putting the alloy ingot blank into a high frequency furnace to be heated to 1400 DEG C, then taking out the alloy ingot blank and forging the alloy ingot blank for many times, thus obtaining a finished product of ingot blank. The preparation method has the beneficial effects that through full mixing of tantalum powder and tungsten powder and many times of smelting, the problem of nonuniformity of ingot blank tissues is solved and the problems that the blanks easily fall off and become brittle are improved.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and in particular relates to a preparation method of a tantalum-2.5-tungsten alloy. Background technique [0002] Tantalum-tungsten alloy is formed by adding a certain amount of tungsten element based on tantalum, and the Ta-W binary system alloy composed of tantalum and tungsten is an infinite solid solution. Because the strength of tantalum-tungsten alloy is higher than that of pure tantalum, and its corrosion resistance is similar to that of pure tantalum, it has been widely used in the chemical industry and aerospace industry, mainly for the manufacture of heaters, cooling coils, heat exchangers and reactors Wait. The traditional production process of tantalum 2.5 tungsten alloy uses more than two times of vacuum electron beam melting or vacuum arc melting to prepare ingots, and then adopts forging or extrusion at a temperature above 1200 ° C to open the billet, and carrie...

Claims

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Application Information

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IPC IPC(8): C22C1/00C22C27/02
Inventor 蒋忠于杜向杰
Owner 陕西世纪创优金属材料有限公司
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