Tantalum 2.5 Tungsten Valve

Shaanxi Zhongheng Weichuang Metal Materials Co., Ltd. supplies high-quality rare metals, mainly tantalum, niobium, hafnium, niobium hafnium alloy c103. The purity of the main products can reach up to 99.95% -99.99%. As a professional manufacturer of rare metals, Shaanxi Zhongheng Weichuang Metal Materials Co., Ltd. always adheres to the direct sales model of manufacturers, with direct supply from the source, cutting down intermediaries, and factories directly reaching consumers, eliminating multiple intermediate links and reducing prices by 40%. With the same quality and lower prices, we provide you with the highest quality products and thoughtful services! Whether it's customized specifications or bulk purchases, we can meet your needs at highly competitive prices, truly achieving "worry free quality and better prices"! By choosing us, you can not only obtain high-purity and high-performance rare metal products, but also enjoy thoughtful after-sales service and flexible customization services. Our customer service is available 24 hours a day, making you worry free and at ease. Factory direct sales, transparent prices, quality assurance, Shaanxi Zhongheng Weichuang Metal Materials Co., Ltd. is your trusted high-quality supplier!
Tungsten has the highest melting point among all metals, second only to gold in density and second only to diamond in hardness. Tantalum also has high melting point, high density, and corrosion resistance. In terms of strength and toughness, tantalum 2.5 tungsten combines the advantages of tantalum and tungsten, and has higher toughness and strength than pure tungsten and pure tantalum.
 

 

 

product key technologies

01.

Material preparation process

Alloy melting
Using vacuum electron beam melting (EBM) or vacuum arc melting (VAR) technology, high-purity tantalum powder (≥ 99.99%) is mixed with tungsten powder in a ratio of 2.5:97.5, and the melting temperature needs to reach 3200-3500 ℃ to form a uniform solid solution.
After melting, the ingot needs to undergo multiple forging processes (such as axial upsetting and radial elongation) and acid washing (hydrofluoric acid sulfuric acid mixture) to eliminate segregation.
‌Ingredient control
The oxygen content is strictly controlled at ≤ 100ppm to avoid the formation of brittle oxides.
In 2024, patented technology significantly improves the stability of alloys in high-temperature oxidation environments by adding hafnium element.

02.

Valve Forming Process

Processing of raw materials
Hot processing: Initial forging temperature of 1200-1400 ℃, total processing rate of 75% -85%, ensuring grain refinement (size<30 μ m).
Cold processing: Multi pass drawing (with a reduction rate of 10-20%/pass), combined with intermediate vacuum annealing (1000-1200 ℃) to eliminate stress.
Precision molding
The valve body is processed by a five axis CNC machine, with a surface finish Ra ≤ 0.8 μ m.
Sealing surface is welded with tantalum tungsten alloy powder (plasma spraying process), with a thickness of 0.2-0.5mm.

The preparation of tantalum 2.5 tungsten valves mainly involves five steps, including raw material preparation, forming and sintering, melting and reprocessing, rolling and final treatment, and quality inspection. The first step is to mix ultrafine tantalum powder and tungsten powder in a ratio of 2.5:97.5. Put the mixed powder into a drum mixer and stir evenly to ensure the uniformity and consistency of the powder. Then, the uniformly mixed fine powder is loaded into a mold and pressed into shape to obtain a preliminary alloy billet. The next step is the sintering process, which requires placing the formed alloy billet into a vacuum sintering furnace for vacuum heating and sintering. This step involves forming metallurgical bonds between powder particles to obtain coarse ingots. Coarse ingots need to be melted multiple times using vacuum electron beam furnaces or vacuum arc furnaces to further purify and homogenize the alloy composition, thereby obtaining alloy ingots. In order to improve the performance of alloy ingots, further cold forging treatment is required. Then, the cold forged alloy is subjected to vacuum annealing treatment to eliminate stress and stabilize the structure.
The processing steps and commonly used processes of valves are mainly designed in six steps: casting: pouring the melted metal liquid into the mold, taking out the mold after cooling and solidification, and carrying out subsequent processing and treatment. Forging: By treating metal materials with high temperature and pressure, they are formed in the billet. During the processing, forging can be used to improve the strength and wear resistance of the material. Precision machining: Using mechanical processing and other methods to surface treat and process the processed metal material to meet the needs of the valve. Precision machining: Precision machining of processed metal materials to meet the requirements of valves. Welding: Two metal parts are connected together by arc, laser, or other methods to meet the requirements of the valve. Heat treatment: By using heat treatment methods, the physical and chemical properties of metals are changed, their strength and toughness are improved, and their wear resistance is increased.
In the aerospace field, tantalum 2.5-tungsten valves are widely used in the manufacturing of key components such as rocket engines and nozzles.
In the chemical industry, tantalum 2.5 tungsten valves are used to manufacture corrosion-resistant equipment, pipelines, etc.
In the mechanical industry, tantalum 2.5-tungsten valves are commonly used to manufacture working components under high temperature and high pressure, such as valves, pump bodies, etc.

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