Gas atomization preparation method of fine spherical titanium or titanium alloy powder

A titanium alloy and gas atomization technology, which is applied in the field of gas atomization preparation of fine spherical titanium or titanium alloy powder, can solve the problems of oxidation of fine spherical titanium or titanium alloy powder, achieve low cost, prevent powder oxidation, reduce The effect of the reaction

Inactive Publication Date: 2014-06-11
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of preparation and powder oxidation of fine spherical titanium or titanium alloy powder, a

Method used

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  • Gas atomization preparation method of fine spherical titanium or titanium alloy powder
  • Gas atomization preparation method of fine spherical titanium or titanium alloy powder
  • Gas atomization preparation method of fine spherical titanium or titanium alloy powder

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Preparation of Fine Spherical Ti-6Al-4V Alloy Powders with an Average Particle Size of 45 μm by Gas Atomization

[0031]Sponge titanium, aluminum and vanadium are used as raw materials, and the ingredients are prepared according to the proportion of TC4 (Ti-6Al-4V) alloy. The purity of sponge titanium, aluminum and vanadium is ≥99.9%. Pre-vacuumize the vacuum chamber and melting furnace, and the vacuum degree is 1×10 -4 Pa, filled with high-purity argon for atmosphere protection to prevent oxidation of alloy powder. Use a water-cooled copper crucible for pure melting, the melting temperature is 1650 ° C, and atomization starts after 20 minutes of heat preservation. Double-layer atomizing nozzles are adopted, and high-purity argon gas is used as the atomizing medium to carry out atomization treatment through the main nozzle (tight coupling nozzle), and the atomization pressure is controlled at 1.5~3.5MPa. Hydrogen passes through the secondary nozzle to passivate, cool ...

Embodiment 2

[0033] Preparation of Fine Spherical TC11 Alloy Powder with Average Particle Size of 28 μm by Gas Atomization

[0034] Titanium sponge, aluminum, molybdenum, zirconium, etc. are used as raw materials, and the ingredients are prepared according to TC11 (Ti-6Al-3.5Mo-1.8Zr) alloy. The purity of titanium sponge, aluminum, molybdenum, and zirconium is ≥99.9%. Pre-vacuumize the vacuum chamber and melting furnace, and the vacuum degree is 1×10 -4 Pa, filled with high-purity helium for atmosphere protection to prevent oxidation of alloy powder. The alloy powder is purely smelted in a water-cooled copper crucible, the melting temperature is 1550°C, and the atomization treatment is carried out after 60 minutes of heat preservation for full alloying. Double-layer atomizing nozzles are adopted, and high-purity helium is used as the atomizing medium to carry out atomization treatment through close-coupled nozzles, and the atomization pressure is controlled at 6.0~7.0MPa. Hydrogen passes...

Embodiment 3

[0036] Preparation of fine spherical titanium powder with an average particle size of 10 μm by gas atomization

[0037] Made of titanium sponge, the purity is ≥99.9%. Pre-vacuumize the vacuum chamber and melting furnace, and the vacuum degree is 1×10 -4 Pa, filled with high-purity argon for atmosphere protection to prevent powder oxidation. Use a water-cooled copper crucible for pure melting, the melting temperature is 1700 ° C, and atomization starts after 45 minutes of heat preservation. Double-layer atomizing nozzles are adopted, and high-purity argon gas is used as the atomizing medium for atomization treatment through close-coupled nozzles, and the atomization pressure is controlled at 6.5~9.5MPa. Hydrogen passes through the secondary nozzle to forcibly passivate, cool and disperse the molten droplets, and the atomization pressure is controlled at 1.5MPa. The powder is collected by cyclone separation and the powder is sieved and vacuum packed. According to the test an...

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Abstract

The invention provides a gas atomization preparation method of fine spherical titanium or titanium alloy powder. The method comprises the following steps: 1) selecting titanium sponge, titanium hydride or titanium for proportioning with at least two kinds of alloy elements; 2) performing vacuum pre-pumping treatment to a smelting chamber and an atomization chamber, and then infilling argon or nitrogen shield gas; 3) smelting the titanium-containing mixture by using a water-cooled copper crucible to form titanium or titanium alloy melt; 4) performing atomization and hydrogenation to the titanium or titanium alloy melt by adopting a dual-layer atomizing nozzle to obtain powder; 5) after the powder is cooled, collecting the fine spherical titanium or titanium alloy powder through cyclone separation.

Description

technical field [0001] The invention belongs to the technical field of high-activity metal powder preparation, and in particular provides a gas atomization preparation method of fine spherical titanium or titanium alloy powder. Background technique [0002] Due to its low density, high specific strength, good corrosion resistance, excellent heat resistance, non-magnetic and other excellent properties, titanium or titanium alloys are widely used in aerospace, automotive industry, bioengineering, sporting goods and environmental protection. However, due to its poor processing performance, the cost of manufacturing products with complex shapes is high, which greatly limits the application of titanium alloys in non-aerospace fields. Near-net-shaping technology of powder metallurgy can produce near-finished shape parts, thereby greatly reducing processing costs, which has attracted great attention of scientific researchers. Powder metallurgy near-net shape technology requires fi...

Claims

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Application Information

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IPC IPC(8): B22F9/08
Inventor 赵新明盛艳伟张永忠徐骏张少明
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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