Manufacturing method of micro spherical titanium and titanium alloy powder

A technology of spherical powder and titanium alloy, applied in the field of preparation of fine spherical titanium and titanium alloy powder, can solve the problems of pollution, crucible erosion, shortening the service life of crucible, etc. Effect

Active Publication Date: 2015-04-01
有研增材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional gas atomization process needs to contain the alloy through the melting crucible and melt it, but titanium and titanium alloys are high-melting point, high-activity metals, and they are easy to react with the melting crucible and pollute at high temperature.
At the same time, the crucible is corroded, which greatly reduces the service life of the crucible

Method used

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  • Manufacturing method of micro spherical titanium and titanium alloy powder
  • Manufacturing method of micro spherical titanium and titanium alloy powder
  • Manufacturing method of micro spherical titanium and titanium alloy powder

Examples

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preparation example Construction

[0036] The preparation method of fine spherical titanium and titanium alloy powder of the present invention, at first, select raw material such as TA1 grade sponge titanium to be prepared into TA1, TC4 or TC11 etc. bar), the raw material wire (or bar) is sent into the smelting chamber through the continuous feeder 1 and the metal straightening mechanism (straightener) 2; the smelting chamber and the atomization chamber are pre-vacuumized by the vacuum system 6, Vacuum up to 1×10 -4 ~1×10 -3 Pa, the smelting chamber and the atomizing chamber are filled with high-purity inert gas for atmosphere protection, the oxygen content concentration is <0.00010%, to avoid the oxidation of the ingredients during the smelting process and the powder during the atomization process; 3 pairs of high-frequency induction coils containing titanium are used and titanium alloy wire (or bar) for smelting, the raw material feed rate is 0.2-5Kg / min, the power of the high-frequency induction coil 3 is 5...

Embodiment 1

[0039] The preparation method of fine spherical titanium powder with an average particle size of 45 μm, the method is carried out in the following steps: first, select sponge titanium or pure titanium raw materials higher than or equal to the national standard TA1 grade to make a wire with a diameter of Φ8mm, and the melting chamber and atomization The chamber is pre-vacuumized, and the vacuum degree reaches 1×10 -3 Pa. Use high-purity argon as the protective gas to fill the melting chamber and atomization chamber with a pressure of 1.0×10 5 ~1.2×10 5 Pa, to avoid the oxidation of powder during alloy melting and atomization. The raw material wire is sent into the melting chamber through a continuous feeding mechanism and a straightener, and the titanium wire is heated and smelted by a high-frequency induction coil. The melting power is 10KW, the frequency is 500KHz, and the raw material feeding rate is 5Kg / min. The temperature is controlled at 1750°C. After the titanium wir...

Embodiment 2

[0042] The gas atomization preparation method of fine spherical titanium alloy powder with an average particle size of 28 μm, the method is carried out as follows: first, sponge titanium, aluminum and vanadium are used as raw materials, wherein the purity of the sponge titanium, aluminum and vanadium is ≥99.9%. According to the proportion of TC4 (Ti-6Al-4V) alloy composition, it is made into a wire with a diameter of Φ2mm, and the melting chamber and the atomization chamber are pre-vacuumized, and the vacuum degree reaches 1×10 -4 Pa. Use high-purity argon as the protective gas to fill the melting and spraying chamber, and the equipment pressure is 1.2×10 5 Pa, to avoid the oxidation of powder during alloy melting and atomization. The raw material wire is sent into the melting chamber through the continuous feeding mechanism and straightener, and the titanium alloy wire is heated and smelted by a high-frequency induction coil. The melting power is 5KW, the frequency is 1MHz, ...

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Abstract

The invention relates to a manufacturing method of micro spherical titanium and titanium alloy powder, and belongs to the technical field of metal and alloy powder manufacturing. The manufacturing method comprises the steps that a titanium and titanium alloy wire or bar is manufactured by using sponge titanium in the national standard TA1 grade as a raw material; forvacuum treatment is conducted on a powder manufacturing device, and then the powder manufacturing device is filled with inert protective gas; the raw material wire or bar is fed into a smelting chamber through a continuous feeding mechanism and a straightener, the raw material is heated and smelted through a high-frequency induction coil, and the alloy raw material is molten to form stable liquid flow or drip flow; supersonic atomizing nozzles in atomizers are opened, and breakage, dispersion and forced cooling powder manufacturing are conducted on the molten liquid flow or the drip flow; powder is obtained through a powder collector, and is screened through an ultrasonic vibrating screen to obtain the micro spherical titanium and titanium alloy powder. The micro spherical titanium and titanium alloy powder manufactured through the manufacturing method is small in particle size, high in degree of sphericity, good in liquidity and low in impurity content, and has smooth surfaces.

Description

technical field [0001] The invention relates to a method for preparing fine spherical titanium and titanium alloy powder, belonging to the technical field of metal and alloy powder preparation. Background technique [0002] Titanium and titanium alloys have the advantages of low density, high specific strength, good corrosion resistance and biocompatibility, and are widely used in aerospace, automobile industry, sporting goods and biomedical implant materials and other industrial fields. However, since titanium and titanium alloys are typical difficult-to-machine materials, they have very low thermal conductivity, relatively low elastic modulus and distinct knife sticking characteristics, which make it very difficult to process titanium and titanium alloy materials, and the production efficiency of products with complex shapes Low, high cost. Compared with the traditional powder metallurgy process, new technologies such as metal injection molding, electronic surface mount, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
Inventor 徐骏盛艳伟胡强赵新明朱学新贺会军赵文东陆亮亮张金辉
Owner 有研增材技术有限公司
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