A kind of preparation method of fine spherical titanium and titanium alloy powder

The technology of titanium alloy and titanium alloy wire is applied in the field of preparation of fine spherical titanium and titanium alloy powder. Effect

Active Publication Date: 2017-09-12
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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  • A kind of preparation method of fine spherical titanium and titanium alloy powder
  • A kind of preparation method of fine spherical titanium and titanium alloy powder
  • A kind of preparation method of fine spherical titanium and titanium alloy powder

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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 method for preparing fine spherical titanium and titanium alloy powder, belonging to the technical field of metal and alloy powder preparation. The method uses national standard TA1 grade sponge titanium as raw material to make titanium and titanium alloy wire or rod; pre-vacuumize the powder making equipment, and then fill inert protective gas; through continuous feeding mechanism and straightener Feed the raw material wire or bar into the smelting chamber, use the high-frequency induction coil to heat and melt the raw material, so that the alloy raw material is melted to form a stable liquid flow or trickle flow; open the supersonic atomizing nozzle in the atomizer to melt The body fluid flow or drip flow is crushed, dispersed and forced to cool to make powder; the powder is obtained through the powder collector, and the powder is sieved by an ultrasonic vibrating sieve to obtain fine spherical powder of titanium and titanium alloy. The spherical titanium and titanium alloy powder prepared by the method has fine particle size, high sphericity, smooth surface, good fluidity and low impurity content.

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 Patents(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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