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Preparation method for spherical titanium or titanium alloy powder

The technology of titanium alloy powder and titanium alloy wire is applied in the field of preparation of spherical titanium or titanium alloy powder, which can solve the problems of high equipment requirements and electrode pollution, and achieve the effects of good fluidity, high sphericity and low oxygen content

Active Publication Date: 2016-12-14
CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition of the spherical metal powder prepared by this method is easy to control, and the sphericity is good, but the requirements for the equipment are high, and there is a certain amount of electrode pollution.

Method used

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  • Preparation method for spherical titanium or titanium alloy powder
  • Preparation method for spherical titanium or titanium alloy powder
  • Preparation method for spherical titanium or titanium alloy powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Take a titanium wire with a diameter of 0.2mm and put it into the feeder, and then use argon to flush and leak the preparation system;

[0033] 2) Pass sheath gas (argon flow rate is 30slpm, hydrogen flow rate is 2slpm) and center gas (argon gas flow rate is 2slpm) into the plasma generator, adjust the system pressure to 27.6Kpa, turn on the high-frequency power supply and excite the plasma, and then Introduce the auxiliary air flow and adjust the flow rate to 25slpm, gradually adjust the system air pressure to 103.4Kpa, and adjust the system power to 15KW;

[0034]3) After the system stabilizes, turn on the feeder and start feeding at a rate of 12g / min, and feed the carrier gas (argon gas, the flow rate is 2slpm) into the feeder, and the titanium wire is sent into the plasma generator under the protection of the carrier gas Medium vaporization smelting, melting rapidly in the plasma high-temperature area, the formed melt is broken up into tiny metal droplets in the ...

Embodiment 2

[0040] 1) Take a titanium alloy wire with a diameter of 2mm (the composition is Ti+6wt.%Al+4wt.%V) and put it into the feeder, and then flush and leak check the preparation system with argon;

[0041] 2) Pass sheath gas (argon gas flow rate is 75slpm, hydrogen gas flow rate is 6slpm) and center gas (argon gas flow rate is 6slpm) into plasma generator, adjust system pressure to be 34.5Kpa, open high-frequency power supply and excite plasma, then Introduce the auxiliary air flow and adjust the flow rate to 45slpm, gradually adjust the system air pressure to 110.2Kpa, and adjust the system power to 60KW;

[0042] 3) After the system is stable, open the feeder and start feeding at a rate of 50g / min, and feed carrier gas (argon gas, flow rate of 4 slpm) into the feeder, and the titanium alloy wire is sent into the plasma for generation under the protection of the carrier gas Vaporization and smelting in the vessel, and rapid melting in the plasma high-temperature area, the formed m...

Embodiment 3

[0046] Repeat Example 1, the difference is:

[0047] In step 1), the diameter of the titanium wire is 6mm;

[0048] In step 2), the sheath gas to be fed is: the flow rate of argon gas is 300 slpm, the flow rate of hydrogen gas is 80 slpm; the flow rate of argon gas in the center gas is 100 slpm, and the auxiliary gas flow is introduced and the flow rate is adjusted to 100 slpm, and the system pressure is gradually adjusted to 130.9Kpa , adjust the system power to 200KW;

[0049] In step 3), the feeder feeds at a rate of 200 g / min and feeds carrier gas (argon, with a flow rate of 6 slpm) into the feeder.

[0050] In step 4), the powder is sequentially passed through -150 mesh and +325 mesh sieves under the protection of argon to obtain spherical titanium powder with a main particle size range of 45-106 μm, and the average particle size of the spherical titanium powder is 72.5 μm.

[0051] The microscopic appearance of the spherical titanium alloy powder prepared in this embod...

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Abstract

The invention discloses a preparation method for spherical titanium or titanium alloy powder. The preparation method is characterized in that a titanium wire or a titanium alloy wire is taken as a raw material, and induction plasmas are taken as a heat source for preparing the spherical titanium or titanium alloy powder. According to the preparation method disclosed by the invention, the threadlike titanium wire or the titanium alloy wire is taken as the raw material, so that the problems such as low purity and relatively high oxygen content caused by a powdered raw material are avoided from the source; the titanium or titanium alloy powder is prepared by taking the induction plasmas as the heat source; and the prepared spherical titanium or titanium alloy powder has the advantages of being high in purity, high in degree of sphericity, good in mobility, low in oxygen content, narrow in grain size distribution and the like; the prepared titanium or titanium alloy powder has an average grain size which is adjustable between 10 [mu]m to 100 [mu]m; and the whole preparation process is free of electrode pollution.

Description

technical field [0001] The invention relates to the field of metal and alloy powder preparation, in particular to a method for preparing spherical titanium or titanium alloy powder. Background technique [0002] Titanium and titanium alloys are lightweight and high-strength metal materials with high corrosion resistance and high heat resistance, and are widely used in aviation, aerospace, military, medical equipment and other fields. Titanium and titanium alloys are made into micron-sized spherical powders with good fluidity, and components with complex structures and irregular shapes can be made by means of injection molding and isostatic pressing. In recent years, with the rise of a new powder metallurgy technology - additive manufacturing (3D printing) technology, the application fields of spherical titanium and titanium alloy powders have been continuously expanded, and the market capacity has been increasing day by day. Additive manufacturing technology can use high-en...

Claims

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Application Information

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IPC IPC(8): B22F9/06B22F1/00
CPCB22F9/06B22F2999/00B22F1/065B22F2202/13
Inventor 张振军秦海青刘文平林峰卢宗柳张健伟雷晓旭蒙光海卢安军
Owner CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD
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