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Powder surface treatment agent, titanium or titanium alloy powder surface treatment method and composite powder

A technology of powder surface treatment and titanium alloy powder, applied in coating and other directions, can solve the problems of high cost and poor activity, and achieve the effect of low cost, high thermal stability, high density and high performance guarantee

Active Publication Date: 2020-06-26
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

The surface treatment method makes the surface of titanium or titanium alloy powder form an organic coating layer, which can inhibit the increase of oxygen content in the later use and transportation of titanium or titanium alloy powder, and improve the mechanical properties to solve the problem of HDH titanium or titanium alloy in the prior art. The technical problems of poor activity and high cost of titanium alloy powder in the application of high-end titanium products

Method used

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  • Powder surface treatment agent, titanium or titanium alloy powder surface treatment method and composite powder
  • Powder surface treatment agent, titanium or titanium alloy powder surface treatment method and composite powder
  • Powder surface treatment agent, titanium or titanium alloy powder surface treatment method and composite powder

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preparation example Construction

[0035] (1) Preparation of powder surface treatment agent: isopropyl tris (dioctyl pyrophosphate acyloxy) titanate, isopropoxy dioleate acyloxy (dioctyl phosphate acyloxy) titanate Esters, isopropyl tris (dioctyl phosphate acyloxy) titanate or isopropyl tris (dioctyl pyrophosphoryl) titanate are dissolved in xylene or toluene to obtain a mass volume concentration of 0.001-0.004g / mL solution, then at least one of polystyrene (PS) and ABS plastics is dissolved in the above solution to obtain a solution with a mass volume concentration of 0.005-0.04g / mL.

[0036](2) Add hydrogenated dehydrogenated titanium or titanium alloy powder with a particle size median diameter D50 of 10-40 μm and an oxygen content less than or equal to 0.15wt.% to the powder surface treatment agent in step (1), seal inert gas, and mechanically stir for 0.1 -0.5h, then ultrasonically treat in an ultrasonic cleaner for 0.1-0.6h, and prepare a slurry with a solid-to-liquid ratio of 1.2-3.5g / mL.

[0037] (3) ...

Embodiment 1

[0040] Using hydrogenated dehydrogenation titanium powder with a median particle size of 12.3 μm and an oxygen content of 0.15wt.% as raw material, the scanning electron microscope morphology photo is as follows figure 1 shown.

[0041] Dissolve NDZ-201 in xylene organic solvent to prepare a solution with a uniform concentration of 0.003g / mL, and then dissolve PS in the solution to prepare a solution with a uniform concentration of 0.02g / mL.

[0042] Then add raw material powder into the prepared solution, seal with high-purity inert gas protection, mechanically stir for 0.5h, and then ultrasonically treat in an ultrasonic cleaner for 0.2h to make a slurry with a solid-to-liquid ratio of 2.6g / mL.

[0043] The prepared slurry was taken out, put into a vacuum drying oven, and dried at 40° C. for 1 hour to obtain a composite powder.

[0044] The prepared composite powder is used in the powder metallurgy process: put it into a soft film and cold isostatically press it into a gree...

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Abstract

The invention discloses a powder surface treating agent, titanium and titanium alloy powder surface treatment method and composite powder. The powder surface treating agent comprises an organic polymer, a titanate coupling agent and an organic solvent, wherein the organic polymer is at least one of polystyrene and ABS (acrylonitrile butadiene styrene) plastic, the organic solvent is xylene or methylbenzene, the concentration of the organic polymer is 0.005-0.04g / mL, and the concentration of the titanate coupling agent is 0.001-0.004g / mL. The powder surface treating agent is used for carrying out surface treatment on titanium or titanium alloy powder, so that an organic matter coating layer is formed on the surface of the titanium or the titanium alloy powder, the increase of the oxygen content in the later use and transportation processes can be inhibited, the mechanical performance is improved, and the technical problems of poor activity and high cost in the application of the HDH titanium and titanium alloy powder in a high-end titanium product in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a powder surface treatment agent, a surface treatment method for titanium and titanium alloy powder, and a composite powder. Background technique [0002] Titanium and titanium alloys are widely used in various fields such as aerospace, marine engineering, and medical materials because of their low density, high specific strength, good corrosion resistance, and good biocompatibility. However, the titanium and titanium alloys prepared by the traditional casting process are complicated, the material loss is large during secondary processing, and there are problems such as low production efficiency, high production cost, and difficulty in manufacturing parts with complex shapes, which seriously limit the industrialization of titanium and titanium alloys. application level. As an efficient, high-quality, precise and energy-saving near-end forming technology, powder metallu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F3/04B22F3/10C22C1/05C22C14/00C22C1/10
Inventor 路新潘宇李维斌杨芳曲选辉
Owner UNIV OF SCI & TECH BEIJING
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