Powder metallurgy preparation method of titanium or titanium alloy products, titanium or titanium alloy products

A powder metallurgy, titanium alloy technology, applied in the powder metallurgy preparation of titanium or titanium alloy products, in the field of titanium or titanium alloy products, can solve the problem of high cost, achieve the effect of low equipment requirements, avoid inert gas environment, easy to operate

Active Publication Date: 2020-07-21
UNIV OF SCI & TECH BEIJING
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  • Abstract
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Problems solved by technology

The preparation method forms an organic coating layer by coating the surface of HDH titanium or titanium alloy powder, which can inhibit the increase of the oxygen content of the powder during the preparation of the material, and at the same time utilize the in-situ self-generation of the coating agent polycarbosilane (PCS) technology, which realizes the uniform distribution of the strengthening phase in the titanium matrix, significantly improves the mechanical properties of the material, and solves the technical problem of high cost in the preparation of titanium or titanium alloy products in the prior art

Method used

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  • Powder metallurgy preparation method of titanium or titanium alloy products, titanium or titanium alloy products
  • Powder metallurgy preparation method of titanium or titanium alloy products, titanium or titanium alloy products
  • Powder metallurgy preparation method of titanium or titanium alloy products, titanium or titanium alloy products

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preparation example Construction

[0038] The invention discloses a method for preparing titanium or titanium alloy products by powder metallurgy, which comprises the following steps:

[0039] (1) Preparation of surface treatment agent: 3-aminopropyltrimethoxysilane, vinylbenzylaminoethylaminopropyltrimethoxysilane hydrochloride, 3-diethylenetriaminopropyltrimethoxy Silane or N,N-dimethyl-3-aminopropyltrimethoxysilane is dissolved in xylene or toluene to obtain a solution with a mass volume concentration of 0.002-0.01g / mL, and then polycarbosilane (PCS) is dissolved in the above In the solution, a solution with a mass volume concentration of 0.003-0.05 g / mL was obtained.

[0040](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, mechanically or magnetically Stir for 0.2-0.6h, then ultrasonically treat in an ultrasonic cle...

Embodiment 1

[0046] Using hydrogenated dehydrogenation titanium powder with a median particle size of 18.3 μm and an oxygen content of 0.14wt.% as raw material, the scanning electron microscope morphology photo is as follows figure 1 shown.

[0047] 0.5wt.% of 3-aminopropyltrimethoxysilane was dissolved in toluene organic solvent to prepare a solution with a concentration of 0.008g / mL, and then 1wt.% of polycarbosilane (PCS) was dissolved in the solution , to prepare a mixed solution with a concentration of 0.02g / mL.

[0048] The raw materials were added to the prepared mixed solution, sealed with high-purity argon protection, magnetically stirred for 0.4 h, and then ultrasonically treated in an ultrasonic cleaner for 0.3 h to prepare a slurry with a solid-to-liquid ratio of 2.1 g / mL.

[0049] The prepared slurry was put into a vacuum drying oven, and dried at 60° C. for 2 hours to prepare coated powder.

[0050] The coated powder is packed into a soft film and cold isostatically pressed...

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Abstract

The invention discloses a powder metallurgy preparation method of a titanium or titanium alloy product and the titanium or titanium alloy product. The powder metallurgy preparation method of the titanium or titanium alloy product includes the following steps that a surface treating agent is prepared, specifically, an amino silane type coupling agent and polycarbosilane are sequentially dissolved in an organic solvent, and a coating solution is prepared; hydrogenated dehydrogenized titanium or titanium alloy powder is added to the surface treating agent, and a slurry is prepared; drying treatment is conducted on the slurry, and coating powder is prepared; the coating powder is pressed into a raw blank material; and sintered treatment is conducted on the raw blank material, and the titaniumor titanium alloy product is prepared. According to the preparation method, the surface of coating powder is coated to form an organic coating layer, increase of the oxygen content of the powder in the material preparation process can be inhabited, meanwhile the authigenic technology of a coating agent PCS is used, the strengthening phase in a titanium substrate is uniformly distributed, the mechanical property of the material is improved, and thus the technical problem that in the prior art, the cost is high in the preparation of the titanium or titanium alloy product is solved.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a method for preparing titanium or titanium alloy products by powder metallurgy, and titanium or titanium alloy products. Background technique [0002] Titanium and titanium alloys are widely used in various fields such as aerospace, marine engineering, and medical materials because of their high specific strength, good thermal stability, excellent corrosion resistance, and good biocompatibility. However, the poor machinability of titanium and titanium alloys has become an obstacle to mass production of parts with complex shapes. As a near-final forming technology, powder metallurgy technology can realize the one-time forming of titanium and titanium alloy parts, avoid or reduce the machining of materials, improve the utilization rate of materials, effectively reduce the cost of preparation, and obtain uniform and fine structures. Therefore, it has become one of the mo...

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 路新潘宇李维斌徐伟曲选辉
Owner UNIV OF SCI & TECH BEIJING
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