Method for preparing hydrogenated titanium alloy powder

A titanium alloy and powder technology is applied in the field of preparation of titanium hydride alloy powder, which can solve the problems of small alloy structure, low technical maturity, and difficulty in realizing near-final forming of complex components, and achieves fine powder particle size and wide application. The effect of market and important application value

Inactive Publication Date: 2015-04-22
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Traditional titanium alloy forming mainly adopts casting and forging methods. Forged titanium alloy has high performance, but it is difficult to realize near-net forming of complex components, and the material utilization rate is low. Casting method can obtain near-net forming titanium alloy components, but the It is difficult to avoid production and casting defects, and the performance is low; the powder metallurgy method can not only realize the near-net shape of complex components, but also obtain an alloy structure with fine grains, high density, and high mechanical properties
However, in China, the field of titanium and titanium alloy powder metallurgy is still in the research stage due to the limitation of technology development and equipment, and it is still in the research stage. The alloy has high activity in the liquid state, and is easy to react with other materials and gases such as oxygen and nitrogen, so it is difficult to prepare

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The steps and technological process of this embodiment are as follows:

[0016] 1. Bake the TC4 titanium alloy blocks at 100°C for 2 hours after sand blasting, pickling and cleaning.

[0017] 2. Put the cleaned titanium alloy fast material into the hydrogenation furnace, evacuate to 0.1Pa, then heat and inject hydrogen at a temperature of 450°C for 8 hours, the hydrogen pressure in the furnace is 100000Pa, and cool down to 50°C with the furnace baked;

[0018] Step 2: Crushing the hydrogen-treated titanium alloy masterbatch in an argon-protected glove box through a pulverizer to obtain a powder with an average particle size of 0.5 mm;

[0019] Step 3: Put the crushed titanium alloy particles into a fluidized bed jet mill for grinding, the grinding pressure is 0.5 MPa, and the speed of the separator is 10000 rpm;

[0020] Step 4: Collect titanium hydride alloy powder.

[0021] The particle size of the collected powder was detected, and the average particle size was 1....

Embodiment 2

[0023] The steps and technological process of this embodiment are as follows:

[0024] 1. Bake the TC4 titanium alloy blocks at 100°C for 2 hours after sand blasting, pickling and cleaning.

[0025] 2. Put the cleaned titanium alloy fast material into the hydrogenation furnace, evacuate to 0.1Pa, then heat and feed hydrogen at a temperature of 850°C for 3.5 hours, the hydrogen pressure in the furnace is 1Pa, and cool to 100°C with the furnace baked;

[0026] Step 2: smashing the hydrogen-treated titanium alloy masterbatch in an argon-protected glove box to obtain a powder with an average particle size of 5 mm;

[0027] Step 3: Put the crushed titanium alloy particles into a fluidized bed jet mill for grinding, the grinding pressure is 0.9 MPa, and the speed of the separator is 1000 rpm;

[0028] Step 4: Collect titanium hydride alloy powder.

[0029] The particle size of the collected powder was detected, and the average particle size was 85.6 microns.

Embodiment 3

[0031] The steps and technological process of this embodiment are as follows:

[0032] 1. Bake the TC4 titanium alloy blocks at 80°C for 3 hours after sand blasting, pickling, and cleaning.

[0033] 2. Put the cleaned titanium alloy fast material into the hydrogenation furnace, evacuate to 0.1Pa, then heat and feed hydrogen at a temperature of 550°C for 5 hours, the hydrogen pressure in the furnace is 1Pa, and cool down to 80°C with the furnace baked;

[0034] Step 2: smashing the hydrogen-treated titanium alloy masterbatch in an argon-protected glove box to obtain a powder with an average particle size of 5 mm;

[0035] Step 3: Put the crushed titanium alloy particles into a fluidized bed jet mill for grinding, the grinding pressure is 0.7MPa, and the speed of the separator is 7000 rpm;

[0036] Step 4: Collect titanium hydride alloy powder.

[0037] The particle size of the collected powder was detected, and the average particle size was 10.5 microns.

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Abstract

The invention provides a method for preparing hydrogenated titanium alloy powder. According to the method, firstly, hydrogen treatment is conducted on titanium alloy master batch, so that the titanium alloy master batch is embrittled and then coarsely crushed, then the titanium alloy master batch is ground through a fluidized bed jet mill, and then the hydrogenated titanium alloy powder with fine granularity is prepared. By means of the method, the process is simple, cost is low, the powder granularity is fine, the hydrogenated titanium alloy powder is clean and free of pollution, efficiency is high, and the method is suitable for producing the hydrogenated titanium alloy powder in a mass mode.

Description

technical field [0001] The invention relates to a method for preparing titanium hydride alloy powder, which belongs to the technical field of powder metallurgy. Background technique [0002] Titanium alloy treatment has the characteristics of low density, high strength and strong corrosion resistance, and is widely used in aviation, aerospace, chemical and other fields. Traditional titanium alloy forming mainly adopts casting and forging methods. Forged titanium alloy has high performance, but it is difficult to realize near-net forming of complex components, and the material utilization rate is low. Casting method can obtain near-net forming titanium alloy components, but the The method is difficult to avoid production casting defects, and the performance is low; the powder metallurgy method can not only realize the near-net shape of complex components, but also obtain an alloy structure with fine grains, high density, and high mechanical properties. However, in China, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04
Inventor 朱郎平李建崇南海黄东赵嘉琪
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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