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Titanium powder coated with oxygen impurity adsorbent and preparation method of titanium powder

An adsorbent and impurity technology, which is applied in the field of titanium powder coated with oxygen impurity adsorbent and its preparation, can solve the problems of insufficient oxygen impurity adsorption capacity, low activity, uneven dispersion, etc., and achieves small size, high activity and impurities. Low content and good dispersion uniformity

Inactive Publication Date: 2021-04-06
INST OF PROCESS ENG CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention aims at problems such as insufficient oxygen impurity adsorption capacity of the oxygen impurity adsorbent in the traditional powder metallurgy titanium alloy due to problems such as large particle size, low activity, and uneven dispersion, and adopts powder fluidization combined with chemical vapor deposition technology to prepare the An oxygen impurity adsorbent that can be uniformly coated on the surface of titanium powder. The oxygen impurity adsorbent has a series of advantages such as small size, high activity, good dispersion uniformity, and low impurity content.

Method used

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  • Titanium powder coated with oxygen impurity adsorbent and preparation method of titanium powder
  • Titanium powder coated with oxygen impurity adsorbent and preparation method of titanium powder

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Experimental program
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Effect test

Embodiment 1

[0049] 1. Hydrodehydrogenation Ti-6Al-4V powder is selected as the raw material, the purity is 98.5%, and the particle size is -200 mesh. Weigh the powder with a mass of 50g and pour it into a conical fluidized bed reactor. The material of the fluidized bed is high-purity quartz. The plate is a quartz sintered plate, the diameter of the cylindrical casing is 60mm, and the diameter of the air inlet and air outlet is 8mm.

[0050] 2. Connect the raw material container heating system, gas control system, fluidized bed reactor, heating system and tail gas treatment device through silicone tubes, check the air tightness, and pass high-purity argon to discharge the air in the entire system at a gas velocity of 0.5 L / min, exhaust time is 60min.

[0051] 3. Start the heating system of the fluidized bed reactor in step 1). After the temperature is raised to 900° C., the powder raw material is added to the fluidized bed reactor, and 0.3 L / min of boron trichloride gas, 0.6 L / min of hyd...

Embodiment 2

[0056] The difference between Example 2 and Example 1 is that the titanium powder raw material is changed from irregular hydrogenated dehydrogenation Ti-6Al-4V powder to spherical gas atomized Ti powder, and the reaction stage is loaded with high-purity lanthanum trichloride. The gas velocity of argon gas, boron trichloride gas, and hydrogen gas are 1L / min, 0.6L / min, and 1.5L / min respectively. The preset temperature of the heating system of the container containing lanthanum chloride is 1100°C. The chemical vapor deposition temperature From 900°C to 950°C, the reaction time increased from 60min to 90min.

[0057] figure 2 For LaB in embodiment 2 6 The SEM image of the coated spherical atomized titanium powder, the change of the powder matrix will not affect the coated LaB 6 The introduction of oxygen impurity adsorbent, but with the increase of reaction temperature and coating time, the powder coated LaB 6 The particle size is 500nm-600nm, but it will not have a significan...

Embodiment 3

[0059] The raw material of this embodiment 3 is Ti-Ni alloy powder, and the gas velocity of high-purity argon gas, boron trichloride gas and hydrogen gas loaded with lanthanum trichloride in the reaction stage are 1L / min, 0.6L / min, 1.5L / min, respectively. min, the preset temperature of the heating system of the container containing lanthanum chloride is 1000°C, the chemical vapor deposition temperature is 1150°C, and the reaction time is 120min.

[0060] Obtained LaB 6 SEM image of coated Ti-Ni alloy powder and figure 1 Similarly, changes in the powder matrix do not affect coated LaB 6 The introduction of oxygen impurity adsorbent, but with the increase of reaction temperature and coating time, the powder coated LaB 6 The particle size is 800nm-900nm, but it will not have a significant impact on coating uniformity.

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Abstract

The invention belongs to the field of manufacturing of powder metallurgy titanium alloy parts, and mainly relates to titanium powder coated with an oxygen impurity adsorbent and a preparation method of the titanium powder. The preparation method is realized by combining powder fluidization with a chemical vapor deposition technology, a specific gas-phase reactant is selected, and oxygen impurity adsorbent particles uniformly and quantitatively coat the surface of the titanium powder by controlling reaction conditions. Compared with an active metal oxygen impurity adsorbent in powder metallurgy titanium alloy, the oxygen impurity adsorbent disclosed by the invention has the advantages of high oxygen absorption efficiency, low impurity content and the like, the sintering density and plasticity of the powder metallurgy titanium alloy can be improved by introducing a small amount of oxygen impurity adsorbent, and the preparation method has the advantages of simple process, short flow, low cost and the like.

Description

technical field [0001] The invention belongs to the field of powder metallurgy titanium alloy parts manufacturing, and mainly relates to a titanium powder coated with an oxygen impurity adsorbent and a preparation method thereof. Background technique [0002] Titanium and titanium alloys have excellent properties such as light weight, high strength, and corrosion resistance, and play an irreplaceable role in many fields such as aerospace, marine chemical industry, weaponry, and automobile industry. However, the processing performance of titanium alloy is poor, the production efficiency of traditional casting, forging and machining processes is low, and the effective utilization rate from raw materials to final parts is less than 12%, which leads to the high cost of titanium alloy application, which seriously limits its application. Applications in many engineering fields. As a near-net-shaping technology for product parts, powder metallurgy technology has a high utilization...

Claims

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Application Information

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IPC IPC(8): B22F1/02C23C16/38C23C16/442
CPCC23C16/38C23C16/442C23C16/4417B22F1/16
Inventor 杨亚锋崔景毅王宇枭黄志涛吕元之李少夫
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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