Preparation method of high-strength Zr-Ti-based alloy

A high-strength alloy-based technology, applied in the field of powder metallurgy, can solve problems such as poor density of Zr-Ti-based alloys, segregation of Zr-Ti-based alloy components, shrinkage and porosity of structures, etc., and achieve high density, low production cost, low cost effect

Active Publication Date: 2021-04-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0003] Zr-Ti-based alloys are usually prepared by ingot metallurgy. This type of method has problems such as composition segregation, microstructure shrinkage and shrinkage of the obtained Zr-Ti-based alloys, resulting in poor density of Zr-Ti-based alloys, generally 95-97%, need subsequent heat treatment and thermal deformation to eliminate structural defects

Method used

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  • Preparation method of high-strength Zr-Ti-based alloy
  • Preparation method of high-strength Zr-Ti-based alloy
  • Preparation method of high-strength Zr-Ti-based alloy

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preparation example Construction

[0026] The invention provides a kind of preparation method of Zr-Ti base alloy, comprises the following steps:

[0027] After mixing the Zr powder and the Ti powder, a mixed powder is obtained;

[0028] The mixed powder is subjected to cold isostatic pressing to obtain a molded green body;

[0029] The shaped body is sintered to obtain a Zr-Ti based alloy.

[0030] In the present invention, mixed powder is obtained after Zr powder and Ti powder are mixed.

[0031] In the present invention, the mass ratio of the Zr powder to the Ti powder is preferably 1:99˜99:1, more preferably 80:1˜1:80, further preferably 60:1˜1:60. In the present invention, the particle diameters of the Zr powder and the Ti powder are independently preferably 5-45 μm, more preferably 10-30 μm.

[0032] In the present invention, the mixed powder preferably further includes a trace amount of metal powder. In the present invention, the trace metal powder preferably includes one or more of Cr powder, V powd...

Embodiment 1

[0047] Weigh Zr powder with a particle size of 10 μm, Ti powder with a particle size of 10 μm and Co powder with a particle size of 10 μm, wherein the mass ratio of Zr powder to Ti powder is 4:1, and the amount of Co powder added accounts for 1% of the total mass. %. The above powder is ball milled on a planetary ball mill, the ball milling medium is absolute ethanol, the volume ratio of the total volume of Zr powder and Ti powder to absolute ethanol is 1:2, and the dispersant is Tween-80, Tween-80 The mass is 0.2wt.% of the total mass of the Zr powder and the Ti powder, the ball milling speed is 200r / min, the ball milling time is 6h, the ball-to-material ratio is 3:1, and the diameter of the ball is 10mm to obtain the mixed material;

[0048] Dry the mixed material in a vacuum drying oven at a temperature of 30°C for 5 hours to obtain a mixed powder;

[0049] The obtained mixed powder is pressed into shape by a cold isostatic pressing process, the pressure is 200MPa, and the...

Embodiment 2

[0053] Weigh Zr powder with a particle size of 10 μm and Ti powder with a particle size of 10 μm, wherein the mass ratio of Zr powder and Ti powder is 9:1, and the above powder is ball milled on a planetary ball mill, and the ball milling medium is absolute ethanol, The volume ratio of the total volume of Zr powder and Ti powder to absolute ethanol is 1:3, the dispersant is Tween-80, the quality of Tween-80 is 0.3wt.% of the total mass of Zr powder and Ti powder, ball milling The rotating speed is 250r / min, the ball milling time is 9h, the ball-to-material ratio is 3:1, and the diameter of the ball is 10mm to obtain the mixed material;

[0054] Dry the mixed material in a vacuum drying oven at a temperature of 30°C for 5 hours to obtain a mixed powder;

[0055] The obtained mixed powder is pressed into shape by cold isostatic pressing process, the pressure is 250MPa, and the pressure holding time is 35min, to obtain the formed green body;

[0056] Put the obtained molded body...

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Abstract

The invention provides a preparation method of a high-strength Zr-Ti-based alloy, and belongs to the technical field of powder metallurgy. The preparation method provided by the invention comprises the following steps of mixing Zr powder and Ti powder to obtain mixed powder; conducting cold isostatic pressing on the mixed powder to obtain a formed blank; and sintering the formed blank to obtain the Zr-Ti-based alloy. According to the method, the porosity between the mixed powder is reduced through cold isostatic pressing, and the density of the formed blank is improved; and by controlling the sintering temperature, the sintering time and the sintering environment in different sintering stages and applying pressure in the third sintering stage, the compactness and the structure uniformity of the Zr-Ti-based alloy are further improved.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a preparation method of a high-strength Zr-Ti-based alloy. Background technique [0002] Zr-Ti based alloys have the advantages of good corrosion resistance, heat resistance, nuclear properties and biocompatibility, and show good application prospects in the fields of aerospace, biomedical and sports equipment and other structural parts. [0003] Zr-Ti-based alloys are usually prepared by ingot metallurgy. This type of method has problems such as composition segregation, microstructure shrinkage and shrinkage of the obtained Zr-Ti-based alloys, resulting in poor density of Zr-Ti-based alloys, generally 95-97%, need subsequent heat treatment and heat deformation to eliminate structural defects. Contents of the invention [0004] In view of this, the purpose of the present invention is to provide a method for preparing a high-strength Zr-Ti-based alloy. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C14/00C22C16/00B22F3/04B22F3/10
Inventor 刘金旭刘爽刘兴伟李树奎吕延伟贺川薛鑫莹冯新娅
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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