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Preparation method of multilevel strip-shaped crystalline tungsten alloy material

A tungsten alloy and strip technology, applied in the field of high-density tungsten alloy preparation, can solve problems such as difficulty in greatly improving the performance of tungsten alloys

Active Publication Date: 2019-08-06
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the present situation in the field of research and development of the problem that it is difficult to greatly improve the performance of tungsten alloy by common means, and provides a preparation method of multi-level strip crystal tungsten alloy material

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  • Preparation method of multilevel strip-shaped crystalline tungsten alloy material
  • Preparation method of multilevel strip-shaped crystalline tungsten alloy material

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preparation example Construction

[0020] A method for preparing a multi-level strip crystal tungsten alloy material of the present invention comprises the following steps:

[0021] (1) Weigh tungsten powder, titanium powder and yttrium powder according to the mass percentage of 97.7~99.0:0.6~1.3:0.4~1.0, and carry out the overturning frequency vibration impact treatment, the overturning speed is 20~40 rpm, and the frequency vibration frequency is 4~8Hz , the impact treatment time is 23 to 35 hours, and the micron-scale lamellar tungsten-based composite powder is obtained;

[0022] (2) Add micron-scale lamellar tungsten-based composite powder to 50% SBS alcohol solution for continuous biaxial micro-branching treatment, wherein the powder mass ratio is (87.6-95.1): (4.9-12.4), continuous uniaxial The speed is 2~5rpm, the positive pressure is 4~7MPa, after degreasing at 530℃, it is mixed with liquid paraffin and pressed for molding. 378~435MPa, get green body;

[0023] (3) The green body is placed in a heat col...

Embodiment 1

[0027] (1) Weigh tungsten powder, titanium powder and yttrium powder according to the mass percentage of 99.0:0.6:0.4, and carry out the overturning frequency vibration impact treatment, the overturning speed is 20 rpm, the frequency vibration frequency is 5Hz, and the impact treatment time is 25 hours, and the micron level is obtained. Lamellar tungsten-based composite powder;

[0028] (2) Add micron-scale lamellar tungsten-based composite powder to 50% SBS alcohol solution for continuous biaxial micro-rolling, the powder mass ratio is 87.6:12.4, the continuous single-axis speed is 3 rpm, and the positive pressure is 5 MPa. After degreasing at 530°C, it is mixed with liquid paraffin and pressed into shape. The mass ratio of degreasing powder and molding agent is 94.6:5.4, and the molding pressure is 385MPa to obtain a green body;

[0029] (3) The green body is placed in a normal-pressure inert atmosphere heat collector to be fired and molded at a firing temperature of 1560° C...

Embodiment 2

[0031] (1) Weigh tungsten powder, titanium powder and yttrium powder according to the mass percentage of 98.2:1.0:0.8, and carry out the overturning frequency vibration impact treatment, the overturning speed is 30 rpm, the frequency vibration frequency is 5Hz, and the impact treatment time is 27 hours, and the micron level is obtained. Lamellar tungsten-based composite powder;

[0032] (2) Add micron-scale lamellar tungsten-based composite powder to 50% SBS alcohol solution for continuous biaxial micro-rolling, the powder mass ratio is 87.9:12.1, the continuous single-axis speed is 4 rpm, and the positive pressure is 7MPa. After degreasing at 530°C, it is mixed with liquid paraffin and pressed into shape. The mass ratio of degreasing powder and molding agent is 95.5:4.5, and the molding pressure is 398MPa to obtain a green body;

[0033] (3) The green body is placed in a normal-pressure inert atmosphere heat collection device for firing and molding at a firing temperature of ...

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Abstract

The invention discloses a preparation method of a multilevel strip-shaped crystalline tungsten alloy material. The preparation method comprises the following steps of firstly, carrying out turning-over frequency vibration impact treatment on mixed powder of tungsten powder, titanium powder and yttrium powder in a certain proportion, adding a seaming agent into the obtained micron-sized layered tungsten-based composite powder to carry out biaxial micro-rolling continuation, degreasing, pressing, forming, and finally, placing the material in a normal-pressure inert atmosphere heat collection device for firing and molding to finally obtain the multilevel strip-shaped crystalline tungsten alloy material. The method has high component control precision, strong process stability and strong repeatability, and can realize strengthening and toughening and long service life of the tungsten alloy material.

Description

technical field [0001] The invention relates to the technical field of high-density tungsten alloy preparation, in particular to a preparation method of a multi-level strip crystal tungsten alloy material. Background technique [0002] Polyhedral tungsten particles have some tip facet areas, which are easily dissolved in the liquid phase during the firing process, and then precipitated in larger plane positions, which becomes the main reason for the growth of tungsten grains, and the near-spherical grains have a great influence on crack propagation. The inhibitory effect is limited, and it is difficult to meet the needs of high-performance tungsten alloys. However, traditional methods such as adding grain inhibitors, rapid sintering, and high-energy ball milling have limited improvement in performance. Therefore, it is very important to find a new method to improve the crystal structure of tungsten alloy and improve its performance. [0003] The key means to improve the pe...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C1/04B22F1/00
CPCC22C27/04C22C1/045B22F1/14
Inventor 董洪峰贺志荣
Owner SHAANXI SCI TECH UNIV
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