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Method for improving processability of high-purity tungsten

A processing performance, high-purity technology, applied in the direction of metal processing equipment, manufacturing tools, heat treatment equipment, etc., can solve the problem of low processing yield, achieve the effect of improving the qualified rate of finished products, improving plasticity and toughness, and reducing production costs

Active Publication Date: 2022-05-10
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the defects in the existing high-purity tungsten processing technology, such as material collapse, grain loss, and cracking, the purpose of the present invention is to provide a method for improving the processing performance of high-purity tungsten. The metallographic structure of pure tungsten is different, and for high-purity tungsten with different metallographic structures, corresponding methods are used to improve its processing performance

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  • Method for improving processability of high-purity tungsten

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Experimental program
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Effect test

Embodiment 1

[0056] A method for improving the processing performance of high-purity tungsten, the specific steps of the method are as follows:

[0057] The metallographic structure of the tungsten material with a purity of 99.999% is sampled and tested, and the test results are as follows: figure 1 as shown, figure 1 The scale in the figure is 100μm. The test results show that the metallographic structure of the tungsten material is equiaxed crystal, and the following treatment is carried out:

[0058] (1) The tungsten material is subjected to high-temperature treatment, the temperature of the high-temperature treatment is 1000° C., the holding time is 3.0 h, and the tungsten material after the high-temperature treatment is obtained by cooling with the furnace.

[0059] (2) Forging the high-temperature-treated tungsten material obtained in step (1), with a forging ratio of 1:1, forging a total of 4 times to obtain the forged tungsten material.

[0060] (3) Perform recrystallization anne...

Embodiment 2

[0064] A method for improving the processing performance of high-purity tungsten, the specific steps of the method are as follows:

[0065] The metallographic structure of the tungsten material with a purity of 99.999% is sampled and tested, and the test results are as follows: image 3 as shown, image 3 The scale in the figure is 100μm. The test results show that the metallographic structure of the tungsten material is equiaxed crystal, and the following treatment is carried out:

[0066] (1) The tungsten material is subjected to high-temperature treatment, the temperature of the high-temperature treatment is 1500°C, the holding time is 0.5h, and the tungsten material after the high-temperature treatment is obtained by cooling with the furnace.

[0067] (2) Forging the high-temperature-treated tungsten material obtained in step (1), the forging ratio is 4:1, and forging once to obtain the forged tungsten material.

[0068] (3) Perform recrystallization annealing on the for...

Embodiment 3

[0072] A method for improving the processing performance of high-purity tungsten, the specific steps of the method are as follows:

[0073] The metallographic structure of the tungsten material with a purity of 99.9999% is sampled and tested, and the test results are as follows: Figure 5 as shown, Figure 5 The scale in the figure is 500μm. According to the test results, it can be known that the metallographic structure of the tungsten material is columnar crystal, and the following treatment is carried out:

[0074] (1) The tungsten material is subjected to high-temperature treatment, the temperature of the high-temperature treatment is 1100° C., the holding time is 4.0 h, and the tungsten material after the high-temperature treatment is obtained by cooling with the furnace.

[0075] (2) Forging the high-temperature-treated tungsten material obtained in step (1), the forging ratio is 1:1, and forging once to obtain the forged tungsten material.

[0076] (3) Perform recryst...

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Abstract

The invention relates to a method for improving the processability of high-purity tungsten, and belongs to the technical field of tungsten material processing. According to different metallographic structures of high-purity tungsten, a corresponding machining method is adopted, specifically, the metallographic structure of a tungsten material with the purity of 99.999% or above is detected, and when the metallographic structure of the tungsten material is an isometric crystal, high-temperature treatment, forging, recrystallization annealing and furnace cooling are conducted, so that the machining performance of the tungsten material can be improved; when the metallographic structure of the tungsten material is a columnar crystal, the following treatments are performed: high-temperature treatment, forging, recrystallization annealing, furnace cooling, high-temperature rolling, recrystallization treatment and furnace cooling, so that the processability of the tungsten material can be improved. According to the method, the processing performance of the high-purity tungsten is improved by adopting a corresponding method according to different metallographic structures of the high-purity tungsten and aiming at the high-purity tungsten with different metallographic structures for the first time, and the defects of low processing yield such as material collapse, particle falling and cracking in a high-purity tungsten processing technology are overcome.

Description

technical field [0001] The invention relates to a method for improving the processing performance of high-purity tungsten, belonging to the technical field of tungsten material processing. Background technique [0002] Tungsten is a metal material with high density, high melting point and high hardness. High-purity tungsten usually refers to tungsten materials with a purity of more than 99.999%. have major applications. [0003] The preparation methods of high-purity tungsten mainly include powder metallurgy and chemical vapor deposition. The preparation of high-purity tungsten by powder metallurgy is to use tungsten powder as raw material, press the tungsten powder into shape by isostatic pressing, and then use multiple sintering to increase the density of the material, and finally complete the preparation of high-purity tungsten by forging or rolling. Chemical vapor deposition is the use of hydrogen and tungsten hexafluoride as raw materials or hydrogen and tungsten hexa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/00C22F1/18C21D1/26C21D11/00B21J1/06B21J1/00B21J5/00
CPCC21D8/00C22F1/18C21D1/26C21D11/00B21J1/06B21J1/003B21J5/002Y02P10/20
Inventor 王亚峰王占卫彭立培冀嘉梁林坤冯海波孙秋丽童莹
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP