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A kind of high temperature base WC powder and its preparation method and application

A powder and high-temperature technology, which is applied in the field of high-temperature-based WC powder and its preparation, can solve problems such as difficulty in meeting production needs, insufficient stability of the preparation process, and many defects in grain tungsten powder, so as to reduce equipment investment and achieve good social and economic benefits , Good uniformity of powder particle size

Active Publication Date: 2019-09-24
ZHUZHOU SANXIN HARD ALLOY PRODN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of high-temperature base WC powder is not stable enough, and the grain tungsten powder produced has many defects, poor crystallization, and many distorted grains; it is difficult to meet production needs

Method used

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  • A kind of high temperature base WC powder and its preparation method and application
  • A kind of high temperature base WC powder and its preparation method and application
  • A kind of high temperature base WC powder and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of the high-temperature-based WC powder of this embodiment, the specific operation steps are as follows:

[0032] S1. The FSSS particle size 12μm national standard zero grade WO 3 Carry out pre-grinding treatment for 4 hours in a double-cone mixer equipped with rubber-lined stainless steel balls, and add carbon black to carry out carbon matching once; after mixing evenly, a mixture 1 with a total carbon content of 15.5% is obtained in terms of mass fraction;

[0033] S2. The mixture 1 in step S1 is pressed and molded on a press, and reacted in a hydrogen-free carbonization furnace for hydrogen-free carbonization treatment. The reaction temperature is 1500°C, and the propulsion speed of mixture 1 is 15min / boat; the billet is obtained one;

[0034] S3. After crushing the blank material obtained in step S2, pass through a 100-mesh metal screen, and sample the obtained mixture to determine the total carbon and oxygen content; the total carbon of the ...

Embodiment 2

[0038] The preparation method of the high-temperature-based WC powder of this embodiment, the specific operation steps are as follows:

[0039] S1. The FSSS particle size 14μm national standard zero grade WO 3 Carry out pre-grinding treatment in a double-cone mixer equipped with rubber-lined stainless steel balls for 2 hours, and add carbon black for a carbon preparation; after mixing evenly, a mixture 1 with a total carbon content of 14.8% is obtained by mass fraction;

[0040] S2. The mixture one described in step S1 is pressed and molded, and reacted in a hydrogen-free carbonization furnace for hydrogen-free carbonization treatment. The reaction temperature is 1650°C, and the propulsion speed of the mixture one is 30min / boat; the billet one is obtained;

[0041] S3. After crushing the blank material obtained in step S2, pass through a 100-mesh metal screen, and sample the obtained mixture to determine the total carbon and oxygen content; the total carbon of the obtained mix...

Embodiment 3

[0045] The preparation method of the high-temperature-based WC powder of this embodiment, the specific operation steps are as follows:

[0046] S1. The FSSS particle size 17.5μm national standard zero grade WO 3 Carry out pre-grinding treatment in a double-cone mixer equipped with rubber-lined stainless steel balls for 2 hours, and add carbon black to carry out carbon matching once; after mixing evenly, a mixture 1 with a total carbon content of 13.8% is obtained in terms of mass fraction;

[0047] S2. The mixture one described in step S1 is pressed and molded, and reacted in a hydrogen-free carbonization furnace for hydrogen-free carbonization treatment. The reaction temperature is 1800°C, and the propulsion speed of the mixture one is 40min / boat; the blank material one is obtained;

[0048] S3. After crushing the blank material obtained in step S2, pass through a 100-mesh metal screen, and sample the obtained mixture to determine the total carbon and oxygen content; the tota...

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Abstract

The invention discloses a preparation method of high temperature based WC powder. The preparation method comprises the following steps: performing pretreatment of WO3 and primary addition of carbon, so as to obtain a mixture 1 with the total content of carbon of 13.8%-15.5%; performing compression moulding on the mixture 1 for hydrogen-free carbonization treatment, sieving the moulded mixture 1 after the mixture 1 is crushed, and performing secondary addition of carbon, so as to obtain a mixture 2 with the total content of carbon of 6.08%-6.15%; and performing secondary carbonization treatmenton the mixture 2 under the protection of hydrogen, and sieving the mixture 2 after the mixture 2 is crushed, so as to obtain the high temperature based WC powder. The invention provides a stable preparation process of the high temperature based WC powder, produced grain tungsten powder is less in defect, powder grains grow fully, and the prepared WC powder is good in crystalline perfection and smaller in intracrystalline distortion. In a production process, carbonization equipment can be effectively protected, and water vapor can be prevented from being generated in the carbonization process,so that the maintenance cost of the equipment is reduced.

Description

technical field [0001] The present invention relates to the field of preparation methods of cemented carbide, and more specifically, relates to a high-temperature-based WC powder and its preparation method and application. Background technique [0002] In recent years, with the continuous expansion of the application field of cemented carbide, the material of cemented carbide has developed in two directions: ultra-coarse and ultra-fine. Ultra-coarse cemented carbide has been widely used in the fields of mining rock drilling tools, rolls and stamping dies . [0003] Cemented carbide has high hardness, strength, wear resistance and corrosion resistance, known as "industrial teeth", widely used in military industry, aerospace, machining, metallurgy, oil drilling, mining tools, electronic communications, construction and other fields. With the continuous improvement of the industrial level, people put forward higher requirements for the performance of cemented carbide. As the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/949
Inventor 孙五四张可夫
Owner ZHUZHOU SANXIN HARD ALLOY PRODN CO LTD
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