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Method for adding carbon nanometer tube adjustable hard alloy carbon content

A cemented carbide, carbon nanotube technology, applied in the field of cemented carbide materials, can solve problems such as decarburization

Inactive Publication Date: 2007-01-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention applies nanotechnology to transform the traditional cemented carbide industry, adopts carbon nanotubes to adjust the carbon content of cemented carbide, not only can solve the problem of decarburization of cemented carbide, but also carbon nanotubes in cemented carbide structure It can also play a role in strengthening and toughening cemented carbide, improving the mechanical properties such as hardness and strength of cemented carbide

Method used

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  • Method for adding carbon nanometer tube adjustable hard alloy carbon content
  • Method for adding carbon nanometer tube adjustable hard alloy carbon content
  • Method for adding carbon nanometer tube adjustable hard alloy carbon content

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Experimental program
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specific Embodiment approach 1

[0011] Specific embodiment one: the adding process of carbon nanotube of present embodiment is as follows: a. add carbon nanotube in cemented carbide powder, the addition amount of carbon nanotube calculates according to following formula, and total addition is less than cemented carbide powder 1.0wt%:

[0012] Cx = M ( 100 - C a 100 - C n - 1 )

[0013] In the formula: the added weight of Cx-carbon nanotube; The weight of M-hard alloy powder; The total carbon percentage that Cn-hard alloy requires; Ca-hard alloy actual total carbon percentage by weight; b .Pour the weighed carbon nanotubes into a beaker filled with anhydrous ethanol solution to achieve ...

specific Embodiment approach 2

[0014] Specific embodiment two: the adding process of this embodiment is as follows:

[0015] 1) The raw material is single-walled carbon nanotubes with a purity greater than 95%, and the diameter of the carbon nanotubes is between 1nm and 10nm.

[0016] 2) Various alloy powders can be used for cemented carbide powder, and the particle size of the powder ranges from 10 nanometers to 50 microns.

[0017] 3) According to the severity of the carbon deficiency, the amount of carbon nanotubes added is calculated according to the following formula. Generally, the total amount added should be less than 1.0% of the weight of the cemented carbide powder:

[0018] Cx = M ( 100 - C a 100 - C n - ...

specific Embodiment approach 3

[0022] Specific embodiment three: the addition process of this embodiment is as follows: there is 10Kg of WC-6Co cemented carbide powder, and the total carbon content of the alloy recorded through sintering test and Co magnetic detection is 5.52wt%. figure 1 , image 3 , figure 1 is the X-ray diffraction pattern of the decarburized WC-6Co cemented carbide after sintering, where W 3 C 3 C is the η phase, that is, the decarburized phase, image 3 The scanning electron microscope picture of the decarburized WC-6Co cemented carbide after sintering shows that the carbon content is as low as 5.52wt%, and the required total carbon content is 5.81wt%, calculated according to the formula:

[0023] Cx = M ( 100 - C a 100 - C n ...

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Abstract

A method for regulating the content of carbon in hard alloy by adding carbon nanotubes includes such steps as calculating the amount of the carbon nanotubes to be added, weighing the carbon nanotubes, adding them to the solution of absolute alcohol, ultrasonic dispersing, adding it to hard alloy powder, adding surfactant, low-energy ball grinding in vacuum or inertial gas, and vacuum drying.

Description

Technical field: [0001] The invention relates to a method for adjusting the carbon content of cemented carbide, which belongs to the field of cemented carbide materials. Background technique: [0002] Cemented carbide is based on refractory metal carbides (WC, TiC, Cr 2 C 3 etc.) as the matrix and a multi-phase composite material with iron group metals (Co, Fe, Ni) as the binder. Cemented carbide has the characteristics of high hardness, good wear resistance, high mechanical strength, and good corrosion resistance. It is used as cutting tools, molds, wear-resistant, corrosion-resistant and high-temperature resistant materials, etc. It is widely used in geological exploration and national defense industry. my country's cemented carbide is divided into five categories according to the main components, tungsten-cobalt (symbol YG, composition WC, Co), tungsten-titanium-cobalt (symbol YT, composition WC, TiC, Co), general-purpose alloys (symbol YW, composition WC, TiC, TaC (Nd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C29/06B22F9/04
Inventor 沈军孙剑飞张法明
Owner HARBIN INST OF TECH