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Preparation method of nanometer WC-Co composite powder

A kind of composite powder and nanotechnology, which is applied in the field of nanocomposite material preparation, can solve the problems of absolute mixing and large particles, uneven powder particle size, easy particle agglomeration cost, etc., and achieve good plating effect and good plating speed. Effect

Inactive Publication Date: 2013-12-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spray transformation method has simple equipment and easy-to-obtain raw materials, but the prepared powder has uneven particle size, easy agglomeration and high cost; the sol-gel method is molecular-level mixing and cannot guarantee uniform mixing and easy agglomeration
The mechanical alloy method has simple equipment and low cost, but the dispersion cannot guarantee absolute uniform mixing and large particles

Method used

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  • Preparation method of nanometer WC-Co composite powder
  • Preparation method of nanometer WC-Co composite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take 10g of WC powder with an average size of 30nm and put it into 200ml of sensitizing solution, and perform ultrasonic sensitization treatment for 10 minutes. During the sensitization treatment, the frequency of ultrasonic waves is 35KHz, and the ultrasonic power is 100W; Wash the final WC powder until the lotion is colorless and transparent (about 10min). During ultrasonic cleaning, the ultrasonic frequency is 35KHz, and the ultrasonic power is 100W; then, under ultrasonic conditions, put the sensitized and cleaned WC powder into Activation treatment in 200ml activation solution for 10 minutes, ultrasonic activation, ultrasonic frequency 35KHz, ultrasonic power 100W; then under ultrasonic conditions, wash the activated WC powder with flowing distilled water until the washing liquid is colorless and transparent (about 10min ), during ultrasonic cleaning, the ultrasonic frequency is 35KHz, and the ultrasonic power is 100W; then put the activated and cleaned WC powder in...

Embodiment 2

[0039] Take 10g of WC powder with an average size of 100nm and put it into 300ml of sensitizing solution, and perform ultrasonic sensitization treatment for 10 minutes. During the sensitization treatment, the frequency of ultrasonic wave is 45KHz, and the ultrasonic power is 200W; Wash the final WC powder until the lotion is colorless and transparent (about 10min). During ultrasonic cleaning, the ultrasonic frequency is 45KHz, and the ultrasonic power is 200W; then, under ultrasonic conditions, put the sensitized and cleaned WC powder into Activation treatment in 300ml activation solution for 10min, ultrasonic activation, ultrasonic frequency 45KHz, ultrasonic power 200W; then under ultrasonic conditions, wash the activated WC powder with flowing distilled water until the lotion is colorless and transparent (about 10min ), during ultrasonic cleaning, the ultrasonic frequency is 45KHz, and the ultrasonic power is 200W; then put the activated and cleaned WC powder into 300ml of a...

Embodiment 3

[0041] Take 10g of WC powder with an average size of 100nm and put it into 400ml of sensitizing solution, and perform ultrasonic sensitization treatment for 10 minutes. During the sensitization treatment, the frequency of ultrasonic wave is 45KHz, and the ultrasonic power is 200W; Wash the final WC powder until the lotion is colorless and transparent (about 10min). During ultrasonic cleaning, the ultrasonic frequency is 45KHz, and the ultrasonic power is 200W; then, under ultrasonic conditions, put the sensitized and cleaned WC powder into Activation treatment in 300ml activation solution for 10min, ultrasonic activation, ultrasonic frequency 45KHz, ultrasonic power 200W; then under ultrasonic conditions, wash the activated WC powder with flowing distilled water until the lotion is colorless and transparent (about 10min ), during ultrasonic cleaning, the ultrasonic frequency is 45KHz, and the ultrasonic power is 200W; then put the activated and cleaned WC powder into 300ml of a...

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Abstract

The invention relates to a preparation method of nanometer WC-Co composite powder, which belongs to the technical field of preparation of a nanometer composite material. The preparation method is characterized in that nanometer WC powder of which the grain size is 30-200 nm is used as a raw material, the raw material of the nanometer WC powder can be subjected to low-temperature ultrasonic chemical plating by adding plating solution in the nanometer WC powder after the nanometer WC powder is sensitized, cleaned, activated, cleaned and dispersed by adding a dispersing agent under an ultrasound condition, the plating liquid for chemical plating is formed by 14-26 g / l of CoSO4.H2O, 100-150 g / l of KNaC4H4O6.4H2O, 18-40 g / l of NaH2PO2.H2O and 40-60 g / l of (NH4)2SO4, and pH (Potential Of Hydrogen) of the plating liquid is controlled to be 8-11 while plating is carried out. According to the preparation method disclosed by the invention, the problem that nanometer WC is easy to unite during a chemical plating process is solved, a uniform metallic cobalt clad layer is obtained on the surface of the nanometer WC, the technological process is simple, the cost is lower, the size of the prepared nanometer composite material is less than or equal to 260 nm, and the defect of the prepared nanometer composite material in application can be greatly improved.

Description

technical field [0001] The invention relates to a preparation method of nano WC-Co composite powder, which belongs to the technical field of preparation of nano composite materials. Background technique [0002] WC-Co cemented carbide is a brittle material, and the contradiction between its strength and toughness restricts its development. The study of nano-WC cemented carbide found that when the microstructure is reduced to the nanoscale, the properties of the alloy will change suddenly, which provides an effective way to solve the contradiction between the strength and toughness of cemented carbide. Nano WC-Co powder is a new functional material with high hardness, high thermal stability and high wear resistance. Because of its good mechanical properties, it has wide application prospects in the fields of tools, precision molds, drill bits and so on. With the continuous deepening of people's research on nanomaterials, the nanometerization of cemented carbide has caused a...

Claims

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Application Information

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IPC IPC(8): B22F1/02B22F9/16
Inventor 肖来荣宋宇峰郭蕾李荐蔡圳阳曾德露王彦红
Owner CENT SOUTH UNIV
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