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Hard alloy and preparation method thereof

A cemented carbide, high-quality technology, applied in the field of powder metallurgy, can solve the problems of high cost of nano-tungsten carbide, uneven grain, high price of cemented carbide, etc.

Active Publication Date: 2021-06-11
CHONGYI ZHANGYUAN TUNGSTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, an object of the present invention is to propose a kind of cemented carbide and preparation method thereof, adopt this method to prepare cemented carbide, can obtain the cemented carbide grain size of tungsten carbide grain size is bigger, well-developed and evenly distributed cemented carbide, greatly It reduces the production cost, has a good application prospect, and solves the problems of high cost of nano-tungsten carbide, high price of prepared cemented carbide, and uneven grains in the existing nano-activation method

Method used

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  • Hard alloy and preparation method thereof
  • Hard alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Step 1: supply carbon and tungsten trioxide to the ball mill for wet ball milling (the quality of carbon accounts for 10% of the total mass of tungsten trioxide and carbon), the ball milling speed is 350r / min, the ball milling time is 25h, and the ball milling medium is ethanol ( Based on the material composed of 100g tungsten trioxide and carbon, the input amount of ethanol is 80mL), and the ball-to-material ratio is 10:1. After the ball milling, the material was vacuum-dried, the drying temperature was 80°C, and the drying time was 3 hours. After the drying, tungsten trioxide-carbon composite powder was obtained;

[0058] Step 2: Supply tungsten trioxide-carbon composite powder, tungsten carbide powder, cobalt powder, paraffin and oleic acid to the ball mill for wet ball milling (the mass of tungsten trioxide-carbon composite powder accounts for tungsten trioxide-carbon composite powder and carbonization 2% of the total mass of tungsten powder; the mass ratio of tungs...

Embodiment 2

[0062] Step 1: supply carbon and tungsten trioxide to the ball mill for wet ball milling (the quality of carbon accounts for 10% of the total mass of tungsten trioxide and carbon), the ball milling speed is 400r / min, the ball milling time is 20h, and the ball milling medium is ethanol ( Based on the material composed of 100g tungsten trioxide and carbon, the input amount of ethanol is 100mL), and the ball-to-material ratio is 10:1. After the ball milling, the material was vacuum-dried, the drying temperature was 80°C, and the drying time was 3 hours. After the drying, tungsten trioxide-carbon composite powder was obtained;

[0063] Step 2: Supply tungsten trioxide-carbon composite powder, tungsten carbide powder, cobalt powder, paraffin and oleic acid to the ball mill for wet ball milling (the mass of tungsten trioxide-carbon composite powder accounts for tungsten trioxide-carbon composite powder and carbonization 5% of the total mass of tungsten powder; the mass ratio of tung...

Embodiment 3

[0067] Step 1: supply carbon and tungsten trioxide to the ball mill for wet ball milling (the quality of carbon accounts for 20% of the total mass of tungsten trioxide and carbon), the ball milling speed is 450r / min, the ball milling time is 15h, and the ball milling medium is acetone ( Based on the material composed of 100g of tungsten trioxide and carbon, the input amount of acetone is 60mL), and the ratio of ball to material is 8:1. After the ball milling, the material was vacuum-dried, the drying temperature was 60°C, and the drying time was 9 hours. After the drying, tungsten trioxide-carbon composite powder was obtained;

[0068] Step 2: supply tungsten trioxide-carbon composite powder, tungsten carbide powder, cobalt powder, polyethylene glycol and dodecanoic acid to the ball mill for wet ball milling (the mass of tungsten trioxide-carbon composite powder accounts for tungsten trioxide-carbon composite powder 10% of the total mass of tungsten carbide powder and tungsten...

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Abstract

The invention discloses hard alloy and a preparation method thereof. The method comprises the steps that tungsten trioxide and carbon are mixed and subjected to ball milling so as to obtain tungsten trioxide-carbon composite powder; the tungsten trioxide-carbon composite powder, tungsten carbide powder, cobalt powder, a forming agent and a surfactant are mixed and subjected to wet ball milling and drying to obtain a sintering precursor; after being subjected to compression molding, the sintering precursor is subjected to first sintering and then is cooled; and the obtained first sintered material is subjected to second sintering and then cooled so as to obtain the hard alloy. By adopting the method for preparing the hard alloy, the hard alloy of which tungsten carbide grains are large in size and are completely developed and uniformly distributed can be obtained, the production cost is greatly reduced, the good application prospect is achieved, and the problems that in an existing nanometer activation method, nanometer tungsten carbide is high in cost, and prepared hard alloy is high in price and uneven in grain distribution are solved.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a cemented carbide and a preparation method thereof. Background technique [0002] Cemented carbide is a composite material composed of a hard phase and a binder phase. Because of its high hardness, good toughness, and wear resistance, it is widely used in aerospace, engineering machinery, and transportation. The quality and stability of the machine directly affect the processing and manufacturing of precision instruments. Among them, ultra-coarse-grained cemented carbide has excellent wear resistance, impact resistance, thermal fatigue resistance and other characteristics and is widely used in steel rolling, die stamping, rock drilling and other working conditions. [0003] The ball milling process in the traditional powder metallurgy process will cause the tungsten carbide powder particle breakage and particle size reduction, which makes it difficult to p...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C29/08
CPCC22C1/055C22C29/08C22C29/067
Inventor 唐彦渊羊求民钟志强陈邦明徐国钻王红云傅雨
Owner CHONGYI ZHANGYUAN TUNGSTEN
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