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Cemented carbide and its preparation method

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

Active Publication Date: 2022-06-21
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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  • Cemented carbide and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Step 1: supply carbon and tungsten trioxide to a ball mill for wet ball milling (the mass 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 100 g of tungsten trioxide and carbon, the input amount of ethanol is 80 mL), and the ratio of ball to material is 10:1. After the ball milling, the material is vacuum dried, the drying temperature is 80°C, and the drying time is 3h, and the tungsten trioxide-carbon composite powder is obtained after drying;

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

Embodiment 2

[0062] Step 1: supply carbon and tungsten trioxide to a ball mill for wet ball milling (the mass 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 100 g of tungsten trioxide and carbon, the input amount of ethanol is 100 mL), and the ratio of ball to material is 10:1. After the ball milling, the material is vacuum dried, the drying temperature is 80°C, and the drying time is 3h, and the tungsten trioxide-carbon composite powder is obtained after drying;

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

Embodiment 3

[0067] Step 1: supply carbon and tungsten trioxide to a ball mill for wet ball milling (the mass 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 100 g of tungsten trioxide and carbon, the input amount of acetone is 60 mL), and the ratio of ball to material is 8:1. After the ball milling, the material is vacuum-dried, the drying temperature is 60°C, and the drying time is 9h, and the tungsten trioxide-carbon composite powder is obtained after drying;

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

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Abstract

The invention discloses a hard alloy and a preparation method thereof, wherein the method comprises: mixing tungsten trioxide and carbon for ball milling to obtain tungsten trioxide-carbon composite powder; tungsten trioxide-carbon composite powder, carbonization The tungsten powder, cobalt powder, forming agent and surfactant are mixed for wet ball milling and drying to obtain a sintered precursor; the sintered precursor is pressed and formed for the first sintering, and then cooled; the obtained first sintered material is subjected to the second Sintered and then cooled in order to obtain cemented carbide. Using this method to prepare cemented carbide can obtain tungsten carbide with large grain size, complete development and uniform distribution, which greatly reduces production costs and has good application prospects. The cost of tungsten carbide is high, the price of the prepared cemented carbide is high, and the grains are uneven.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and particularly 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, construction machinery and transportation. The quality and stability of the instrument 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 lead to the fragmentation and particle size reduction of the tungsten carbide powder, which makes it difficu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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