A kind of tungsten steel ceramic hard alloy and preparation method thereof

A technology of ceramic cemented carbide and tungsten steel, applied in the field of cemented carbide, can solve the problems of high equipment and mold requirements, cumbersome degumming process, high degumming waste rate, etc., and achieve excellent thermal deformation resistance, high hardness, and inhibit crystallization The effect of grain growth

Active Publication Date: 2022-05-20
HEYUAN YONGXING CEMENTED CARBIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the shape of the product is limited, and only simple-shaped products can be prepared, and this process is only suitable for single-piece or small-batch production, with low productivity and high cost
As a near-net forming process, injection molding has been widely used in the preparation of small-sized and complex-shaped cemented carbide parts. However, injection molding technology has many shortcomings, such as cumbersome degumming process, high degumming rejection rate, and low product strength. And it has high requirements for equipment and molds. It turns out that injection molding can only produce small-sized parts

Method used

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  • A kind of tungsten steel ceramic hard alloy and preparation method thereof
  • A kind of tungsten steel ceramic hard alloy and preparation method thereof
  • A kind of tungsten steel ceramic hard alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0053] The preparation method of Fe-Si-Al oxide nanopowder is as follows:

[0054] (1) Porous SiO 2 / Al 2 o 3 Preparation of hollow nanospheres: Dissolve 2g of γ-aminopropyltrimethoxysilane and 10g of aluminum isopropoxide in 50mL of ethyl acetate as the oil phase; prepare oxyethylene-oxypropylene triblock copolymer PEO106-PPO70- The content of PEO106 is 1wt%; the content of sodium dodecylbenzenesulfonate is 2wt% aqueous solution, which is the water phase; add 50mL oil phase to 100mL water phase, emulsify at 10000r / min for 3min, and adjust the pH of the solution to 8. React for 7h, centrifuge at 3000r / min for 15min, wash the solid with deionized water, dry at 70°C for 5h, and calcinate at 400°C for 2h to obtain porous SiO 2 / Al 2 o 3 Hollow nanospheres; figure 1 For the prepared porous SiO 2 / Al 2 o 3 The SEM picture of the hollow nano-microspheres shows that the particle size of the prepared microspheres is within 100nm, and a large number of pores are formed on the ...

preparation example 2

[0057] The preparation method of Fe-Si-Al oxide nanopowder is as follows:

[0058] (1) Porous SiO 2 / Al 2 o 3 Preparation of hollow nanospheres: Dissolve 5g of N-β(aminoethyl)-γ-aminopropylmethyldiethoxysilane and 10g of aluminum isopropoxide in 50mL of ethyl acetate as the oil phase; prepare ethylene oxide The content of -oxypropylene triblock copolymer PEO20-PPO70-PEO20 is 2wt%; the content of sodium hexadecylbenzenesulfonate is 4wt% aqueous solution, which is the water phase; 50mL oil phase is added to 100mL water phase, 15000r Emulsify for 5 minutes at a speed of 1 / min, adjust the pH of the solution to 9, react for 12 hours, centrifuge at 3000r / min for 15 minutes, wash the solid with deionized water, dry at 70°C for 5 hours, and calcinate at 500°C for 4 hours to obtain porous SiO 2 / Al 2 o 3 Hollow nanospheres;

[0059] (2) Preparation of Fe-Si-Al oxide nanopowder: Dissolve 2 g of ferric nitrate in 100 mL of water, add 8 g of citric acid and 5 g of porous SiO prepare...

preparation example 3

[0061] The preparation method of Fe-Si-Al oxide nanopowder is as follows:

[0062] (1) Porous SiO 2 / Al 2 o 3 Preparation of hollow nanospheres: Dissolve 3.5g of N-β(aminoethyl)-γ-aminopropylmethyldimethoxysilane and 10g of aluminum isopropoxide in 50mL of ethyl acetate to form the oil phase; The content of hexaalkyltrimethylammonium bromide is 1.5wt%; the content of sodium octadecylsulfonate is 3wt% aqueous solution, which is the water phase; 50mL of oil phase is added to 100mL of water phase, under the speed of 12500r / min Emulsify for 4 minutes, adjust the pH value of the solution to 8.5, react for 10 hours, centrifuge at 3000r / min for 15 minutes, wash the solid with deionized water, dry at 70°C for 5 hours, and calcinate at 450°C for 3 hours to obtain porous SiO 2 / Al 2 o 3 Hollow nanospheres;

[0063] (2) Preparation of Fe-Si-Al oxide nanopowder: Dissolve 2 g of ferric nitrate in 100 mL of water, add 6 g of citric acid and 4 g of porous SiO prepared in step (1) 2 / A...

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Abstract

The invention provides a tungsten steel ceramic hard alloy and a preparation method thereof, belonging to the technical field of hard alloys. Including: S1. get WC powder, Ni powder and Fe-Si-Al oxide nanopowder and inhibitor and mix uniformly in 97# gasoline to obtain the mixture; S2. add 97# gasoline to the mixture and carry out ball milling, and sieve to obtain Mix the slurry; S3. add carboxymethyl cellulose to the mixed slurry as a forming agent, perform ball milling, and dry to obtain a powder; 4. Put the powder into a mold for extrusion, and dry to obtain a green body; S5. The green body is subjected to discharge plasma sintering, cooled out of the furnace, and sandblasted to obtain tungsten steel ceramic cemented carbide. The tungsten steel ceramic cemented carbide prepared by the present invention has good corrosion resistance, heat resistance and high temperature oxidation resistance, excellent wear resistance, good toughness, strength and bending resistance, high hardness, high density, microstructure Small and uniform, it has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of hard alloys, in particular to a tungsten steel ceramic hard alloy and a preparation method thereof. Background technique [0002] Cemented carbide is an alloy material that is formed by tungsten carbide, titanium carbide or both to form a double carbide as the hard phase, cobalt as the binder phase, and sintered by high-temperature liquid phase through powder metallurgy process. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500°C , It still has high hardness at 1000 °C. [0003] my country's tungsten resources account for more than 65% of the world's tungsten resources, of which Ganzhou, Jiangxi Province is known as the "Tungsten Capital". The development of my country's tungsten ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C29/08B22F3/105
Inventor 张承熙
Owner HEYUAN YONGXING CEMENTED CARBIDE
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