Manufacturing method of multifunctional drill hard alloy

A cemented carbide and manufacturing method technology, applied in the field of cemented carbide, can solve the problems of coarse grains, low mixing efficiency, and elimination difficulties in the final product, so as to improve the consistency of powder shape, increase powder energy, and reduce defects Effect

Inactive Publication Date: 2012-08-29
湖南奇力工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional cemented carbide manufacturing methods have difficulties in eliminating powder defects, uneven mixing, low mixing efficiency, and coarse grains in the final product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of manufacture method of multifunctional drill bit cemented carbide, it operates according to the following steps:

[0024] (1) Add 1200g of tungsten carbide powder with an average particle size of 2.0μm into the jet mill, and pass through the N of the high-pressure jet mill. 2 The air pressure is 2MPa, and the crushing time is 0.4 hours for 2 times, and the powder classification treatment is completed at the same time, and the hard phase powder with a particle size range of 0.4-2.0 μm is made;

[0025] (2) Add the hard phase powder in the step (1) in the stirring ball mill, then add 60g of cobalt powder with an average particle size of 1.2 μm, 2g of titanium carbide powder, 0.24g of oleic acid, 24g of polyethylene glycol, and 400g of ethanol as Grinding medium, stirring speed 500r / min, filling factor 0.65, grinding diameter D4, mass of grinding ball is 7200g, stirring and grinding, grinding for 2.0 hours to form a slurry, then filtering, drying at 50°C to 250°C,...

Embodiment 2

[0029] A kind of manufacture method of multifunctional drill bit cemented carbide, it operates according to the following steps:

[0030] (1) Add 1200g of molybdenum nitride powder with an average particle size of 25 μm into the jet mill, and pass through the high-pressure jet mill, the gas is N 2 The mixed gas with air, the air pressure is 0.6MPa, and the crushing time is 0.5 hours, and the particle size classification treatment is completed at the same time, and the hard phase powder with a particle size range of 5-25 μm is made;

[0031] (2) Add the hard phase powder in the step (1) in the stirring ball mill, then add 12g of iron powder with an average particle size of 1.2 μm, 60g of vanadium carbide powder, 24g of oleic acid, 12g of polyethylene glycol, and 300g of hexane as Grinding medium, the stirring speed is 70r / min, the filling factor is 0.65, the grinding diameter is D4, and the weight of the grinding ball is 3600g. Stir and grind, grind for 0.5 hours to form a slur...

Embodiment 3

[0035] A kind of manufacture method of multifunctional drill bit cemented carbide, it operates according to the following steps:

[0036] (1) 1200g of niobium powder with an average particle size of 0.8 μm is added to the jet mill, and the air pressure of the high-pressure jet mill is 3MPa, and the pulverization is carried out twice. 0.4~0.8μm hard phase powder;

[0037] (2) Add the hard phase powder in step (1) to the stirring ball mill, then add 150g cobalt powder with an average particle size of 1.2 μm and 150g nickel powder with an average particle size of 1.2 μm, 20g chromium carbide powder, 1g stearic acid, 50g Paraffin wax, 400g heptane as the grinding medium, the stirring speed is 500r / min, the filling factor is 0.65, the grinding diameter is D4, and the weight of the grinding ball is 5000g. Stir and grind, grind for 2.0 hours to form a slurry, and then filter it under the condition of 150°C Drying and sieving, the mesh number of the sieve is 120 mesh, made of multifu...

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PUM

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Abstract

The invention discloses a manufacturing method of multifunctional drill hard alloy, which comprises the following steps of: placing hard-phase powder into an airflow pulverizer to be pulverized, then placing the pulverized material into a blending ball mill to be blended and ground to form slurry, filtering, drying and screening the slurry be pressed, squeezed and molded to form the multifunctional drill hard alloy. Through a high-energy breaking and airflow grading method, the hard-alloy powder with inherent defect is broken with brute force and then is shaped so as to give high energy to the surface of the hard phase, to reduce the defect of the hard-phase powder and to improve the powder energy; and through high-speed and high-efficient mixing and shaping, components are more uniformly mixed, and the consistence of the powder appearance can be improved, so that the alloy tissue crystal granularity is uniform in size, the consistence of the grain shape is good, no refined particle and oversized particle exist, the granularity is centralized, and no internal defect exists; and finally the performance of the multifunctional drill hard alloy material can be improved.

Description

technical field [0001] The invention relates to hard alloys, in particular to a method for manufacturing multifunctional drill bit hard alloys. Background technique [0002] Multifunctional drill bit cemented carbide is a powder metallurgy product made of high-hardness refractory metal carbide micron-sized powder as the main component, cobalt or nickel, molybdenum as the binder, and sintered in a vacuum furnace or a hydrogen reduction furnace. Cemented carbide for multifunctional drills is a material with high hardness, high strength and high wear resistance. It has been widely used in modern industry. The key process for the manufacture of cemented carbide materials for multifunctional drills is the production of cemented carbide mixtures. manufacture. Traditional cemented carbide manufacturing methods have difficulties in eliminating powder defects, uneven mixing, low mixing efficiency, and coarse grains in the final product. Contents of the invention [0003] The tech...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C29/00
Inventor 林国华
Owner 湖南奇力工具有限公司
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