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Hard alloy and preparation method thereof

A technology of cemented carbide and raw materials, which is applied in the field of cemented carbide and its preparation, can solve problems such as the great difference in the properties of cemented carbide, and achieve the effects of improving quality, improving production efficiency, and saving production costs

Inactive Publication Date: 2013-03-13
赣州世瑞钨业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the particle size factor of tungsten carbide and cobalt powder, and the ratio of tungsten carbide and cobalt powder, the performance of sintered cemented carbide is also very different.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 600 grams of cobalt powder with a particle size of 0.5 μm, 30 grams of vanadium carbide with a particle size of 0.5 μm, 80 grams of chromium carbide with a particle size of 0.5 μm, and 100 grams of tantalum carbide with a particle size of 0.5 μm according to the percentage by weight of raw materials. gram, 2 grams of rhenium powder with a particle size of 0.5 μm, and 9188 grams of iron powder with a particle size of 0.5 μm, and then fully mixed in an alcohol medium; the mixture was wet ball milled in a ball mill for 8 hours, and the speed was controlled at 110 rpm , after ball milling, transfer the wet mixture into a double-cone mixer and mix for 1 hour, recover alcohol, and then dry for 2 hours; pressurize and keep for 30 minutes, and the pressure is controlled at 300Mpa; in the time of 3 hours Add 300 grams of paraffin wax setting agent during continuous stirring; sinter after stirring, remove wax at 500°C for 5 hours during sintering, then heat up at 1350°C for ...

Embodiment 2

[0028] Weigh 800 grams of cobalt powder with a particle size of 0.5 μm, 50 grams of vanadium carbide with a particle size of 0.5 μm, 50 grams of chromium carbide with a particle size of 0.5 μm, and 100 grams of tantalum carbide with a particle size of 0.5 μm according to the percentage by weight of raw materials. gram, 2 grams of rhenium powder with a particle size of 0.5 μm, and 9178 grams of iron powder with a particle size of 0.5 μm, and then fully mixed in an alcohol medium; the mixture was wet ball milled in a ball mill for 8 hours, and the speed was controlled at 110 rpm , after ball milling, transfer the wet mixture into a double-cone mixer and mix for 1 hour, recover alcohol, and then dry for 2 hours; pressurize and keep for 30 minutes, and the pressure is controlled at 300Mpa; in the time of 3 hours Add 300 grams of paraffin wax setting agent during continuous stirring; sinter after stirring, remove wax at 500°C for 5 hours during sintering, then heat up at 1350°C for ...

Embodiment 3

[0030] Weigh 600 grams of cobalt powder with a particle size of 0.8 μm, 20 grams of vanadium carbide with a particle size of 0.8 μm, 300 grams of chromium carbide with a particle size of 0.5 μm, and iron powder 8850 with a particle size of 0.8 μm according to the percentage by weight of raw materials. gram, and then fully mixed under the alcohol medium; the mixture was wet-milled in a ball mill for 10 hours, and the speed was controlled at 110 rpm. After the ball milling, the wet mixture was transferred to a double-cone mixer and mixed for 1 hour to recover alcohol , and then dried for 2 hours; cold and other parties pressurized and kept for 30 minutes, and the pressure was controlled at 300Mpa; 300 grams of paraffin wax setting agent were added in the uninterrupted stirring in the time of 3 hours; sintering was carried out after stirring. Remove wax at 500°C for 5 hours, then heat up at 1350°C for 2-3 hours, then heat up at 1400°C for 80 minutes, then sinter at 1400°C for 80 m...

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PUM

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Abstract

The invention provides a hard alloy and a preparation method thereof. The method comprises the steps of weighing raw materials including cobalt powder, vanadium carbide, chromium carbide, tantalum carbide, titanium carbide, rhenium powder, nickel powder and iron powder in percentage by weight and then sufficiently mixing the raw materials in the presence of an alcohol medium; ball-milling a mixture in a ball mill for 4-24 hours in a wet way, transferring a wet mixture into a double cone mixer to be mixed for 1-2 hours, recycling the alcohol and then drying; pressurizing in a cold isotropic way, and adding a paraffin wax setting agent during continuous stirring within a time of three hours; and sintering after stirring and cooling to obtain the hard alloy. By using the invention, the quality of the hard alloy is effectively improved, the production cost is effectively saved and the production efficiency is improved.

Description

technical field [0001] The invention relates to the production of cemented carbide, in particular to a cemented carbide and a preparation method thereof. Background technique [0002] 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 industry mainly started in the 1930s, and the development of tungsten processing technology has made great achievements. Due to the late start of China's industry, China is among the most advanced in the world in the primary processing and smelting of tungsten, but there is still a certain gap with foreign countries in the technology of cemented carbide products. In the production technology of cemented carbide, tungsten carbide and cobalt powder are mainly used as raw materials, and they are formed in the form of mixing glue or wax. High temperature sintering is carried out above 1200°C. D...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C38/30C22C38/52
Inventor 肖民李重义陈风雷殷宏华
Owner 赣州世瑞钨业股份有限公司