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Low-density anti-corrosion hard alloy material and preparation method thereof

A cemented carbide and low-density technology, applied in the field of cemented carbide, can solve the problems of increased material, installation cost, large proportion of cemented carbide, wear and other problems, and achieve high-efficiency preparation, high precision of composition control, and improved temperature concentration Effect

Active Publication Date: 2018-04-13
株洲思瑞普硬质合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mass percentage of hard phases such as tungsten carbide is about 89% to 97%, resulting in a large proportion of cemented carbide, which increases a lot of materials and installation costs when applied to large construction machinery parts, and high specific gravity is easy to cause additional wear

Method used

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  • Low-density anti-corrosion hard alloy material and preparation method thereof

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preparation example Construction

[0022] A kind of preparation method of low-density wear-resistant cemented carbide material of the present invention, comprises the following steps:

[0023] (1) Weigh 89.1%-91.6% of tungsten carbide powder by mass percentage: 8.2%-11.3% of cobalt powder: 0.2%-0.4% of calcium carbonate powder, mix the powder with a three-dimensional eddy current mixer, and the rotor speed is 70 rpm, Mix for 40 minutes, put the powder into a cold press to form a cylindrical green body after mixing evenly, the cold press pressure is 200MPa, and hold the pressure for 3 minutes;

[0024] (2) Put the prefabricated body and the nickel-based high-temperature solder into the high-temperature conductive mold according to the mass ratio of 82.4% to 83.2%: 16.8% to 17.6%. The composition of the nickel-based high-temperature solder is 86Ni 5Cr 2Si 4B 3Fe, which is conductive at high temperature The mold consists of three parts: high-temperature steel indenter, graphite sleeve and plaster mold. It is fired...

Embodiment 1

[0027] (1) Weigh tungsten carbide powder 89.8% by mass percentage: cobalt powder 10%: calcium carbonate powder 0.2%, mix the powder with a three-dimensional vortex mixer, the rotor speed is 70 rpm, mix for 40 minutes, and load the powder after mixing evenly Enter the cold press to make a cylindrical green body, the cold pressing pressure is 200MPa, and the pressure is maintained for 3 minutes;

[0028] (2) Put the prefabricated body and the nickel-based high-temperature solder into the high-temperature conductive mold according to the mass ratio of 82.9%:17.1%, the composition of the nickel-based high-temperature solder is 86Ni 5Cr 2Si 4B 3Fe, and the high-temperature conductive mold includes a high-temperature steel pressure head It is composed of three parts, graphite sleeve and plaster mold, which are fired into low-density cemented carbide materials in a biaxial high-pressure infiltration device. The firing process is: biaxial pressure 4.2GPa, temperature 1150°C, and heat p...

Embodiment 2

[0030] (1) Weigh tungsten carbide powder 91.2% by mass percentage: cobalt powder 8.4%: calcium carbonate powder 0.4%, mix the powder with a three-dimensional vortex mixer, the rotor speed is 70 rpm, mix for 40 minutes, and load the powder after mixing evenly Enter the cold press to make a cylindrical green body, the cold pressing pressure is 200MPa, and the pressure is maintained for 3 minutes;

[0031] (2) Put the prefabricated body and the nickel-based high-temperature solder into the high-temperature conductive mold according to the mass ratio of 82.5%:17.5%, the composition of the nickel-based high-temperature solder is 86Ni 5Cr 2Si 4B 3Fe, and the high-temperature conductive mold includes a high-temperature steel pressure head Composed of three parts, graphite sleeve and plaster mold, low-density cemented carbide materials are fired in a biaxial high-pressure infiltration device. The firing process is: biaxial pressure 4.5GPa, temperature 1180 ° C, and heat preservation fo...

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Abstract

The invention discloses a low-density anti-corrosion hard alloy material and a preparation method thereof. Tungsten carbide powder, cobalt powder and calcium carbonate powder are weighed according tomass percent and are put in a cold pressing machine to be made into cylindrical green bodies after being evenly mixed in a three-dimensional vortex material mixing machine; and the premade green bodies and nickel-based high-temperature brazing filler metal are put into a high-temperature electric conduction mould according to the mass ratio and are fired into the low-density anti-corrosion hard alloy material in a double-shaft high-pressure infiltration device.

Description

technical field [0001] The invention relates to hard alloy technology, in particular to a low-density, corrosion-resistant hard alloy material and a preparation method thereof. Background technique [0002] The superior wear resistance of cemented carbide materials has continuously expanded its application fields, and has expanded from the original cutting tools, molds, and punches to the manufacture of bearings, ball valves, and flanges. [0003] Traditional cemented carbide is mainly composed of hard phases such as tungsten carbide, titanium carbide, and titanium nitride, and metal binder phases such as cobalt, nickel, and iron, which are fired at high temperature. The mass percentage of hard phases such as tungsten carbide is about 89% to 97%, resulting in a large proportion of cemented carbide, which increases a lot of materials and installation costs when applied to large construction machinery parts, and high specific gravity is easy to cause additional wear. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05
CPCC22C1/051C22C29/067C22C29/08
Inventor 董洪峰艾桃桃李文虎王玉梅
Owner 株洲思瑞普硬质合金股份有限公司
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