Double crystal corrosion resistant cemented carbide material and manufacturing method thereof

A hard alloy, corrosion-resistant technology, applied in the manufacture of hard alloy materials, the field of double-crystal corrosion-resistant hard alloy materials, can solve the problem of WC grain growth, corrosion and cracks, and hard alloys that cannot adapt Work environment and other issues, to achieve the effect of stable quality, simple and reliable manufacturing method

Inactive Publication Date: 2009-03-11
ZHUZHOU LIZHOU CEMENTED CARBIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the main grades of cemented carbide plates are YG15, YG20, etc. In the production process of these grades, WC powder of a single specification is used for production. The disadvantage of a single powder is that it cannot make the material have the characteristics of high strength and high hardness at the same time. That is to say, the product cannot have the characteristics of wear resistance and impact resistance at the same time; while the bonding component is only one element of cobalt,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] It is composed of WC composite hard phase as the main component, Co as the bonding metal, and Cr as the trace element for corrosion resistance and grain growth prevention. The mass percentage of each component is:

[0016] 0.8-1.2u WC: 20%,

[0017] 2.0-2.2u WC: 60%,

[0018] Cr3C2: 0.8%,

[0019] Co: 19.2%.

[0020] The above powder is ball milled according to the proportion, and then the obtained mixture is pressed into a blank for vacuum or pressure sintering. The sintering problem is 1380 ° C, and the heat preservation is 80 minutes, that is, the twin crystal corrosion-resistant cemented carbide material of the present invention is obtained.

Embodiment 2

[0022] It is composed of WC composite hard phase as the main component, Co as the bonding metal, and Cr as the trace element for corrosion resistance and grain growth prevention. The mass percentage of each component is:

[0023] 1.8-2.0u WC: 26%,

[0024] 2.8-3.2u WC: 58%,

[0025] Cr3C2: 0.5%,

[0026] Co: 15.5%.

[0027] The above powder is ball milled according to the proportion, and then the obtained mixture is pressed into a blank for vacuum or pressure sintering. The sintering problem is 1420°C, and the temperature is kept for 40 minutes to obtain the twin crystal corrosion-resistant cemented carbide material of the present invention.

Embodiment 3

[0029] It is composed of WC composite hard phase as the main component, Co as the bonding metal, and Cr as the trace element for corrosion resistance and grain growth prevention. The mass percentage of each component is:

[0030] 0.8-1.2u WC: 32%,

[0031] 3.0-4.0u WC: 48%,

[0032] Cr3C2: 1.0%,

[0033] Co: 19.0%.

[0034] The above-mentioned powders are ball milled according to the proportion, and then the obtained mixture is pressed into a blank for vacuum or pressure sintering. The sintering problem is 1400°C, and the temperature is kept for 60 minutes to obtain the twin-crystal corrosion-resistant cemented carbide material of the present invention.

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PUM

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Abstract

The invention discloses a twinned crystal corrosion-resistant hard alloy material and a method for manufacturing the same. The main compositions of the alloy material are WC composite hard phase, Co as binder metal, Cr as the microelement to resist corrosion and prevent the growth of grain, and the mass percentage compositions are: 20 to 32 percent of 0.8-2u of tungsten carbide powder, 48 to 60 percent of 2-4u tungsten carbide powder, 0.5 to 1 percent of chrome carbide powder, and 12 to 20 percent of cobalt powder. The manufacturing method comprises the steps of ball milling the powder at the matching ratios in alcohol and hexane protection mediums to obtain hard allay mixing material, then pressing the powder into be blanks, and finally sintering the blanks in a sintering furnace under the conditions at a temperature of between 1380 and 1420 DEG C for heat preservation for 40 to 80 minutes. The twinned crystal corrosion-resistant hard alloy material has wear-resistance, impact-resistance and stable quality, and the manufacturing method is simple and reliable.

Description

technical field [0001] The invention relates to a hard alloy material, in particular to a twin-crystal corrosion-resistant hard alloy material, and also relates to a manufacturing method of the twin-crystal corrosion-resistant hard alloy material. Background technique [0002] At present, the main grades of cemented carbide plates are YG15, YG20, etc. In the production process of these grades, WC powder of a single specification is used for production. The disadvantage of a single powder is that it cannot make the material have the characteristics of high strength and high hardness at the same time. That is to say, the product cannot have the characteristics of wear resistance and impact resistance at the same time; while the bonding component is only one element of cobalt, but the oxidation resistance and corrosion resistance of cobalt are poor, which makes the plate prone to corrosion in wire cutting and EDM And defects such as cracks; at the same time, at high temperature...

Claims

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Application Information

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IPC IPC(8): C22C29/06C22C1/05
Inventor 魏鹏飞
Owner ZHUZHOU LIZHOU CEMENTED CARBIDE
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