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Rapid sintering detecting method for service performance of tungsten carbide powder

A technology of rapid sintering and tungsten carbide, which is applied in the direction of material analysis using radiation, material analysis using wave/particle radiation, and measuring devices, which can solve the problem of too much influence on the inspection results of the cemented carbide production process, affecting quality, and inspection cycle long wait question

Inactive Publication Date: 2010-01-27
南昌硬质合金有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the detection period is long, which leads to long storage time of tungsten carbide and affects the quality, especially for ultra-fine tungsten carbide.
Moreover, whether the cemented carbide production process is reasonable or not has a great influence on the test results, and the test method is not universal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The present invention is realized like this, it is characterized in that method step is:

[0018] (1) Ingredients: Cobalt powder, vanadium carbide powder, carbon black powder and paraffin powder are mixed according to the following mass ratio to form composite cobalt powder: 38:3:0.8:3;

[0019] (2) Wet grinding: the ball-to-material ratio in the ball mill is 10:1, and the weight ratio of alcohol to composite cobalt powder is 10:1;

[0020] (3) wax mixing: manual mixing of molten paraffin, the weight of paraffin accounts for 10% of the weight of the composite cobalt powder after wet grinding;

[0021] (4) sample preparation: the wax-doped composite cobalt powder that step (3) obtains is mixed at 40kN / cm 2 Press under pressure to form a briquette of 5.5×6.5×25.0, remove the molding agent in the dewaxing and sintering integrated furnace and carry out the final sintering of the sample. The process curve is: keep at 200°C for 2h, then heat up to 1340°C after 2h , keep war...

Embodiment 2

[0024] The present invention is realized like this, it is characterized in that method step is:

[0025] (1) Ingredients: Cobalt powder, vanadium carbide powder, carbon black powder and paraffin powder are mixed according to the following mass ratio to form composite cobalt powder: 42:5:1.2:5;

[0026] (2) Wet grinding: the ball-to-material ratio in the ball mill is 10:1, and the weight ratio of ethane to composite cobalt powder is 12:1;

[0027] (3) wax mixing: manual mixing of molten paraffin, the weight of paraffin accounts for 8% of the weight of the composite cobalt powder after wet grinding;

[0028] (4) sample preparation: the wax-doped composite cobalt powder that step (3) obtains is mixed at 20N / cm 2 Press under pressure to form a briquette of 6×7×25.5. The briquette is dewaxed and sintered in an integrated furnace to remove the molding agent and the final sintering of the sample is carried out. The process curve is: 400 ° C for 3 hours, and the temperature is raised...

Embodiment 3

[0031] The present invention is realized like this, it is characterized in that method step is:

[0032] (1) Ingredients: Cobalt powder, vanadium carbide powder, carbon black powder and paraffin powder are mixed according to the following mass ratio to form composite cobalt powder: 40:3~5:1:4;

[0033] (2) Wet grinding: the ball-to-material ratio in the ball mill is 10:1, and the weight ratio of acetone to composite cobalt powder is 11:1;

[0034] (3) wax mixing: manual mixing of molten paraffin, the weight of paraffin accounts for 9% of the weight of the composite cobalt powder after wet grinding;

[0035] (4) sample preparation: the wax-doped composite cobalt powder that step (3) obtains is mixed at 30kN / cm 2 Press under pressure to make a briquette of 5×6×24.5, remove the molding agent in the dewaxing and sintering integrated furnace and carry out the final sintering of the sample. ℃, keep warm for 5min, and cool to room temperature;

[0036] (5) Detection: make the meta...

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PUM

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Abstract

The invention relates to a rapid sintering detecting method for the service performance of tungsten carbide powder. The method is characterized by comprising the following steps: preparing materials, wet milling, doping paraffin, preparing sample and detecting. The invention has the following advantages: firstly, the method is rapid, accurate, objective, universal and complete; secondly, the change tendency of the tungsten carbide is reflected in the production process of hard alloy so as to detect the service performance of the tungsten carbide; thirdly, complete degree of carbonization and index of crystallization integrity are detected to reflect the change tendency and the service performance of the tungsten carbide in the production process of hard alloy.

Description

technical field [0001] The invention relates to a rapid sintering detection method, in particular to a rapid sintering detection method for the use performance of tungsten carbide powder. Background technique [0002] Tungsten carbide is one of the main raw materials for the production of cemented carbide, and its performance has a decisive influence on the quality of cemented carbide. The performance of tungsten carbide mainly includes four indicators: particle size distribution, carbonization completeness, particle morphology, and crystallization integrity. The more concentrated the particle size distribution, the higher the complete degree of carbonization, and the single crystal tungsten carbide with spherical particle shape is the ideal tungsten carbide. At present, there are usually five methods for testing the performance of tungsten carbide powder in the cemented carbide industry: SEM method (scanning electron microscope observation), particle size distribution inst...

Claims

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Application Information

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IPC IPC(8): G01N23/04G01N23/225G01N1/28
Inventor 占志泽吴爱华
Owner 南昌硬质合金有限责任公司
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