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Processing method of hard alloy material

A technology of cemented carbide and processing method, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as insufficient hardness and strength, achieve high hardness and strength, and improve mechanical activity.

Inactive Publication Date: 2016-12-07
柳州增程材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation of WC-Co alloy can adopt lamination method, sintering and other processes. The WC grains of WC-Co cemented carbide prepared by these processes are continuously distributed, and the alloy with Co phase gradient has a fine grain side with Higher hardness, the coarse-grain side has a certain bending strength; during sintering, the Co phase migrates from the coarse-grain side to the fine-grain side, and its hardness and strength are not enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Wash 95wt% WC grains and 5wt% Co grains separately to remove surface impurities; grind the cleaned WC grains and Co grains into powders; then mix the above powders in a mixer evenly and grind them to obtain alloy powder; place the alloy powder in a graphite mold, first sinter at 280°C for 30s, then sinter at 500°C for 60s, and then sinter at 650°C for 30s; then solid solution treatment at 650°C for 12min; then cold pressing deformation treatment , the cold compression deformation is 30%; finally, aging treatment at 300°C for 3 hours to obtain WC-Co cemented carbide material; then cemented carbide and distilled water are mixed, and the mass ratio of cemented carbide and distilled water is 2.5:1, and Add 2% metal granulation agent of cemented carbide quality and stir evenly to prepare metal powder slurry; then granulate the slurry through a centrifugal spray granulator, where the inlet temperature of the dry air of the spray granulator is 250°C, The outlet temperature is ...

Embodiment 2

[0030] Wash 92wt% WC grains and 8wt% Co grains separately to remove surface impurities; grind the cleaned WC grains and Co grains into powders respectively; then mix the above powders in a mixer and grind them to obtain alloy powder; place the alloy powder in a graphite mold, first sinter at 300°C for 25s, then sinter at 560°C for 50s, and then sinter at 680°C for 25s; then solid solution treatment at 680°C for 11 minutes; then cold pressing deformation treatment , the cold deformation is 32%; finally, aging treatment at 330°C for 2.5h, to obtain WC-Co cemented carbide material; then the cemented carbide and deionized water are mixed, and the mass ratio of cemented carbide and deionized water is 2.8:1, and add 3% metal granulating agent of cemented carbide quality and stir evenly to prepare metal powder slurry; then granulate the slurry through a centrifugal spray granulator, wherein the rotational speed of the centrifugal spray granulator is 6000 rpm, the inlet temperature of...

Embodiment 3

[0032] Wash 90wt% WC grains and 10wt% Co grains separately to remove surface impurities; grind the cleaned WC grains and Co grains into powders; then mix the above powders in a mixer and grind them to obtain alloy powder; place the alloy powder in a graphite mold, first sinter at 320°C for 20s, then sinter at 600°C for 40s, and then sinter at 700°C for 20s; then solid solution treatment at 700°C for 10 minutes; then cold pressing deformation treatment , the cold deformation is 35%; finally, aging treatment at 350°C for 2h, to obtain WC-Co cemented carbide material, then mix cemented carbide with deionized water, and the mass ratio of cemented carbide to deionized water is 3 : 1, and add 4% metal granulating agent of cemented carbide quality and stir evenly to prepare metal powder slurry; then granulate the slurry through a centrifugal spray granulator, wherein the rotating speed of the centrifugal spray granulator is 8000 rpm, the inlet temperature of the dry air of the spray ...

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Abstract

The invention relates to a processing method of a hard alloy material. The processing method comprises the following steps: cleaning 95wt% of WC particles and 5wt% of Co particles respectively, and removing impurities on surfaces; crushing the cleaned WC particles and Co particles into silts respectively; then uniformly mixing the silts in a mixer, and grinding to obtain alloy powder; putting the alloy powder in a graphite die, and carrying out hot pressed sintering to obtain hard alloy; then carrying out heat treatment on the hard alloy; mixing the hard alloy after heat treatment and liquid to prepare metal powder slurry; and then treating the slurry by a sponging granulator to prepare powder. According to the processing method, as the impurities on the surfaces of the metal powder can be removed by a cleaning process, the purity of subsequently prepared alloy is improved; then the mechanical activity of the powder can be improved through a mode of material mixing and grinding, and better basis is provided for tight bonding of alloy; and then the WC-Co alloy powder is treated by hot pressed sintering and heat treatment, and the hard alloy material with higher hardness and strength can be obtained.

Description

technical field [0001] The invention relates to a processing method of cemented carbide materials. Background technique [0002] The amount of cemented carbide used in mining, coal and oil drilling is very large. Due to technical limitations, these cemented carbide tools for rock drilling have changed little over the years, and these changes are nothing more than controlling the purity of the alloy and the composition of the binder phase. Wait. At present, cemented carbide tools for mining mainly use WC-Co alloy. In general, the alloy composition of percussion drill bits for drilling, coal mining and asphalt cutting is WC and 6-11% Co, and the alloys for different purposes, because some properties are improved, other properties are reduced. For example, high wear-resistant alloys usually have poor toughness, on the contrary, alloys with good toughness have poor wear resistance. Reducing the Co content and increasing the hardness can reduce the wear of the alloy, while inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05B22F3/14B22F9/02
CPCC22C1/051C22C29/08B22F3/14B22F9/026B22F2998/10B22F1/10B22F2003/248B22F2009/041
Inventor 李祥明田源李贤良
Owner 柳州增程材料科技有限公司
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