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Technology for preparing hard alloy material

A cemented carbide and process technology, applied in the field of preparing cemented carbide materials, can solve problems such as insufficient hardness and strength, achieve high hardness and strength, and improve mechanical activity

Inactive Publication Date: 2017-02-15
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

[0025] 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 Then mix the alloy powder with distilled water, and the mass ratio of alloy powder and distilled water is 2.5:1, and add 2% metal granulating agent of the alloy powder mass and stir evenly to prepare metal powder slurry; then pass the slurry through centrifugation The spray granulator is used for granulation, where the inlet temperature of the dry air of the spray granulator is 250°C, the outlet temperature is 100°C, and the flow rate of the dry air is 100 Nm 3 / h, the feed rate is 10kg / h, and the rotating speed of the centrifugal spray granulator is 5000 rpm; then solid solution treatment at 650°C for 12min; then cold pressing deformation treatment, the cold pressing deformation is 30%; ℃ aging treatment for 3h, to obtain WC-Co cemented carbide material. The ...

Embodiment 2

[0027] 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; then mix the alloy powder with deionized water, and the mass ratio of alloy powder and deionized water is 2.8:1, and add 3% metal granulating agent of alloy powder quality and stir evenly, and prepare metal powder slurry; The slurry is granulated by a centrifugal spray granulator, wherein the rotational speed of the centrifugal spray granulator is 6000 rpm, the inlet temperature of the dry air of the spray granulator is 300°C, the outlet temperature is 130°C, and the flow rate of the dry air is 150 Nm 3 / h, the feed rate is 15 kg / h; followed by solid solution treatment at 680°C for 11min; followed by cold deformation treatment, the cold deformation amount is 32%; finally aging treatment at 330°C for 2.5h, to obtain WC-Co hard alloy. The measured...

Embodiment 3

[0029] 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; then mix the alloy powder with deionized water, and the mass ratio of alloy powder and deionized water is 3:1, and add 4% metal granulating agent of alloy powder quality and stir evenly, and prepare metal powder slurry; The slurry is granulated by a centrifugal spray granulator, wherein the rotational speed of the centrifugal spray granulator is 8000 rpm, the inlet temperature of the dry air of the spray granulator is 350°C, the outlet temperature is 150°C, and the flow rate of the dry air is 200 Nm 3 / h, the feed rate is 20 kg / h; followed by solution treatment at 700°C for 10min; followed by cold deformation treatment, the cold deformation amount is 35%; finally, aging treatment at 350°C for 2h, to obtain WC-Co cemented carbide Material. The measured hardn...

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Abstract

The invention relates to a technology for preparing a hard alloy material. The technology includes the steps that WC grains and Co grains are cleaned, and surface impurities are removed; the cleaned WC grains and Co grains are smashed into powder particles; then the powder particles are evenly mixed in a material mixer for grinding, so that alloyed powder is obtained; the alloyed powder and liquid are mixed, and the organic bond is added for even stirring to be prepared into metal powder slurry; and afterwards, the slurry is made into powder through a spray pelletizer, and then heat treatment is performed. By the adoption of the technology, impurities on the metal powder surface can be removed through the cleaning technology, and the purity of alloy in follow-up preparation is improved; then mechanical activity of the powder can be improved by means of mixing and grinding, and a good foundation is provided for close integration of the alloy; and then pelleting and heat treatment are carried out, and accordingly the hard alloy material with high hardness and strength can be obtained.

Description

technical field [0001] The invention relates to a process for preparing 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 in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05B22F9/02B22F1/00
CPCC22C1/051C22C29/08B22F9/026B22F2999/00B22F2998/10B22F1/14B22F1/142B22F2202/17B22F1/10B22F9/04
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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