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Method for preparing diamond coating on cobalt-containing hard alloy surface and tool and die with diamond coating

A technology of diamond coating and hard alloy, which is applied in the direction of metal material coating process, coating, vacuum evaporation plating, etc., and can solve the problems affecting the bonding strength of diamond coating film base and the quality of diamond coating

Active Publication Date: 2022-05-17
CONPROFE TECH GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This seriously affects the film-base bonding strength of the diamond coating and the quality of the diamond coating itself.

Method used

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  • Method for preparing diamond coating on cobalt-containing hard alloy surface and tool and die with diamond coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Method for preparing diamond coating on the surface of YG6 cemented carbide

[0056] 1) The φ20mm*5mm YG6 cemented carbide sample after surface polishing is subjected to dry sandblasting and wet sandblasting in sequence. The distance between the nozzle of the spray gun and the surface of the YG6 cemented carbide sample is 50 mm, and the spray angle is 90 o . Dry sandblasting uses 320 mesh white corundum sand, the sandblasting pressure is 0.3MPa, and the time is 60s; wet sandblasting uses 600 mesh white corundum sand, the sandblasting pressure is 0.2MPa, and the time is 150s.

[0057] 2) Use the commercially available WIN-92 metal cleaning agent (WIN-92 is a multi-functional and efficient water-based cleaning agent, containing a variety of surfactants, alkaline additives, penetrating agents, and strong degreasing ability) for ultrasonic tank removal Oil stains and residual sand particles on the surface of YG6 cemented carbide, the ultrasonic frequency is 28KHz, the ult...

Embodiment 2

[0062] Method for preparing diamond coating on the surface of YG10 cemented carbide

[0063] 1) The φ20mm*5mm YG10 cemented carbide sample after surface polishing is subjected to dry sandblasting and wet sandblasting in sequence. The distance between the nozzle of the spray gun and the surface of the YG10 cemented carbide sample is 50mm, and the spray angle is 90°. Dry sandblasting uses 320 mesh white corundum sand, the sandblasting pressure is 0.3MPa, and the time is 120s; wet sandblasting uses 600 mesh white corundum sand, the sandblasting pressure is 0.4MPa, and the time is 90s.

[0064] 2) Use the ultrasonic tank of commercially available WIN-92 metal cleaning agent to remove the oil stain on the surface of the YG10 cemented carbide sample. The ultrasonic frequency is 28KHz, the ultrasonic intensity is 30W / L, and the ultrasonic time is 30min; after rinsing and drying, the surface roughness Ra is obtained. 0.39μm cemented carbide surface.

[0065] 3) Put the cleaned YG10 ...

Embodiment 3

[0069] Method for preparing diamond coating on the surface of YG6 cemented carbide

[0070] 1) The φ20mm*5mm YG6 cemented carbide sample after surface polishing is subjected to dry sandblasting and wet sandblasting in sequence. The distance between the nozzle of the spray gun and the surface of the YG6 cemented carbide sample is 50mm, and the spray angle is 90°. Dry sandblasting uses 320 mesh white corundum sand, the sandblasting pressure is 0.3MPa, and the time is 90s; wet sandblasting uses 600 mesh white corundum sand, the sandblasting pressure is 0.2MPa, and the time is 120s.

[0071]2) Use the ultrasonic tank of commercially available WIN-92 metal cleaning agent to remove the oil stain on the surface of the YG6 cemented carbide sample. The ultrasonic frequency is 28KHz, the ultrasonic intensity is 25W / L, and the ultrasonic time is 15min; after rinsing and drying, the surface roughness Ra is obtained. 0.33μm cemented carbide surface.

[0072] 3) Put the cleaned YG6 cement...

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Abstract

The invention relates to a method for preparing a diamond coating on the surface of a cobalt-containing hard alloy and a tool and mold with a diamond coating. Sandblasting and cleaning treatment are performed on the surface of the sample to achieve high density and uniformity of the diamond particles in the ultrasonic grinding and planting stage. The mechanical riveting "mosaic" effect of the crystallized and grown diamond coating provides an ideal foundation, which improves the uniformity of the crystal planting and the "mosaic" effect. The ternary nitride coating with high aluminum content is selected as the insertion layer, and the insertion layer is high temperature Stable, will not react with the surrounding medium, the solid solubility of cobalt is almost zero, the thermal expansion coefficient of the insertion layer is between the diamond coating and the cemented carbide substrate, which can effectively inhibit the cobalt element in the cemented carbide substrate from External diffusion, improve the interface strength of diamond coating nucleation and the quality of diamond coating, so as to effectively improve the film-base bonding force of diamond coating and the quality of diamond coating itself.

Description

technical field [0001] The invention relates to the technical field of hard alloy surface treatment, in particular to a method for preparing a diamond coating on the surface of a cobalt-containing hard alloy and a tool and mold with the diamond coating. Background technique [0002] With the rapid development of advanced manufacturing industry, new materials such as non-ferrous metals and alloys, composite materials, graphite and ceramics are widely used. Therefore, the requirements for cemented carbide tools and molds are getting higher and higher. The surface of cemented carbide tools and molds is coated with diamond. Coating has become a research hotspot. However, the bonding force between the diamond coating and the cemented carbide film is weak, which makes the diamond coating easy to peel off during use, making it difficult to exert the excellent performance of the diamond coating. This has become a common technical difficulty in the industry. [0003] For cobalt-bond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/27C23C16/02C23C14/32C23C14/06C23C14/35
CPCC23C16/271C23C16/0272C23C16/0227C23C14/325C23C14/0641C23C14/0021C23C14/0036
Inventor 李伟秋颜炳姜彭继华
Owner CONPROFE TECH GRP CO LTD
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