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

A diamond coating and cemented carbide technology, which is applied in metal material coating process, coating, vacuum evaporation plating and other directions, can solve the problems affecting the bonding strength of diamond coating film base and the quality of diamond coating, so as to improve the quality of the diamond coating. Crystal uniformity, improve the bonding force of the film base, and inhibit the effect of out-diffusion

Active Publication Date: 2020-04-21
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 surface of cobalt-containing hard alloy 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 cobalt-containing hard alloy and a tool and mold with a diamond coating. According to the invention, the surface ofa sample is subjected to sand blasting and cleaning treatment, an ideal basis is provided for high density and homogenization of diamond particles in an ultrasonic grinding and crystal planting stageand a mechanical riveting 'inlaying' effect of a grown diamond coating, the crystal planting uniformity and the 'inlaying' effect are improved, a ternary nitride coating with high aluminum content isselected as an insertion layer, the insertion layer is stable at high temperature, does not react with a surrounding medium, and has almost zero solid solubility to cobalt, the coefficient of thermalexpansion of the insertion layer is between the coefficient of thermal expansion of the diamond coating and the coefficient of thermal expansion of a hard alloy matrix, a cobalt element in the hard alloy matrix can be effectively prevented from diffusing outwards, the nucleation interface strength of the diamond coating and the quality of the diamond coating are improved, and therefore the film-substrate binding force of the diamond coating and the quality of the diamond coating are effectively improved.

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 Applications(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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