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Metal-based/diamond laser composite coating and preparation method thereof

一种复合涂层、金刚石的技术，应用在金属材料涂层工艺、激光焊接设备、金属加工设备等方向，能够解决金刚石体积含量难以超过45％、涂层与基体结合力差、金刚石颗粒易脱落等问题，达到避免容易分解和溶解、不易脱落、结合良好的效果

Active Publication Date: 2014-09-03
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the above-mentioned deficiencies in the existing metal-based / diamond composite coating preparation technology, and provides a composite coating using metal powder with a hardness > 50HRC as the diamond binder phase and its efficient preparation method, which solves the problem of prior art preparation. High-hardness metal matrix / diamond composite coating is thin, diamond particles in the coating are easy to fall off, diamonds in the composite coating are easy to decompose, the volume content of diamond in the coating is difficult to exceed 45%, and the bonding force between the coating and the substrate is poor.

Method used

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  • Metal-based/diamond laser composite coating and preparation method thereof
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  • Metal-based/diamond laser composite coating and preparation method thereof

Examples

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example 1

[0041] Ni60 powder is selected as the binder phase to mix with diamond particles, the average particle size of Ni60 powder is 18 μm, and diamond is selected as -400 mesh; Ni60 powder and diamond powder are mixed in a planetary ball mill at a mass ratio of 4:1, and the ball-to-material ratio is 30:1 , the ball milling speed is 500r / min, the mixing time is 2h, the microscopic appearance of the composite powder after ball milling is as follows figure 2 As shown; the base material is 45# steel plate of 100×50×10mm; the high hardness metal matrix / diamond composite coating is prepared synchronously by laser texturing and laser-assisted cold spraying technology; the laser texturing adopts fiber laser, and the laser pulse energy density is 106W / cm 2 , the pulse width is 1ms, the wavelength is 1510nm; the spraying carrier gas is 3MPa compressed nitrogen, and the preheating temperature of the carrier gas is 500°C; the closed-loop feedback temperature control mode is used to adjust the ...

example 2

[0044] Ni60 powder is selected as the binder phase and mixed with diamond particles. The average particle size of Ni60 powder is 18 μm, and the diamond is selected from -400 mesh; Ni60 powder and diamond powder are mixed in a vibratory ball mill with a mass ratio of 3:2, and the ball-to-material ratio is 30: 1. The ball milling time is 60min, and the vibration frequency is 800r / min; the base material is a stainless steel plate of 100×50×10mm, and a high-hardness metal-based / diamond composite coating is prepared simultaneously by laser texturing and laser-assisted cold spraying technology; laser roughening The chemical fiber laser is used, and the laser pulse energy density is 106W / cm 2 , the pulse width is 1ms, the wavelength is 1510nm; the spraying carrier gas is 3MPa compressed nitrogen, and the preheating temperature of the carrier gas is 550°C; the closed-loop feedback temperature control mode is used to adjust the power of the semiconductor laser, and the control temperatu...

example 3

[0047] Choose stellite20 powder as the binder phase and mix it with diamond particles. The average particle size of stellite20 powder is 20 μm, and the diamond is selected from -400 mesh; stellite20 powder and diamond powder are mixed in a vibratory ball mill with a mass ratio of 4:1, and the ball-to-material ratio is 60: 1. The ball milling time is 60min, and the vibration frequency is 1200r / min; the base material is 45# steel rod; the high hardness metal matrix / diamond composite coating is prepared synchronously by laser texturing and laser-assisted cold spraying technology; the laser texturing adopts fiber laser , the laser pulse energy density is 106W / cm 2 , the pulse width is 1.5ms, the wavelength is 1640nm; the spray carrier gas is 3MPa compressed nitrogen, and the preheating temperature of the carrier gas is 600°C; the semiconductor laser power is adjusted by the closed-loop feedback temperature control mode, and the control temperature is 900°C; the laser spot is textur...

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Abstract

The invention discloses a metal-based diamond laser composite coating and a preparation method thereof. The preparation method comprises the following steps: firstly selecting high-hardness metal powder and diamond powder with proper grain size and shape, uniformly mixing the high-hardness metal powder and the diamond powder by using a ball-milling method, and finally preparing the composite coating on a matrix by using a method of synchronously compounding a laser texturing technology, a laser heat treatment technology and a cold spraying technology. The thickness of the composite coating is over 1mm, and the diamond volume content in the coating is more than 45%. The preparation of the composite coating by using the high-hardness metal powder as the diamond binding phase is realized, and the binding strength of the composite coating and the matrix is improved through the pulse texturing treatment, and finally the stable and high-quality high-hardness metal-based / diamond composite high wear-resisting coating is prepared, and the integration, the automation and the efficiency of the matrix surface treatment and the coating deposition treatment are realized.

Description

technical field [0001] The invention relates to the field of material surface modification, in particular to a high-hardness metal matrix / diamond composite coating and an efficient preparation method thereof. Background technique [0002] Cermet has the advantages of both metal and ceramics. It has low density, high hardness, wear resistance, good thermal conductivity, and will not be brittle due to sudden cooling or heat. Cermet not only has the toughness, high thermal conductivity and good thermal stability of metal, but also has the characteristics of high temperature resistance, corrosion resistance and wear resistance of ceramics. There are mainly sintered aluminum (aluminum-alumina), sintered beryllium (beryllium-beryllium oxide), TD nickel (nickel-thorium oxide) and so on. A composite material composed of one or several ceramic phases and metal phases or alloys. In a broad sense, cermets also include refractory compound alloys, hard alloys, and metal-bonded diamond t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/04B05B3/00B23K26/00C23C24/10
Inventor 姚建华李波陈智君张群莉胡晓冬董刚吴国龙王梁弗拉基米尔·科瓦连柯
Owner ZHEJIANG UNIV OF TECH
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