Method and device for efficiently preparing high-performance coating layer

A high-performance, coating technology, applied in coating, metal material coating process, etc., can solve the problem that the cladding material and the substrate material are very different, the cladding layer is prone to cracking and falling off, and the cladding/substrate interface Solve problems such as large stress, achieve the effect of improving preparation efficiency and performance, improving resistance to fracture and anti-shedding, and improving the matching of thermal expansion coefficient and mechanical properties

Pending Publication Date: 2021-02-05
武汉飞能达激光技术有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in practical application, it is found that the cladding layer prepared by ultra-high-speed laser cladding is prone to cracking and falling off during the service process. After research, it is found that the main reason is that the physical and mechanical properties of the cladding material and the base material are very different. The "extremely low dilution rate" of the cladding layer in the ultra-high-speed laser cladding technology makes the bonding area between the cladding layer and the substrate smaller than that of the traditional laser cladding technology, and also makes the transition layer between the cladding layer and the substrate ( That is, the width of the base dilution layer) is very small, which cannot effectively slow down the performance difference between the two, which in turn causes the stress at the interface of the coating / substrate to be large during the subsequent service process, resulting in cracking or falling off of the cladding layer

Method used

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  • Method and device for efficiently preparing high-performance coating layer
  • Method and device for efficiently preparing high-performance coating layer
  • Method and device for efficiently preparing high-performance coating layer

Examples

Experimental program
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Embodiment 1

[0063] In this embodiment, laser precision etching is used to process the discrete lattice microstructure array + an ultra-high-speed laser cladding process to prepare a cladding layer on the surface of the shaft workpiece. In this embodiment, a shaft-like workpiece is used as the substrate. First, a discrete pit microstructure array is obtained on the surface of the substrate by using a laser precision etching process, and then a cladding layer is prepared on the roughened microstructure surface by an ultra-high-speed laser cladding process. Specifically, a roll with a roll diameter of 245mm is used as an example for illustration. It is also applicable to solid shaft parts with other roll diameters. The implementation steps include:

[0064] (1) Ni-based alloy powder with a particle size of 25 μm-60 μm is selected as the cladding material, and the main chemical composition is (Wt.%): (0.01-0.50) C, (20-30) Cr, (5-10) W, (3-5)Si, (0-3)B, (5-10)Fe, the balance Ni; the base mate...

Embodiment 2

[0072] In this embodiment, a linear groove microstructure array is processed by laser precision etching + an ultra-high-speed laser-induction composite cladding process is used to prepare a cladding layer on the surface of a shaft workpiece. In this example, the shaft workpiece is used as the substrate. First, the linear groove microstructure array is obtained on the surface of the substrate by laser precision etching processing technology, and then the roughened microstructure surface is prepared by ultra-high-speed laser-induction composite cladding technology. cladding layer. Specifically, a roll with a roll diameter of 100mm is used as an example for illustration. It is also applicable to solid shaft parts with other roll diameters. The specific implementation steps include:

[0073] (1) Co-based alloy powder with a particle size of 25 μm-60 μm is selected as the cladding material, and the main chemical composition is (Wt.%): (0.01-0.5) C, (20-35) Cr, (1-10) Ni, (1-3) Si,...

Embodiment 3

[0081] In this embodiment, a grid-like groove microstructure array is processed by laser precision etching + an ultra-high-speed laser cladding process is used to prepare a cladding layer on the surface of a plate-shaped / block-shaped workpiece. In this embodiment, a block or plate-shaped workpiece is used as the substrate. First, a grid-like groove microstructure array is obtained on the surface of the substrate by using a laser precision etching process. Prepare cladding layer. The specific implementation steps include:

[0082] (1) Ni-based alloy-WC cermet composite powder is selected as the cladding material, wherein the Ni alloy is Ni60 alloy powder with a particle size of 25 μm-60 μm, and the WC is cast WC with a particle size of 20 μm-50 μm. The two are mixed by mechanical mixing; The base material is ordinary low carbon steel;

[0083] (2) Use a fixture to fix the workpiece on the working platform. First, use a grinder or sandpaper to polish the area to be clad on the...

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Abstract

The invention belongs to the field of surface coating processing, and particularly discloses a method and a device for efficiently preparing a high-performance coating layer. According to the method,firstly, laser etching is carried out on the surface of a workpiece to be treated to form a microstructure array; and then a cladding layer is deposited on the surface of the workpiece etched with themicrostructure array by utilizing an ultra-high-speed laser cladding technology or an ultra-high-speed laser induction composite cladding technology so as to realize high-efficiency preparation of the high-performance coating layer. According to the method and the device, while the high-performance cladding layer is prepared on the surface of a metal component, the interface bonding area and bonding strength of the cladding layer and a substrate can be improved, the interface stress of the cladding layer and the substrate is reduced, the cladding layer is prevented from being broken and peeled off in the service process, and then the fatigue performance and friction and wear properties of the cladding layer are improved.

Description

technical field [0001] The invention belongs to the field of surface coating processing, and more specifically relates to a method and device for preparing a high-performance coating layer with high efficiency. Background technique [0002] With the rapid development of modern industry in the direction of faster, more precise and higher efficiency, the service conditions of various mechanical parts are getting worse, and the overall scrapping cycle of parts is greatly shortened due to surface local failure behaviors such as surface wear, fatigue and corrosion. . Surface coating technology can cladding high-performance cladding materials on the surface of parts without changing the internal structure and properties of the matrix material, so that the overall service performance can be significantly improved. [0003] At present, the commonly used coating preparation technologies for metal materials mainly include electroplating, thermal spraying, spray welding and laser clad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 曾晓雁孟丽王邓志胡乾午郭平华许晓明魏世星
Owner 武汉飞能达激光技术有限公司
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