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Laser surface alloying method

A laser alloying and laser technology, which is applied in the field of laser surface alloying, can solve the problems of long-term heat accumulation, high stress of the workpiece, and increased difficulty, and achieve the effects of small deformation, increased wear resistance, and improved wear resistance

Inactive Publication Date: 2018-11-30
北京煜鼎增材制造研究院股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of sequential processing is that the heat accumulates for a long time, resulting in higher stress and larger deformation in the workpiece, which increases the difficulty of subsequent processing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 laser surface alloying method X1

[0031] Specifically include the following steps:

[0032] The carbon coating process consists of colloid preparation containing carbon powder, carbon coating on the surface of the workpiece, and drying. The colloid preparation adopts the method of compound addition, that is, adding alcohol and acetone to the nano-sized carbon powder to obtain a colloid with a high viscosity, and then adding carbon powder, alcohol and acetone in sequence after standing for 5 minutes to further improve its fluidity. Dispersion. After the preparation of the colloid is completed, the self-designed carbon coating device is used to coat the surface of the cleaned and dried workpiece, and the quantitative control of the carbon powder is carried out by adjusting the brush in the vertical direction. Drying is then carried out to obtain a workpiece coated with uniform carbon powder on the surface.

[0033] In the process of laser alloying, it is ...

Embodiment 2

[0039] Embodiment 2 laser surface alloying method X2

[0040]Add alcohol and acetone to the nano-sized carbon powder to obtain a colloid with high viscosity. After standing for 5 minutes, add carbon powder, alcohol and acetone in order to further improve its fluidity and dispersion. After the preparation of the colloid is completed, the self-designed carbon coating device is used to coat the surface of the cleaned and dried workpiece, and the quantitative control of the carbon powder is carried out by adjusting the brush in the vertical direction. Drying is then carried out to obtain a workpiece coated with uniform carbon powder on the surface.

[0041] Divide the surface of the metal workpiece into 5 work areas, each work area is 5×5cm in size, and each work area is divided into 100 light spots, each light spot size is 4.5×4.5mm. A white border with a width of about 0.5mm flows out from the edge of the workpiece.

[0042] Put the workpiece into the operation box, use argon ...

Embodiment 3

[0047] Embodiment 3 laser surface alloying method X3

[0048] Add alcohol and acetone to the nano-sized carbon powder to obtain a colloid with high viscosity. After standing for 5 minutes, add carbon powder, alcohol and acetone in order to further improve its fluidity and dispersion. After the preparation of the colloid is completed, the self-designed carbon coating device is used to coat the surface of the cleaned and dried workpiece, and the quantitative control of the carbon powder is carried out by adjusting the brush in the vertical direction. Drying is then carried out to obtain a workpiece coated with uniform carbon powder on the surface.

[0049] Divide the surface of the metal workpiece into 2 working areas, the size of each working area is 3×3cm, divide each working area into 100 light spot positions, and the size of each light spot position is 2.5×2.5mm. A white border with a width of about 0.5mm flows out from the edge of the workpiece.

[0050] Put the workpiece...

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Abstract

The invention relates to a laser surface alloying method for metal materials. The laser surface alloying method comprises the following steps: prefabricating nanocarbon powder on a metal surface; dividing the metal surface with the prefabricated nanocarbon powder into one or more working areas; dividing each working area into a number of square spot sites, wherein the size of each spot site is (1.5-5.5)*(1.5-5.5) mm; in an argon-protected low-oxygen environment, allowing low-power laser to randomly act on the discrete spot sites until all the spot sites form point-shaped shallow pools; and carrying out cooling so as to complete alloying. According to the invention, shallow alloying is realized by using a low-power high-power-density short-time laser action mode; laser action points in eachregion are randomly distributed to form discrete points, and the purposes of fast heat dissipation, small thermal stress, low workpiece deformation, high surface quality and small processing allowance are achieved; and after alloying, a cross-section coating has high hardness, and the hardness of heat-affected areas is slightly lower than a matrix, so wear resistance is further improved through compounding of hardness and softness.

Description

technical field [0001] The invention relates to a laser surface alloying method. Background technique [0002] Laser surface alloying is one of the laser surface modification technologies commonly used in the industrial field. It not only has the main advantages of laser surface treatment, such as self-conduction rapid cooling, high work efficiency, clean and pollution-free, easy to control the treatment process and treatment area, It is easy to realize automation, etc., and it is also possible to obtain a solidified structure with ideal properties on the surface of the component by controlling and changing the alloy composition of the surface. Low carbon steel is cheap, easy to produce and process, has good strength and toughness, and is widely used in industrial production. It is of great significance to use laser surface alloying technology to obtain a structure with high hardness, high wear resistance and corrosion resistance on the surface of low carbon steel. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/10
Inventor 何蓓刘栋李佳程序李安张述泉汤海波王华明
Owner 北京煜鼎增材制造研究院股份有限公司
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