Method for enabling metal surface to penetrate nano powder by laser-induced impact

A metal surface, laser-induced technology, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of complex operation process, shedding, strict requirements on the shape and size of the test piece, etc., and achieve low cost and easy operation. The effect of simple process

Inactive Publication Date: 2015-09-30
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods also have various problems, such as shot peening nano-implantation, it is necessary to make nano-particle clusters in advance, and then spray them on the surface of the test piece by cold spraying to ensure the formation of micro-particle

Method used

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  • Method for enabling metal surface to penetrate nano powder by laser-induced impact
  • Method for enabling metal surface to penetrate nano powder by laser-induced impact

Examples

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Embodiment 1

[0025] The base metal in this example is: 6082 aluminum alloy (200mm×100mm×3mm), which is mechanically polished, then cleaned with 75% alcohol, dried for later use, and the nanoparticles are nickel alloy;

[0026] This embodiment proceeds according to the following steps:

[0027] (1) In the clean room, coat the surface of the absorbing layer to form a 0.1mm thick nanoparticle coating layer, and cover the above absorbing layer on the working end surface of the target;

[0028] (2) Install the working end surface of the target covered with the absorbing layer on the workbench, and apply a constrained layer with a thickness of 1mm on the absorbing layer;

[0029] (3) Face the metal surface of the substrate to be treated to the laser beam, and perform pre-infiltration treatment with a laser beam with a laser pulse width of 20ns, a laser wavelength of 1064nm, a laser beam diameter of 5mm, a laser energy of 1J, and a repetition rate of 2Hz. Among them, the overlapping rate is ...

Embodiment 2

[0034] The base metal in this example is TC4 titanium alloy (100mm×100mm×2mm), after mechanical polishing, then the surface is cleaned with 75% alcohol, dried for later use, and the nano metal particles are tungsten carbide;

[0035] This embodiment proceeds according to the following steps:

[0036] (1) In the clean room, coat the surface of the absorbing layer to form a 0.1mm thick nanoparticle coating layer, and cover the above absorbing layer on the working end surface of the target;

[0037] (2) Install the working end surface of the target covered with the absorbing layer on the workbench, and apply a constrained layer with a thickness of 2mm on the absorbing layer;

[0038] (3) Face the metal surface of the base material to be treated to the laser beam, and perform pre-infiltration treatment with a laser beam with a laser pulse width of 40ns, a laser wavelength of 1064nm, a laser beam diameter of 3mm, a laser energy of 5J, and a repetition rate of 2Hz. Among them, the ...

Embodiment 3

[0043]The base metal in this example is: 6082 aluminum alloy (200mm×100mm×3mm), which is mechanically polished, then cleaned with 75% alcohol, dried for later use, and the nanoparticles are nickel alloy;

[0044] This embodiment proceeds according to the following steps:

[0045] (1) In the clean room, coat the surface of the absorbing layer to form a 0.1mm thick nanoparticle coating layer, and cover the above absorbing layer on the working end surface of the target;

[0046] (2) Install the working end surface of the target covered with the absorbing layer on the workbench, and apply a constrained layer with a thickness of 3 mm on the absorbing layer;

[0047] (3) Face the metal surface of the substrate to be treated to the laser beam, and perform pre-infiltration treatment with a laser beam with a laser pulse width of 30ns, a laser wavelength of 1064nm, a laser beam diameter of 2mm, a laser energy of 3J, and a repetition rate of 2Hz. Among them, the overlapping rate is ...

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Abstract

The invention belongs to the technical field of metal material surface treatment, and particularly relates to a method for enabling a metal surface to penetrate nano powder by laser-induced impact. The method comprises the following steps: coating on the surface of an absorption layer to form a nano particle coating layer, and covering the nano particle coating layer on a working end surface of a target material; applying a restraint layer on the absorption layer; enabling a to-be-treated substrate metal surface to face towards a laser beam, firstly carrying out pre-penetration treatment and then carrying out penetration treatment on the to-be-treated substrate metal surface; and enabling the substrate metal surface obtained by cleaning to penetrate into nano particles, thereby improving the hardness of the substrate metal surface. The method is simple in operation process, and is a metal surface treatment technology which is low in cost, efficient and green. According to the method, element components of the metal substrate surface are improved, the elements of the metal surface are re-distributed, and lattice distortion, dislocation and grain refinement are caused, so that the strength and the hardness of the metal surface are improved, and thus, the abrasion-resistance of a metal component is improved and a fatigue life of the metal component is prolonged.

Description

technical field [0001] The invention belongs to the technical field of metal material surface treatment, and in particular relates to a method for infiltrating nanometer powder on a metal surface through laser-induced shock. Background technique [0002] Surface integrity control technology is usually the last process in the manufacture of high-performance parts, and it is also the most critical process. Its purpose is to improve the surface quality and mechanical properties of large precision parts, so that the parts can achieve the expected performance. Large precision parts not only require dimensional accuracy, shape accuracy, surface roughness, etc., but also require the final mechanical and chemical properties of precision parts, including fatigue resistance, hardness, wear resistance and corrosion resistance, etc., and ultimately affect the assembly of parts and performance. In order to improve the mechanical / chemical properties of parts, surface strengthening metho...

Claims

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Application Information

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IPC IPC(8): C23C10/30
Inventor 刘军冯艳君宋凯乔红超马平全闫家超
Owner SHENYANG LIGONG UNIV
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