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A Novel Method for Interface Microstructure Fabrication in Polymer/Metal Hybrid Structures

A technology of mixed structure and microstructure, which is applied to form fine periodic microstructure on the metal surface. In the field of metal surface treatment, it can solve the problems such as the inability to form interface microstructure, so as to improve the effective bonding area and surface energy, and the directionality is flexible. The effect of controllable structure shape

Active Publication Date: 2018-06-12
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, various physical (such as: frosting, degreasing, shot blasting, etc.) and chemical (such as: pickling, coating with organosilane, etc.) methods currently used on metal surfaces can only remove impurities on the metal surface to a certain extent. Improve the effective bonding area of ​​the interface, but cannot form an ordered interface microstructure

Method used

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  • A Novel Method for Interface Microstructure Fabrication in Polymer/Metal Hybrid Structures
  • A Novel Method for Interface Microstructure Fabrication in Polymer/Metal Hybrid Structures
  • A Novel Method for Interface Microstructure Fabrication in Polymer/Metal Hybrid Structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1: Clean, degrease, grind, polish and dry the metal surface of high-strength steel or aluminum to be processed;

[0036] Step 2: Using a laser, adjust the angle 9 between the laser beam 11 and the working surface 2 , and focus and irradiate the working surface 2 to form a microstructure shape with an inclined surface 10 . Move 33 μm according to the feed speed b, turn off the laser beam 11 , and then adjust the laser beam to the position 12 , similarly to obtain a microstructure shape with an inclined surface 13 . Obtain a fine microstructure8. The angle 9 of the working surface is 60°. The microstructure depth 15 is 30 μm. The laser is a P-second laser, the output wavelength of the laser is 1064nm, the peak power of the pulsed laser beam of the laser is 15W to 50W, and the energy density is 1.9×10 7 W / cm 2 ~6.4×10 7 W / cm 2 .

[0037]

[0038] The length 3 of the fine microstructure shape is 30 μm, the width 17 is the same as the laser beam spot diameter,...

Embodiment 2

[0042] Similarly, a laser is used to adjust the angle 19 between the laser beam 23 and the working surface 2 , and focus and irradiate the working surface 2 to form a microstructure shape with an inclined surface 21 . Turn off the laser beam 23, move 10 μm, and then continue to focus and irradiate to form the groove 25, and then adjust the laser beam to the position 24, and similarly obtain the microstructure shape and the groove 27 with the slope 26. Other than that, it is the same as Example 1.

Embodiment 3

[0044] In Embodiment 3, it is only necessary to penetrate the microstructure 8 in the width direction 6 of the metal surface. Other than that, it is the same as in Example 1.

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Abstract

The invention discloses a novel method for processing an interface microstructure of a metal material and particularly relates to a novel method for processing the interface microstructure in the polymer / metal mixed structure. The novel method adopts a laser surface treatment technology of narrow pulse laser beams and is particularly suitable for forming fine periodic micro-structures on the surfaces of metal such as high-strength steel and aluminum. The method mainly includes the steps that (1) a to-be-processed surface of the metal material is subjected to pretreatment; (2) micro-texturing is performed on the pre-treated to-be-processed surface, and a fine periodic micro-structure is obtained; and (3) the pulse laser beams are closed, laser action is stopped, and then cooling is conducted. According to the novel method for processing the interface microstructure in the polymer / metal mixed structure, the fine periodic structure can be formed without change of the metal surface tenacity through the laser surface treatment method, the regularity of the surface roughness of the fine periodic structure is greatly improved, the interface adhesion performance of the polymer-metal mixed structure is improved, the service life of the polymer-metal mixed structure is prolonged, the whole process is free of pollution, and the novel method is simple and easy to operate.

Description

technical field [0001] The invention relates to a metal surface treatment method, in particular to a new method for processing interface microstructures in polymer / metal hybrid structures, a laser surface treatment technology using a narrow pulse laser beam, and is more particularly suitable for high-strength steel, aluminum, etc. The metal surface forms a fine periodic microstructure, which belongs to the field of new lightweight materials for automobiles. Background technique [0002] In the traditional automotive industry, polymers and metals are used separately. With the requirements of energy saving, emission reduction and light weight, polymer-metal hybrid structures that combine high-strength metals with low-weight polymers have been developed. However, the interface performance between the two is the key to ensure the normal service of the hybrid structure. Among them, the micromechanical locking of the interface is one of the effective methods to improve the interf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/352
CPCB23K26/3584
Inventor 孙凌玉黄彬城李立军张胜强申乐朱盼
Owner BEIHANG UNIV