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Femtosecond laser surface pretreatment method for improving bonding state of layer base or film base

A technology of surface pretreatment and femtosecond laser, which is applied in the field of femtosecond laser technology application, can solve problems that do not involve femtosecond laser pretreatment methods, etc., and achieve the effect of improving the bonding state, increasing the bonding strength, and simple process

Inactive Publication Date: 2014-04-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the above three methods involve the femtosecond laser as a means of material pretreatment.

Method used

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  • Femtosecond laser surface pretreatment method for improving bonding state of layer base or film base
  • Femtosecond laser surface pretreatment method for improving bonding state of layer base or film base
  • Femtosecond laser surface pretreatment method for improving bonding state of layer base or film base

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The 4340 steel directly deposited by the laser is preliminarily polished with sandpaper; the femtosecond laser is turned on to pretreat the surface of the 4340 steel. The specific process parameters are as follows: the laser repetition frequency is 1000 kHz, the pulse energy is 8 μJ, the scanning speed is 480 mm / s, and the number of repeated scanning is 120 times.

[0033] Then without any other pretreatment, the electroless Ni-P plating experiment was carried out on the 4340 steel pretreated by femtosecond laser. After metallographic sample preparation, observe the combination of the cross section after pretreatment and electroless plating, such as figure 2 shown. For the convenience of comparison, the untreated 4340 steel was electroless plated as a comparison sample, and the combination of the cross section is shown in figure 1 . It can be seen that the combination of the untreated 4340 steel electroless coating and the substrate is discontinuous, and some areas ...

Embodiment 2

[0035] The 4340 steel directly deposited by the laser is preliminarily polished with sandpaper; the femtosecond laser is turned on to pretreat the surface of the 4340 steel. The specific process parameters are as follows: the laser repetition frequency is 1000 kHz, the pulse energy is 8 μJ, the scanning speed is 1200 mm / s, and the number of repeated scanning is 300 times.

[0036] Then without any other pretreatment, the electroless Ni-P plating experiment was carried out on the 4340 steel pretreated by femtosecond laser. After metallographic sample preparation, observe the combination of the cross section after pretreatment and electroless plating, such as image 3 shown. For the convenience of comparison, the untreated 4340 steel was electroless plated as a comparison sample, and the combination of the cross section is shown in figure 1 . It can be seen that the combination of the untreated 4340 steel electroless coating and the substrate is discontinuous, and some areas ...

Embodiment 3

[0038] The 4340 steel directly deposited by the laser is preliminarily polished with sandpaper; the femtosecond laser is turned on to pretreat the surface of the 4340 steel. The specific process parameters are as follows: the laser repetition frequency is 500 kHz, the pulse energy is 2 μJ, the scanning speed is 120 mm / s, and the number of repeated scanning is 180 times.

[0039]Then without any other pretreatment, the electroless Ni-P plating experiment was carried out on the 4340 steel pretreated by femtosecond laser. After metallographic sample preparation, observe the combination of the cross section after pretreatment and electroless plating, such as Figure 4 shown. For the convenience of comparison, the untreated 4340 steel was electroless plated as a comparison sample, and the combination of the cross section is shown in figure 1 . It can be seen that the combination of the untreated 4340 steel electroless coating and the substrate is discontinuous, and some areas ar...

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Abstract

The invention belongs to the field of application of femtosecond laser technology, and particularly relates to a material surface femtosecond laser pretreatment method. According to the invention, a femtosecond laser is utilized to carry out irradiation pretreatment on the base which needs a layer or film on the surface, thereby obtaining a self-assembly-growth long-range nano microstructure on the surface. The chemical plating experiment on the micro / nano surface formed after the femtosecond laser treatment indicates that compared with the traditional chemical plating, the method provided by the invention saves the pretreatment steps of acid washing, alkali washing, activating and the like, and the bonding strength of the plated film and the base is higher than that of the surface which is not subjected to femtosecond laser pretreatment. The technique provided by the invention is simple, convenient, practical and pollution-free, can effectively substitute the pretreatment technique for a layer or membrane preparation technique, improves the bonding state of the layer base or film base, and enhances the bonding strength of the layer base or film base.

Description

technical field [0001] The invention belongs to the application field of femtosecond laser technology, in particular to a method for pretreatment of material surface by femtosecond laser. Background technique [0002] Surface engineering is to change the morphology, chemical composition, tissue structure and stress state of solid metal surface or non-metal surface through surface coating, surface modification or multiple surface technology composite treatment after surface pretreatment, so as to obtain the required surface performance systems engineering. Because it can obtain a coating with special properties such as wear resistance, corrosion resistance, fatigue resistance, high strength, stamping resistance, high temperature thermal barrier, etc. on the surface of cheap core materials, it has the characteristics of "low investment, high output", so in steel Materials, marine engineering, aerospace, automobile manufacturing, oil field chemical industry, instrumentation, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/09B23K26/00C23C4/18C23C8/80C23C10/60C23C14/58C23C16/56B23K26/352
Inventor 孙桂芳周瑞张永康张满奎冯爱新王昆丁吉
Owner JIANGSU UNIV
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