Mew method for increasing laser boring depth of stainless steel

A laser drilling, stainless steel technology, applied in laser welding equipment, metal processing equipment, welding equipment and other directions, can solve the problems of low photoelectric conversion efficiency, low laser processing efficiency, huge power consumption, etc., to achieve less energy consumption, processing High efficiency and the effect of increasing the drilling depth

Inactive Publication Date: 2015-09-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most lasers are driven by electricity, the photoelectric conversion efficiency is not high, and the laser processing efficiency is low

Method used

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  • Mew method for increasing laser boring depth of stainless steel
  • Mew method for increasing laser boring depth of stainless steel
  • Mew method for increasing laser boring depth of stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A new method to increase the depth of stainless steel laser drilling, including the following steps:

[0038] (1) Stainless steel pretreatment: grinding, polishing, ultrasonic cleaning and drying treatment on the surface of 304 stainless steel;

[0039] (2) Preparation of gold nanoparticles: add 1.7ml of 0.01g / ml chloroauric acid aqueous solution to 50ml of water, use oil bath method to heat to boiling and keep for 10min, then add 38.8mmol / L sodium citrate 2.25ml, Heating and stirring at a speed of 10 r / s for 15 min, to obtain the gold nanoparticle solution with a particle diameter of 40 nm and an absorption wavelength of 532 nm.

[0040] (3) Self-assembly of gold nanoparticles on the surface of stainless steel: Use a pipette to take 2.0ml of 97% 3-aminopropyltrimethoxysilane (APTMS) solution and dissolve it in 50ml of methanol to configure it as APTMS- Methanol solution: The stainless steel treated in step (1) is soaked in the APTMS-methanol solution for 12 hours and then ta...

Embodiment 2

[0048] Step (1) to step (3) are the same as in Example 1,

[0049] Step (4) Laser drilling: laser drilling is performed on the surface of the self-assembled stainless steel in step (3), and the wavelength parameter of the laser is the same as the absorption wavelength of the gold nanoparticles; other laser parameters are set to the laser frequency of 1KHz , Wavelength 532nm, pulse width 500ms, laser energy 80uJ, and 5 pulses.

[0050] (5) Stainless steel post-treatment: The stainless steel surface with holes is washed twice in an ultrasonic cleaner with alcohol and acetone alternately on the surface of the stainless steel after step (4), and dried to obtain the stainless steel with holes.

[0051] We analyze the morphology and depth of the holes obtained in Example 2, as Figure 5 As shown, the pits have an obvious tapered structure with multiple recast layers. We further measured the hole depth, such as Image 6 As shown, the depth of the hole is 4.45 μm.

Embodiment 3

[0056] Step (1) to step (3) are the same as in Example 1,

[0057] Step (4) Laser drilling: laser drilling is performed on the surface of the self-assembled stainless steel described in step (3), and the wavelength parameter of the laser is the same as the absorption wavelength of the gold nanoparticles; other laser parameters are set to laser frequency 1KHz , Wavelength 532nm, pulse width 500ms, laser energy 120uJ, pulse number 1.

[0058] (5) Stainless steel post-treatment: The stainless steel surface with holes is washed twice in an ultrasonic cleaner with alcohol and acetone alternately on the surface of the stainless steel after step (4), and dried to obtain the stainless steel with holes.

[0059] We analyze the morphology and depth of the holes obtained in Example 2, as Picture 9 As shown, the pit has an incomplete cone structure with a recast layer around it. We further measured the hole depth, such as Picture 10 As shown, the depth of the hole is 1.62 μm.

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Abstract

The invention provides a new method for increasing laser boring depth of stainless steel. The new method comprises the steps that 1 pretreatment is conducted on the stainless steel; 2 gold nanoparticle solution is prepared; 3 self-assembly of gold nanoparticles on the surface of the stainless steel is conducted: the APTMS is prepared into APTMS-methanol solution, the processed stainless steel is socked into the APTMS-methanol solution, the stainless steel is taken out and is washed with deionized water, the stainless steel is soaked into the gold nanoparticle solution, and then the stainless steel is taken out and dried for use later; 4 laser boring is conducted: laser boring is conducted on the surface of the self-assembly stainless steel, and the wave length of the laser is same to that of the absorbing wave length of the gold nanoparticles; 5 aftertreatment on the stainless steel is conducted. According to the new method for increasing laser boring depth of stainless steel, a gold nanoparticle layer is self assembled on the surface of the stainless steel, then laser treatment is conducted, and the temperature of a boring position is increased rapidly, so that the boring depth is increased. The new method for increasing laser boring depth of the stainless steel has the advantages that the operating procedures are simple, the energy consumption is little, the processing efficiency is high, and the repeating performance is high.

Description

Technical field [0001] The invention belongs to the technical field of laser processing, and particularly relates to a new method for increasing the laser drilling depth of stainless steel. Background technique [0002] Laser drilling is a practical laser processing technology as early as the early 19th century, and it is also one of the main application areas of laser processing. Due to the rapid development of industry and science and technology, materials with high hardness and high melting point are used more and more widely, and the fine processing of such materials is also urgent. However, the processing of this type of material is difficult or even impossible to achieve with traditional mechanical processing methods, which can be solved by laser drilling technology. Laser drilling uses a high-energy laser beam with a high power density to instantaneously act on the material. The pulse time is extremely short and the drilling speed is very fast. Combining high-efficiency ...

Claims

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Application Information

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IPC IPC(8): B23K26/382B23K26/60
Inventor 吕柳张旭吴禹仝旋许孝芳任乃飞
Owner JIANGSU UNIV
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