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Magnetron laser bionic compound reinforcing method

A laser and magnetic control technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., to achieve the effect of good controllability, high processing flexibility, and elimination of fusion defects

Active Publication Date: 2014-07-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems existing in the existing methods, and to provide a magnetron laser bionic composite strengthening method, which comprehensively regulates the bionic strengthening area of ​​the surface of the metal material through the composite method of magnetron laser melting and laser shot peening. Microstructure and stress state, eliminate defects such as cracks, produce a synergistic effect of fine grain strengthening and stress strengthening, and further improve the performance of the bionic strengthening area, thereby significantly improving the surface properties of metal materials and promoting its engineering application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Polish the surface of RT300 cast iron with sandpaper, and clean the surface with alcohol;

[0023] 2) Perform magnetron laser biomimetic melting on the cast iron surface under a 0.5T rotating magnetic field. The laser energy is 0.5J, the pulse width is 1ms, the pulse frequency is 20HZ, the spot diameter is 1mm, and the scanning speed is 0.4mm / s. Striped bionic enhanced melting track;

[0024] 3) Attach 50 μm aluminum foil as the absorbing layer on the surface of the melting track, and use running water as the constraining layer;

[0025] 4) Laser peening is carried out along the melting track, and the laser power density is 1GW / cm 2 , the laser pulse width is 5 ns, the spot diameter is 1 mm, and the overlap rate is 20%, so that a composite strengthened biomimetic structure surface is obtained.

[0026] The microhardness and residual stress of the magnetron laser bionic composite strengthened zone and the laser bionic fusion strengthened zone were respectively measu...

Embodiment 2

[0028] 1) Polish the surface of 5CrMnMo steel with sandpaper, and clean the surface with alcohol;

[0029] 2) Perform magnetron laser biomimetic melting on the steel surface under a 2T rotating magnetic field. The laser energy is 10J, the pulse width is 20ms, the pulse frequency is 1HZ, the spot diameter is 0.5mm, and the scanning speed is 1mm / s to obtain discrete points Shaped bionic enhanced melting track;

[0030] 3) Apply black paint as an absorbing layer on the surface of the fusion track, and use running water as a constraining layer;

[0031] 4) Laser peening is carried out along the melting track, and the laser power density is 10GW / cm 2 , the laser pulse width is 40ns, the spot diameter is 0.5mm, and the overlap rate is 80%, and the composite strengthened biomimetic structure surface is obtained.

[0032] The microhardness and residual stress of the magnetron laser bionic composite strengthened zone and the laser bionic fusion strengthened zone were respectively mea...

Embodiment 3

[0034] 1) Polish the surface of 5A02 aluminum alloy with sandpaper, and clean the surface with alcohol;

[0035] 2) The surface of the aluminum alloy is subjected to magnetron laser bionic melting under a 1T rotating magnetic field. The laser energy is 5J, the pulse width is 10ms, the pulse frequency is 10HZ, the spot diameter is 0.7mm, and the scanning speed is 0.8mm / s. The grid-like bionics strengthens the melting track;

[0036] 3) Attach 20 μm aluminum foil as the absorbing layer on the surface of the melting track, and use running water as the constraining layer;

[0037] 4) Laser peening is carried out along the melting track, and the laser power density is 5GW / cm 2 , the laser pulse width is 25ns, the spot diameter is 0.7mm, and the overlap rate is 50%, and the composite strengthened biomimetic structure surface is obtained.

[0038] The microhardness and residual stress of the magnetron laser bionic composite strengthened zone and the laser bionic fusion strengthened...

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Abstract

The invention discloses a magnetron laser bionic compound reinforcing method and relates to surface modification of metal materials. The method includes the main steps of 1, polishing the surface of metal material with abrasive paper, and cleaning the surface with alcohol; 2, subjecting the surface of the metal material to magnetron laser bionic fusing so as to obtain a bionic reinforcement fusing track; 3, setting an absorbing layer and a restraint layer on the fusing track; 4, subjecting the fusing track to laser shot-peening so as to obtain the compound reinforced bionic structured surface. The magnetron laser bionic compound reinforcing method combining magneto-stirring effect has the advantages in laser thermal effect; the bionic reinforced structure is made on the surface of the metal material; microstructure and residual stress of a bionic reinforced area are comprehensively controlled, the compound reinforcing effect of fine crystal strengthening and stress strengthening is produced, and the properties of the metal material such as surface wear resistance and fatigue resistance are significantly improved. The magnetron laser bionic compound reinforcing method with simple process is easy to operate and suitable for large-scale batch production.

Description

technical field [0001] The invention relates to the technical field of metal material surface modification, in particular to a magnetron laser bionic compound strengthening method. Background technique [0002] Metal parts often fail due to wear or fatigue during engineering applications, and these failure modes usually originate from the surface. Therefore, it is very important to improve the wear resistance and fatigue resistance of the surface of metal parts to prolong their service life, which will generate huge economic and social benefits and improve the safety of engineering applications. [0003] Surface modification is an effective method to improve the surface properties of parts. At present, many surface modification methods have been developed. Most of these methods improve the surface properties of materials by changing the overall composition and structure of the material surface. With the development of bionic technology, people began to prepare bionic struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/352B23K26/70
CPCB23K26/352B23K26/60
Inventor 崔承云崔熙贵周建忠许晓静姜银方
Owner JIANGSU UNIV
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