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A method of laser shock wave assisted ion infiltration into metal substrate

A metal matrix, shock wave technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of metal surface damage, easy initiation of fatigue cracks, affecting technology development, etc., to achieve uniform performance and accurate parameters. Controllable and solve the effect of spot overlap problem

Inactive Publication Date: 2012-02-22
JIANGSU UNIV
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Problems solved by technology

These laser surface modification technologies mainly use the thermal effect of the laser, which can improve the performance of the metal surface layer after treatment, but due to the thermal effect, the surface is in a state of tensile stress, which is prone to fatigue cracks, and the thermal effect can damage the metal surface layer. Influenced the further development of these technologies

Method used

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  • A method of laser shock wave assisted ion infiltration into metal substrate
  • A method of laser shock wave assisted ion infiltration into metal substrate
  • A method of laser shock wave assisted ion infiltration into metal substrate

Examples

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Embodiment

[0033] The following is an example of laser shock wave-assisted ion infiltration into a metal matrix. A laser generator is used to perform laser shock wave-assisted Al ion infiltration into a metal matrix on the surface of AM50 magnesium alloy. The ratio is reacted at 70-90°C for 20 minutes, and after cooling, a flexible film with a thickness of 2mm is formed. The Nd:glass laser with a repetition rate of 0.5 Hz has a spot diameter of 3 mm, a pulse energy of 15 J, a laser wavelength of 1054 nm, and a laser pulse width of 20 ns. The wear test was carried out on the UMT-2 micro-friction and wear test machine, using the ball-plane reciprocating dry friction method, and the test was carried out in the atmosphere and at room temperature, the room temperature was 18°C, and the relative humidity was 65%. The grinding pair is 440-C stainless steel ball with a diameter of 4 mm and a hardness of HRC 62, loaded with 0.1 N, stroke of 5 mm, reciprocating frequency of 1 Hz, and time of 20 mi...

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Abstract

The invention relates to the field of special processing, in particular to a method for laser shock wave-assisted ion infiltration into a metal matrix to change the element composition of the metal surface and enhance the performance of the surface metal, which is suitable for the processing of structural metal surfaces and friction pair surfaces that need to be strengthened. The present invention is characterized in that the laser is used to vaporize and ionize the flexible film of nanomaterials containing infiltrating elements on the metal substrate to generate ions that need to penetrate into the metal substrate, and under the action of shock waves, the ions are infiltrated into the surface of the metal substrate to change the surface. The content of the required elements of the metal, and the laser shock strengthening of the surface layer, the present invention can have the dual effects of changing the element composition of the metal surface layer and strengthening the metal surface layer.

Description

technical field [0001] The invention relates to the field of special processing, in particular to a method for laser shock wave-assisted ion infiltration into a metal matrix to change the element composition of the metal surface and enhance the performance of the surface metal, which is suitable for the processing of structural metal surfaces and friction pair surfaces that need to be strengthened. Background technique [0002] The surface properties of structural metals are crucial to the mechanical properties, fatigue properties and corrosion resistance of structural parts. At present, various surface modification technologies such as laser surface treatment, electron beam processing and ion implantation can greatly improve the surface properties of structural metals. , and can obtain excellent gain effects. [0003] Laser surface modification technology has the advantages of small thermal impact on the substrate and easy automation, such as US Patent US4613386, "Method of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/36C23C10/08
Inventor 鲁金忠罗开玉张朝阳张永康姜银方钟俊伟管海兵钱晓明
Owner JIANGSU UNIV
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