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Metal Surface Treatment Method Combining Ultrasonic Impact and Surface Delamination

A technology of metal surface treatment and ultrasonic impact, applied in the field of metal surface treatment, to achieve the effect of strengthening residual compressive stress, simple operation and strong practicability

Active Publication Date: 2022-02-11
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a metal surface treatment method combining ultrasonic impact and surface delamination, which overcomes the defects of the existing ultrasonic impact method and breaks through the bottleneck of the prior art

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  • Metal Surface Treatment Method Combining Ultrasonic Impact and Surface Delamination
  • Metal Surface Treatment Method Combining Ultrasonic Impact and Surface Delamination
  • Metal Surface Treatment Method Combining Ultrasonic Impact and Surface Delamination

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Embodiment

[0042] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, wherein the specific embodiments and descriptions are only used to explain the present invention, but are not intended to limit the present invention.

[0043] The metal plate involved in this embodiment is magnesium alloy AZ31B, the size of the plate is 300×40×10, and the ultrasonic impact equipment used is the HJ-III ultrasonic impact equipment developed by Tianjin University Welding Engineering Research Institute. The schematic diagram of the equipment is as attached figure 1 As shown, the mains power is converted into high-frequency high-voltage alternating current through the ultrasonic generator 1, and the ultrasonic transducer 2 converts the input electric energy into mechanical energy, that is, ultrasonic waves. The input amplitude is amplified through the horn 3, and the ultrasonic shock needle is simultaneously ...

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Abstract

The invention relates to a metal surface treatment method combining ultrasonic impact and surface delamination, and belongs to the technical field of metal surface treatment. Ultrasonic impact is used for metal surface treatment, and a plastic deformation layer and a surface transition layer appear. After the ultrasonic impact treatment, the surface is evenly ground with sandpaper until the surface plastic deformation layer is completely removed, so as to remove the microcracks existing in an ultrasonic impact. , Immediately carry out a second ultrasonic impact on the metal surface, the impact part is the surface transition layer after the first ultrasonic impact, further strengthen the effect of grain refinement, deepen the thickness of the grain refinement layer, and strengthen the effect of residual compressive stress. The advantage is that: through ultrasonic impact and surface delamination composite treatment, the effect of ultrasonic impact grain refinement can be further enhanced, the thickness of the surface plastic deformation layer can be deepened, and the effect of residual compressive stress can be strengthened. Simple operation, low cost, green and energy saving. Strong practicality.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a metal surface treatment method combining ultrasonic impact and surface delamination. A method for improving the fatigue performance of magnesium alloys by using ultrasonic shock and secondary ultrasonic shock after removing the surface deformation layer. Background technique [0002] Magnesium alloy is the lightest structural material, has the advantages of high specific strength and specific stiffness, good cutting performance, etc., and is widely used in aerospace, communication and other fields. Some high-performance wrought magnesium alloy products have replaced traditional ferrous metal load-bearing moving parts, such as aviation wheels or hubs, helicopter propellers, gearboxes, engine forged pistons, etc. Even within the safe working range of the static allowable stress, the complex service environment and long-term alternating loads will still cause fati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D7/04C22F1/06C22F1/00
CPCC21D7/04C22F1/06C22F1/00
Inventor 赵小辉王岩刘宇张文强王浩张慧婧
Owner JILIN UNIV
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