Title:
THIN-WALLED METAL MECHANICAL PROPERTY CHANGING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/109155
Kind Code:
A1
Abstract:
Disclosed is a thin-walled metal mechanical property changing method, comprising: step 1, fitting and assembling a workpiece and a workpiece substrate, and fixing the workpiece and the workpiece substrate on a precise movable platform; step 2, performing light spot path planning according to the surface topography of the workpiece; and step 3, using laser of which the power density is on the order of GW/cm2, the spot diameter is on the order of μm, and the pulse width is in the femtosecond scale to impact the surface of the workpiece, using explosive shock waves to modify the interior of the workpiece, and controlling the light spot to move along the light spot path, so that the light spot coverage rate of the surface of the workpiece is 300% or more. As the femtosecond laser is used to modify a thin-walled metal, the total amount of generated plasma is less, the peak pressure of the shock waves is higher, the acting force time is shorter, and the generated impact force, i.e., the impact momentum, is smaller, so that the thin-walled metal material generates dynamic yield response to generate microstructure change and a pre-stress field, but bending deformation is not prone to occurring; the purpose of changing mechanical properties of a thin-walled metal part is achieved.
Inventors:
HOU ZHIWEI (CN)
YU XINHAI (CN)
TU SHAN-TUNG (CN)
PAN JIAYU (CN)
ZHUANG PENG (CN)
ZHU WEIPING (CN)
QIAN XUHONG (CN)
YU XINHAI (CN)
TU SHAN-TUNG (CN)
PAN JIAYU (CN)
ZHUANG PENG (CN)
ZHU WEIPING (CN)
QIAN XUHONG (CN)
Application Number:
PCT/CN2022/112174
Publication Date:
June 22, 2023
Filing Date:
August 12, 2022
Export Citation:
Assignee:
UNIV EAST CHINA SCIENCE & TECH (CN)
HOU ZHIWEI (CN)
HOU ZHIWEI (CN)
International Classes:
C21D10/00; C22F3/00
Foreign References:
| CN114317938A | 2022-04-12 | |||
| CN108817675A | 2018-11-16 | |||
| CN101537534A | 2009-09-23 | |||
| US20060048867A1 | 2006-03-09 | |||
| CN104164554A | 2014-11-26 |
Other References:
TIAN, TIAN ET AL.: "Effect of Absorption Layer on Femtosecond Laser Shock Peening of Copper Foil", SURFACE TECHNOLOGY, vol. 50, no. 12, 2 August 2021 (2021-08-02), XP009547114, ISSN: 1001-3660
Attorney, Agent or Firm:
CHINA FARFIR INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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