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A Strengthening Method of Optimized Combination of Laser Shock Strengthening and Shot Peening Strengthening

A technology of laser shock strengthening and shot peening, which is applied in the field of manufacturing equipment, can solve the problem that the improvement of fatigue life is not as good as that of laser shock strengthening, and achieve the effect of increasing the depth of residual stress field, high feasibility and good innovation

Active Publication Date: 2021-08-31
AIR FORCE UNIV PLA
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Problems solved by technology

The depth of residual stress field produced by laser shock strengthening is large, which can reach more than 0.9mm, while the depth of residual stress field produced by shot peening is small, generally not more than 0.3mm. The stress relaxation under cyclic loading is more obvious, and the improvement of fatigue life is not as good as that of laser shock strengthening

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  • A Strengthening Method of Optimized Combination of Laser Shock Strengthening and Shot Peening Strengthening
  • A Strengthening Method of Optimized Combination of Laser Shock Strengthening and Shot Peening Strengthening
  • A Strengthening Method of Optimized Combination of Laser Shock Strengthening and Shot Peening Strengthening

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] see Figure 1-3 , a strengthening method for optimizing the combination of laser shock strengthening and shot peening, which specifically includes the following steps:

[0029] S1: According to the national standard (GB / T3075-2008), the titanium alloy standard fatigue test piece is designed. The test piece is wire-cut, ground and polished, and the surface roughness is controlled below 0.3μm.

[0030] S2: Laser shock strengthening of titanium alloy is c...

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Abstract

The invention relates to the technical field of manufacturing equipment, and discloses a strengthening method for an optimized combination of laser shock strengthening and shot peening strengthening. The method includes the steps of: S1: designing a high-cycle fatigue titanium alloy test piece; laser shock strengthening of the titanium alloy; S3: shot peening of the titanium alloy test piece; S4: integrity test of the titanium alloy surface; S5: high cycle fatigue test of the titanium alloy; S6: parameter optimization. It has good innovation and combines the advantages of two surface technologies of laser shock strengthening and shot peening; the process is simple, and both laser shock strengthening technology and shot peening technology are mature technologies. Through reasonable control of strengthening parameters, titanium alloy components are strengthened. That is, the operation is simple and the feasibility is high; the strengthening effect is good. Through the high cycle fatigue test, the results show that the combined strengthening can significantly improve the high cycle fatigue life and fatigue limit of titanium alloy components, and has the advantages of good application prospects.

Description

technical field [0001] The invention relates to the technical field of manufacturing equipment, in particular to a strengthening method of an optimized combination of laser shock strengthening and shot peening strengthening. Background technique [0002] Titanium alloy has high specific strength, good corrosion resistance and thermal stability, and is widely used in the aerospace field. Fatigue is one of the main causes of failure of titanium alloy materials during service, and fatigue cracks often initiate on the surface, so the surface state has an important impact on the fatigue life. Surface modification of titanium alloy parts can effectively improve its high cycle fatigue strength and prolong its fatigue life. [0003] Laser Shock Peening (LSP for short) and Shot Peening (Shot Peening for SP) are two widely used surface modification technologies, each with its own advantages. The basic principle of laser shock strengthening is to use the mechanical effect of short pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18C22F3/00
CPCC22F1/183C22F3/00
Inventor 周留成时小松何卫锋李国杰王学德罗思海安志斌
Owner AIR FORCE UNIV PLA
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