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Laser shock strengthening method and thermostat under heating condition

A technology of laser shock strengthening and heating conditions, which is applied in heat treatment equipment, heat treatment process control, manufacturing tools, etc., to achieve the effect of improving stability

Inactive Publication Date: 2016-02-24
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to avoid the deficiencies of the prior art, the present invention proposes a laser shock strengthening method and a thermostat under heating conditions to solve the stability problems of the existing laser shock strengthening microstructure and residual compressive stress

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  • Laser shock strengthening method and thermostat under heating condition

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Embodiment Construction

[0023] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0024] In this embodiment, the thermostat 1 is made of red copper, and five temperature sensors 2 are installed 2mm below the surface of the four corners and the center, and an electric heater 3, temperature sensor 2 and electric heater 3 are installed at 4mm below each temperature sensor 2 Connected to the temperature controller 4.

[0025] The constrained layer is made of quartz glass 5, and a 0.1mm thick transparent plastic film 6 is pasted on the surface with self-adhesive to prevent the constrained layer material from breaking and splashing during the strengthening process.

[0026] The processed metal workpiece material in the present embodiment is 4140 steel, and processing method comprises the following steps:

[0027] Step 1: cleaning the dirty surface of the metal workpiece 7 with absolute ethanol;

[0028] Step 2: Put the metal workpiece 7 into an in...

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Abstract

The invention relates to a laser shock processing method under a heating condition and a thermostat. The method is characterized by comprising the steps of cleaning the surface of a processed metal workpiece with absolute ethyl alcohol; heating the metal workpiece, placing the metal workpiece on the thermostat, placing the quartz glass of a restraint layer on the metal workpiece and compressing; clamping the thermostat, the metal workpiece and the restraint layer as a whole; performing laser shock processing treatment by a light spot tangential lap-joint mode. Compared with the conventional laser shock processing treatment with the same laser parameters in terms of residual stress, fatigue property and thermal stability and cyclic stability of residual stress, by adopting the method provided by the invention, grains are denser, and the residual stress level is improved; the dislocation stability in thermal annealing and cyclic loading is improved.

Description

technical field [0001] The invention relates to the field of surface modification of metal materials, in particular to a laser shock strengthening method and a thermostat under heating conditions. Background technique [0002] Laser Shock Peening (LSP) utilizes high power density (10 9 W / cm 2 ), short-pulse (ns-level) laser irradiates the surface of metal materials, generates plasma shock waves and propagates to the interior, produces plastic deformation on the surface of the material, and simultaneously forms dense, stable dislocation structures and refined grains ("structural strengthening") mechanism), and retains a large residual compressive stress ("stress hardening" mechanism). This technology can effectively improve the mechanical properties of materials, especially significantly improve the fatigue resistance and stress corrosion resistance of materials. [0003] In the conventional laser shock peening technology, the severe plastic deformation of the metal materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/09C21D1/34C21D11/00
Inventor 汪诚安志斌孙冬赖志林
Owner AIR FORCE UNIV PLA