Device and method for laser shot blasting reinforcement of hard and brittle material

A technology of laser peening and hard and brittle materials, which is applied in the mechanical manufacturing and laser application fields of hard and brittle materials processing, to achieve the effect of suppressing microscopic cracks and impact lamination, avoiding the influence of material properties, and broadening the application field and application prospect

Inactive Publication Date: 2012-08-15
JIANGSU UNIV
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  • Device and method for laser shot blasting reinforcement of hard and brittle material
  • Device and method for laser shot blasting reinforcement of hard and brittle material
  • Device and method for laser shot blasting reinforcement of hard and brittle material

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[0038] combine Figure 1 ~ Figure 2 To describe in detail the specific implementation process and process characteristics of the inventive method:

[0039] Step 1. Sample pretreatment. In order to prevent the impact of residual oil on the strengthening effect of the workpiece, the degreasing treatment is carried out by heating or cleaning. The heating method is to heat the sample to 300-450°C, and the cleaning method can use alkaline solution or 99.7% alcohol solution to clean the surface of the sample.

[0040] An energy absorbing layer (3) is coated on the area of ​​the workpiece to be strengthened, and a transparent constraining layer (4) is fixed outside it. The energy absorbing layer (3) preferably chooses graphite coating, whose melting point is as high as 3850°C, and the absorption rate of graphite to laser light is as high as 77.3%. The confinement effect is 4 to 5 times that of ordinary glass.

[0041] Finally, clamp the processed sample on the workbench (1).

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Abstract

The invention discloses a device and a method for laser shot blasting reinforcement of a hard and brittle material, and relates to the field of mechanical manufacture of hard and brittle material processing and laser application. The device comprises a laser aid heating system, a laser shot blasting reinforcement system, a workpiece clamp system, a computer numerical control system, a measurementfeedback system and a protective gas circulating system. The method comprises a laser aid heating stage and a laser shot blasting reinforcement stage, namely performing aid heating treatment on the area to be reinforced by adopting high-power continuous laser, wherein for most metal materials, the plastic performance is improved along with the rise of temperature; and after the temperature of theheating area reaches a predetermined heating temperature, implementing laser shot blasting reinforcement treatment by adopting high-power pulse laser. The device and the method can implement the laser shot blasting reinforcement on the hard and brittle material so as to broaden the application range of the laser shot blasting reinforcement technology, and meanwhile compound the advantages of continuous laser and pulse laser so as to broaden the application field and the application prospect of laser manufacture.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing and laser application of hard and brittle materials, in particular to a method and special device for laser shot peening of hard and brittle materials. technical background [0002] In order to improve the performance and service life of mechanical parts, it is often necessary to carry out subsequent strengthening treatment on the machined surface. With the continuous maturity of high-power and high-performance laser technology, laser shot peening technology, as a new surface strengthening method, uses laser-induced shock waves for shock strengthening treatment, and has been applied in the surface modification of some important parts. US Patent No.4401477, titled "Laser Shock Process", introduces a laser shot peening method for surface modification of metal parts. Chinese invention patent application number 00112122.7, authorized announcement number CN113131325C, the patent name is "neodym...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D10/00
Inventor 黄舒周建忠杨小东王呈栋徐增闯胡玲玲
Owner JIANGSU UNIV
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