Modeling and calculation method of predicting material cross-section hardness after laser shock peening/processing (LSP)
A technology of laser shock strengthening and calculation method, which is applied in the direction of calculation, design optimization/simulation, special data processing application, etc., and can solve problems such as the inability to measure the hardness value of key components smoothly
Inactive Publication Date: 2018-02-09
JIANGSU UNIV
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Problems solved by technology
[0004] At present, in the promotion process of laser shock strengthening technology, the research on hardness is very important, but in practical application, we basically cannot measure the hardness value of the cross-section of key components after processing in actual conditions smoothly, so the present invention can give Provide a method for estimating the hardness value of the required section hardness value in engineering practice
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[0018] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, but the present invention should not be limited to the examples.
[0019] The target used in this implementation case is AM50 magnesium alloy with a shape of 30×20×3mm 3 The plate sample, specific dimensions such as image 3 shown.
[0020] (1) Select untreated AM50 magnesium alloy, randomly select 5 points on the base material to measure the hardness value, and obtain 5 hardness values: 67HV, 64HV, 65HV, 64HV, 65HV, take these 5 hardness values The mean value of the value H 0 = 65HV, as the hardness value of the base material;
[0021] (2) Randomly select key important components of AM50 magnesium alloy that have been treated by laser shock strengthening, and randomly select 5 points on its surface to measure the hardness value, and obtain N2 hardness values: 85HV, 83HV, 86HV, 82HV, 84HV , take the average H of these 5 d...
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The invention relates to the field of laser machining, and particularly to a modeling and calculation method of predicting material cross-section hardness after laser shock peening / processing (LSP). Asurface hardness value and a base-material hardness value after laser shock peening / processing in a general case are utilized to establish a calculation model of predicting the material cross-sectionhardness after laser shock peening / processing and obtain a calculation formula and the method, and thus a hardness value of a cross section after laser shock peening / processing is estimated. According to the method, approximate changing and a changing tendency of the hardness value of the processed cross section after laser shock peening / processing are obtained through calculation, an approximatehardness value of a surface under general laser shock peening / processing parameters can be calculated and obtained through the method, thus technology parameters of laser shock peening / processing canbe preliminarily determined before shock peening / processing according to surface hardness needing to be obtained, and improving economic benefits is realized; and a hardness value of an unprocessed surface after thin-plate single-surface shock peening / processing can also be estimated.
Description
technical field [0001] The invention relates to the field of laser processing, especially in terms of hardness requirements, and specifically refers to a modeling and calculation method for estimating the cross-sectional hardness of materials after laser shock strengthening. Background technique [0002] Laser shock peening / processing (LSP) is a new type of surface strengthening technology, mainly using short pulses (tens of nanoseconds), high peak power density (>10 9 W / cm 2 ) laser radiation on the metal surface, the laser beam passes through the constrained layer and is absorbed by the absorbing layer, and the absorbing layer obtains energy to form explosive gasification and evaporation, generating high temperature and high pressure plasma, due to the constraints of the outer constrained layer, the plasma forms a high pressure The shock wave propagates to the inside of the material, and plastic deformation occurs on the surface of the material by using the force effec...
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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 鲁金忠邓维维罗开玉
Owner JIANGSU UNIV