Method for reducing surface remained stress of high-power pulse laser cleaned metal
A metal surface, laser cleaning technology, applied in the direction of cleaning methods and utensils, chemical instruments and methods, etc., can solve the problem that there is no research on the evolution law of the cleaning surface, and achieve the effect of reducing residual stress and achieving remarkable results
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Embodiment 1
[0026] Step 1: Clean the rust layer on the surface of 45 steel with high-power short-pulse laser. The laser cleaning parameters are pulsed laser wavelength 1064nm, repetition frequency 10kHz, laser pulse width 80ns, and average power 500W. Focus the pulsed laser on the rusted surface, and scan once in S-shape reciprocatingly to obtain a clean 45 steel surface A.
[0027] Step 2: On the clean 45 steel surface A, spray about 10±2μm thick pure water, 4Wt% sodium orthosilicate and γ-glycidoxypropyltrimethoxysilane water base (mass ratio 1:1) to mix solution, 4wt% NaCl mixed solution, respectively to obtain 45 steel surface B1, B2, B3.
[0028] Step 3: Low-power laser scanning process parameters: pulsed laser wavelength 1064nm, repetition frequency 10kHz, laser pulse width 80ns, average power 50W, peak power density of pulsed laser 1.5×10 7 W / cm 2 . Using the above parameters, scan the surfaces of B1, B2, and B3 with the S-shaped path to obtain the surfaces of C1, C2, and C3, r...
Embodiment 2
[0034] Step 1: Clean the paint layer on the aluminum alloy surface with a high-power short-pulse laser. The laser cleaning parameters are pulsed laser wavelength 1064nm, repetition frequency 8kHz, laser pulse width 50ns, and average power 500W. Focus the pulsed laser on the surface of the paint layer, and scan it twice in an S-shaped reciprocating manner to obtain a clean aluminum alloy surface A.
[0035] Step 2: On the clean aluminum alloy surface A, spray about 10±2 μm thick pure water, containing 3Wt% sodium orthosilicate and γ-glycidyloxypropyltrimethoxysilane water base (mass ratio 1:2) The mixed solution and the water-based mixed solution containing 3wt% NaCl were used to obtain aluminum alloy surfaces D1, D2 and D3 respectively.
[0036] Step 3: Low-power laser scanning process parameters: pulsed laser wavelength 1064nm, repetition frequency 5kHz, laser pulse width 80ns, average power 100W, peak power density of pulsed laser 2.1×10 7 W / cm 2 . Using the above parame...
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