Method of Stress Corrosion Resistance of Stainless Steel Welded Joints by Nanosecond Pulse Laser Shock
A nanosecond pulse laser and laser shock technology, which is applied in the direction of furnaces, furnace types, heat treatment equipment, etc., can solve the problems of stress corrosion resistance degradation and other problems, and achieve the effect of easy automation, fast processing speed and automatic realization
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Embodiment 1
[0029] This embodiment is a process for resisting stress corrosion of stainless steel welded joints subjected to nanosecond pulse laser shock. The test pieces in this example are 316L stainless steel welded joints.
[0030] The specific steps are:
[0031] Step 1, Paste the absorbing protective layer. Aluminum foil with a thickness of 0.05mm to 0.1mm is used as the absorbing protective layer. Paste the aluminum foil on the surface of the weld seam of the test piece and in the area of 7mm on both sides of the weld seam, the thickness of the aluminum platinum is ≤0.1mm.
[0032] In this embodiment, the sticking thickness of the absorbing protective layer is 0.05 mm.
[0033] Step 2, forming a constraint layer. A deionized water layer with a thickness of 1 mm to 2 mm is formed on the surface of the absorbing protective layer as a constrained layer by conventional methods and maintained.
[0034] Step 3, laser shock weld. The weld seam is impacted with a nanosecond pulsed ...
Embodiment 2
[0047] This embodiment is a process for resisting stress corrosion of stainless steel welded joints subjected to nanosecond pulse laser shock. The test pieces in this example are 304 stainless steel welded joints.
[0048] The specific steps are:
[0049] The specific steps are:
[0050] Step 1, Paste the absorbing protective layer. Aluminum foil with a thickness of 0.05mm to 0.1mm is used as the absorbing protective layer. Paste the aluminum foil on the surface of the weld seam of the test piece and in the area of 6mm on both sides of the weld seam, the thickness of the aluminum platinum is ≤0.1mm.
[0051] In this embodiment, the sticking thickness of the absorbing protective layer is 0.1 mm.
[0052] Step 2, forming a constraint layer. A deionized water layer with a thickness of 1 mm to 2 mm is formed on the surface of the absorbing protective layer as a constrained layer by conventional methods and maintained.
[0053] Step 3, laser shock weld. The weld seam is im...
Embodiment 3
[0066] This embodiment is a process for resisting stress corrosion of stainless steel welded joints subjected to nanosecond pulse laser shock. The test pieces in this example are 304 stainless steel welded joints.
[0067] The specific steps are:
[0068] The specific steps are:
[0069] Step 1, Paste the absorbing protective layer. Aluminum foil with a thickness of 0.05mm to 0.1mm is used as the absorbing protective layer. Paste the aluminum foil on the surface of the weld seam of the test piece and in the area of 7mm on both sides of the weld seam, the thickness of the aluminum platinum is ≤0.1mm.
[0070] In this embodiment, the sticking thickness of the absorbing protective layer is 0.08mm.
[0071] Step 2, forming a constraint layer. A deionized water layer with a thickness of 1 mm to 2 mm is formed on the surface of the absorbing protective layer as a constrained layer by conventional methods and maintained.
[0072] Step 3, laser shock weld. The weld seam is im...
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