Preparation method of titanium and aluminium dissimilar metal thick plate overlapping structure
A technology of dissimilar metals and joining structures, applied in metal processing equipment, welding equipment, metal processing and other directions, can solve the problems of cracking and welding of cladding, difficult dissimilar metal structures, difficulties, etc., to achieve reliable structural quality, avoid direct contact, Simple and controllable preparation process
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[0024] Such as Figure 1-2 As shown, the present invention provides a method for preparing a titanium and aluminum dissimilar metal thick plate lap structure, which includes the following steps:
[0025] (1) The titanium alloy substrate 1 and the thin aluminum alloy cladding plate 2 are connected by explosive welding to obtain a composite plate, and the thickness of the thin aluminum alloy cladding plate is 1.5 to 3 mm;
[0026] (2) Friction stir welding is used to connect the composite plate obtained in the step (1) and the thick aluminum alloy clad plate 3 to obtain a lap structure of titanium and aluminum dissimilar metal thick plates; reference number 4 is a stirring head.
[0027] The thick aluminum alloy plate is connected to the thin aluminum alloy clad layer in the composite plate.
[0028] The present invention uses friction stir welding to connect the composite plate and the thick aluminum alloy plate obtained in the step (1) to obtain a step-by-step connection method of the...
Example Embodiment
[0050] Example 1
[0051] 1. Pretreatment before explosive welding: Use wire brush polishing to polish the side of the TC4 titanium alloy substrate with a thickness of 20mm and the side of the 2A12 thin aluminum alloy cladding with a thickness of 2mm to remove the titanium alloy substrate and aluminum. The oxide film on the surface of the alloy cladding plate; then use sandpaper to polish the surface of the grinding wheel to make the surface clean and smooth, and ensure that the surface roughness is Ra1.25-2.5μm; then clean the surface with absolute ethanol to ensure that the surface is clean.
[0052] 2. Explosive welding: place the processed titanium alloy substrate on a soft and flat sandy soil foundation, and place the processed thin aluminum alloy cladding plate on top of the titanium alloy; the prefabricated explosive frame Put it on the aluminum alloy in parallel; install and fix the discharge detonator at the corner of the explosive frame; use the electric detonator detonat...
Example Embodiment
[0057] Example 2
[0058] 1. Pre-treatment before explosive welding: Use wire brush polishing to polish the side of the TC4 titanium alloy substrate with a thickness of 30mm and the side of the 2A12 thin aluminum alloy cladding with a thickness of 2mm to remove the titanium alloy substrate and aluminum. The oxide film on the surface of the alloy cladding plate; then use sandpaper to polish the surface of the grinding wheel to make the surface clean and smooth, and ensure that the surface roughness is Ra1.25-2.5μm; then clean the surface with absolute ethanol to ensure that the surface is clean.
[0059] 2. Explosive welding: place the processed titanium alloy substrate on a soft and flat sandy soil foundation, and place the processed thin aluminum alloy cladding plate on top of the titanium alloy; the prefabricated explosive frame Put it on the aluminum alloy in parallel; install and fix the discharge detonator at the corner of the explosive frame; use the electric detonator detona...
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