A process for improving the thermal fatigue performance of aluminum alloy materials
A technology of aluminum alloy materials and process methods, applied in the direction of metal material coating process, coating, etc., can solve the problem that the cladding layer is easy to fall off, affects the improvement of the thermal fatigue performance of aluminum alloys, and affects the effect of laser cladding layers on aluminum alloys. Surface strengthening effect and other issues to achieve the effect of expanding the application field and improving thermal fatigue performance
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Embodiment 1
[0026]The aluminum alloy is selected from commercially available A356 cast aluminum alloy. The strengthening treatment is carried out according to the following steps: step (1): blackening treatment on the surface of the aluminum alloy. First sanded and polished, then immersed in 8% NaOH solution and etched for 3 min to remove the surface Al 2 o 3 Contaminants such as films and other oil stains are finally cleaned with alcohol and then air-dried for later use; step (2): preparation of cladding powder. The chemical composition of Ni-based powder is calculated by mass percentage, Cr is 13%, Si is 3%, Ti is 2%, B is 2%, Y 2 o 3 3%, CeO 2 3%, La 2 o 3 2%, Nd 2 o 3 is 1%, Co is 1%, C is 0.5%, Mn is 0.5%, SrO is 0.1%, Fe is 2%, and the balance is Ni. Grinding and mixing the above powder in a vacuum ball mill for 10 minutes, the particle size of the powder is 250-400 mesh, and the shape is spherical or nearly spherical; step (3): laser cladding process. The fiber laser is u...
Embodiment 2
[0029] The aluminum alloy is selected from commercially available A356 cast aluminum alloy. The strengthening treatment is carried out according to the following steps: step (1): blackening treatment on the surface of the aluminum alloy. First sanded and polished, and then immersed in 10% NaOH solution for 2 min to remove the surface Al 2 o 3 Contaminants such as films and other oil stains are finally cleaned with alcohol and then air-dried for later use; step (2): preparation of cladding powder. The chemical composition of Ni-based powder is calculated by mass percentage, Cr is 18%, Si is 5%, Ti is 3%, B is 3%, Y 2 o 3 4%, CeO 2 4%, La 2 o 3 3%, Nd 2 o 3 2%, Co 3%, C 0.8%, Mn 0.8%, SrO 0.3%, Fe 8%, and the balance Ni. Grinding and mixing the above powder in a vacuum ball mill for 30 minutes, the particle size of the powder is 150-300 mesh, and the shape is spherical or nearly spherical; step (3): laser cladding process. The fiber laser is used to carry out laser cla...
Embodiment 3
[0032] The aluminum alloy is selected from the commercially available 7075 deformed aluminum alloy. The strengthening treatment is carried out according to the following steps: step (1): blackening treatment on the surface of the aluminum alloy. First sanded and polished, then immersed in 8% NaOH solution and etched for 3 min to remove the surface Al 2 o 3 Contaminants such as films and other oil stains are finally cleaned with alcohol and then air-dried for later use; step (2): preparation of cladding powder. The chemical composition of Ni-based powder is calculated by mass percentage, Cr is 13%, Si is 3%, Ti is 2%, B is 2%, Y 2 o 3 3%, CeO 2 3%, La 2 o 3 2%, Nd 2 o 3 is 1%, Co is 1%, C is 0.5%, Mn is 0.5%, SrO is 0.1%, Fe is 2%, and the balance is Ni. Grinding and mixing the above powder in a vacuum ball mill for 10 minutes, the particle size of the powder is 250-400 mesh, and the shape is spherical or nearly spherical; step (3): laser cladding process. The fiber l...
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