Method for assembling nano Al2O3/TiO2 plating on cast aluminium surface using laser
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A laser and aluminum casting technology, which is applied in laser welding equipment, heating inorganic powder coating, manufacturing tools, etc., can solve the problems of loss and easy agglomeration of nanomaterials
Inactive Publication Date: 2007-05-02
SHANGHAI UNIV OF ENG SCI +1
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Problems solved by technology
However, due to the easy aggregation of nanomaterials, the above-mentioned "nanoeffect" may be lost during thermal action
Method used
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Embodiment 1
[0019] Embodiment 1. cast aluminum is ZL104, as coating base material, its composition is:
[0020] Si 8.0~10.5wt%
[0021] Mg 0.17~0.3Wt / %
[0022] Mn 0.2~0.5Wt / %
[0023] Al the rest
[0024] Laser assembly of nano-Al on the surface of the cast aluminum 2 o 3 / TiO 2 A coating method comprising the steps of:
[0025] The surface of ZL104 cast aluminum is polished by sandpaper first, and then cleaned with acetone before use;
[0026] ·On the surface of the cast aluminum to be used, thermal spray a Ni-clad Al alloy primer layer, ~0.05mm thick, and then spray a layer of (NF)Al 2 o 3 / TiO 2 , layer thickness ~ 0.12mm;
[0027] Coated on the surface of the pre-assembled coating to increase CO 2 Light-absorbing coatings with laser absorptivity;
[0028] CO 2 laser scanning. The laser processing machine used is HJ-3 type 2500WCW CO 2 laser machine. The incident laser power density is 2.04×10 4 W / cm 2 , the scanning speed is 40mm / s. Protected by Ar gas.
Embodiment 2
[0030] The incident laser power density is 5.03×10 3 W / cm 2
[0031] Laser scanning speed 30mm / s
[0032] Ni-clad Al bottom layer thickness 0.05mm
[0033] (NF)Al 2 o 3 / TiO 2 Layer thickness 0.05mm
[0034] Others are with embodiment 1.
Embodiment 3
[0036] The incident laser power density is 6.3×10 3 W / cm 2
[0037] Laser scanning speed 36mm / s
[0038] Ni wrapped Al 0.05mm
[0039] (NF)Al 2 o 3 / TiO 2 0.08mm
[0040] Others are with embodiment 1.
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Abstract
An aluminium casting surface nano Al#-[2]O#-[3] / TiO#-[2] plating layer laser assemble method is characterized as comprising the following steps: (1). surface cleaning treatment; (2) Granulating and assembling nano Al#-[2]O#-[3] / TiO#-[2]; (3) spraying and preassembly, first spraying a layer of Al-in-Ni then spraying a layer assembled nano Al#-[2]O#-[3] / TiO#-[2]; (4). coating a light absorption layer on preassembled coating; (5). under the argon shield, laser scanning to surface. The inventive method can prepare aluminium casting surface nano Al#-[2]O#-[3] / TiO#-[2] ceramic plating removing hole and crack assembled by laser, The plating layer bonding strength and abradability improves greatly relative to traditional hot spraying Al#-[2]O#-[3] / TiO#-[2] plating layer.
Description
Technical field: [0001] The present invention is related to surface strengthening treatment of cast aluminum, in particular to laser rapid assembly of nano-Al on the surface of cast aluminum 2 o 3 / TiO 2 Plating method. Background technique: [0002] Cast aluminum alloy (referred to as cast aluminum) has the characteristics of good casting performance, light weight, high electrical and thermal conductivity, and corrosion resistance. It is widely used in important industrial fields such as automobiles, aviation, and aerospace. However, due to the relatively low hardness and poor wear resistance of cast aluminum, the scope of application is limited. Many researchers have tried to modify it by surface treatment methods. Among them, plasma spraying ceramic coating on the surface of cast aluminum can significantly improve the wear resistance of cast aluminum, but this coating mainly exists in the form of metastable phase. It has a high porosity and a layered structure. There ...
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