Antioxidant coating applied to high-temperature alloy heat treatment
A technology for anti-oxidation coatings and high-temperature alloys, which is applied in the field of high-temperature anti-oxidation coatings, can solve the problems of high price of anti-oxidation coatings, easy to fall off, and the anti-oxidation performance of coatings needs to be improved, and achieves increased strength, anti-oxidation, and adhesion. Good and good antioxidant effect
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Embodiment 1
[0034] Paint ratio by weight percentage: 88% mid-grade magnesia, 3.8% pigment grade Cr 2 o 3 ,; 3% industrial aluminum powder, 4% sodium tripolyphosphate, 0.2% graphite powder, 1% Fe 2 o 3 . Then add sodium polyacrylate, 4% colloidal silica, and 15% water, accounting for 4% of the mass of the above-mentioned solid powder.
[0035] Coating process: Spray the paint onto the surface of the billet with a pressure spray gun. The temperature of the billet is preferably above 100°C, so that the coating can dry quickly and form a film. The thickness of the sprayed coating is measured by a thickness gauge at 0.8-1.5mm, and the minimum thickness cannot be less than 0.5mm. The substrate does not require any pre-treatment, and there is no need to remove the oxide skin on the surface. The oxide skin on the surface can promote the formation of a protective coating at high temperatures.
[0036] Heating conditions: use a silicon molybdenum rod heating furnace, heat up to 1400°C in 2 hou...
Embodiment 2
[0038] Paint ratio: 89.9% mid-grade magnesia, 2.5% pigment grade Cr 2 o 3 ,; 2% industrial aluminum powder, 4.5% sodium tripolyphosphate, 1% Fe 2 o 3 , 0.1% graphite powder. Then add sodium polyacrylate, 5% colloidal silica, and 15% water, accounting for 4% of the mass of the above-mentioned solid powder.
[0039] Coating process: The coating is sprayed onto the surface of the steel slab with a pressure spray gun, the thickness is about 1mm, dried at room temperature or the temperature of the cast slab is above 100°C, the substrate temperature promotes drying and film formation, and the sprayed thickness is measured by a thickness gauge at 0.8 ~1.5mm, the minimum thickness cannot be less than 0.5mm.
[0040] Substrate: There is no need for any pre-treatment, and no need to remove the oxide skin on the surface.
[0041] Heating equipment: In the walking beam heating furnace, water vapor is the atomizing medium and heavy oil is the fuel.
[0042] Heating conditions: 1350℃~...
Embodiment 3
[0045] Coating ratio: 90% mid-grade magnesia, 1.5% pigment grade Cr 2 o 3 , 2.5% Pigment Grade Fe 2 o 3 , 2.5% industrial aluminum powder, 3.4% sodium tripolyphosphate, 0.1% graphite powder, then add sodium polyacrylate accounting for 4% of the above-mentioned solid powder mass, 5% colloidal silica, and 15% water.
[0046] Coating process: Coat the paint on the low-carbon alloy steel slab with a thickness of about 1mm, dry it at room temperature or the casting slab at a temperature above 100°C, spray it on the surface of the substrate, and dry it with the temperature of the substrate to form a film. The thickness of the spray coating measured by the thickness gauge is 0.8-1.5mm, and the minimum thickness cannot be less than 0.5mm.
[0047] Substrate: There is no need for any pre-treatment, and no need to remove the oxide skin on the surface.
[0048] Heating equipment: silicon molybdenum rod heating furnace, in the environment of air as the medium.
[0049] Heating condit...
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