A kind of preparation method of anti-oxidation coating on graphite surface
An anti-oxidation coating and graphite technology, which is applied in the field of materials, can solve problems such as unfavorable use, long cycle time, complex process of graphite anti-oxidation coating, etc., and achieve the effect of preventing oxidation and cracking
Active Publication Date: 2015-10-07
QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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Problems solved by technology
The graphite anti-oxidation coating prepared by this method is complicated, the control of various additives and the preparation process are cumbersome and the cycle is long, which is not conducive to continuous production.
Method used
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[0020] The embodiment of the present invention provides a method for preparing an anti-oxidation coating on the surface of graphite, which can be applied to the preparation of an anti-oxidation coating on the surface of graphite materials used in intermediate frequency induction heating equipment, such as the anti-oxidation coating of graphite materials used in amorphous strip production equipment. Oxidation coating preparation.
[0021] This preparation method comprises the steps:
[0022] Step 110, mix 30-45 parts by mass of SiC powder with 10-20 parts by mass of high-temperature glue, and mechanically stir evenly to obtain a SiC coating, and leave the stirred SiC coating for later use.
[0023] SiC powder is composed of β-SiC, a small amount of C, cristobalite and a small amount of ferrosilicon, in the form of powder, with a mesh number of 0-330 mesh and a density of 2.2g / cm 3 about. In a specific example, the composition of SiC powder is SiC≥90.0%, free C≤2.0%, Fe 2 o ...
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Abstract
The invention discloses a preparation method of an antioxidant coating on the surface of graphite. The preparation method comprises the following steps: mixing SiC powder of 30-40 parts by mass and high-temperature glue of 10-20 parts by mass, and uniformly stirring to obtain a SiC coating, and standing the SiC coating for later use; polishing and burnishing a graphite material, placing the polished graphite material into anhydrous ethyl alcohol for ultrasonic cleaning, cleaning with deionized water, and drying for later use; uniformly applying the SiC coating on the surface of the cleaned graphite material to form a primary coating; keeping the thickness of the applied and flattened primary coating to be 0.3-0.5 mm; placing the graphite material applied with the primary coating in a 120 DEG C baking oven to be baked for 2 hours; uniformly coating the SiC coating on the surface of the baked graphite material to form a secondary coating; adhering the secondary coating to the primary coating and ensuring that the total thickness of the primary coating and the secondary coating is 3-10 mm; placing the graphite material coated with the secondary coating in the 120 DEG C baking oven to be baked for 6-8 hours.
Description
technical field [0001] The invention relates to the field of material technology, in particular to a method for preparing an anti-oxidation coating on a graphite surface. Background technique [0002] Amorphous alloy strip is molten steel with 10 6 The formed ribbon is cooled at a rate of °C / s. The alloy with a certain composition ratio is melted in the furnace, after being calmed and kept warm by the tundish, it flows into the preheated spray bag, passes through a narrow gap at the bottom of the spray bag, flows to the rapidly rotating cooling roller, and rapidly cools into a solid state flung out to form an amorphous ribbon. Among them, the molten steel temperature plays an extremely important role. The temperature of the molten steel flowing to the cooling roll is directly affected by the heat preservation during the preheating of the spray ladle and the spraying process. If the temperature is too high or too low, the quality and performance of the amorphous strip will...
Claims
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IPC IPC(8): C09D5/08C04B41/50
Inventor 庞靖张雪松王玲
Owner QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD