A medium temperature insulating anti-torque coating and coating method thereof
A technology of anti-torque and medium temperature, which is applied in the direction of coating, metal material coating process, molten spraying, etc., can solve the problems of poor anti-torque performance, achieve the effect of enhanced bonding strength, avoiding falling off, and enhancing service life
Active Publication Date: 2018-12-21
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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Problems solved by technology
[0003] In order to solve the problem of poor anti-torque performance of existing ceramic coatings, the present invention provides a medium-temperature insulating anti-torque coating and its coating method, which not only has excellent medium-temperature insulating performance, but also has good medium-temperature anti-torque ability, and can Effectively prevents the ceramic coating from falling off the surface of the metal part during torque fit
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Embodiment 1
[0048] Adopt the coating method of medium-temperature insulating torque-resistant coating described in the above-mentioned technical scheme to carry out the coating of the gear of A3 steel that the material of a certain Rockwell hardness reaches HRC55 is coated, and its specific steps include:
[0049] Step a', pretreatment: clean the surface of the gear, and use brown corundum with a particle size of 20 mesh as sand material, under the conditions of sandblasting air pressure of 0.8MPa, sandblasting angle of 45°, and sandblasting distance of 145mm Next, sandblasting is performed on the surface of the gear, so that the roughness of the gear surface reaches 4 μm.
[0050] Step b', primer coating: spray nickel-chromium powder with a particle size between 40 and 70 μm on the surface of the metal substrate 1 by using a plasma spraying process, the powder feeding rate of the plasma spraying equipment is 30g / min, and the plasma spraying power is 47kW , the spraying distance is 130 mm...
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Abstract
The invention discloses a medium-temperature insulation anti-torque coating and a coating method thereof. The medium-temperature insulation anti-torque coating is formed by compositing a bottoming layer (2) and a medium-temperature insulation ceramic coating (3), and the bottoming layer (2) is arranged between the surface of a metal substrate (1) and the medium-temperature insulation ceramic coating (3), wherein the thickness of the medium-temperature insulation ceramic coating (3) ranges from 100 micrometers to 200 micrometers; the thickness of the bottoming layer (2) ranges from 80 micrometers to 120 micrometers, and the bottoming layer (2) is made of nickel-chromium or nickel-aluminum or nickel-chromium-aluminum. The coating method for the medium-temperature insulation anti-torque coating sequentially comprises the steps of pretreatment, coating of the bottom layering and coating of the medium-temperature insulation ceramic coating. The medium-temperature insulation anti-torque coating in the embodiment has the excellent medium-temperature insulation performance, has the good medium-temperature anti-torque capacity, and can effectively prevent the ceramic coating from being disengaged from the surface of a metal part during torque matching.
Description
technical field [0001] The invention relates to the technical field of medium-temperature insulating coatings, in particular to a medium-temperature insulating anti-torque coating and a coating method thereof. Background technique [0002] In order to improve the insulating performance of the surface of metal parts, the method of coating insulating coating on the surface of metal parts is usually adopted. For example, ceramic coating is a medium-temperature insulating coating often used on the surface of metal parts. However, the inventors of the present application found that: the torque resistance of the existing ceramic coating is not very ideal, and the ceramic coating on the surface of the metal part will fall off during torque fitting, so that the surface of the metal part loses its insulation. Contents of the invention [0003] In order to solve the problem of poor anti-torque performance of existing ceramic coatings, the present invention provides a medium-temperat...
Claims
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IPC IPC(8): C23C4/02C23C4/10C23C4/12C23C4/18
CPCC23C4/02C23C4/18
Inventor 沈婕卢晓亮侯伟骜冀晓鹃国俊丰万伟伟
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY