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Centrifugal compound roller surface high-temperature-resistant coating and production process thereof

A centrifugal compounding and production process technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of easy peeling of the coating, roll area bumps, low coating adhesion, etc., and achieve excellent adhesion and fast curing , slow down the corrosive effect

Pending Publication Date: 2020-08-18
马鞍山市恒泰重工机械有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional furnace roll coating uses a coating composition system of CoCrAlY-CrB 2 / Y 2 o 3 , the spraying method is supersonic or plasma, because these two spraying methods have relatively large gaps in the coating, and the surface after spraying has not been treated in any way. Generally, after 2 to 3 months of use, there will be tumors on the roller surface, and due to the bonding force of the coating Lower, the coating is more likely to peel off

Method used

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  • Centrifugal compound roller surface high-temperature-resistant coating and production process thereof

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Experimental program
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Effect test

Embodiment 1

[0022] see figure 1 A high-temperature-resistant coating on the surface of a centrifugal composite roller, comprising the following ingredients in proportion by weight: tungsten carbide, cobalt base, boron nitride, chromium, cohesion reducing agent and solvent, the content of tungsten carbide is 20-38%, The cobalt base is 5-23%, the boron nitride is 7-15%, the chromium is 12-16%, the cohesion reducing agent is 7-11%, and the solvent is 15-25%. The solvent is DMF, TOL, MEK, EAC , IPA and water, the cohesion reducing agent is a low molecular weight polymer, such as aldehyde ketone resin and low molecular PE wax;

[0023] Tungsten carbide black hexagonal crystal, metallic luster, hardness similar to diamond, good conductor of electricity and heat, cobalt-based alloy, is a kind of cemented carbide resistant to various types of wear and corrosion and high temperature oxidation, cobalt-based The alloy is mainly composed of cobalt, containing a considerable amount of nickel, chromiu...

Embodiment 2

[0032] The content of tungsten carbide is 25-30%, cobalt base is 10-17%, boron nitride is 11-13%, chromium is 13-15%, cohesion reducing agent is 8-10% and solvent is 16-20%. .

[0033] Step 1: Accurately weigh each component: weigh 20-38% of tungsten carbide, 5-23% of cobalt base, 7-15% of boron nitride, 12-16% of chromium according to the proportion, reduce cohesion The auxiliary agent is 7-11% and the solvent is 15-25%;

[0034] Step 2: Pour tungsten carbide, cobalt base, and chromium into the reaction kettle, raise the temperature to 1300-1350°C, liquefy tungsten carbide, cobalt base, boron nitride, and chromium into molten metal at high temperature, and assemble the molten metal to high pressure In the atomization tower, under the action of high pressure, the metal liquid and the inert gas meet at the nozzle, and form powder particles after cooling. By increasing the atomization pressure, the speed of its atomization airflow is increased, and its surface and dynamic balan...

Embodiment 3

[0040] The content of tungsten carbide is 28%, cobalt base 14%, boron nitride 12%, chromium 14%, cohesion reducer 9% and solvent 18%.

[0041] Step 1: Accurately weigh each component: weigh 20-38% of tungsten carbide, 5-23% of cobalt base, 7-15% of boron nitride, 12-16% of chromium according to the proportion, reduce cohesion The auxiliary agent is 7-11% and the solvent is 15-25%;

[0042] Step 2: Pour tungsten carbide, cobalt base, and chromium into the reaction kettle, raise the temperature to 1300-1350°C, liquefy tungsten carbide, cobalt base, boron nitride, and chromium into molten metal at high temperature, and assemble the molten metal to high pressure In the atomization tower, under the action of high pressure, the metal liquid and the inert gas meet at the nozzle, and form powder particles after cooling. By increasing the atomization pressure, the speed of its atomization airflow is increased, and its surface and dynamic balance are destroyed. Complete secondary atomi...

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Abstract

The invention discloses a centrifugal compound roller surface high-temperature-resistant coating and a production process thereof, and belongs to the technical field of paint. The centrifugal compoundroller surface high-temperature-resistant coating comprises, by weight, 20%-38% of tungsten carbide, 5%-23% of cobalt bases, 7%-15% of boron nitride, 12%-16% of chromium, 7%-11% of a cohesion reduction auxiliary and 15%-25% of solvent. The tungsten carbide, the cobalt bases, the boron nitride, the chromium, the cohesion reduction auxiliary and the solvent are matched, the water injection cohesionreduction auxiliary and the solvent have a rapid solidification property and have excellent adhesive force at the same time, and by means of the stable performance, for effectively controlling the PHvalue, of the water injection cohesion reduction auxiliary, corrosion of the surface of a centrifugal compound roller can be slowed down, and cooperation with the high temperature resistance and thecorrosion resistance of the tungsten carbide, the cobalt bases and the chromium metal material is achieved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a high-temperature-resistant coating on the surface of a centrifugal composite roll and a production process thereof. Background technique [0002] The traditional furnace roll coating uses a coating composition system of CoCrAlY-CrB 2 / Y 2 o 3 , the spraying method is supersonic or plasma, because these two spraying methods have relatively large gaps in the coating, and the surface after spraying has not been treated in any way. Generally, after 2 to 3 months of use, there will be tumors on the roller surface, and due to the bonding force of the coating The lower the coating, the easier it is to peel off. In addition, many documents describe the addition of CrB in spray materials 2 , CrB 2 It is indeed helpful to fight against nodules, but CrB 2 Its melting point is relatively low, and it will generally decompose at about 800°C and form free boron. These boron will adhere...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F7/04B22F5/00C22C30/00
CPCB22F7/04B22F5/00C22C30/00B22F1/107
Inventor 陈道龙
Owner 马鞍山市恒泰重工机械有限公司
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