CN110592519A - Preparation method of high-temperature-resistant material for boiler - Google Patents
Preparation method of high-temperature-resistant material for boiler Download PDFInfo
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- CN110592519A CN110592519A CN201911039716.1A CN201911039716A CN110592519A CN 110592519 A CN110592519 A CN 110592519A CN 201911039716 A CN201911039716 A CN 201911039716A CN 110592519 A CN110592519 A CN 110592519A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
Abstract
The invention discloses a preparation method of a high-temperature resistant material for a boiler, and particularly relates to the field of high-temperature resistant materials, wherein the used raw materials (in parts by weight) comprise: 40-60 parts of nickel, 8-14 parts of chromium, 5-8 parts of cobalt, 12-14 parts of cubic boron nitride, 2-3 parts of nano ceramic fiber, 2-3 parts of zirconia fiber, 12-14 parts of modified expandable graphite, 2-3 parts of a reflective coating, 2-3 parts of a solid lubricant and 4-6 parts of a ceramic adhesive; the preparation method comprises the following steps: s1, primary processing of raw materials; s2, mixing materials; s3, processing a substrate; s4, primary spraying processing; s5, secondary spraying processing; and S6, cooling. According to the invention, the processing technology combining the thermal spraying technology and the etching technology is adopted, the coating is respectively sprayed twice, cooling and honeycomb texture treatment are carried out after each spraying, and the coating is matched with the nano ceramic fibers and the zirconia fibers with anti-cracking and anti-falling effects, so that the boiler coating has higher strength and is less prone to falling and cracking.
Description
Technical Field
The invention relates to the technical field of high-temperature-resistant materials, in particular to a preparation method of a high-temperature-resistant material for a boiler.
Background
The main working principle of the boiler is that heat energy released after fuel combustion or waste heat in industrial production is transferred to water in a container to make the water reach required temperature or certain pressure steam, and the thermodynamic equipment has the advantages of strong fuel adaptability, high combustion efficiency and the like. When fuel burning, the fuel granule flows in the combustion chamber ceaselessly because the effect of gravity, all can make the surface of furnace body be heated and worn seriously, and there is certain inhomogeneity in the angle of scouring away and the direction of fuel granule on the furnace body face simultaneously to lead to the not only bottom of furnace body to be heated and worn seriously, the furnace body lateral wall also all has the heated wear of certain degree moreover.
In the prior art, the heat-resistant treatment of the surface of a boiler is generally to coat a high-temperature-resistant coating on the surface of a furnace body, the high-temperature-resistant coatings coated on the surfaces of the inner wall and the outer wall of the boiler are easy to peel off and lose efficacy under the scouring action of fuel particles and under the conditions that the interior is collided with processed articles for a long time and the like, when the coatings on the inner wall and the outer wall peel off or are damaged, the coatings can be coated again, but the time and the labor are wasted, the construction period is delayed, the working efficiency of the boiler is influenced, or the boiler is directly replaced.
Therefore, in order to solve the above problems, it is necessary to invent a high temperature material capable of being directly coated on the inner and outer walls of the boiler and a method for preparing the high temperature material, so as to solve the above technical problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a preparation method of a high-temperature-resistant material for a boiler, wherein a thermal spraying technology and an etching technology are combined to process the coating, the coating is sprayed twice respectively, cooling and honeycomb texture processing are carried out after each spraying, and the nano ceramic fiber and the zirconia fiber with anti-cracking and anti-shedding effects are matched for use, so that the boiler coating has higher strength and is less prone to shedding and cracking.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a high-temperature resistant material for a boiler comprises the following steps of: 40-60 parts of nickel, 8-14 parts of chromium, 5-8 parts of cobalt, 12-14 parts of cubic boron nitride, 2-3 parts of nano ceramic fiber, 2-3 parts of zirconia fiber, 12-14 parts of modified expandable graphite, 2-3 parts of a reflective coating, 2-3 parts of a solid lubricant and 4-6 parts of a ceramic adhesive.
In a preferred embodiment, the reflective coating is in particular a white reflective coating XZ-T003.
In a preferred embodiment, the solid lubricant is in particular molybdenum disulphide.
The invention also provides a preparation method of the high-temperature-resistant material for the boiler, which comprises the following specific processing steps:
s1, primary processing of raw materials: adding nickel, chromium, cobalt, cubic boron nitride, modified expandable graphite and a solid lubricant into a stirring tank in proportion to obtain a basic mixed material, and then adding the basic mixed material into a ball mill for grinding to obtain basic powder particles for later use;
s2, mixing materials: uniformly mixing the basic powder particles obtained in the step S1 with the nano ceramic fibers, the zirconia fibers, the reflective coating and the ceramic adhesive to obtain a finished sprayed powder product;
s3, treating a substrate, cleaning the surface of the boiler substrate, processing the inner wall and the outer wall of the substrate into surfaces with honeycomb textures by adopting an etching process after cleaning, and then cleaning and cooling;
s4, primary spraying: spraying the spraying powder prepared in the step S2 on the surface of the substrate with the honeycomb texture obtained in the step S3 by adopting a thermal spraying technology to form a bottom layer, and cooling to normal temperature;
s5, secondary spraying: processing the coating on the inner wall and the outer wall of the substrate into a coating surface with honeycomb textures by adopting an etching process, and continuously spraying powder on the coating surface with the honeycomb textures by adopting a thermal spraying technology to form a surface layer;
s6, cooling: and naturally cooling the boiler surface layer obtained in the step S5 to obtain the high-temperature-resistant boiler inner and outer wall coating.
In a preferred embodiment, in the step S1, the stirring linear speed of the base material is 1-5m/S, and the stirring time is 20-30 min.
In a preferred embodiment, in the step S2, the stirring linear speed of the finished spray powder product is 5-6m/S, and the stirring time is 10-20 min.
In a preferred embodiment, the honeycomb textures are staggered in the two etching processes of the steps S4 and S5.
The invention has the technical effects and advantages that:
1. according to the invention, nickel, chromium, cobalt, cubic boron nitride, nano ceramic fiber, zirconia fiber, modified expandable graphite, a reflective coating, a solid lubricant and a ceramic adhesive are used as raw materials of the coating, and the addition of nickel, chromium, cobalt and cubic boron nitride enables the coating to have good high temperature resistance effect and higher strength; by adding the reflective coating, the heat effect of short-wave infrared rays is greatly enhanced, and the heat utilization rate of the boiler in use can be effectively increased; the ceramic adhesive is matched with the honeycomb treatment process for use, and the modified expandable graphite, the nano ceramic fiber and the zirconia fiber are matched, so that the whole coating has higher strength and stronger anti-cracking and anti-falling effects;
2. the invention adopts the processing technology combining the thermal spraying technology and the etching technology to respectively spray the coating for two times, and carries out cooling and honeycomb texture treatment after each spraying, and the coating is matched with the nano ceramic fiber and the zirconia fiber with anti-cracking and anti-falling effects to use, so that the boiler coating has higher strength and is less prone to falling and cracking.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a preparation method of a high-temperature resistant material for a boiler, wherein the used raw materials (in parts by weight) comprise: 40-60 parts of nickel, 8-14 parts of chromium, 5-8 parts of cobalt, 12-14 parts of cubic boron nitride, 2-3 parts of nano ceramic fiber, 2-3 parts of zirconia fiber, 12-14 parts of modified expandable graphite, 2-3 parts of a reflective coating, 2-3 parts of a solid lubricant and 4-6 parts of a ceramic adhesive;
the reflective coating is specifically a white reflective coating XZ-T003;
the solid lubricant is molybdenum disulfide;
specifically, in the present embodiment, the raw materials (by weight) used include: 40 parts of nickel, 14 parts of chromium, 5 parts of cobalt, 14 parts of cubic boron nitride, 2 parts of nano ceramic fiber, 3 parts of zirconia fiber, 12 parts of modified expandable graphite, 3 parts of reflective coating, 2 parts of solid lubricant and 6 parts of ceramic adhesive.
A preparation method of a high-temperature resistant material for a boiler comprises the following specific processing steps:
s1, primary processing of raw materials: adding nickel, chromium, cobalt, cubic boron nitride, modified expandable graphite and a solid lubricant into a stirring tank in proportion, wherein the stirring linear speed is 1m/s, the stirring time is 20min, so as to obtain a basic mixed material, and then adding the basic mixed material into a ball mill for grinding, so as to obtain basic powder particles for later use;
s2, mixing materials: uniformly mixing the basic powder particles obtained in the step S1 with the nano ceramic fibers, the zirconia fibers, the reflective coating and the ceramic adhesive, wherein the stirring linear speed is 5m/S, and the stirring time is 10min, so as to obtain a finished spraying powder product;
s3, treating a substrate, cleaning the surface of the boiler substrate, processing the inner wall and the outer wall of the substrate into surfaces with honeycomb textures by adopting an etching process after cleaning, and then cleaning and cooling;
s4, primary spraying: spraying the spraying powder prepared in the step S2 on the surface of the substrate with the honeycomb texture obtained in the step S3 by adopting a thermal spraying technology to form a bottom layer, and cooling to normal temperature;
s5, secondary spraying: processing the coatings on the inner and outer walls of the substrate into the coating surface with the honeycomb texture again by adopting an etching process, continuously spraying powder on the coating surface with the honeycomb texture by adopting a thermal spraying technology to form a surface layer, and arranging the honeycomb texture in a staggered manner when the etching process is carried out twice in the step S4;
s6, cooling: and naturally cooling the boiler surface layer obtained in the step S5 to obtain the high-temperature-resistant boiler inner and outer wall coating.
Example 2:
the invention provides a preparation method of a high-temperature resistant material for a boiler, wherein the used raw materials (in parts by weight) comprise: 40-60 parts of nickel, 8-14 parts of chromium, 5-8 parts of cobalt, 12-14 parts of cubic boron nitride, 2-3 parts of nano ceramic fiber, 2-3 parts of zirconia fiber, 12-14 parts of modified expandable graphite, 2-3 parts of a reflective coating, 2-3 parts of a solid lubricant and 4-6 parts of a ceramic adhesive;
the reflective coating is specifically a white reflective coating XZ-T003;
the solid lubricant is molybdenum disulfide;
specifically, in the present embodiment, the raw materials (by weight) used include: 50 parts of nickel, 11 parts of chromium, 7 parts of cobalt, 13 parts of cubic boron nitride, 2.5 parts of nano ceramic fiber, 2.5 parts of zirconia fiber, 13 parts of modified expandable graphite, 2.5 parts of reflective coating, 2.5 parts of solid lubricant and 5 parts of ceramic adhesive.
A preparation method of a high-temperature resistant material for a boiler comprises the following specific processing steps:
s1, primary processing of raw materials: adding nickel, chromium, cobalt, cubic boron nitride, modified expandable graphite and a solid lubricant into a stirring tank in proportion, wherein the stirring linear speed is 3m/s, the stirring time is 25min, so as to obtain a basic mixed material, and then adding the basic mixed material into a ball mill for grinding, so as to obtain basic powder particles for later use;
s2, mixing materials: uniformly mixing the basic powder particles obtained in the step S1 with the nano ceramic fibers, the zirconia fibers, the reflective coating and the ceramic adhesive, wherein the stirring linear speed is 5.5m/S, and the stirring time is 15min, so as to obtain a finished spraying powder product;
s3, treating a substrate, cleaning the surface of the boiler substrate, processing the inner wall and the outer wall of the substrate into surfaces with honeycomb textures by adopting an etching process after cleaning, and then cleaning and cooling;
s4, primary spraying: spraying the spraying powder prepared in the step S2 on the surface of the substrate with the honeycomb texture obtained in the step S3 by adopting a thermal spraying technology to form a bottom layer, and cooling to normal temperature;
s5, secondary spraying: processing the coatings on the inner and outer walls of the substrate into the coating surface with the honeycomb texture again by adopting an etching process, continuously spraying powder on the coating surface with the honeycomb texture by adopting a thermal spraying technology to form a surface layer, and arranging the honeycomb texture in a staggered manner when the etching process is carried out twice in the step S4;
s6, cooling: and naturally cooling the boiler surface layer obtained in the step S5 to obtain the high-temperature-resistant boiler inner and outer wall coating.
Example 3:
the invention provides a preparation method of a high-temperature resistant material for a boiler, wherein the used raw materials (in parts by weight) comprise: 40-60 parts of nickel, 8-14 parts of chromium, 5-8 parts of cobalt, 12-14 parts of cubic boron nitride, 2-3 parts of nano ceramic fiber, 2-3 parts of zirconia fiber, 12-14 parts of modified expandable graphite, 2-3 parts of a reflective coating, 2-3 parts of a solid lubricant and 4-6 parts of a ceramic adhesive;
the reflective coating is specifically a white reflective coating XZ-T003;
the solid lubricant is molybdenum disulfide;
specifically, in the present embodiment, the raw materials (by weight) used include: 60 parts of nickel, 8 parts of chromium, 8 parts of cobalt, 12 parts of cubic boron nitride, 3 parts of nano ceramic fiber, 2 parts of zirconia fiber, 14 parts of modified expandable graphite, 2 parts of reflective coating, 3 parts of solid lubricant and 4 parts of ceramic adhesive.
A preparation method of a high-temperature resistant material for a boiler comprises the following specific processing steps:
s1, primary processing of raw materials: adding nickel, chromium, cobalt, cubic boron nitride, modified expandable graphite and a solid lubricant into a stirring tank in proportion, wherein the stirring linear speed is 5m/s, the stirring time is 30min, so as to obtain a basic mixed material, and then adding the basic mixed material into a ball mill for grinding, so as to obtain basic powder particles for later use;
s2, mixing materials: uniformly mixing the basic powder particles obtained in the step S1 with the nano ceramic fibers, the zirconia fibers, the reflective coating and the ceramic adhesive, wherein the stirring linear speed is 6m/S, and the stirring time is 20min, so as to obtain a finished spraying powder product;
s3, treating a substrate, cleaning the surface of the boiler substrate, processing the inner wall and the outer wall of the substrate into surfaces with honeycomb textures by adopting an etching process after cleaning, and then cleaning and cooling;
s4, primary spraying: spraying the spraying powder prepared in the step S2 on the surface of the substrate with the honeycomb texture obtained in the step S3 by adopting a thermal spraying technology to form a bottom layer, and cooling to normal temperature;
s5, secondary spraying: processing the coatings on the inner and outer walls of the substrate into the coating surface with the honeycomb texture again by adopting an etching process, continuously spraying powder on the coating surface with the honeycomb texture by adopting a thermal spraying technology to form a surface layer, and arranging the honeycomb texture in a staggered manner when the etching process is carried out twice in the step S4;
s6, cooling: and naturally cooling the boiler surface layer obtained in the step S5 to obtain the high-temperature-resistant boiler inner and outer wall coating.
Example 4:
the 150 coated boilers prepared in the above examples 1 to 3 were respectively tested by normal temperature air thermal shock and normal temperature water thermal shock, and the following data were obtained:
| boiler coating Number of layers | Wear resistance of coating （L/μm） | 550 ℃ to room temperature Gas thermal shock | At 550 ℃ to normal temperature Thermal shock of water | Heat resistance of 1100 deg.C 1000h | |
| Example 1 | 50 | 11 .5 | 9 times of coating cracking and peeling Fall off | 8 coating cracks Falling off | No cracking or peeling |
| Example 2 | 50 | 13 .3 | 10 times of coating cracking and peeling Fall off | 9 coating cracks Falling off | No cracking or peeling |
| Example 3 | 50 | 12 .1 | 8 times of coating cracking and peeling Fall off | 7 times of coating cracking Falling off | No cracking or peeling |
As can be seen from the above table, the raw materials in example 2 are mixed in a moderate proportion, and each parameter in the processing technology is moderate, so that the obtained coating has good anti-cracking and anti-falling effects, high hardness and good wear resistance, the processing technology combining the thermal spraying technology and the etching technology is adopted, the coating is sprayed twice respectively, cooling and honeycomb texture processing are performed after each spraying, and the coating is used in combination with the nano ceramic fiber and the zirconia fiber which have the anti-cracking and anti-falling effects, so that the boiler coating has higher strength and is less prone to falling and cracking.
And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. A high-temperature resistant material for a boiler is characterized in that: wherein the used raw materials (by weight portion) comprise: 40-60 parts of nickel, 8-14 parts of chromium, 5-8 parts of cobalt, 12-14 parts of cubic boron nitride, 2-3 parts of nano ceramic fiber, 2-3 parts of zirconia fiber, 12-14 parts of modified expandable graphite, 2-3 parts of a reflective coating, 2-3 parts of a solid lubricant and 4-6 parts of a ceramic adhesive.
2. The high-temperature resistant material for a boiler according to claim 1, wherein: the reflective coating is specifically a white reflective coating XZ-T003.
3. The high-temperature resistant material for a boiler according to claim 1, wherein: the solid lubricant is molybdenum disulfide.
4. A preparation method of a high-temperature resistant material for a boiler is characterized by comprising the following steps: the specific processing steps are as follows:
s1, primary processing of raw materials: adding nickel, chromium, cobalt, cubic boron nitride, modified expandable graphite and a solid lubricant into a stirring tank in proportion to obtain a basic mixed material, and then adding the basic mixed material into a ball mill for grinding to obtain basic powder particles for later use;
s2, mixing materials: uniformly mixing the basic powder particles obtained in the step S1 with the nano ceramic fibers, the zirconia fibers, the reflective coating and the ceramic adhesive to obtain a finished sprayed powder product;
s3, treating a substrate, cleaning the surface of the boiler substrate, processing the inner wall and the outer wall of the substrate into surfaces with honeycomb textures by adopting an etching process after cleaning, and then cleaning and cooling;
s4, primary spraying: spraying the spraying powder prepared in the step S2 on the surface of the substrate with the honeycomb texture obtained in the step S3 by adopting a thermal spraying technology to form a bottom layer, and cooling to normal temperature;
s5, secondary spraying: processing the coating on the inner wall and the outer wall of the substrate into a coating surface with honeycomb textures by adopting an etching process, and continuously spraying powder on the coating surface with the honeycomb textures by adopting a thermal spraying technology to form a surface layer;
s6, cooling: and naturally cooling the boiler surface layer obtained in the step S5 to obtain the high-temperature-resistant boiler inner and outer wall coating.
5. The method for preparing the high-temperature resistant material for the boiler according to claim 4, wherein the method comprises the following steps: in the step S1, the stirring linear speed of the basic raw material is 1-5m/S, and the stirring time is 20-30 min.
6. The method for preparing the high-temperature resistant material for the boiler according to claim 4, wherein the method comprises the following steps: in the step S2, the stirring linear speed for processing the finished sprayed powder product is 5-6m/S, and the stirring time is 10-20 min.
7. The method for preparing the high-temperature resistant material for the boiler according to claim 4, wherein the method comprises the following steps: in the two etching processes of step S4 and step S5, the honeycomb-shaped textures are arranged alternately.
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| CN201911039716.1A CN110592519A (en) | 2019-10-29 | 2019-10-29 | Preparation method of high-temperature-resistant material for boiler |
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| CN201911039716.1A CN110592519A (en) | 2019-10-29 | 2019-10-29 | Preparation method of high-temperature-resistant material for boiler |
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| CN1501986A (en) * | 2001-02-28 | 2004-06-02 | 日本活塞环株式会社 | Wear-resistant sliding member |
| US20110313084A1 (en) * | 2006-07-27 | 2011-12-22 | Ppg Industries Ohio, Inc. | Coating compositions comprising polyurea and graphite |
| US20100322780A1 (en) * | 2008-01-03 | 2010-12-23 | Mtu Aero Engines Gmbh | Solder coating, method for coating a component, component, and adhesive tape having a solder coating |
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Application publication date: 20191220 |
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| WW01 | Invention patent application withdrawn after publication |