阅读说明：本技术 一种锅炉用耐高温材料的制备方法 (Preparation method of high-temperature-resistant material for boiler ) 是由 韦杰 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种锅炉用耐高温材料的制备方法,具体涉及耐高温材料领域,其中所使用的原料(按重量份数计)包括：镍40-60份、铬8-14份、钴5-8份、立方氮化硼12-14份、纳米陶瓷纤维2-3份、氧化锆纤维2-3份、改性可膨胀石墨12-14份、反射涂层2-3份、固体润滑剂2-3份、陶瓷粘接剂4-6份；制备方法为：S1、原料初加工；S2、混料；S3、基底处理；S4、初次喷涂加工；S5、二次喷涂加工；S6、冷却。本发明通过采用热喷涂技术和蚀刻工艺结合的加工技术,分别将涂料进行两次喷涂,并且每次喷涂后都进行冷却、蜂窝状纹理处理,配合具备抗开裂和抗脱落效果的纳米陶瓷纤维、氧化锆纤维使用,使锅炉涂层强度更高,更加不容易脱落以及开裂。(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.)

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.

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.