CN116462997A - High-temperature antioxidant coating and high-temperature antioxidant coating - Google Patents
High-temperature antioxidant coating and high-temperature antioxidant coating Download PDFInfo
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- CN116462997A CN116462997A CN202310437912.4A CN202310437912A CN116462997A CN 116462997 A CN116462997 A CN 116462997A CN 202310437912 A CN202310437912 A CN 202310437912A CN 116462997 A CN116462997 A CN 116462997A
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- 238000000576 coating method Methods 0.000 title claims abstract description 117
- 239000011248 coating agent Substances 0.000 title claims abstract description 106
- 239000003963 antioxidant agent Substances 0.000 title claims abstract description 43
- 230000003078 antioxidant effect Effects 0.000 title claims abstract description 43
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 40
- 230000003647 oxidation Effects 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 27
- 239000002893 slag Substances 0.000 claims abstract description 17
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 30
- 239000000758 substrate Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 9
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 32
- 238000003723 Smelting Methods 0.000 abstract description 8
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 48
- 229910052742 iron Inorganic materials 0.000 description 24
- 238000005507 spraying Methods 0.000 description 24
- 239000003973 paint Substances 0.000 description 20
- 238000001816 cooling Methods 0.000 description 14
- 239000000203 mixture Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 238000001035 drying Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000009472 formulation Methods 0.000 description 7
- GALOTNBSUVEISR-UHFFFAOYSA-N molybdenum;silicon Chemical compound [Mo]#[Si] GALOTNBSUVEISR-UHFFFAOYSA-N 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 230000003064 anti-oxidating effect Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Ceramic Products (AREA)
Abstract
The invention provides a high-temperature antioxidant coating, which is prepared from powder and a solvent, wherein the powder comprises the following components: 70-90 wt% of electric smelting magnesia, 5-20 wt% of hydraulic inorganic gel material, 2-15 wt% of anhydrous sodium carbonate and 1-5 wt% of blast furnace slag. The application also provides a high temperature oxidation resistant coating. The application provides a high-temperature antioxidant coating which does not use Cr-containing materials, does not cause environmental pollution and has the characteristic of environmental protection; the high-temperature antioxidant coating provided by the application can be used in a high-temperature heating environment (higher than 1300 ℃), is stable and reliable, and can reduce burning loss by 75% -80% when being used.
Description
Technical Field
The invention relates to the technical field of silicon steel coatings, in particular to a high-temperature oxidation-resistant coating and a high-temperature oxidation-resistant coating.
Background
The billet and ingot are heated or soaked in a heating furnace with an oxidizing atmosphere at 1200 ℃ before rolling. The heating time of the billet in the heating furnace is generally 2-3 hours or even longer, and the surface of the billet and oxygen in the atmosphere undergo strong oxidation reaction at high temperature to generate a large amount of iron scales, so that the yield of the steel is obviously reduced.
According to statistics, in the production of metallurgical enterprises, the oxidation burning loss caused by high-temperature oxidation of the surface of steel materials is 0.5-2.5% when the steel materials are heated once; in special steels, this oxidation burn-out is as high as 5%. Silicon steel is an alloy steel containing 1-4% of silicon, especially oriented silicon steel, the silicon content is generally above 3%, the heating and soaking temperature is above 1300 ℃, and the surface oxide has high Si content, low melting point and larger burning loss. In the heating process, when the furnace temperature is controlled improperly or the blank stays in a high temperature section for a long time, particularly when rolling faults occur, the furnace is heated and adjusted untimely, so that the iron scale of the steel is thickened, generally by 1-5 mm, and the thickness can reach 10mm in serious cases. This causes a great waste of raw materials, energy and labor, and the iron scales and scrap iron are repeatedly applied by simple furnace return at present, so that the rise space and the utilization rate are low.
According to the above description, the iron scale generated by high-temperature oxidation brings direct yield and quality loss to steel production, and meanwhile, if the iron scale is not cleaned in time, the iron scale can be pressed into the surface of a blank during rolling, so that the surface defect of a product is caused, and the product is scrapped when the iron scale is seriously used. In addition, scale generated when heating billets falls on the bottom of the furnace, not only can erode the furnace body and affect the service life of the furnace, but also heavy physical labor is added during cleaning, and some units adopt a liquid slag discharging method, which consumes a great amount of energy.
Therefore, how to reduce the generation of such waste resources and improve the energy and resource utilization rate has been paid attention to in the industry, and high-temperature antioxidation coatings are generated at this time; at present, most manufacturers use MgO-Cr at home and abroad 2 O 3 The coating was used as a high temperature oxidation resistant coating, but Cr 6+ Environmental pollution is easy to cause; and the coating effect in a high-temperature heating environment (> 1300 ℃) is poor.
Disclosure of Invention
The technical problem solved by the invention is to provide the high-temperature oxidation-resistant coating, which has good protection effect on high-temperature heating environment of more than 1300 ℃ and does not cause environmental pollution when being used as the coating of silicon steel.
In view of this, the present application provides a high temperature oxidation resistant coating prepared from a powder and a solvent, the powder comprising:
preferably, the solvent is water, and the mass ratio of the powder to the solvent is 100: (30-70).
Preferably, the MgO content in the fused magnesia is more than 95 weight percent, and the granularity is-200 meshes.
Preferably, the hydraulic inorganic gel material is Al 2 O 3 65 to 70 weight percent of calcium aluminate cement.
Preferably, siO in the blast furnace slag 2 28-36 wt%, caO 38-45 wt%, al 2 O 3 The content of MgO is less than 15wt%, and the content of MgO is less than 10wt%.
Preferably, the content of the fused magnesia is 80-88 wt%.
Preferably, the content of the hydraulic inorganic gel material is 10 to 15wt%.
Preferably, the content of the anhydrous sodium carbonate is 3-10wt%, and the content of the blast furnace slag is 2-4wt%.
The application also provides a high-temperature oxidation-resistant coating, which comprises a substrate and a coating coated on the surface of the substrate, wherein the coating is prepared from the coating.
Preferably, the substrate is silicon steel, and the thickness of the coating is 0.5-1.5 mm.
The application provides a high-temperature antioxidant coating, which is prepared from powder and a solvent, wherein the powder comprises the following components: 70-90 wt% of electric smelting magnesia, 5-20 wt% of hydraulic inorganic gel material, 2-15 wt% of anhydrous sodium carbonate and 1-5 wt% of blast furnace slag. The high-temperature antioxidation coating uses the fused magnesia as a main material, adheres to the surface of a matrix after forming a coating, even if an iron scale is combined, the melting point is not greatly reduced, and the protection effect at high temperature is further ensured, and the hydraulic inorganic cementing material has stronger adhesion at low temperature, has fire resistance and is not easy to crack at medium and high temperatures. Therefore, the high-temperature antioxidation coating provided by the application is used as a coating of silicon steel, has high protection effect in a high-temperature heating environment of more than 1300 ℃, does not contain Cr materials, and has no pollution to the environment.
Drawings
FIG. 1 is a photograph of a coating layer formed by spraying the coating material prepared in example 1 of the present invention on the surface of a substrate;
FIG. 2 is a photograph showing the surface morphology of the coating prepared in example 1 of the present invention at high temperature.
Detailed Description
For a further understanding of the present invention, preferred embodiments of the invention are described below in conjunction with the examples, but it should be understood that these descriptions are merely intended to illustrate further features and advantages of the invention, and are not limiting of the claims of the invention.
Aiming at the problems that Cr-containing materials in the high-temperature oxidation-resistant coating in the prior art cause environmental pollution and the high-temperature-resistant effect is poor, the application provides the high-temperature oxidation-resistant coating, which is prepared by taking fused magnesia as a main material and assisting hydraulic inorganic gel materials, inorganic sodium carbonate and blast furnace slag, wherein the obtained high-temperature oxidation-resistant coating does not contain Cr materials, can effectively protect a substrate from being excessively oxidized, and further reduces the oxidation burning rate of the substrate. Specifically, the embodiment of the invention discloses a high-temperature antioxidant coating, which is prepared from powder and a solvent, wherein the powder comprises the following components:
in the high-temperature antioxidation coating provided by the application, the fused magnesia is used as a main raw material, the melting point of the fused magnesia is 2800 ℃, after the coating is formed, the fused magnesia is adhered to the surface of a substrate, even if an iron scale is combined, the melting point is not reduced too much, and the protection effect of the coating at high temperature is further affected, so that the protection effect of the coating at high temperature is realized. The invention adopts large crystal fused magnesia with MgO content of 98 percent and minus 200 meshes. The content of the fused magnesia is 70-90 wt%, specifically 80-88 wt%, more specifically 80wt%, 81wt%, 82wt%, 83wt%, 84wt%, 85wt%, 86wt%, 87wt% or 88wt%.
The hydraulic inorganic cementing material is used as a high-temperature binding agent, is 65-70% calcium aluminate cement, has strong binding property at low temperature, can effectively adhere paint and a plate blank, is not easy to crack at medium and high temperatures, and has fire resistance. The content of the hydraulic inorganic gel material is 5 to 20wt%, specifically, the content of the hydraulic inorganic gel material is 10 to 15wt%, more specifically, the content of the hydraulic inorganic gel material is 10wt%, 11wt%, 12wt%, 13wt%, 14wt% or 15wt%.
The anhydrous sodium carbonate acts as a binder which aids in better binding of the coating and metal molecules, and industrial pure sodium carbonate can be used. The content of the anhydrous sodium carbonate is 2 to 15wt%, specifically, the content of the anhydrous sodium carbonate is 3 to 10wt%, more specifically, the content of the anhydrous sodium carbonate is 3wt%, 4wt%, 5wt%, 6wt%, 7wt%, 8wt%, 9wt% or 10wt%.
The blast furnace slag is an amorphous material, has no fixed melting point, but has softening temperature, is melted into liquid glass phase at high temperature, can repair paint cracks, has poor thermal shock property, better separates paint from a steel body after being discharged from a furnace, and is convenient for rough rolling descaling. Blast furnace grain slag SiO 2 28-36 wt%, caO 38-45 wt%, al 2 O 3 The content of MgO is less than 15wt%, and the content of MgO is less than 10wt%. The content of the blast furnace water slag is 1-5 wt%, and specifically, the content of the blast furnace water slag is 1wt%, 2wt%, 3wt%, 4wt% or 5wt%.
Furthermore, the application also provides a high-temperature oxidation-resistant coating, which comprises a substrate and a coating coated on the surface of the substrate, wherein the coating is prepared from the coating according to the scheme.
In this application, the substrate is selected from silicon steel, and the coating method is a method well known to those skilled in the art, and further a spraying method is used. The thickness of the coating is 0.5-1.5 mm.
The application provides a high-temperature antioxidant coating which does not use Cr-containing materials, does not cause environmental pollution and has the characteristic of environmental protection; the high-temperature antioxidation coating provided by the application has lower cost: the cost price of the finished coating in the market is 2-3 ten thousand yuan/ton, the cost price of the coating is 6000 yuan/ton, and the use cost can be reduced by 70-80%; the high-temperature antioxidant coating provided by the application can be used in a high-temperature heating environment (higher than 1300 ℃), is stable and reliable, and can reduce burning loss by 75% -80% when being used. In addition, the high-temperature antioxidant paint provided by the application is simple to prepare, few in formula material types, low in processing requirement, convenient to use and capable of completing spraying by using a spray gun.
In order to further understand the present invention, the high temperature oxidation resistant coating and the high temperature oxidation resistant coating provided by the present invention will be described in detail with reference to the following examples, and the scope of the present invention is not limited by the following examples.
In the following examples, the fused magnesia is large crystal fused magnesia with MgO content of 98 percent and is minus 200 meshes; the powdery hydraulic inorganic gel material is 65-70wt% calcium aluminate cement, and the main component of blast furnace slag is SiO 2 (35.23％)、CaO(41.98％)、Al 2 O 3 (13.49％)、MgO(7.66％)。
Example 1
The specific powder formulation of the antioxidant coating is prepared according to the following table, and water is additionally added in a ratio of 100:50 to obtain the high-temperature antioxidant coating;
table 1 table of composition data for high temperature oxidation resistant coating powders of slab silicon steel
| Material name | Electric smelting magnesia | Calcium aluminate cement | Anhydrous sodium carbonate | Blast furnace slag |
| wt％ | 83.00 | 10.00 | 5.00 | 2.00 |
Spraying the prepared high-temperature antioxidant paint on the surface of silicon steel, wherein the high-temperature antioxidant paint comprises the following concrete steps:
test substrate: silicon steel sample-length x width x height: 10cm x 5cm x 1cm;
the spraying process comprises the following steps: firstly, placing a sample into a muffle furnace at 500 ℃ for preheating for 20min, spraying, controlling the thickness of the coating to be 0.8-1.3 mm, and then placing the sample into the muffle furnace again for drying; as shown in fig. 1, fig. 1 is a photograph of a silicon steel surface sprayed with a coating after drying, and the phenomenon of compact coating, no bubbles and cracking can be seen from the figure;
heating conditions: placing the dried sample into a silicon-molybdenum heating furnace, and heating for 2 hours according to a system of 1350 ℃; FIG. 2 is a photograph showing the surface morphology of a coating after high temperature, and the coating is free of bubbles, cracks and hollows.
The cooling mode is as follows: water cooling is carried out after the furnace is discharged, the surface coating and the iron scale automatically fall off, the separation is easy, and the thickness of the iron scale is less than or equal to 1mm;
test results: the coatings formed from the above coatings reduced the oxidation burn rate by 75.66% compared to the uncoated samples.
Example 2
The specific powder formulation of the antioxidant coating is prepared according to the following table, and water is added in the proportion of 100:60 to obtain the high-temperature antioxidant coating;
table 2 table of composition data for high temperature oxidation resistant coating powders of slab silicon steel
| Material name | Electric smelting magnesia | Calcium aluminate cement | Anhydrous sodium carbonate | Blast furnace slag |
| wt％ | 83.00 | 10.00 | 3.00 | 4.00 |
Spraying the prepared high-temperature antioxidant paint on the surface of silicon steel, wherein the high-temperature antioxidant paint comprises the following concrete steps:
test substrate: silicon steel sample-length x width x height: 10cm x 5cm x 1cm;
the spraying process comprises the following steps: firstly, placing a sample into a muffle furnace at 500 ℃ for preheating for 20min, spraying, controlling the thickness of the coating to be 0.8-1.3 mm, and then placing the sample into the muffle furnace again for drying;
heating conditions: placing the dried sample into a silicon-molybdenum heating furnace, and heating for 2 hours according to a system of 1350 ℃;
the cooling mode is as follows: water cooling is carried out after the furnace is discharged, the surface coating and the iron scale automatically fall off, the separation is easy, and the thickness of the iron scale is less than or equal to 1mm.
Test results: the coatings formed from the above coatings reduced the oxidation burn rate by 70.27% compared to the uncoated samples.
Example 3
The specific powder formulation of the antioxidant coating is prepared according to the following table, and water is added in the proportion of 100:55 in addition to the solid powder to obtain the high-temperature antioxidant coating;
table 3 table of composition data for high temperature oxidation resistant coating powders of slab silicon steel
| Material name | Electric smelting magnesia | Calcium aluminate cement | Anhydrous sodium carbonate | Blast furnace slag |
| wt％ | 84.00 | 10.00 | 5.00 | 1.00 |
Spraying the prepared high-temperature antioxidant paint on the surface of silicon steel, wherein the high-temperature antioxidant paint comprises the following concrete steps:
test substrate: silicon steel sample-length x width x height: 10cm x 5cm x 1cm;
the spraying process comprises the following steps: firstly, placing a sample into a muffle furnace at 500 ℃ for preheating for 20min, spraying, controlling the thickness of the coating to be 0.8-1.3 mm, and then placing the sample into the muffle furnace again for drying;
heating conditions: placing the dried sample into a silicon-molybdenum heating furnace, and heating for 2 hours according to a system of 1350 ℃;
the cooling mode is as follows: water cooling is carried out after the furnace is discharged, the surface coating and the iron scale automatically fall off, the separation is easy, and the thickness of the iron scale is less than or equal to 1mm;
test results: the coatings formed from the above coatings reduced the oxidation burn rate by 72.13% compared to the uncoated samples.
Comparative example 1
The specific powder formulation of the antioxidant coating is prepared according to the following table, and water is additionally added in a ratio of 100:50 to obtain the high-temperature antioxidant coating;
table 4 composition data table of slab silicon steel high temperature antioxidant paint powder
| Material name | Electric smelting magnesia | Calcium aluminate cement | Anhydrous sodium carbonate | Blast furnace slag |
| Percent% | 80.00 | 10.00 | 4.00 | 6.00 |
Spraying the prepared high-temperature antioxidant paint on the surface of silicon steel, wherein the high-temperature antioxidant paint comprises the following concrete steps:
test substrate: silicon steel sample-length x width x height: 10cm x 5cm x 1cm;
the spraying process comprises the following steps: firstly, placing a sample into a muffle furnace at 500 ℃ for preheating for 20min, spraying, controlling the thickness of the coating to be 0.8-1.3 mm, and then placing the sample into the muffle furnace again for drying;
heating conditions: placing the dried sample into a silicon-molybdenum heating furnace, and heating for 2 hours according to a system of 1350 ℃;
the cooling mode is as follows: water cooling is carried out after the furnace is discharged, the surface coating and the iron scale automatically fall off, the separation is easy, and the thickness of the iron scale is less than or equal to 1mm.
Test results: the coating formed from the above coating reduced the oxidation burn rate by 62.40% compared to the uncoated sample.
Comparative example 2
The specific powder formulation of the antioxidant coating is prepared according to the following table, and water is added in the proportion of 100:60 to obtain the high-temperature antioxidant coating;
table 5 table of composition data for high temperature oxidation resistant coating powders of slab silicon steel
| Material name | Electric smelting magnesia | Calcium aluminate cement |
| Percent% | 85.00 | 15.00 |
Spraying the prepared high-temperature antioxidant paint on the surface of silicon steel, wherein the high-temperature antioxidant paint comprises the following concrete steps:
test substrate: silicon steel sample-length x width x height: 10cm x 5cm x 1cm;
the spraying process comprises the following steps: firstly, placing a sample into a muffle furnace at 500 ℃ for preheating for 20min, spraying, controlling the thickness of the coating to be 0.8-1.3 mm, and then placing the sample into the muffle furnace again for drying;
heating conditions: placing the dried sample into a silicon-molybdenum heating furnace, and heating for 2 hours according to a system of 1350 ℃;
the cooling mode is as follows: water cooling is carried out after the furnace is discharged, the surface coating and the iron scale automatically fall off, the separation is easy, and the thickness of the iron scale is less than or equal to 1mm.
Test results: the coatings formed from the above coatings reduced the oxidation burn rate by 55.74% compared to the uncoated samples.
Comparative example 3
The specific powder formulation of the antioxidant coating is prepared according to the following table, and water is added in the proportion of 100:60 to obtain the high-temperature antioxidant coating;
table 6 composition data table of slab silicon steel high temperature antioxidant paint powder
| Material name | Electric smelting magnesia | M32.5 Portland cement |
| Percent% | 85.00 | 15.00 |
Spraying the prepared high-temperature antioxidant paint on the surface of silicon steel, wherein the high-temperature antioxidant paint comprises the following concrete steps:
test substrate: silicon steel sample-length x width x height: 10cm x 5cm x 1cm;
the spraying process comprises the following steps: firstly, placing a sample into a muffle furnace at 500 ℃ for preheating for 20min, spraying, controlling the thickness of the coating to be 0.8-1.3 mm, and then placing the sample into the muffle furnace again for drying;
heating conditions: placing the dried sample into a silicon-molybdenum heating furnace, and heating for 2 hours according to a system of 1350 ℃;
the cooling mode is as follows: water cooling is carried out after the furnace is discharged, the surface coating and the iron scale automatically fall off, the separation is easy, and the thickness of the iron scale is less than or equal to 1mm.
Test results: the coating formed from the above coating reduced the oxidation burn rate by 35.76% compared to the uncoated sample.
Comparative example 4
The specific powder formulation of the antioxidant coating is prepared according to the following table, and water is additionally added in a ratio of 100:50 to obtain the high-temperature antioxidant coating;
table 7 composition data table of slab silicon steel high temperature oxidation resistant coating powder
| Material name | Light burned magnesium ball | M32.5 Portland cement |
| Percent% | 90.00 | 10.00 |
Spraying the prepared high-temperature antioxidant paint on the surface of silicon steel, wherein the high-temperature antioxidant paint comprises the following concrete steps:
test substrate: silicon steel sample-length x width x height: 10cm x 5cm x 1cm;
the spraying process comprises the following steps: firstly, placing a sample into a muffle furnace at 500 ℃ for preheating for 20min, spraying, controlling the thickness of the coating to be 0.8-1.3 mm, and then placing the sample into the muffle furnace again for drying;
heating conditions: placing the dried sample into a silicon-molybdenum heating furnace, and heating for 2 hours according to a system of 1350 ℃;
the cooling mode is as follows: water cooling is carried out after the furnace is discharged, the surface coating and the iron scale automatically fall off, the separation is easy, and the thickness of the iron scale is less than or equal to 1mm.
Test results: the coating formed from the above coating reduced the oxidation burn rate by 39.02% compared to the uncoated sample.
The above description of the embodiments is only for aiding in the understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A high temperature antioxidant coating prepared from a powder and a solvent, the powder comprising:
2. the high temperature oxidation resistant coating according to claim 1, wherein the solvent is water, and the mass ratio of the powder material to the solvent is 100: (30-70).
3. The high temperature oxidation resistant coating according to claim 1, wherein the MgO content in the fused magnesia is greater than 95wt% and the particle size is-200 mesh.
4. The high temperature oxidation resistant coating according to claim 1, wherein the hydraulic inorganic gel material is Al 2 O 3 65 to 70 weight percent of calcium aluminate cement.
5. The high temperature oxidation resistant coating according to claim 1, wherein the SiO in the blast furnace slag is 2 28-36 wt%, caO 38-45 wt%, al 2 O 3 The content of MgO is less than 15wt%, and the content of MgO is less than 10wt%.
6. The high temperature oxidation resistant coating according to claim 1, wherein the content of the fused magnesia is 80-88 wt%.
7. The high temperature oxidation resistant coating according to claim 1, wherein the content of the hydraulic inorganic gel material is 10 to 15wt%.
8. The high-temperature oxidation-resistant coating according to claim 1, wherein the content of the anhydrous sodium carbonate is 3-10 wt% and the content of the blast furnace slag is 2-4 wt%.
9. A high temperature oxidation resistant coating comprising a substrate and a coating applied to the surface of the substrate, the coating being prepared from the coating of any one of claims 1 to 8.
10. The high temperature oxidation resistant coating according to claim 9, wherein the substrate is silicon steel and the thickness of the coating is 0.5-1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310437912.4A CN116462997B (en) | 2023-04-21 | 2023-04-21 | High-temperature antioxidant coating and high-temperature antioxidant coating |
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| CN109294298A (en) * | 2018-10-16 | 2019-02-01 | 北京隆源纳欣科技有限公司 | One kind being applied to high temperature steel antioxidant coating and preparation method thereof |
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| CN101760599A (en) * | 2010-02-09 | 2010-06-30 | 武汉钢铁(集团)公司 | Steel billet anti-oxidation coating material |
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