CN109592901B - Metal material high-temperature coating protective agent and application thereof - Google Patents
Metal material high-temperature coating protective agent and application thereof Download PDFInfo
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- CN109592901B CN109592901B CN201811584896.7A CN201811584896A CN109592901B CN 109592901 B CN109592901 B CN 109592901B CN 201811584896 A CN201811584896 A CN 201811584896A CN 109592901 B CN109592901 B CN 109592901B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
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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
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/02—Coating with enamels or vitreous layers by wet methods
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2207/00—Compositions specially applicable for the manufacture of vitreous enamels
- C03C2207/04—Compositions specially applicable for the manufacture of vitreous enamels for steel
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Abstract
The invention discloses a metal material high-temperature coating protective agent and application thereof, wherein the metal material high-temperature coating protective agent comprises the following raw materials in parts by weight: quartz powder: 40-60, aluminum oxide: 10-15, sodium metasilicate: 10-20, sodium tetraborate: 10-20, graphite electrode: 0.01-2, water: proper amount; when in use, the surface of the steel is cleaned, then the prepared high-temperature coating protective agent is coated or sprayed on the surface of the steel for drying, and then the temperature is raised by a certain temperature-raising program until the coating forms a compact glass-state protective layer on the surface of the steel, and then the subsequent high-temperature process can be carried out; the metal material high-temperature coating protective agent has the advantages of easily available raw materials, simple formula and low cost; when the alloy is used in actual production, the loss of steel in hot working can be obviously reduced by 8-10%, the effect that the surface of the steel is not oxidized or only slightly oxidized and is not decarburized or carburized is achieved, and the economic benefit is obvious.
Description
Technical Field
The invention relates to the technical field of steel material preparation, in particular to a metal material high-temperature coating protective agent and application thereof.
Background
The yellow stone city is a national mold steel production base, and the annual output of the yellow stone city accounts for 1/3 nationwide. In recent years, the production of die steel has many improvements and innovations in technology and variety, such as: the high temperature diffusion process (the temperature is more than 1200 ℃), the ultra-fine heat treatment process (the temperature is more than 1000 ℃) and the like are adopted, and the process needs to be kept for 10 to 24 hours or even longer at high temperature. The high-temperature process is adopted to ensure that the internal components of the steel are uniform (the segregation degree is reduced), the structure is refined and uniform, the toughness and the corrosion resistance of the steel are improved, the anisotropy and the like of the steel are reduced, the service life of the steel can be greatly prolonged, the requirements of users are met, and imported products are replaced.
However, such high temperature heating will cause severe oxidation burning loss (generally 8% -10%) on the steel surface, and will also cause severe decarburization (e.g. depth of 2-3mm for bearing steel, die steel, etc.) on the steel surface, while low carbon steel (e.g. low carbon stainless steel) will have defects such as abnormal recarburization, etc. The oxidation burning loss of the steel surface can increase the smelting energy loss, lead to the increase of labor cost and material loss, and lead to the unpredictable defect hidden danger (such as large-scale equipment mold explosion) caused by the incapability of ensuring the product quality on the other hand; the decarburizing on the surface of steel can lead to the appearance of a decarburized layer on the surface of the steel, so that the steel is easy to crack, early failure of the material is caused, even the whole material is scrapped, and the decarburized layer on the surface of the steel can only be removed through machining in the prior art so as to avoid the subsequent quality problem of the steel.
Aiming at the problem that steel materials are easy to be oxidized, burned and decarburized under a high-temperature process, research is carried out as a research topic in recent years by some colleges and research institutes in China, a plurality of research results are obtained, and the anti-oxidation decarburizing coating is continuously put on the market. At present, in some mechanical industries at home and abroad, for parts requiring high dimensional precision, coating protection is adopted during forging and rolling, or a stainless steel mold protection method is adopted, such as forging airplane turbine discs, blades and the like, but the parts all use alcohol as a liquefying agent (volatile and dry), and Cr is added2O3(green and toxic) and is applied to a short-time high-temperature heating process, namely, the coating can be failed after a long time by adopting electric induction heating. These oxidation and decarburization resistant coating products have several major drawbacks: firstly, the refractoriness is not enough, and the coating becomes a molten state and flows when the temperature is lower than 1300 ℃, and the coating loses effect; secondly, the coating protective material is not easy to fall off from the surface of the steel piece after being cooled, and no matter the steel piece is rolled or forged, surface inclusions are caused, and the subsequent troubles are large; thirdly, special materials are used, the formula is secret, the cost is higher, the material application is more specific, and the regeneration utilization rate is low.
Therefore, the research and development of an environment-friendly metal material high-temperature coating protective agent which has the advantages of wide raw material source, wide application range, low cost, high recycling rate, no toxicity, no harm and no volatilization becomes a problem to be solved urgently in the industry.
Disclosure of Invention
The invention aims to solve the problems that some high-temperature processes are generally needed to be processed in the production and processing processes of the existing die steel so as to obtain better product performance, but the existing steel is easy to be oxidized, burned and decarburized in the high-temperature process, the existing high-temperature anti-oxidation decarburized coating for the steel has insufficient refractoriness, is not easy to fall off from the surface of a steel piece after being used, has special materials and high cost, has specific application, cannot be recycled and the like, and provides a protective agent for a high-temperature coating of a metal material and application thereof.
The invention relates to a protective agent for a high-temperature coating of a metal material, which comprises the following raw materials in parts by weight: quartz powder: 40-60, aluminum oxide: 10-15, sodium metasilicate: 10-20, sodium tetraborate: 10-20, graphite electrode: 0.01-2, water: proper amount.
Preferably, the protective agent for the high-temperature coating of the metal material comprises the following raw materials in parts by weight: quartz powder: 50, aluminum oxide: 12, sodium metasilicate: 15, sodium tetraborate: 15, graphite electrode: 1, water: proper amount.
The quartz powder is 200-mesh quartz powder or SiO2The content is more than 60 percent; the aluminum oxide is a recovery grade aluminum profile recycled material, Al2O3The content is more than 60 percent; the sodium metasilicate is industrial grade sodium metasilicate pentahydrate; the sodium tetraborate is a recovery grade or industrial grade product, and the content of the sodium tetraborate is more than 70%; the graphite electrode is a recovery grade graphite electrode.
The invention relates to a protective agent for a high-temperature coating of a metal material, which is prepared by respectively grinding solid raw materials into 200-mesh dry powder, then uniformly mixing the dry powder according to the proportion calculated according to the design requirements of the components, adding a proper amount of water, and forcibly and uniformly stirring the mixture to form paste or emulsion.
The invention relates to an application of a protective agent for a high-temperature coating of a metal material in a high-temperature process of the metal material.
The invention relates to an application of a protective agent for a high-temperature coating of a metal material in a high-temperature process of the metal material, which comprises the following steps:
(1) firstly, removing impurities such as oil stains or rust on the surface of steel products needing high-temperature process, flushing the steel products by using a high-pressure water gun or blowing the steel products by using an air gun, further cleaning the surface of the steel products, and airing the steel products;
(2) the metal material high-temperature coating protective agent is prepared according to the brushing process of the steel surface high-temperature coating protective agent, and the specific conditions are as follows:
A. if the manual brushing process is adopted, grinding each solid raw material to 200 meshes, adding a proper amount of water to mix into paste, then uniformly brushing the paste on the surface of the steel by using a brush, airing at normal temperature until a coating is dried and solidified, and brushing the thickness of 1-2 mm;
B. if a spraying process is adopted, grinding each solid raw material to 200 meshes, adding a proper amount of water to prepare into emulsion, heating the steel to be coated to 50-100 ℃, and then carrying out mechanical spraying, and after the spraying is finished, keeping the temperature until the coating is dried, wherein the spraying thickness is 1-2 mm;
(3) heating the steel coated with the coating to 600 ℃ at a heating rate of 80-100 ℃/h, and then heating to 800 ℃ at a heating rate of 180-200 ℃/h; then rapidly heating to 1000-1300 ℃, and preserving the heat for 2-3 hours to form a layer of compact glass state protective film on the surface of the steel; and performing subsequent processing according to a high-temperature process to be performed.
Although the raw materials adopted by the metal material high-temperature coating protective agent are all recovered from waste raw materials, the prepared coating protective agent has the applicable temperature range of 1000-1300 ℃, so that the metal material can be subjected to high-temperature process treatment at the temperature of 1000-1300 ℃, and after the high-temperature process treatment is finished, no oxidation layer or only a slight oxidation layer is formed on the surface of the steel material, and no decarburized layer (or carburized layer) is generated.
After the metal material high-temperature coating protective agent is coated on the surface of steel to form a coating, in the process of heating the steel, when the temperature of the steel is increased to 600-800 ℃, borax in the coating starts to melt, the borax plays a role of a binder and firmly bonds the coating on the surface of the steel, and simultaneously bonds unmelted particles in the coating together without falling off; when the temperature of the steel is increased to 900-1000 ℃, the sodium metasilicate begins to melt, the whole coating begins to be converted to a glass state, and the temperature of the steel is kept for 2-3 hours, so that the coating on the surface of the steel is completely converted to the glass state to form a layer of sealed protective film on the surface of the steel; wherein, the alumina only participates in partial reaction, the redundant alumina (the melting point is 2030 ℃) forms a skeleton structure which is not melted any more (asbestos fiber can be additionally added as a supplementary skeleton material), so as to prevent the pasty glass film from flowing under the long-time heating at high temperature. The high-temperature coating protective agent is a glassy state protective film formed under the high-temperature process of steel, has an amorphous structure, is compact and airtight, is tightly adhered to the surface of the steel, and isolates harmful gases such as oxygen, hydrogen, nitrogen, sulfur dioxide and the like in furnace gas so as to avoid the phenomena of oxidation, decarburization and carburization on the surface of the steel. After the high-temperature process is finished, the formed glass state protective film can automatically explode in the steel air cooling process, and the surface of the steel has no iron scale and is golden yellow metallic luster; the bearing steel and the tool and die steel have only a slight oxide layer on the surface, are grayish brown, and have no decarburized layer.
The metal material high-temperature coating protective agent has low requirements on raw materials, wherein aluminum oxide, sodium tetraborate, a graphite electrode and glass can be all recycled raw materials (wherein the glass can be replaced by glass fibers), the purity of quartz powder can be required to reach 50-60%, sodium metasilicate is selected from industrial raw materials, the cost of each raw material is low, and the formed high-temperature coating protective agent has a good using effect. The inventors made extensive studies to select the raw materials by making full use of their physical and chemical properties and as follows: the quartz powder and the alumina contain silicon dioxide, alumina, zirconia, titanium oxide and other components, and can be used as a matrix agent of the high-temperature coating protective agent to improve the overall applicable temperature range of the high-temperature coating protective agent; sodium tetraborate and glass contain sodium oxide, potassium oxide, boron oxide and other components, and can be used as a cosolvent of a high-temperature coating protective agent; titanium oxide contained in the quartz powder can be used as an opacifier (covering agent) of the high-temperature coating protective agent, and the titanium oxide and a cosolvent mutually cooperate to improve the fluidity of the high-temperature coating protective agent; the components such as cobalt oxide, molybdenum oxide, copper oxide, antimony oxide and the like contained in the glass can be used as an adhesion agent (framework material) of a high-temperature coating protective agent; the aluminum oxide and graphite electrode have high melting points and can be used as carbide (skeleton material) of a high-temperature coating protective agent to prevent steel oxidation (deoxidation reduction effect).
The metal material high-temperature coating protective agent has the advantages of easily obtained raw materials, simple formula and obvious effect, and after the protective agent is applied to actual production, the protective agent can obviously reduce the loss of steel during hot processing by 8-10 percent (namely, the yield is improved by 8-10 percent), reduce the loss of the steel per ton by 1500 yuan per ton in terms of 15000 yuan per ton of the steel, reduce the loss of the steel per ton by 1200 yuan, and achieve 10000 tons per year of yield and achieve 1500 ten thousand yuan per year of economic benefit. The cost of the metal material high-temperature coating protective agent is about 4000 yuan/ton, the consumption is only 1 kg/ton of steel, namely 40 yuan/ton of steel, the manual coating amount is 10-15 tons/day according to the manual coating process, the manual cost is 15-20 yuan/ton according to the per-person wage of 200 yuan/day, the total use cost is 55-60 yuan/ton of steel, and the total use cost is almost negligible compared with the loss of steel. Therefore, the protective agent for the high-temperature coating of the metal material has the advantages of remarkable use effect and remarkable economic benefit.
The metal material high-temperature coating protective agent has the advantages of wide material source, simple and convenient preparation method, simple use method, obvious use effect and reusability, is a nontoxic, harmless and non-volatile environment-friendly high-temperature coating protective agent, is mainly used as a coating insulating material for preventing oxidation and decarburization (or carburization) of a metal material in a high-temperature state, and can be applied to high-temperature processes of the metal material in the industries of metallurgy, equipment manufacturing, aviation, energy sources and the like.
Detailed Description
In order to better explain the technical solution of the present invention, the technical solution of the present invention is further described below with reference to specific examples, which are only exemplary to illustrate the technical solution of the present invention and do not limit the present invention in any way.
Example 1
This embodiment will be described in detail by taking an example of the H13 steel being heated at 900-1200 ℃.
The invention relates to a protective agent for a high-temperature coating of a metal material, which comprises the following raw materials in parts by weight: quartz powder: 50, aluminum oxide: 12, sodium metasilicate: 15, sodium tetraborate: 15, graphite electrode: 1, water: proper amount.
The quartz powder is 200-mesh quartz powder or SiO2The content is more than 60 percent; the aluminum oxide is a recovery grade aluminum profile recycled material, Al2O3The content is more than 60 percent; the sodium metasilicate is industrial grade sodium metasilicate pentahydrate; the sodium tetraborate is a recovery grade or industrial grade product, and the content of the sodium tetraborate is more than 70%; the graphite electrode is a recovery grade graphite electrode.
The protective agent for the high-temperature coating of the metal material is prepared by respectively grinding the solid raw materials into 200-mesh dry powder, then calculating the mixture ratio according to the design requirements of the components, uniformly mixing the powder according to the ratio, adding a proper amount of water, and forcibly and uniformly stirring the mixture to form an emulsion.
The application of the metal material high-temperature coating protective agent in the H13 steel hot forging process has the temperature range of 900-1200 ℃.
The application of the protective agent for the high-temperature coating of the metal material in the high-temperature process of the metal material comprises the following steps:
(1) removing oil stains or rust and other impurities on the surface of H13 steel, flushing with a high-pressure water gun or blowing with an air gun, further cleaning the surface of the steel, and drying in the air;
(2) preparing a metal material high-temperature coating protective agent according to a coating process of the steel material surface high-temperature coating protective agent, grinding each solid raw material to 200 meshes, adding a proper amount of water to prepare into an emulsion, heating the steel material to be coated to 70 ℃, then carrying out mechanical spraying, and after the spraying is finished, keeping the temperature until the coating is dried, wherein the spraying thickness is 1.5 mm;
(3) heating the steel coated with the coating to 600 ℃ at a heating rate of 90 ℃/h, and then heating to 800 ℃ at a heating rate of 190 ℃/h; rapidly heating to 1200 ℃, and preserving the temperature for 2.5 hours to form a layer of compact glass state protective film on the surface of the steel; then, the high-temperature hot forging process is carried out at the temperature of 900-1200 ℃ according to the high-temperature process to be carried out.
After the above treatment, the surface of the H13 steel of this embodiment has no oxide layer and no decarburized layer after the high temperature hot forging process at 900-.
Example 2
This example is illustrated by the high temperature heat treatment process of 2Cr13 steel at 900-.
The metal material high-temperature coating protective agent comprises the following raw materials in parts by weight: quartz powder: 40, aluminum oxide: 10, sodium metasilicate: 20, sodium tetraborate: 20, graphite electrode: 0.01, water: proper amount.
The quartz powder is 200-mesh quartz powder or SiO2The content is more than 60 percent; the aluminum oxide is a recovery grade aluminum profile recycled material, Al2O3The content is more than 60 percent; the sodium metasilicate is industrial grade sodium metasilicate pentahydrate; the sodium tetraborate is a recovery grade or industrial grade product, and the content of the sodium tetraborate is more than 70%.
The protective agent for the high-temperature coating of the metal material is prepared by respectively grinding the solid raw materials into 200-mesh dry powder, then calculating the mixture ratio according to the design requirements of the components, uniformly mixing the powder according to the ratio, adding a proper amount of water, and forcibly stirring the mixture into an emulsion.
The application of the protective agent for the high-temperature coating of the metal material in the embodiment in the hot forging process of the 2Cr13 steel has the temperature range of 900-.
The application of the protective agent for the high-temperature coating of the metal material in the high-temperature process of the metal material comprises the following steps:
(1) firstly removing impurities such as oil stains or rust on the surface of 2Cr13 steel, then flushing by using a high-pressure water gun or blowing by using an air gun, further cleaning the surface of the steel, and airing;
(2) preparing a metal material high-temperature coating protective agent according to a coating process of the steel material surface high-temperature coating protective agent, grinding each solid raw material to 200 meshes, adding a proper amount of water to mix into an emulsion, heating the steel material to be coated to 50 ℃, then carrying out mechanical spraying, and after the spraying is finished, keeping the temperature until the coating is dried, wherein the spraying thickness is 1 mm;
(3) heating the steel coated with the coating to 600 ℃ at the heating rate of 80 ℃/h, and then heating to 800 ℃ at the heating rate of 180 ℃/h; then rapidly heating to 1000 ℃, and preserving the heat for 2 hours to form a layer of compact glass state protective film on the surface of the steel; and then carrying out subsequent processing at 900-.
After the above treatment, the 2Cr13 steel material of the present example has no oxide layer and no decarburized layer on the surface of the steel material after the hot forging high temperature process, which shows that the high temperature coating protective agent of the present example provides good protection effect when the 2Cr13 steel material is subjected to the hot forging high temperature process.
Example 3
This embodiment is described by taking the example of the H13 steel being subjected to a high temperature heat treatment process at 900-1300 ℃.
The metal material high-temperature coating protective agent comprises the following raw materials in parts by weight: quartz powder: 60, aluminum oxide: 15, sodium metasilicate: 10, sodium tetraborate: 10, graphite electrode: 2, water: proper amount.
The quartz powder is 200-mesh quartz powder or SiO2The content is more than 60 percent; the aluminum oxide is a recovery grade aluminum profile recycled material, Al2O3The content is more than 60 percent; the sodium metasilicate is industrial grade sodium metasilicate pentahydrate; the sodium tetraborate is a recovery grade or industrial grade product, and the content of the sodium tetraborate is more than 70%.
The preparation method of the protective agent for the high-temperature coating of the metal material comprises the steps of grinding the solid raw materials into 200-mesh dry powder, calculating the mixture ratio according to the design requirements of the components, uniformly mixing the powder according to the ratio, adding a proper amount of water, and forcibly stirring the mixture into a paste.
The application of the protective agent for the high-temperature coating of the metal material in the embodiment in the hot forging process of H13 steel has the temperature range of 900-.
The application of the protective agent for the high-temperature coating of the metal material in the high-temperature process of the metal material comprises the following steps:
(1) removing oil stains or rust and other impurities on the surface of H13 steel, flushing with a high-pressure water gun or blowing with an air gun, further cleaning the surface of the steel, and drying in the air;
(2) preparing a metal material high-temperature coating protective agent according to a brushing process of the steel surface high-temperature coating protective agent, grinding each solid raw material to 200 meshes, adding a proper amount of water to mix into paste, then uniformly brushing the paste on the steel surface by using a brush, airing the paste at normal temperature until the coating is dried and solidified, and brushing the paste to a thickness of 2 mm;
(3) heating the steel coated with the coating to 600 ℃ at the heating rate of 100 ℃/h, and then heating to 800 ℃ at the heating rate of 200 ℃/h; then rapidly heating to 1250 ℃, and preserving heat for 3 hours to form a layer of compact glass state protective film on the surface of the steel; and then carrying out subsequent processing according to a high-temperature process to be carried out.
After the above treatment, the H13 steel material of the present example has no oxide layer and no decarburized layer on the surface of the steel material after the hot forging high temperature process, which shows that the high temperature coating protective agent of the present example plays a good protective role when the H13 steel material is subjected to the hot forging high temperature process.
The three embodiments are merely illustrative and not intended to limit the invention in any way, and the protective agent for high-temperature metal coating of the invention can protect steel well in a high-temperature process below 1400 ℃ and avoid an oxidation layer (or a few oxidation layers) and a decarburized layer (carburized layer) on the surface of the steel.
Claims (2)
1. The application of the protective agent for the high-temperature coating of the metal material in the high-temperature process of the metal material is characterized by comprising the following steps:
(1) firstly, removing impurities such as oil stains or rust on the surface of steel products needing high-temperature process, flushing the steel products by using a high-pressure water gun or blowing the steel products by using an air gun, further cleaning the surface of the steel products, and airing the steel products;
(2) the metal material high-temperature coating protective agent is prepared according to the brushing process of the steel surface high-temperature coating protective agent, and the specific conditions are as follows:
a: if the manual brushing process is adopted, grinding each solid raw material of the metal material high-temperature coating protective agent to 200 meshes, adding a proper amount of water to mix into paste, then uniformly brushing the paste on the surface of steel by using a brush, airing at normal temperature until the coating is dried, and brushing the thickness of 1-2 mm;
b: if a spraying process is adopted, grinding each solid raw material of the metal material high-temperature coating protective agent to 200 meshes, adding a proper amount of water to mix into emulsion, heating the steel to be coated to 50-100 ℃, then carrying out mechanical spraying, and after the spraying is finished, keeping the temperature until the coating is dried, wherein the spraying thickness is 1-2 mm;
(3) heating the steel coated with the coating to 600 ℃ at a heating rate of 80-100 ℃/h, and then heating to 800 ℃ at a heating rate of 180-200 ℃/h; then rapidly heating to 1000-1300 ℃, and preserving the heat for 2-3 hours to form a layer of compact glass state protective film on the surface of the steel; then the subsequent processing can be carried out according to the high-temperature process to be carried out;
the protective agent for the high-temperature coating of the metal material comprises the following raw materials in parts by weight: quartz powder: 40-60, aluminum oxide: 10-15, sodium metasilicate: 10-20, sodium tetraborate: 10-20, graphite electrode: 0.01-2, water: proper amount;
the quartz powder is 200-mesh quartz powder or SiO2The content is more than 60 percent; the aluminum oxide is a recovery grade aluminum profile recycled material, Al2O3The content is more than 60 percent; the sodium metasilicate is industrial grade sodium metasilicate pentahydrate; the sodium tetraborate is a recovery grade or industrial grade product, and the content of the sodium tetraborate is more than 70%; the graphite electrode is a recovery grade graphite electrode;
the preparation method comprises grinding the solid materials into 200 mesh dry powder, mixing according to the design requirement, adding appropriate amount of water, and stirring to obtain paste or emulsion.
2. The application of the protective agent for the high-temperature coating of the metal material in the high-temperature process of the metal material according to claim 1 is characterized by comprising the following raw materials in parts by weight: quartz powder: 50, aluminum oxide: 12, sodium metasilicate: 15, sodium tetraborate: 15, graphite electrode: 1, water: proper amount.
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| CN101058684A (en) * | 2006-04-21 | 2007-10-24 | 中国科学院过程工程研究所 | High temperature common mild steel anti-oxidation coating and application thereof |
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| CN105585883B (en) * | 2016-03-04 | 2017-09-19 | 浙江大学 | Low-temperature sintering coating and its painting method for steel bar anti-corrosion |
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| CN1327885A (en) * | 2001-06-29 | 2001-12-26 | 沈阳黎明航空发动机集团公司 | Process for preparing high-temp protecting layer on surface of metal |
| CN101058684A (en) * | 2006-04-21 | 2007-10-24 | 中国科学院过程工程研究所 | High temperature common mild steel anti-oxidation coating and application thereof |
| CN102070351A (en) * | 2010-11-19 | 2011-05-25 | 吴江龙泾红贝家装有限公司 | High-temperature-resistant coating for metal |
| CN105215280A (en) * | 2015-11-06 | 2016-01-06 | 合肥熠辉轻合金科技有限公司 | A kind of Aluminum alloy gravity casting metals mould compound dead head |
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