CN102219533A - Billet coating and preparation method thereof - Google Patents
Billet coating and preparation method thereof Download PDFInfo
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- CN102219533A CN102219533A CN2011100920753A CN201110092075A CN102219533A CN 102219533 A CN102219533 A CN 102219533A CN 2011100920753 A CN2011100920753 A CN 2011100920753A CN 201110092075 A CN201110092075 A CN 201110092075A CN 102219533 A CN102219533 A CN 102219533A
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- steel billet
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- fireclay
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Abstract
The invention discloses a billet coating and a preparation method thereof. The billet coating comprises a base stock and a binder, and the base stock comprises coal ash and refractory clay, wherein the content of the coal ash is 45wt% to 58wt%, the content of the refractory clay is 2wt% to 15wt%, and the content of the binder is 40wt% to 45wt%.
Description
Technical field
The present invention relates to a kind of steel billet coating material and manufacture method thereof, specifically, the present invention relates to a kind of steel billet coating material and manufacture method thereof that prevents steel billet oxidized and decarburization in high-temperature heat treatment process.
Background technology
Steel billet needs to heat-treat in process furnace before rolling usually, and then enters the steel that are rolled into various needs in the milling train.Steel billet is being carried out in the process of high-temperature heat treatment, billet surface oxidized and decarburization easily, this not only influences the surface quality of steel billet, also can increase the rolling loss of steel.
In order to solve oxidation and the decarburization problem of steel billet in heat treatment process; two kinds of solutions are arranged usually; a kind of is to apply steel billet coating material at billet surface to form coating; another kind is in heat treatment process protective gas (for example nitrogen, argon gas etc.) to be filled in the process furnace, and its purpose all is for the oxygen in the isolated process furnace atmosphere.In above-mentioned solution, steel billet coating material since lower, the easy construction of cost, effect significantly and more and more receive publicity.
In order to prevent that coating from coming off or damage in heat treatment process, steel billet coating material need have high-temperature stability.Various high temperature resistant steel billet coating have been developed at present, these coating generally include base-material and tackiness agent, tackiness agent mainly is an inorganic adhesive, and base-material is formed by the single-component raw material or the raw mineral materials proportioning of the oxide compound that comprises aluminium, silicon, calcium, magnesium, iron, chromium, potassium, sodium etc. usually.
Yet existing steel billet coating material need use the raw mineral materials of elements such as containing aluminium, silicon, calcium, magnesium, iron, chromium, potassium, sodium, thereby is restricted aspect obtaining at raw material.For example, at publication number is in the Chinese patent application of CN101058684, disclose a kind of mild steel anti-oxidation coating, described antioxidizing paint comprises: breeze comprises in zircon diamond stone breeze, feldspar breeze, high alumina stone ore powder, silica breeze and the silicate clay powder one or more; Metallurgical waste comprises in slag, the converter mud one or more; Carbon containing reducer comprises in graphite, carbon black, coke powder and the coal dust one or more; Mineral binder bond.In addition, adopt raw mineral materials to need higher cost, and in the recovery process of raw mineral materials, also can cause damage to environment inevitably.
Summary of the invention
In order to solve problems of the prior art, an aspect of of the present present invention provides a kind of steel billet coating material and manufacture method thereof, and described steel billet coating material has good low temperature and high temperature adhesion.
According to an aspect of the present invention, provide a kind of steel billet coating material that can reduce the oxidation and decarbonization speed of steel billet and help improving the environmental friendliness degree.
According to an aspect of the present invention, a kind of steel billet coating material is provided, described steel billet coating material comprises base-material and binding agent, described base-material comprises flyash and fireclay, wherein, the content of flyash is 45wt% to 58wt%, and the content of fireclay is 2wt% to 15wt%, and the content of binding agent is 40wt% to 45wt%.
According to an aspect of the present invention, described flyash can comprise the silicon-dioxide of 40～60wt%, the aluminium sesquioxide of 10～30wt%, the ferric oxide of 1～3wt%, fixed carbon and other unavoidable impurities of 1～35wt%.
According to an aspect of the present invention, wherein, the content of the fixed carbon in the described flyash is greater than 20wt%.
According to an aspect of the present invention, described fireclay can comprise the silicon-dioxide of 40～60wt% and the aluminium sesquioxide of 40～60wt%.
According to an aspect of the present invention, described binding agent is at least a in silicon sol, potassium-sodium water glass, the aluminium dihydrogen phosphate.
According to a further aspect in the invention, provide a kind of method of making steel billet coating material, this method may further comprise the steps: flyash and fireclay are mixed with the preparation base-material; The base-material that obtains is carried out grinding; Add binding agent in the base-material behind grinding and stir, wherein, the content of flyash is 45wt% to 58wt%, and the content of fireclay is 2wt% to 15wt%, and the content of binding agent is 40wt% to 45wt%.
According to an aspect of the present invention, in the step of grinding with below base-material grinding to 200 order.
According to an aspect of the present invention, wherein, the fusing point of base-material is between 1250 ℃ to 1300 ℃.
According to an aspect of the present invention, described flyash can comprise the silicon-dioxide of 40～60wt%, the aluminium sesquioxide of 10～30wt%, the ferric oxide of 1～3wt%, fixed carbon and other unavoidable impurities of 1～35wt%.
According to an aspect of the present invention, wherein, the content of the fixed carbon in the described flyash is greater than 20%.
According to an aspect of the present invention, described fireclay can comprise the silicon-dioxide of 40～60wt% and the aluminium sesquioxide of 40～60wt%.
According to an aspect of the present invention, described binding agent is at least a in silicon sol, potassium-sodium water glass, the aluminium dihydrogen phosphate.
Embodiment
Hereinafter, will describe embodiments of the invention in detail.
One embodiment of the present of invention relate to a kind of steel billet coating material, described steel billet coating material comprises base-material and binding agent, described base-material comprises flyash and fireclay, wherein, the content of flyash is 45wt% to 58wt%, the content of fireclay is 2wt% to 15wt%, and the content of binding agent is 40wt% to 45wt%.
Flyash can be by reclaiming in industrial production, and wherein, the fine coal ash composition can be different and different owing to working condition.According to one embodiment of present invention, described flyash can comprise the silicon-dioxide of 40～60wt%, the aluminium sesquioxide of 10～30wt%, the ferric oxide of 1～3wt%, fixed carbon and other unavoidable impurities of 1～35wt%.Flyash can be sintered or porcelainization in high-temperature heating process, thereby can make steel billet and airborne oxygen isolated attached to the surface of steel billet, thereby can prevent the oxidation and the decarburization of steel billet.
Preferably, according to one embodiment of present invention, the content of the fixed carbon in the flyash is greater than 20wt%.When the content of the fixed carbon in the flyash during greater than 20wt%, fixed carbon is evenly distributed in the coating, and therefore, in heat-processed, fixed carbon contacts with airborne oxygen and reacts, thereby can reduce the oxygen gesture of coating.
In base-material, add fireclay and can regulate the fine coal fusion point of ash, thereby in heat-processed, the coating of steel billet coating material can form molten at billet surface, be unlikely to again to drop simultaneously, play good every anoxybiotic performance.According to one embodiment of present invention, the content of fireclay is 2wt% to 15wt%, and the fusing point of mixture is between 1250 ℃ to 1300 ℃.According to another embodiment of the invention, fireclay can comprise the silicon-dioxide of 40～60wt% and the aluminium sesquioxide of 40～60wt%.
Steel billet coating material comprises binding agent to help base-material equably attached to billet surface.Binding agent can be the mineral binder bond that comprises alkali metal silicate salt, silicon series, phosphoric acid salt, borate family etc.According to one embodiment of present invention, binding agent can be at least a in silicon sol, potassium-sodium water glass, the aluminium dihydrogen phosphate.Preferably, use silicon sol as binding agent.
Another embodiment of the present invention relates to a kind of method of making steel billet coating material, and this method may further comprise the steps: flyash and fireclay are mixed with the preparation base-material; The base-material that obtains is carried out grinding; Add binding agent in the base-material behind grinding and stir, wherein, the content of flyash is 45wt% to 58wt%, and the content of fireclay is 2% to 15%, and the content of binding agent is 40% to 45%.
Base-material is easier to be evenly distributed in the steel billet coating material and to form uniform base-material film on billet surface in order to make, can be with the size range below base-material grinding to 200 order, preferably, with base-material grinding to 200 order.
Using method according to steel billet coating material of the present invention will be described below.At first, the steel billet that will apply high temperature resistant steel billet coating is cleaned, for example, can utilize high pressure gas that the billet surface winding-up is clean; Then, the coating that configures is coated on the surface of steel billet equably by spraying or brushing technique, and in coating procedure, with the gauge control of paint coatings between 0.2mm～0.8mm; Treat that steel billet can be sent into process furnace after coating is dried heat-treats.
Steel billet coating material according to the present invention has good low temperature adhesion property, and coating is molten state and sticks to billet surface in high-temperature heat treatment process, can completely cut off contacting of steel billet and oxygen fully, thereby has reduced the oxidation and decarbonization speed of steel billet.In addition, in the process of cooling of steel billet, because steel billet is different with the shrinking percentage of coat, thereby coating can come off voluntarily, therefore can follow-up technology not exerted an influence.In addition, steel billet coating material of the present invention uses the main raw material of flyash as base-material, not only can reduce consumption to mineral wealth, can also recycle fly ash, thereby reduce surrounding environment is worked the mischief owing to the discharging of flyash, and improved the resource circulation utilization ratio, helped improving the environmental friendliness degree.
Explain effect of the present invention with reference to concrete example below.
Example 1
The fireclay of the ordinary fly ash of 58wt% and 2wt% is mixed below grinding to 200 order of back, with the preparation base-material, then the base-material that obtains is mixed with the silica sol binder of 40wt% and stir, to prepare high temperature resistant steel billet coating.
Example 2
The fireclay of the ordinary fly ash of 53wt% and 5wt% is mixed below grinding to 200 order of back, with the preparation base-material, then the base-material that obtains is mixed with the potassium-sodium water glass binding agent of 42wt% and stir, to prepare high temperature resistant steel billet coating.
Example 3
The fireclay of the ordinary fly ash of 45wt% and 15wt% is mixed below grinding to 200 order of back, with the preparation base-material, then the base-material that obtains is mixed with the biphosphate al binder of 40wt% and stir, to prepare high temperature resistant steel billet coating.
Example 4
The fireclay of the high-carbon fly ash of 53wt% and 5wt% is mixed below grinding to 200 order of back, with the preparation base-material, then the base-material that obtains is mixed with the silica sol binder of 42wt% and stir, to prepare steel billet coating material.
Example 5
The fireclay of the ordinary fly ash of 50wt% and 5wt% is mixed below grinding to 200 order of back, with the preparation base-material, then the base-material that obtains is mixed with the silica sol binder of 45wt% and stir, to prepare high temperature resistant steel billet coating.
The surface of steel billet test specimen is carried out after deashing and the oil removal treatment, will according to the steel billet coating material brushing of above-mentioned example and comparative examples on the surface of steel billet test specimen, then, under physical environment, coating be dried.The steel billet test specimen handled well was placed in 1250 ℃ the process furnace insulation 3 hours with undressed steel billet test specimen, measures the practical decarburized depth of steel billet then, list in result's table 1 below of acquisition.
Table 1
As can be seen from Table 1, the practical decarburized depth of the steel billet test specimen after utilization example 1 according to the present invention to the steel billet coating material of example 5 is handled obviously reduces, therefore as can be seen, can play the good anti-oxidation and the effect of decarburization according to steel billet coating material of the present invention.In addition,, utilize the steel billet coating material that adopts high carbonaceous powder coal ash (its carbon content is by weight greater than 20%) and silicon sol, can prevent oxidation and decarburization better according to example 4.
Therefore, can reduce the oxidation and decarbonization speed of steel billet, help improving the environmental friendliness degree simultaneously according to steel billet coating material of the present invention.
Described specific embodiment of the present invention, yet it should be appreciated by those skilled in the art that under the situation that does not break away from the scope of the present invention that is defined by the claims, can carry out various modifications and change these embodiment.
Claims (12)
1. steel billet coating material, described steel billet coating material comprises base-material and binding agent, described base-material comprises flyash and fireclay, wherein, the content of flyash is 45wt% to 58wt%, and the content of fireclay is 2wt% to 15wt%, and the content of binding agent is 40wt% to 45wt%.
2. steel billet coating material as claimed in claim 1, wherein, described flyash comprises the silicon-dioxide of 40～60wt%, the aluminium sesquioxide of 10～30wt%, the ferric oxide of 1～3wt%, fixed carbon and other unavoidable impurities of 1～35wt%.
3. steel billet coating material as claimed in claim 2, wherein, the content of the fixed carbon in the described flyash is greater than 20%.
4. steel billet coating material as claimed in claim 1, wherein, described fireclay comprises the silicon-dioxide of 40～60wt% and the aluminium sesquioxide of 40～60wt%.
5. steel billet coating material as claimed in claim 1, wherein, described binding agent is at least a in silicon sol, potassium-sodium water glass, the aluminium dihydrogen phosphate.
6. method of making steel billet coating material, this method may further comprise the steps:
Flyash and fireclay are mixed with the preparation base-material;
The base-material that obtains is carried out grinding;
Add binding agent in the base-material behind grinding and stir,
Wherein, the content of flyash is 45%wt to 58wt%, and the content of fireclay is 2wt% to 15wt%, and the content of binding agent is 40wt% to 45wt%.
7. method as claimed in claim 6, wherein, in the step of grinding with below base-material grinding to 200 order.
8. method as claimed in claim 6, wherein, the fusing point of base-material is between 1250 ℃ to 1300 ℃.
9. method as claimed in claim 6, wherein, described flyash comprises the silicon-dioxide of 40～60wt%, the aluminium sesquioxide of 10～30wt%, the ferric oxide of 1～3wt%, fixed carbon and other unavoidable impurities of 1～35wt%.
10. method as claimed in claim 9, wherein, the content of the fixed carbon in the described flyash is greater than 20wt%.
11. method as claimed in claim 6, wherein, described fireclay comprises the silicon-dioxide of 40～60wt% and the aluminium sesquioxide of 40～60wt%.
12. method as claimed in claim 6, wherein, described binding agent is at least a in silicon sol, potassium-sodium water glass, the aluminium dihydrogen phosphate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011100920753A CN102219533A (en) | 2011-04-13 | 2011-04-13 | Billet coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100920753A CN102219533A (en) | 2011-04-13 | 2011-04-13 | Billet coating and preparation method thereof |
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| CN102219533A true CN102219533A (en) | 2011-10-19 |
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| CN2011100920753A Pending CN102219533A (en) | 2011-04-13 | 2011-04-13 | Billet coating and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103467139A (en) * | 2013-08-26 | 2013-12-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Antioxidation paint made from carbonaceous material as well as preparation and construction processes of antioxidation paint |
| CN103951450A (en) * | 2014-04-29 | 2014-07-30 | 常州市润源经编机械有限公司 | Fixing paste for heat treatment of metal workpiece |
| CN103964808A (en) * | 2013-01-28 | 2014-08-06 | 李军 | Composite coating material and production method thereof |
| CN107083083A (en) * | 2017-04-11 | 2017-08-22 | 石家庄钢铁有限责任公司 | A kind of coating for preventing that low Ni descaling of steel stock is not net and application method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101215175A (en) * | 2007-12-29 | 2008-07-09 | 大连交通大学 | Lightweight flame-proof thermal insulation material and preparation method thereof |
| CN101514110A (en) * | 2009-03-25 | 2009-08-26 | 阮克胜 | Red mud and fly ash fireproof insulation brick |
| CN101922203A (en) * | 2009-06-16 | 2010-12-22 | 高俊荣 | Refractory heat-insulation brick |
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2011
- 2011-04-13 CN CN2011100920753A patent/CN102219533A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215175A (en) * | 2007-12-29 | 2008-07-09 | 大连交通大学 | Lightweight flame-proof thermal insulation material and preparation method thereof |
| CN101514110A (en) * | 2009-03-25 | 2009-08-26 | 阮克胜 | Red mud and fly ash fireproof insulation brick |
| CN101922203A (en) * | 2009-06-16 | 2010-12-22 | 高俊荣 | Refractory heat-insulation brick |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964808A (en) * | 2013-01-28 | 2014-08-06 | 李军 | Composite coating material and production method thereof |
| CN103467139A (en) * | 2013-08-26 | 2013-12-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Antioxidation paint made from carbonaceous material as well as preparation and construction processes of antioxidation paint |
| CN103467139B (en) * | 2013-08-26 | 2015-02-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Antioxidation paint made from carbonaceous material as well as preparation and construction processes of antioxidation paint |
| CN103951450A (en) * | 2014-04-29 | 2014-07-30 | 常州市润源经编机械有限公司 | Fixing paste for heat treatment of metal workpiece |
| CN103951450B (en) * | 2014-04-29 | 2016-01-20 | 常州市润源经编机械有限公司 | A kind of for the heat treated fixing cream of metal works |
| CN107083083A (en) * | 2017-04-11 | 2017-08-22 | 石家庄钢铁有限责任公司 | A kind of coating for preventing that low Ni descaling of steel stock is not net and application method and application |
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Application publication date: 20111019 |