CN110369242A - A kind of manufacturing process of anti-oxidation scaling loss substrate and anti-oxidation scaling loss steel billet product - Google Patents
A kind of manufacturing process of anti-oxidation scaling loss substrate and anti-oxidation scaling loss steel billet product Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/444—Halide containing anions, e.g. bromide, iodate, chlorite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
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Abstract
The invention discloses a kind of manufacturing process of anti-oxidation scaling loss substrate and anti-oxidation scaling loss steel billet products, belong to fire-proof material anti-oxidation scaling loss technical field of coatings.Manufacturing technology steps include: that fleur is coated on substrate surface firstly, after the floating ash of cleaning substrate surface, to fill the recess gap of substrate surface, then coat anti-oxidation scaling loss coating to substrate whole surface；Wherein, fleur refers to the substrate whole surface of coating in a manner of face, and fleur, which selectively coats, to be referred to for filling substrate surface recess, carries out part coating.Further, when the substrate is steel billet, anti-oxidation scaling loss steel billet is obtained, billet surface successively includes fleur layer and anti-oxidation scaling loss coating.Method of the invention is simple, easily operated, and in the case where being not necessarily to grinding process substrate, improves the tightness of substrate and anti-oxidation scaling loss coating, reduce the oxidization burning loss rate of substrate.
Description
Technical field
The invention belongs to fire-proof material anti-oxidation scaling loss technical field of coatings, more particularly to a kind of anti-oxidation scaling loss substrate
Manufacturing process and anti-oxidation scaling loss steel billet product.
Background technique
Some substrates for needing high-temperature heating treatment to be processed are generally required to consider in production and processing field
Substrate whether can oxidization burning loss at high temperature, once substrate is easy there are oxidization burning loss, the oxidization burning loss for how reducing substrate is
The problem of enterprise's urgent need to resolve.It is readily apparent that, the coating made of substrate surface coating refractory material can protect substrate, subtract
Its oxidization burning loss less.But this just needs substrate surface relatively flat, coating just can more be close to substrate, reduce substrate and oxygen
The contact area of the property changed gas.In fact, being only the intermediate process of substrate processing for high-temperature heating, polishing substrate surface compares
Time-consuming, labour-consuming is not suitable for large batch of production and processing.This just needs to develop a kind of manufacturing process, in save the cost, improves production
While efficiency, efficiently guarantee the quality of substrate.
Particularly, it needs to be heated at high temperature softening before steel manufacture field, billet rolling.However in Furnace Production Process
In, with the ferro element of billet surface oxidation reaction occurs for furnace internal oxidition gas under the high temperature conditions, causes different degrees of oxygen
Change scaling loss, reduces the lumber recovery of steel.Some manufacturers also once adopt various measures, such as control to reduce oxidization burning loss
Atmosphere, the pressure of raising high pressure water, iron clad skin etc. on steel billet in heating furnace, but the effect is unsatisfactory.Due to anti-oxidation painting
Expect that Protection Code has small investment, simple operation and other advantages, be therefore widely used in major steel mill to reduce billet oxidization burning loss,
Improve lumber recovery.It is a kind of preferable method that the oxidization burning loss during heat steel is prevented using antioxidizing paint, still
This kind of coating application conditions are more harsh, generally require to carry out workpiece surface sandblasting polishing and solvent cleaning, but for shape
The irregular steel billet of shape, its surface heavy workload of polishing, and also billet rolling is the intermediate process that steel are become a useful person, at this time to steel
The essence polishing of material is the workload being not necessarily to, and cost is larger, reduces production efficiency.And existing antioxidizing paint construction method
To brush or spraying.
However during anti-oxidation scaling loss coating application, the phenomenon that there are out-of-flatnesses due to billet surface, and steel billet with
Anti-oxidation scaling loss coating form is different, there is gap between the two, causes the coating coated in billet surface uneven.High temperature
Under, even if being coated with anti-oxidation scaling loss coating, it is not oxidized steel billet can not to be completely secured.
For example, Chinese Patent Application No. is 201810676394.0, application publication date is the patent on November 16th, 2018
Application documents disclose a kind of coating against binding slags for hot-rolling heating furnace water beam heat preservation lining.The coating against binding slags of the patent include
The raw material of following weight percent: 40~55% forsterite, 15~25% magnesite clinker, 1~4% raw bauxite are thin
Powder, 8~15% active alpha-Al2O3Micro mist, 10~25% silica solution, 3~6% silicon carbide micro-powder and 1~3% scale
Graphite.Coating against binding slags described in the invention be suitable for high proportion iron oxide content steel slag working condition, be isolated water beam and
Column fire resistant heat preserving is served as a contrast to be contacted with the direct of iron oxide slag, can be prevented the infiltration and erosion of iron oxide slag, be reduced coating
Interface aoxidizes the freezing point of scum, and conducive to the smooth trickling of slag, the dry slag dross for effectively inhibiting fire resistant heat preserving to serve as a contrast is convenient for
Cleaning and maintenance extends the service life of fire resistant heat preserving lining, conducive to the raising of production efficiency and billet quality.But due to coating
For liquid, steel billet is solid-state, and billet surface out-of-flatness, coating material often unavoidably have gap on steel billet therewith,
Under high temperature, before coating does not soften also, interstitial air leads in the high-temperature heating softening process of steel billet before the rolling that there are one
Fixed oxidization burning loss.
For another example, Chinese Patent Application No. 2017101130326, the patent Shen that application publication date is on 06 27th, 2017
Please file disclose a kind of color steel tile and preparation method thereof with equadag coating.The patent color steel tile includes the substrate of middle layer,
Its two sides is painted with the coating of graphite slurry formation；Wherein graphite slurry is made of following material by weight: thin
50-200 parts of crystalline flake graphite micro mist, cashew nut oil modified alkyd resin or 40-160 parts of epoxy resin, Pioloform, polyvinyl acetal 10-50
Part, 40-160 parts of alcohol, 2-10 parts of coupling agent, 2-10 parts of defoaming agent, 1-10 parts of plasticizer, 2-10 parts of liquid nitrile rubber.It should
The obtained color steel tile with equadag coating is invented, can significantly be prolonged its service life；Solve the easy to be old of conventional resins watt
The problems such as change, strength and toughness is low, not fire-retardant；Solve traditional color steel tile weight weight, difficult installation question；Interior can also effectively be increased
Outdoor rate of heat exchange solves the problems, such as traditional color steel tile high temperature factory harsh environments；Also solve the thin scale stone of existing market
The black low value-added problem of bulk deposition.Refer to coarse due to surface quality of billet in the patent, steel billet density is much larger than stone
Ink pulp layer density, it is compound stronger in order to allow graphite feed pulp layer and steel billet to bond, therefore added crystalline flake graphite in coating,
But it should be still the viscous liquid with resin with the coating of graphite, it is not able to satisfy wanting for filling billet surface out-of-flatness
It asks.
Therefore, in order to reduce the oxidization burning loss rate before billet rolling, the quality of steel billet is improved, needs to develop a kind of anti-oxidation
The manufacturing process of scaling loss substrate and anti-oxidation scaling loss steel billet product.
Summary of the invention
1, it to solve the problems, such as
For existing substrate surface out-of-flatness, the especially steel billet of surface irregularity, anti-oxidation scaling loss coating and steel billet it
Between can have gap, cause steel billet in heating process that can also lead to the problem of iron scale, the present invention provides a kind of raising steel billet
The manufacturing process of oxidation proof propertiess.By effectively filling the recess gap of billet surface, billet surface and anti-oxidation burning are reduced
The gap between coating is damaged, so that the oxidizing gas contact surface in steel billet and heating furnace is reduced, and then anti-oxidation scaling loss coating
Anti-oxidation scaling loss effect reaches optimum efficiency at high temperature, improves the quality of steel billet, in the feelings without polish steel billet and low cost
Under condition, oxidization burning loss rate when heating steel billet is reduced.
The present invention also provides a kind of anti-oxidation scaling loss steel billets, further reduced oxidization burning loss of the steel billet in high-temperature heating
Rate.
2, technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of manufacturing process of anti-oxidation scaling loss substrate, firstly, after the floating ash of cleaning substrate surface, by fleur with face
Mode is selectively coated in substrate depression in the surface gap, forms very thin powdery filled layer, then whole to substrate
A surface coats anti-oxidation scaling loss coating, forms anti-oxidation scaling loss coating；Wherein, fleur refers to coating in a manner of face
Substrate whole surface, fleur, which selectively coats, to be referred to for bigger recess obvious on filling substrate, is carried out
Part is coated with.
Further, the coating method of the fleur is to dip in full graphite painting in substrate table with hairbrush or round brush
Face.
Further, the coating method of the fleur is directly to fall graphite powder in substrate surface, then use hairbrush
Or round brush substrate surface.
Further, the coating method of the fleur is the mode that machine coats automatically.
Further, the fleur is the granular materials that lubricity is good and fusing point is high, and preferably powdered filler is
Graphite powder.
Further, the granularity of the graphite powder is 200~400 mesh.
Further, the granularity of the graphite powder is preferably 325 mesh.
Further, the graphite powder is the crystalline flake graphite of phosphorus content >=94%.
Further, the substrate is the steel billet of all carbon containing steel billets and different shape dimensions.
Further, the anti-oxidation scaling loss layer is preferably anti-oxidation scaling loss coating containing the fleur or has anti-
The interleaving agent of oxidization burning loss effect.
Further, the anti-oxidation scaling loss coating graphitiferous powder, formula are as follows: 50~80 parts of magnesite clinker, graphite powder
20~40 parts, 2~10 parts of silica solution, 5~20 parts of high temperature adhesives, water, the additional amount of the water is the total matter of aforementioned four kinds of components
The 15~25% of amount；Wherein, the high temperature adhesives are selected from one of calgon, magnesium chloride, sodium tripolyphosphate or several
Kind.
Further, the preferred crystalline flake graphite of graphite powder in the anti-oxidation scaling loss coating.
A kind of anti-oxidation scaling loss steel billet that above-mentioned manufacture craft obtains, billet surface successively include fleur layer and
Anti-oxidation scaling loss coating.
3, beneficial effect
Compared with the existing anti-oxidation scaling loss technology of coating, the invention has the following advantages that
(1) manufacturing process of the invention first smears one layer of very thin powder before applying anti-oxidation scaling loss layer in substrate surface
Shape filler, because coating has certain viscosity, even if can only be filled the powdery of coated substrate in the process brushed or sprayed
The floating ash of object removes, and also there are fleurs on substrate, it is possible to reduce the gap between substrate and anti-oxidation scaling loss layer is not having to
In the case where substrate surface flatness of polishing, keeps anti-oxidation scaling loss layer and substrate more docile, anti-oxidation scaling loss can be effectively improved
The oxidation-protective effect of layer, is effectively reduced the oxidization burning loss of substrate, does not influence the surface quality of the uniform substrate of base material heated, thus
Improve the oxidation-protective effect of anti-oxidation scaling loss layer；
(2) fleur of the invention is the material that fusing point is high and lubricity is good, is not easy deformation at high temperature, and not
It easily falls and is closely attached on substrate, preferentially select graphite powder for fleur, for filling steel billet substrate surface recess,
On the one hand, start to aoxidize at 500 DEG C due to graphite, oxidation reaction occurs with oxygen at 800 DEG C or so, and coating is at 750 DEG C or so
Start to soften, therefore, before coating softening, oxidation reaction preferentially occurs for graphite powder, and graphite nor affects on post-coatings in height
To the anti-oxidation effect of substrate under temperature；On the other hand, increased graphite powder, at normal temperature, graphite powder can be sufficient filling with steel billet
Gap at surface indentation, and graphite powder is one of the formula components of anti-oxidation scaling loss layer, and it can closely connect anti-oxidation burning
Layer and steel billet are damaged, so that anti-oxidation scaling loss layer is uniformly coated on billet surface；Finally, at high temperature, graphite powder is heated and oxygen
Oxidation reaction occurs and generates CO2Or CO, can preferential oxidation, protect steel billet, do not add any impurity, it is heated equal not influence steel billet
Even and surface quality substantially increases the oxidation-protective effect of anti-oxidation scaling loss coating；
(3) granularity of graphite powder of the invention is 200~400 mesh, it is ensured that the partial size of graphite powder is sufficiently fine, Ke Yichong
Divide the gap of filling substrate surface, reduce the contact area of substrate and gas, reduce the oxidization burning loss rate of substrate, guarantees substrate
Quality；
(4) graphite powder of the invention preferentially selects crystalline flake graphite, and natural flake graphite is a kind of high-quality refractory material raw material,
It is high-carbon graphite of the phosphorus content between 94~99%, and crystallization is complete, and piece is thin and good toughness, and physical and chemical performance is excellent, has
Good lubricity, plasticity, heat conductivity, electric conductivity, thermal shock resistance and corrosion resistance etc. are attached between steel billet at present
Put forth effort stronger material；
(5) contain in use in anti-oxidation scaling loss formulation for coating material of the invention containing the fleur accordingly used
Before the anti-oxidation scaling loss coating coating steel billet of crystalline flake graphite, first carried out using crystalline flake graphite powder at the out-of-flatness of billet surface
Filling, can effectively make it is closely coupled between fleur layer and anti-oxidation scaling loss coating, make steel billet, fleur layer and
Adhesive force between anti-oxidation scaling loss coating three is bigger, and gap is smaller；
(6) manufacture craft of the invention greatly improves anti-oxidation scaling loss coating using effect, can effectively reduce billet oxidization
Burn out rate 90% or so improves the effect of anti-oxidation scaling loss coating, and the billet surface after dephosphorization is smooth, and bright in color is equal
It is even, surface quality of billet is improved, lumber recovery is improved；
(7) manufacture craft operating method of the invention is simple, and performance is stablized, at low cost, suitable for hand spray and online
Spraying；While improving the oxidation-protective effect of anti-oxidation scaling loss coating at high temperature, to steel billet without harmful erosion, to environment without
Pollution；
(8) anti-oxidation scaling loss steel billet of the invention is coated with anti-oxidation scaling loss coating thereon and plays a protective role to steel billet,
When coating does not soften also at high temperature, melts, spreading, the preferentially air oxidation between steel billet-coating of fleur layer, protection
Steel billet, coating start to soften at 750 DEG C or so, and at high temperature, coating softens to form fine and close protective layer, can be effectively reduced steel
The contact area of base and oxidizing gas reduces its oxidization burning loss rate；By the physical-chemical reaction between each layer component, generate very
Fine and close oxidation film prevents metallic atom from inwardly spreading to external diffusion and oxygen atom, to reduce the oxidation rate of steel billet, produces
Sintering phase under raw different temperatures, having both low and high temperature prevents from aoxidizing；
(9) more, the of the invention anti-oxidation scaling loss steel billets higher than metal process temperature due to billet rolling heating temperature
It can be entirely capable of the anti-oxidation requirement of steel that reaches a high temperature, the fleur layer and anti-oxidation scaling loss coating coated thereon, heatproof
It can achieve 1300 DEG C, the time was heated at high temperature up to 2~6 hours, and fleur layer uses the squama of nanometer fish scale-like structure
Piece graphite, is oxidized to CO at high temperature2Or CO, the concentration of furnace internal oxidition atmosphere is reduced to a certain extent, can effectively be protected
It is not oxidized under shield metallic high temperature, make ferrous metal oxidization burning loss rate lower than 5% or less；
(10) formation of fleur layer of the invention does not need be heat-treated or makes coating uniform by pressure,
One layer of very thin fleur only need to be smeared, can be closely adhered on matrix, the oxidization burning loss situation of matrix can be reduced,
Improve the service life of matrix.
Specific embodiment
Below by specific embodiment, the present invention is further elaborated, but these embodiments are not to do to the present invention
Any restrictions.Those skilled in the art will fall in power to any variation done in present invention implementation under the enlightenment of specification
In the range of sharp claim.
Embodiment 1
A kind of manufacturing process of anti-oxidation scaling loss substrate of the present embodiment is substrate for 45# straight carbon steel, is clearing up steel
After the floating ash in base surface, using 325 mesh crystalline flake graphites of 98% phosphorus content, graphite powder is applied to steel slab surface using round brush,
The steel billet anti-oxidation scaling loss coating of manual brushing 0.3mm thickness again.
Specific step are as follows:
(1) billet surface pre-processes: the floating ash of cleaning billet surface；
(2) it coating of powdered filler: in the either obvious out-of-flatness recess larger part of billet surface, is dipped in hairbrush or round brush
Full graphite painting forms the fleur layer with a thickness of 0.05~0.1mm in billet surface；
(3) anti-oxidation scaling loss coating is prepared: by 59 parts of magnesite clinker, 28 parts of carbon dust, 10 parts of silica solution, calgon 8
Part, 20% water that quality is aforementioned four kinds of component gross masses is added after mixing, then stirs evenly, stirs in planetary ball mill
It mixes and crosses 400 mesh screens after forty minutes, anti-oxidation scaling loss coating is made；
(4) it is coated with anti-oxidation scaling loss coating: anti-oxidation scaling loss coating made from step (3) is sprayed at through at step (2)
The 45# straight carbon steel surface of reason, paint thickness 0.3mm after spontaneously drying coating, are placed in heating furnace and heat, with temperature
Raising, fleur graphite starts to aoxidize at 500 degree, and coating starts to soften at 750 degree or so, as the temperature rises,
At 1100 degree or so, it is melted into liquid completely, is wrapped in billet surface, furnace high-temperature gas is isolated, is formed in billet surface
Fine and close anti-oxidation scaling loss coating, obtains the low steel billet of high-temperature oxydation burn out rate of the invention.
High pressure water dephosphorization is used after 1250 DEG C of high-temperature heating 4.0h, billet surface gloss is uniform, noresidue, before spraying
Steel billet weight is 1506g, and steel billet weight is 1513g after spraying, and weight (after dephosphorization) is 1503.7g after heating steel billet, obtains oxygen
Changing burn out rate is 0.15%.
And graphite powder is not smeared, anti-oxidation scaling loss coating is directly brushed under same heating condition, and oxidization burning loss rate is
0.20%, obtaining the billet oxidization burning loss rate that method of the invention obtains reduces 0.05%.
Wherein, oxidization burning loss rate calculation formula: oxidization burning loss rate (%)=(before spraying after steel billet weight (g)-heating steel billet
Weight (g))/spray preceding steel billet weight (g) × 100%.
It is worth noting that in actual production, it is the graphite powder of 200~400 mesh as powdery that inventor, which uses granularity,
Filler, obtained billet oxidization burning loss rate is below 0.20%, than not smearing graphite powder, directly brushes anti-oxidation scaling loss coating
Billet oxidization burning loss rate it is low.
More importantly anti-oxidation scaling loss coating of the invention is not limited to the formulation for coating material that the present invention refers to, Ren Hefang
Oxidization burning loss coating can achieve the effect that the product that manufacture craft of the present invention obtains.
Embodiment 2
A kind of manufacturing process of the anti-oxidation scaling loss substrate of the present embodiment.It is substantially the same manner as Example 1, difference
Are as follows: being directed to non-orientation silicon steel is substrate, after having cleared up the floating ash of steel slab surface, using 325 mesh scale stones of 98% phosphorus content
Ink directly falls crystalline graphite powder in billet surface, then with hairbrush or round brush billet surface, then the steel of manual brushing 0.3mm thickness
The anti-oxidation scaling loss coating of base.
Specific step are as follows:
(1) billet surface pre-processes: the floating ash of cleaning billet surface；
(2) coating of powdered filler: in the either obvious out-of-flatness recess larger part of billet surface, crystalline graphite powder is straight
It connects down in billet surface, then with hairbrush or round brush billet surface, forms the fleur layer with a thickness of 0.06mm；
(3) anti-oxidation scaling loss coating is prepared: by 50 parts of magnesite clinker, 20 parts of carbon dust, 2 parts of silica solution, calgon, chlorine
Change magnesium and 5 parts of sodium tripolyphosphate mixture, 15% water that quality is aforementioned six kinds of component gross masses is added after mixing, then exists
Planetary ball mill stirs evenly, and 400 mesh screens are crossed in stirring after forty minutes, and anti-oxidation scaling loss coating is made；
(4) it is coated with anti-oxidation scaling loss coating: anti-oxidation scaling loss coating made from step (3) is sprayed at through at step (2)
The non-orientation silicon steel of reason, paint thickness 0.4mm after spontaneously drying coating, are placed in heating furnace and heat, with the liter of temperature
Height, fleur graphite start to aoxidize at 500 degree, and coating starts to soften at 750 degree or so, as the temperature rises,
At 1100 degree or so, it is melted into liquid completely, is wrapped in billet surface, furnace high-temperature gas is isolated, is formed and is caused in billet surface
Close anti-oxidation scaling loss coating obtains anti-oxidation scaling loss steel billet of the invention.
High pressure water dephosphorization is used after 1250 DEG C of high-temperature heating 4.0h, billet surface gloss is uniform, noresidue, before spraying
Steel billet weight is 1635g, and steel billet weight is 1643g after spraying, and weight is 1632g after heating steel billet, and obtaining oxidization burning loss rate is
0.18%.
And graphite powder is not smeared, anti-oxidation scaling loss coating is directly brushed under same heating condition, and oxidization burning loss rate is
0.24%, obtaining the billet oxidization burning loss rate that method of the invention obtains reduces 0.06%.
Wherein, oxidization burning loss rate calculation formula: oxidization burning loss rate (%)=(before spraying after steel billet weight (g)-heating steel billet
Weight (g))/spray preceding steel billet weight (g) × 100%.
It is worth noting that in actual production, it is the graphite powder of 200~400 mesh as powdery that inventor, which uses granularity,
Filler, obtained billet oxidization burning loss rate is below 0.24%, than not smearing graphite powder, directly brushes anti-oxidation scaling loss coating
Billet oxidization burning loss rate it is low.
More importantly anti-oxidation scaling loss coating of the invention is not limited to the formulation for coating material that the present invention refers to, Ren Hefang
Oxidization burning loss coating can achieve the effect that the product that manufacture craft of the present invention obtains.
Embodiment 3
A kind of manufacturing process of the anti-oxidation scaling loss substrate of the present embodiment.The present embodiment is directed to carbon containing refractory, specifically
For aluminium carbonaceous submersed nozzle.It, will using 325 mesh crystalline flake graphites of 98% phosphorus content after having cleared up the floating ash of steel slab surface
Crystalline graphite powder hairbrush or round brush are coated on aluminium carbonaceous mouth of a river surface, then brush the antioxidizing paint of 0.3mm thickness.
Specific step are as follows:
(1) aluminium carbonaceous submersed nozzle surface preparation: the floating ash in the surface of cleaning aluminium carbonaceous submersed nozzle；
(2) coating of powdered filler:, will in the either obvious out-of-flatness recess larger part in aluminium carbonaceous submersed nozzle surface
Crystalline graphite powder hairbrush or round brush are coated on aluminium carbonaceous submersed nozzle surface, form the fleur with a thickness of 0.05mm
Layer；
(3) prepare antioxidizing paint: antioxidizing paint mainly has 59 parts of kaolin, B420 parts of C, 21 parts of glass powder, carboxylic first
0.5 part of base cellulose, after mixing, suitable water is added, stirs, stands 12h；
(4) it is coated with anti-oxidation scaling loss coating: anti-oxidation scaling loss coating made from step (3) is sprayed at through at step (2)
On the aluminium carbonaceous submersed nozzle of reason, paint thickness 0.3mm dries in the shade；Inoxidzable coating is formed at high temperature, obtains the present invention
Anti-oxidation scaling loss aluminium carbonaceous submersed nozzle.
After 110 DEG C of baking 4h, then through 1000 DEG C of high temperature firings, after keeping the temperature 3h, measured practical decarburized depth is
0.3mm；Under 1500 DEG C of applied at elevated temperature, inoxidzable coating can be subjected to the high temperature of 6h.
And graphite powder is not smeared, directly brushing antioxidizing paint is burnt after 110 DEG C of baking 4h, then through 1000 DEG C of high temperature
At after keeping the temperature 3h, the practical decarburized depth of aluminium carbonaceous submersed nozzle is 0.5mm；Under 1500 DEG C of applied at elevated temperature, anti-oxidation painting
Layer can only be subjected to the high temperature of 4.5h.
Above data shows that method of the invention effectively increases the oxygen of antioxidizing paint on aluminium carbonaceous submersed nozzle
Change effect, improves its service life.
More importantly anti-oxidation scaling loss coating of the invention is not limited to the formulation for coating material that the present invention refers to, Ren Hefang
Oxidization burning loss coating can achieve the effect that the product that manufacture craft of the present invention obtains.
Comparative example 1
This comparative example is substantially the same manner as Example 1, the difference is that: the 45# straight carbon steel steel billet of this comparative example is not coated with
Graphite bisque is smeared, anti-oxidation scaling loss coating is directly brushed.
Comparative example 2
This comparative example is substantially the same manner as Example 2, the difference is that: the non-orientation silicon steel steel billet of this comparative example is not coated with
Graphite bisque is smeared, anti-oxidation scaling loss coating is directly brushed.
Comparative example 3
This comparative example is substantially the same manner as Example 2, the difference is that: the aluminium carbonaceous submersed nozzle of this comparative example is not
Graphite bisque is smeared, directly brushing antioxidizing paint.
Embodiment 4
The performance test of the anti-oxidation scaling loss steel billet of the present invention
By according to all anti-oxidation scaling loss substrates (embodiment of the present invention 1~3, comparative example 1~3) of above-mentioned manufacture, to it
The performances such as appearance, anti-oxidation scaling loss performance are tested, and show the result in table 1.
1 embodiment of the present invention of table and comparative example evaluation result
Wherein, oxidization burning loss rate calculation formula: oxidization burning loss rate (or rate of weight loss) (%)=(spray preceding substrate weight
(g)-weight (g) after substrate heating)/substrate weight (g) × 100% before spraying.
Example of the present invention is only that preferred embodiments of the present invention will be described, not to present inventive concept and
Range is defined, and under the premise of not departing from design philosophy of the present invention, this field engineers and technicians are to technology of the invention
The various changes and improvements that scheme is made should all fall into protection scope of the present invention.
Claims (10)
1. a kind of manufacturing process of anti-oxidation scaling loss substrate, it is characterised in that: first by fleur in a manner of face or selection
Property be coated in the recess gap of substrate surface, form very thin powdery filled layer, then oxygen is coated to substrate whole surface
Change scaling loss coating, forms anti-oxidation scaling loss coating.
2. a kind of manufacturing process of anti-oxidation scaling loss substrate according to claim 1, it is characterised in that: the powdery filling
The coating method of object is to be coated with hairbrush or round brush.
3. a kind of manufacturing process of anti-oxidation scaling loss substrate according to claim 1, it is characterised in that: the powdery filling
The coating method of object is the mode that machine coats automatically.
4. a kind of manufacturing process of anti-oxidation scaling loss substrate according to any one of claims 1 to 3, it is characterised in that:
The preferred graphite powder of fleur.
5. a kind of manufacturing process of anti-oxidation scaling loss substrate according to claim 4, it is characterised in that: the graphite powder
Granularity is 200~400 mesh.
6. a kind of manufacturing process of anti-oxidation scaling loss substrate according to claim 5, it is characterised in that: the graphite powder
Granularity is 325 mesh.
7. a kind of manufacturing process of anti-oxidation scaling loss substrate according to claim 5~6 any one, it is characterised in that:
The graphite powder is the crystalline flake graphite of phosphorus content >=94%.
8. a kind of manufacture craft for improving substrate oxidation proof propertiess according to claim 1, it is characterised in that: the base
Material is mild steel of the phosphorus content less than 0.25%.
9. a kind of manufacture craft for improving substrate oxidation proof propertiess according to claim 1, it is characterised in that: the oxygen
Changing scaling loss layer is preferably the anti-oxidation scaling loss coating containing the fleur.
10. the anti-oxidation scaling loss steel billet that manufacture craft described in a kind of claim 1~9 obtains, it is characterised in that: billet surface
It successively include fleur layer and anti-oxidation scaling loss coating.
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Application publication date: 20191025 |