CN107083083A - A kind of coating for preventing that low Ni descaling of steel stock is not net and application method and application - Google Patents
A kind of coating for preventing that low Ni descaling of steel stock is not net and application method and application Download PDFInfo
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- CN107083083A CN107083083A CN201710232098.7A CN201710232098A CN107083083A CN 107083083 A CN107083083 A CN 107083083A CN 201710232098 A CN201710232098 A CN 201710232098A CN 107083083 A CN107083083 A CN 107083083A
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- 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
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Abstract
The invention discloses a kind of coating for preventing that low Ni descaling of steel stock is not net and application method and application, the coating material is inorganic composite materials, is mainly made up of the powder, inorganic composite adhesive and function ingredients of high-melting-point substances；The powder composition of high-melting-point substances and account for coating material gross mass percentage in the coating and be：SiC：10~25%, SiO2：10~30%, Al2O3：17~57%, TiO2：5~13%,（MgO+Cr2O3）：5~30%；Function ingredients and account for coating material gross mass percentage in the coating and be：Graphite：3~9%, boron carbide：4~10%.Method after being well mixed with electric blender, is uniformly brushed in blank upper surface and two sides for each constituent of coating is added to the water item by item.The present invention also provides application of the coating in steel rolling.Coating of the present invention is nontoxic aqueous suspension slurry, and parent metal is not chemically reacted and penetrated into, and coating easily peels off removal after steel billet is come out of the stove, and easy construction, applicability is wide, and cost is low.
Description
Technical field
The invention belongs to Heating Process for Steel Rolling technical field, and in particular to it is a kind of prevent the unnet coating of low Ni descaling of steel stock and
Application method and application.
Background technology
Steel billet oxidization burning loss in rolling heating process is difficult to avoid, some steel alloys containing elements such as Ni, Mn, Mo,
Especially containing nickel steel, the oxide layer and steel billet adhesion formed in heating process are very firm, though through high pressure water descaling device de-scaling,
Oxide layer can not be still stripped, the press-in of iron scale, cause rolled steel surface to produce pitted skin or pit, it is necessary to be repaiied
Mill, serious even causes to scrap.Therefore, a kind of antioxidizing paint need to be developed, asking for above-mentioned " de-scaling containing nickel steel not being net " is solved
Topic, reaches that casting skin material can meet direct terms of delivery without reconditioning, can both improve surface quality of steel, and can save and be produced into
This.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of coating for preventing that low Ni descaling of steel stock is not net and application method
And application.This method effectively solves the problem of de-scaling containing nickel steel is not net in steel rolling heating process, improves surface quality of steel, subtracts
Few steel reconditioning process, saves production cost, shortens delivery date.
In order to solve the above technical problems, the present invention provides a kind of coating for preventing that low Ni descaling of steel stock is not net, the coating material
Expect for inorganic composite materials, to be mainly made up of the powder, inorganic composite adhesive and function ingredients of high-melting-point substances；The coating
The powder composition of middle high-melting-point substances and account for coating material gross mass percentage and be：SiC：10~25%, SiO2：10~30%,
Al2O3：17~57%, TiO2：5~13%,（MgO+Cr2O3）：5~30%；Function ingredients and the total matter of coating material is accounted in the coating
Measuring percentage is：Graphite：3~9%, boron carbide：4~10%.
Inorganic composite adhesive composition and account for coating material gross mass percentage in coating of the present invention and be：Concave convex rod glues
Soil：1~5%, aluminum phosphate system binding agent：5~10%.
The present invention also provides a kind of above-mentioned application method for preventing the low unnet coating of Ni descaling of steel stock, and methods described is to apply
Expect that each constituent is added to the water item by item, after being well mixed with electric blender, uniformly brush in blank upper surface and two sides
Face, the addition quality of water is the 50~60% of coating composition gross mass.
Coating application coating thickness of the present invention is 0.3-0.6mm.
Coating of the present invention is in hot rolling production process, and the heat time is 4~7h, and Preform surface temperature is after de-scaling
1060~1120 DEG C.
Coating of the present invention is in hot rolling production process, and de-scaling pressure is 20~22MPa, and de-scaling roller table speed is 0.6
~0.75m/s.
The present invention also provides a kind of application based on a kind of above-mentioned coating for preventing that low Ni descaling of steel stock is not net in steel rolling.
Coating of the present invention is applied to the low nickel steel that nickel content is 0.2~2%, scale removal effect >=98%.
It is using the beneficial effect produced by above-mentioned technical proposal：1st, coating of the present invention is nontoxic aqueous suspension material
Slurry, is all made up of inorganic material, and slurry coating adhesion is strong, can form dense protective layer starvation at high temperature, prevent
The oxidation and decarburization of metal material.2nd, coating of the present invention does not chemically react and penetrated into parent metal, to the metallographic of steel
Tissue and performance have no adverse effects, and are discharged in heating process without pernicious gas, coating easily peels off removal after steel billet is come out of the stove.3rd, originally
Invention steel billet protective coating is different from domestic other " steel billet high-temp antioxidizing paints ", breaches this technology and is served only for high added value
The limitation of heating of plate blank, has started the beginning of antioxidizing paint practical application in the heating of bar continuous casting billet.4th, coating of the present invention
Easy construction, applicability is wide, and cost is low, obvious economic, and workmen is without training, low without increasing auxiliary device
Nickel steel（Nickeliferous 0.2~2%）It is more than scale removal effect >=98%, because de-scaling not only caused by steel need to go up sharpening machine processing ratio ＜
2%。
Brief description of the drawings
Fig. 1 is the scale removal effect figure of steel billet water containing Ni of non-swabbing；
Fig. 2 is design sketch after blank is manually brushed；
Fig. 3 is the scale removal effect figure of steel billet water containing Ni of the swabbing of embodiment 1；
Fig. 4 is the scale removal effect figure of steel billet water containing Ni of the swabbing of embodiment 2；
Fig. 5 is the scale removal effect figure of steel billet water containing Ni of the swabbing of embodiment 3.
Embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1
Using steel grade：SAE8620H, steel billet contains Ni：0.47%.
Paint ingredient is constituted and weight/mass percentage composition：SiC：18%、SiO2：22%、Al2O3：30%、TiO2：6%、（MgO+
Cr2O3）：9%, attapulgite clay：2.3%th, aluminum phosphate system binding agent：5%, graphite：3.5%th, boron carbide：4.2%.According to the addition of water
Quality is the 50% of coating composition gross mass, and coating composition is added to the water item by item, well mixed with electric blender, uses broom
Remove continuous casting billet surface and retain iron scale, then uniformly brushed coating with round brush in blank upper surface and two sides, applied
Thickness degree is 0.5mm.
Blank enters step-by-step movement BF gas heating stove heat 4h, 1110 DEG C of Preform surface temperature after de-scaling, de-scaling pressure
20MPa, de-scaling roller table speed 0.7m/s.
Blank surface after de-scaling（Without two termination areas）100% iron scale is removed, and surface is without recessed after steel rolling
The defects such as hole, crackle, breach, meet delivery requirements.
Fig. 3 is the present embodiment scale removal effect figure.
Embodiment 2
Using steel grade：FAS3420H, steel billet contains Ni：0.47%.
Paint ingredient is constituted and weight/mass percentage composition：SiC：15%、SiO2：15%、Al2O3：20%、TiO2：8%、（MgO+
Cr2O3）：8%, attapulgite clay：5%th, aluminum phosphate system binding agent：10%, graphite：9%th, boron carbide：10%.According to the addition quality of water
For the 57% of coating composition gross mass, coating composition is added to the water item by item, it is well mixed with electric blender, removed with broom
Continuous casting billet surface retains iron scale, is then uniformly brushed coating with round brush in blank upper surface and two sides, applies thickness
Spend for 0.6mm.
Blank enters step-by-step movement BF gas heating stove heat 5.5h, 1108 DEG C of Preform surface temperature after de-scaling, de-scaling pressure
Power 22MPa, de-scaling roller table speed 0.75m/s.
Blank surface after de-scaling（Without two termination areas）99.5% iron scale is removed, and surface is without recessed after steel rolling
The defects such as hole, crackle, breach, meet delivery requirements.
Fig. 4 is the present embodiment scale removal effect figure.
Embodiment 3
Using steel grade：25MnCrNiMoA, steel billet contains Ni：0.45%.
Paint ingredient is constituted and weight/mass percentage composition：SiC：10%、SiO2：10%、Al2O3：57%、TiO2：5%、（MgO+
Cr2O3）：5%, attapulgite clay：1%th, aluminum phosphate system binding agent：5%, graphite：3%th, boron carbide：4%.It is according to the addition quality of water
The 52% of coating composition gross mass, coating composition is added to the water item by item, well mixed with electric blender, is removed and connected with broom
Casting billet surface retains iron scale, is then uniformly brushed coating in blank upper surface and two sides, coating layer thickness with round brush
For 0.3mm.
Blank enters step-by-step movement BF gas heating stove heat 7h, 1060 DEG C of Preform surface temperature after de-scaling, de-scaling pressure
21.5MPa, de-scaling roller table speed 0.7m/s.
Blank surface after de-scaling（Without two termination areas）99% iron scale remove, after steel rolling surface without pit,
The defects such as crackle, breach, meet delivery requirements.
Fig. 5 is the present embodiment scale removal effect figure.
Embodiment 4
Using steel grade：817M40, steel billet contains Ni：1.4%.
Paint ingredient is constituted and weight/mass percentage composition：SiC：16%、SiO2：20%、Al2O3：40%、TiO2：5%、（MgO+
Cr2O3）：5%, attapulgite clay：1.3%th, aluminum phosphate system binding agent：5%, graphite：3.5%th, boron carbide：4.2%.According to the addition of water
Quality is the 60% of coating composition gross mass, and coating composition is added to the water item by item, well mixed with electric blender, uses broom
Remove continuous casting billet surface and retain iron scale, then uniformly brushed coating with round brush in blank upper surface and two sides, applied
Thickness degree is 0.5mm.
Blank enters step-by-step movement BF gas heating stove heat 5h, 1120 DEG C of Preform surface temperature after de-scaling, de-scaling pressure
21MPa, de-scaling roller table speed 0.6m/s.
Blank surface after de-scaling（Without two termination areas）98% iron scale remove, after steel rolling surface without pit,
The defects such as crackle, breach, meet delivery requirements.
Scale removal effect figure is omited.
Embodiment 5
Using steel grade：NQT90, steel billet contains Ni：0.2%.
Paint ingredient is constituted and weight/mass percentage composition：SiC：10%、SiO2：15%、Al2O3：17%、TiO2：13%、（MgO+
Cr2O3）：30%, attapulgite clay：2.3%th, aluminum phosphate system binding agent：5%, graphite：3.5%th, boron carbide：4.2%.According to adding for water
Enter that quality is coating composition gross mass 55%, coating composition is added to the water item by item, well mixed with electric blender, with sweeping
Broom removes continuous casting billet surface and retains iron scale, is then uniformly brushed coating with round brush in blank upper surface and two sides,
Coating layer thickness is 0.4mm.
Blank enters step-by-step movement BF gas heating stove heat 4.8h, 1095 DEG C of Preform surface temperature after de-scaling, de-scaling pressure
Power 21MPa, de-scaling roller table speed 0.65m/s.
Blank surface after de-scaling（Without two termination areas）100% iron scale is removed, and surface is without recessed after steel rolling
The defects such as hole, crackle, breach, meet delivery requirements.
Scale removal effect figure is omited.
Embodiment 6
Using steel grade：30CrNiMo8, steel billet contains Ni：2%.
Paint ingredient is constituted and weight/mass percentage composition：SiC：25%、SiO2：30%、Al2O3：20%、TiO2：6%、（MgO+
Cr2O3）：5%, attapulgite clay：2%th, aluminum phosphate system binding agent：5%, graphite：3%th, boron carbide：4%.It is according to the addition quality of water
The 55% of coating composition gross mass, coating composition is added to the water item by item, well mixed with electric blender, is removed and connected with broom
Casting billet surface retains iron scale, is then uniformly brushed coating in blank upper surface and two sides, coating layer thickness with round brush
For 0.5mm.
Blank enters step-by-step movement BF gas heating stove heat 4.5h, 1115 DEG C of Preform surface temperature after de-scaling, de-scaling pressure
Power 21MPa, de-scaling roller table speed 0.65m/s.
Blank surface after de-scaling（Without two termination areas）100% iron scale is removed, and surface is without recessed after steel rolling
The defects such as hole, crackle, breach, meet delivery requirements.
Scale removal effect figure is omited.
The front and rear nickeliferous molten steel scale removal effect photo comparison of steel billet protective coating application sees Fig. 1-5.This coating can be by manually making
Brushed with round brush, speed is fast, cost is low.By blank end cooling rate is very fast and corner residual continuous casting covering slag after de-scaling
Influence, de-scaling pressure must assure that in more than 20MPa blank surface iron scale can be fully erased clean after de-scaling, in rolling
During avoid iron sheet and be rolled into steel, it is ensured that finished surface quality meets customer requirement.
Above example is only used to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacement, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
Among sharp claimed range.
Claims (8)
1. a kind of coating for preventing that low Ni descaling of steel stock is not net, it is characterised in that the coating material is inorganic composite materials, mainly
It is made up of the powder, inorganic composite adhesive and function ingredients of high-melting-point substances；In the coating powder of high-melting-point substances into
Divide and account for coating material gross mass percentage and be：SiC：10~25%, SiO2：10~30%, Al2O3：17~57%, TiO2：5~
13%,（MgO+Cr2O3）：5~30%；Function ingredients and account for coating material gross mass percentage in the coating and be：Graphite：3~
9%, boron carbide：4~10%.
2. a kind of coating for preventing that low Ni descaling of steel stock is not net according to claim 1, it is characterised in that nothing in the coating
Machine compound binding agent composition and account for coating material gross mass percentage and be：Attapulgite clay：1~5%, aluminum phosphate system binding agent：5
~10%.
3. based on a kind of application method for preventing the low unnet coating of Ni descaling of steel stock described in claim 1 or 2, it is characterised in that
Methods described after being well mixed with electric blender, is uniformly brushed in blank for each constituent of coating is added to the water item by item
Upper surface and two sides；The addition quality of the water is the 50~60% of coating composition gross mass.
4. a kind of application method for preventing the low unnet coating of Ni descaling of steel stock according to claim 3, it is characterised in that described
Coating application coating thickness is 0.3-0.6mm.
5. a kind of application method for preventing the low unnet coating of Ni descaling of steel stock according to claim 3, it is characterised in that described
Coating is in hot rolling production process, and the heat time is 4~7h, 1060~1120 DEG C of Preform surface temperature after de-scaling.
6. a kind of application method for preventing the low unnet coating of Ni descaling of steel stock according to claim 3-5 any one, it is special
Levy and be, the coating is in hot rolling production process, and de-scaling pressure is 20~22MPa, and de-scaling roller table speed is 0.6~0.75m/
s。
7. based on application of a kind of coating for preventing that low Ni descaling of steel stock is not net in steel rolling described in claim 1 or 2.
8. a kind of application of the coating for preventing that low Ni descaling of steel stock is not net according to claim 7 in steel rolling, its feature exists
In the coating is applied to the low nickel steel that nickel content is 0.2~2%, scale removal effect >=98%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232098.7A CN107083083A (en) | 2017-04-11 | 2017-04-11 | 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 Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232098.7A CN107083083A (en) | 2017-04-11 | 2017-04-11 | 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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| CN107083083A true CN107083083A (en) | 2017-08-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110451904A (en) * | 2019-07-25 | 2019-11-15 | 太原理工大学 | A kind of silane-modified fire-resistant oxidation resistant coating material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1390661A (en) * | 2002-07-25 | 2003-01-15 | 上海交通大学 | Paint for casting Mg alloy with metal mould and its preparing process |
| CN102219533A (en) * | 2011-04-13 | 2011-10-19 | 攀钢集团有限公司 | Billet coating and preparation method thereof |
| CN103774435A (en) * | 2012-10-18 | 2014-05-07 | 甘肃郝氏炭纤维有限公司 | Preparation and application methods of carbon fiber mat surface antioxidation coating |
| CN104017397A (en) * | 2014-05-27 | 2014-09-03 | 中国科学院过程工程研究所 | High-temperature protective coating for nickel base alloy steel |
-
2017
- 2017-04-11 CN CN201710232098.7A patent/CN107083083A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1390661A (en) * | 2002-07-25 | 2003-01-15 | 上海交通大学 | Paint for casting Mg alloy with metal mould and its preparing process |
| CN102219533A (en) * | 2011-04-13 | 2011-10-19 | 攀钢集团有限公司 | Billet coating and preparation method thereof |
| CN103774435A (en) * | 2012-10-18 | 2014-05-07 | 甘肃郝氏炭纤维有限公司 | Preparation and application methods of carbon fiber mat surface antioxidation coating |
| CN104017397A (en) * | 2014-05-27 | 2014-09-03 | 中国科学院过程工程研究所 | High-temperature protective coating for nickel base alloy steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110451904A (en) * | 2019-07-25 | 2019-11-15 | 太原理工大学 | A kind of silane-modified fire-resistant oxidation resistant coating material and preparation method thereof |
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Application publication date: 20170822 |
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