CN1031724A - Improve the treatment process of corrosion resistance of rolled steel - Google Patents
Improve the treatment process of corrosion resistance of rolled steel Download PDFInfo
- Publication number
- CN1031724A CN1031724A CN88106460A CN88106460A CN1031724A CN 1031724 A CN1031724 A CN 1031724A CN 88106460 A CN88106460 A CN 88106460A CN 88106460 A CN88106460 A CN 88106460A CN 1031724 A CN1031724 A CN 1031724A
- Authority
- CN
- China
- Prior art keywords
- rolling
- rolling stock
- oxide skin
- coating
- protective layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000008569 process Effects 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 title claims description 20
- 239000010959 steel Substances 0.000 title claims description 19
- 238000005260 corrosion Methods 0.000 title description 6
- 230000007797 corrosion Effects 0.000 title description 4
- 238000005096 rolling process Methods 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 11
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 9
- 239000011701 zinc Substances 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 230000003628 erosive effect Effects 0.000 claims abstract description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 238000010791 quenching Methods 0.000 claims description 4
- 229910001563 bainite Inorganic materials 0.000 claims description 3
- 229910000734 martensite Inorganic materials 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 238000005496 tempering Methods 0.000 claims description 2
- 239000011241 protective layer Substances 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000004567 concrete Substances 0.000 description 11
- 239000010410 layer Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000007747 plating Methods 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Inorganic materials [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000011513 prestressed concrete Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003637 basic solution Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- KRTVZTOXNMQDSQ-UHFFFAOYSA-M dipotassium cyanide hydroxide Chemical compound [C-]#N.[K+].[OH-].[K+] KRTVZTOXNMQDSQ-UHFFFAOYSA-M 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/383—Cladded or coated products
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Plasma & Fusion (AREA)
- Manufacturing & Machinery (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating With Molten Metal (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Prevention Of Electric Corrosion (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Electric Cable Arrangement Between Relatively Moving Parts (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Heat Treatment Of Articles (AREA)
- Electroplating Methods And Accessories (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Laminated Bodies (AREA)
- Chemical Treatment Of Metals (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
In order to plate the protective layer of non-ferrous metal such as zinc on the rolling stock surface, to improve the erosion resistance of rolling stock, suggestion will be by the high pressure water scale removal of the rolling stock under the rolling temperature after the operation of rolling, and then preventing to form under the new oxide skin condition, water is cooled to the temperature that is suitable for the hot dip protective layer rapidly, plates protective layer then.The invention has the advantages that scale removal and preventing to produce new oxide skin is that water cools off with same medium all, and cooling can make rolling temperature be used for coating like this, and obtains optimum extent.Each step or the treating processes of the inventive method are all then carried out after the operation of rolling, can carry out under roll speed, make the finished product and the normal the same production line that breaks away from of rolled products without aftertreatment that plated protective layer.
Description
The present invention relates to improve the especially treatment process of erosion resistance such as reinforcing bar, prestressing steel of rolling stock, this method is to be coated with the non-ferrous metal layer on rolling stock, preferably adopt zinc coating, promptly remove the oxide skin of rolling stock under rolling temperature earlier, preventing to form under the condition of new oxide skin, on hot rolling system steel, be coated with the non-ferrous metal layer then.
The rolled iron product can be used as the structure iron in the construction industry, and is described herein main as reinforcing bar, as the prestressing steel of prestressed concrete and minimizing earth anchor and hard formation anchor stress.
When being used for the reinforcing bar of concrete structure, be to be used for Steel Concrete as loose reinforcing bar, be as deformed bar or pull bar when being used for earth anchor or hard formation anchor pole, generally all mutually combine between reinforcing bar and the concrete under this field situation being applied to.Promptly encased the combination immediately of reinforcing bar in Steel Concrete and the prestressed concrete and concrete after in concrete, mixing reinforcing bar by concrete compaction.The combination of prestressed concrete also needs sand-cement slurry is injected the required prestressed pore passage of maintenance prestressed element longitudinal motion.
When mix concrete,, can form the above basic solution of pH12 owing to contain the solution of lime particulate in the cement.The result causes forming at rebar surface the tectum of ferric oxide, makes the rebar surface passivation, prevents surface corrosion.But owing to statics reason and reasons in structure, reinforcing bar is the edge at member mostly, keeps certain minor increment with skin, and promptly so-called concrete is overlapping.Because increasing on atmospheric pollution and the bridge in order to remove the used dissolved salt of ice and snow, be dissolved in chlorine in this medium not exclusively but usually be to be completed into concrete when overlapping, just might the etch reinforcing bar, destroy the passivation layer of reinforcing bar, directly corrosion reinforcing bar.Also there is analogue in the pull bar of earth anchor and hard formation anchor pole, soil through moisture, and moisture and acid soil composition cause infection.Owing to these reasons, used rolled iron product needed in the construction industry is taked anticorrosive measure in addition.
Has been that the public generally understands especially plating with very thin zinc layer on ferrous metal on the metal as rustproof layer, has also grasped various method in this respect.Wherein Aplataer process will need guard section to be immersed in the fusing zinc groove exactly, also can melt with aluminium when needing.People also are used for electro-galvanizing with vitriol-potassium hydroxide plating tank, Sulfatchlorid-potassium hydroxide plating tank or potassium cyanide-potassium hydroxide plating tank.Adopt liquid metal gunite metal cladding also known, be about to wire or powdery metal and be added in the spray gun, by oxygen with the combustion gases mixed melting and by pressurized air atomizing back injection.All these methods all need suitable fund, and especially for adopting a large amount of long products such as the reinforcing bar or the prestressing steel of the manufacturing of operate continuously process, change takes manpower and fund is then bigger.And the product that needs coating will purify earlier before coating, the rolled iron product especially in the operation of rolling the oxide skin of adhesion must remove, this adopt usually sandblast, pickling or similarly treatment process finish.
The public knows that also another kind of method can be used for the rolled parts of continuous rolling, and promptly rolled parts directly removes descaling after rolling, preventing to plate anti-corrosion layer under the condition that forms new oxide skin and utilize rolling heat, as zinc layer (US-PS 2442485).In this case, scale removal on last roll mill stand, this is because rolled parts has tangible reduction of cross sectional area and unit elongation concurrently, thus oxide skin fragmentation that will be very crisp does not have oxide skin basically when making rolled parts disengaging roll mill stand.In order to keep this state, rolled parts after breaking away from roll mill stand with 980 to 760 ℃ temperature, by a sealing be full of the preferably gas compartment of carbon monoxide of depleted gas, CO burning becomes carbonic acid gas in this chamber.Rolled parts is equipped with the powdered zinc chamber through another then, because the temperature of rolled parts melts zinc powder, so be coated with the zinc layer.Because the temperature of rolled parts when breaking away from this chamber through coating is about 700 to 600 ℃, thus must immediately cool off behind the coating, with zinc powder burning the becoming zinc oxide that prevents to have plated.
Aforesaid method also needs suitable fund.The cleaning that keeps the rolled parts surface of scale removal, owing to be subjected to the restriction of depleted gas atmosphere, indoor what seal with suitable way, the supply and the maintenance of not only deoxidation atmosphere are restricted, and rolled parts was kept corresponding temperature and also is restricted before cooling off with other media rapidly behind the coating.
Based on such background, task of the present invention is to utilize rolling heat to carry out coating the operate continuously immediately after rolling of rolled iron product, and makes and adopt the expense of operation required for the present invention and equipment all to remain on the alap level.
The approach that solves task of the present invention is that and then rolling stock is washed away oxide skin with high pressure water after rolling, and for preventing to form new oxide skin, water carries out coating after being cooled fast to the surface of steel below 600 ℃ behind the scale removal.
Advantage of the present invention mainly is scale removal and prevents to form new oxide skin, and the used medium of its cooling all is a water, and best cooling is that rolling temperature is cooled to carry out coating.For this reason, each step of present method or treating processes are all then being carried out after the operation of rolling, that is to say all and can under the roll speed condition, carry out that making, the finished product of coating leave production line with normal rolled products without aftertreatment with identical rolling method.
Is to utilize such fact with the high pressure water impact steel surface with scale removal, in the operation of rolling, stick to the oxide skin on the rolling stock, rolled parts generation deformation in last roll mill stand, for example lax in the transition process of circular section by oval cross-section, after rolled parts breaks away from roll mill stand, be easy to thorough scale removal.The pressure of high pressure water should surpass 200 crust, preferentially adopts 300 to 400 crust, if desired, also can bring up to about 1000 crust.The time of require handling is very short, and promptly the temperature of rolling stock after by nozzle reduces not significantly.
When using the high pressure water scale removal under about 900 to 1000 ℃ rolling temperature,, continue again to use same media processes continue after according to the present invention, the oxide skin temperature is reduced to below 600 ℃ as early as possible with water treatment, promptly the temperature that is reached can not form new oxide skin, but can carry out coating.For this reason, can be according to the present invention with rolling stock by tank or use jet of water.The optimal temperature of plating anti-corrosion layer is determined by circumstances.When for example adopting fine aluminium, temperature is about 560-570 ℃, and when adopting pure zinc, temperature is about 415 ℃, and when adopting alloy, temperature is situated between between the two.Can be easy to various required alloys are used for coating according to the present invention, because will experience each different temperature range to cooling off fully from rolling temperature.
The plating protective layer can adopt any means to carry out.During with non-ferrous metal coating, can spray the powder of fusing, but also can be with rolling stock by the groove of fusion non-ferrous metal is housed.
After water treatment removes descaling, can prevent to form new oxide skin at rolling stock, then cool off fully to rolling stock after plating protective layer, be exactly that this protective layer plays this protective effect.In some cases, on zinc-plated protective layer, also can coat the synthetic resins protective layer again, for example coat the Resins, epoxy that additional protection is used.This step utilizes waste heat to finish in the methods of the invention, has no hell and high water.
Because by the inventive method, rolling stock is through water treatment scale removal postcooling, but this is handled also used water and carries out modified operation.For example one of them method is called " Tempcore " method, this method can be used for welding low-carbon (LC) concrete reinforcement, make rolling stock just form the surface that constitutes by martensite and bainite when promptly carrying out water treatment in " Tempcore " back, when cooling off afterwards, the heat that remains on steel heart portion can not make the tempering of surface portion through the bainite stage, be used as under the high carbon steel situation of prestress steel, the steel that when carrying out water treatment with finishing temperature are 860-1060 ℃ quench, make and be completed into martensitic structure in the upper layer, this is because thermal equilibrium, 2-6 after quenching process begins is in second, and the temperature of upper layer reaches 400-500 ℃.Therefore, carrying out special benefits of refrigerative by the inventive method is exactly the intensity that helps improving steel.
Another advantage of the present invention is also that whole operation stepss all are right after after rolling operation and proceeds, and each the treatment stage equal downstreams of roll mill stand in the end.Be rolling to the last roll mill stand of disengaging because steel billet needs mandatory intermittence, under this condition, if in advance with the steel billet welding, make the rolling continuous rolling that becomes, method then of the present invention has special superiority naturally.Adopt the quick flash welding method of known steel billet to weld between first pass that breaks away from stove or three-high mill frame and finishing mill series, method of the present invention will be succeedd with its special superiority.
Claims (8)
1, improves the especially treatment process of erosion resistance such as reinforcing bar, prestressing steel of rolling stock, this method is the oxide skin of removing under rolling temperature earlier on the rolling stock, preventing to form under the new oxide skin condition, on hot-strip, be coated with the non-ferrous metal layer, best zinc coating, it is characterized in that rolling stock promptly uses high pressure water impact after rolling, remove descaling, rapid water is cooled to the steel surface temperature below 600 ℃ after removing descaling, to prevent to form new oxide skin, carry out coating then.
2, according to the method for claim 1, the pressure that it is characterized in that high pressure water be in 200 Palestine and Israels to 1000 crust, preferentially adopt 300-400 crust.
3,, it is characterized in that rolling stock passes through tank according to the method for claim 1 or 2.
4,, it is characterized in that using the jet of water rolling stock according to the method for claim 1 or 2.
5,, it is characterized in that adopting the non-ferrous metal of pulverized powder shape to carry out coating according to the described method of one of claim 1 to 4.
6,, it is characterized in that rolling stock adopts the groove of the non-ferrous metal that fusing is housed to carry out coating according to the described method of one of claim 1 to 4.
7,, it is characterized in that on above-mentioned coating, also can coating synthetic resin layer, for example Resins, epoxy according to the described method of one of claim 1 to 6.
8, according to the described method of one of claim 1 to 4, the quenching mode is adopted in the cooling that it is characterized in that rolling stock, make to occur the upper layer that is made of martensite and bainite after the quenching immediately, the heat that still remains on the steel center when cooling off afterwards causes the tempering of upper layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3729177A DE3729177C1 (en) | 1987-09-01 | 1987-09-01 | Process for treating rolled steel to increase resistance to corrosion |
| DEP3729177.7 | 1987-09-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1031724A true CN1031724A (en) | 1989-03-15 |
Family
ID=6334972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88106460A Pending CN1031724A (en) | 1987-09-01 | 1988-08-31 | Improve the treatment process of corrosion resistance of rolled steel |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP0305914B1 (en) |
| JP (1) | JPS6475692A (en) |
| CN (1) | CN1031724A (en) |
| AT (1) | ATE70568T1 (en) |
| CA (1) | CA1306391C (en) |
| DD (1) | DD282246A5 (en) |
| DE (2) | DE3729177C1 (en) |
| DK (1) | DK460688A (en) |
| ES (1) | ES2028964T3 (en) |
| GR (1) | GR3004067T3 (en) |
| HU (1) | HU203586B (en) |
| NO (1) | NO176578C (en) |
| PL (1) | PL158408B1 (en) |
| PT (1) | PT88371B (en) |
| SU (1) | SU1674689A3 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912692A (en) * | 2012-10-29 | 2013-02-06 | 厦门新钢金属制品有限公司 | Ballastless track slab insulating bar reinforcement with composite coating |
| WO2014067267A1 (en) * | 2012-10-29 | 2014-05-08 | 厦门新钢金属制品有限公司 | Insulation steel bar with composite coating for gravelless rail board |
| CN104878332A (en) * | 2015-06-03 | 2015-09-02 | 河北钢铁股份有限公司邯郸分公司 | Production method for improving corrosion resistance of heat-based galvanized sheet and strip products |
| CN106001133A (en) * | 2016-07-16 | 2016-10-12 | 太原科技大学 | Conveying rollgangs with cathodic protection for bare pendent electric wires |
| CN106040755A (en) * | 2016-07-16 | 2016-10-26 | 太原科技大学 | Cathode protection conveying roller way provided with electric conduction carrier rollers |
| CN107794476A (en) * | 2017-09-11 | 2018-03-13 | 常熟市双羽铜业有限公司 | A kind of corrosion resisting steel structural member |
| CN109821923A (en) * | 2019-02-26 | 2019-05-31 | 桂林理工大学 | A kind of production method of anti-corrosion coating plain bar |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1005964A6 (en) * | 1992-06-29 | 1994-04-05 | Centre Rech Metallurgique | Protection method of hot rolled steel product. |
| GB2313382A (en) * | 1996-05-23 | 1997-11-26 | Vidal Henri Brevets | Metal coating |
| DE19828827C1 (en) * | 1998-06-27 | 2000-07-20 | Grillo Werke Ag | Thermal sprayed corrosion layer for reinforced concrete and method of manufacturing the same |
| DE102004059008A1 (en) * | 2004-12-08 | 2006-06-14 | Volkswagen Ag | Coating metal components comprises selectively applying a less noble metal than that of the component |
| US20150218815A1 (en) * | 2014-01-31 | 2015-08-06 | Mortar Net Usa, Ltd. | Corrosion resistant structural reinforcement member |
| RU2573304C9 (en) * | 2014-03-11 | 2016-05-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Пензенский государственный университет архитектуры и строительства | Increasing life and hardness of rod- and pipe-type reinforcements |
| DE102016106421A1 (en) | 2016-04-08 | 2017-10-12 | Andrey Senokosov | Cleaning process for riser pipes and equipment therefor |
| CN115261733B (en) * | 2022-08-18 | 2023-06-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Abrasion-resistant corrosion-resistant steel rail for subway and production method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2442485A (en) * | 1944-06-24 | 1948-06-01 | Frederick C Cook | Method of descaling and coating hot-rolled ferrous metal |
| DE1602129B1 (en) * | 1967-06-21 | 1970-08-27 | Roechlingsche Eisen & Stahl | Cooling pipe for cooling rolled material |
| DE2108314A1 (en) * | 1970-08-05 | 1972-02-10 | VEB Schwermaschinenbau-Kombinat Ernst Thallmann Magdeburg, χ 3011 Magdeburg | Rapid cooling rolled rod - of structural steel by a controlled - water quench method |
| DE2353034B2 (en) * | 1972-10-31 | 1980-03-13 | Centre De Recherches Metallurgiques- Centrum Voor Research In De Metallurgie, Bruessel | Process for improving the mechanical strength values of rolled steel products |
| DE3125146A1 (en) * | 1981-06-26 | 1983-01-13 | Woma-Apparatebau Wolfgang Maasberg & Co Gmbh, 4100 Duisburg | Device for descaling hot steel ingots |
-
1987
- 1987-09-01 DE DE3729177A patent/DE3729177C1/en not_active Expired
-
1988
- 1988-08-17 DK DK460688A patent/DK460688A/en not_active Application Discontinuation
- 1988-08-18 HU HU884397A patent/HU203586B/en unknown
- 1988-08-24 NO NO883781A patent/NO176578C/en unknown
- 1988-08-25 PL PL1988274389A patent/PL158408B1/en unknown
- 1988-08-26 SU SU884356320A patent/SU1674689A3/en active
- 1988-08-26 ES ES198888113916T patent/ES2028964T3/en not_active Expired - Lifetime
- 1988-08-26 AT AT88113916T patent/ATE70568T1/en not_active IP Right Cessation
- 1988-08-26 DE DE8888113916T patent/DE3866998D1/en not_active Expired - Fee Related
- 1988-08-26 EP EP88113916A patent/EP0305914B1/en not_active Expired - Lifetime
- 1988-08-29 DD DD88319281A patent/DD282246A5/en not_active IP Right Cessation
- 1988-08-30 PT PT88371A patent/PT88371B/en not_active IP Right Cessation
- 1988-08-31 CA CA000576161A patent/CA1306391C/en not_active Expired - Fee Related
- 1988-08-31 CN CN88106460A patent/CN1031724A/en active Pending
- 1988-08-31 JP JP63215357A patent/JPS6475692A/en active Granted
-
1992
- 1992-03-18 GR GR920400458T patent/GR3004067T3/el unknown
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912692A (en) * | 2012-10-29 | 2013-02-06 | 厦门新钢金属制品有限公司 | Ballastless track slab insulating bar reinforcement with composite coating |
| WO2014067267A1 (en) * | 2012-10-29 | 2014-05-08 | 厦门新钢金属制品有限公司 | Insulation steel bar with composite coating for gravelless rail board |
| CN104878332A (en) * | 2015-06-03 | 2015-09-02 | 河北钢铁股份有限公司邯郸分公司 | Production method for improving corrosion resistance of heat-based galvanized sheet and strip products |
| CN106001133A (en) * | 2016-07-16 | 2016-10-12 | 太原科技大学 | Conveying rollgangs with cathodic protection for bare pendent electric wires |
| CN106040755A (en) * | 2016-07-16 | 2016-10-26 | 太原科技大学 | Cathode protection conveying roller way provided with electric conduction carrier rollers |
| CN106040755B (en) * | 2016-07-16 | 2018-02-27 | 太原科技大学 | Cathodic protection rollgang equipped with conductive carrying roller |
| CN106001133B (en) * | 2016-07-16 | 2018-02-27 | 太原科技大学 | It is formed with the rollgang of sagging exposed electric wire cathodic protection |
| CN107794476A (en) * | 2017-09-11 | 2018-03-13 | 常熟市双羽铜业有限公司 | A kind of corrosion resisting steel structural member |
| CN109821923A (en) * | 2019-02-26 | 2019-05-31 | 桂林理工大学 | A kind of production method of anti-corrosion coating plain bar |
Also Published As
| Publication number | Publication date |
|---|---|
| HU203586B (en) | 1991-08-28 |
| NO883781L (en) | 1989-03-02 |
| JPS6475692A (en) | 1989-03-22 |
| EP0305914A3 (en) | 1989-08-09 |
| DK460688D0 (en) | 1988-08-17 |
| PL158408B1 (en) | 1992-08-31 |
| JPH0445591B2 (en) | 1992-07-27 |
| DK460688A (en) | 1989-03-02 |
| SU1674689A3 (en) | 1991-08-30 |
| GR3004067T3 (en) | 1993-03-31 |
| NO883781D0 (en) | 1988-08-24 |
| PT88371B (en) | 1993-02-26 |
| PT88371A (en) | 1989-07-31 |
| HUT52178A (en) | 1990-06-28 |
| EP0305914B1 (en) | 1991-12-18 |
| CA1306391C (en) | 1992-08-18 |
| DE3729177C1 (en) | 1989-01-05 |
| PL274389A1 (en) | 1989-04-17 |
| ATE70568T1 (en) | 1992-01-15 |
| DD282246A5 (en) | 1990-09-05 |
| ES2028964T3 (en) | 1992-07-16 |
| DE3866998D1 (en) | 1992-01-30 |
| NO176578B (en) | 1995-01-16 |
| EP0305914A2 (en) | 1989-03-08 |
| NO176578C (en) | 1995-04-26 |
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