CN109477192A - The modified method of shape for manufacturing the method for hot rolled coil and for hot rolled coil - Google Patents
The modified method of shape for manufacturing the method for hot rolled coil and for hot rolled coil Download PDFInfo
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- CN109477192A CN109477192A CN201780045377.0A CN201780045377A CN109477192A CN 109477192 A CN109477192 A CN 109477192A CN 201780045377 A CN201780045377 A CN 201780045377A CN 109477192 A CN109477192 A CN 109477192A
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- hot rolled
- rolled coil
- steel billet
- hot
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- 238000000034 method Methods 0.000 title claims abstract description 69
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 67
- 239000010959 steel Substances 0.000 claims abstract description 67
- 239000011572 manganese Substances 0.000 claims abstract description 64
- 239000010936 titanium Substances 0.000 claims abstract description 61
- 239000011651 chromium Substances 0.000 claims abstract description 57
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 36
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 32
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 32
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 31
- 239000010703 silicon Substances 0.000 claims abstract description 31
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 30
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 29
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052796 boron Inorganic materials 0.000 claims abstract description 29
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 29
- 239000011574 phosphorus Substances 0.000 claims abstract description 29
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000005864 Sulphur Substances 0.000 claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 239000012535 impurity Substances 0.000 claims abstract description 26
- 238000005098 hot rolling Methods 0.000 claims abstract description 21
- 238000003303 reheating Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 19
- 230000000694 effects Effects 0.000 description 16
- 239000000463 material Substances 0.000 description 13
- 230000009466 transformation Effects 0.000 description 13
- 229910000859 α-Fe Inorganic materials 0.000 description 6
- 238000005275 alloying Methods 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B2001/225—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 plates, strips, bands or sheets of indefinite length by hot-rolling
Abstract
The present invention relates to the methods of the method for manufacturing hot rolled coil and the shape for correcting hot rolled coil.In a specific embodiment, for manufacturing the method for hot rolled coil the following steps are included: reheating steel billet, the steel billet includes the carbon (C) of 0.18 weight % to 0.56 weight %, the silicon (Si) of 0.1 weight % to 0.5 weight %, the manganese (Mn) of 0.7 weight % to 6.5 weight %, greater than 0 weight % but no more than the phosphorus (P) of 0.02 weight %, greater than 0 weight % but no more than the sulphur (S) of 0.02 weight %, greater than 0 weight % but no more than the chromium (Cr) of 0.3 weight %, greater than 0 weight % but no more than the boron (B) of 0.004 weight %, the titanium (Ti) of 0.01 weight % to 0.04 weight %, and rest part is iron (Fe) and other inevitable impurity；Hot rolling is carried out to steel billet under 850 DEG C to 950 DEG C of finishing mill delivery temperature, to form hot rolled plate；And cooling hot-rolled plate, then batched under 700 DEG C or higher coiling temperature.
Description
Technical field
The present invention relates to the methods of the method for manufacturing hot rolled coil and the shape for correcting hot rolled coil.More specifically,
The present invention relates to for preventing the method for manufacturing hot rolled coil of shape defect, the method can prevent the system in hot rolled coil
The shape defect due to caused by self weight during making, and the present invention relates to the methods of the shape for correcting hot rolled coil.
Background technique
In recent years, it is ensured that an important factor for lightweight is considered as automotive material development.This is intended to be replaced with high-strength material
Existing component is changed, to finally improve fuel efficiency.For this purpose, the material as Structural Materials for Automobile Parts has been developed, thus logical
Addition alloying element is crossed to improve performance, the alloying element includes manganese (Mn), nickel (Ni), chromium (Cr), molybdenum (Mo), titanium (Ti)
Deng, and ensure using cold rolling and heat treatment process the intensity of steel.
Korean Patent Application Publication No.1995-0016913 (be disclosed in July nineteen ninety-five 20, it is entitled ) in disclose background technique related to the present invention.
Summary of the invention
Technical problem
One embodiment of the invention is intended to provide the method for manufacturing hot rolled coil, and the method has and prevents hot rolling
Roll up the excellent effect of deformation.
The method that another embodiment of the invention is intended to provide the shape for correcting hot rolled coil, the method can be with
Prevent the material and deterioration in physical properties of hot rolled coil.
The method that yet another embodiment of the present invention is intended to provide the shape for correcting hot rolled coil, the method can be with
Prevent the surface defect of hot rolled coil from generating when by applying external force to correct shape.
The method that yet another embodiment of the present invention is intended to provide the shape for correcting hot rolled coil, the method have
Excellent business efficiency.
Technical solution
One aspect of the present invention is related to the method for manufacturing hot rolled coil.In one embodiment, for manufacturing heat
Roll the method for volume the following steps are included: reheat steel billet, the steel billet include 0.18 weight % to 0.56 weight % carbon (C),
The silicon (Si) of 0.1 weight % to 0.5 weight %, 0.7 weight % to 6.5 weight % manganese (Mn), be greater than 0 but be not more than 0.02 weight
The phosphorus (P) of % is measured, the sulphur (S) greater than 0 weight % but no more than 0.02 weight %, is greater than 0 weight % but is not more than 0.3 weight %
Chromium (Cr), greater than 0 weight % but no more than the boron (B) of 0.004 weight %, the titanium of 0.01 weight % to 0.04 weight %
(Ti) and rest part is iron (Fe) and other inevitable impurity；In 850 DEG C to 950 DEG C of finishing mill delivery temperature
Under to steel billet carry out hot rolling, to form hot rolled plate；And cooling hot-rolled plate, then under 700 DEG C or higher coiling temperature
It is batched.
In one embodiment, steel billet may include the carbon (C) of 0.21 weight % to 0.37 weight %, 0.1 weight %
To the silicon (Si) of 0.4 weight %, 1.1 weight % to 1.5 weight % manganese (Mn), be greater than 0 weight % but be not more than 0.02 weight
Measure the phosphorus (P) of %, greater than 0 weight % but no more than the sulphur (S) of 0.02 weight %, the chromium of 0.1 weight % to 0.3 weight %
(Cr), the boron (B) of 0.001 weight % to 0.004 weight %, 0.01 weight % to the titanium (Ti) of 0.04 weight % and remaining
Part is iron (Fe) and other inevitable impurity.
In one embodiment, steel billet may include the carbon (C) of 0.18 weight % to 0.25 weight %, 0.3 weight %
To the silicon (Si) of 0.5 weight %, 2 weight % to 6.5 weight % manganese (Mn), be greater than 0 weight % but be not more than 0.02 weight %
Phosphorus (P), greater than 0 weight % but no more than 0.01 weight % sulphur (S), greater than 0 weight % but be not more than 0.1 weight % chromium
(Cr), the titanium (Ti) of the boron (B), 0.01 weight % to 0.04 weight % greater than 0 weight % but no more than 0.001 weight %, with
And its remaining part is divided into iron (Fe) and other inevitable impurity.
In one embodiment, steel billet may include the carbon (C) of 0.5 weight % to 0.56 weight %, 0.1 weight % extremely
The silicon (Si) of 0.3 weight %, the manganese (Mn) of 0.7 weight % to 1 weight %, greater than 0 weight % but no more than 0.02 weight %'s
Phosphorus (P), greater than 0 weight % but no more than the sulphur (S) of 0.01 weight %, 0.1 weight % to 0.3 weight % chromium (Cr), be greater than 0
The titanium (Ti) and rest part of weight % but boron (B), 0.01 weight % to 0.02 weight % no more than 0.001 weight %
For iron (Fe) and other inevitable impurity.
Another aspect of the present invention is related to the method for the shape for correcting hot rolled coil.In one embodiment, it uses
In amendment hot rolled coil shape method the following steps are included: hot rolled coil is mounted on the hook to form C-shaped hook lower part；It uses
The longest diameter of the external diameter measuring device measurement hot rolled coil on C-shaped hook top is set；It will by the driven roller being arranged on hook
The longest diameter of hot rolled coil is adjusted to perpendicular to C-shaped hook；The C-shaped hook for being equipped with hot rolled coil is placed on bracket, is then lifted out, from
And the shape of hot rolled coil is corrected by being self-possessed.
Yet other aspects of the invention are related to the method for the shape for correcting hot rolled coil.In one embodiment,
For correcting the method for the shape of hot rolled coil the following steps are included: hot rolled coil to be mounted on to the hook to form C-shaped hook lower part；Make
The longest diameter of hot rolled coil is measured with the external diameter measuring device that C-shaped hook top is arranged in；Pass through the drive being arranged on lower hook
The longest diameter of hot rolled coil is adjusted to perpendicular to C-shaped hook by dynamic roller；The C-shaped hook for being equipped with hot rolled coil is placed on bracket, then
It is promoted, to correct the shape of hot rolled coil by being self-possessed, wherein hot rolled coil is manufactured by method comprising the following steps；
Steel billet is reheated, the steel billet includes the silicon of the carbon (C) of 0.18 weight % to 0.56 weight %, 0.1 weight % to 0.5 weight %
(Si), the manganese (Mn) of 0.7 weight % to 6.5 weight %, greater than 0 weight % but no more than 0.02 weight % phosphorus (P), be greater than 0
Weight % but no more than 0.02 weight % sulphur (S), greater than 0 weight % but no more than 0.3 weight % chromium (Cr), be greater than 0 weight
Amount % but titanium (Ti) and rest part no more than the boron (B) of 0.004 weight %, 0.01 weight % to 0.04 weight % is
Iron (Fe) and other inevitable impurity；Hot rolling is carried out to steel billet under 850 DEG C to 950 DEG C of finishing mill delivery temperature, from
And form hot rolled plate；And cooling hot-rolled plate, then batched under 700 DEG C or higher coiling temperature.
In one embodiment, hot rolled coil may include carbon (C), 0.1 weight of 0.21 weight % to 0.37 weight %
The silicon (Si) of % to 0.4 weight %, the manganese (Mn) of 1.1 weight % to 1.5 weight % are measured, is greater than 0 weight % but is not more than 0.02
The phosphorus (P) of weight %, greater than 0 weight % but no more than the sulphur (S) of 0.02 weight %, the chromium of 0.1 weight % to 0.3 weight %
(Cr), the boron (B) of 0.001 weight % to 0.004 weight %, 0.01 weight % to the titanium (Ti) of 0.04 weight % and remaining
Part is iron (Fe) and other inevitable impurity.
In one embodiment, hot rolled plate can be cooled down and then be rolled up under 700 DEG C to 900 DEG C of coiling temperature
It takes.
Advantageous effects
It, can when carrying out shape amendment to the hot rolled coil by the method manufacture according to the present invention for manufacturing hot rolled coil
With the phase transformation of steel during delayed heat roller repairing, to prevent the material and deterioration in physical properties of hot rolled coil, show simultaneously
The excellent effect for preventing hot rolled coil from deforming.External force is being used in addition, allowing to prevent that using the amendment by being self-possessed with gravity
The surface defect (such as scratch) of the hot rolled coil generated when amendment.In addition, it can reduce amendment cost and provide excellent warp
Ji efficiency.
Detailed description of the invention
Fig. 1 shows the method for manufacturing hot rolled coil of an embodiment according to the present invention.
Fig. 2 shows the methods of the shape for correcting hot rolled coil of an embodiment according to the present invention.
The method that Fig. 3 schematically shows the shape for correcting hot rolled coil of an embodiment according to the present invention.
Fig. 4 (a) is to show that the photo of hot rolled coil according to an embodiment of the invention after batching at once, Fig. 4 (b) are
Show hot rolled coil in air photo after cooling.
Fig. 5 (a) is photo of the hot rolled coil after batching at once shown according to another embodiment of the invention, Fig. 5 (b)
It is display hot rolled coil in air photo after cooling.
Fig. 6 (a) is the photo for showing the hot rolled coil of comparative example of the invention after batching at once, and Fig. 6 (b) is display
Hot rolled coil is in air photo after cooling.
Fig. 7 be compare hot rolled coil in the embodiment of the present invention and comparative example of the present invention with hot rolled coil manufacturing time with
The curve graph of the transformation curve of shape correction time passage.
Specific embodiment
Hereinafter, it will be described in detail the present invention.In the following description of the present invention, this when may not be necessary is obscured
When the theme of invention, the detailed description of related known techniques or configuration will be omitted.
In addition, term used in being described below allows for their effects in the present invention and defines, and can
To be changed according to the intention of user or operator or common practice.Therefore, it should based on description specification of the invention
Content is defined.
Method for manufacturing hot rolled coil
One aspect of the present invention is related to the method for manufacturing hot rolled coil.Fig. 1 shows an implementation according to the present invention
The method for manufacturing hot rolled coil of scheme.In one embodiment, for manufacturing the method for hot rolled coil the following steps are included:
(S10) steel billet is reheated；(S20) hot rolling；(S30) is batched.More specifically, the method for manufacturing hot rolled coil includes following step
Rapid: (S10) reheats steel billet, and the steel billet includes the carbon (C) of 0.18 weight % to 0.56 weight %, 0.1 weight % to 0.5 weight
Measure the silicon (Si) of %, the manganese (Mn) of 0.7 weight % to 6.5 weight %, greater than 0 weight % but no more than the phosphorus of 0.02 weight %
(P), greater than 0 weight % but no more than 0.02 weight % sulphur (S), greater than 0 weight % but be not more than 0.3 weight % chromium
(Cr), the titanium (Ti) of the boron (B), 0.01 weight % to 0.04 weight % greater than 0 weight % but no more than 0.004 weight %, with
And its remaining part is divided into iron (Fe) and other inevitable impurity；(S20) under 850 DEG C to 950 DEG C of finishing mill delivery temperature
Hot rolling is carried out to steel billet, to form hot rolled plate；And (S30) cooling hot-rolled plate, then in 700 DEG C or higher coiling temperature
Under batched.
Hereinafter, it will be described according to the present invention for manufacturing each step of the method for hot rolled coil.
(S10) steel billet reheats step
The step be reheat steel billet the step of, the steel billet include 0.18 weight % to 0.56 weight % carbon (C),
The silicon (Si) of 0.1 weight % to 0.5 weight %, the manganese (Mn) of 0.7 weight % to 6.5 weight % greater than 0 weight % but are not more than
The phosphorus (P) of 0.02 weight %, is greater than 0 weight % but is not more than 0.3 the sulphur (S) greater than 0 weight % but no more than 0.02 weight %
The chromium (Cr) of weight %, the boron (B) greater than 0 weight % but no more than 0.004 weight %, 0.01 weight % are to 0.04 weight %'s
Titanium (Ti) and rest part are iron (Fe) and other inevitable impurity.
Hereinafter, it will be described in the component for including in steel billet.
Carbon (C)
Carbon (C) is added to ensure intensity.With the total weight of steel billet, the content of carbon is 0.18 weight % to 0.56 weight
Measure %.If the content of carbon less than 0.18 weight %, is likely difficult to ensure enough intensity.On the other hand, if carbon contains
Amount is greater than 0.56 weight %, then may be decreased toughness.
Silicon (Si)
Silicon (Si) is used as except the deoxidier of deoxidation from steel, and adds and be used for solution strengthening.In one embodiment, with
The total weight of steel billet, the content of silicon are 0.1 weight % to 0.5 weight %.If the content of silicon adds less than 0.1 weight %
Add the effect of silicon insufficient, and if the content of silicon is greater than 0.5 weight %, it is reheating and may reduced in course of hot rolling
Solderability simultaneously generates red rust, therefore has an adverse effect to surface quality.In addition, it may generate the coating performance after welding
Adverse effect.
Manganese (Mn)
Manganese (Mn) is solution strengthening element, and the harden ability by increasing steel effectively ensures that intensity.In addition, manganese is difficult to understand
Family name's body stabilizing element facilitates fetrite grain refinement by delay ferrite and pearlite transformation.
In one embodiment, with the total weight of steel billet, the content of manganese is 0.7 weight % to 6.5 weight %.If
The content of manganese is less than 0.7 weight %, then solid solution strengthening effect may be insufficient.On the other hand, if the content of manganese is greater than 6.5 weights
% is measured, then may greatly reduce solderability.Additionally, it is possible to generate the problem that, the formation and center due to MnS field trash are inclined
The ductility of the generation of analysis, steel plate greatly reduces.
Phosphorus (P)
Phosphorus (P) is added to inhibit the formation of cementite and increase intensity.However, phosphorus makes deteriorated weldability, and pass through plate
Base center segregation and the difference for leading to final performance.Therefore, in the present invention, with the total weight of steel billet, the content of phosphorus (P) is limited
System is being greater than 0 weight % but is being not more than 0.02 weight %.
Sulphur (S)
Sulphur (S) is the toughness and solderability and the element that non-metallic inclusion (MnS) is formed in conjunction with manganese for reducing steel,
Cause crackle in the process of steel.Therefore, with the total weight of steel billet, the content of sulphur (S) is limited in greater than 0 weight % but not
Greater than 0.02 weight %.
Chromium (Cr)
Addition chromium is the harden ability and intensity in order to increase steel.In one embodiment, with the total weight of steel billet, chromium
Content be greater than 0 weight % but be not more than 0.3 weight %.If the content of chromium is greater than 0.3 weight %, hot rolled coil may be decreased
Toughness.
Boron (B)
Addition boron (B) is to compensate harden ability by replacing expensive hardening element molybdenum, and have to pass through and increase Austria
Family name's body grain growth temperature refines the effect of crystal grain.
In one embodiment, with the total weight of steel billet, the content of boron is greater than 0 weight % but is not more than 0.004 weight
Measure %.If the content of boron is greater than 0.004 weight %, the risk for reducing elongation can be can increase.
Titanium (Ti)
Addition titanium (Ti) is to improve harden ability and improve performance by forming precipitating.In addition, by high temperature
It is formed precipitated phase such as Ti (C, N), is effectively facilitated Austenite Grain Refinement.
In one embodiment, with the total weight of steel billet, the content of titanium is 0.01 weight % to 0.04 weight %.Such as
For the content of fruit titanium less than 0.01 weight %, then the effect for adding titanium may be insufficient, and if the content of titanium is greater than 0.04 weight
% is measured, then there may be continuously casting defects, it may be difficult to ensure the physical property of hot rolled coil, and can on hot rolled coil surface
It can crack.
Rest part in addition to the aforementioned components is substantially made of iron (Fe).As used herein, " rest part is stated
Substantially it is made of iron (Fe) " mean that the substance containing other trace elements, including inevitable impurity may include at this
In invention, as long as it does not damage effect of the invention.
In one embodiment, steel billet can be applied to middle carbon hot rolled coil.For example, steel billet may include 0.21 weight %
To the carbon (C) of 0.37 weight %, the silicon (Si) of 0.1 weight % to 0.4 weight %, 1.1 weight % to 1.5 weight % manganese
(Mn), greater than 0 weight % but no more than 0.02 weight % phosphorus (P), greater than 0 weight % but be not more than 0.02 weight % sulphur
(S), the chromium (Cr) of 0.1 weight % to 0.3 weight %, the boron (B) of 0.001 weight % to 0.004 weight %, 0.01 weight % be extremely
The titanium (Ti) and rest part of 0.04 weight % is iron (Fe) and other inevitable impurity.
In another embodiment, steel billet can be applied to high manganese hot rolled coil.For example, steel billet may include 0.18 weight
Measure the manganese of the carbon (C) of % to 0.25 weight %, the silicon (Si) of 0.3 weight % to 0.5 weight %, 2 weight % to 6.5 weight %
(Mn), greater than 0 weight % but no more than 0.02 weight % phosphorus (P), greater than 0 weight % but be not more than 0.01 weight % sulphur
(S), greater than 0 weight % but no more than 0.1 weight % chromium (Cr), greater than 0 weight % but be not more than 0.001 weight % boron
(B), the titanium (Ti) and rest part of 0.01 weight % to 0.04 weight % is iron (Fe) and other inevitable impurity.
In yet another embodiment, steel billet can be applied to high-carbon hot rolled coil.For example, steel billet may include 0.5 weight
Measure the manganese of the carbon (C) of % to 0.56 weight %, the silicon (Si) of 0.1 weight % to 0.3 weight %, 0.7 weight % to 1 weight %
(Mn), greater than 0 weight % but no more than 0.02 weight % phosphorus (P), greater than 0 weight % but be not more than 0.01 weight % sulphur
(S), the chromium (Cr) of 0.1 weight % to 0.3 weight %, greater than 0 weight % but be not more than 0.001 weight % boron (B), 0.01 weight
The titanium (Ti) and rest part for measuring % to 0.02 weight % are iron (Fe) and other inevitable impurity.
In one embodiment, steel billet can add under 1,150 DEG C to 1,250 DEG C of slab reheating temperature (SRT)
Heat.Under the slab reheating temperature, the effect for homogenizing alloying element is excellent.
(S20) hot-rolled step
The step is the hot rolling steel billet under 850 DEG C to 950 DEG C of finishing mill delivery temperature, to form the step of hot rolled plate
Suddenly.When carrying out hot rolling under the finishing mill delivery temperature, hot rolled coil can have excellent rigidity and excellent mouldability, and
And it is excellent in terms of batching machinability, and the effect for preventing hot rolled coil from deforming can be excellent.
(S30) step is batched
The step of step is cooling hot-rolled plate, is then batched under 700 DEG C or higher coiling temperature.At one
In embodiment, hot rolled plate can be cooled to coiling temperature and then batched at such a temperature.In one embodiment,
Cooling can be carried out by the way that air is cooling without the use of cooling water.It, can be effectively when being cooled down under the above conditions
It reduces and occurs protrusion defect on hot rolled coil.As used herein, " protrusion defect " can refer to the shape distortion defect of hot rolled coil.Tool
Body, " protrusion defect " can refer in the shape defect generated on hot rolled coil, due to deformation of the hot rolled coil on gravity direction,
Become shape distortion defect caused by oval rather than circle by the internal diameter and outer diameter of hot rolled coil.
After carrying out hot rolling to the sheet material for including alloy compositions of the invention, cooling control can be carried out, so that waiting
In or higher than completing to batch at a temperature of starting temperature of transformation.When being batched under above-mentioned coiling temperature, after batching
Start ferrite transformation after certain time, therefore, because the Slow cooling (air is cooling) rolled up after batching, is completed needed for phase transformation
Time may increase sharply, to advantageously prevent shape distortion.To the greatest extent may be used that is, one embodiment of the invention can provide
Energy ground postpones the treatment conditions at the time point that the phase transformation after batching occurs.
If hot rolled plate is batched under the coiling temperature lower than 700 DEG C, the phase transformation of hot rolled plate can be cooled
It is carried out in journey, and the phase transformation after forming hot rolled coil outside possible amount incurred, causes scroll product to increase, then hot rolled coil may
It is shunk as temperature reduces, and its shape is deformed into ellipse due to self weight, so as to cause protrusion defect.In a reality
It applies in scheme, hot rolled plate can be cooled down and then be batched under 700 DEG C to 900 DEG C of coiling temperature.It can be for example, batching
It is carried out under 730 DEG C to 820 DEG C of coiling temperature.Hot rolled coil obtained may include ferrite and bainitic microstructure.
Method for correcting the shape of hot rolled coil
Another aspect of the present invention is related to the method for the shape for correcting hot rolled coil.Fig. 2 shows according to the present invention
The method of the shape for correcting hot rolled coil of one embodiment.With reference to Fig. 2, the method packet of the shape for correcting hot rolled coil
Include following steps: (S101) installs hot rolled coil；(S102) longest diameter of hot rolled coil is measured；(S103) position of hot rolled coil is adjusted
It sets；(S104) is promoted.
The method that Fig. 3 schematically shows the shape for correcting hot rolled coil according to another embodiment of the invention.Ginseng
Fig. 3 is examined, for correcting the method for the shape of hot rolled coil the following steps are included: hot rolled coil is mounted on by (S101) to be formed under C-shaped hook
On the hook in portion；(S102) using the longest diameter for the external diameter measuring device measurement hot rolled coil that C-shaped hook top is arranged in；(S103)
The longest diameter of hot rolled coil is adjusted to perpendicular to C-shaped hook by the driven roller being arranged on lower hook；It (S104) will installation
There is the C-shaped hook of hot rolled coil to be placed on bracket, be then lifted out, to correct the shape of hot rolled coil by being self-possessed.
For example, hot rolled coil 100 is mounted on the hook 201 to form 200 lower part of C-shaped hook as shown in Fig. 3 (a).Such as Fig. 3
(b) shown in, the longest diameter of hot rolled coil 100 is measured using the external diameter measuring device 210 that C-shaped hook top 202 is arranged in.It connects down
Come, as shown in Fig. 3 (c), using the driven roller 220 being arranged on the hook 201 for forming lower part, adjusts the longest of hot rolled coil 100
Diameter is perpendicular to C-shaped hook.As shown in Fig. 3 (e), the C-shaped hook 200 for being equipped with hot rolled coil is placed on bracket 300 and is then lifted out,
Thus as shown in Fig. 3 (f), the hot rolled coil shape for being deformed into ellipse can be modified to circle by self weight.
Hot rolled coil is manufactured by method comprising the following steps: reheating steel billet, the steel billet includes 0.18 weight
Measure the manganese of the carbon (C) of % to 0.56 weight %, the silicon (Si) of 0.1 weight % to 0.5 weight %, 0.7 weight % to 6.5 weight %
(Mn), greater than 0 weight % but no more than 0.02 weight % phosphorus (P), greater than 0 weight % but be not more than 0.02 weight % sulphur
(S), greater than 0 weight % but no more than 0.3 weight % chromium (Cr), greater than 0 weight % but be not more than 0.004 weight % boron
(B), 0.01 weight % to the titanium (Ti) of 0.04 weight % and remaining be iron (Fe) and other inevitable impurity；850
DEG C hot rolling is carried out to steel billet under 950 DEG C of finishing mill delivery temperature, to form hot rolled plate；And cooling hot-rolled plate, then
It is batched under 700 DEG C or higher coiling temperature.In one embodiment, can then be existed by cooling hot-rolled plate
It is batched under 700 DEG C to 900 DEG C of coiling temperature to manufacture hot rolled coil.Hot rolled coil obtained may include ferrite and bayesian
Body microstructure.
Method for manufacturing hot rolled coil can be used with it is above-mentioned for manufacture it is identical used in the method for hot rolled coil
Steel billet carries out, therefore omits the detailed description.
In one embodiment, hot rolled coil can be middle carbon hot-finished material.It may include 0.21 weight % to 0.37
The carbon (C) of weight %, the silicon (Si) of 0.1 weight % to 0.4 weight %, 1.1 weight % to 1.5 weight % manganese (Mn), be greater than 0
Weight % but no more than 0.02 weight % phosphorus (P), greater than 0 weight % but be not more than 0.02 weight % sulphur (S), 0.1 weight
Measure the chromium (Cr) of % to 0.3 weight %, the boron (B) of 0.001 weight % to 0.004 weight %, 0.01 weight % to 0.04 weight
The titanium (Ti) and rest part for measuring % are iron (Fe) and other inevitable impurity.
In another embodiment, hot rolled coil can be high manganese hot-finished material.Its may include 0.18 weight % extremely
The carbon (C) of 0.25 weight %, the silicon (Si) of 0.3 weight % to 0.5 weight %, 2 weight % to 6.5 weight % manganese (Mn), big
In 0 weight % but it is not more than the phosphorus (P) of 0.02 weight %, the sulphur (S) greater than 0 weight % but no more than 0.01 weight %, is greater than 0
Weight % but no more than 0.1 weight % chromium (Cr), greater than 0 weight % but be not more than 0.001 weight % boron (B), 0.01 weight
The titanium (Ti) and rest part for measuring % to 0.04 weight % are iron (Fe) and other inevitable impurity.
In yet another embodiment, hot rolled coil can be high-carbon hot-finished material.It may include 0.5 weight % to 0.56
The carbon (C) of weight %, the silicon (Si) of 0.1 weight % to 0.3 weight %, 0.7 weight % to 1 weight % manganese (Mn), be greater than 0 weight
It measures % but is not more than the phosphorus (P) of 0.02 weight %, greater than 0 weight % but no more than sulphur (S), the 0.1 weight % of 0.01 weight %
To the chromium (Cr) of 0.3 weight %, greater than 0 weight % but no more than boron (B), the 0.01 weight % to 0.02 weight of 0.001 weight %
The titanium (Ti) and rest part for measuring % are iron (Fe) and other inevitable impurity.
It, can when carrying out shape amendment to the hot rolled coil by the method manufacture according to the present invention for manufacturing hot rolled coil
To prevent the phase transformation of steel in cooling procedure after hot rolling from showing simultaneously to prevent the material and deterioration in physical properties of hot rolled coil
The excellent effect for preventing hot rolled coil from deforming.External force is being used in addition, allowing to prevent that using the amendment by being self-possessed with gravity
The surface defect (such as scratch) of the hot rolled coil generated when amendment.In addition, it can exclude the existing correcting device using external force,
To reduce amendment cost and provide excellent business efficiency.
Hereinafter, by reference preferred embodiment the composition and effect that the present invention will be described in more detail.However, these are implemented
Example is merely to illustrate the present invention, should not be construed in any way as limiting the scope of the present invention.
Embodiment and comparative example
Embodiment 1
As middle carbon material, steel billet is reheated at 1200 DEG C, the steel billet includes carbon (C), 0.2 weight of 0.23 weight %
Measure the silicon (Si) of %, the manganese (Mn) of 1.2 weight %, the phosphorus (P) of 0.015 weight %, the sulphur (S) of 0.01 weight %, 0.2 weight %
Chromium (Cr), the boron (B) of 0.003 weight %, the titanium (Ti) of 0.02 weight % and rest part be iron (Fe) and it is other can not
The impurity avoided carries out hot rolling to steel billet under 880 DEG C of finishing mill delivery temperature, to form hot rolled plate.Then, by hot rolling
Plate is cooling and is batched under 700 DEG C of coiling temperature, to manufacture hot rolled coil.
Embodiment 2
As high manganese material, steel billet is reheated at 1200 DEG C, the steel billet includes carbon (C), 0.4 weight of 0.2 weight %
Measure the silicon (Si) of %, the manganese (Mn) of 6 weight %, the phosphorus (P) of 0.015 weight %, the sulphur (S) of 0.01 weight %, 0.05 weight %
Chromium (Cr), the boron (B) of 0.001 weight %, the titanium (Ti) of 0.02 weight % and rest part be iron (Fe) and it is other can not
The impurity avoided carries out hot rolling to steel billet under 940 DEG C of finishing mill delivery temperature, to form hot rolled plate.Then, by hot rolling
Plate is cooling and is batched under 700 DEG C of coiling temperature, to manufacture hot rolled coil.
Embodiment 3
As high-carbon material, steel billet is reheated at 1200 DEG C, the steel billet includes carbon (C), 0.2 weight of 0.55 weight %
Measure the silicon (Si) of %, the manganese (Mn) of 0.8 weight %, the phosphorus (P) of 0.015 weight %, the sulphur (S) of 0.01 weight %, 0.2 weight %
Chromium (Cr), the boron (B) of 0.001 weight %, the titanium (Ti) of 0.01 weight % and rest part be iron (Fe) and it is other can not
The impurity avoided carries out hot rolling to steel billet under 890 DEG C of finishing mill delivery temperature, to form hot rolled plate.Then, by hot rolling
Plate is cooling and is batched under 730 DEG C of coiling temperature, to manufacture hot rolled coil.
Comparative example 1
In a manner of identical with described in embodiment 1 hot rolled coil is manufactured, the difference is that hot rolled plate is batched at 560 DEG C
At a temperature of batched.
Comparative example 2
In a manner of identical with described in embodiment 1 hot rolled coil is manufactured, the difference is that hot rolled plate is batched at 600 DEG C
At a temperature of batched.
Comparative example 3
In a manner of identical with described in embodiment 1 hot rolled coil is manufactured, the difference is that hot rolled plate is batched at 620 DEG C
At a temperature of batched.
Comparative example 4
In a manner of identical with described in embodiment 1 hot rolled coil is manufactured, the difference is that hot rolled plate is batched at 650 DEG C
At a temperature of batched.
Fig. 4 (a) is the photo for showing according to embodiments of the present invention 1 hot rolled coil after batching at once, and Fig. 4 (b) is display
Hot rolled coil is in air photo after cooling.Fig. 5 (a) is to show according to embodiments of the present invention 1 hot rolled coil after batching at once
Photo, Fig. 5 (b) are display hot rolled coils in air photo after cooling.Fig. 6 (a) is the hot rolling for showing comparative example of the present invention
The photo after batching at once is rolled up, Fig. 6 (b) is display hot rolled coil in air photo after cooling.With reference to Fig. 4 (a) and Fig. 4 (b),
In embodiment 1, protrusion defect is not observed at once after the batching of hot rolled coil, but observes protrusion after air is cooling
Defect.However, it can be seen that the degree of protrusion defect is less than the degree of the protrusion defect in comparative example.With reference to Fig. 5 (a) and
Fig. 5 (b), in example 2, after the batching of hot rolled coil at once with air it is cooling after without it may be immediately observed that protrusion defect.Ginseng
Fig. 6 (a) and Fig. 6 (b) are examined, in comparative example, observes protrusion defect at once after the batching of hot rolled coil, it can be seen that with
Air cooled progress, the degree for protruding defect become more serious.
The calibration of the shape of hot rolled coil
For embodiment 1 to embodiment 3 and comparative example 1 to the hot rolled coil of comparative example 4, shape amendment is carried out.
Each hot rolled coil is mounted on the hook to form C-shaped hook lower part, then using the external diameter measuring device that C-shaped hook top is arranged in
Measure the longest diameter of hot rolled coil.Hereafter, using the driven roller being arranged on hook, the longest diameter of hot rolled coil is adjusted to vertical
Directly in C-shaped hook.The C-shaped hook for being equipped with hot rolled coil is placed on bracket and is then lifted out, to pass through self weight amendment hot rolled coil
Shape.
For embodiment 1 to embodiment 3 and comparative example 1 to comparative example 4, observes the internal diameter of volume and repaired in shape
Protrusion defect whether is had modified after just, and is observed result and be shown in the following table 1.
Table 1
With reference to table 1 above, it can be seen that convex without occurring after amendment in the case where embodiment 1 to embodiment 3
Defect out, and in the case where comparative example 1 to comparative example 4, coiling temperature of the invention is had exceeded, even if repairing
After just, protrusion defect is not corrected suitably yet.
When Fig. 7 is that the hot rolled coil in comparing embodiment 1 and comparative example 1 is corrected with hot rolled coil manufacturing time and shape
Between the figure of transformation curve that elapses.With reference to Fig. 7, in the case where the embodiment of the present invention 1, wherein applying specific alloying element
System and be equal to or higher than phase transition temperature temperature (700 DEG C) under batched, it is therefore, certain after manufacturing hot rolled coil
After time, Xiang Bianwei ferrite, it can be seen that due to the Slow cooling (air is cooling) rolled up after batching, complete needed for phase transformation
Time increases sharply, this shows that embodiment 1 is conducive to shape amendment.However, lower than hot rolled plate phase transition temperature at a temperature of
In the case where the comparative example 1 batched, it can be seen that compared with Example 1, Xiang Bianwei ferrite occurs earlier,
Make it difficult to ensure that the time that phase transformation of the invention starts, this shows that comparative example 1 is unfavorable for shape amendment.
In addition, the method according to the present invention for manufacturing the method and the shape for correcting hot rolled coil of hot rolled coil, it can
To reduce the generation of the protrusion of hot rolled coil, to reduce by (these such as the breakage of inner wrap portion, delay operating time, equipment breakages
Can occur in subsequent makeover process due to the volume of protrusion a bit) caused by additional operations, to provide following effect: including
Working efficiency is improved, material quality is improved, reduces the generation rate etc. of the faulty goods as waste disposal.
Those skilled in the art easily can carry out simple modifications or changes to the present invention, and can consider these
Modifications or changes is included within the scope of the invention.
Claims (9)
1. a kind of method for manufacturing hot rolled coil, the described method comprises the following steps:
Steel billet is reheated, the steel billet includes the carbon (C) of 0.18 weight % to 0.56 weight %, 0.1 weight % to 0.5 weight %
Silicon (Si), 0.7 weight % to 6.5 weight % manganese (Mn), greater than 0 weight % but no more than the phosphorus (P) of 0.02 weight %, big
In 0 weight % but it is not more than the sulphur (S) of 0.02 weight %, the chromium (Cr) greater than 0 weight % but no more than 0.3 weight %, is greater than 0
The titanium (Ti) and rest part of weight % but boron (B), 0.01 weight % to 0.04 weight % no more than 0.004 weight %
For iron (Fe) and other inevitable impurity；
Hot rolling is carried out to reheated steel billet under 850 DEG C to 950 DEG C of finishing mill delivery temperature, to form hot rolled plate；
And
Then cooling hot-rolled plate is batched under 700 DEG C or higher coiling temperature.
2. according to the method described in claim 1, wherein, the steel billet include 0.21 weight % to 0.37 weight % carbon (C),
The silicon (Si) of 0.1 weight % to 0.4 weight %, the manganese (Mn) of 1.1 weight % to 1.5 weight % greater than 0 weight % but are not more than
The phosphorus (P) of 0.02 weight %, the sulphur (S) greater than 0 weight % but no more than 0.02 weight %, 0.1 weight % are to 0.3 weight %'s
Chromium (Cr), the boron (B) of 0.001 weight % to 0.004 weight %, 0.01 weight % to 0.04 weight % titanium (Ti), Yi Jiqi
Remaining part is divided into iron (Fe) and other inevitable impurity.
3. according to the method described in claim 1, wherein, the steel billet include 0.18 weight % to 0.25 weight % carbon (C),
The silicon (Si) of 0.3 weight % to 0.5 weight %, the manganese (Mn) of 2 weight % to 6.5 weight % greater than 0 weight % but are not more than
The phosphorus (P) of 0.02 weight %, is greater than 0 weight % but is not more than 0.1 the sulphur (S) greater than 0 weight % but no more than 0.01 weight %
The chromium (Cr) of weight %, the boron (B) greater than 0 weight % but no more than 0.001 weight %, 0.01 weight % are to 0.04 weight %'s
Titanium (Ti) and rest part are iron (Fe) and other inevitable impurity.
4. according to the method described in claim 1, wherein, the steel billet include 0.5 weight % to 0.56 weight % carbon (C),
The silicon (Si) of 0.1 weight % to 0.3 weight %, the manganese (Mn) of 0.7 weight % to 1 weight % greater than 0 weight % but are not more than
The phosphorus (P) of 0.02 weight %, the sulphur (S) greater than 0 weight % but no more than 0.01 weight %, 0.1 weight % are to 0.3 weight %'s
Chromium (Cr), greater than 0 weight % but no more than the boron (B) of 0.001 weight %, the titanium (Ti) of 0.01 weight % to 0.02 weight %,
And rest part is iron (Fe) and other inevitable impurity.
5. according to the method described in claim 1, wherein, then hot rolled plate is cooled down under 700 DEG C to 900 DEG C of coiling temperature
It is batched.
6. a kind of method for correcting the shape of hot rolled coil, the described method comprises the following steps:
Hot rolled coil is mounted on the hook to form C-shaped hook lower part；
The longest diameter of hot rolled coil is measured using the external diameter measuring device that C-shaped hook top is arranged in；
The longest diameter of hot rolled coil is adjusted to perpendicular to C-shaped hook by the driven roller being arranged on hook；And
The C-shaped hook for being equipped with hot rolled coil is placed on bracket, is then lifted out, to pass through the shape of self weight amendment hot rolled coil.
7. a kind of method for correcting the shape of hot rolled coil, the described method comprises the following steps:
Hot rolled coil is mounted on the hook to form C-shaped hook lower part；
The longest diameter of hot rolled coil is measured using the external diameter measuring device that C-shaped hook top is arranged in；
The longest diameter of hot rolled coil is adjusted to perpendicular to C-shaped hook by the driven roller being arranged on hook；And
The C-shaped hook for being equipped with hot rolled coil is placed on bracket, is then lifted out, thus by the shape of self weight amendment hot rolled coil,
Wherein, hot rolled coil is manufactured by method comprising the following steps:
Steel billet is reheated, the steel billet includes the carbon (C) of 0.18 weight % to 0.56 weight %, 0.1 weight % to 0.5 weight %
Silicon (Si), 0.7 weight % to 6.5 weight % manganese (Mn), greater than 0 weight % but no more than the phosphorus (P) of 0.02 weight %, big
In 0 weight % but it is not more than the sulphur (S) of 0.02 weight %, the chromium (Cr) greater than 0 weight % but no more than 0.3 weight %, is greater than 0
The titanium (Ti) and rest part of weight % but boron (B), 0.01 weight % to 0.04 weight % no more than 0.004 weight %
For iron (Fe) and other inevitable impurity；
Hot rolling is carried out to steel billet under 850 DEG C to 950 DEG C of finishing mill delivery temperature, to form hot rolled plate；And
Then cooling hot-rolled plate is batched under 700 DEG C or higher coiling temperature.
8. according to the method described in claim 7, wherein, hot rolled coil include 0.21 weight % to 0.37 weight % carbon (C),
The silicon (Si) of 0.1 weight % to 0.4 weight %, the manganese (Mn) of 1.1 weight % to 1.5 weight % greater than 0 weight % but are not more than
The phosphorus (P) of 0.02 weight %, the sulphur (S) greater than 0 weight % but no more than 0.02 weight %, 0.1 weight % are to 0.3 weight %'s
Chromium (Cr), the boron (B) of 0.001 weight % to 0.004 weight %, 0.01 weight % to 0.04 weight % titanium (Ti), Yi Jiqi
Remaining part is divided into iron (Fe) and other inevitable impurity.
9. according to the method described in claim 7, wherein, then hot rolled plate is cooled down under 700 DEG C to 900 DEG C of coiling temperature
It is batched.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2016-0093096 | 2016-07-22 | ||
| KR1020160093096A KR101787275B1 (en) | 2016-07-22 | 2016-07-22 | Manufacturing method for hot rolled coil and method for correcting shape of hot rolled coil |
| PCT/KR2017/007870 WO2018016908A1 (en) | 2016-07-22 | 2017-07-21 | Method for manufacturing hot-rolled coil, and method for shape-correction of hot-rolled coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109477192A true CN109477192A (en) | 2019-03-15 |
| CN109477192B CN109477192B (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780045377.0A Active CN109477192B (en) | 2016-07-22 | 2017-07-21 | Method for producing a hot-rolled coil and method for shape correction of a hot-rolled coil |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20190270127A1 (en) |
| KR (1) | KR101787275B1 (en) |
| CN (1) | CN109477192B (en) |
| DE (1) | DE112017003683T5 (en) |
| WO (1) | WO2018016908A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115011872B (en) * | 2022-05-08 | 2023-06-16 | 江阴兴澄合金材料有限公司 | Manufacturing method of cold drawn round steel bar for high-dimensional-stability hydraulic valve core |
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| US4026495A (en) * | 1976-02-02 | 1977-05-31 | Aluminum Company Of America | Rotating tubing payoff system |
| JPH0924419A (en) * | 1995-07-13 | 1997-01-28 | Nippon Steel Metal Prod Co Ltd | Coil transfer carriage in uncoiler equipment |
| JP2005279762A (en) * | 2004-03-30 | 2005-10-13 | Jfe Steel Kk | Method and apparatus for measuring coil outside diameter |
| KR100782754B1 (en) * | 2006-07-11 | 2007-12-05 | 주식회사 포스코 | An apparatus for changing c-hook direction of wire-rod coil |
| JP2011240354A (en) * | 2010-05-17 | 2011-12-01 | Nippon Steel Corp | Method for manufacturing hot-rolled coil |
| CN102803541A (en) * | 2010-03-19 | 2012-11-28 | 杰富意钢铁株式会社 | Hot-rolled steel sheet having excellent cold working properties and hardening properties, and method for producing same |
| CN202667319U (en) * | 2012-06-15 | 2013-01-16 | 鞍钢股份有限公司 | Flattening-and-rolling prevention carrier roller device |
| JP2016089235A (en) * | 2014-11-07 | 2016-05-23 | Ｊｆｅスチール株式会社 | Hot rolled steel sheet for cold rolled steel sheet or for hot-dip galvanized steel sheet and method of producing the same |
| CN105728496A (en) * | 2016-03-11 | 2016-07-06 | 攀钢集团西昌钢钒有限公司 | Remedying and repairing method for flaw of thin-specification flat roll |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950010215B1 (en) | 1993-12-27 | 1995-09-12 | 포항종합제철주식회사 | Proofreading device for telescope of rolling coil |
-
2016
- 2016-07-22 KR KR1020160093096A patent/KR101787275B1/en active IP Right Grant
-
2017
- 2017-07-21 WO PCT/KR2017/007870 patent/WO2018016908A1/en active Application Filing
- 2017-07-21 US US16/319,254 patent/US20190270127A1/en not_active Abandoned
- 2017-07-21 CN CN201780045377.0A patent/CN109477192B/en active Active
- 2017-07-21 DE DE112017003683.6T patent/DE112017003683T5/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4026495A (en) * | 1976-02-02 | 1977-05-31 | Aluminum Company Of America | Rotating tubing payoff system |
| JPH0924419A (en) * | 1995-07-13 | 1997-01-28 | Nippon Steel Metal Prod Co Ltd | Coil transfer carriage in uncoiler equipment |
| JP2005279762A (en) * | 2004-03-30 | 2005-10-13 | Jfe Steel Kk | Method and apparatus for measuring coil outside diameter |
| KR100782754B1 (en) * | 2006-07-11 | 2007-12-05 | 주식회사 포스코 | An apparatus for changing c-hook direction of wire-rod coil |
| CN102803541A (en) * | 2010-03-19 | 2012-11-28 | 杰富意钢铁株式会社 | Hot-rolled steel sheet having excellent cold working properties and hardening properties, and method for producing same |
| JP2011240354A (en) * | 2010-05-17 | 2011-12-01 | Nippon Steel Corp | Method for manufacturing hot-rolled coil |
| CN202667319U (en) * | 2012-06-15 | 2013-01-16 | 鞍钢股份有限公司 | Flattening-and-rolling prevention carrier roller device |
| JP2016089235A (en) * | 2014-11-07 | 2016-05-23 | Ｊｆｅスチール株式会社 | Hot rolled steel sheet for cold rolled steel sheet or for hot-dip galvanized steel sheet and method of producing the same |
| CN105728496A (en) * | 2016-03-11 | 2016-07-06 | 攀钢集团西昌钢钒有限公司 | Remedying and repairing method for flaw of thin-specification flat roll |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101787275B1 (en) | 2017-10-19 |
| DE112017003683T5 (en) | 2019-04-04 |
| US20190270127A1 (en) | 2019-09-05 |
| WO2018016908A1 (en) | 2018-01-25 |
| CN109477192B (en) | 2021-03-16 |
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