CN109234613A - The production method of hot-rolled coil and hot-rolled coil - Google Patents
The production method of hot-rolled coil and hot-rolled coil Download PDFInfo
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- CN109234613A CN109234613A CN201810970683.1A CN201810970683A CN109234613A CN 109234613 A CN109234613 A CN 109234613A CN 201810970683 A CN201810970683 A CN 201810970683A CN 109234613 A CN109234613 A CN 109234613A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 10
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 4
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000011575 calcium Substances 0.000 claims description 15
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 12
- 229910052791 calcium Inorganic materials 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 239000011572 manganese Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 5
- 239000010955 niobium Substances 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 229910000592 Ferroniobium Inorganic materials 0.000 claims description 4
- 238000009749 continuous casting Methods 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 4
- ZFGFKQDDQUAJQP-UHFFFAOYSA-N iron niobium Chemical compound [Fe].[Fe].[Nb] ZFGFKQDDQUAJQP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000007670 refining Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 238000004886 process control Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 11
- 238000002360 preparation method Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000005728 strengthening Methods 0.000 abstract description 5
- 238000005275 alloying Methods 0.000 abstract description 4
- 238000005098 hot rolling Methods 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- 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
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
- C22C38/04—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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention provides the production methods of a kind of hot-rolled coil and hot-rolled coil, wherein hot-rolled coil, by percentage to the quality, chemical component are as follows: C 0.16~0.20%, Si 0.10~0.50%, Mn 1.20~1.50%, P≤0.030%, S≤0.030%, Nb 0.007~0.070%, Als 0.020~0.050, Ca 0.0010~0.0030%, N≤0.009, surplus are Fe and the other relict elements of raw material.According to the technical solution of the present invention, by using the think gauge hot-rolled coil preparation process and method of C-Mn-Nb low-alloy low cost, using addition trace alloying element, utilize 2250mm hot rolling producing line advantage, utilize cooling controlling and rolling controlling process, the matching that intensity and plasticity are further realized by refined crystalline strengthening mechanism, promotes the comprehensive mechanical performance of material, has a good application prospect.Hot-rolled coil prepared by the present invention can satisfy thickness in the properties of the hot-rolled coil of 18mm~25mm, can not only guarantee that hot-rolled coil self-strength and plasticity match, but also ensure the excellent performance of product after pipe is made in material.
Description
Technical field
The present invention relates to metallurgical technology fields, in particular to a kind of hot-rolled coil and a kind of production of hot-rolled coil
Method.
Background technique
Currently, the petroleum casing pipe exploitation of think gauge is in the starting stage, most of the country iron and steel enterprise not can guarantee production
Product have some strength and elongation, and not can guarantee hot-rolled coil and the performance standard for reaching product after pipe is made.Therefore, in order to
Meet the properties after hot-rolled coil and tubulation simultaneously, needs to design the preparation method of a set of think gauge hot-rolled coil.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, it is an object of the present invention to provide a kind of hot-rolled coils.
It is another object of the present invention to provide a kind of production methods of hot-rolled coil.
In view of this, the technical solution of first aspect present invention provides a kind of hot-rolled coil, by percentage to the quality,
Chemical component are as follows: C 0.16~0.20%, Si 0.10~0.50%, Mn 1.20~1.50%, P≤0.030%, S≤
0.030%, Nb 0.007~0.070%, Als 0.020~0.050, Ca 0.0010~0.0030%, N≤0.009, surplus
For Fe and the other relict elements of raw material.
The technical solution of second aspect of the present invention proposes a kind of production method of hot-rolled coil, for producing first aspect
Technical solution hot-rolled coil, comprising: refining procedure: LF furnace carry out slag making, deoxidation, desulfurization and removal of inclusions it is excessively program-controlled
System is added the alloys such as manganese iron, ferrosilicon, ferro-niobium according to molten steel composition and finely tunes molten steel composition to target zone, feeds calcium line and carry out calcium
Processing, Calcium treatment, which finishes, guarantees that the soft blow time is greater than 8min；Continuous casting working procedure: the steel grade liquidus temperature is 1513 DEG C, the first packet
25~40 DEG C of the Metal in Tundish degree of superheat, 15~30 DEG C of other heat of molten steel degrees of superheat；Casting machine uses permanent pulling rate, control range:
1.0~1.5m/min；Hot-rolled process: slab heating temperature is controlled at 1180~1220 DEG C；Time inside furnace control 180~
300min；Soaking temperature is controlled at 1190~1230 DEG C；Roughing uses 3+3 mode or 1+5 mode；The control of finish rolling start rolling temperature
At 950~1050 DEG C；Finishing temperature control is at 830~880 DEG C；Coiling temperature is at 550~610 DEG C.
Further, the hot-rolled process specifically includes: slab heating temperature control is at 1180 ± 20 DEG C, time inside furnace control
System is in >=180min；High pressure water dephosphorization；Press machine fixed width；The rolling of E1R1 roughing mill and the rolling of E2R2 roughing mill, roughing mode are adopted
1 passage is rolled with 1# roughing mill, 2# roughing mill rolls 5 passages；Or 1# roughing mill rolls 3 passages, 2# roughing mill rolls 3 passages；
Roughing mill finishing temperature≤1100 DEG C；Flying shear；High pressure water dephosphorization；The rolling of 2250mm finishing mill, finish rolling start rolling temperature are controlled 950
~1050 DEG C；Finishing temperature control is at 830~880 DEG C；Section cooling is encrypted, the control of steel band cooling velocity is uniform at 15~25 DEG C
It is cooling.
One or more technical solution provided by the invention, has at least the following technical effects or advantages:
It is micro- using being added by using the think gauge hot-rolled coil preparation process and method of C-Mn-Nb low-alloy low cost
Alloying element is measured, is further realized by refined crystalline strengthening mechanism using 2250mm hot rolling producing line advantage using cooling controlling and rolling controlling process
The matching of intensity and plasticity promotes the comprehensive mechanical performance of material, has a good application prospect.Hot rolled coil prepared by the present invention
Plate can satisfy thickness in the properties of the hot-rolled coil of 18mm~25mm, can not only guarantee hot-rolled coil self-strength and
Plasticity matches, and ensures the excellent performance of product after pipe is made in material.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Specific embodiment
In order to be more clearly understood that aforementioned aspect of the present invention, feature and advantage, With reference to embodiment
The present invention is further described in detail.It should be noted that in the absence of conflict, embodiments herein and reality
The feature applied in example can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Embodiment 1:
The hot-rolled coil of embodiment according to the present invention, by percentage to the quality, chemical component are as follows: C0.16~
0.20%, Si 0.10~0.50%, Mn 1.20~1.50%, P≤0.030%, S≤0.030%, Nb0.007~
0.070%, Als 0.020~0.050, Ca 0.0010~0.0030%, N≤0.009, surplus are Fe and the other residuals of raw material
Element.
In the element of addition, Mn is mainly present in product tissue in a manner of solid solution, improves intensity by solution strengthening；Nb
Play refined crystalline strengthening, not only improved the intensity of material but also guarantees the plasticity index of material.
Embodiment 2:
The production method of the hot-rolled coil of embodiment according to the present invention, comprising: refining procedure: LF furnace carries out slag making, takes off
Oxygen, desulfurization and removal of inclusions process control are added the alloys such as manganese iron, ferrosilicon, ferro-niobium according to molten steel composition and finely tune molten steel composition
To target zone, feeds calcium line and carry out Calcium treatment, Calcium treatment, which finishes, guarantees that the soft blow time is greater than 8min；Continuous casting working procedure: the steel grade
Liquidus temperature is 1513 DEG C, first 25~40 DEG C of the packet Metal in Tundish degree of superheat, 15~30 DEG C of other heat of molten steel degrees of superheat；
Casting machine is using permanent pulling rate, control range: 1.0~1.5m/min；Hot-rolled process: slab heating temperature is controlled 1180~1220
℃；Time inside furnace is controlled in 180~300min；Soaking temperature is controlled at 1190~1230 DEG C；Roughing uses 3+3 mode or 1+
5 modes；Finish rolling start rolling temperature is controlled at 950~1050 DEG C；Finishing temperature control is at 830~880 DEG C；Coiling temperature 550~
610℃。
Further, the hot-rolled process specifically includes: slab heating temperature control is at 1180 ± 20 DEG C, time inside furnace control
System is in >=180min；High pressure water dephosphorization；Press machine fixed width；The rolling of E1R1 roughing mill and the rolling of E2R2 roughing mill, roughing mode are adopted
1 passage is rolled with 1# roughing mill, 2# roughing mill rolls 5 passages；Or 1# roughing mill rolls 3 passages, 2# roughing mill rolls 3 passages；
Roughing mill finishing temperature≤1100 DEG C；Flying shear；High pressure water dephosphorization；The rolling of 2250mm finishing mill, finish rolling start rolling temperature are controlled 950
~1050 DEG C；Finishing temperature control is at 830~880 DEG C；Section cooling is encrypted, the control of steel band cooling velocity is uniform at 15~25 DEG C
It is cooling.
It is micro- using being added by using the think gauge hot-rolled coil preparation process and method of C-Mn-Nb low-alloy low cost
Alloying element is measured, is further realized by refined crystalline strengthening mechanism using 2250mm hot rolling producing line advantage using cooling controlling and rolling controlling process
The matching of intensity and plasticity promotes the comprehensive mechanical performance of material, has a good application prospect.Hot rolled coil prepared by the present invention
Plate can satisfy thickness in the properties of the hot-rolled coil of 18mm~25mm, can not only guarantee hot-rolled coil self-strength and
Plasticity matches, and ensures the excellent performance of product after pipe is made in material.
Specific embodiment
1. the smelting of material
1.1 converters: tapping temperature >=1620 DEG C guarantee that ingredient and temperature are coordinated to tap；If new tapping hole tapping temperature exists
Take the circumstances into consideration to improve 10~15 DEG C on the basis of temperature upper limit.The steel grade carries out alloying using alloys such as manganese iron, ferrosilicon, and final deoxidizing is adopted
With ferro-aluminum deoxidation.
1.2 refinings: LF furnace carries out slag making, deoxidation, desulfurization and removal of inclusions process control, and manganese is added according to molten steel composition
The alloys such as iron, ferrosilicon, ferro-niobium finely tune molten steel composition to target zone, feed calcium line and carry out Calcium treatment, it is soft that Calcium treatment finishes guarantee
The time is blown greater than 8min.
1.3 continuous castings: the steel grade liquidus temperature is 1513 DEG C, and first 25~40 DEG C of the packet Metal in Tundish degree of superheat is other
15~30 DEG C of the heat of molten steel degree of superheat.
2. cooling controlling and rolling controlling process
Using stepped heating stove heating slab, concrete technology is shown in Table 1, and roughing uses 3+3 mode or 1+5 mode, essence
It rolls using F1~F7.
1 slab heating technique parameter of table
| Slab thickness mm | Heating temperature DEG C | Time inside furnace min | Soaking temperature DEG C | Soaking time min | Tapping temperature DEG C |
| 230 | 1180~1220 | 180~300 | 1190~1230 | 40~60 | 1210±20 |
2 rolling technological parameter of table
The analysis of 3 embodiments
3.1 according to the above smelting requirements, and the chemical component for smelting think gauge product is shown in Table 3.
3 think gauge casing chemical component of table
| Element | C | Si | Mn | P | S | Nb | Als | Ca | N |
| Target | 0.17 | 0.15 | 1.30 | 0.010 | 0.005 | 0.010 | 0.030 | 0.0020 | 0.004 |
3.2 according to mentioned component design and hot rolling technology, produces tensile property and impact that product thickness is 24.5mm
Performance is shown in Table 4, and test method is referring to GB/T 228 and 229 standard of GB/T.
The tensile property and impact property of 4 product of table
The metallographic structure of 3.3 products is ferrite+bainite, and specific tissue topography is as shown in Figure 1.
In conclusion hot-rolled coil intensity with higher and toughness that the present invention designs and develops, are widely used in petroleum
The oil well casing field of industry and natural gas industry, all standard are all satisfied API Spec 5CT 9th standard requirements.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of hot-rolled coil, which is characterized in that by percentage to the quality, chemical component are as follows: C 0.16~0.20%, Si
0.10~0.50%, Mn 1.20~1.50%, P≤0.030%, S≤0.030%, Nb 0.007~0.070%, Als
0.020~0.050, Ca 0.0010~0.0030%, N≤0.009, surplus are Fe and the other relict elements of raw material.
2. a kind of production method of hot-rolled coil, for producing hot-rolled coil as described in claim 1, which is characterized in that
Include:
Refining procedure: LF furnace carry out slag making, deoxidation, desulfurization and removal of inclusions process control, according to molten steel composition be added manganese iron,
The alloys such as ferrosilicon, ferro-niobium finely tune molten steel composition to target zone, feed calcium line and carry out Calcium treatment, when Calcium treatment finishes guarantee soft blow
Between be greater than 8min；
Continuous casting working procedure: the steel grade liquidus temperature is 1513 DEG C, first 25~40 DEG C of the packet Metal in Tundish degree of superheat, other heats
15~30 DEG C of molten steel overheat；Casting machine is using permanent pulling rate, control range: 1.0~1.5m/min；
Hot-rolled process: slab heating temperature is controlled at 1180~1220 DEG C；Time inside furnace is controlled in 180~300min；Soaking temperature
Degree control is at 1190~1230 DEG C；Roughing uses 3+3 mode or 1+5 mode；Finish rolling start rolling temperature is controlled 950~1050
℃；Finishing temperature control is at 830~880 DEG C；Coiling temperature is at 550~610 DEG C.
3. the production method of hot-rolled coil according to claim 2, which is characterized in that the hot-rolled process specifically includes:
At 1180 ± 20 DEG C, time inside furnace is controlled in >=180min for slab heating temperature control；
High pressure water dephosphorization；
Press machine fixed width；
The rolling of E1R1 roughing mill and the rolling of E2R2 roughing mill, roughing mode roll 1 passage, the rolling of 2# roughing mill using 1# roughing mill
5 passages；Or 1# roughing mill rolls 3 passages, 2# roughing mill rolls 3 passages；Roughing mill finishing temperature≤1100 DEG C；
Flying shear；
High pressure water dephosphorization；
The rolling of 2250mm finishing mill, finish rolling start rolling temperature are controlled at 950~1050 DEG C；Finishing temperature control is at 830~880 DEG C；
Section cooling is encrypted, the control of steel band cooling velocity is uniformly cooling at 15~25 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810970683.1A CN109234613A (en) | 2018-08-24 | 2018-08-24 | The production method of hot-rolled coil and hot-rolled coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810970683.1A CN109234613A (en) | 2018-08-24 | 2018-08-24 | The production method of hot-rolled coil and hot-rolled coil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205546A (en) * | 2019-06-12 | 2019-09-06 | 包头钢铁（集团）有限责任公司 | A kind of yield strength is greater than the petroleum casing pipe and preparation method thereof of 450MPa |
| CN110303066A (en) * | 2019-07-31 | 2019-10-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel for oil casing with high transverse impact energy and manufacturing method thereof |
| CN110343958A (en) * | 2019-07-25 | 2019-10-18 | 包头钢铁（集团）有限责任公司 | A kind of tensile strength 500MPa grades of automobile axle housing roll bendings and preparation method thereof |
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| CN102400040A (en) * | 2010-09-07 | 2012-04-04 | 鞍钢股份有限公司 | A low-carbon bainitic steel hot-rolled coil for low temperature and its production method |
| CN102719743A (en) * | 2012-06-27 | 2012-10-10 | 山西太钢不锈钢股份有限公司 | Hot-rolled coil plate for oil casing and manufacturing method thereof |
| KR20160036813A (en) * | 2014-09-26 | 2016-04-05 | 현대제철 주식회사 | Carbon steel and method of manufacturing the carbon steel |
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| CN110205546A (en) * | 2019-06-12 | 2019-09-06 | 包头钢铁（集团）有限责任公司 | A kind of yield strength is greater than the petroleum casing pipe and preparation method thereof of 450MPa |
| CN110343958A (en) * | 2019-07-25 | 2019-10-18 | 包头钢铁（集团）有限责任公司 | A kind of tensile strength 500MPa grades of automobile axle housing roll bendings and preparation method thereof |
| CN110303066A (en) * | 2019-07-31 | 2019-10-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel for oil casing with high transverse impact energy and manufacturing method thereof |
| CN110303066B (en) * | 2019-07-31 | 2021-01-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel for petroleum casing pipe with high transverse impact energy and manufacturing method thereof |
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