CN106544485B - The manufacturing method of thin slab continuous casting and rolling great surface quality medium and high carbon steel - Google Patents
The manufacturing method of thin slab continuous casting and rolling great surface quality medium and high carbon steel Download PDFInfo
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- CN106544485B CN106544485B CN201610979698.5A CN201610979698A CN106544485B CN 106544485 B CN106544485 B CN 106544485B CN 201610979698 A CN201610979698 A CN 201610979698A CN 106544485 B CN106544485 B CN 106544485B
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- 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
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- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
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- 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
-
- 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
Abstract
The invention discloses a kind of manufacturing methods of thin slab continuous casting and rolling great surface quality medium and high carbon steel, include the following steps：1) it smelts and is casting continuously to form base, slab thickness is 50~70mm；2) continuous casting billet is heated in heating furnace, strand charging temperature is 812~1053 DEG C, and tapping temperature is 1107~1182 DEG C, and strand time inside furnace is 26~41min, and oxygen purity control is 1.1%~4.8% in burner hearth；Before entering heating furnace, go out to carry out high-pressure water descaling after heating furnace respectively；3) at least six passage finish rolling rolling is carried out, in finishing stands, first rack, the rolling reduction ratio control of the second rack carry out high-pressure water descaling respectively between 50%~60%, the first rack of finish rolling and the second rack, the second rack and third rack, and finish rolling finishing temperature is 880~910 DEG C；4) cooling batches to obtain finished steel coils.The thin slab continuous casting and rolling great surface quality medium and high carbon steel that this method is produced, only 3.9~6.9 μm of iron scale thickness, the volume fraction of FeO significantly reduces pickling difficulty, improves the surface quality of product up to 51%~72% in scale structure.
Description
Technical field
The present invention relates to a kind of great surface quality medium and high carbon steels, particularly relate to a kind of thin slab continuous casting and rolling great surface quality
The manufacturing method of medium and high carbon steel.
Background technology
Medium and high carbon steel has the characteristics that high intensity, high rigidity and high-wearing feature, be mainly used for making all kinds of cutting tools and
Special Tool is widely used in the fields such as papermaking, forestry, rubber, plastics, light textile, electric appliance, light industry and machinery.
At present, the technological process of production of most medium and high carbon steel products is：Steel-making → continuous casting → heating → hot rolling → pickling →
Cold rolling.Before medium and high carbon steel carries out cold rolling, need first to remove the iron scale of Surfaces of Hot Rolled Strip, then carry out next step
Deep processing generally uses removing method of the pickling as iron scale.The efficiency of pickling by steel surface iron scale thickness and
The influence of the factors such as structure.Under the premise of the acid washing conditions such as concentration, temperature in acid solution are identical, the thickness of iron scale is thinner,
The the FeO contents in scale structure the more more are conducive to pickling, and the thickness of iron scale is thicker, in scale structure
Fe3O4The content the more more are unfavorable for pickling, and pickling quality directly determines the surface quality of finished product.
The medium and high carbon steel produced using thin plate blank continuously casting and continuously rolling technology, due to charging temperature height, heating time is short, and iron sheet is thick
Spend it is relatively thin, and board briquette fluctuation it is small, iron sheet structure is more uniform, these features advantageously reduce the follow-up pickling of medium and high carbon steel
Difficulty is conducive to improve the surface quality of finished product.
Chinese patent ZL201210435101.2 discloses a kind of preparation method of easy pickled plate：Smelting molten steel and continuous casting
Into slab；Then with high-pressure water descaling, the slab after de-scaling is subjected to roughing, then carries out finish rolling, finish rolling postcooling to 500~
It is batched at 550 DEG C, 5~10 DEG C/min of cooldown rate after batching obtains the easy pickling of rolled of the content of FeO more than 25%
Steel grade batches when finish rolling postcooling is to 650~700 DEG C, 1~5 DEG C/min of cooldown rate after batching, and obtains iron scale FeO
Content less than 10%, the easy pickling steel grade of cold rolling state of even structure.This method can cause the more traditional work of iron scale thickness
20%~30% is thinned under the conditions of skill so that the pickling speed of strip is improved by 150~160m/min under conventional process conditions
To 180~200m/min, steel plate acid-washing quality not only ensure that, but also be effectively improved pickling efficiency.However, this method is only applicable in
In the mild steel of conventional hot continuous rolling machine producing line production, for the great surface quality medium and high carbon steel and discomfort of thin slab continuous casting and rolling production
With.
Invention content
The purpose of the present invention is to provide a kind of mass fraction suitable for carbon be 0.30%~0.79%, product thickness is
The manufacturing method of the thin slab continuous casting and rolling great surface quality medium and high carbon steel of 1.4mm~7.0mm.
To achieve the above object, the system of a kind of thin slab continuous casting and rolling great surface quality medium and high carbon steel provided by the present invention
Method is made, is connected for producing the sheet blank continuous casting that carbon mass fraction is 0.30%~0.79%, product thickness is 1.4~7.0mm
Great surface quality medium and high carbon steel is rolled, is included the following steps：
1) it smelts and is casting continuously to form base, slab thickness is 50~70mm；
2) continuous casting billet is heated in heating furnace, strand charging temperature is 812~1053 DEG C, tapping temperature 1107
~1182 DEG C, strand time inside furnace is 26~41min, and oxygen purity control is 1.1%~4.8% in burner hearth；Enter heating
Stokehold goes out to carry out high-pressure water descaling after heating furnace respectively；
3) it carries out at least six passage finish rolling to roll, in finishing stands, the first rack, the rolling reduction ratio control of the second rack exist
50%~60%, high-pressure water descaling, finish rolling are carried out respectively between the first rack of finish rolling and the second rack, the second rack and third rack
Finishing temperature is 880~910 DEG C；
4) cooling batches to obtain finished steel coils.
Preferably, in step 1), chemical composition as following weight percent is smelted：C：0.30%~0.79%,
Si：0.15%~0.40%, Mn：0.40%~1.70%, Cr：0.15%~1.10%, P：≤ 0.015%, S：≤
0.010%, N：≤ 0.008%, remaining is Fe and inevitable impurity.
Further, in step 1), chemical composition as following weight percent is smelted：C：0.30%~
0.79%, Si：0.17%~0.40%, Mn：0.69%~1.63%, Cr：0.18%~1.10%, P：≤ 0.011%, S：≤
0.005%, N：≤ 0.007%, remaining is Fe and inevitable impurity.
Preferably, in step 2), enter stokehold de-scaling water pressure for 34~40MPa, after coming out of the stove de-scaling water pressure for 24~
38MPa。
Preferably, in step 2), oxygen purity control is 3.2%~4.8% in burner hearth.Oxygen content controls herein
In the range of can further improve the content of FeO in iron scale.
Preferably, in step 3), the de-scaling water pressure of high-pressure water descaling is 10~15MPa between rack.
Preferably, in step 3), the muzzle velocity of strip is 8~18m/s at the end of control finish rolling, at the end of controlling finish rolling
Convexity≤60 μm of strip.Using the mill speed of 8~18m/s, iron scale thickness is advantageously reduced；At the end of controlling finish rolling
Strip profile≤60 μm be conducive to improve plate face iron scale uniformity.
Preferably, in step 4), cooling down the concrete mode batched is：Section cooling is carried out, with the cooling of 30~50 DEG C/s
Speed water cooling is to being batched after 550~700 DEG C；With air-cooled to 400~450 DEG C of the cooling velocity of 2~7 DEG C/min after batching,
Then it is air-cooled to room temperature.Using 550~700 DEG C of coiling temperatures and be quickly cooled down 400~450 DEG C be conducive to control iron scale
The content of middle FeO, makes it easily be acid washed, and is conducive to the surface quality of finished product.
The beneficial effects of the invention are as follows：
1) thickness of strand is only 50~70mm, and strand charging temperature is 812~1053 DEG C, and tapping temperature is only 1107~
1182 DEG C, strand time inside furnace is 26~41min, it is only necessary to which low temperature concurrent heating in short-term can reach target heating temperature and realize
The homogenization of temperature, therefore the iron scale of heating process generation can be greatly lowered；
2) oxygen content control range is 1.1%~4.8% in burner hearth, can effectively control oxidized iron sheets on surface of casting blank layer
Thickness and structure reduce the difficulty of de-scaling；Before entering heating furnace, go out after heating furnace and first and second rack of finish rolling, second and third
High-pressure water descaling is employed between rack, multiple de-scaling is effectively guaranteed scale removal effect；Using 880~910 DEG C of end
Temperature is rolled to be conducive to further reduce iron scale thickness；
3) the thin slab continuous casting and rolling great surface quality medium and high carbon steel that this method is produced, iron scale thickness only 3.9
~6.9 μm, the volume fraction of FeO significantly reduces pickling difficulty, improves finished product up to 51%~72% in scale structure
Surface quality.
Description of the drawings
Fig. 1 is the hot rolling microstructure shape appearance figure for the medium and high carbon steel that embodiment 4 is produced.
Fig. 2 is the decarburized structure shape appearance figure for the medium and high carbon steel that embodiment 4 is produced.
Fig. 3 is the medium and high carbon steel scale structure shape appearance figure that embodiment 4 is produced.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail.
The technical process of the manufacturing method of thin slab continuous casting and rolling great surface quality medium and high carbon steel of the present invention is：Molten iron
Cooling is batched → is controlled in the rack finish rolling → section cooling → of desulfurization → bessemerize → Argon → refining → continuous casting → soaking → seven,
Wherein, smelting process, including desulfurizing iron, bessemerize, Argon and refining is the prior arts, the present invention does not do expansion explanation.
This method is as follows：
1) it is smelted, the chemical composition ranges of the molten steel after refining process progress Alloying Treatment are C：0.30%~
0.79%, Si：0.17%~0.40%, Mn：0.69%~1.63%, Cr：0.18%~1.10%, P：≤ 0.011%, S：≤
0.005%, N：≤ 0.007%, remaining is Fe and inevitable impurity；
2) base is casting continuously to form, wherein：Thickness of strand is 50~70mm；Continuous casting billet is heated, strand charging temperature for 812~
1053 DEG C, tapping temperature is 1107~1182 DEG C, and strand time inside furnace is 26~41min, oxygen content control range in burner hearth
It is 1.1%~4.8%；Before entering heating furnace, go out the laggard horizontal high voltage water de-scaling of heating furnace, enter stokehold de-scaling water pressure for 34~
40MPa, de-scaling water pressure is 24~38MPa after coming out of the stove；
3) seven passage finish rolling rolling is carried out, the rolling reduction ratio control of first and second rack of finish rolling is 50%~60%, finish to gauge temperature
It is 880~910 DEG C to spend, 8~18m/s of muzzle velocity of the 7th rack strip of finish rolling, the strip profile at the end of control finish rolling≤
60 μm, first and second rack of finish rolling carries out high-pressure water descaling, 10~15MPa of de-scaling water pressure between second and third rack；
4) section cooling is carried out, with the cooling velocity water cooling of 30~50 DEG C/s to being batched after 550~700 DEG C, is batched
It is air-cooled to 400~450 DEG C with the cooling velocity of 2~7 DEG C/min afterwards, then it is air-cooled to room temperature；
The hot-rolled product thickness finally obtained be 1.4~7.0mm, 3.9~6.9 μm of iron scale thickness, iron oxide leather block
The content of FeO is 51%~72% in structure.
According to the difference of each step design parameter, the present invention provides following embodiments：
Embodiment 1
The chemical composition ranges of molten steel after refining process progress Alloying Treatment are C：0.30%, Si：0.17%, Mn：
0.69%, Cr：0.93%, P：0.011%, S：0.004%, N：0.005%, remaining is Fe and inevitable impurity；Continuous casting
Base thickness is 50mm；Strand is heated, strand charging temperature is 812 DEG C, and strand tapping temperature is 1107 DEG C, and strand is in stove
Time is 41min, and oxygen content control is 3.2% in burner hearth；Before entering heating furnace, go out the laggard horizontal high voltage water de-scaling of heating furnace, enter
Stokehold de-scaling water pressure 40MPa, de-scaling water pressure 24MPa after coming out of the stove；It is rolled, the rolling reduction ratio control of the 1st rack of finish rolling
52%, the rolling reduction ratio control of the 2nd rack of finish rolling is 60%, and finishing temperature is 907 DEG C, the outlet of the 7th rack strip of finish rolling
Speed is 18m/s, and strip profile is 26 μm, first and second rack of finish rolling, and high-pressure water descaling, de-scaling water are carried out between second and third rack
Pressure is respectively 15MPa and 10MPa；Section cooling is carried out, with the cooling velocity water cooling of 50 DEG C/s to being batched after 550 DEG C,
It is air-cooled to 450 DEG C with the cooling velocity of 7 DEG C/min after batching, then it is air-cooled to room temperature.
Embodiment 2
The chemical composition ranges of molten steel after refining process progress Alloying Treatment are C：0.41%, Si：0.40%, Mn：
0.89%, Cr：1.10%, P：0.008%, S：0.003%, N：0.007%, remaining is Fe and inevitable impurity；Continuous casting
Base thickness is 53mm；Strand is heated, strand charging temperature is 916 DEG C, and strand tapping temperature is 1143 DEG C, and strand is in stove
Time is 39min, and oxygen content control is 2.5% in burner hearth；Before entering heating furnace, go out the laggard horizontal high voltage water de-scaling of heating furnace, enter
Stokehold de-scaling water pressure 35MPa, de-scaling water pressure 38MPa after coming out of the stove；It is rolled, the rolling reduction ratio control of the 1st rack of finish rolling
60%, the rolling reduction ratio control of the 2nd rack of finish rolling is 52%, and finishing temperature is 910 DEG C, the outlet of the 7th rack strip of finish rolling
Speed is 15m/s, and strip profile is 34 μm, first and second rack of finish rolling, and high-pressure water descaling, de-scaling water are carried out between second and third rack
Pressure is respectively 13MPa and 12MPa；Section cooling is carried out, with the cooling velocity water cooling of 46 DEG C/s to being batched after 591 DEG C,
It is air-cooled to 432 DEG C with the cooling velocity of 5 DEG C/min after batching, then it is air-cooled to room temperature.
Embodiment 3
The chemical composition ranges of molten steel after refining process progress Alloying Treatment are C：0.54%, Si：0.29%, Mn：
1.63%, Cr：0.18%, P：0.007%, S：0.005%, N：0.006%, remaining is Fe and inevitable impurity；Continuous casting
Base thickness is 59mm；Strand is heated, strand charging temperature is 871 DEG C, and strand tapping temperature is 1129 DEG C, and strand is in stove
Time is 34min, and oxygen content control is 4.8% in burner hearth；Before entering heating furnace, go out the laggard horizontal high voltage water de-scaling of heating furnace, enter
Stokehold de-scaling water pressure 39MPa, de-scaling water pressure 31MPa after coming out of the stove；It is rolled, the rolling reduction ratio control of the 1st rack of finish rolling
50%, the rolling reduction ratio control of the 2nd rack of finish rolling is 57%, and finishing temperature is 880 DEG C, the outlet of the 7th rack strip of finish rolling
Speed is 11m/s, and strip profile is 43 μm, first and second rack of finish rolling, and high-pressure water descaling, de-scaling water are carried out between second and third rack
Pressure is respectively 13MPa and 15MPa；Section cooling is carried out, with the cooling velocity water cooling of 41 DEG C/s to being batched after 632 DEG C,
It is air-cooled to 400 DEG C with the cooling velocity of 6 DEG C/min after batching, then it is air-cooled to room temperature.
Embodiment 4
The chemical composition ranges of molten steel after refining process progress Alloying Treatment are C：0.66%, Si：0.23%, Mn：
1.05%, P：0.007%, S：0.005%, N：0.006%, remaining is Fe and inevitable impurity；Thickness of strand is
66mm；Strand is heated, strand charging temperature is 1053 DEG C, and strand tapping temperature is 1182 DEG C, and strand time inside furnace is
26min, oxygen content control is 4.1% in burner hearth；Before entering heating furnace, go out the laggard horizontal high voltage water de-scaling of heating furnace, enter stokehold and remove
Squama water pressure 34MPa, de-scaling water pressure 29MPa after coming out of the stove；Rolled, the rolling reduction ratio control of the 1st rack of finish rolling 56%,
The rolling reduction ratio control of the 2nd rack of finish rolling is 50%, and finishing temperature is 895 DEG C, and the muzzle velocity of the 7th rack strip of finish rolling is
10m/s, strip profile are 55 μm, first and second rack of finish rolling, and high-pressure water descaling, de-scaling water pressure point are carried out between second and third rack
It Wei not 10MPa and 12MPa；Section cooling is carried out, with the cooling velocity water cooling of 30 DEG C/s to being batched after 687 DEG C, after batching
It is air-cooled to 421 DEG C with the cooling velocity of 2 DEG C/min, then it is air-cooled to room temperature.
Embodiment 5
The chemical composition ranges of molten steel after refining process progress Alloying Treatment are C：0.79%, Si：0.33%, Mn：
0.71%, P：0.009%, S：0.003%, N：0.007%, remaining is Fe and inevitable impurity；Thickness of strand is
70mm；Strand is heated, strand charging temperature is 1005 DEG C, and strand tapping temperature is 1168 DEG C, and strand time inside furnace is
29min, oxygen content control is 1.1% in burner hearth；Before entering heating furnace, go out the laggard horizontal high voltage water de-scaling of heating furnace, enter stokehold and remove
Squama water pressure 37MPa, de-scaling water pressure 37MPa after coming out of the stove；Rolled, the rolling reduction ratio control of the 1st rack of finish rolling 57%,
The rolling reduction ratio control of the 2nd rack of finish rolling is 56%, and finishing temperature is 889 DEG C, and the muzzle velocity of the 7th rack strip of finish rolling is
8m/s, strip profile are 60 μm, first and second rack of finish rolling, and high-pressure water descaling, de-scaling water pressure point are carried out between second and third rack
It Wei not 11MPa and 14MPa；Section cooling is carried out, with the cooling velocity water cooling of 37 DEG C/s to being batched after 700 DEG C, after batching
It is air-cooled to 441 DEG C with the cooling velocity of 3 DEG C/min, then it is air-cooled to room temperature.
The examination and test of products
The every mechanical property and iron scale of each embodiment hot rolling medium and high carbon steel product are detected, under testing result
Shown in table 1.
1 each embodiment product mechanical property of table and iron scale detection table
The pattern of hot rolling medium and high carbon steel product produced to embodiment 4 is tested, and Fig. 1 is hot rolling microstructure pattern, by
Figure is as it can be seen that be organized as lamellar pearlite+net carbide after rolling.Fig. 2 is decarburized structure pattern, as seen from the figure, single side decarburized layer
Average thickness is 14 μm, and single side decarburization stratum proportion is 0.61%.Fig. 3 is scale structure pattern, as seen from the figure, iron scale
Structure is mainly by FeO and Fe3O4Composition, iron scale thickness range are 4.2~5.1 μm, the content of FeO in scale structure
About 68%.
Claims (7)
1. a kind of manufacturing method of thin slab continuous casting and rolling great surface quality medium and high carbon steel, is for producing carbon mass fraction
0.30%~0.79%, thin slab continuous casting and rolling great surface quality medium and high carbon steel of the product thickness for 1.4~7.0mm, feature
It is：This method comprises the following steps：
1) chemical composition as following weight percent is smelted：C：0.30%~0.79%, Si：0.15%~0.40%,
Mn：0.40%~1.70%, Cr：0.15%~1.10%, P：≤ 0.015%, S：≤ 0.010%, N：≤ 0.008%, remaining
For Fe and inevitable impurity；Base is casting continuously to form, slab thickness is 50~70mm；
2) continuous casting billet is heated in heating furnace, strand charging temperature is 812~1053 DEG C, tapping temperature for 1107~
1182 DEG C, strand time inside furnace is 26~41min, and oxygen purity control is 1.1%~4.8% in burner hearth；Enter heating furnace
Before, go out to carry out high-pressure water descaling after heating furnace respectively；
3) it carries out at least six passage finish rolling to roll, in finishing stands, the first rack, the rolling reduction ratio control of the second rack are 50%
~60%, high-pressure water descaling, finish rolling finish to gauge are carried out between the first rack of finish rolling and the second rack, the second rack and third rack respectively
Temperature is 880~910 DEG C；
4) cooling batches to obtain finished steel coils.
2. the manufacturing method of thin slab continuous casting and rolling great surface quality medium and high carbon steel according to claim 1, feature exist
In：In step 1), chemical composition as following weight percent is smelted：C：0.30%~0.79%, Si：0.17%~
0.40%, Mn：0.69%~1.63%, Cr：0.18%~1.10%, P：≤ 0.011%, S：≤ 0.005%, N：≤
0.007%, remaining is Fe and inevitable impurity.
3. the manufacturing method of thin slab continuous casting and rolling great surface quality medium and high carbon steel according to claim 1 or 2, feature
It is：In step 2), enter stokehold de-scaling water pressure for 34~40MPa, de-scaling water pressure is 24~38MPa after coming out of the stove.
4. the manufacturing method of thin slab continuous casting and rolling great surface quality medium and high carbon steel according to claim 1 or 2, feature
It is：In step 2), oxygen purity control is 3.2%~4.8% in burner hearth.
5. the manufacturing method of thin slab continuous casting and rolling great surface quality medium and high carbon steel according to claim 1 or 2, feature
It is：In step 3), the de-scaling water pressure of high-pressure water descaling is 10~15MPa between rack.
6. the manufacturing method of thin slab continuous casting and rolling great surface quality medium and high carbon steel according to claim 1 or 2, feature
It is：In step 3), the muzzle velocity of strip is 8~18m/s at the end of control finish rolling, the convexity of strip at the end of control finish rolling
≤60μm。
7. the manufacturing method of thin slab continuous casting and rolling great surface quality medium and high carbon steel according to claim 1 or 2, feature
It is：In step 4), cooling down the concrete mode batched is：Section cooling is carried out, with the cooling velocity water cooling of 30~50 DEG C/s extremely
It is batched after 550~700 DEG C；It is air-cooled to 400~450 DEG C with the cooling velocity of 2~7 DEG C/min after batching, then it is air-cooled to
Room temperature.
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| CN109321729B (en) * | 2018-11-28 | 2020-01-24 | 武汉科技大学 | Rolling method of high-carbon steel |
| CN109628715A (en) * | 2018-12-28 | 2019-04-16 | 首钢集团有限公司 | It is a kind of for improving the cooling means of coil of strip quality |
| CN110317995B (en) * | 2019-06-03 | 2020-08-25 | 武汉钢铁有限公司 | Method for producing thin medium-carbon hot-rolled steel plate with good surface quality by using CSP (cast Steel plate) |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012528A (en) * | 2007-01-25 | 2007-08-08 | 鞍钢股份有限公司 | Surface iron scale control method for middle sheet billet continuous casting and rolling steel plate |
| CN101181718A (en) * | 2007-12-11 | 2008-05-21 | 武汉钢铁(集团)公司 | Method for producing wide strip steel by bar strip continuous casting and rolling as well as system therefor |
| CN101333629A (en) * | 2008-07-10 | 2008-12-31 | 湖南华菱涟源钢铁有限公司 | Method for producing medium-high-carbon high-strength steel based on sheet bar technology |
| CN101947557A (en) * | 2010-08-27 | 2011-01-19 | 攀钢集团钢铁钒钛股份有限公司 | Preparation method for reducing scales generated on surfaces of hot-rolled steel plates |
| WO2012036483A2 (en) * | 2010-09-16 | 2012-03-22 | 주식회사 포스코 | High-carbon hot-rolled steel sheet, cold-rolled steel sheet and a production method therefor |
| CN104278201A (en) * | 2014-10-11 | 2015-01-14 | 武汉钢铁(集团)公司 | Preparation method of high carbon steel with good cold mouldability |
| CN104438326A (en) * | 2014-10-17 | 2015-03-25 | 武汉钢铁(集团)公司 | Rolling technology for high-carbon steel in thin slab casting and rolling |
| CN105002434A (en) * | 2015-08-13 | 2015-10-28 | 武汉钢铁(集团)公司 | Hot-rolled steel for steel disc of vehicle driven plate and preparation method of hot-rolled steel |
| CN105256235A (en) * | 2015-11-19 | 2016-01-20 | 攀钢集团西昌钢钒有限公司 | High-pressure gas cylinder steel and method for removing scale on surface of high-pressure gas cylinder steel |
-
2016
- 2016-11-08 CN CN201610979698.5A patent/CN106544485B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012528A (en) * | 2007-01-25 | 2007-08-08 | 鞍钢股份有限公司 | Surface iron scale control method for middle sheet billet continuous casting and rolling steel plate |
| CN101181718A (en) * | 2007-12-11 | 2008-05-21 | 武汉钢铁(集团)公司 | Method for producing wide strip steel by bar strip continuous casting and rolling as well as system therefor |
| CN101333629A (en) * | 2008-07-10 | 2008-12-31 | 湖南华菱涟源钢铁有限公司 | Method for producing medium-high-carbon high-strength steel based on sheet bar technology |
| CN101947557A (en) * | 2010-08-27 | 2011-01-19 | 攀钢集团钢铁钒钛股份有限公司 | Preparation method for reducing scales generated on surfaces of hot-rolled steel plates |
| WO2012036483A2 (en) * | 2010-09-16 | 2012-03-22 | 주식회사 포스코 | High-carbon hot-rolled steel sheet, cold-rolled steel sheet and a production method therefor |
| CN104278201A (en) * | 2014-10-11 | 2015-01-14 | 武汉钢铁(集团)公司 | Preparation method of high carbon steel with good cold mouldability |
| CN104438326A (en) * | 2014-10-17 | 2015-03-25 | 武汉钢铁(集团)公司 | Rolling technology for high-carbon steel in thin slab casting and rolling |
| CN105002434A (en) * | 2015-08-13 | 2015-10-28 | 武汉钢铁(集团)公司 | Hot-rolled steel for steel disc of vehicle driven plate and preparation method of hot-rolled steel |
| CN105256235A (en) * | 2015-11-19 | 2016-01-20 | 攀钢集团西昌钢钒有限公司 | High-pressure gas cylinder steel and method for removing scale on surface of high-pressure gas cylinder steel |
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