CN107142364A - A kind of super-purity ferrite stainless steel double roll strip casting rolling production process - Google Patents
A kind of super-purity ferrite stainless steel double roll strip casting rolling production process Download PDFInfo
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- CN107142364A CN107142364A CN201710288312.0A CN201710288312A CN107142364A CN 107142364 A CN107142364 A CN 107142364A CN 201710288312 A CN201710288312 A CN 201710288312A CN 107142364 A CN107142364 A CN 107142364A
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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
-
- 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
- B21B1/463—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 in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
Abstract
The present invention relates to a kind of super-purity ferrite stainless steel thin-belt casting rolling production technology, comprise the following steps：（1）The qualified molten steel of composition is hoisted to bale panoramic tables；（2）Molten steel is injected into tundish；（3）Double-roller rolling；（4）Made-up belt hot rolling；（5）The cooling and excision of strip are end to end；（6）Strip coiling.The present invention directly produces super-purity ferrite stainless steel strip by double-roller rolling, utilize this feature of molten steel quick solidification in strip casting process, tiny, homogeneous cast-rolling thin strip is obtained, after rolling, annealing, the production board with good formability and resistance to surface fold performance is obtained.After double-roller rolling, hot rolling only needs to roll the production that a time is achieved that 0.8 3.0mm thickness specifications, solves the technical barrier of hot-rolling sticking.
Description
Technical field
The invention belongs to stainless steel strip metallurgical engineering technical field, and in particular to a kind of super-purity ferrite stainless steel strip
Casting and rolling production process.
Background technology
Extremely low carbon and nitrogen content be also while super-purity ferrite stainless steel has conventional ferrite stainless steel advantage concurrently, in steel
It greatly improved its weldability, toughness and modeling brittle transition temperature be reduced to below room temperature, while also having excellent resistance to
The advantages of corrosion and good processing characteristics.Super-purity ferrite stainless steel with its excellent performance and high cost performance, make its
In the market has very strong competitiveness, there is very big application prospect in every profession and trade.
In traditional handicraft casting super-purity ferrite stainless steel production process, ferritic stainless steel thermal conductivity is good, using biography
During thickness slab of uniting casting machine production（220mm is thick）, the easy through-thickness fast-growth of crystal grain, the flourishing column crystal of formation, column
Brilliant ratio is sometimes even up to 70%-80%.Columanar structure will deteriorate the formability of production board, aggravate surface fold degree.Cause
This, refines continuous casting billet tissue, and expanding equiaxial crystal ratio turns into the primary hand of improvement ferritic stainless steel formability and surface quality
Section.At present, part Stainless Steel Plant uses multiple means, such as adds and is adopted in niobium, titanium microalloy element, casting process
With electromagnetic agitation, suitable control continuous casting two cold section cooling water flow etc., but effect is unsatisfactory.
In addition, during traditional handicraft rolling super-purity ferrite stainless steel, in order to realize by strand rolling thick 220mm
2.5-3.5mm thickness specifications, are rolled using multi-pass, big pressure, because super-purity ferrite stainless steel cylinder block strength is low, in production
The middle hot-rolling sticking that there are problems that protrusion, occurs after hot-rolling sticking, ferritic stainless steel hot-rolling annealing and pickling plate surface can be formed
Along roll to linear surfaces defect, weakened after cold rolling, but still there are some line defects to leave production board.And occur
The work roll surface of hot-rolling sticking becomes rough, it is impossible to proceed rolling.Hot-rolling sticking makes stocking surface matter
Amount deteriorates, and adds the reconditioning cost of strip, while shortening the roller labour life-span of roll, reduces production efficiency.
The content of the invention
The technical problems to be solved by the invention are the problem of presence for prior art, and provide a kind of super-purity ferrite
Stainless steel strip casting and rolling production process, the present invention prepares super-purity ferrite stainless steel strip using dual-roller thin-belt casting rolling technology.
Technical problem for the solution present invention is adopted the following technical scheme that：
A kind of super-purity ferrite stainless steel double roll strip casting rolling production process, is comprised the following steps that：
（1）The qualified molten steel of composition is hoisted to bale panoramic tables：Super-purity ferrite stainless steel after LF ladle refining furnaces are refined
Molten steel is hoisted to bale panoramic tables, calm 15-25min；
（2）Molten steel is injected into tundish：Tundish blowing argon gas 10-20min drive out of in bag after air by long nozzle by molten steel from
Ladle is injected into tundish, and degree of superheat control is added on 20 DEG C -40 DEG C, molten steel for being incubated and adsorbing the centre being mingled with
Covering agent；
（3）Double-roller rolling：Molten steel is injected in twin-roll cast-rolling mill by submersed nozzle, and strand speed is 80-150 m/min, casting
Roller gap is adjustable between 1.5-4.0mm, is carried out during MOLTEN STEEL FLOW using the mixed gas of argon gas or argon gas and hydrogen
Protection, molten steel is in Casting Roller in process of setting, and cooldown rate control range is 500-950 DEG C/s；
（4）Made-up belt hot rolling：Roll casting sheet is in the mixed gas protected lower carry out hot rolling of argon gas or argon gas and hydrogen, and made-up belt is through pinching
Roller is sent to hot-rolling mill and carries out constant-tension rolling, and mill speed is 128-280 m/min, and wherein made-up belt hot-rolled temperature control is
1050-1150 DEG C, belt steel thickness control range is 0.8-2.5mm after made-up belt hot rolling；
（5）The cooling and excision of strip are end to end
Strip cooling after hot rolling, is sent to cutter through pinch roll and carries out the excision of strip end to end；
（6）Strip coiling
Strip after excision end to end is sent to coiling machine through pinch roll and carries out strip coiling, obtains finished product thin strip steel coil.
The step（3）Middle protective gas pressure is 0.3-0.5MPa.
The step（3）The volume ratio of middle argon gas and hydrogen is 3: 1.
The step（4）Middle protective gas pressure is 0.3-0.5MPa.
The step（4）The volume ratio of middle argon gas and hydrogen is 3: 1.
The step（5）Strip after middle hot rolling is cooled to 650-700 DEG C through cooling facility for laminar flow.
Double-roll type thin-belt casting rolling technology is metallurgical cutting edge technology, and commercial Application has been realized in carbon steel production.We are according to double
The characteristics of roll-type thin-belt casting rolling technique, it is incorporated among the production of super-purity ferrite stainless steel, by rational matching thickness, pours
The key process parameters such as temperature, teeming speed, cooldown rate are cast, high-quality, inexpensive qualified super-purity ferrite stainless steel is realized
The production of product.Beneficial effects of the present invention are：（1）Using this feature of molten steel quick solidification in strip casting process, obtain thin
Small, homogeneous cast-rolling thin strip, after rolling, annealing, obtains the production board with good formability and resistance to surface fold performance.
（2）After double-roller rolling, due to original Cast Strip thickness of thin, and roll at high temperature, hot rolling only needs to roll a time, so that it may realize
The production of 0.8-3.0mm thickness specification products, and effectively solve the technical barrier of hot-rolling sticking.（3）Casting and hot rolled
Cheng Quancheng is mixed gas protected using argon gas or argon gas and hydrogen, and Molten Steel Cleanliness is high, and scale on surface is thin, beneficial to raising
Product surface quality, and the subsequently reduction of pickling cost, the raising of production efficiency.
Brief description of the drawings
Fig. 1 is super-purity ferrite stainless steel thin-belt casting rolling production procedure schematic diagram of the present invention.
Embodiment
In conjunction with specific embodiments, the present invention is described in further detail, but the implementation of the present invention is not limited to this.
Embodiment 1
A kind of thickness 0.8mm, the super-purity ferrite stainless steel strip product of steel grade 444 casting and rolling production process, comprise the following steps：
（1）The qualified molten steel of composition is hoisted to bale panoramic tables：Super-purity ferrite stainless steel after LF ladle refining furnaces are refined
Molten steel is hoisted to bale panoramic tables, calm 25min；
（2）Molten steel is injected into tundish：Tundish blowing argon gas 20min is driven out of molten steel in bag after air by long nozzle from ladle
It is injected into tundish, the degree of superheat is controlled at 30 DEG C, is added above molten steel for being incubated and adsorbing the tundish covering flux being mingled with；
（3）Double-roller rolling：Molten steel is injected into twin-roll cast-rolling mill by submersed nozzle, and strand speed is 150m/min, casting
Roller presets roll gap for 1.5mm, is protected during MOLTEN STEEL FLOW using the mixed gas of argon gas, protective gas pressure
The made-up belt thickness obtained after 0.5MPa, casting is 1.5mm, molten steel in Casting Roller in process of setting, cooldown rate is 950 DEG C/
s；
（4）Made-up belt hot rolling：Roll casting sheet carries out hot rolling, protective gas pressure 0.5MPa under using argon gas protection.Made-up belt is through folder
Send roller to be sent to hot-rolling mill and carry out constant-tension rolling, the m/min of mill speed 280,1150 DEG C of made-up belt hot-rolled temperature, after made-up belt hot rolling
Belt steel thickness control is 0.8mm；
（5）The cooling and excision of strip are end to end
When temperature is cooled to 700 DEG C for 950 DEG C of strip through cooling facility for laminar flow after hot rolling, then it is sent to cutter through pinch roll and enters
The excision of row strip end to end；
（6）Strip coiling
Strip after excision end to end is sent to coiling machine through pinch roll and carries out strip coiling, obtains finished product thin strip steel coil.
Embodiment 2
A kind of thickness 1.5mm, the super-purity ferrite stainless steel strip product of steel grade 445 casting and rolling production process, comprise the following steps：
（1）The qualified molten steel of composition is hoisted to bale panoramic tables：Super-purity ferrite stainless steel after LF ladle refining furnaces are refined
Molten steel is hoisted to bale panoramic tables, calm 20min；
（2）Molten steel is injected into tundish：Tundish blowing argon gas 15min is driven out of molten steel in bag after air by long nozzle from ladle
It is injected into tundish, the degree of superheat is controlled at 40 DEG C；Added above molten steel for being incubated and adsorbing the tundish covering flux being mingled with；
（3）Double-roller rolling：Molten steel is injected into twin-roll cast-rolling mill by submersed nozzle, and strand speed is 100m/min, casting
It is 2.5mm that roller, which presets roll gap,.Protected during MOLTEN STEEL FLOW using the mixed gas of argon gas and hydrogen, wherein argon gas and hydrogen
The volume ratio of gas is 3: 1, protective gas pressure 0.5MPa, and the made-up belt thickness obtained after casting is 2.5mm.Molten steel is in Casting Roller
In process of setting, cooldown rate is 750 DEG C/s；
（4）Made-up belt hot rolling：Roll casting sheet is in the mixed gas protected lower carry out hot rolling of argon gas and hydrogen, wherein argon gas and hydrogen
Volume ratio is 3: 1, protective gas pressure 0.5MPa, and made-up belt is sent to hot-rolling mill through pinch roll and carries out constant-tension rolling, mill speed
167 m/min, 1100 DEG C of made-up belt hot-rolled temperature, belt steel thickness is 1.5mm after made-up belt hot rolling；
（5）The cooling and excision of strip are end to end
When temperature is cooled to 680 DEG C for 910 DEG C of strip through cooling facility for laminar flow after hot rolling, then it is sent to cutter through pinch roll and enters
The excision of row strip end to end；
（6）Strip coiling
Strip after excision end to end is sent to coiling machine through pinch roll and carries out strip coiling, obtains finished product thin strip steel coil.
Embodiment 3
A kind of thickness 2.5mm, the super-purity ferrite stainless steel strip product of steel grade 443 casting and rolling production process, comprise the following steps：
（1）The qualified molten steel of composition is hoisted to bale panoramic tables：Super-purity ferrite stainless steel after LF ladle refining furnaces are refined
Molten steel is hoisted to bale panoramic tables, calm 15min；
（2）Molten steel is injected into tundish：Tundish blowing argon gas 10min is driven out of molten steel in bag after air by long nozzle from ladle
It is injected into tundish, the degree of superheat is controlled at 20 DEG C；Added above molten steel for being incubated and adsorbing the tundish covering flux being mingled with；
（3）Double-roller rolling：Molten steel is injected in twin-roll cast-rolling mill by submersed nozzle, and strand speed is 80m/min, and Casting Roller is pre-
If roll gap is 4.0mm, protected during molten steel flow using argon gas, protective gas pressure 0.3MPa.Made-up belt after casting
Thickness is 4.0mm, and molten steel is in Casting Roller in process of setting, and cooldown rate is 500 DEG C/s；
（4）Made-up belt hot rolling：Roll casting sheet carries out hot rolling, protective gas pressure 0.3MPa under using argon gas protection.Made-up belt is through folder
Send roller to be sent to hot-rolling mill and carry out constant-tension rolling, the m/min of mill speed 128,1050 DEG C of made-up belt hot-rolled temperature, after made-up belt hot rolling
Belt steel thickness is 2.5mm；
（5）The cooling and excision of strip are end to end
When temperature is cooled to 650 DEG C for 900 DEG C of strip through cooling facility for laminar flow after hot rolling, then it is sent to cutter through pinch roll and enters
The excision of row strip end to end；
（6）Strip coiling
Strip after excision end to end is sent to coiling machine through pinch roll and carries out strip coiling, obtains finished product thin strip steel coil.
Claims (6)
1. a kind of super-purity ferrite stainless steel double roll strip casting rolling production process, it is characterised in that comprise the following steps that：
（1）The qualified molten steel of composition is hoisted to bale panoramic tables：Super-purity ferrite stainless steel after LF ladle refining furnaces are refined
Molten steel is hoisted to bale panoramic tables, calm 15-25min；
（2）Molten steel is injected into tundish：Tundish blowing argon gas 10-20min drive out of in bag after air by long nozzle by molten steel from
Ladle is injected into tundish, and degree of superheat control is added on 20 DEG C -40 DEG C, molten steel for being incubated and adsorbing the centre being mingled with
Covering agent；
（3）Double-roller rolling：Molten steel is injected in twin-roll cast-rolling mill by submersed nozzle, and strand speed is 80-150 m/min, casting
Roller gap is adjustable between 1.5-4.0mm, is carried out during MOLTEN STEEL FLOW using the mixed gas of argon gas or argon gas and hydrogen
Protection, molten steel is in Casting Roller in process of setting, and cooldown rate control range is 500-950 DEG C/s；
（4）Made-up belt hot rolling：Roll casting sheet is in the mixed gas protected lower carry out hot rolling of argon gas or argon gas and hydrogen, and made-up belt is through pinching
Roller is sent to hot-rolling mill and carries out constant-tension rolling, and mill speed is 128-280 m/min, and wherein made-up belt hot-rolled temperature control is
1050-1150 DEG C, belt steel thickness control range is 0.8-2.5mm after made-up belt hot rolling；
（5）The cooling and excision of strip are end to end
Strip cooling after hot rolling, is sent to cutter through pinch roll and carries out the excision of strip end to end；
（6）Strip coiling
Strip after excision end to end is sent to coiling machine through pinch roll and carries out strip coiling, obtains finished product thin strip steel coil.
2. a kind of super-purity ferrite stainless steel double roll strip casting rolling production process according to claim 1, it is characterised in that：
The step（3）Middle protective gas pressure is 0.3-0.5MPa.
3. a kind of super-purity ferrite stainless steel double roll strip casting rolling production process according to claim 2, it is characterised in that：
The step（3）The volume ratio of middle argon gas and hydrogen is 3: 1.
4. a kind of super-purity ferrite stainless steel double roll strip casting rolling production process according to claim 1, it is characterised in that：
The step（4）Middle protective gas pressure is 0.3-0.5MPa.
5. a kind of super-purity ferrite stainless steel double roll strip casting rolling production process according to claim 4, it is characterised in that：
The step（4）The volume ratio of middle argon gas and hydrogen is 3: 1.
6. a kind of super-purity ferrite stainless steel double roll strip casting rolling production process according to claim 3 or 5, its feature exists
In：The step（5）Strip after middle hot rolling is cooled to 650-700 DEG C through cooling facility for laminar flow.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710288312.0A CN107142364A (en) | 2017-04-27 | 2017-04-27 | A kind of super-purity ferrite stainless steel double roll strip casting rolling production process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710288312.0A CN107142364A (en) | 2017-04-27 | 2017-04-27 | A kind of super-purity ferrite stainless steel double roll strip casting rolling production process |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359909A (en) * | 2018-05-25 | 2018-08-03 | 江苏集萃冶金技术研究院有限公司 | High tough martensite steel method is prepared by thin-belt casting rolling and aging technique |
| CN109731914A (en) * | 2019-02-21 | 2019-05-10 | 江苏沙钢集团有限公司 | Rolling method for improving surface quality of double-roller continuous casting rolled strip |
| CN109731913A (en) * | 2019-02-21 | 2019-05-10 | 江苏沙钢集团有限公司 | Method for reducing rolling force of rolling mill of double-roller continuous casting production line |
| CN110842024A (en) * | 2019-10-25 | 2020-02-28 | 首钢京唐钢铁联合有限责任公司 | Method and device for shearing strip steel |
| CN110883101A (en) * | 2019-10-23 | 2020-03-17 | 首钢集团有限公司 | Method and device for controlling thickness of strip steel |
| CN110899644A (en) * | 2018-09-14 | 2020-03-24 | 宝山钢铁股份有限公司 | Production method of ultrathin hot rolled strip steel |
| CN111151584A (en) * | 2019-12-30 | 2020-05-15 | 江苏沙钢集团有限公司 | Novel hot box for producing high-surface-quality hot-rolled strip steel without online descaling |
| CN112934961A (en) * | 2021-02-24 | 2021-06-11 | 山西太钢不锈钢精密带钢有限公司 | Method for avoiding roller sticking defect on surface of precision strip steel raw material and application thereof |
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| CN1212189A (en) * | 1997-05-29 | 1999-03-31 | 于西纳公司 | Process for manufacturing thin strip of ferritic stainless steel, and thin strip thus obtained |
| US6588494B1 (en) * | 1999-03-05 | 2003-07-08 | Usinor | Method for continuous casting of highly ductile ferritic stainless steel strips between rolls, and resulting thin strips |
| CN1994600A (en) * | 2006-12-27 | 2007-07-11 | 东北大学 | Cast rolling method and equipment of isometric crystal ferrite stainless steel slab band |
| CN105714212A (en) * | 2014-12-22 | 2016-06-29 | Posco公司 | Twin-roll strip caster, method for manufacturing thin duplex stainless steel sheet using the same and thin duplex stainless steel sheet |
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| CN1212189A (en) * | 1997-05-29 | 1999-03-31 | 于西纳公司 | Process for manufacturing thin strip of ferritic stainless steel, and thin strip thus obtained |
| US6588494B1 (en) * | 1999-03-05 | 2003-07-08 | Usinor | Method for continuous casting of highly ductile ferritic stainless steel strips between rolls, and resulting thin strips |
| CN1994600A (en) * | 2006-12-27 | 2007-07-11 | 东北大学 | Cast rolling method and equipment of isometric crystal ferrite stainless steel slab band |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359909A (en) * | 2018-05-25 | 2018-08-03 | 江苏集萃冶金技术研究院有限公司 | High tough martensite steel method is prepared by thin-belt casting rolling and aging technique |
| CN110899644A (en) * | 2018-09-14 | 2020-03-24 | 宝山钢铁股份有限公司 | Production method of ultrathin hot rolled strip steel |
| CN109731914A (en) * | 2019-02-21 | 2019-05-10 | 江苏沙钢集团有限公司 | Rolling method for improving surface quality of double-roller continuous casting rolled strip |
| CN109731913A (en) * | 2019-02-21 | 2019-05-10 | 江苏沙钢集团有限公司 | Method for reducing rolling force of rolling mill of double-roller continuous casting production line |
| CN109731914B (en) * | 2019-02-21 | 2020-07-24 | 江苏沙钢集团有限公司 | Rolling method for improving surface quality of double-roller continuous casting rolled strip |
| CN109731913B (en) * | 2019-02-21 | 2020-07-24 | 江苏沙钢集团有限公司 | Method for reducing rolling force of rolling mill of double-roller continuous casting production line |
| WO2020169076A1 (en) * | 2019-02-21 | 2020-08-27 | 江苏沙钢集团有限公司 | Method for reducing rolling force of twin roll casting production line rolling mill |
| WO2020169078A1 (en) * | 2019-02-21 | 2020-08-27 | 江苏沙钢集团有限公司 | Rolling method for improving surface quality of double-roller continuous casting rolling strip |
| CN110883101A (en) * | 2019-10-23 | 2020-03-17 | 首钢集团有限公司 | Method and device for controlling thickness of strip steel |
| CN110842024A (en) * | 2019-10-25 | 2020-02-28 | 首钢京唐钢铁联合有限责任公司 | Method and device for shearing strip steel |
| CN111151584A (en) * | 2019-12-30 | 2020-05-15 | 江苏沙钢集团有限公司 | Novel hot box for producing high-surface-quality hot-rolled strip steel without online descaling |
| CN112934961A (en) * | 2021-02-24 | 2021-06-11 | 山西太钢不锈钢精密带钢有限公司 | Method for avoiding roller sticking defect on surface of precision strip steel raw material and application thereof |
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