CN101347792A - Technique for medium thin slab continuous rolling and producing Nb-microalloying steel and devcie - Google Patents
Technique for medium thin slab continuous rolling and producing Nb-microalloying steel and devcie Download PDFInfo
- Publication number
- CN101347792A CN101347792A CNA2008100793277A CN200810079327A CN101347792A CN 101347792 A CN101347792 A CN 101347792A CN A2008100793277 A CNA2008100793277 A CN A2008100793277A CN 200810079327 A CN200810079327 A CN 200810079327A CN 101347792 A CN101347792 A CN 101347792A
- Authority
- CN
- China
- Prior art keywords
- water
- cooled
- temperature
- intermediate blank
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention provides a process method used for producing Nb micro-alloying steel by a continuous rolling method of middle sheet bar and a device thereof, belonging to the technical field of metallurgy steel rolling; the process method of the invention is used for solving the problems of technical process and temperature continuity during the rolling process of the Nb micro-alloying steel; the process method comprises the steps as follows: rough rolling, reducing the temperature of a breakdown bar by water cooling, temperature equilibrium, finish rolling, coiling, etc. The invention also provides a device which realizes the method of the invention. The process method carries out precise temperature control on the breakdown bar by arranging a water cooling section, and causes the temperature of the breakdown bar to achieve suitable temperature requirement, thus realizing no-recrystallization rolling during the stage of the finish rolling. The process method of the invention optimizes the no-recrystallization rolling process of the Nb micro-alloying steel, improves the quality of the product and sufficiently plays the role of the Nb in the micro-alloying steel. The Nb micro-alloying steel produced according to the method of the invention ensures the normal production rhythm of the large production and effectively avoids the mixed crystal phenomenon in the finished product at the same time; the technical indexes of the mechanical property and processing property of the product completely comply with corresponding technical requirements.
Description
Technical field
The present invention relates to a kind of steel rolling process method and device, particularly on the medium thin slab continuous rolling production line, pass through the controlled rolling and controlled cooling technology, realize the rolling process of Nb-microalloying steel grade non-recrystallization is belonged to metallurgical technical field of steel rolling.
Background technology
The Nb-microalloying steel grade mainly is to utilize the high temperature of niobium in austenite to separate out behavior (about 960 ℃), improve crystallization final temperature again, thereby realize that non-recrystallization is rolling, make austenite that crystallization more not take place in deformation process, accumulate deformation energy on the one hand, increase the ferrite transformation driving force; Improve the deformation band of deformed austenite on the other hand, more ferrite nucleation site is provided, finally reach structure refinement, improve the purpose of steel combination property.The controlled rolling of Nb-microalloying steel grade is the grain structure by the refinement final products, reaches the steel mechanics performance of raising and the purpose of processing performance.These characteristics at the niobium element, its specification requirement is: improve the roughing start rolling temperature 1., make niobium fully solid solution in continuous casting billet, rough rolling step just makes the austenite grain size refinement of intermediate blank by the original austenite grains of austenite recrystallization refinement strand.2. the finish rolling of corresponding reduction intermediate blank begins temperature (separating out temperature less than niobium in steel), make intermediate blank in the finish rolling stage austenite recrystallization not take place, thereby the austenite non-recrystallization of realizing the finish rolling district is rolling.To sum up, the controlled rolling technology of Nb-microalloying steel can be summarized as high temperature roughing, low temperature finish rolling, therefore the problem that exists a temperature to be connected in rolling process.
The production status of medium thin slab continuous rolling production line Nb-microalloying steel grade has three kinds of modes at present: 1. reduce final rolling temperature by reducing start rolling temperature, satisfy the rolling requirement to final rolling temperature of Nb-microalloying steel grade non-recrystallization.The shortcoming of this way is that start rolling temperature is low, causes the niobium solid solution fully in the continuous casting billet, and the effect of niobium can not be given full play to, and the product mechanical property is low.2. guarantee the roughing temperature, make niobium solid solution fully in continuous casting billet, so just improved the roughing temperature, advance final rolling temperature but also improved intermediate blank simultaneously.The shortcoming of this way is the final rolling temperature height, and niobium can not be separated out fully in the finish rolling district, causes the finish rolling process that part crystallization again takes place, make finished product produce mixed crystal, or crystallization again takes place in the finish rolling process, and the thin brilliant effect of niobium in the controlled rolling process weakened, reduce the mechanical property of product.3. improve the roughing start rolling temperature, guarantee niobium solid solution fully in continuous casting billet, on delay table, stop, carry out the air cooling cooling by intermediate blank, satisfy Nb-microalloying steel the finish rolling district temperature requirement, realize that non-recrystallization is rolling.The shortcoming of this way is that intermediate blank time of staying on the roller-way after the roughing is longer, causes austenite crystal to grow up, and has a strong impact on the rolling rhythm of rolling process simultaneously, reduces operating rate.This technology pattern heavy and medium plate mill can adopt, but for the tropical rolling unit, can accomplish during the small lot test, and is infeasible in big the production.
Comprehensive above three kinds of modes as can be seen, the production of Nb-microalloying exploitation at present exists because niobium solid solution fully, does not at high temperature have the niobium of solid solution just not exist in the later process and does not separate out, and can not play a role, therefore the problem that causes niobium to waste.In addition, because of properties of product can not be protected, the final qualification rate of steel is reduced
Summary of the invention
Technical problem to be solved by this invention provides a kind of process and device that is used for medium thin slab rolling production Nb-microalloying steel, this method and device increase the water-cooled section by between, finish rolling thick at the medium thin slab production line, intermediate blank is carried out precise dose control, thereby satisfy the technological requirement of the roughing of Nb-microalloying steel grade high temperature, low temperature finish rolling.
The alleged problem of the present invention is solved by following technical scheme:
A kind of process that is used for medium thin slab rolling production Nb-microalloying steel, its special feature is: it comprises the steps:
A. roughing: slab heating temperature is 1150～1200 ℃, enters the roughing mill roughing;
B. intermediate blank water-cooled cooling: through the intermediate blank of roughing via water-cooled section water-cooled cooling to 930～960 ℃;
C. samming: cooled intermediate blank enters the Coil Box samming;
D. finish rolling: the intermediate blank through samming enters finishing mill finish rolling, and finishing temperature is 800～840 ℃;
E. batch: according to properties of product and specification control coiling temperature is 550～630 ℃.
The above-mentioned process that is used for medium thin slab rolling production Nb-microalloying steel, in the described intermediate blank water-cooled cooling step, intermediate blank cooling under the water nozzle spray of water-cooled section, its speed of service is 3～5 meter per seconds, cooling water total flow 4250～4400m
3/ h is positioned at the water nozzle hydraulic pressure 0.082～0.085Mpa on intermediate blank top, the water nozzle hydraulic pressure 0.046～0.050MPa of bottom.
The above-mentioned process that is used for medium thin slab rolling production Nb-microalloying steel, the chemical composition of described Nb-microalloying steel are C%:0.03～0.12; Mn%:0.60～1.60; Si%:0.10～0.40; S% :≤0.015; P% :≤0.020; Nb%:0.01～0.08; Als%:0.010～0.035; Ti% :≤0.03; V% :≤0.05; All the other are iron.
The above-mentioned device that is used for medium thin slab rolling production Nb-microalloying steel, comprise the roughing mill that sets gradually in the formation, Coil Box, mm finishing mill unit, special feature is: set up the water-cooled section, described water-cooled section is arranged between roughing mill and the Coil Box, water-cooled section formation comprises water-cooled section inlet temperature measurer, water-cooled section outlet temperature measurer, controller, water tank, force (forcing) pump and being arranged on the water-cooled section intermediate blank run location, the collector pipe of downside, water tank connected set water pipe, force (forcing) pump is on the connecting line between water tank and the collector pipe, uniform nozzle on the collector pipe, described water-cooled section inlet temperature measurer, the temperature measurement signal of water-cooled section outlet temperature measurer transfers to controller, controller is according to the temperature signal that is received and the intermediate blank speed by cooling section, intermediate blank thickness, control cooling section confluent.
The above-mentioned device that is used for medium thin slab rolling production Nb-microalloying steel, described water-cooled segment length L is 35～36m, width 1.5m, and water-cooled Duan Yousi segmentation formed, and the upper and lower collector pipe of each segmentation respectively is 10 rows, and every water drainage and collection pipe is provided with 40 water nozzles.
The above-mentioned device that is used for medium thin slab rolling production Nb-microalloying steel, described water tank, force (forcing) pump and upside collector pipe all are set in place the liftable water spray crossbeam place in water-cooled section top, and liftable water spray crossbeam is by Driven by Hydraulic Cylinder.
The present invention is directed to the medium thin slab continuous rolling production line and produce the technical problem that temperature is connected in the Nb-microalloying steel grade operation of rolling, a kind of new technical matters method and apparatus is provided, it passes through at medium thin slab production line roughing mill, the water-cooled section is set in the middle of the finishing mill, to the intermediate blank cooling of spraying water, and utilize the high temperature temperature measurer that intermediate blank is carried out temperature survey, adjust the confluent of nozzle up and down of water cooling plant by the time of water-cooled section by feedback signal and intermediate blank, intermediate blank is carried out precise dose control, make the intermediate blank temperature reach suitable temperature requirement, thereby realize that in the finish rolling stage non-recrystallization is rolling.The present invention has optimized the non-recrystallization rolling mill practice of Nb-microalloying steel, has improved the quality of product, has given full play to the effect of niobium in the microalloying steel grade.Produce Nb-microalloying steel according to the inventive method and can effectively avoid finished product the phenomenon of mixed crystal to occur when guaranteeing big production ordinary production rhythm, its product mechanical property satisfies relevant specification requirement fully with the processing performance technical indicator.
Description of drawings
Fig. 1 is apparatus of the present invention schematic diagrames;
Fig. 2 is water-cooled section collector pipe and water nozzle distribution schematic diagram.
Label is expressed as follows in the accompanying drawing: 1. roughing mill; 2. water-cooled section inlet temperature measurer; 3. liftable water spray crossbeam; 4. water tank; 5. controller; 6. force (forcing) pump; 7. the water-cooled section exports temperature measurer; 8. Coil Box; 9. mm finishing mill unit; 10. water-cooled section; Four segmentations of 10-1,10-2,10-3,10-4. water-cooled section; 11. collector pipe; 12. water nozzle.
The specific embodiment
The present invention is for solving the problem of the roughing of steel billet requirement high temperature, low temperature finish rolling in the Nb-microalloying steel controlled rolling process, between thick, finish rolling, cooling section is set, when temperature is accurately controlled in realizing rolling process, guarantee operating rate and normal rolling rhythm, better realize controlled rolling for the medium thin slab production line efficient temperature control device is provided.
Referring to Fig. 1, the formation of apparatus of the present invention comprises roughing mill 1, water-cooled section 10, Coil Box 8, the mm finishing mill unit 9 that sets gradually.The roughing unit carries out roughing to the high temperature strand, by austenite crystallization refinement high temperature microstructure more repeatedly.Water-cooled section inlet temperature measurer 2 is set, intermediate blank temperature before this temperature measurer monitoring water-cooled in water-cooled section porch.Water-cooled section outlet temperature measurer 7 is set, intermediate blank temperature after this temperature measurer monitoring water-cooled in water-cooled section exit.The temperature measurement signal of above-mentioned two temperature measurers transfers to controller 5, and controller is according to the temperature signal that is received and intermediate blank speed, the intermediate blank thickness by cooling section, control cooling section confluent.Cooled intermediate blank is carried out Coil Box 8 and is carried out samming, and the intermediate blank behind the samming enters mm finishing mill unit 9 and carries out the non-recrystallization controlled rolling.
Referring to Fig. 1, Fig. 2, the water-cooled section is arranged on the roller-way between roughing mill and the Coil Box, water-cooled segment length L is 35～36m, width 1.5m, water-cooled Duan Yousi segmentation 10-1,10-2,10-3,10-4 form, each segmentation is provided with collector pipe 11 in the upper and lower side of intermediate blank run location, water tank 4 connected set water pipes, force (forcing) pump 6 on the connecting line between water tank and the collector pipe, uniform nozzle 12 on the collector pipe.The upper and lower collector pipe of each segmentation respectively is 10 rows, and every water drainage and collection pipe is provided with 40 water nozzles.Control valve is installed at the collector pipe place, and control valve can be controlled pneumatic cabinet by controller 5 output signals, pneumatic cabinet control control valve, thereby the control of realization water spray.Water tank, force (forcing) pump and upside collector pipe all are set in place liftable water spray crossbeam 3 places in water-cooled section top, and liftable water spray crossbeam is by Driven by Hydraulic Cylinder.
The present invention utilizes the technical process of the rolling Nb microalloying of said apparatus steel grade as follows:
The chemical composition scope of Nb microalloying steel grade is: C%:0.03～0.12; Mn%:0.60～1.60; Si%:0.10～0.40; S% :≤0.015; P% :≤0.020; Nb%:0.01～0.08; Als%:0.010～0.035; Ti% :≤0.03; V% :≤0.05; All the other are iron.
Slab heating temperature is controlled at 1150～1200 ℃, guarantees the crystallization again of austenite rough rolling step, and refine austenite crystal grain guarantees that simultaneously niobium still is in complete solid solution condition after roughing is finished.
The cooling under the water nozzle spray of water-cooled section of intermediate blank after the roughing, its speed of service is 3～5 meter per seconds, the water nozzle hydraulic pressure that the water nozzle hydraulic pressure that is positioned at intermediate blank top is controlled at 0.082～0.085Mpa, bottom is controlled at 0.046～0.050MPa, 30～35 ℃ of cooling water water temperatures, total flow are 4250～4400m
3/ h, the water yield is regulated and is finished by controller, control procedure is as follows: behind water-cooled section inlet temperature measurer, carry out temperature detection, feedback signal is to controller, setting cooling back intermediate blank temperature is 930～960 ℃, and controller is according to speed and the intermediate blank thickness of intermediate blank by cooling section, determines that the cooling section confluent cools off.Water-cooled section outlet temperature measurer carries out temperature detection to cooled intermediate blank, feed back signal to controller, if temperature is in the design temperature scope, then normally carry out by this cooling water inflow, otherwise send the control water yield signal cooling water is finely tuned, export the temperature measurer detected temperatures in the design temperature scope until the water-cooled section so repeatedly by controller.
Carry out Coil Box through the intermediate blank after the water-cooled and carry out samming, the intermediate blank behind the samming enters mm finishing mill unit and carries out the non-recrystallization controlled rolling, and the intermediate blank inlet temperature that enters mm finishing mill unit is usually than low 5～10 ℃ of the temperature behind the water-cooled cooling.Determine that according to product final thickness specification finishing temperature is at 800～840 ℃; Product cools off after the finish rolling, requires and thickness specification difference according to different performance, and the control coiling temperature is at 550～630 ℃.
Below provide several specific embodiments:
Embodiment 1: rolling 6.0mm thickness Nb-microalloying steel, and chemical composition is as follows: C%:0.06; Mn%:1.00; Si%:0.20; S% :≤0.015; P% :≤0.020; Nb%:0.04; Als%:0.02; Ti% :≤0.03; V% :≤0.05; All the other are iron.Slab heating temperature is 1170 ℃, enters the roughing mill roughing; Intermediate blank after the roughing enters water-cooled section cooling, and intermediate blank 40mm is thick, and the speed of service is 4 meter per seconds, and the water nozzle hydraulic pressure that the water nozzle hydraulic pressure that is positioned at intermediate blank top is controlled at 0.083Mpa, bottom is controlled at 0.048MPa, and 30 ℃ of cooling water water temperatures, total flow are 4350m
3/ h, intermediate blank is via water-cooled section water-cooled spraying cooling to 940 ℃; Cooled intermediate blank enters the Coil Box samming; Intermediate blank through samming enters finishing mill finish rolling, and its finishing mill inlet temperature is 935 ℃, and finishing temperature is 820 ℃; Coiling temperature is 580 ℃.
Embodiment 2: rolling 3.5mm Nb-microalloying steel, and chemical composition is as follows: C%:0.03; Mn%:1.60; Si%:0.4; S% :≤0.015; P% :≤0.020; Nb%:0.08; Als%:0.035; Ti% :≤0.03; V% :≤0.05; All the other are iron.Slab heating temperature is 1200 ℃, enters the roughing mill roughing; Intermediate blank after the roughing enters the cooling of water-cooled section, intermediate blank 35mm is thick, and the intermediate blank speed of service is 5 meter per seconds, and the water nozzle hydraulic pressure that the water nozzle hydraulic pressure that is positioned at intermediate blank top is controlled at 0.082Mpa, bottom is controlled at 0.046MPa, 35 ℃ of cooling water water temperatures, total flow are 4250m
3/ h, intermediate blank is via water-cooled section water-cooled spraying cooling to 960 ℃; Cooled intermediate blank enters the Coil Box samming; Intermediate blank through samming enters finishing mill finish rolling, and its finishing mill inlet temperature is 950 ℃, and finishing temperature is 840 ℃; Coiling temperature is 630 ℃.
Embodiment 3: rolling 9.75mm Nb-microalloying steel, and chemical composition is as follows: C%:0.12; Mn%:0.60; Si%:0.10; S% :≤0.015; P% :≤0.01; Nb%:0.01; Als%:0.010; Ti% :≤0.03; V% :≤0.05; All the other are iron.Slab heating temperature is 1150 ℃, enters the roughing mill roughing; Intermediate blank after the roughing enters the cooling of water-cooled section, intermediate blank 40mm is thick, and the intermediate blank speed of service is 3 meter per seconds, and the water nozzle hydraulic pressure that the water nozzle hydraulic pressure that is positioned at intermediate blank top is controlled at 0.085Mpa, bottom is controlled at 0.050MPa, 32 ℃ of cooling water water temperatures, total flow are 4400m
3/ h, intermediate blank is via water-cooled section water-cooled spraying cooling to 930 ℃; Cooled intermediate blank enters the Coil Box samming; Intermediate blank through samming enters finishing mill finish rolling, and its finishing mill inlet temperature is 922 ℃, and finishing temperature is 800 ℃; Coiling temperature is 550 ℃.
Claims (6)
1. process that is used for medium thin slab rolling production Nb-microalloying steel, it is characterized in that: it comprises the steps:
A. roughing: slab heating temperature is 1150～1200 ℃, enters the roughing mill roughing;
B. intermediate blank water-cooled cooling: through the intermediate blank of roughing via water-cooled section water-cooled cooling to 930～960 ℃;
C. samming: cooled intermediate blank enters the Coil Box samming;
D. finish rolling: the intermediate blank through samming enters finishing mill finish rolling, and finishing temperature is 800～840 ℃;
E. batch: according to properties of product and specification control coiling temperature is 550～630 ℃.
2. the process that is used for medium thin slab rolling production Nb-microalloying steel according to claim 1, it is characterized in that: in the described intermediate blank water-cooled cooling step, intermediate blank cooling under the water nozzle spray of water-cooled section, its speed of service is 3～5 meter per seconds, cooling water total flow 4250～4400m
3/ h is positioned at the water nozzle hydraulic pressure 0.082～0.085Mpa on intermediate blank top, the water nozzle hydraulic pressure 0.046～0.050MPa of bottom.
3. the process that is used for medium thin slab rolling production Nb-microalloying steel according to claim 2 is characterized in that: the chemical composition of described Nb-microalloying steel is C%:0.03～0.12; Mn%:0.60～1.60; Si%:0.10～0.40; S% :≤0.015; P% :≤0.020; Nb%:0.01～0.08; Als%:0.010～0.035; Ti% :≤0.03; V% :≤0.05; All the other are iron.
4. device that is used for medium thin slab rolling production Nb-microalloying steel, comprise the roughing mill that sets gradually in the formation, Coil Box, mm finishing mill unit, it is characterized in that: set up water-cooled section (10), described water-cooled section is arranged between roughing mill (1) and the Coil Box (8), water-cooled section formation comprises water-cooled section inlet temperature measurer (2), water-cooled section outlet temperature measurer (7), controller (5), water tank (4), force (forcing) pump (6) and being arranged on the water-cooled section intermediate blank run location, the collector pipe of downside (11), water tank connected set water pipe, force (forcing) pump is on the connecting line between water tank and the collector pipe, uniform nozzle (12) on the collector pipe, described water-cooled section inlet temperature measurer, the temperature measurement signal of water-cooled section outlet temperature measurer transfers to controller, controller is according to the temperature signal that is received and the intermediate blank speed by cooling section, intermediate blank thickness, control cooling section confluent.
5. the device that is used for medium thin slab rolling production Nb-microalloying steel according to claim 4, it is characterized in that: described water-cooled segment length L is 35～36m, width 1.5m, water-cooled Duan Yousi segmentation (10-1,10-2,10-3,10-4) formed, the upper and lower collector pipe of each segmentation (11) respectively is 10 rows, and every water drainage and collection pipe is provided with 40 water nozzles (12).
6. according to claim 4 or the 5 described devices that are used for medium thin slab rolling production Nb-microalloying steel, it is characterized in that: described water tank, force (forcing) pump and upside collector pipe all are set in place in the liftable water spray crossbeam (3) on water-cooled section top and locate, and liftable water spray crossbeam is by Driven by Hydraulic Cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100793277A CN101347792B (en) | 2008-09-04 | 2008-09-04 | Technique for medium thin slab continuous rolling and producing Nb-microalloying steel and devcie |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100793277A CN101347792B (en) | 2008-09-04 | 2008-09-04 | Technique for medium thin slab continuous rolling and producing Nb-microalloying steel and devcie |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101347792A true CN101347792A (en) | 2009-01-21 |
| CN101347792B CN101347792B (en) | 2011-02-09 |
Family
ID=40266853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100793277A Expired - Fee Related CN101347792B (en) | 2008-09-04 | 2008-09-04 | Technique for medium thin slab continuous rolling and producing Nb-microalloying steel and devcie |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101347792B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560260A (en) * | 2012-02-01 | 2012-07-11 | 河北钢铁股份有限公司邯郸分公司 | Low cost, high strength and toughness X 70 pipeline steel coil plate and its production method |
| CN102952999A (en) * | 2011-08-19 | 2013-03-06 | 鞍钢股份有限公司 | Nuclear power station low-pressure heater steel and its making method |
| CN103937949A (en) * | 2014-03-19 | 2014-07-23 | 唐山国丰钢铁有限公司 | Fast cooling process for hot rolled narrow strip |
| CN107649522A (en) * | 2017-10-31 | 2018-02-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Surface quality of hot rolled steel coils control method |
| CN113201694A (en) * | 2021-04-09 | 2021-08-03 | 唐山钢铁集团有限责任公司 | Production method of cold-rolled low-carbon steel with high corrosion resistance |
| CN113828643A (en) * | 2020-06-23 | 2021-12-24 | 上海梅山钢铁股份有限公司 | Temperature control method for rolling strip steel in ferrite area |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100482841C (en) * | 2007-01-25 | 2009-04-29 | 鞍钢股份有限公司 | Pipeline steel and its ingredient control method |
| CN100523253C (en) * | 2007-05-10 | 2009-08-05 | 武汉科技大学 | Soldering low alloy steel plate in high intensity by large line energy, and manufacturing method |
-
2008
- 2008-09-04 CN CN2008100793277A patent/CN101347792B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102952999A (en) * | 2011-08-19 | 2013-03-06 | 鞍钢股份有限公司 | Nuclear power station low-pressure heater steel and its making method |
| CN102560260A (en) * | 2012-02-01 | 2012-07-11 | 河北钢铁股份有限公司邯郸分公司 | Low cost, high strength and toughness X 70 pipeline steel coil plate and its production method |
| CN103937949A (en) * | 2014-03-19 | 2014-07-23 | 唐山国丰钢铁有限公司 | Fast cooling process for hot rolled narrow strip |
| CN103937949B (en) * | 2014-03-19 | 2016-01-20 | 唐山国丰钢铁有限公司 | The quick process for cooling of mill coil |
| CN107649522A (en) * | 2017-10-31 | 2018-02-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Surface quality of hot rolled steel coils control method |
| CN113828643A (en) * | 2020-06-23 | 2021-12-24 | 上海梅山钢铁股份有限公司 | Temperature control method for rolling strip steel in ferrite area |
| CN113201694A (en) * | 2021-04-09 | 2021-08-03 | 唐山钢铁集团有限责任公司 | Production method of cold-rolled low-carbon steel with high corrosion resistance |
| CN113201694B (en) * | 2021-04-09 | 2022-06-10 | 唐山钢铁集团有限责任公司 | Production method of cold-rolled low-carbon steel with high corrosion resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101347792B (en) | 2011-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101347792B (en) | Technique for medium thin slab continuous rolling and producing Nb-microalloying steel and devcie | |
| CN101678415B (en) | Process and plant for the production of metal strip | |
| CN101181718B (en) | Method for producing wide strip steel by bar strip continuous casting and rolling as well as system therefor | |
| CN101381806B (en) | Refrigerating device of belt steel and cooling and controlling method thereof | |
| US9863015B2 (en) | Manufacturing method for strip casting 550 MPa-grade high strength atmospheric corrosion-resistant steel strip | |
| US9790566B2 (en) | Manufacturing method for strip casting 700 MPa-grade high strength atmospheric corrosion-resistant steel | |
| CN101391264B (en) | Technique method of thin middle plate continuous casting and rolling production | |
| US7909085B2 (en) | Process and plant for producing metal strip | |
| CN109465295B (en) | Method for preventing edge cracking and strip breakage of hot continuous rolled steel plate in cold rolling | |
| US20140366602A1 (en) | Method for Manufaturing Thin Strip Continuously Cast 700MPa-Grade High Strength Weather-Resistant Steel | |
| CN100540708C (en) | High strength ship hull structure use steel and coiled sheet production method thereof | |
| CN101585077B (en) | Cooling method for preventing microcracks on wheel steel continuous casting slabs | |
| CN102861890A (en) | Secondary cooling method for reducing transverse cracks of corners of microalloy sheet billet | |
| CN102319734B (en) | Method for effectively controlling small pockmark defects on surface of medium plate | |
| EP1870172A1 (en) | A continuous casting and rolling method for medium plate | |
| CN201291227Y (en) | Water cooling device for producing niobium micro-alloyed steel by tandem rolling middle thin slab | |
| CN103667648B (en) | Method and the microalloy tube blank steel of microalloy tube blank steel is manufactured in rolling casting bonding equipment | |
| CN101297049A (en) | Method for producing hot strip with a multiphase structure | |
| CN101518781A (en) | Millarray for producing ultra-fine crystal bar and milling method thereof | |
| CN105817594B (en) | Found curved segment cold control device and control method by force in micro-alloyed steel continuous casting slab corner | |
| CN101972782A (en) | Device and method for cooling intermediate rolled blank of hot rolled strip | |
| CN107130178A (en) | A kind of high-strength wheel steel of 500Mpa grades of automobile and its CSP technique productions methods | |
| CN102179407A (en) | Method for preparing hot rolling strip steel capable of preventing edge crack of extremely thin rolled strip steel | |
| CN112122360A (en) | Laminar cooling control method for thin hot continuous rolling strip steel | |
| CN103276286B (en) | Production method of X80 pipeline steel strip with thickness of 6-10 mm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: HEBEI IRON + STEEL CO.,LTD. Free format text: FORMER OWNER: TANGSHAN IRON AND STEEL CO., LTD. Effective date: 20100331 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 063016 INTELLECTUAL PROPERTY DIVISION, TANGSHAN STEEL TECHNOLOGY CENTER, NO.9, BINHE ROAD, TANGSHAN CITY, HEBEI PROVINCE TO: 050000 NO.40, YUHUA WEST ROAD, SHIJIAZHUANG CITY, HEBEI PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20100331 Address after: Yuhua city of Shijiazhuang province Hebei 050000 West Road No. 40 Applicant after: Hebei Iron & Steel Co., Ltd. Address before: 063016 Hebei province Tangshan City No. 9 Binhe Road, Tangshan Iron and steel technology center of Intellectual Property Department Applicant before: Tangshan Iron & Steel Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20110904 |