CN107695113A - A kind of method for swinging cooling technique production think gauge bridge steel - Google Patents
A kind of method for swinging cooling technique production think gauge bridge steel Download PDFInfo
- Publication number
- CN107695113A CN107695113A CN201710822881.9A CN201710822881A CN107695113A CN 107695113 A CN107695113 A CN 107695113A CN 201710822881 A CN201710822881 A CN 201710822881A CN 107695113 A CN107695113 A CN 107695113A
- Authority
- CN
- China
- Prior art keywords
- acc
- steel
- steel plate
- collector
- water
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
-
- 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
A kind of method for swinging cooling technique production think gauge bridge steel, belongs to bridge steel production technical field.Collector flow is first set, open collector quantity and sets number of oscillations in ACC, number of oscillations is 3 or 5 times；Before treating that water cooling steel plate enters ACC water coolings area, switch to manual mode and input collector flow, 0.5~1m/s of setting roller table speed；After entering ACC water coolings area with steel plate, collector is opened successively along steel plate approach axis, it is cold that the offline heap in ACC water coolings area is gone out after number of oscillations to be done.Advantage is that it is possible to give full play to the water cooling ability of ACC equipment, can extend the length in water cooling area by being swung in water cooling roller channel, and the water-cooling process requirement below current TMCP states bridge steel 120mm specifications can be achieved.
Description
Technical field
It is more particularly to a kind of to swing cooling technique production think gauge bridge steel the invention belongs to bridge steel production technical field
Method.More particularly to a kind of method for swinging cooling technique production 80~120mm think gauge TMCP state bridge steels, it is specific to utilize
Steel plate swings the production method for increase the water cooling time, realizing think gauge TMCP state steel plates in ACC cooled regions.
Background technology
Currently, both at home and abroad in newly-built large-scale over strait, cross a river non-major P.E.subject, this large-scale iron structure is led to it to be held
Power part has higher requirement, shows as think gauge, high intensity, high tenacity and anti-lamellar tearing performance.The steel addressed that need
Plate, the technique of conventionally employed normalizing, ensure that the mechanical property of steel plate meets the specification with higher carbon content and carbon equivalent
It is required that but normalizing composition design deteriorates its weldability.With the development of steel production technology, TMCP technique productions of new generation
Bridge steel there is high intensity, high tenacity and good weldability so that TMCP techniques gradually substitute normalizing process to turn into bridge
The preferred condition of delivery of joist steel.
During using TMCP technique productions think gauge high-strength bridge steels, desired organization type is bainite, to protect
Demonstrate,prove the intensity and toughness of steel plate.When the steel plate compared with think gauge carries out water cooling, cold temperature eventually need to be cooled to according to certain cooling velocity
For degree to obtain preferable organization type, this requires the ability that its water cooling equipment has water cooling more lasting.Realize lasting
Its water cooling equipment of water cooling function has enough length, transformation and upgrade is carried out to existing weaponry and equipment to increase water cooling section length, at present
Also only have Shoudu Iron and Steel Co and Anshan iron and steel plant carries out transformation to ACC equipment and adds UFC, be completed for majority on cut deal enterprise rolling line all not
Water cooling equipment is transformed.Therefore, how using with maximumlly play existing water cooling equipment realize TMCP technique productions thickness
Specification steel plate has larger realistic meaning.
The content of the invention
It is an object of the invention to provide a kind of method for swinging cooling technique production think gauge bridge steel, solves steel mill
Existing weaponry and equipment produces the hypodynamic problem of 80~120mm think gauge TMCP state bridge water cold energy.Fully sent out using ACC pendulum steel modes
Water cooling equipment ability is waved, realizes the production of TMCP technique think gauge bridge steels.
A kind of method for swinging cooling technique production think gauge bridge steel, to the steel using the rolling of two benches controlled rolling process
Plate, swing of the steel plate in ACC water coolings region is realized using the rotating of water cooling area roller-way, to provide longer water cooling section length
To realize the purpose of lasting water cooling.Specific steps and parameter are as follows：
The 1st, collector flow is set, open collector quantity and set number of oscillations in ACC：
(1) ACC collectors flow is configured according to water cooling speed, and for 80~120mm steel plates, its collector flow set is
The maximum that equipment allows, the present invention relates to the pole pipe flow set of ACC equipment, upper header flow is 600L/m2* min, next part
Pipe flow is 1800L/m2*min；
(2) ACC collectors quantity is at least：Steel plate length and the ratio+2 of single group header length, to leave certain pendulum
Dynamic distance；
(3) number of oscillations wherein in ACC, its principle are according to conservation of energy principle, steel plate temperature drop heat and the interior coolings of ACC
It is equal that water takes away heat, with reference to field condition, for opening cold temperature as 760 ± 20 DEG C, final cooling temperature be 380 ± 20 DEG C 80~
120mm bridge steel, 80≤steel plate thickness≤100mm pendulum steel number is 3 times, 100 ＜ steel plate thickness≤120mm pendulum steel
Number is 5 times；
2nd, before treating that water cooling steel plate enters ACC water coolings area, switch to manual mode and input collector flow, set roller table speed
0.5~1m/s；
3rd, after entering ACC water coolings area with steel plate, collector is opened successively along steel plate approach axis, visual surveillance area treats steel plate
After position reaches the front end collector opened, roller-way is inverted, it is again that roller-way is anti-after reaching caudal end collector after plate tail position
Turn；It is cold to go out the offline heap in ACC water coolings area after number of oscillations to be done.
The advantage of the invention is that：
1st, compared with the non-swing cooling technique of tradition, the water cooling ability of ACC equipment can be given full play to, by water cooling
The length in water cooling area can be extended by being swung in roller-way, and the water-cooling process that can be achieved below current TMCP states bridge steel 120mm specifications will
Ask；
2nd, compared with the non-time cooling technique that swings of tradition, can be reduced using swing cooling technique in ACC and ACC surfaces temperature
The difference of red rear surface temperature is spent and returned, realizes the accurate control of final cooling temperature；
3rd, led under the non-swing cooling technique of tradition to ensure that final cooling temperature (red temperature) often applies strong water cooling to slab
Uneven microstructure on its section of slab is caused, prolonged lasting cooling can be realized using cooling technique is swung in ACC, so that
Its thickness x cross sectional even tissue, so as to improve the performance uniformity on thickness x cross sectional.
Brief description of the drawings
Fig. 1 is 115mm370MPa levels bridge steel through putting steel type of cooling lower steel plate metallographic structure in ACC.
Fig. 2 is 120mm345MPa levels bridge steel through putting steel type of cooling lower steel plate metallographic structure in ACC.
Embodiment
Embodiment 1
115mm370MPa levels bridge steel in water cooling using type of cooling progress is swung in ACC, specifically explain by its production method
State as follows.The steel grade is designed using low-carbon Nb, V, Ti microalloying ingredient, is handled through molten iron, converter, LF refining, continuous casting are
400mm continuous casting billets.After the fully heating of heated 1200 DEG C of stove, using two-phase control rolling technique, rough rolling step uses the big pressure of low speed
Under principle, treat that temperature thickness is 200mm, finish rolling start rolling temperature is 830 DEG C, be rolled to after target thickness enter to carry out putting steel in ACC it is cold
But.Cold temperature to be opened as 780 DEG C, roller table speed 0.5m/s, opens 10 groups of collectors altogether, upper header flow is 600 (L/m2*min), under
Collector flow is 1800 (L/m2*min), comes and goes 2.5 times and goes out ACC water coolings area after amounting to 80s, surface final cooling temperature is 370 DEG C, is surveyed
Its fixed red temperature is 490 DEG C, by cold more than 36 hours of offline heap, and 400 DEG C of destressings of thermally treated stove rapidly after cold rectify
After tempering, metallographic is detected as shown in figure 1, bridge Steel Properties are as shown in table 1 after testing.
Comparative example 1
115mm370MPa levels bridge steel is carried out in water cooling using the UFC+ACC linkage types of cooling, and its production method is specific
It is described below.The steel grade is designed using low-carbon Nb, V, Ti microalloying ingredient, is handled through molten iron, converter, LF refining, continuous casting are
400mm continuous casting billets.After the fully heating of heated 1200 DEG C of stove, using two-phase control rolling technique, rough rolling step uses the big pressure of low speed
Under principle, treat that temperature thickness is 200mm, finish rolling start rolling temperature is 830 DEG C, enters UFC+ACC linkage coolings after being rolled to target thickness.
Cold temperature is opened as 778 DEG C, roller table speed 0.5m/s, UFC open 9 groups of collectors altogether, and upper header flow is 220 (L/m2*min),
Lower collector pipe flow is 418 (L/m2*min), and ACC opens 15 groups of collectors altogether, and upper header flow is 600 (L/m2*min), lower collector pipe stream
Measure as 1680 (L/m2*min), measure 380 DEG C of surface temperature after going out ACC water coolings area, red temperature is 530 DEG C, after cold rectify
Cold more than 36 hours of rapid offline heap, and after the 400 DEG C of destressings tempering of thermally treated stove, after testing bridge steel mechanical property such as table
Shown in 1.
The mechanical property of the 115mm370MPa level bridge steel steel plates of table 1
Embodiment 2
120mm345MPa levels bridge steel in water cooling using type of cooling progress is swung in ACC, specifically explain by its production method
State as follows.The steel grade chemical composition using low-carbon NbTi microalloyings design, handled through molten iron, converter smelting, LF refining, company
Casting, by cold more than the 36h of the offline heap of continuous casting billet.After the fully heating of heated 1170 DEG C of stove, using two-phase control rolling technique, roughing rank
The principle of the big pressure of Duan Caiyong low speed, it is 160mm to treat temperature thickness, and finish rolling start rolling temperature is 815 DEG C, is entered after being rolled to target thickness
Carry out putting steel cooling in ACC.Cold temperature is opened as 750 DEG C, roller table speed 0.5m/s, opens 12 groups of collectors altogether, upper header flow is
600 (L/m2*min), lower collector pipe flow are 1800 (L/m2*min), come and go 2.5 times and go out ACC water coolings area after amounting to 96s, eventually cold temperature
Spend for 337 DEG C, red temperature is 431 DEG C, by cold more than 36 hours of offline heap, and 400 DEG C of thermally treated stove rapidly after cold rectify
After destressing tempering, detected by metallographic as shown in Fig. 2 mechanical property is as shown in table 2 after testing.
Mechanical properties of the 120mmQ345qD of table 2 through pendulum steel type of cooling lower steel plate in ACC
Claims (1)
- A kind of 1. method for swinging cooling technique production think gauge bridge steel, it is characterised in that specific steps and parameter are as follows：1) collector flow is set, open collector quantity and sets number of oscillations in ACC：1. ACC collectors flow is configured according to water cooling speed, permit for 80~120mm steel plates its collector flow sets for equipment Perhaps maximum, the upper header flow of ACC equipment is 600L/m2* min, lower collector pipe flow are 1800L/m2*min；2. ACC collector quantity is at least：Steel plate length and the ratio+2 of single group header length, to leave swinging distance；3. number of oscillations wherein in ACC, its principle is the cooling water band in steel plate temperature drop heat and ACC according to conservation of energy principle It is equal to walk heat, for opening cold temperature as 760 ± 20 DEG C, final cooling temperature is 380 ± 20 DEG C of 80~120mm bridge steel, 80 ≤ steel plate thickness≤100mm pendulum steel number is 3 times, and 100 ＜ steel plate thickness≤120mm pendulum steel number is 5 times；2) before treating that water cooling steel plate enters ACC water coolings area, switch to manual mode and input collector flow, setting roller table speed 0.5~ 1m/s；3) after entering ACC water coolings area with steel plate, collector is opened successively along steel plate approach axis, visual surveillance area treats steel plate position After reaching the front end collector opened, roller-way is inverted, after reaching caudal end collector after plate tail position, again inverted roller-way； It is cold to go out the offline heap in ACC water coolings area after number of oscillations to be done.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822881.9A CN107695113B (en) | 2017-09-13 | 2017-09-13 | A method of it swinging cooling technique and produces think gauge bridge steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822881.9A CN107695113B (en) | 2017-09-13 | 2017-09-13 | A method of it swinging cooling technique and produces think gauge bridge steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107695113A true CN107695113A (en) | 2018-02-16 |
| CN107695113B CN107695113B (en) | 2019-02-22 |
Family
ID=61172398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710822881.9A Active CN107695113B (en) | 2017-09-13 | 2017-09-13 | A method of it swinging cooling technique and produces think gauge bridge steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107695113B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008100256A (en) * | 2006-10-19 | 2008-05-01 | Jfe Steel Kk | Equipment and method for cooling steel sheet |
| CN101642780A (en) * | 2009-06-05 | 2010-02-10 | 中冶赛迪工程技术股份有限公司 | Intermediate blank cooling system and cooling control technology |
| CN102294366A (en) * | 2010-06-23 | 2011-12-28 | 宝山钢铁股份有限公司 | Dynamic control method for online cooling control system of medium-thickness steel plate |
| CN102513384A (en) * | 2011-12-09 | 2012-06-27 | 东北大学 | Method for cooling intermediate billet of medium-thickness plate by using equipment for cooling after rolling |
| CN103752626A (en) * | 2013-12-30 | 2014-04-30 | 秦皇岛首秦金属材料有限公司 | Producing method for improving steel plate surface quality by utilizing ACC semi-automatic water cooling |
-
2017
- 2017-09-13 CN CN201710822881.9A patent/CN107695113B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008100256A (en) * | 2006-10-19 | 2008-05-01 | Jfe Steel Kk | Equipment and method for cooling steel sheet |
| CN101642780A (en) * | 2009-06-05 | 2010-02-10 | 中冶赛迪工程技术股份有限公司 | Intermediate blank cooling system and cooling control technology |
| CN102294366A (en) * | 2010-06-23 | 2011-12-28 | 宝山钢铁股份有限公司 | Dynamic control method for online cooling control system of medium-thickness steel plate |
| CN102513384A (en) * | 2011-12-09 | 2012-06-27 | 东北大学 | Method for cooling intermediate billet of medium-thickness plate by using equipment for cooling after rolling |
| CN103752626A (en) * | 2013-12-30 | 2014-04-30 | 秦皇岛首秦金属材料有限公司 | Producing method for improving steel plate surface quality by utilizing ACC semi-automatic water cooling |
Non-Patent Citations (1)
| Title |
|---|
| 张田: "中厚板轧后先进冷却工艺技术的研究与应用", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107695113B (en) | 2019-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103243275B (en) | Preparation method of bainite/martensite/austenite composite high-strength steel | |
| CN108728743B (en) | The good Marine Engineering Steel of low temperature fracture toughness and its manufacturing method | |
| CN101985725B (en) | 780MPa grade low yield ratio steel plate for buildings and manufacturing method thereof | |
| CN101831586A (en) | Low-carbon equivalent weight high-strength thick steel plate with excellent low-temperature toughness and manufacture method | |
| CN105369126B (en) | A kind of production method and finish rolling deformed bar of steel alloy and its finish rolling deformed bar | |
| CN104962814B (en) | Normalized extra-thick plate with high strength and toughness and thickness of 150mm and method for manufacturing normalized extra-thick plate | |
| CN105525209A (en) | Low-yield-ratio Q460GJ construction steel plate and production method thereof | |
| CN104372257A (en) | Low-alloy high-strength middle-thickness plate capable of utilizing self-tempering waste heat to improve toughness and preparation method of low-alloy high-strength middle-thickness plate | |
| CN105525210A (en) | Low-yield-ratio Q390GJ construction steel plate and production method thereof | |
| CN105603310B (en) | A kind of low yield strength ratio Q420GJ steel plate for building and its production method | |
| CN103643120A (en) | Manufacturing method of high-toughness hot-rolled plate coil for welded gas cylinder | |
| CN105886924A (en) | Low-alloy steel high in strength and toughness performance and preparing method of low-alloy steel | |
| CN107983771A (en) | The high-strength chill volume hot-rolling method of building concrete fixing piece | |
| CN106521358B (en) | A kind of production method of tensile strength 800MPa water power steel | |
| CN103667921B (en) | The uniform high-strong toughness Plate Steel of through-thickness performance and production method thereof | |
| CN109554622B (en) | Hot-rolled Fe-Mn-Al-C steel quenched to bainite region to obtain Q & P structure and manufacturing method thereof | |
| CN104018063A (en) | Low alloy and high strength Q420C medium steel plate and production method thereof | |
| CN102345043A (en) | Q370qE thick plate and its production method | |
| CN104372245A (en) | High-strength construction steel plate and production method thereof | |
| CN107695113A (en) | A kind of method for swinging cooling technique production think gauge bridge steel | |
| CN106676418A (en) | Atmosphere corrosion resisting profile steel liquid containing niobium and nitrogen, atmosphere corrosion resisting profile steel and production method of atmosphere corrosion resisting profile steel | |
| CN107630166A (en) | A kind of continuous casting billet production easily special thick bridge steel plate of welding and its production method | |
| CN106011647A (en) | 460MPa-level extra-thick plate and production method thereof | |
| CN104532127B (en) | Method for producing steel for pipe fittings and steel for pipe fittings | |
| CN104841694A (en) | Method for rolling high-strength bridge steel plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |