CN205851555U - A kind of production system of low yield strength ratio hot-rolled high-strength anti-seismic steel bar - Google Patents
A kind of production system of low yield strength ratio hot-rolled high-strength anti-seismic steel bar Download PDFInfo
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- CN205851555U CN205851555U CN201620817059.4U CN201620817059U CN205851555U CN 205851555 U CN205851555 U CN 205851555U CN 201620817059 U CN201620817059 U CN 201620817059U CN 205851555 U CN205851555 U CN 205851555U
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Abstract
This utility model provides the production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar, including the heating furnace set gradually by rolling direction, roughing mills, crop flying shear, intermediate mill, in roll between rear water cooling plant, crop flying shear, mm finishing mill unit leading portion, finish rolling water cooling plant, Double Dimension Flying Shears and cold bed after water cooling plant, mm finishing mill unit back segment, finish rolling, water tank is arranged between mm finishing mill unit, ferrite recrystallization district can be realized roll by controlling water-cooled parameter and reply section, organize after fining austenite grains and phase transformation, improve spiral intensity.
Description
Technical field
This utility model belongs to Ferrous Metallurgy hot rolling technique field, is specifically related to a kind of low yield strength ratio hot-rolled high-strength antidetonation
The production system of reinforcing bar.
Background technology
Along with developing rapidly of building trade, large-scale basis facility and Urbanization Construction need a large amount of building irons, special
Being not Ribbed Bar, therefore the application amount of Ribbed Bar is increasing.To large-scale tall buildings and large span public building, preferentially
Use 500MPa level reinforcing bar, improve production and the application percentage of 500MPa level reinforcing bar year by year；Carry out the application of 600MPa level reinforcing bar
Technical research.For earthquake prone areas, emphasis application high yield ratio, the high-strength quake-proof reinforcing steel bar that uniform elongation is high.
In the prior art, the method producing spiral mainly includes following several:
(1) crystal grain refinement
Refined the performance improving material by crystal grain, such as, can pass through austenite recrystallization softening austenite group repeatedly
Knit, and then obtain tiny microscopic structure by phase transformation, or by strain-induced transformation, crystal grain thinning, make reinforcing bar obtain good
Good combination property.Patent application CN101185938A and Australian Patent 9419292.9 all can pass through strain inducing phase
Becoming and obtain fine-grained steel, but the product yield tensile ratio manufactured by patent 9419292.9 is the highest, lacks practicality, and how for
In sheet material.CN101185938A has a problem in that blank heating temperature is relatively low, and roughing temperature is relatively low, considerably increases machine utilization,
Reduce the service life of the equipment such as milling train, shearing machine.Use air-cooled line that reinforcing bar is coiled to cool down, limited by capacity of equipment
System, cooling effectiveness is the highest.
Patent application " a kind of hot rolled ribbed bars Production method for wire rod " (CN102643970A) proposes a kind of hot-rolled strip
Rib reinforcement Production method for wire rod, principal security laying temperature 800 DEG C～1100 DEG C, dissipate the cooling with >=8m/s of the air-cooled section of leading portion of volume
Speed is quickly cooled to target temperature range 590 DEG C ± 30 DEG C；In time dissipating volume stage casing, by the cooling speed of hot rolled ribbed bars wire rod
Degree control be 0.2 DEG C/s～1.4 DEG C/s, control hot rolled ribbed bars wire rod scattered volume air-cooled line stage casing cool time >=
120s；Hot rolled ribbed bars wire rod, through dissipating volume air-cooled line latter end, controls rate of cooling >=3 of hot rolled ribbed bars wire rod
DEG C/s, the collection volume temperature simultaneously controlling hot rolled ribbed bars wire rod is not less than 300 DEG C.It has a problem in that laying temperature is the highest, brilliant
Grain is grown up when high temperature, is easily formed mixed crystal phenomenon.
Patent application " manufacture method of ultra-fine crystal hot-rolled ribbed wire roll " (CN1745918A) proposes a kind of ultra-fine
The manufacture method of crystal hot-rolled ribbed wire roll, rolling heating-up temperature 980 DEG C～1100 DEG C, start rolling temperature 930 DEG C～980 DEG C,
Laying temperature 860 DEG C～890 DEG C, uses Stanermo wind-cooling linear to control cooling after rolling, the speed with 4 DEG C/s～5 DEG C/s is quick
It is cooled to phase transition temperature, then air cooling.This kind of production technology laying temperature is higher, controls cooling segment intensity of cooling relatively low, difficult to understand
The degree of supercooling of family name's body is less than normal, it is impossible to give full play to control the strengthening effect of cooling.
(2) microalloying and controlled rolling and controlled cooling
By adding microalloy element in steel, such as Nb, V, Ti etc., by the solution strengthening of alloying element, second mutually strong
Change and the effect such as inhibiting grain growth improve the V adding about 0.05% in intensity, such as 20Si2Mn, by controlled rolling and
Controlling cooling can make its yield strength be brought up to more than 400MPa by 335MPa.But it is due to microalloy element to be increased, former
Expecting relatively costly, the alloying element reserves such as domestic V, Nb are not enough, later stage import to be relied on；Owing to adding alloying element, melt down
After, containing a large amount of alloys in molten steel, secondary uses rolling quality unstable.Separation alloy technology is immature, and separation costs is high.
(3) immediate quenching
Under austenitic state, directly carry out surface hardening after utilizing reinforcing bar finish to gauge, spread out of waste heat by heart portion subsequently and carry out certainly
Tempering, to improve intensity, improves plasticity and toughness, makes reinforcing bar obtain good comprehensive mechanical property.The product obtained by this technique
Product tissue is generally tempered martensite+tempered sorbite+ferrite+pearlite, although product mechanical property is higher, but stress
Corrosion cracking tendency is relatively big, and strong flexor ratio is relatively low, and anti-seismic performance is poor, and welding performance is poor, and construction adaptability is relatively poor.
Summary of the invention
The deficiencies in the prior art in view of the above, the purpose of this utility model is to provide a kind of low yield strength ratio hot rolling high
The production system of intensity anti-seismic steel bar, improves reinforced steel bar strength.
For achieving the above object and other relevant purposes, the technical solution of the utility model is as follows:
The production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar, including the heating set gradually by rolling direction
Stove, roughing mills, intermediate mill, in roll water cooling plant after rear water cooling plant, mm finishing mill unit, finish rolling, Double Dimension Flying Shears and cold bed, institute
State mm finishing mill unit and include mm finishing mill unit leading portion and mm finishing mill unit back segment, set between described mm finishing mill unit leading portion and mm finishing mill unit back segment
It is equipped with water cooling plant between finish rolling.
Between mm finishing mill unit, arrange water tank, realize ferrite recrystallization district roll by controlling water-cooled parameter and reply section,
Organize after fining austenite grains and phase transformation, improve spiral intensity.
Further, described cold bed is provided with thermal insulation cover.Rolled piece head and tail temperature difference can be reduced, improve cooling uniformity, and then
Improve tissue and performance uniformity, improve lumber recovery.
Further, between described roughing mills and intermediate mill and in roll between rear water cooling plant and mm finishing mill unit leading portion
It is respectively arranged with crop flying shear.
Further, described mm finishing mill unit leading portion uses two passes, and mm finishing mill unit back segment uses four-pass rolling.
Further, described mm finishing mill unit leading portion includes that two rolling mills, previous frame are horizontal mill, and a rear frame is vertical rolling
Machine.
Further, described mm finishing mill unit back segment includes that 4 rolling mills, 4 rolling mills are Ping-Li-Ping-vertical layout；Or 4 rolling mills
It is horizontal mill.
Further, after rolling rear water cooling plant and finish rolling in described, water cooling plant all includes two groups of water tanks.
Further, described intermediate mill includes 6 rolling mills, in Ping-Li-Ping-Li-Ping-and vertical layout.
As it has been described above, the beneficial effects of the utility model are: arrange water tank between mm finishing mill unit leading portion and section, by control
Controlling the water circulation is cold and reply section realizes the rolling of ferrite recrystallization district, organizes, improve spiral after fining austenite grains and phase transformation
Intensity.
Accompanying drawing explanation
Fig. 1 is the horizontal layout schematic diagram of this utility model production system；
Fig. 2 is intermediate mill to the arrangement schematic diagram of mm finishing mill unit.
Piece mark illustrates:
1 heating furnace；2 roughing mills；3 crop flying shears；4 intermediate mills；Rear water cooling plant is rolled in 5；6 cut
Head flying shear；7 mm finishing mill unit leading portions；Water cooling plant between 8 finish rolling；9 mm finishing mill unit back segments；Water cooling plant after 10 finish rolling；
11 Double Dimension Flying Shears；12 thermal insulation covers；13 cold beds；Pinch roll-14.
Detailed description of the invention
By particular specific embodiment, embodiment of the present utility model being described below, those skilled in the art can be by this
Content disclosed by description understands other advantages of the present utility model and effect easily.
Embodiment
As depicted in figs. 1 and 2, the production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar, including by rolling side
To the heating furnace 1 set gradually, roughing mills 2, crop flying shear 3, intermediate mill 4, in roll rear water cooling plant 5, crop flying shear 6,
Water cooling plant 10, Double Dimension Flying Shears 11 and cold bed after water cooling plant 8, mm finishing mill unit back segment 9, finish rolling between mm finishing mill unit leading portion 7, finish rolling
13, wherein water cooling plant all uses water tank, arranges water tank between mm finishing mill unit leading portion 7 and mm finishing mill unit back segment 9, by controlling
Water-cooled parameter and reply section realize the rolling of ferrite recrystallization district, organize, improve screw-thread steel after fining austenite grains and phase transformation
Rigidity of soft tissues degree.
Further, cold bed 13 is provided above thermal insulation cover 12, it is possible to decrease rolled piece head and tail temperature difference, improves cooling uniformity,
And then improve tissue and performance uniformity, improve lumber recovery.Wherein, intermediate mill 4 includes 6 rolling mills, is followed successively by horizontal mill
With vertical mill, in Ping-Li-Ping-Li-Ping-vertical arrange.Mm finishing mill unit leading portion 7 includes that two rolling mills, previous frame are that level is rolled
Machine, a rear frame is vertical mill.Mm finishing mill unit back segment 9 includes that 4 rolling mills, 4 rolling mills are followed successively by horizontal mill and vertical mill,
In Ping-Li-Ping-vertical layout；According to splitting rolling, then 4 rolling mills are horizontal mill.The rolling of finish rolling leading portion uses two passages
Rolling, precision rolling rear rolling uses four-pass rolling, to improve production efficiency.In roll water-cooled dress after rear water cooling plant 5 and finish rolling
Put 10 and all include two groups of water tanks, after finish rolling, between two groups of water tanks of water cooling plant 10, be provided with pinch roll 14.
The concrete operation of employing said system is:
Heating steps use walking beam heating furnace 1 by heating steel billet to 950 DEG C～1100 DEG C；Rough rolling of steel billets and in roll
Temperature controls at 920 DEG C～1000 DEG C, and the lengthening coefficient controlling every time in the operation of rolling is 1.15～1.45；Roughing and in roll
Rear rolled piece is through flying shear crop；Rolled piece rolls rear water-cooled, makes rolled piece reduce by 100 DEG C～250 DEG C；The purpose of this section of Water cooling is essence
Really control final rolling temperature scope in Ae3～Ar3；Finish rolling leading portion rolls, before finishing mill two frame inlet temperatures control 750～
850℃；Using two passages to be rolled into, by this stage rolling, rolled piece deforms upon rapidly induction ferrite transformation；Then rolled piece
Entering precision rolling rear rolling after water-cooled between finish rolling, after mm finishing mill unit, four rack inlet temperature control, at 700～850 DEG C, to roll
Part rolls at two-phase section, it is thus achieved that ultra-fine grained ferrite tissue；Rolled piece enters Water cooling immediately, it is ensured that rolled piece is in this temperature range
Interior quickly cooling, rate of cooling >=10 DEG C/s, be cooled to 500 DEG C～600 DEG C, and temperature controls, in the range of ± 30 DEG C, then to roll
Part Double Dimension Flying Shears enters cold bed after shearing and carries out Slow cooling, in order to ensure rolled piece generation pearlite and bainite transformation, cold
Adding thermal insulation cover, then cold bed under rolled piece above Chuan, scale is also collected.
Production system described in the utility model, its product microscopic structure is deformation induced ferrite ferrite+pearlite+shellfish
Family name's body, is fine grain or ultra-fine grain, and crystallite dimension is less than 5 μm, has higher intensity and plasticity and toughness, owing to tissue comprises
The soft or hard of ferrite+bainite combines, and therefore tissue has relatively low yield tensile ratio, as produced normal carbon Ribbed Bar, its
Yield strength is at more than 500MPa, and tensile strength is at more than 650MPa, and elongation percentage is more than 20%, and clod wash, anti-clod wash are entirely capable of
Meet GB1499.2-2007 standard, there is good plasticity and toughness, weldability and anti-seismic performance.
The Ribbed Bar produced is carried by deformation-induced ferrite transformation, recrystallization ferrite transformation and phase transformation strengthening
High reinforced steel bar strength, decreases the addition of alloy, reduces production cost further, improve economic benefit；The band rib steel produced
Muscle not only excellent performance, and stable performance, even tissue is fine and closely woven, and yield tensile ratio is low, and anti-seismic performance is good, has the saving energy and ring
The advantage protected.
Any person skilled in the art all can be under spirit and the scope of the present utility model, to above-described embodiment
Modify or change.Therefore, art has usually intellectual such as without departing from disclosed in this utility model
Spirit and technological thought under all equivalences of being completed modify or change, must be contained by claim of the present utility model
Lid.
Claims (8)
1. a production system for low yield strength ratio hot-rolled high-strength anti-seismic steel bar, including the heating set gradually by rolling direction
Stove, roughing mills, intermediate mill, in roll water cooling plant after rear water cooling plant, mm finishing mill unit, finish rolling, Double Dimension Flying Shears and cold bed, its
It is characterised by: described mm finishing mill unit includes mm finishing mill unit leading portion and mm finishing mill unit back segment, described mm finishing mill unit leading portion and finishing mill
It is provided with water cooling plant between finish rolling between group back segment.
The production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar the most according to claim 1, it is characterised in that:
It is provided with thermal insulation cover on described cold bed.
The production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar the most according to claim 1, it is characterised in that:
Between described roughing mills and intermediate mill and in roll and be respectively arranged with crop between rear water cooling plant and mm finishing mill unit leading portion
Flying shear.
The production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar the most according to claim 1, it is characterised in that:
Described mm finishing mill unit leading portion uses two passes, and mm finishing mill unit back segment uses four-pass rolling.
The production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar the most according to claim 4, it is characterised in that:
Described mm finishing mill unit leading portion includes that two rolling mills, previous frame are horizontal mill, and a rear frame is vertical mill.
The production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar the most according to claim 4, it is characterised in that:
Described mm finishing mill unit back segment includes that 4 rolling mills, 4 rolling mills are Ping-Li-Ping-vertical layout；Or 4 rolling mill be horizontal mill.
The production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar the most according to claim 1, it is characterised in that:
After rolling rear water cooling plant and finish rolling in described, water cooling plant all includes two groups of water tanks.
The production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar the most according to claim 1, it is characterised in that:
Described intermediate mill includes 6 rolling mills, in Ping-Li-Ping-Li-Ping-and vertical layout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620817059.4U CN205851555U (en) | 2016-07-29 | 2016-07-29 | A kind of production system of low yield strength ratio hot-rolled high-strength anti-seismic steel bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620817059.4U CN205851555U (en) | 2016-07-29 | 2016-07-29 | A kind of production system of low yield strength ratio hot-rolled high-strength anti-seismic steel bar |
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| Publication Number | Publication Date |
|---|---|
| CN205851555U true CN205851555U (en) | 2017-01-04 |
Family
ID=57654160
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620817059.4U Expired - Fee Related CN205851555U (en) | 2016-07-29 | 2016-07-29 | A kind of production system of low yield strength ratio hot-rolled high-strength anti-seismic steel bar |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077085A (en) * | 2016-07-29 | 2016-11-09 | 中冶赛迪工程技术股份有限公司 | The production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar and method |
| CN108913995A (en) * | 2018-07-10 | 2018-11-30 | 陕钢集团汉中钢铁有限责任公司 | A kind of HRB600E high-strength anti-seismic steel bar and its production method |
| CN108941195A (en) * | 2018-09-30 | 2018-12-07 | 四川德胜集团钒钛有限公司 | A kind of high strength cast iron rolls the milling method of rear step cooling |
| CN110125176A (en) * | 2019-06-24 | 2019-08-16 | 新余钢铁股份有限公司 | Separated time cooling device after base cutting among a kind of hot rolled ribbed bars |
| CN110170523A (en) * | 2019-05-20 | 2019-08-27 | 北京科技大学 | A kind of low energy consumption controlled rolling method of hot rolled ribbed bars |
| CN113814281A (en) * | 2021-09-03 | 2021-12-21 | 广西钢铁集团有限公司 | Cost-reducing segmented cooling control method for hot-rolled ribbed steel bar |
-
2016
- 2016-07-29 CN CN201620817059.4U patent/CN205851555U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077085A (en) * | 2016-07-29 | 2016-11-09 | 中冶赛迪工程技术股份有限公司 | The production system of a kind of low yield strength ratio hot-rolled high-strength anti-seismic steel bar and method |
| CN106077085B (en) * | 2016-07-29 | 2018-05-25 | 中冶赛迪工程技术股份有限公司 | A kind of production system and method for low yield strength ratio hot-rolled high-strength anti-seismic steel bar |
| CN108913995A (en) * | 2018-07-10 | 2018-11-30 | 陕钢集团汉中钢铁有限责任公司 | A kind of HRB600E high-strength anti-seismic steel bar and its production method |
| CN108941195A (en) * | 2018-09-30 | 2018-12-07 | 四川德胜集团钒钛有限公司 | A kind of high strength cast iron rolls the milling method of rear step cooling |
| CN110170523A (en) * | 2019-05-20 | 2019-08-27 | 北京科技大学 | A kind of low energy consumption controlled rolling method of hot rolled ribbed bars |
| CN110125176A (en) * | 2019-06-24 | 2019-08-16 | 新余钢铁股份有限公司 | Separated time cooling device after base cutting among a kind of hot rolled ribbed bars |
| CN110125176B (en) * | 2019-06-24 | 2024-02-09 | 新余钢铁股份有限公司 | Branching cooling device for intermediate billet split of hot rolled ribbed steel bar |
| CN113814281A (en) * | 2021-09-03 | 2021-12-21 | 广西钢铁集团有限公司 | Cost-reducing segmented cooling control method for hot-rolled ribbed steel bar |
| CN113814281B (en) * | 2021-09-03 | 2024-02-06 | 广西钢铁集团有限公司 | Cost-reducing sectional cooling control method for hot rolled ribbed steel bar |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20180729 |