CN109092891A - The production method of 400Mpa grades of ultra-fine grain steel Ribbed Bar wire rods - Google Patents
The production method of 400Mpa grades of ultra-fine grain steel Ribbed Bar wire rods Download PDFInfo
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- CN109092891A CN109092891A CN201810763610.5A CN201810763610A CN109092891A CN 109092891 A CN109092891 A CN 109092891A CN 201810763610 A CN201810763610 A CN 201810763610A CN 109092891 A CN109092891 A CN 109092891A
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- steel
- pinch roller
- low temperature
- ultra
- fine grain
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 38
- 239000010959 steel Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000005096 rolling process Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 238000009987 spinning Methods 0.000 claims abstract description 10
- 230000032683 aging Effects 0.000 claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims abstract description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 8
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 4
- 239000010962 carbon steel Substances 0.000 abstract description 4
- 238000005272 metallurgy Methods 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229910001566 austenite Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/163—Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor
-
- 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
-
- 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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention relates to 400Mpa grades of ultra-fine grain steel Ribbed Bar Production method for wire rod of ordinary carbon steel that microelement (Nb, V, Ti, Mn) is not added in a kind of production of metallurgy industry.Specifically prepared using cooling+Low Temperature Finish+low temperature spinning+stelmo line air blast cooling+artificial aging technique between low temperature open rolling+mm finishing mill unit machine.Since steel technique is sent in the synchronous clamping of pinch roller before using Laying head, improve the power and stability of pinch roller before Laying head, therefore there are 400Mpa grades of ultra-fine grain steel Ribbed Bar wire rods of steady production in the case where not adding microalloy element (Nb, V, Ti, Mn)；Have the characteristics that crystal grain refinement is uniform, performance is stable with common process ratio, martensite-free tissue, meet anti-seismic steel bar requirement, energy saving, production cost is low.
Description
Technical field
The present invention relates to a kind of production methods of metallurgy industry 400Mpa grades of ultra-fine grain steels Ribbed Bar wire rod, specifically
Say it is to produce not add microelement (Nb, V, Ti, Mn), has that crystal grain refinement is uniform, performance is stable, martensite-free tissue, full
The features such as sufficient anti-seismic steel bar requires, is energy saving, production cost is low 400Mpa grades of ultra-fine grain steel Ribbed Bars of ordinary carbon steel
Production method for wire rod.
Background technique
Pinch roller is the key equipment of metallurgy industry high-speed wire production line before Laying head, it be responsible for by finished wire rod from
Milling train smoothly imports the critical function of Laying head.It is (anti-that the device is mainly used for small dimension tail brake when producing round steel wire
High speed whipping) and big specification pinch (being allowed to smooth discharge Laying head).
When producing Ribbed Bar wire rod under the conditions of high temperature (>=900 DEG C of laying temperatures) spinning, due to rolling, rear temperature drop is little, wears
Water is small, to wear, water resistance is small, and steady production may be implemented with conventional pinch technology (clamping force 1.0-4.5bar).But
When producing Ribbed Bar wire rod under low temperature (750 DEG C of laying temperatures of <) spinning process conditions, due to rolling, rear temperature drop is big, wears water
Greatly, to wear that water resistance is big, enough power cannot be provided with conventional pinch technology (clamping force 1.0-4.5bar), it is difficult to support
Disappear and wear water resistance, high velocity will appear frequent piling of steel, to also just cannot achieve normal production.Exactly above-mentioned reason, at present state
Inside and outside production Ribbed Bar wire rod is all made of the high temperature spinning technology higher than 690 DEG C of laying temperatures, this is resulted in: can not be with not adding
The ordinary carbon steel of any microalloy element (Nb, V, Ti, Mn) is added to produce the similar products such as 400Mpa grades of Ribbed Bar wire rods, only
Addition microalloy element (Nb, V, Ti, Mn) can be taken or increase the method for Si intensified element to improve intensity, to realize 400Mpa
The production of the high strength cast irons such as grade；And using addition microalloy element (Nb, V, Ti, Mn) or increase Si intensified element method come
The intensity for improving reinforcing bar, the cost for making production technology complexity, increasing reinforcing bar.
At abroad, the states such as America and Europe, which mainly use, rolls rear immediate quenching technique raising steel strength.The product of technique production
Compared with alloy strengthening product plasticity reduces, welding performance is poor, strong flexor ratio is not high.
In China, this kind of steel are mainly used for building, and due to the steel of immediate quenching technique production, welding performance is poor,
Can only be using mechanical connection when construction, and China be in earthquake and takes place frequently area, most of reinforcing bar is using welded connecting in engineering construction
Technique, therefore the product of immediate quenching technique production is difficult to promote and apply in China.
In construction projects, the rank of reinforcing bar is improved, can efficiently reducing the usage amount of reinforcing bar, (such as same architectural engineering makes
Usage amount with III grade of reinforcing bar than II grade of reinforcing bar reduces 12-15%), while reducing reinforcement welding, prefabricated and transport etc.
Workload is conducive to the mobility for improving concrete, working efficiency is improved, to be effectively reduced building cost.
Summary of the invention
The object of the present invention is to provide a kind of production method of 400Mpa grades of ultra-fine grain steel Ribbed Bar wire rod, it can be
In the case where not adding microalloy element (Nb, V, Ti, Mn), steel work is sent by the synchronous clamping of pinch roller before zerolling, spinning
400Mpa grades of steady production ordinary carbon steel of realization is ultra-fine under the process conditions of skill, stelmo line air blast cooling and artificial aging
The production method of crystal grain steel band rib reinforcement wire rod.
In order to achieve the above object, the technical solution adopted by the present invention is that: it is " cooling between low temperature open rolling+mm finishing mill unit machine+low
Steel+low temperature spinning+stelmo line air blast cooling+artificial aging is sent in the synchronous clamping of pinch roller before warm finish rolling+Laying head " technique
Method.
The operation of rolling uses low start rolling temperature, the low production technology into laying temperature cooling and low between finishing mill temperature, machine,
The heating temperature of reinforcing bar production drops to 900~1000 DEG C by 1000~1200 DEG C, and the rolling temperature in finish rolling area is by 950-1050 DEG C
It is down to 750-900 DEG C, laying temperature is controlled at 730-750 DEG C, and under this process condition, austenite is realized within a short period of time
Homogenization, austenite grain are not also roughened, ensure that the uniform refinement of reinforcing bar crystal grain.
Steel technique is sent using the synchronous clamping of pinch roller before spinning in high velocity.Pass through optimization pass, torque amplitude limit value, idle running shape
State bottom pinch roll overstepping coefficient is transformed pinch roller gas source by adding booster pump, makes the clamp pressure of pinch roller by before
1.0-4.5bar is promoted to 5.0-7.0bar, is solved and is produced band in the case where low temperature (750 DEG C of laying temperatures of <) spin process conditions
Water resistance is big due to wearing when rib reinforcement wire rod, cannot be provided with conventional pinch technology (clamping force 1.0-4.5bar) enough dynamic
The problem of power, the frequent piling of steel in high velocity can not be produced normally.
Stelmo line air blast cooling+artificial aging technique is used after spinning.Stelmo line blower is opened after spinning
5-8 platform, opening degree 50%-100% are kept the temperature by insulation cover after air blast cooling and carry out artificial aging, not only further refinement
Crystal grain, stabilizes performance, and eliminate the abnormal structure during zerolling.
Therefore, the present invention is super with that can produce 400Mpa grades in the case where not adding microalloy element (Nb, V, Ti, Mn)
Fine-grained steel Ribbed Bar wire rod, have crystal grain refinement is uniform, performance is stable, it is martensite-free tissue, meet anti-seismic steel bar
It is required that, it is energy saving, production cost is low the features such as, compared with the case where adding microalloy element (Nb, V, Ti, Mn), reinforcing bar bend
It is not obviously lowered to take the indexs such as intensity, tensile strength, but has obviously saved raw material cost, reduces bloom production cost.
Specific embodiment
It is by using low start rolling temperature, it is low into it is cooling between finishing mill temperature, machine, spin before the synchronous clamping of pinch roller give
Steel, low laying temperature, stelmo line air blast cooling and artificial aging technique, do not add microalloy element (Nb, V, Ti, Mn)
In the case where, produce qualified 400Mpa grade ultra-fine grain steel Ribbed Bar wire rod.
RB400Mpa grades of embodiment one, rolling H Ф 6mm ultra-fine grain steel Ribbed Bar wire rods:
Selecting chemical component is the steel billet of C0.21-0.25%, Si0.10-0.30%, P≤0.045%, S≤0.045%；
900-1000 DEG C of start rolling temperature, into 750-850 DEG C of finishing mill temperature, laying temperature control is at 730 DEG C, the admission pressure of pinch roller
It is adjusted to 7.0bar or more, the chucking power of pinch roller is adjusted to 5.0-7.0bar, and pinch roller torque clipping is adjusted to 50-65%, this is too
You rub blower open 5, blower aperture 2 × 100%+3 × 50%, close Stanermo wind-cooling linear on the 6th and later all
Insulation cover can produce HRB400Mpa grades of Ф 6mm ultra-fine grain steel Ribbed Bar wire rods.
RB400Mpa grades of embodiment two, rolling H Ф 8mm ultra-fine grain steel Ribbed Bar wire rods:
Selecting chemical component is the steel billet of C0.21-0.25%, Si0.10-0.30%, P≤0.045%, S≤0.045%；
900~1000 DEG C of start rolling temperature, into 750-850 DEG C of finishing mill temperature, laying temperature control is at 740 DEG C, the air inlet pressure of pinch roller
Power is adjusted to 7.0bar or more, and the chucking power of pinch roller is adjusted to 6.0-7.0bar, and pinch roller torque clipping is adjusted to 60-75%, this
Tai Ermo blower opens 5, and blower aperture 5 × 100% closes the 6th and later whole insulation covers on Stanermo wind-cooling linear,
HRB400Mpa grades of Ф 8mm ultra-fine grain steel Ribbed Bar wire rods can be produced.
RB400Mpa grades of embodiment three, rolling H Ф 12mm ultra-fine grain steel Ribbed Bar wire rods:
Selecting chemical component is the steel billet of C0.21-0.25%, Si0.10-0.30%, P≤0.045%, S≤0.045%；
900-1000 DEG C of start rolling temperature, into 750-850 DEG C of finishing mill temperature, laying temperature control is at 750 DEG C, the admission pressure of pinch roller
It is adjusted to 7.0bar or more, the chucking power of pinch roller is adjusted to 6.0-7.0bar, and pinch roller torque clipping is adjusted to 55-65%, this is too
You open 8 at the blower that rubs, blower aperture 8 × 100%, close on Stanermo wind-cooling linear the 9th and later whole insulation covers, just
HRB400Mpa grades of Ф 12mm ultra-fine grain steel Ribbed Bar wire rods can be produced.
Therefore the present invention forces cooling by low start rolling temperature, low rolling temperature, low laying temperature and stelmor
With artificial aging technique, energy consumption is significantly reduced, has saved the energy；Second is that the coarse grains of austenite recrystallization can be prevented,
The crystal grain of product is set more to refine, is more uniform, to achieve the purpose that improve product strength.Therefore, have can be by the present invention
In the case where not adding microalloy element (Nb, V, Ti, Mn), 400Mpa grades of ultra-fine grain steel Ribbed Bar wire rods are produced, are had
The spies such as crystal grain refinement is uniform, performance is stable, martensite-free tissue, meet anti-seismic steel bar requirement, is energy saving, production cost is low
Point, yield strength reach as high as 600MPa, tensile strength 750Mpa, and elongation is up to 35%.
Above-mentioned specific embodiment cannot function as limiting the scope of the invention, for the technology people of the art
For member, any alternate modification or transformation made to embodiment of the present invention are fallen within the scope of protection of the present invention.This
Place is not described in detail for invention, is the well-known technique of those skilled in the art of the present technique.
Claims (1)
1. a kind of production method of 400Mpa grades of ultra-fine grain steel Ribbed Bar wire rod, it is characterized in that: chemical component is selected to contain for C
≤ 0.25%, Si content≤0.30%, P≤0.045%, S≤0.045% is measured, does not add any Nb, V, Ti, Mn microalloy member
The steel billet of element is as raw material, using " pinch roller is synchronous before cooling+Low Temperature Finish+Laying head between low temperature open rolling+mm finishing mill unit machine presss from both sides
Hold and send steel+low temperature spinning+stelmo line air blast cooling+artificial aging " technique production, the start rolling temperature of the low temperature open rolling is
900-1000 DEG C, into 750-850 DEG C of finishing mill temperature, laying temperature is controlled at 730-750 DEG C, and the admission pressure of pinch roller is adjusted to
7.0bar or more, the chucking power of pinch roller are adjusted to 5.0-7.0bar, and pinch roller torque clipping is adjusted to 50-65%, stelmor
Blower opens 5-8 platform, and every Fans air inlet aperture is 50%-100%, and different apertures, steyr may be selected in every Fans
The insulation cover after air blast cooling that rubs is closed, and artificial heat insulation timeliness is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810763610.5A CN109092891B (en) | 2018-07-12 | 2018-07-12 | Production method of 400Mpa grade superfine crystal grain steel ribbed steel bar wire rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810763610.5A CN109092891B (en) | 2018-07-12 | 2018-07-12 | Production method of 400Mpa grade superfine crystal grain steel ribbed steel bar wire rod |
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| Publication Number | Publication Date |
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| CN109092891A true CN109092891A (en) | 2018-12-28 |
| CN109092891B CN109092891B (en) | 2020-01-03 |
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| CN201810763610.5A Active CN109092891B (en) | 2018-07-12 | 2018-07-12 | Production method of 400Mpa grade superfine crystal grain steel ribbed steel bar wire rod |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110885952A (en) * | 2019-12-16 | 2020-03-17 | 本钢板材股份有限公司 | 400 MPa-grade hot-rolled ribbed steel bar and preparation method thereof |
| CN111394560A (en) * | 2020-03-31 | 2020-07-10 | 湖南华菱湘潭钢铁有限公司 | Production method of hot-rolled ribbed steel bar |
| CN111485087A (en) * | 2020-05-18 | 2020-08-04 | 南京钢铁股份有限公司 | Preparation method of 10.9-grade SCM435 non-quenched and tempered bolt steel |
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| CN1745918A (en) * | 2004-09-07 | 2006-03-15 | 安阳钢铁集团有限责任公司 | Production of ultra-fine crystal hot-rolled ribbed reinforcing rob |
| CN101015839A (en) * | 2007-02-14 | 2007-08-15 | 山东石横特钢集团有限公司 | Laying head front nip and feed technique for producing wire roll with high speed under low temperature |
| CN101185938A (en) * | 2006-11-09 | 2008-05-28 | 钢铁研究总院 | Method for producing steel bar with rib |
| CN104561731A (en) * | 2014-12-28 | 2015-04-29 | 首钢总公司 | Production method of high-tenacity 65Mn spring steel with uniform whole wire rod property |
| CN106282778A (en) * | 2016-09-19 | 2017-01-04 | 山东石横特钢集团有限公司 | Ultra-fine grain steel Ribbed Bar wire rod and production technology thereof |
-
2018
- 2018-07-12 CN CN201810763610.5A patent/CN109092891B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1745918A (en) * | 2004-09-07 | 2006-03-15 | 安阳钢铁集团有限责任公司 | Production of ultra-fine crystal hot-rolled ribbed reinforcing rob |
| CN101185938A (en) * | 2006-11-09 | 2008-05-28 | 钢铁研究总院 | Method for producing steel bar with rib |
| CN101015839A (en) * | 2007-02-14 | 2007-08-15 | 山东石横特钢集团有限公司 | Laying head front nip and feed technique for producing wire roll with high speed under low temperature |
| CN104561731A (en) * | 2014-12-28 | 2015-04-29 | 首钢总公司 | Production method of high-tenacity 65Mn spring steel with uniform whole wire rod property |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110885952A (en) * | 2019-12-16 | 2020-03-17 | 本钢板材股份有限公司 | 400 MPa-grade hot-rolled ribbed steel bar and preparation method thereof |
| CN111394560A (en) * | 2020-03-31 | 2020-07-10 | 湖南华菱湘潭钢铁有限公司 | Production method of hot-rolled ribbed steel bar |
| CN111485087A (en) * | 2020-05-18 | 2020-08-04 | 南京钢铁股份有限公司 | Preparation method of 10.9-grade SCM435 non-quenched and tempered bolt steel |
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| Publication number | Publication date |
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| CN109092891B (en) | 2020-01-03 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20181228 Assignee: XINJIANG KUNYU STEEL Co.,Ltd. Assignor: SHIHENG SPECIAL STEEL GROUP Co.,Ltd. Contract record no.: X2021980014561 Denomination of invention: Production method of 400MPa ultra-fine grain steel belt rib reinforcement wire rod Granted publication date: 20200103 License type: Common License Record date: 20211210 |
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Denomination of invention: The production method of 400Mpa grade ultra-fine grain steel ribbed steel wire rod Effective date of registration: 20231222 Granted publication date: 20200103 Pledgee: Industrial and Commercial Bank of China Limited Feicheng sub branch Pledgor: SHIHENG SPECIAL STEEL GROUP Co.,Ltd. Registration number: Y2023980073806 |
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