CN100435990C - After-roll reinforced cooling process for 82B wire rod steel strand - Google Patents
After-roll reinforced cooling process for 82B wire rod steel strand Download PDFInfo
- Publication number
- CN100435990C CN100435990C CNB2004101554519A CN200410155451A CN100435990C CN 100435990 C CN100435990 C CN 100435990C CN B2004101554519 A CNB2004101554519 A CN B2004101554519A CN 200410155451 A CN200410155451 A CN 200410155451A CN 100435990 C CN100435990 C CN 100435990C
- Authority
- CN
- China
- Prior art keywords
- cooling
- wire rod
- roller
- phase transformation
- speed
- 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.)
- Expired - Fee Related
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 13
- 239000010959 steel Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000008569 process Effects 0.000 title claims description 7
- 230000009466 transformation Effects 0.000 claims description 23
- 238000009826 distribution Methods 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 abstract description 8
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical group OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 abstract description 4
- 229910001562 pearlite Inorganic materials 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract 1
- 239000008188 pellet Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Abstract
The present invention provides a technological method for forced cooling after 82B wire rods used for steel stranded wires are rolled, and thereby, a sorbite structure with uniform cleaning rods is obtained. The present invention mainly adopts the following measures: (1) The speed of a roller way is increased during phase change. The present invention adopts the slow type roller speed which is different from that of the traditional technology owing to the limitation of the length of a strong wind cold section. In a phase change temperature-rise section, the roller speed of the roller way is caused to be the highest, and thereby, the wire rods are fully pulled apart, and the phase change is increased to cool the wire rods; the roller speeds of other sections are slower, which guarantees that the phase change is completed when the wire rods are sent out of the strong wind cold section. (2) An auxiliary blower is added to the point of the phase change. In order to strengthen phase-change cooling, the present invention adds a top-blown blower to a starting section of an NO. 5 blower. (3) The transversal allocation of air quantity is regulated by a small cover plate so that transverse cooling is uniform. The structure property of the produced wire rods is stable, the interlamellar spacing is 0.18 mu m on average, the diameter of a pearlite pellet is 8.4 mu m on average, the tensile strength of each wire rod is from 1160 to 1220MPa, and the performance difference in the same ring is less than or equal to 40MPa.
Description
Technical field
The invention belongs to the steel rolling field, mainly be applicable to and produce φ 15.24mm1860-2000MPa steel strand wires 82B wire rod.
Background technology
Steel strand wires are to become the steel strand wires goods by drawing, deep processing with the final use of 82B wire rod.Wire rod should have very high pull strength and extension property preferably.This just requires the wire rod tissue is sorbite based on fine pearlite, and average headway is 0.1～0.3 μ m, and the pro-eutectoid tissue mass is the least possible, and desmachyme can not be arranged; In addition, must not there be quenching structure martensite to occur.Austenite is low more to the perlitic transformation temperature, and sheet interlayer spacing is just thin more.
The phase change zone cooling velocity is determining austenitic decomposition transition temperature and time, is also determining the final tissue morphology of wire rod, so the key problem of whole cooling control technology is exactly how to control the phase change zone cooling velocity.Concerning the process for cooling with the air-cooled transportation of volume of loosing, the switching of the speed of transporter, fan condition and air quantity size and insulation shroud is depended in the control of cooling velocity.Transporter speed can change the density that coil lays on transporter, thus the cooling velocity of control wire rod.In general, under the identical situation of mill speed, laying temperature and cooling condition, the speed of transporter is fast more, and coil lays rarely more, and radiating rate is fast more, thereby cooling velocity is fast more.But when the speed of transporter during near certain value, it is maximum that cooling velocity reaches.Increase transporter speed this moment again, can shorten the air-cooled time of coiling on the contrary, reduces cooling effect, increases production cost.The travelling speed of standard type cooling slows down with the increase of wire gage.Fan condition and air quantity size can be carried out the combination operation of various states according to the needs of cooling.For carbon steel wire rod with high, all blower fans are all opened and with full air quantity work.Since wire rod by Laying head spue be dispersed on the roller-way after, dredge the thick state in both sides in the middle of being, therefore the middle part is different with the cooling velocity at edge, in order to strengthen the both sides air quantity, need take responsive measures, carry out air quantity optimization and distribute, make the wire rod cooling evenly, improve wire rod poker characteristic uniformity.
Fig. 1 is a standard stelmor control cold line, and its existing problem is: when (1) produced φ 12.5mm and above specification wire rod thereof, cooling velocity was obviously not enough, and temperature rise is bigger during phase transformation.620 ℃ from minimum point rise to 670 ℃, the part austenite is changed at high temperature, thereby thick pearlitic structrure occurs.(2) lack the horizontal air quantity distributor of effective blower fan, make the temperature of the temperature of wire rod limit portion overlapped points, occur " red point ", thereby cause the cooling velocity at this position to reduce greatly apparently higher than the centre, be easy to occur pro-eutectoid phase and thick pearlitic structrure, cause drawing fracture.The beginning section of (3) the first sections section of falling back 5# blower fans has the solid matter roller about 1.5 meters, and this in the phase transformation temperature-rise period, just in time is when needing strong the cooling, and does not have air-cooled everywhere.(4) strong cold section distance is short, only 27 meters.
Summary of the invention
The object of the present invention is to provide a kind of after-roll reinforced cooling process for 82 B wire rod steel strand, the cooling velocity when strengthening phase transformation is improved the air quantity transverse distribution, thereby is obtained the uniform sorbite tissue of poker.
At above-mentioned purpose, the invention provides a kind of after-roll reinforced cooling process for 82 B wire rod steel strand, adopt standard stelmor control cold line control cooling, it is characterized in that:
Roller table speed when strengthening phase transformation.
Roller speed is set to slowly-fast-slow formula, in phase transformation intensification section, makes its roller speed maximum, draws back thereby make to fill between wire rod, increases phase transformation and makes cooling rate; Concrete every section roller speed is: 0.52-0.50-0.73-0.62-0.65-0.60-0.35-0.35m/s.
Phase transformation place adds accessory fan.
In phase transformation intensification place, increasing air quantity is 2-5 ten thousand m
3The top blast blower fan of/h, auxiliary cooling.
C, regulate the air quantity transverse distribution by arrange minor flaps at interval in cooling roller bed limit portion, make horizontal cooling even, it is poor to reduce the wire rod transverse temperature, is reduced to 20 ℃ by 60 ℃.
The invention has the beneficial effects as follows that reduced the maximum temperature point of austenite during perlitic transformation, the difference of the peak of temperature and minimum point is reduced to 40 ℃ by 50 ℃ during phase transformation, it is poor to reduce the wire rod transverse temperature, is reduced to 20 ℃ by 60 ℃.Thereby obtain uniform sorbite tissue and uniform mechanical property, the wire broken rate when having significantly reduced the wire rod drawing.
Description of drawings:
Below in conjunction with drawings and Examples this invention is described further
Fig. 1 is a standard stelmor control cold line
Fig. 2 is a cooling curve
The specific embodiment
The present invention can adopt when high-speed wire factory is produced high-carbon steel wire rod.
Adopt cooling control technology of the present invention, produced the φ 12-φ 14mm82B wire rod that meets the demands at Shoudu Iron and Steel Co in enormous quantities.The process route of Shoudu Iron and Steel Co production 82B is as follows: 80 tons of converter-LF stove refining-130mm side's continuous casting and direct rolling-standard stelmor controls are cold.The chemical composition of wire rod is as follows: 0.77-0.81%C, 0.60-0.90%Mn, 0.15-0.35%Si, 0.30-0.43%Cr, 0.02-0.08%V.The start rolling temperature of wire rod is 1050-1100 ℃, and finishing temperature is 1000-1040 ℃, and laying temperature is 810-850 ℃.The wire rod structure property of being produced is stable, average sheet interlayer spacing is 0.18 μ m, average pearlite pelletizing diameter is 8.4 μ m, the tensile strength of wire rod is 1160-1220MPa, reduction of area is 30-36%, be better than customer requirements (tensile strength 〉=1150MPa, reduction of area 〉=28%), be used for draw 1860MPa steel strand wires.
The cooling curve of on-the-spot test as shown in Figure 2.For not adding the cooling curve of blower fan,, as can be seen from Figure 2, behind the interpolation blower fan, suppressed the phase transformation intensification to a certain extent above below for adding the cooling curve of blower fan.
The same circle tensile strength of wire rod is as shown in the table, and the same circle performance of wire rod is within 40MPa as can be seen from the table.
φ table 1 is with circle performance (MPa)
| Lot number | Sample 1 | Sample 2 | Sample 3 | Sample 4 | Sample 5 | Sample 6 | |
Sample 8 |
| 9-147 | 1160 | 1160 | 1180 | 1200 | 1190 | 1190 | 1190 | 1180 |
| 9-148 | 1170 | 1170 | 1180 | 1200 | 1200 | 1180 | 1180 | 1190 |
| 8-1325 | 1190 | 1190 | 1190 | 1200 | 1220 | 1190 | 1200 | 1210 |
| 8-1326 | 1190 | 1200 | 1200 | 1210 | 1210 | 1200 | 1200 | 1200 |
| 8-1327 | 1220 | 1210 | 1210 | 1200 | 1210 | 1200 | 1210 | 1220 |
| 8-1328 | 1180 | 1180 | 1190 | 1210 | 1190 | 1200 | 1180 | 1190 |
| 7-1536 | 1190 | 1190 | 1170 | 1210 | 1200 | 1200 | 1200 | 1200 |
| 7-1537 | 1180 | 1180 | 1190 | 1200 | 1200 | 1190 | 1190 | 1190 |
Take following measure:
Roller table speed when strengthening phase transformation.
Roller table speed under the normal condition is an incremental, just back one section than the last period roller speed progressively increase; Owing to be subjected to the restriction of the cold segment length of high wind, the roller that the present invention takes is fast for slow-fast-slow formula, in phase transformation intensification section, makes its roller speed maximum, fully draws back between wire rod thereby make, and increases phase transformation and makes cooling rate; Other sections roller speed has guaranteed more then that wire rod phase transformation when going out cold section of high wind finishes.Concrete every section roller speed is respectively: 0.52-0.50-0.73-0.62-0.65-0.60-0.35-0.35m/s.
Phase transformation place adds accessory fan.
For the reinforced transformation cooling, the present invention has increased a top blast blower fan in the beginning section of No. 5 blower fans.The air quantity of top blast blower fan be the 2-5 ten thousand stere/hour.
Regulate the air quantity transverse distribution by minor flaps, make horizontal cooling even.
Minor flaps is placed on air outlet place between roller-way and the roller-way, moves, guarantee horizontal temperature drop unanimity according to the actual measurement transverse temperature.Through only 20 ℃ of adjusted wire rod transverse temperature differences.
Claims (1)
1. an after-roll reinforced cooling process for 82 B wire rod steel strand adopts standard stelmor control cold line control cooling, it is characterized in that:
A, the roller table speed when strengthening phase transformation;
Roller speed is set to slowly-fast-slow formula, in phase transformation intensification section, makes its roller speed maximum, fully draws back cooling rate when increasing phase transformation thereby make between wire rod; Every section roller speed is: 0.52-0.50-0.73-0.62-0.65-0.60-0.35-0.35m/s;
B, phase transformation place add accessory fan;
In phase transformation intensification place, increasing air quantity is the top blast blower fan of 2-5 ten thousand m3/h, auxiliary cooling;
C, regulate the air quantity transverse distribution by arrange minor flaps at interval in cooling roller bed limit portion, make horizontal cooling even, it is poor to reduce the wire rod transverse temperature, is reduced to 20 ℃ by 60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101554519A CN100435990C (en) | 2004-11-17 | 2004-11-17 | After-roll reinforced cooling process for 82B wire rod steel strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101554519A CN100435990C (en) | 2004-11-17 | 2004-11-17 | After-roll reinforced cooling process for 82B wire rod steel strand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1778486A CN1778486A (en) | 2006-05-31 |
| CN100435990C true CN100435990C (en) | 2008-11-26 |
Family
ID=36769018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101554519A Expired - Fee Related CN100435990C (en) | 2004-11-17 | 2004-11-17 | After-roll reinforced cooling process for 82B wire rod steel strand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100435990C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665865B (en) * | 2009-10-14 | 2011-01-05 | 首钢总公司 | Structural transformation control method in continuous cooling process of ultra-low-carbon wire rod of square billet |
| CN101831522A (en) * | 2010-04-21 | 2010-09-15 | 首钢水城钢铁（集团）有限责任公司 | Compound strengthening production method of high-strength steel wire rods for steel strands |
| CN102162025B (en) * | 2011-03-28 | 2012-09-05 | 首钢总公司 | Method for reducing center martensitic structure of high-carbon steel coil rod |
| CN104001741B (en) * | 2014-04-29 | 2016-03-30 | 张家港联峰钢铁研究所有限公司 | The 82B wire rod of a kind of small dimension height Cr rolls rear controlled cooling model method |
| CN104056862A (en) * | 2014-07-07 | 2014-09-24 | 首钢总公司 | Control method for reducing specified non-proportional extension strength fluctuation |
| CN104772346B (en) * | 2015-04-07 | 2017-01-04 | 首钢总公司 | A kind of method reducing soft state welding wire steel gren rod tensile strength |
| CN110238192A (en) * | 2019-07-19 | 2019-09-17 | 中天钢铁集团有限公司 | Utilize the method for mini milling train production prestress wire wire rod |
| CN110586672B (en) * | 2019-10-18 | 2021-02-26 | 福建三钢闽光股份有限公司 | Stelmor cooling method for improving sorbitizing rate of 82B steel wire rod |
| CN112496062B (en) * | 2020-10-20 | 2022-07-22 | 江苏省沙钢钢铁研究院有限公司 | Method for improving performance uniformity of high-carbon steel wire rod in same circle |
| CN112589225A (en) * | 2020-11-11 | 2021-04-02 | 鞍钢股份有限公司 | Cutting method for reducing accident rate of rolling of conductive steel wire rod |
| CN113118225B (en) * | 2021-03-23 | 2023-04-07 | 首钢集团有限公司 | Method, device, equipment and medium for distributing air cooling air quantity of high-speed wire rods |
| CN113337695B (en) * | 2021-06-03 | 2023-03-14 | 广东韶钢松山股份有限公司 | Nb-containing steel wire rod and method for improving strength and toughness of Nb-containing steel wire rod |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4168993A (en) * | 1978-08-10 | 1979-09-25 | Morgan Construction Company | Process and apparatus for sequentially forming and treating steel rod |
| US4222257A (en) * | 1977-04-21 | 1980-09-16 | Hamburger Stahlwerke Gmbh | Method of manufacturing rolled wire rod |
| US5146759A (en) * | 1988-09-16 | 1992-09-15 | Toa Steel Co., Ltd. | Method for rapid direct cooling of a hot-rolled wire rod |
| JPH081232A (en) * | 1994-06-13 | 1996-01-09 | Kobe Steel Ltd | Cooling method for hot rolled wire rod |
| JPH1017943A (en) * | 1988-09-16 | 1998-01-20 | Toa Steel Co Ltd | Method for directly quenching hot-rolled steel wire rod |
| CN1184718A (en) * | 1996-12-10 | 1998-06-17 | 鞍山钢铁集团公司 | Process for producing steel wire being used to produce tyre steel cord |
-
2004
- 2004-11-17 CN CNB2004101554519A patent/CN100435990C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4222257A (en) * | 1977-04-21 | 1980-09-16 | Hamburger Stahlwerke Gmbh | Method of manufacturing rolled wire rod |
| US4168993A (en) * | 1978-08-10 | 1979-09-25 | Morgan Construction Company | Process and apparatus for sequentially forming and treating steel rod |
| US5146759A (en) * | 1988-09-16 | 1992-09-15 | Toa Steel Co., Ltd. | Method for rapid direct cooling of a hot-rolled wire rod |
| JPH1017943A (en) * | 1988-09-16 | 1998-01-20 | Toa Steel Co Ltd | Method for directly quenching hot-rolled steel wire rod |
| JPH081232A (en) * | 1994-06-13 | 1996-01-09 | Kobe Steel Ltd | Cooling method for hot rolled wire rod |
| CN1184718A (en) * | 1996-12-10 | 1998-06-17 | 鞍山钢铁集团公司 | Process for producing steel wire being used to produce tyre steel cord |
Non-Patent Citations (2)
| Title |
|---|
| 82B-1盘条同圈及同卷强度稳定性研究. 陈林.宝钢技术，第3期. 2004 * |
| 高线生产HRB335盘条的控轧控冷工艺探讨. 满新梅等.新疆钢铁，第2期. 2004 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1778486A (en) | 2006-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104001741B (en) | The 82B wire rod of a kind of small dimension height Cr rolls rear controlled cooling model method | |
| CN102876983B (en) | Production process for 82B wire rod used for high strength prestressed steel wire and wire rod thereof | |
| CN100435990C (en) | After-roll reinforced cooling process for 82B wire rod steel strand | |
| CN102912101B (en) | Production process of 65 Mn spring steel wire rod and 65 Mn spring steel wire rod | |
| CN104789880B (en) | Steel strand wire rod with characteristics of low carbon, high strength and high toughness, and production process thereof | |
| CN111074152B (en) | Hierarchical controlled cooling process for 600 MPa-grade high-strength anti-seismic weather-resistant hot-rolled steel bars | |
| CN104988409A (en) | Non-annealed cold forging steel hot-rolled wire rod and production method thereof | |
| CN110453149B (en) | High-strength finish-rolled deformed steel bar and production process thereof | |
| CN104084421A (en) | Production process for grooveless rolling of 82B wire rod by high-speed wire mill | |
| CN103589954A (en) | Hot rolling steel plate with characteristic of multiple grades in one steel, and manufacturing method thereof | |
| CN111893279A (en) | Stelmor air-cooled wire-controlled cold production method of HRB400(E) deformed steel bar with yield strength of more than or equal to 420MPa | |
| CN113403533B (en) | Method for producing HRB500E twisted steel bar by high-speed bar and HRB500E twisted steel bar produced by high-speed bar | |
| CN103774039A (en) | Manufacturing process for steel hot-rolled plate coil for welded gas bottle | |
| CN102643970A (en) | Production method of hot-rolled ribbed bar coil | |
| CN108004470B (en) | High strength steel strand low manganese high-carbon steel wire rod and preparation method | |
| CN111530942A (en) | Hot rolling process of high-quality carbon structural steel | |
| CN110923576B (en) | 635 MPa-grade high-strength disc screw for long-span beam engineering and controlled rolling and controlled cooling process thereof | |
| CN103290316A (en) | Flexible manufacturing method of hot-rolled structural steel plate | |
| CN109082597A (en) | A kind of tensile strength is 2000MPa grades of cord gren rods and production method | |
| CN100355925C (en) | Micro-alloying production for 82B wire rod of steel strand | |
| CN108286022A (en) | A kind of CRB600H and its rolling mill practice omitting process annealing processing | |
| CN110777306B (en) | Structural steel wire rod and production method thereof | |
| CN113787094A (en) | Rolling method of high-carbon free-cutting steel wire | |
| CN109097700A (en) | A kind of easy pickling mild steel steel plate of CSP process and its manufacturing method | |
| CN111893383A (en) | Steel wire rod for snap spring and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: SHOUGANG GROUP Co.,Ltd. Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee before: SHOUGANG Corp. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |