CN1563467A - Manufacturing technique of hot rolled high tensile steel plate in use for cars based on compact type process flow of producing band steel - Google Patents
Manufacturing technique of hot rolled high tensile steel plate in use for cars based on compact type process flow of producing band steel Download PDFInfo
- Publication number
- CN1563467A CN1563467A CN 200410026496 CN200410026496A CN1563467A CN 1563467 A CN1563467 A CN 1563467A CN 200410026496 CN200410026496 CN 200410026496 CN 200410026496 A CN200410026496 A CN 200410026496A CN 1563467 A CN1563467 A CN 1563467A
- Authority
- CN
- China
- Prior art keywords
- steel
- temperature
- rolling
- strand
- cooling
- 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
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
Abstract
This invention disclose a production technology for hot-rolled high intensity steel plates used in cars based on compact strip production technology including the following steps: steel smelting-> conticasting-> soakage-> hot tandem rolling. Compared with the current technology, this invention has the following advantages: Since adopting CSP, its not necessary to addmicroalloy V, strand cooling test and second heating process in traditional technology but it enters into the soaking pit directly to be soaked and rolled which shortens the process and reduces cost.
Description
Technical field
The present invention relates to the production technique of a kind of automobile, particularly relate to a kind of CSP of utilization flow process and produce the production technique of automobile with hot-rolled high-strength steel plate with hot-rolled high-strength steel plate.
Background technology
Traditional automobile with the technological process of production of hot-rolled high-strength steel plate is: molten steel → continuous casting → continuously cast bloom cooling and inspection → reconditioning → heating → hot rolling, wherein, need carry out microalloying and steel billet is cooled off molten steel, its technical process is long, energy consumption is high, the cost of alloy height causes production cost higher.Compact band steel production technique (the Compact Strip Production that later 1980s succeeds in U.S. Niu Ke company, abbreviation CSP) feature is a CSP, and its technical process is: electric furnace or converter provide molten steel → continuous casting → soaking → hot continuous rolling.As using CSP explained hereafter high-strength vehicle hot-rolled steel sheet, because automobile is mainly 09SiVL and 16MnREL with the steel grade trade mark of hot-rolled high-strength steel plate, for guaranteeing the intensity of auto sheet, must add microalloy V, cost must increase, so the CSP production technique is not used for the production of automobile with the hot-rolled low carbon high tensile steel plate so far as yet.
Summary of the invention
The object of the present invention is to provide that a kind of technology is simple, cost is low based on the automobile of the compact band steel technological process of production production technique with hot-rolled high-strength steel plate, this technology need not to add microalloy V.
In order to achieve the above object, the invention provides the production technique of a kind of automobile based on the compact band steel technological process of production, comprise the step of following order with hot-rolled high-strength steel plate:
(1) steel-making: select conventional steel-making with electric furnace or converter for use, the weight percentage of tapping carbon is controlled at 0.04～0.08%, and tapping temperature is 1620～1650 ℃; The molten steel that steel melting furnace is come out carries out refining in ladle refining furnace, liquid steel temperature was controlled at 1590～1605 ℃ when refining finished, and the weight percentage content of molten steel composition is controlled at: C0.16～0.19, Si0.30～0.50, Mn0.15～1.60, P0.01～0.025, S＜0.010, Cu＜0.15, Al0.02～0.05;
(2) continuous casting: molten steel injects tundish by the slide gate nozzle of ladle bottom, and the tundish liquid steel temperature is 1535～1555 ℃, adopts funnel-type crystallizer, and the strand pulling rate is 4.0～5.5m/min, and the slab thickness that goes out crystallizer is 50mm～70mm;
(3) soaking: above-mentioned strand enters soaking pit after shearing through two cooling bending straightenings, and it is 950～1050 ℃ that strand advances furnace temperature, and tapping temperature is 1100～1160 ℃;
(4) hot continuous rolling: enter hot continuous mill after going out the iron scale that forms on the strand process scale breaker removal casting billet surface of soaking pit, start rolling temperature is 1060～1100 ℃, finishing temperature is 750～850 ℃, and rolling V-bar is about 6m/s, and the sheet gauge after rolling is 2.0～12.0mm;
(5) batch: thin plate batches rolling by reeling machine after the cooling of laminar flow cooling section, the cooling section speed of cooling is 15～100 ℃/s continuously, and coiling temperature is 500～620 ℃.
The weight percentage of the carbon content of molten steel after refining is controlled at less than 0.20% among the present invention, can guarantee the welding property of autobody sheet, liquid steel refining among the present invention can meet the requirements molten steel composition and temperature by such as heating up, adding alloy and be adjusted to conventional measures such as branch, calcium processing.The selection of the start rolling temperature of hot continuous rolling of the present invention, finishing temperature, laminar flow speed of cooling and coiling temperature is in order to carry out controlled rolling and controlled cooling, to obtain required steel plate tissue and performance to satisfy the requirement of automobile with hot-rolled high-strength steel plate.
The present invention compared with prior art has following advantage: owing to adopt the CSP flow process, microalloy V, the strand cooling that adds that need not in the traditional technology is checked and post bake process, be rolled after directly entering the soaking pit soaking, shortened technical process, improved production efficiency, production energy consumption and cost decrease, and energy consumption per ton steel of the present invention is 40～41% of an old process, the continuously cast bloom recovery rate brings up to 97.0% by 94.6% of old process, and ton steel cost descends 30～50 dollars.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the synoptic diagram of embodiments of the invention equipment therefor.
Embodiment 1
The embodiment of the invention 1 in turn includes the following steps:
(1) steel-making: the ZJ510L steel grade that the auto sheet material selects for use Zhujiang Iron and Steel Co Ltd, Guangzhou to produce, steel melting furnace 1 employing capacity is 150 tons a vertical electric furnace, and tap is 150 tons, and the weight percentage of tapping carbon is 0.06%, and tapping temperature is 1630; The molten steel that steel melting furnace is come out carries out refining in ladle refining furnace 2, adopt to heat up, add alloy and be adjusted to ordinary methods such as branch, calcium processing, the weight percentage content of the molten steel composition when refining is finished is controlled at C0.17, Si0.38, Mn1.21, P0.018, S0.008, Cu0.12, Al0.025, and liquid steel temperature is 1600 ℃.
(2) continuous casting: molten steel injects tundish 4 by the slide gate nozzle of ladle 3 bottoms, tundish capacity is 30 tons, the liquid steel temperature of tundish is 1545 ℃, when treating that molten steel weight reaches 22 tons of left and right sides, open the stopper of tundish, molten steel is from tundish priming funnel type crystallizer 5, and this mold oscillation is a hydraulic vibration, the strand pulling rate is 4.8m/min, and the slab thickness that goes out crystallizer is 50mm.
(3) soaking: strand enters later soaking pit 7 through secondary cooling zone cooling bending straightening shear 6, it is 980 ℃ that strand advances furnace temperature, and tapping temperature is 1140 ℃, and strand heats up and equalizing temperature at soaking pit, the length of soaking pit is 192 meters, and the strand residence time is 28min.
(4) hot continuous rolling: after strand goes out soaking pit 7, remove the iron scale that forms on the casting billet surface through scale breaker 8 and enter six frame hot continuous mills 9, start rolling temperature is 1080 ℃, and finishing temperature is 810 ℃, rolling V-bar is about 6m/s, and the sheet gauge after rolling is 5.0～12.0mm.
(5) batch: above-mentioned thin plate batches rolling by reeling machine 11 after 10 coolings of laminar flow cooling section, continuous 70 ℃/s of cooling section speed of cooling, and coiling temperature is 590 ℃.
The whole piece CSP of present embodiment produces line length 350mm, and the width of finished product volume is 1180mm, 24.8 tons of maximum volume-weights.
The finished product automotive sheet that present embodiment is produced is more as shown in table 1 with conventional 09SiVL trade mark chemical ingredients, and its mechanical property is as shown in table 3, has all reached the requirement of the 09SiVL trade mark, its σ
sOn average be higher than 14% of standard value, δ on average is higher than 16% of standard value.
Automotive sheet that table 1 embodiment 1 produces and the chemical ingredients of 09SiVL are relatively
| Kind | ????C | ????Si | ??Mn | ??P | ??S | Microalloy V | ????Cu | ??AL |
| Embodiment 1 | ????0.17 | ????0.38 | ??1.21 | ??0.018 | ??0.008 | ????0.12 | ??0.025 | |
| ????09SiVL | ????0.08～ ????0.15 | ????0.70～ ????1.00 | ??0.45～ ??0.75 | ??＜0.035 | ??＜0.035 | ??0.07～ ??0.20 |
The auto sheet mechanical property that table 2 embodiment 1 produces
| Plate thickness (mm) | ????σ s(Mpa) | ????σ b(Mpa) | ????δ(％) |
| ????12.0 | ????385 | ????560 | ????28 |
| ????12.0 | ????380 | ????560 | ????30 |
| ????8.0 | ????405 | ????575 | ????26 |
| ????8.0 | ????400 | ????570 | ????27 |
| ????6.0 | ????435 | ????580 | ????28 |
| ????6.0 | ????430 | ????585 | ????29 |
| ????5.0 | ????415 | ????560 | ????26 |
| ????5.0 | ????425 | ????555 | ????27 |
| ????09SiVL | ????≥355 | ????510～610 | ????≥24 |
Embodiment 2
The embodiment of the invention 2 in turn includes the following steps:
(1) steel-making: the ZJ510L steel grade that the auto sheet material selects for use Zhujiang Iron and Steel Co Ltd, Guangzhou to produce, steel melting furnace 1 employing capacity is 150 tons a vertical electric furnace, and tap is 150 tons, and the weight percentage of tapping carbon is 0.05%, and tapping temperature is 1625; The molten steel that steel melting furnace is come out carries out refining in ladle refining furnace 2, adopt to heat up, add alloy and be adjusted to ordinary methods such as branch, calcium processing, the weight percentage content of the molten steel composition when refining is finished is controlled at C0.18, Si0.35, Mn1.20, P0.017, S0.008, Cu0.13, Al0.030, and liquid steel temperature is 1602 ℃.
(2) continuous casting: molten steel injects tundish 4 by the slide gate nozzle of ladle 3 bottoms, tundish capacity is 28 tons, the liquid steel temperature of tundish is 1546 ℃, when treating that molten steel weight reaches 22 tons of left and right sides, open the stopper of tundish, molten steel is from tundish priming funnel type crystallizer 5, and this mold oscillation is a hydraulic vibration, the strand pulling rate is 4.9m/min, and the slab thickness that goes out crystallizer is 60mm.
(3) soaking: strand enters later soaking pit 7 through secondary cooling zone cooling bending straightening shear 6, it is 960 ℃ that strand advances furnace temperature, and tapping temperature is 1130 ℃, and strand heats up and equalizing temperature at soaking pit, the length of soaking pit is 192 meters, and the strand residence time is 27min.
(4) hot continuous rolling: after strand goes out soaking pit 7, remove the iron scale that forms on the casting billet surface through scale breaker 8 and enter six frame hot continuous mills 9, start rolling temperature is 1075 ℃, and finishing temperature is 815 ℃, rolling V-bar is about 6m/s, and the sheet gauge after rolling is 5.0～12.0mm.
(5) batch: above-mentioned thin plate batches rolling by reeling machine 11 after 10 coolings of laminar flow cooling section, continuous 70 ℃/s of cooling section speed of cooling, and coiling temperature is 600 ℃.
The whole piece CSP of present embodiment produces line length 350mm, and the width of finished product volume is 1250mm, 24.8 tons of maximum volume-weights.
The finished product automotive sheet that present embodiment is produced is more as shown in table 3 with conventional 09SiVL trade mark chemical ingredients, its mechanical property is as shown in table 4, all reached the requirement of the 09SiVL trade mark, its σ s on average is higher than 22% of standard value, and δ on average is higher than 18% of standard value.
Automotive sheet that table 3 embodiment 2 produces and the chemical ingredients of 09SiVL are relatively
| Kind | ????C | ????Si | ??Mn | ??P | ??S | Microalloy V | ??Cu | ??Al |
| Embodiment 2 | ????0.18 | ????0.35 | ??1.20 | ??0.017 | ??0.008 | ??0.13 | ??0.030 | |
| ??09SiVL | ????0.08～ ????0.15 | ????0.70～ ????1.00 | ??0.45～ ??0.75 | ??＜0.035 | ??＜0.035 | ??0.07 ??～0.20 |
The mechanical property of the autobody sheet that table 4 embodiment 2 produces
| Thickness (mm) | ????σ s(Mpa) | ????σ b(Mpa) | ????δ(％) |
| ????8.0 | ????440 | ????575 | ????29 |
| ????8.0 | ????435 | ????570 | ????28 |
| ????6.5 | ????435 | ????565 | ????27 |
| ????6.5 | ????440 | ????570 | ????28 |
| ????6.0 | ????430 | ????560 | ????30 |
| ????6.0 | ????435 | ????565 | ????29 |
| ????5.0 | ????435 | ????555 | ????28 |
| ????5.0 | ????428 | ????560 | ????29 |
| ????09SiVL | ????≥355 | ????510～610 | ????≥24 |
Claims (2)
1, a kind of automobile based on the compact band steel technological process of production comprises the step of following order with the production technique of hot-rolled high-strength steel plate:
(1) steel-making: select conventional steel-making with electric furnace or converter for use, the weight percentage of tapping carbon is controlled at 0.04～0.08%, and tapping temperature is 1620～1650 ℃; The molten steel that steel melting furnace is come out carries out refining in ladle refining furnace, liquid steel temperature was controlled at 1590～1605 ℃ when refining finished, and the weight percentage content of molten steel composition is controlled at: C 0.16～0.19, Si 0.30～0.50, Mn 0.15～1.60, P0.01～0.025, S＜0.010, Cu＜0.1 5, Al 0.02～0.05;
(2) continuous casting: molten steel injects tundish by the slide gate nozzle of ladle bottom, and the tundish liquid steel temperature is 1535～1555 ℃, adopts funnel-type crystallizer, and the strand pulling rate is 4.0～5.5m/min, and the slab thickness that goes out crystallizer is 50mm～70mm;
(3) soaking: above-mentioned strand enters soaking pit after shearing through two cooling bending straightenings, and it is 950～1050 ℃ that strand advances furnace temperature, and tapping temperature is 1100～1160 ℃;
(4) hot continuous rolling: enter hot continuous mill after going out the iron scale that forms on the strand process scale breaker removal casting billet surface of soaking pit, start rolling temperature is 1060～1100 ℃, finishing temperature is 750～850 ℃, and rolling V-bar is about 6m/s, and the sheet gauge after rolling is 2.0～12.0mm;
(5) batch: thin plate batches rolling by reeling machine after the cooling of laminar flow cooling section, the cooling section speed of cooling is 15～100 ℃/s continuously, and coiling temperature is 500～620 ℃.
2, production technique according to claim 1 is characterized in that the liquid steel refining in the step (1) can be adjusted to branch or calcium processing conventional measure by the alloy that heats up, adds, and molten steel composition and temperature are met the requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026496 CN1242086C (en) | 2004-03-17 | 2004-03-17 | Manufacturing technique of hot rolled high tensile steel plate in use for cars based on compact type process flow of producing band steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026496 CN1242086C (en) | 2004-03-17 | 2004-03-17 | Manufacturing technique of hot rolled high tensile steel plate in use for cars based on compact type process flow of producing band steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563467A true CN1563467A (en) | 2005-01-12 |
| CN1242086C CN1242086C (en) | 2006-02-15 |
Family
ID=34480614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410026496 Expired - Fee Related CN1242086C (en) | 2004-03-17 | 2004-03-17 | Manufacturing technique of hot rolled high tensile steel plate in use for cars based on compact type process flow of producing band steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1242086C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435987C (en) * | 2006-11-10 | 2008-11-26 | 广州珠江钢铁有限责任公司 | Method for manufacturing 700MPa high-strength weathering steel based on thin slab continuous casting and rolling flow by use of Ti microalloying process |
| CN100485073C (en) * | 2006-12-18 | 2009-05-06 | 马鞍山钢铁股份有限公司 | Production process of punch level cold rolled steel plate based on CSP technology |
| CN1970811B (en) * | 2005-11-25 | 2010-05-12 | 鞍钢股份有限公司 | Steel for high-strength cold-bending forming structure and production method thereof |
| CN101629268B (en) * | 2009-07-30 | 2011-02-02 | 江苏沙钢集团淮钢特钢有限公司 | Microalloying high-strength and anti-crack flat steel for automobile girder and production process thereof |
| CN102392442A (en) * | 2011-09-15 | 2012-03-28 | 马鞍山市华科实业有限公司 | Method for manufacturing end plate for tube pile by centrifugal casting and direct cross rolling |
| CN102492824A (en) * | 2011-12-12 | 2012-06-13 | 北京科技大学 | Continuous heat treatment method of high-strength steel belts or steel plates |
| CN102943200A (en) * | 2012-11-09 | 2013-02-27 | 武汉钢铁(集团)公司 | Method for producing low-carbon thin pickling steel with yield ratio less than or equal to 0.8 through CSP (cast steel plate) process |
-
2004
- 2004-03-17 CN CN 200410026496 patent/CN1242086C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1970811B (en) * | 2005-11-25 | 2010-05-12 | 鞍钢股份有限公司 | Steel for high-strength cold-bending forming structure and production method thereof |
| CN100435987C (en) * | 2006-11-10 | 2008-11-26 | 广州珠江钢铁有限责任公司 | Method for manufacturing 700MPa high-strength weathering steel based on thin slab continuous casting and rolling flow by use of Ti microalloying process |
| CN100485073C (en) * | 2006-12-18 | 2009-05-06 | 马鞍山钢铁股份有限公司 | Production process of punch level cold rolled steel plate based on CSP technology |
| CN101629268B (en) * | 2009-07-30 | 2011-02-02 | 江苏沙钢集团淮钢特钢有限公司 | Microalloying high-strength and anti-crack flat steel for automobile girder and production process thereof |
| CN102392442A (en) * | 2011-09-15 | 2012-03-28 | 马鞍山市华科实业有限公司 | Method for manufacturing end plate for tube pile by centrifugal casting and direct cross rolling |
| CN102392442B (en) * | 2011-09-15 | 2013-10-16 | 马鞍山市华科实业有限公司 | Method for manufacturing end plate for tube pile by centrifugal casting and direct cross rolling |
| CN102492824A (en) * | 2011-12-12 | 2012-06-13 | 北京科技大学 | Continuous heat treatment method of high-strength steel belts or steel plates |
| CN102943200A (en) * | 2012-11-09 | 2013-02-27 | 武汉钢铁(集团)公司 | Method for producing low-carbon thin pickling steel with yield ratio less than or equal to 0.8 through CSP (cast steel plate) process |
| CN102943200B (en) * | 2012-11-09 | 2015-01-07 | 武汉钢铁(集团)公司 | Method for producing low-carbon thin pickling steel with yield ratio less than or equal to 0.8 through CSP (cast steel plate) process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1242086C (en) | 2006-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106756507B (en) | The method for producing Thin Specs high-carbon steel based on ESP bar strip continuous casting and rolling flow paths | |
| CN101096034B (en) | Production method of ultra-low carbon steel for car outer plate | |
| US8021599B2 (en) | Method and installation for producing steel products with optimum surface quality | |
| US20080164003A1 (en) | Method and Installation for Producing Light Gauge Steel with a High Manganese Content | |
| CN106148803B (en) | A kind of production method of deep-draw battery case steel | |
| CN111304530B (en) | Large-thickness high-toughness steel plate and production method thereof | |
| WO2015095913A1 (en) | Production of high strength high ductility high copper carbon alloy thin cast strip | |
| CN112981232B (en) | 12Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement for continuous casting billet finished product and production process thereof | |
| CN100560773C (en) | A kind of high-strength anti-fatigue steel products and manufacture method thereof | |
| CN101139685A (en) | High-strength antifatigue steel products and method for manufacturing same | |
| CN113481427A (en) | Medium-carbon low-alloy CrMnSiB series steel forging and rolling bar for producing cold heading module by continuous casting billet and manufacturing method thereof | |
| CN110541113A (en) | High-strength steel bar and production method thereof | |
| CN112210725A (en) | Steel strip for hot forming with tensile strength of 1900MPa and production method thereof | |
| CN100336617C (en) | Method for using hot-rolled steel plate to produce and steel cylinder by using continuously casting and rolling thin steel blanket | |
| CN1242086C (en) | Manufacturing technique of hot rolled high tensile steel plate in use for cars based on compact type process flow of producing band steel | |
| CN100404149C (en) | Sheet slab C-Mn excellent high-strength sheet-band steel production process | |
| CN1184118C (en) | Technology for manufacturing plates for container | |
| CN105665662B (en) | Flux-cored wire based on ESP lines steel making method | |
| CN1207407C (en) | Method for improving cold-forming property of hot rolled steel plate | |
| CN106756528A (en) | A kind of nitrogen medium managese steel strip high and its near-net forming preparation method | |
| CN101550515A (en) | Copper-containing high-strength and high-ductility high manganese steel and production method thereof | |
| CA1179473A (en) | Continuous cast steel product having reduced microsegregation | |
| JPH07276020A (en) | Continuous casting method | |
| CN110777302B (en) | Method for producing 2GPa hot forming steel by FTSC thin slab production line | |
| RU2575266C1 (en) | Method of production of railroad rail |
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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060215 Termination date: 20130317 |