CN1586752A - Method for producing thin plate blank continuous casting and continuous rolling low carbon steel ferrite - Google Patents
Method for producing thin plate blank continuous casting and continuous rolling low carbon steel ferrite Download PDFInfo
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- CN1586752A CN1586752A CN 200410055539 CN200410055539A CN1586752A CN 1586752 A CN1586752 A CN 1586752A CN 200410055539 CN200410055539 CN 200410055539 CN 200410055539 A CN200410055539 A CN 200410055539A CN 1586752 A CN1586752 A CN 1586752A
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Abstract
The present invention relates to thin slab continuously thin slab casting and rolling process to produce low steel sheet, and especially process of producing low carbon ferrite steel sheet. The technological scheme includes the chemical components of steel including C 0.01-0.05 wt%, Mn not more than 0.040 wt%, S not more than 0.010 wt%, P not more than 0.020 wt%, Si not more than 0.050 wt% and Al 0.010-0.035 wt%; heating temperature 1100-1150 deg.c, initial coarse rolling temperature 770-800 deg.c, initial finish rolling temperature 830-860 deg.c, final finish rolling temperature 770-800 deg.c, and winding temperature 680-730 deg.c; and laminar flow cooling between the coarse rolling and finish rolling. The present invention can produce low carbon steel sheet with relatively low tensile strength, yield strength and yield strength ratio.
Description
Affiliated technical field:
The present invention relates to a kind of CSP low carbon steel producing method, refer more particularly to the method that adopts ferrite rolling to produce soft steel.
Background technology:
At present, the continuous casting and rolling technique of sheet bar flow process is: blast-melted-converter-LF refining-sheet blank continuous casting-heating-roughing-finish rolling-as to cool off-batch-finished product.The steel microstructure of this rolling technology production is that tiny ferrite crystal grain adds a spot of pearly-lustre, and the crystal grain rank is 9 grades, and tensile strength, yield strength, yield tensile ratio are all higher.For adopting ferrite production board materials production, domestic Baosteel, Anshan iron and steel plant adopt the ferrite production technology, but the product scope of using is primarily aimed at IF steel (claiming gapless atomic steel again), and wherein the weight percent of C is less than 0.005%, Mn belongs to ultra low carbon IF steel less than 0.2%.
Summary of the invention:
The object of the invention provides a kind of CSP soft steel ferrite production method, reduces steel tensile strength, yield strength, yield tensile ratio, can produce soft steel simultaneously, solves the problems referred to above that background technology exists.
Technical scheme of the present invention is: the chemical ingredients of (1) steel is C:0.01～0.05%; Mn :≤0.40%; S≤0.010%; P≤0.020%; Si≤0.050%; Als:0.010～0.035%; (2) Heating temperature is 1100-1150 ℃; Advancing the roughing temperature is 990-1110 ℃; Advancing final rolling temperature is 830-860 ℃; Going out final rolling temperature is 770-800 ℃; Coiling temperature is 680-730 ℃; Adopt the laminar flow cooling between roughing and the finish rolling.
Adopt the present invention, can produce tensile strength, yield strength, low-carbon steel plate that yield tensile ratio is lower.
Description of drawings:
Fig. 1 is processing set-up figure of the present invention
Among the figure: ladle 1, tundish 2, dephosphorization case 3, roller hearth furnace 4, edging stand 5, roughing mill 6, medium temperature control 7, flying shear 8, finishing mill 9, laminar flow cooling 10, high-speed flying shear 11, downcoiler 12.
Embodiment:
The invention will be further described by embodiment below in conjunction with accompanying drawing.
In an embodiment, continuous casting and rolling technique of sheet bar comprises blast-melted successively, ladle, tundish, the dephosphorization case, roller hearth furnace, edging stand, roughing mill, medium temperature control, flying shear, finishing mill, the laminar flow cooling, high-speed flying shear, downcoiler, sheet blank continuous casting adopts long funnel crystallizer, 2 four-high roughers are adopted in roughing, 5 four high finishing mills are adopted in finish rolling, between last frame roughing mill and first finishing mill, leave more than 20 meter distance, arranged that therebetween water cooling plant carries out medium temperature control, crop flying shear is with before adapting to the ferrite rolled piece and entering finishing mill, finish austenite to ferritic transformation, the finish rolling production process is all carried out in the ferrite scope.Rolled piece is by this interval water-cooled, finished by austenite to ferritic transformation, and it is rolling to enter finishing mill then, after going out finishing mill, can use semi-endless rolled technology and realize the raising of roll speed, thereby reduce the temperature drop of band steel, to guarantee that coiling temperature is more than 680 ℃.The composition of steel is C:0.045%; Mn:0.30%; S:0.0042%; P:0.014%; Si:0.050%; Als:0.022%.Temperature is controlled to be Heating temperature: 1100 ℃; Advance the roughing temperature: 1000 ℃; Advance final rolling temperature: 840 ℃; Go out final rolling temperature: 790 ℃; Coiling temperature: 710 ℃
The product performance that the present invention and prior art are produced are compared as follows:
| Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) | Yield tensile ratio | The crystal grain rank | |
| Background technology | ?390 | ?320 | ?37.5 | ?0.82 | Tiny ferrite crystal grain adds a spot of perlite, 9 grades |
| The present invention | ?340 | ?255 | ?37.5 | ?0.75 | Bigger recrystallize ferrite crystal grain adds a small amount of perlite, 7 grades |
As can be seen from the above table, the steel that adopts the present invention and prior art to produce is compared, tensile strength decline 50MPa, and yield strength decline 65MPa, yield tensile ratio descends 0.07, and product performance obtain effect as scheduled.
Claims (4)
1, a kind of CSP soft steel ferrite production method, technical process is: blast-melted-converter operation-LF refining-sheet blank continuous casting-heating-roughing-finish rolling-as to cool off-batch-finished product, it is characterized in that:
(1) chemical ingredients of steel is C:0.01～0.05%; Mn :≤0.40%; S≤0.010%; P≤0.020%; Si≤0.050%; Als:0.010～0.035%;
(2) Heating temperature is 1100-1150 ℃; Advancing the roughing temperature is 990-1110 ℃; Advancing final rolling temperature is 830-860 ℃; Coiling temperature is 680-730 ℃.
2, the CSP soft steel ferrite production method according to claim 1 is characterized in that final rolling temperature is 770-800 ℃.
3,, it is characterized in that adopting between roughing and the finish rolling laminar flow cooling according to claim 1 or 2 described CSP soft steel ferrite production methods.
4,, it is characterized in that sheet blank continuous casting adopts long funnel crystallizer according to claim 1 or 2 described CSP soft steel ferrite production methods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410055539 CN1586752A (en) | 2004-08-03 | 2004-08-03 | Method for producing thin plate blank continuous casting and continuous rolling low carbon steel ferrite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410055539 CN1586752A (en) | 2004-08-03 | 2004-08-03 | Method for producing thin plate blank continuous casting and continuous rolling low carbon steel ferrite |
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| CN1586752A true CN1586752A (en) | 2005-03-02 |
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| CN 200410055539 Pending CN1586752A (en) | 2004-08-03 | 2004-08-03 | Method for producing thin plate blank continuous casting and continuous rolling low carbon steel ferrite |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434200C (en) * | 2006-12-31 | 2008-11-19 | 山西太钢不锈钢股份有限公司 | Method for preventing surface oxide film of nichrome roller from being peeling-off |
| CN100588734C (en) * | 2007-11-27 | 2010-02-10 | 湖南华菱湘潭钢铁有限公司 | High-strength shipbuilding section and production method thereof |
| CN101328564B (en) * | 2007-06-21 | 2010-04-07 | 宝山钢铁股份有限公司 | Low yield ratio HT780 steel plate having superior weldability and manufacturing method thereof |
| CN102581008A (en) * | 2012-03-01 | 2012-07-18 | 河北钢铁股份有限公司唐山分公司 | Processing method for producing low-cost high-formability IF (interstitial-free) steel |
| CN106222561A (en) * | 2016-08-30 | 2016-12-14 | 日照宝华新材料有限公司 | The method producing low-carbon (LC) fire-fighting equipment steel based on ESP bar strip continuous casting and rolling flow path |
| CN106244921A (en) * | 2016-08-30 | 2016-12-21 | 武汉钢铁股份有限公司 | A kind of method producing line employing rolling in ferrite domains production mild steel at CSP |
| CN107597844A (en) * | 2017-10-16 | 2018-01-19 | 北京科技大学 | The ferrite rolling method and apparatus that endless casting rolling deep-draw is rolled up with humble carbon steel |
| CN107597845A (en) * | 2017-10-16 | 2018-01-19 | 北京科技大学 | Ultra-low carbon coil of strip ferrite rolling method and apparatus are used in the punching of endless casting rolling ultra-deep |
| CN107876564A (en) * | 2017-12-15 | 2018-04-06 | 唐山全丰薄板有限公司 | A kind of ferrite rolling control device and its control technique |
| CN108994081A (en) * | 2018-06-25 | 2018-12-14 | 中冶赛迪工程技术股份有限公司 | A method of mild steel being produced using ferrite rolling in ESP production line |
| CN111545569A (en) * | 2020-05-20 | 2020-08-18 | 江苏华伟特种薄板有限公司 | Rolling process of low-manganese low-alloy steel plate |
| CN111589865A (en) * | 2020-05-26 | 2020-08-28 | 中冶赛迪工程技术股份有限公司 | Low-yield-ratio thin strip steel continuous casting and rolling production line and production process |
| CN114173957A (en) * | 2019-07-24 | 2022-03-11 | 首要金属科技奥地利有限责任公司 | Production of deep-drawable steel strip in a combined casting and rolling installation |
-
2004
- 2004-08-03 CN CN 200410055539 patent/CN1586752A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434200C (en) * | 2006-12-31 | 2008-11-19 | 山西太钢不锈钢股份有限公司 | Method for preventing surface oxide film of nichrome roller from being peeling-off |
| CN101328564B (en) * | 2007-06-21 | 2010-04-07 | 宝山钢铁股份有限公司 | Low yield ratio HT780 steel plate having superior weldability and manufacturing method thereof |
| CN100588734C (en) * | 2007-11-27 | 2010-02-10 | 湖南华菱湘潭钢铁有限公司 | High-strength shipbuilding section and production method thereof |
| CN102581008A (en) * | 2012-03-01 | 2012-07-18 | 河北钢铁股份有限公司唐山分公司 | Processing method for producing low-cost high-formability IF (interstitial-free) steel |
| CN106222561B (en) * | 2016-08-30 | 2018-03-27 | 日照钢铁控股集团有限公司 | Method based on ESP bar strip continuous casting and rolling flow paths production low-carbon fire-fighting equipment steel |
| CN106244921A (en) * | 2016-08-30 | 2016-12-21 | 武汉钢铁股份有限公司 | A kind of method producing line employing rolling in ferrite domains production mild steel at CSP |
| CN106222561A (en) * | 2016-08-30 | 2016-12-14 | 日照宝华新材料有限公司 | The method producing low-carbon (LC) fire-fighting equipment steel based on ESP bar strip continuous casting and rolling flow path |
| CN106244921B (en) * | 2016-08-30 | 2018-05-01 | 武汉钢铁有限公司 | A kind of method in CSP producing lines using rolling in ferrite domains production mild steel |
| CN107597844A (en) * | 2017-10-16 | 2018-01-19 | 北京科技大学 | The ferrite rolling method and apparatus that endless casting rolling deep-draw is rolled up with humble carbon steel |
| CN107597845A (en) * | 2017-10-16 | 2018-01-19 | 北京科技大学 | Ultra-low carbon coil of strip ferrite rolling method and apparatus are used in the punching of endless casting rolling ultra-deep |
| CN107597845B (en) * | 2017-10-16 | 2023-08-11 | 北京科技大学 | Method and device for rolling ferrite of ultralow-carbon steel coil for endless continuous casting and rolling ultra-deep drawing |
| CN107876564A (en) * | 2017-12-15 | 2018-04-06 | 唐山全丰薄板有限公司 | A kind of ferrite rolling control device and its control technique |
| CN108994081A (en) * | 2018-06-25 | 2018-12-14 | 中冶赛迪工程技术股份有限公司 | A method of mild steel being produced using ferrite rolling in ESP production line |
| CN114173957A (en) * | 2019-07-24 | 2022-03-11 | 首要金属科技奥地利有限责任公司 | Production of deep-drawable steel strip in a combined casting and rolling installation |
| CN114173957B (en) * | 2019-07-24 | 2024-01-16 | 首要金属科技奥地利有限责任公司 | Production of deep drawable steel strip in a casting and rolling complex |
| CN111545569A (en) * | 2020-05-20 | 2020-08-18 | 江苏华伟特种薄板有限公司 | Rolling process of low-manganese low-alloy steel plate |
| CN111589865A (en) * | 2020-05-26 | 2020-08-28 | 中冶赛迪工程技术股份有限公司 | Low-yield-ratio thin strip steel continuous casting and rolling production line and production process |
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