CN100396391C - Thin steel belt casting and rolling production process - Google Patents
Thin steel belt casting and rolling production process Download PDFInfo
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- CN100396391C CN100396391C CNB2005100988110A CN200510098811A CN100396391C CN 100396391 C CN100396391 C CN 100396391C CN B2005100988110 A CNB2005100988110 A CN B2005100988110A CN 200510098811 A CN200510098811 A CN 200510098811A CN 100396391 C CN100396391 C CN 100396391C
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- high temperature
- thin steel
- production process
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- 238000005096 rolling process Methods 0.000 title claims abstract description 67
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000005266 casting Methods 0.000 title claims abstract description 15
- 238000009749 continuous casting Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 6
- 229910001566 austenite Inorganic materials 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 230000000994 depressogenic effect Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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Abstract
The present invention relates to a production technology for casting and rolling thin steel strips. The present invention has the following technology flow: continuous casting-high pressure water descaling-high temperature rolling-finish rolling-controlled cooling-flying shear to section-winding finished products. In the technology steps, the metallurgical length of cast billets is controlled to reach an entrance of a high temperature rolling machine; in the high temperature rolling, 2 to 3 rolling machines which are tightly arranged are used for first high temperature austenitic area rolling with reducing degree of 40 to 60%; intermediate billets are controlled to be rolled in the precision rolling step. The production technology is suitable for thin steel strips with the thickness of 1 to 16mm and the width of 600 to 2200mm; the thickness of corresponding continuous casting billets is from 70 to 100mm, and the width is from 600 to 2200mm. The present invention sufficiently uses the heat energy of molten steel, and adopts high temperature soft depression rolling and control rolling, and the endless production of thin steel strips is realized without arranging any heating devices on the whole production line. Compared with the existing production technology for thin steel strips, the present invention has advantages of energy saving, production cost reduction, device and construction investment reduction, and effective improvement of production efficiency and product quality.
Description
Technical field
The present invention relates to the rolling of metal, be specifically related to a kind of thin steel belt casting and rolling production process.
Background technology
At present, the production method of strip steel has a lot, and it mainly is divided into two classes: a class is medium thin slab continuous casting (50-150mm)-heating-rolling, as CSP, ISP, FTSC, CONROLL, ASP; Another kind of is strip base continuous casting-heating-rolling, as CPR.First kind method generally need be rolled or finish rolling after behind the continuous casting continuous casting billet or intermediate blank being cut off, heat again, enter all be provided with before the finishing mill in the middle of heater, ISP technology also is provided with the Cremona stove.Second class methods are carried out liquid core rolling in the continuous cast mold outlet, make strand reach very thin size (the CPR method reaches 14-20mm), are rolled into finished product through finish rolling again after heating, can realize endless rolling.
Summary of the invention
The object of the present invention is to provide a kind of heat energy that makes full use of molten steel, use that high temperature is soft to be depressed rolling and controlled rolling, need not to be provided with any heater on the whole production line, and realize the thin steel belt casting and rolling production process of strip steel production without a head.
The technological process of thin steel belt casting and rolling production process of the present invention is: continuous casting-high-pressure water descaling-high temperature rolling-finish rolling-control cooling-flying shear segmentation-batch is finished product.
This thin steel belt casting and rolling production process, control strand metallurgical length rolling milling train porch that reaches a high temperature; It is rolling that high temperature rolling carries out the high temperature austenite district by the 2-3 rolling mill of compact Layout, and the strand core temperature that enters milling train is greater than 1200 ℃, and less than setting temperature, percentage pass reduction is 40-60%; Finish rolling closely is connected with high temperature rolling, and the intermediate blank that enters finish rolling is carried out cooling fast between frame, is used to regulate and control to enter the steel billet temperature of finish rolling, carries out controlled rolling.
The strip product made from steel thickness that this thin steel belt casting and rolling production process is fit to is 1-16mm, and width is 600-2200mm; Pairing thickness of strand is 70-100mm, and width is 600-2200mm.
The present invention makes full use of the heat energy of molten steel, uses that high temperature is soft to be depressed rolling and controlled rolling, need not to be provided with any heater on the whole production line, and realizes the production without a head of strip steel, compares with existing thin steel belt casting and rolling production process, has following advantage:
But 1 energy savings reduces production costs and equipment investment greatly, and reduces environmental pollution;
2, effectively improve casting-rolling of thin band steel production efficiency, product quality and lumber recovery;
3, the length of the height of equipment and production line reduces, and helps reducing capital expenditure.
Description of drawings
Accompanying drawing is a production-line arrangement schematic diagram of realizing production technology of the present invention.Among the figure: the 1-tundish; The 2-crystallizer; The 3-0# cooling section; The 4-1# cooling section; The 5-2# cooling section; The 6-high pressure water descaling device; 7-high temperature rolling unit; The 8-mm finishing mill unit; 9-inter-stand cooling device; 10-controls cooling device; The 11-sectional flying shear; The 12-coiling machine.
The specific embodiment
In conjunction with the accompanying drawings the specific embodiment of the present invention is described.
As accompanying drawing, the present invention finishes the continuous casting process step by tundish 1, crystallizer 2 and 0#, 1#, 2 # cooling section 3,4,5.Qualified molten steel by steel-making, refining enters in the crystallizer 2 by tundish 1 and casts, can adopt a series of mature technologies that are suitable for the high-quality continuous casting billet this moment, as hydraulic vibration, electromagnetic braking etc., its purpose is to guarantee the inherence and the surface quality of continuous casting billet, and make and draw steel speed to improve as far as possible, be not less than 3.5m/min during normal the use, to guarantee carrying out smoothly of strip casting process.Continuous cast mold 2 can adopt dull and stereotyped, multiple suitable form funnel type, lenticular lens type.0#, 1#, 2 # cooling section 3,4,5 adopts dry types cooling and water-air cooling compound modes but, and dry type cooling and water-air cooling are but all used when maximum intensity of cooling, only opens dry type during minimum intensity of cooling and cools off.The 0# fan-shaped section is not carried out the liquid core and is depressed, and its purpose is the thickness of base shell is further controlled, and when both having guaranteed high pulling rate enough shell thicknesses is arranged, and prevents bleed-out, and strand liquid core amount abundance satisfies the control of metallurgical length when guaranteeing low pulling rate again.The liquid core that 1# fan-shaped section and 2# fan-shaped section can be used for finishing strand is depressed and the further cooling of strand, and the liquid core is depressed total amount 10-30mm.The control target of continuous casting metallurgical length is that the outlet that length reaches high pressure water descaling device 6 is the porch of high temperature rolling unit 7.High-pressure water descaling is finished by water-saving high pressure water descaling device 6, and general hydraulic pressure is 40Mpa, and its purpose is for removing the iron scale of billet surface, and further cools off steel billet, solidifies fully before making steel billet enter the high temperature milling train after de-scaling.High temperature rolling is finished by high temperature rolling unit 7, and unit is made up of the 2-3 rolling mill, can adopt 2 rollers, 4 roller mills, and compact Layout as far as possible adopts that to part power a little rolling, does not establish kink between frame.The strand core temperature that control enters milling train is greater than 1200 ℃, and less than setting temperature, it is rolling to carry out the high temperature austenite district.Owing to carry out that high temperature is soft to be depressed rollingly, can realize large deformation with less energy consumption, percentage pass reduction is 40-60%.Finish rolling is finished by mm finishing mill unit 8.Mm finishing mill unit closely is connected with the high temperature rolling unit, make the intermediate blank that enters finish rolling that higher temperature is arranged as far as possible, and carry out cooling fast between frame by the intermediate blank that 9 pairs in inter-stand cooling device enters finishing mill, accuracy controlling finish rolling intermediate blank temperature is carried out controlled rolling.Control cooling by the cooling facility for laminar flow 10 that is provided with after the finish rolling.Be arranged at cooling device sectional flying shear 11 afterwards and carry out the flying shear segmentation.Batch by coiling machine 12 afterwards and be finished product.
Thin steel belt casting and rolling production process of the present invention is applicable to common straightcarbon steel, structural carbon steel, low-alloy structural steel, structural alloy steel, stainless steel.The thickness of strip product made from steel is 1-16mm, and width is 600-2200mm; The thickness of pairing continuous casting billet is 70-100mm, and width is 600-2200mm.Can be not less than 5 times of thickness specifications of determining continuous casting billet with compression ratio according to the thickness of maximum product.
Claims (4)
1. thin steel belt casting and rolling production process is characterized in that its technological process is: continuous casting-high-pressure water descaling-high temperature rolling-finish rolling-control cooling-flying shear segmentation-batch is finished product; Its control strand metallurgical length rolling milling train porch that reaches a high temperature; The rolling temperature of high temperature rolling is greater than 1200 ℃.
2. thin steel belt casting and rolling production process according to claim 1, it is rolling to it is characterized in that high temperature rolling carries out the high temperature austenite district by the 2-3 rolling mill of compact Layout, the strand core temperature that enters milling train is greater than 1200 ℃, and less than setting temperature, percentage pass reduction is 40-60%.
3. thin steel belt casting and rolling production process according to claim 1 is characterized in that finish rolling closely is connected with high temperature rolling, and the intermediate blank that enters finish rolling is carried out cooling fast between frame, and regulation and control enter the intermediate blank temperature of finish rolling, carry out controlled rolling.
4. according to claim 1,2 or 3 described thin steel belt casting and rolling production process, the thickness that it is characterized in that the strip product made from steel is 1-16mm, and width is 600-2200mm; The thickness of pairing continuous casting billet is 70-100mm, and width is 600-2200mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100988110A CN100396391C (en) | 2005-09-01 | 2005-09-01 | Thin steel belt casting and rolling production process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100988110A CN100396391C (en) | 2005-09-01 | 2005-09-01 | Thin steel belt casting and rolling production process |
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| Publication Number | Publication Date |
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| CN1772404A CN1772404A (en) | 2006-05-17 |
| CN100396391C true CN100396391C (en) | 2008-06-25 |
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| CNB2005100988110A Active CN100396391C (en) | 2005-09-01 | 2005-09-01 | Thin steel belt casting and rolling production process |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101596546B (en) * | 2009-07-02 | 2013-04-17 | 盐城市联鑫钢铁有限公司 | Steel rolling production process used in steel production |
| CN101618398B (en) * | 2009-08-06 | 2013-03-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling internal defects of steel |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038955A (en) * | 1988-05-25 | 1990-01-24 | 曼内斯曼股份公司 | Method for continuous cast rolling |
| CN1039370A (en) * | 1988-07-04 | 1990-02-07 | 曼内斯曼股份公司 | The direct casting method of the slab that production is thinner than as-cast condition |
| US5058656A (en) * | 1987-04-13 | 1991-10-22 | Thyssen Stahl Ag | Installation for the production of a steel strip |
| US5307864A (en) * | 1988-05-26 | 1994-05-03 | Mannesmann Aktiengesellschaft | Method and system for continuously producing flat steel product by the continuous casting method |
| WO2000010741A1 (en) * | 1998-08-17 | 2000-03-02 | Voest-Alpine Industrieanlagenbau Gmbh | Method and device for producing a hot-rolled steel strip from molten steel |
| EP1059125A2 (en) * | 1999-06-08 | 2000-12-13 | SMS Demag AG | Method for the manufacture of metal strip |
| CN1304343A (en) * | 1998-04-17 | 2001-07-18 | Sms舒路曼-斯玛公司 | Method and device for continuously casting thin metal strips |
| CN1321112A (en) * | 1998-10-01 | 2001-11-07 | 乔维尼·阿维迪 | Process and relative production line for direct manufacture of finished pressed or deep drawn pieces from ultrathin hot rolled strip cast and rolled in-line |
| CN1475314A (en) * | 2003-07-18 | 2004-02-18 | 钢铁研究总院 | No heating processing method in bar steel continuous casting and continuous rolling process |
-
2005
- 2005-09-01 CN CNB2005100988110A patent/CN100396391C/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5058656A (en) * | 1987-04-13 | 1991-10-22 | Thyssen Stahl Ag | Installation for the production of a steel strip |
| CN1038955A (en) * | 1988-05-25 | 1990-01-24 | 曼内斯曼股份公司 | Method for continuous cast rolling |
| US5307864A (en) * | 1988-05-26 | 1994-05-03 | Mannesmann Aktiengesellschaft | Method and system for continuously producing flat steel product by the continuous casting method |
| CN1039370A (en) * | 1988-07-04 | 1990-02-07 | 曼内斯曼股份公司 | The direct casting method of the slab that production is thinner than as-cast condition |
| CN1304343A (en) * | 1998-04-17 | 2001-07-18 | Sms舒路曼-斯玛公司 | Method and device for continuously casting thin metal strips |
| WO2000010741A1 (en) * | 1998-08-17 | 2000-03-02 | Voest-Alpine Industrieanlagenbau Gmbh | Method and device for producing a hot-rolled steel strip from molten steel |
| CN1321112A (en) * | 1998-10-01 | 2001-11-07 | 乔维尼·阿维迪 | Process and relative production line for direct manufacture of finished pressed or deep drawn pieces from ultrathin hot rolled strip cast and rolled in-line |
| EP1059125A2 (en) * | 1999-06-08 | 2000-12-13 | SMS Demag AG | Method for the manufacture of metal strip |
| CN1475314A (en) * | 2003-07-18 | 2004-02-18 | 钢铁研究总院 | No heating processing method in bar steel continuous casting and continuous rolling process |
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| CN1772404A (en) | 2006-05-17 |
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