CN100418650C - CSP production line cold rolling feed deformation system - Google Patents
CSP production line cold rolling feed deformation system Download PDFInfo
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- CN100418650C CN100418650C CNB2006100483708A CN200610048370A CN100418650C CN 100418650 C CN100418650 C CN 100418650C CN B2006100483708 A CNB2006100483708 A CN B2006100483708A CN 200610048370 A CN200610048370 A CN 200610048370A CN 100418650 C CN100418650 C CN 100418650C
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Abstract
The invention relates to a cold rolling material deformation control method of CSP product line. Wherein, it comprises rough roller compress rate, fine roller compress rate, and total compress rate; the improved R1 rough roller compress rate is 48.5-50.3%. The invention, based on the material feeding demand, via lots of comparison tests and the working ability of roller, can find out optimized parameters, to improve the compress rate of R1 rough roller, to crystallize the austenite completely and improve the ferrite state, to reduce the yield strength of steel band.
Description
Technical field
The present invention relates to a kind of steel rolling process method, particularly CSP production line cold rolling feeding deformation system, belong to metallurgical technical field of steel rolling.
Background technology
Steel rolling is a kind of main machining method in the stress metal processing, produces permanent deformation by rolling strand or the steel ingot of making.Steel rolling can not only make strand or steel ingot produce plastic deformation, can change also that their inside is more loose porous, grain structure is thick and the phenomenon inhomogeneous, that segregation is more serious.The technological parameter of major control has deformation system, temperature schedule etc. in the operation of rolling, reasonably formulates these technological parameters to obtain desired crystal grain and tissue, can make steel obtain needed comprehensive mechanical property.
For hot-strip, deformation system mainly refers to percentage pass reduction and total reduction ratio of the percentage pass reduction of roughing mill and total reduction ratio, finishing mill.The CSP common process is produced mild steel according to finished product thickness difference, R
1The roughing mill reduction ratio is generally 40～46%; Because the roughing mill reduction ratio is less than normal, makes that the reduction ratio of finishing mill is bigger than normal, causes finished product crystal grain thin partially, yield strength is higher.Produce cold rolling feeding for the CSP production line, require to reduce the purpose that the finished product grain size number reaches coarsened grain,, improve percentage elongation, thereby carry out tissue and performance preparation for the cold rolling processing of subsequent handling to reduce yield strength.Obviously, the deformation system that adopts according to common process production is inappropriate, needs to formulate corresponding deformation system, to satisfy CSP production line cold rolling feeding tissue and performance requirement by optimizing parameter.
Summary of the invention
Technical problem to be solved by this invention provides a kind of CSP production line cold rolling feeding deformation system, and this system reaches reduction finished product grain size number, reduces yield strength, improves percentage elongation by optimizing technological parameter, thereby satisfies the following process requirement.
The alleged problem of the present invention is solved by following technical scheme:
A kind of CSP production line cold rolling feeding deformation system, constitute and comprise roughing mill percentage pass reduction and total reduction ratio, finishing mill percentage pass reduction and total reduction ratio, wherein, roughing mill is one-pass roller, its special feature is: described R1 roughing mill percentage pass reduction is 48.5%-50.3%, described finishing mill is that six passages are rolling, wherein, and finishing mill F
1Percentage pass reduction is 43.2-54.5%, finishing mill F
2Percentage pass reduction is 41.5-52.3%, finishing mill F
3Percentage pass reduction is 35.7-44.7%, finishing mill F
6Percentage pass reduction is 16.2-19%.
Above-mentioned CSP production line cold rolling feeding deformation system, described finishing mill F
4And F
5Percentage pass reduction is distributed automatically by computer, generally speaking, and described finishing mill F
4Percentage pass reduction is 28.2-38.6%, finishing mill F
5Percentage pass reduction is 23.1-30.5%.
Above-mentioned CSP production line cold rolling feeding deformation system, the total reduction ratio of described finishing mill is: 90.1%-95.4%.
It is thin partially to the present invention is directed to CSP production line common process production mild steel finished product crystal grain, yield strength is higher, the problem that is unfavorable for cold rolling processing is improved deformation system, by products of different specifications is carried out a large amount of contrast tests, and find out the cold rolling feeding rolling technological parameter of optimization in conjunction with the hands-on background of milling train, it mainly is improved to: under identical deformation temperature and the deformation velocity condition, improve R
1The reduction ratio of roughing mill, austenite recrystallization is abundant when making roughing, improves the austenite form, and then improves the ferrite form, thereby helps to reduce band steel yield strength; In addition, improve R
1The reduction ratio of roughing mill can reduce total reduction ratio of finishing mill, and then reduces the accumulation reduction ratio in finishing mill non-recrystallization district, makes the degree of crystal grain thinning alleviate, and the result reduces band steel yield strength, improves percentage elongation.
Description of drawings
Fig. 1 is that the CSP apparatus for production line is arranged schematic diagram.
Each label is among the figure: 1. conticaster; 2. heating furnace; 3. descaling mill; 4. edger roll; 5.R roughing mill; 6. soaking pit; 7. accident is cut; 8. descaling mill; 9.F
1Finishing mill; 10.F
2Finishing mill; 11.F
3Finishing mill; 12.F
4Finishing mill; 13.F
5Finishing mill; 14.F
6Finishing mill; 15. measuring chamber; 16. laminar flow cooling; 17. runout table; 18.1
#Coiling machine; 19.2
#Coiling machine.
The specific embodiment
Referring to Fig. 1, the setting of CSP production line roughing mill 5 of the present invention and finishing mill 9～14 is as figure.In the CSP common process is produced, according to the difference of mild steel finished product thickness, R
1The reduction ratio of roughing mill 5 is 40～46%, because the roughing mill reduction ratio is less than normal, makes that the reduction ratio of finishing mill is bigger than normal, thereby cause finished product crystal grain thin partially that yield strength is higher.Main improvement of the present invention is, should suitably reduce band steel yield strength according to cold rolling feeding, the requirement that improves the product percentage elongation, and the control deformation system wherein mainly is to increase R
1The reduction ratio of roughing mill can improve the austenite form, and then improve the ferrite form so that austenite recrystallization is abundant like this, helps to reduce yield strength; Can reduce total reduction ratio of finishing mill again, promptly reduce the accumulation reduction ratio in finishing mill non-recrystallization district, make the degree of crystal grain thinning alleviate, its result reaches and reduces the finished product grain size number, reduces yield strength, improves the purpose of percentage elongation.
The quantitative relationship of the total reduction ratio of finishing mill and each percentage pass reduction is as follows:
ε
Always=1-(1-ε
1) (1-ε
2) (1-ε
3) (1-ε
4) (1-ε
5) (1-ε
6) ε in the formula
AlwaysBe the total reduction ratio of finishing mill, ε
1～ε
6Percentage pass reduction for each finishing mill.
Provide several products below under the essentially identical condition of other technology, R
1The different reduction ratio contrast of roughing mill information slip:
Table 1: product chemical composition
| Numbering | C％ | Si％ | Mn％ | P％ | S％ | Als％ |
| 1 | 0.06 | 0.02 | 0.29 | 0.007 | 0.009 | 0.0319 |
| 2 | 0.05 | 0.04 | 0.27 | 0.006 | 0.009 | 0.0627 |
| 3 | 0.04 | 0.05 | 0.27 | 0.009 | 0.004 | 0.0408 |
| 4 | 0.04 | 0.02 | 0.25 | 0.013 | 0.005 | 0.0308 |
Table 2: technological parameter
| Numbering | Come out of the stove steel temperature ℃ of soaking pit | R 1Roughing mill reduction ratio % | Finishing temperature ℃ | Coiling temperature ℃ |
| 1 | 1062 | 50 | 860 | 630 |
| 2 | 1048 | 42.9 | 860 | 630 |
| 3 | 1050 | 50 | 860 | 630 |
| 4 | 1050 | 48.6 | 860 | 630 |
Table 3: mechanical property
| Numbering | Specification (mm) | Yield strength (MPa) | Tensile strength (Mpa) | Percentage elongation % |
| 1 | 2.75 | 300 | 390 | 42 |
| 2 | 3.5 | 320 | 405 | 42 |
| 3 | 3.0 | 295 | 385 | 44 |
| 4 | 3.0 | 300 | 385 | 43 |
Table 4: metal lographic examination
| Numbering | Specification (mm) | Tissue | Grain size number |
| 1 | 2.75 | F+P | 8.5 |
| 2 | 3.5 | F+ |
9 |
| 3 | 3.0 | F+P | 8.5 |
| 4 | 3.0 | F+P | 8.5 |
From last table, can find out 1
#Sample, 2
#Sample, 3
#Sample, 4
#The sample chemical composition change is little, and process conditions are the same substantially, and different is 2
#Sample R1 roughing mill reduction ratio is littler than other 3 samples, and as a result 2
#The sample grain size number is 9 grades, and other 3 sample grain size numbers are 8.5 grades; Mechanical property test shows 2
#Sample tensile strength and yield strength are apparently higher than other 3 samples.In addition, can find out 2 from metallograph
#Sample organizes in the photo ferrite form to organize in the photo ferrite poor than other three samples.Above-mentioned test explanation increases R
1The reduction ratio of roughing mill helps the alligatoring of finished strip ferrite crystal grain, helps simultaneously improving its form, and band steel yield strength is reduced, and percentage elongation improves.But, limited by appointed condition, R1 roughing mill reduction ratio can not unrestrictedly improve, and the package situation considers that it is suitable that R1 roughing mill reduction ratio is set 48.5%-50.3%.
Along with the roughing mill reduction ratio improves, the finishing mill reduction ratio also will be made corresponding adjustment, and in the finish rolling process, the belt steel temperature height possessed the condition that crystallization again takes place when several rolling mills in front were rolling; Belt steel temperature was low when several rolling mills in back were rolling, and it is rolling to belong to non-recrystallization.To reduce finished product grain size number coarsened grain in order reaching, thereby to reduce yield strength, improve the purpose of percentage elongation, should make the distortion reach as far as possible, make on the one hand crystallization more fully takes place when crystallization is rolling again, improve the preceding austenite form of phase transformation, and then improve the ferrite form; Reduce the Strain Accumulation in the non-recrystallization operation of rolling on the other hand, make the degree of crystal grain thinning alleviate, reduce band steel yield strength, improve the purpose of percentage elongation to reach.Therefore, the finishing mill reduction ratio successively decreases from front to back.
Below provide several reduction ratio embodiment:
| Embodiment | R 1Frame % | The total reduction ratio % of finishing mill | F 1Frame % | F 2Frame % | F 3Frame % | F 4Frame % | F 5Frame % | F 6Frame % |
| 1 | 50.2 | 95.4 | 53.8 | 50.4 | 44.7 | 38.4 | 27.1 | 18.5 |
| 2 | 50.3 | 95.4 | 53.8 | 52.1 | 44.7 | 35.1 | 28.4 | 18.6 |
| 3 | 50.1 | 95.4 | 53.6 | 51.9 | 44.5 | 35.2 | 29.3 | 18.3 |
| 4 | 50.1 | 95.4 | 53.6 | 51.7 | 44.6 | 35.6 | 29.2 | 18.1 |
| 5 | 49.2 | 95.4 | 54.5 | 50.3 | 43.0 | 38.6 | 27.8 | 19.0 |
| 6 | 49.7 | 94.8 | 52.4 | 52.2 | 39.7 | 33.8 | 30.3 | 18.4 |
| 7 | 49.7 | 94.8 | 52.4 | 52.2 | 39.8 | 33.7 | 30.2 | 18.4 |
| 8 | 49.7 | 94.8 | 52.4 | 52.1 | 39.8 | 33.7 | 30.5 | 18.3 |
| 9 | 49.7 | 94.8 | 52.5 | 52.3 | 39.7 | 33.9 | 30.1 | 18.4 |
| 10 | 49.8 | 94.8 | 52.4 | 52.2 | 39.7 | 33.9 | 30.2 | 18.5 |
| 11 | 49.7 | 93.5 | 48.9 | 48.7 | 38.3 | 33.6 | 27.0 | 17.7 |
| 12 | 49.7 | 93.5 | 48.7 | 48.6 | 38.1 | 33.8 | 27.0 | 17.9 |
| 13 | 49.7 | 93.5 | 49.3 | 49.1 | 37.0 | 33.9 | 27.2 | 17.3 |
| 14 | 49.7 | 93.5 | 49.3 | 49.1 | 37.2 | 33.8 | 27.2 | 17.3 |
| 15 | 49.7 | 93.5 | 49.3 | 49.1 | 37.2 | 33.8 | 27.3 | 17.0 |
| 16 | 49.7 | 92.9 | 48.2 | 43.0 | 40.4 | 33.0 | 27.0 | 17.4 |
| 17 | 49.7 | 92.9 | 48.1 | 43.0 | 40.2 | 33.0 | 27.3 | 17.3 |
| 18 | 49.7 | 92.9 | 48.4 | 43.2 | 40.4 | 33.1 | 26.3 | 17.3 |
| 19 | 49.7 | 92.9 | 47.7 | 45.7 | 36.1 | 33.5 | 28.3 | 17.8 |
| 20 | 49.7 | 92.9 | 47.1 | 46.3 | 39.0 | 33.2 | 25.3 | 17.6 |
| 21 | 48.5 | 92.4 | 47.0 | 42.0 | 39.3 | 33.0 | 26.9 | 17.0 |
| 22 | 48.5 | 92.4 | 47.1 | 41.9 | 39.4 | 33.1 | 26.8 | 16.9 |
| 23 | 48.5 | 92.4 | 47.0 | 42.0 | 39.4 | 33.0 | 26.8 | 17.0 |
| 24 | 48.5 | 92.4 | 47.0 | 41.9 | 39.4 | 33.0 | 26.9 | 17.0 |
| 25 | 48.5 | 92.4 | 47.1 | 42.0 | 39.4 | 33.0 | 26.9 | 16.9 |
| 26 | 49.8 | 90.9 | 44.4 | 42.7 | 36.8 | 28.9 | 23.7 | 16.8 |
| 27 | 48.5 | 91.1 | 45.9 | 42.3 | 36.1 | 29.4 | 24.7 | 16.2 |
| 28 | 48.5 | 91.1 | 43.7 | 42.7 | 37.9 | 29.5 | 24.3 | 17.1 |
| 29 | 48.5 | 90.4 | 43.6 | 41.9 | 36.0 | 28.4 | 23.3 | 16.4 |
| 30 | 49.7 | 90.1 | 43.2 | 41.5 | 35.7 | 28.2 | 23.1 | 16.4 |
Claims (3)
1. CSP production line cold rolling feeding deformation system, formation comprises roughing mill percentage pass reduction and total reduction ratio, finishing mill percentage pass reduction and total reduction ratio, and wherein, roughing mill is one-pass roller, it is characterized in that: described roughing mill (5) reduction ratio is 48.5-50.3%, finishing mill F
1(9) percentage pass reduction is: 43.2-54.5%, finishing mill F
2(10) percentage pass reduction is: 41.5-52.3%, finishing mill F
3(11) percentage pass reduction is: 35.7-44.7%, finishing mill F
6(14) percentage pass reduction is: 16.2-19%.
2. CSP production line cold rolling feeding deformation system according to claim 1 is characterized in that: described finishing mill F
4(12) percentage pass reduction is 28.2-38.6%, finishing mill F
5(13) percentage pass reduction is 23.1-30.5%.
3. CSP production line cold rolling feeding deformation system according to claim 1 is characterized in that: the total reduction ratio of described finishing mill is: 90.1-95.4%.
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|---|---|---|---|
| CNB2006100483708A CN100418650C (en) | 2006-09-29 | 2006-09-29 | CSP production line cold rolling feed deformation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100483708A CN100418650C (en) | 2006-09-29 | 2006-09-29 | CSP production line cold rolling feed deformation system |
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| CN1927484A CN1927484A (en) | 2007-03-14 |
| CN100418650C true CN100418650C (en) | 2008-09-17 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5584207A (en) * | 1978-12-20 | 1980-06-25 | Nippon Steel Corp | Rolling equipment row of hot strip |
| EP0327854A2 (en) * | 1988-02-06 | 1989-08-16 | Sms Schloemann-Siemag Aktiengesellschaft | Method of and installation for rolling strips casted in a continuous strip casting installation |
| CN1088491A (en) * | 1992-10-28 | 1994-06-29 | Sms舒路曼-斯玛公司 | Make the method and apparatus of hot-strip from the blank of continuous pouring |
| CN1195584A (en) * | 1997-04-10 | 1998-10-14 | 丹尼利机械设备股份公司 | Rolling method for thin flat products and relative rolling line |
| CN1207965A (en) * | 1997-06-16 | 1999-02-17 | Sms舒路曼－－斯玛公司 | Method and equipment for rolling hot-rolling wide strip steel in small sized strip steel production equipment |
| CN1446129A (en) * | 2000-08-05 | 2003-10-01 | Sms迪马格股份公司 | Method and installation for producing thin flat products |
| CN1618539A (en) * | 2004-10-25 | 2005-05-25 | 广州珠江钢铁有限责任公司 | Method for using hot-rolled steel plate to produce and steel cylinder by using continuously casting and rolling thin steel blanket |
| CN1785543A (en) * | 2005-08-31 | 2006-06-14 | 广州珠江钢铁有限责任公司 | Technology of producing Ti micro alloyed high weather resistant steel plate using thin plate blank continuous casting continuous milling process |
-
2006
- 2006-09-29 CN CNB2006100483708A patent/CN100418650C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5584207A (en) * | 1978-12-20 | 1980-06-25 | Nippon Steel Corp | Rolling equipment row of hot strip |
| EP0327854A2 (en) * | 1988-02-06 | 1989-08-16 | Sms Schloemann-Siemag Aktiengesellschaft | Method of and installation for rolling strips casted in a continuous strip casting installation |
| CN1088491A (en) * | 1992-10-28 | 1994-06-29 | Sms舒路曼-斯玛公司 | Make the method and apparatus of hot-strip from the blank of continuous pouring |
| CN1195584A (en) * | 1997-04-10 | 1998-10-14 | 丹尼利机械设备股份公司 | Rolling method for thin flat products and relative rolling line |
| CN1207965A (en) * | 1997-06-16 | 1999-02-17 | Sms舒路曼－－斯玛公司 | Method and equipment for rolling hot-rolling wide strip steel in small sized strip steel production equipment |
| CN1446129A (en) * | 2000-08-05 | 2003-10-01 | Sms迪马格股份公司 | Method and installation for producing thin flat products |
| CN1618539A (en) * | 2004-10-25 | 2005-05-25 | 广州珠江钢铁有限责任公司 | Method for using hot-rolled steel plate to produce and steel cylinder by using continuously casting and rolling thin steel blanket |
| CN1785543A (en) * | 2005-08-31 | 2006-06-14 | 广州珠江钢铁有限责任公司 | Technology of producing Ti micro alloyed high weather resistant steel plate using thin plate blank continuous casting continuous milling process |
Non-Patent Citations (2)
| Title |
|---|
| 邯钢CSP工艺过程钢中夹杂物热力学分析与研究. 张文，吝章国，张梅，李向奎，杨林浩，孙洪利，王习东.中国冶金，第16卷第6期. 2006 |
| 邯钢CSP工艺过程钢中夹杂物热力学分析与研究. 张文，吝章国，张梅，李向奎，杨林浩，孙洪利，王习东.中国冶金，第16卷第6期. 2006 * |
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