CN107695111A - A kind of method for mitigating hot-strip curvature of the spinal column defect - Google Patents
A kind of method for mitigating hot-strip curvature of the spinal column defect Download PDFInfo
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- CN107695111A CN107695111A CN201711044764.0A CN201711044764A CN107695111A CN 107695111 A CN107695111 A CN 107695111A CN 201711044764 A CN201711044764 A CN 201711044764A CN 107695111 A CN107695111 A CN 107695111A
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- coil
- stacking
- spinal column
- steel
- strip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/002—Piling, unpiling, unscrambling
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- Mechanical Engineering (AREA)
- Heat Treatment Of Steel (AREA)
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Abstract
The invention discloses a kind of method for mitigating hot-strip curvature of the spinal column defect, belong to hot-strip manufacturing process technology field, there is provided a kind of stacking cooling procedure of the coil by being formed after hot strip rolling to be controlled, significantly to control the generation of curvature of the spinal column defect, reduce amount of warpage；Production cost can be reduced simultaneously, and methods described is that following stacking distribution mode is used in stacking region：In same row stacking coil of the same race；In the specific distribution mode arrangement of carry out such as the more different coil types of the coil of same row's stacking and thickness.Specific Temperature Distribution and radiating distribution situation can be formed in stacking region, thickness i.e. closer to the coil at middle part is thicker, it so may be such that cooling procedure of the bigger coil of thickness after stacking is slower, and then the situation that larger curvature of the spinal column defect occurs in cooling procedure can be mitigated, to reduce amount of warpage.
Description
Technical field
The present invention relates to hot-strip manufacturing process technology field, more particularly to a kind of hot-strip curvature of the spinal column defect that mitigates
Method.
Background technology
Hot-strip not only requires accurate dimensional accuracy, but also requires possess preferable glacing flatness.It is but hot
Strip is rolled during cold rear uncoiling, and the phenomenon for curvature of the spinal column defect occur is very universal.With hot-strip intensity and thickness
Increase, curvature of the spinal column defect problem can show more obvious, i.e.,：Amount of warpage can increase.For hot rolling acid-cleaning plate or cold rolling material, tool
The strip for having curvature of the spinal column defect will scratch roll surface and strip its own face, Jin Erzeng during continuing process uncoiling after entering
Add the reconditioning number and infringement strip surface quality of roll, cause larger economic loss.And for being directly used in downstream user
Strip, the problems such as subsequent forming process difficulty is big, final product quality is poor will be caused.At present, the solution method of curvature of the spinal column defect problem
Mainly by coming into operation, straightener is aligned, and this undoubtedly adds production cost, and for the serious strip of part curvature of the spinal column defect,
Also roll can not be bitten.
The content of the invention
Present invention solves the technical problem that it there is provided a kind of stacking cooling of coil by being formed after hot strip rolling
Process is controlled, and so that the generation of curvature of the spinal column defect problem is greatly reduced, reduces amount of warpage；Production cost can be reduced simultaneously.
The technical solution adopted for the present invention to solve the technical problems is：A kind of side for mitigating hot-strip curvature of the spinal column defect
Method, following stacking distribution mode is used in stacking region：
In same row stacking coil of the same race；
Same row's stacking coil according to A-B-A, A-B-B-A, A-B-C-B-A, A-B-C-C-B-A, A-B-C-D-C-
B-A、A-B-C-D-D-C-B-A、A-C-A、A-C-C-A、A-C-D-C-A、A-C-D-D-C-A、A-D-A、A-D-D-A、B-C-B、
B-C-C-B, B-C-D-C-B, B-C-D-D-C-B, B-D-B, B-D-D-B, C-D-C or C-D-D-C distribution mode are arranged, wherein A
For ultra-low-carbon steel or micro- carbon steel, B is Thin Specs carbon steel or micro alloyed steel；C is medium format carbon steel or low-alloy
High strength steel；D is think gauge carbon steel, micro alloyed steel, pipe line steel or weathering steel.
It is further：The diameter parallel of each coil in same row；The axis of each coil in same row
In the same direction.
It is further：When carrying out finish rolling to strip, on the premise of ensureing to occur without shape wave, smaller finish rolling is used as far as possible
Export roll thermal crown.
It is further：Finish rolling outlet roll thermal crown is 30 μm~60 μm.
The beneficial effects of the invention are as follows：Method of the present invention, can by using the coil stacking mode of specific arrangements
Specific Temperature Distribution and radiating distribution situation are formed in stacking region, i.e. the thickness closer to the coil at middle part is thicker,
So may be such that cooling procedure of the bigger coil of thickness after stacking is slower, so can mitigate in cooling procedure occur compared with
The situation of big curvature of the spinal column defect, reduces amount of warpage.In addition, by the cooling situation of every volume coil itself, the cooling at its axial both ends
Speed, and circumferential cooling velocity is slower, is so set by making the diameter parallel of each coil in same row, simultaneously
The axis of each coil in same row is set in the same direction, whole stacking area can be further ensured in the case where facilitating stacking
The cooling effect of interior coil.In addition, in order to further mitigate curvature of the spinal column defect problem, method of the present invention can not ensure
On the premise of existing shape wave (such as side unrestrained or middle wave), further in finishing stands are carried out to strip, smaller finish rolling is used as far as possible
Export roll thermal crown；According to actual conditions, it can typically accomplish that corresponding finish rolling exports roll thermal crown at 30 μm~60 μm, can so enter
One step mitigates the problem of curvature of the spinal column defect occurs for strip.
Brief description of the drawings
Fig. 1 is in a kind of method for mitigating hot-strip curvature of the spinal column defect of the present invention, and coil stacking distribution is shown
It is intended to；
Fig. 2 is the coil stacking distribution schematic diagram after simplifying in Fig. 1.
Embodiment
The present invention is further described with reference to the accompanying drawings and detailed description.
As shown in Fig. 1 to Fig. 2, a kind of method for mitigating hot-strip curvature of the spinal column defect of the present invention, for by right
The coil formed after belt steel rolling uses specific stacking distribution mode, to realize that the control to coil cooling procedure subtracts to reach
The curvature of the spinal column defect problem of strip after saddening system；Specifically stacking distribution mode is：
In same row stacking coil of the same race；
Same row's stacking coil according to A-B-A, A-B-B-A, A-B-C-B-A, A-B-C-C-B-A, A-B-C-D-C-
B-A、A-B-C-D-D-C-B-A、A-C-A、A-C-C-A、A-C-D-C-A、A-C-D-D-C-A、A-D-A、A-D-D-A、B-C-B、
B-C-C-B, B-C-D-C-B, B-C-D-D-C-B, B-D-B, B-D-D-B, C-D-C or C-D-D-C distribution mode are arranged, wherein A
For ultra-low-carbon steel or micro- carbon steel, B is Thin Specs carbon steel or micro alloyed steel；C is medium format carbon steel or low-alloy
High strength steel；D is think gauge carbon steel, micro alloyed steel, pipe line steel or weathering steel.
As shown in Figure 1, it carries out stacking distribution in the coil of same row's stacking in the way of A-B-C-C-B-A.
Certainly, without loss of generality, in the case where the coil of same row's stacking meets that both ends coil is relatively thin, middle coil is thicker, also may be used
Other stacking distribution modes are used according to actual conditions, for example with A-B-B-C-C-B-B-A stacking distribution mode.
Furthermore, it is contemplated that often rolling up the cooling situation of coil itself, the cooling velocity at its axial both ends is very fast, and circumference is cold
But speed is slower.Therefore, the diameter parallel of each coil in same row is further set in the present invention, while positioned at same
The axis of each coil in row is in the same direction；Specifically as shown in Figure 1.Such benefit be can make to be located at it is of the same race in same row
The cooling velocity of coil is very fast and consistent, while between the coil not of the same race on same row, positioned at the cold of middle coil
But the cooling velocity of coil of the speed compared with slow and positioned at both ends is very fast；So again by the cooling situation of coil not of the same race respectively with it is right
After the belt steel thickness or belt steel material answered be combined with each other, coil not of the same race can be mitigated respectively the curvature of the spinal column occurs in cooling procedure and lack
Sunken situation.
In addition, the present invention can also be realized and further mitigated by the control to the outlet roll thermal crown of strip in finishing stands
The problem of curvature of the spinal column defect, occurs for strip；Specifically, it is in feelings such as rolling equipment, belt steel material and the belt steel thickness according to reality
Under condition, meet as far as possible when carrying out finish rolling to strip, on the premise of ensureing to occur without shape wave (such as side unrestrained or middle wave), as far as possible
Roll thermal crown is exported using less finish rolling；Such as settable finish rolling outlet roll thermal crown is 20 μm~60 μm, more preferably 30 μm
~60 μm；Relative in original finish-rolling process, generally require set finish rolling export roll thermal crown be 80 μm~100 μm for, can
Substantially it is reduced to the 1/4~3/4 of original roll thermal crown value；So it can reduce follow-up strip as far as possible and occur the curvature of the spinal column in cooling procedure and lack
Sunken situation.
Specific embodiment 1
By taking 7.5mm × 1500mm middle titanium Q345B hot-strips as an example, respectively by using original process method and this hair
Bright methods described carries out contrast test, to illustrate specific implementation of the patent process and effect.The coils of volume two are selected to be contrasted
(original process is carried out using random stacking by (80 μm) the progress finish rolling rollings of normal roll thermal crown and cooling for experiment, the wherein first volume
Cooling)；The roll thermal crown that finish rolling rolls is reduced to 30 μm by volume Two from original 80 μm；It is and cold by A-B-C-B-A mode stackings
But, wherein：A specific steel grade is DC03；B specific steel grade is the thick Q235B of 3.5mm；C is experiment coil.
According to above-mentioned specific embodiment, on-the-spot test is carried out to 7.5mm × 1500mm middle titanium Q345B, after cooling down uncoiling
Curvature of the spinal column warpage measurements are as shown in table 1：
Curvature of the spinal column warpage value (unit in table 1 after titanium Q345B coolings：mm)
Specific embodiment 2
By taking 8mm × 1550mm beam steel (P510L) as an example, respectively by using original process method with it is of the present invention
Method carries out contrast test, to illustrate specific implementation of the patent process and effect.The coils of volume two are selected to carry out contrast test, its
The middle first volume carries out finish rolling rolling and the cooling of random stacking for (105 μm) by normal roll thermal crown；Volume Two rolls finish rolling hot convex
Degree is by 55 μm of controls；And cooled down by A-B-C-C-B-A modes stacking, wherein：A specific steel grade is DC02；B specific steel grade is
Q345B thick 5.5mm；C is experiment coil.
According to above-mentioned specific embodiment, on-the-spot test is carried out to 8mm × 1550mm beam steel (P510L), cools down uncoiling
Curvature of the spinal column warpage measurements are as shown in table 2 afterwards：
Curvature of the spinal column warpage value (unit after the beam steel of table 2 (P510L) cooling：mm)
It is visible by above-mentioned specific embodiment, using the method for the invention, it can significantly control the curvature of the spinal column defect of strip
Situation occurs, while can reduce amount of warpage, improves belt steel product quality.
Claims (4)
- A kind of 1. method for mitigating hot-strip curvature of the spinal column defect, it is characterised in that：It is distributed in stacking region using following stacking Mode：In same row stacking coil of the same race；Same row's stacking coil according to A-B-A, A-B-B-A, A-B-C-B-A, A-B-C-C-B-A, A-B-C-D-C-B-A, A-B-C-D-D-C-B-A、A-C-A、A-C-C-A、A-C-D-C-A、A-C-D-D-C-A、A-D-A、A-D-D-A、B-C-B、B-C- C-B, B-C-D-C-B, B-C-D-D-C-B, B-D-B, B-D-D-B, C-D-C or C-D-D-C distribution mode are arranged, and wherein A is super Mild steel or micro- carbon steel, B are Thin Specs carbon steel or micro alloyed steel；C is medium format carbon steel or low-alloy high-strength Spend steel；D is think gauge carbon steel, micro alloyed steel, pipe line steel or weathering steel.
- A kind of 2. method for mitigating hot-strip curvature of the spinal column defect as claimed in claim 1, it is characterised in that：In same row Each coil diameter parallel；The axis of each coil in same row is in the same direction.
- A kind of 3. method for mitigating hot-strip curvature of the spinal column defect as claimed in claim 1 or 2, it is characterised in that：Strip is entered During row finish rolling, on the premise of ensureing to occur without shape wave, as far as possible using smaller finish rolling outlet roll thermal crown.
- A kind of 4. method for mitigating hot-strip curvature of the spinal column defect as claimed in claim 3, it is characterised in that：Finish rolling outlet heat is convex Spend for 30um~60um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711044764.0A CN107695111B (en) | 2017-10-31 | 2017-10-31 | Method for reducing defects of turtle backs of hot-rolled strip steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711044764.0A CN107695111B (en) | 2017-10-31 | 2017-10-31 | Method for reducing defects of turtle backs of hot-rolled strip steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107695111A true CN107695111A (en) | 2018-02-16 |
| CN107695111B CN107695111B (en) | 2020-03-17 |
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| CN201711044764.0A Active CN107695111B (en) | 2017-10-31 | 2017-10-31 | Method for reducing defects of turtle backs of hot-rolled strip steel |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU719734A1 (en) * | 1978-01-11 | 1980-03-05 | Институт черной металлургии | Device for adjusting the stack of rolled stock on coiling apparatus |
| CN201172689Y (en) * | 2008-04-10 | 2008-12-31 | 上海宝钢工程技术有限公司 | Minor diameter anticrease roller of decoiler |
| CN202762883U (en) * | 2012-09-20 | 2013-03-06 | 泰安华鲁锻压机床有限公司 | Steel plate stacking machine |
| CN106734198A (en) * | 2016-12-13 | 2017-05-31 | 山东钢铁股份有限公司 | A kind of system and method that can improve reversing cold mill lumber recovery |
-
2017
- 2017-10-31 CN CN201711044764.0A patent/CN107695111B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU719734A1 (en) * | 1978-01-11 | 1980-03-05 | Институт черной металлургии | Device for adjusting the stack of rolled stock on coiling apparatus |
| CN201172689Y (en) * | 2008-04-10 | 2008-12-31 | 上海宝钢工程技术有限公司 | Minor diameter anticrease roller of decoiler |
| CN202762883U (en) * | 2012-09-20 | 2013-03-06 | 泰安华鲁锻压机床有限公司 | Steel plate stacking machine |
| CN106734198A (en) * | 2016-12-13 | 2017-05-31 | 山东钢铁股份有限公司 | A kind of system and method that can improve reversing cold mill lumber recovery |
Non-Patent Citations (1)
| Title |
|---|
| 路素娟: "冷却和堆垛对钢板翘曲的影响", 《宽厚板》 * |
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| CN107695111B (en) | 2020-03-17 |
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Effective date of registration: 20220624 Address after: 610306 Chengdu City, Chengdu, Sichuan, China (Sichuan) free trade test zone, Chengdu City, Qingbaijiang District, xiangdao Boulevard, Chengxiang Town, No. 1509 (room 13, A District, railway port mansion), room 1319 Patentee after: Chengdu advanced metal material industry technology Research Institute Co.,Ltd. Patentee after: Panzhihua Iron and Steel Group Panzhihua iron and Steel Research Institute Co., Ltd. Address before: 617000 Taoyuan street, East District, Panzhihua, Sichuan Province, No. 90 Patentee before: PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE Co.,Ltd. |