CN107442756A - The method for improving slab slighter compress efficiency - Google Patents
The method for improving slab slighter compress efficiency Download PDFInfo
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- CN107442756A CN107442756A CN201710601785.1A CN201710601785A CN107442756A CN 107442756 A CN107442756 A CN 107442756A CN 201710601785 A CN201710601785 A CN 201710601785A CN 107442756 A CN107442756 A CN 107442756A
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- Prior art keywords
- slighter compress
- gap
- slab
- roll
- section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of method for improving slab slighter compress efficiency, including the continuous casting machine roll-gap is measured, according to measurement result by 0 section 2 sections of roll gap precision controlling in the range of the 0.5 to 0mm of the first setting value；The continuous casting machine roll-gap is measured, 1 section of roll gap precision before 3 sections of slighter compress is controlled according to measurement result；The continuous casting machine roll-gap is measured, 2 or 3 section roll gap precision implementing slighter compress will be controlled according to measurement result；The continuous casting machine roll-gap is measured, 1 section of 14 sections of roll gap precision after slighter compress are controlled according to measurement result.The method provided by the invention for improving slighter compress efficiency, efficiently solves the shortcomings that traditional slighter compress technique reduction ratio is limited, improves central segregation of slab, while reduce the generation of underbead crack so that end product quality is significantly improved.
Description
Technical field
The present invention relates to iron and steel smelting technology field, more particularly to a kind of method for improving slab slighter compress efficiency.
Background technology
Slighter compress technique is one of control maximally effective means of central segregation of slab, and its principle is to solidify end at slab center
Extra pressure is given in end mushy zone, smashes the crystal boundary at this and puts up a bridge, makes the concentrated phase liquid-phase reflux of solute element, and supplement
Solidification shrinkage at this, so as to improve center segregation and it is loose the defects of.
But with raising of the client to Require for Steel Material, especially high-grade pipe line steel, medium carbon alloy steel and high-strength steel
It is also stricter Deng requirement of the steel grade to central segregation of slab.As shown in figure 1, wherein 1-1 is solidification Bear-grudge shells, liquid centered on 1-2
Phase region, 1-3 are light depression force, and 1-4 inner arc rollers, 1-5 is slab trigonum, and 1-6 is outer arc roller, due to current slighter compress work
Skill drafts is limited, when reduction ratio is more than 1.2mm/m, in slab trigonum 1-5 and close slab trigonum 1-5 position
The probability that portion crackle occurs significantly increases, and analyzing its reason is mainly, slab trigonum 1-5 and attached when slab reaches slighter compress section
Near molten steel solidifies completely, and deflection during pressure at this is limited, and depressing force is mainly acted at this, when drafts is excessive
When this at most easily it is cracked.
Therefore, traditional soft reduction technique can not meet the demand of the high-end product high to center segregation requirement.How
The pressure efficiency of slighter compress technique is improved, had both ensured the control requirement of center segregation, it is this that and can, which avoids underbead crack,
Secondary technical research emphasis.
The content of the invention
The embodiment of the present application solves traditional in the prior art by providing a kind of method for improving slab slighter compress efficiency
The shortcomings that slighter compress technique reduction ratio is limited, central segregation of slab is improved, while reduce the generation of underbead crack.
In order to solve the above technical problems, the invention provides a kind of method for improving slab slighter compress efficiency, including：
Before conticaster is opened and poured, the composition of cast steel grade, casting specification, pulling rate are input to the conticaster simulation and poured
In casting system, the position of solidification end mushy zone in the conticaster casting cycle is determined, records the position of slighter compress reduction section
Parameter and pressure range length；
The continuous casting machine roll-gap is measured, set 0 section -2 sections of roll gap precision controlling first according to measurement result
- the 0.5 of definite value is in the range of 0mm；
The continuous casting machine roll-gap is measured, 1 section of roll gap precision before 3 sections-slighter compress entered according to measurement result
Row control；
The continuous casting machine roll-gap is measured, according to measurement result by 2 or 3 section roll gap of implementation slighter compress
Precision is controlled；
The continuous casting machine roll-gap is measured, 1 section of -14 sections of roll gap precision after slighter compress carried out according to measurement result
Control.
Further, the continuous casting machine roll-gap is measured, according to measurement result by 1 section of roller before 3 sections-slighter compress
Precision controlling is stitched in the range of the 0 to+0.5mm of the second setting value.
Further, the continuous casting machine roll-gap is measured, according to measurement result by 2 or 3 of implementation slighter compress
Individual section roll gap precision controlling is in the range of-the 0.5 to 0mm of the 3rd setting value.
Further, the continuous casting machine roll-gap is measured, according to measurement result by 1 section of -14 sections of roller after slighter compress
Precision controlling is stitched in the range of ± the 0.5mm of the 4th setting value.
Further, the method for described raising slab slighter compress efficiency, in addition to：
The continuous casting machine roll-gap after adjustment is measured again and veritified.
Further, first setting value is a fixed value.
Further, second setting value is a fixed value.
Further, the 3rd setting value is a fixed value.
Further, the 4th setting value is a fixed value.
The one or more technical schemes provided in the embodiment of the present application, have at least the following technical effects or advantages：
The application is by the control to roll gap, and the interior big face of outer arc forms slight when the solidified shell is reached slighter compress section
Bulge, now slighter compress can preferably act on center solid-liquid two-phase region, improve the efficiency of slighter compress, while reduce to three
The pressure of angular region solidified shell, effectively prevent the generation of the position underbead crack, and this method is simple to operate, it is not necessary to equipment
Transformed, it is obvious to lifting slab mass effect.
Brief description of the drawings
Fig. 1 is the pressure process schematic in conventional slighter compress technique.
Fig. 2 is the FB(flow block) of the method for the raising slab slighter compress efficiency that the embodiment of the present application one provides.
Fig. 3 is the pressure process schematic in the method for the raising slab slighter compress efficiency that the embodiment of the present application one provides.
Embodiment
The invention provides a kind of method for improving slighter compress efficiency, efficiently solving traditional slighter compress technique reduction ratio has
The shortcomings that limit, central segregation of slab is improved, while reduce the generation of underbead crack so that end product quality obtains significantly
Lifting.
In order to be better understood from above-mentioned technical proposal, below in conjunction with Figure of description and specific embodiment to upper
Technical scheme is stated to be described in detail.
Embodiment one
As shown in Fig. 2 the embodiment of the present application provides a kind of method for improving slab slighter compress efficiency, including：
Step S1：Before conticaster is opened and poured, the composition of cast steel grade, casting specification, pulling rate are input to conticaster mould
Intend in casting system, determine the position of solidification end mushy zone in conticaster casting cycle, record the position of slighter compress reduction section
Parameter and pressure range length；
Step S2：Continuous casting machine roll-gap is measured, according to measurement result by 0 section -2 sections of roll gap precision (actual roll gap
Value-standard gap values between rollers) control is in the range of-the 0.5 to 0mm of the first setting value, wherein the first setting value is a fixed value.
Step S3：Continuous casting machine roll-gap is measured, according to measurement result to 1 section of roll gap precision before 3 sections-slighter compress
It is controlled, control range is in the range of the 0 to+0.5mm of the second setting value, wherein the second setting value is a fixed value.
Step S4：Continuous casting machine roll-gap is measured, according to measurement result by 2 or 3 sections of implementation slighter compress
Roll gap precision is controlled, by implement 2 of slighter compress or 3 section roll gap precision controllings the 3rd setting value -0.5 to
In the range of 0mm, wherein the 3rd setting value is a fixed value.
Step S5：Continuous casting machine roll-gap is measured, according to measurement result to 1 section of -14 sections of roll gap precision after slighter compress
It is controlled, by 1 section of -14 sections of roll gap precision controlling after slighter compress in the range of the ± 0.5mm of the 4th setting value, wherein the
Four setting values are a fixed value.
Step S6：Continuous casting machine roll-gap after adjustment is measured again and veritified, if roll gap precision is not up to above-mentioned mark
Standard, it is necessary to be veritified, until veritifying result reaches what is required in step S3-S5 again after being adjusted according to step S3-S5
Roll gap precision.
The one or more technical schemes provided in the embodiment of the present application, have at least the following technical effects or advantages：
1st, in order to control the bulge deformation of slab initial solidification shell, continuous casting machine roll-gap is measured, according to measurement result pair
The roll gap precision of the 0-2 sections gone out after crystallizer uses the pattern relatively tightened to be controlled, and control range is in the first setting value -0.5
To between 0mm, being advantageous to reduce bulge deformation amount of the big face of interior outer arc at both sides, after slab goes out the 2nd section near leptoprosopy
Green shell solidifies substantially, and has reached certain intensity.
2nd, continuous casting machine roll-gap is measured, 1 section of roll gap precision before 3 sections-slighter compress used according to measurement result
Looser pattern is controlled, and for control range between the second setting value 0 to+0.5mm, this stage uses more loose roll gap
Pattern, be advantageous to the green shell that slab center has liquid phase and produce certain bulge, be more than the thickness of slab center
Edge position.
3rd, continuous casting machine roll-gap is measured, according to measurement result by 2 of implementation slighter compress or 3 section roll gap essences
Degree is controlled using the pattern more tightened, and 2 or 3 section roll gap precision controllings implementing slighter compress are set the 3rd
In the range of-the 0.5 to 0mm of value, this stage, using the roll gap pattern more tightened, it is effective indirectly to improve slighter compress technique
Drafts, simultaneously because leading portion gap preset slab center has produced bulge, now increasing drafts can be with useful effect
In in green shell of the slab center position with wick-containing, the wind that triangle zone position cracks because pressure is excessive can be both reduced
Danger, while effective pressure of wick-containing position can be increased, reduce center segregation.
4th, continuous casting machine roll-gap is measured, according to measurement result to 1 section of -14 sections of roll gap precision after slighter compress use compared with
Be controlled for loose pattern, by 1 section of -14 sections of roll gap precision controlling after slighter compress the 4th setting value ± 0.5mm
In the range of, this stage slab solidifies completely, in order to which this stage in extension device life-span uses loose roll gap pattern.
The application makes interior outer arc big face during the arrival slighter compress section of solidified shell 1 form slightly by the control to roll gap
Bulge, as shown in figure 3, wherein 3-1 be second solidification Bear-grudge shells, 3-2 is the second center liquid phase region, and 3-3 is the second slighter compress pressure
Exert oneself, 3-4 the second inner arc rollers, 3-5 is the second slab trigonum, and 3-6 is the second outer arc roller, and now the second slighter compress is depressed
Power 3-3 can preferably act on the second center solid-liquid two-phase region 3-2, improve the efficiency of slighter compress, while reduce to second
Slab trigonum 3-5 pressure, effectively prevent the generation of the position underbead crack, and this method is simple to operate, it is not necessary to pair set
It is standby to be transformed, it is obvious to lifting slab mass effect.
Embodiment two
Experiment casting steel grade is high-grade pipe line steel X70, and main component is shown in Table 1, and conticaster is double-current sheet billet continuous casting
Machine, it is 230mm × (900-1600) mm that can pour section, this 6 stove of casting altogether.Simulation casting, slab section are first carried out before pouring
For 230mm × 1100mm, pulling rate 1.3m/min, learn that solidification end solid-liquid two-phase region is located at away from meniscus according to analog result
18.22-21.79m position, reduction section is at 8,9 sections.
The roll gap of the different sections flowed according to simulation Cast parameters to conticaster 2 is adjusted by said new method, and 1 stream uses
Conventional roll gap control technique.
Roll gap is flowed to conticaster 2 to measure, casting machine roll gap is entered by following requirement according to measurement result using roll gap meter
The following control of row；
0 section -2 sections of roll gap precision, which is pressed, controls adjustment in the range of-the 0.5 to 0mm of the first setting value；
3 sections -7 sections of roll gap precision adjusts according to 0 to+0.5mm scope control of the second setting value；
8-9 section roll gap precision adjusts according to -0.5 to 0mm scope control of the 3rd setting value；
10-14 section roll gap precision adjusts according to control in the range of the ± 0.5mm of the 4th setting value.
Result after final roll gap regulation is as shown in table 2.
1 stream, 2 streams are cast by normal process after the completion of roll gap regulation, the of each heat double fluid in casting cycle
Two blocks of slabs take coarse micro-grain sample, internal soundness are analyzed, analysis result is as shown in table 3.
Table 1 tests steel grade main component/%
Actual roll gap situation/mm after the stream adjustment of the conticaster 2 of table 2
The slab internal soundness situation of table 3
It should be noted that only it can be only achieved the application in the case where meeting the control condition of the foregoing all steps of the present invention
The technique effect to be reached.The application mainly improves slighter compress technique by controlling the roll gap precision of diverse location fan-shaped section
Pressure efficiency, improve center segregation, while reduce underbead crack, by the application of above method, enable to produce
High-grade pipe line steel, high-strength steel and medium carbon alloy steel central segregation of slab C class≤1.0 grade (the rating scale GB/T226- gone out
2015) ratio reaches more than 96%, and the underbead crack such as middle crack, triangular area crack is all controlled below 1.0 grades.
It should be noted last that above embodiment is merely illustrative of the technical solution of the present invention and unrestricted,
Although the present invention is described in detail with reference to example, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, it all should cover
Among scope of the presently claimed invention.
Claims (9)
- A kind of 1. method for improving slab slighter compress efficiency, it is characterised in that including：Before conticaster is opened and poured, the composition of cast steel grade, casting specification, pulling rate are input to the conticaster simulation casting system In system, the position of solidification end mushy zone in the conticaster casting cycle is determined, records the location parameter of slighter compress reduction section With pressure range length；The continuous casting machine roll-gap is measured, according to measurement result by 0 section -2 sections of roll gap precision controlling in the first setting value - 0.5 to 0mm in the range of；The continuous casting machine roll-gap is measured, 1 section of roll gap precision before 3 sections-slighter compress controlled according to measurement result System；The continuous casting machine roll-gap is measured, according to measurement result by 2 or 3 section roll gap precision of implementation slighter compress It is controlled；The continuous casting machine roll-gap is measured, 1 section of -14 sections of roll gap precision after slighter compress controlled according to measurement result System.
- 2. the method for slab slighter compress efficiency is improved as claimed in claim 1, it is characterised in that：The continuous casting machine roll-gap is measured, 1 section of roll gap precision controlling before 3 sections-slighter compress existed according to measurement result In the range of the 0 to+0.5mm of second setting value.
- 3. the method for slab slighter compress efficiency is improved as claimed in claim 1, it is characterised in that：The continuous casting machine roll-gap is measured, 2 or 3 section roll gap precision controls of slighter compress will be implemented according to measurement result System is in the range of-the 0.5 to 0mm of the 3rd setting value.
- 4. the method for slab slighter compress efficiency is improved as claimed in claim 1, it is characterised in that：The continuous casting machine roll-gap is measured, according to measurement result by 1 section of -14 sections of roll gap precision controlling after slighter compress In the range of ± the 0.5mm of four setting values.
- 5. the method for the raising slab slighter compress efficiency as described in claim any one of 1-4, it is characterised in that also include：The continuous casting machine roll-gap after adjustment is measured again and veritified.
- 6. the method for slab slighter compress efficiency is improved as claimed in claim 1, it is characterised in that：First setting value is a fixed value.
- 7. the method for slab slighter compress efficiency is improved as claimed in claim 2, it is characterised in that：Second setting value is a fixed value.
- 8. the method for slab slighter compress efficiency is improved as claimed in claim 3, it is characterised in that：3rd setting value is a fixed value.
- 9. the method for slab slighter compress efficiency is improved as claimed in claim 4, it is characterised in that：4th setting value is a fixed value.
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| CN201710601785.1A CN107442756B (en) | 2017-07-21 | 2017-07-21 | The method for improving slab slighter compress efficiency |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112264594A (en) * | 2020-08-27 | 2021-01-26 | 邯郸钢铁集团有限责任公司 | Control method for improving control precision of opening degree under soft press of continuous casting fan-shaped section |
| CN114054707A (en) * | 2021-10-11 | 2022-02-18 | 包头钢铁（集团）有限责任公司 | Method for reducing center segregation of pipeline steel continuous casting billet |
| CN114472821A (en) * | 2020-11-13 | 2022-05-13 | 上海梅山钢铁股份有限公司 | Calibration method for opening degree of streamline roll gap in continuous casting of plate blank |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323388A (en) * | 2011-05-18 | 2012-01-18 | 河北钢铁股份有限公司邯郸分公司 | A kind of roll bending limit portion vertical crack produces the determination methods of reason |
| CN103286290A (en) * | 2013-06-18 | 2013-09-11 | 攀钢集团攀枝花钢钒有限公司 | Method for controlling slab high sulfur-containing straight carbon steel triangular area cracks |
| CN103447493A (en) * | 2013-09-05 | 2013-12-18 | 东北大学 | Control method of soft-reduction depressed region of wide and thick plate continuous casting blank |
| JP5402308B2 (en) * | 2009-06-26 | 2014-01-29 | Ｊｆｅスチール株式会社 | Continuous casting method of high carbon steel |
| CN105562642A (en) * | 2015-12-26 | 2016-05-11 | 首钢总公司 | Control method for typical middle cracks and center segregation during pipeline steel slab continuous casting |
| JP2017024079A (en) * | 2015-07-22 | 2017-02-02 | Ｊｆｅスチール株式会社 | Continuous casting method for steel |
-
2017
- 2017-07-21 CN CN201710601785.1A patent/CN107442756B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5402308B2 (en) * | 2009-06-26 | 2014-01-29 | Ｊｆｅスチール株式会社 | Continuous casting method of high carbon steel |
| CN102323388A (en) * | 2011-05-18 | 2012-01-18 | 河北钢铁股份有限公司邯郸分公司 | A kind of roll bending limit portion vertical crack produces the determination methods of reason |
| CN103286290A (en) * | 2013-06-18 | 2013-09-11 | 攀钢集团攀枝花钢钒有限公司 | Method for controlling slab high sulfur-containing straight carbon steel triangular area cracks |
| CN103447493A (en) * | 2013-09-05 | 2013-12-18 | 东北大学 | Control method of soft-reduction depressed region of wide and thick plate continuous casting blank |
| JP2017024079A (en) * | 2015-07-22 | 2017-02-02 | Ｊｆｅスチール株式会社 | Continuous casting method for steel |
| CN105562642A (en) * | 2015-12-26 | 2016-05-11 | 首钢总公司 | Control method for typical middle cracks and center segregation during pipeline steel slab continuous casting |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112264594A (en) * | 2020-08-27 | 2021-01-26 | 邯郸钢铁集团有限责任公司 | Control method for improving control precision of opening degree under soft press of continuous casting fan-shaped section |
| CN114472821A (en) * | 2020-11-13 | 2022-05-13 | 上海梅山钢铁股份有限公司 | Calibration method for opening degree of streamline roll gap in continuous casting of plate blank |
| CN114472821B (en) * | 2020-11-13 | 2024-06-04 | 上海梅山钢铁股份有限公司 | Calibrating method for opening degree of flow line roll gap of slab continuous casting |
| CN114054707A (en) * | 2021-10-11 | 2022-02-18 | 包头钢铁（集团）有限责任公司 | Method for reducing center segregation of pipeline steel continuous casting billet |
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| CN107442756B (en) | 2019-05-24 |
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