CN108642266A - A kind of production method of strip - Google Patents
A kind of production method of strip Download PDFInfo
- Publication number
- CN108642266A CN108642266A CN201810345027.2A CN201810345027A CN108642266A CN 108642266 A CN108642266 A CN 108642266A CN 201810345027 A CN201810345027 A CN 201810345027A CN 108642266 A CN108642266 A CN 108642266A
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- CN
- China
- Prior art keywords
- strip
- temperature
- nitrogen
- cooled down
- quickly cooled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a kind of production methods of strip, including：Original strip is heated, heating temperature is 745 795 DEG C；Soaking is carried out to the strip after heating, soaking temperature is 755 795 DEG C；Slow cooling is carried out to the strip after soaking, the temperature of Slow cooling is 630 670 DEG C；Strip after Slow cooling is quickly cooled down, the temperature being quickly cooled down is 415 460 DEG C；Strip after being quickly cooled down is sent to overaging area, the temperature in the overaging area is 340 390 DEG C.The present invention is by controlling temperature of the strip in heating and cooling process, temperature is controlled into reduced levels under the conditions of can ensure properties of product, thus the nitrogen-atoms in nitrogen is reduced to the rate spread with steel matrix, to reduce the probability of the nitrogen flushed zone steel matrix in stove, the technical problem that nitrogen pick-up is exceeded in production process in the prior art is efficiently solved, the technique effect for improving strip final product quality is realized.
Description
Technical field
The present invention relates to rolling technical field more particularly to a kind of production methods of strip.
Background technology
Flux-cored wire is a kind of novel welding material rapidly developed in recent years, is had been obtained for extensively in industrially developed country
General application.Flux-cored wire is mainly the welding wire that low-carbon cold rolling strip is formed by drawing after slitting striping, filling flux medicinal powder.Closely
Nian Lai, with the fast development of China's industry, the production of flux-cored wire has obtained faster development.
It is usually according to welding wire production producer currently, because of the domestic technical standard without welding wire cold-rolled strip
Requirement formulate.Currently, Shoudu Iron and Steel Co steel for welding wire downstream client proposes strict demand to cold-strip steel Composition Control, wherein right
Nitrogen component is particularly stringent.
From 2014 to 2016 year, Shoudu Iron and Steel Co repeatedly carries the exceeded quality objection of report nitrogen component for downstream steel for welding wire client,
Therefore, carrying out control to the nitrogen pick-up situation of strip is necessary.
Invention content
It is exceeded to solve nitrogen pick-up in production process in the prior art by providing a kind of production method of strip by the present invention
Technical problem realizes the technique effect for improving strip final product quality.
The present invention provides a kind of production methods of strip, including：
Original strip is heated, heating temperature is 745-795 DEG C；
Soaking is carried out to the strip after heating, soaking temperature is 755-795 DEG C；
Slow cooling is carried out to the strip after soaking, the temperature of Slow cooling is 630-670 DEG C；
Strip after Slow cooling is quickly cooled down, the temperature being quickly cooled down is 415-460 DEG C；
Strip after being quickly cooled down is sent to overaging area, the temperature in the overaging area is 340-390 DEG C.
Further, the strip is in the heating stepses, the soak step, the Slow cooling step and described fast
Movement speed in fast cooling step is more than or equal to 100mpm.
Further, it is described original strip is heated before, further include：The original strip is cleaned.
Further, it is described the original strip is cleaned before, further include：The original strip is welded
It connects.
Further, it is described the original strip is welded before, further include：The original strip is opened
Volume.
Further, strip after being quickly cooled down is sent to overaging area described, further includes：To the strip into
Row is smooth.
Further, the strip is carried out described it is smooth after, oiling is carried out to the strip after smooth.
Further, after the strip to after smooth carries out oiling, the strip after oiling is batched.
Further, the chemical quality percentage of the original strip is：C 0.015-0.035wt%, Si≤
0.03wt%, Mn 0.18-0.26wt%, P≤0.10wt%, S≤0.01wt%, Alt≤0.030wt%, O≤
0.0050wt%, N≤0.0030wt%, Cr≤0.025wt%, Cu≤0.05wt%.
The one or more technical solutions provided in the present invention, have at least the following technical effects or advantages：
Temperature of the strip in heating and cooling process is controlled, temperature control can ensured into properties of product
Under the conditions of reduced levels, thus reduce the nitrogen-atoms in nitrogen to the rate spread with steel matrix, to reduce in stove
Nitrogen flushed zone steel matrix probability, efficiently solve the technical problem that nitrogen pick-up is exceeded in production process in the prior art, it is real
The technique effect for improving strip final product quality is showed.
Description of the drawings
Fig. 1 is the flow chart of the production method of strip provided in an embodiment of the present invention.
Specific implementation mode
The embodiment of the present invention solves nitrogen pick-up in production process in the prior art by providing a kind of production method of strip
Exceeded technical problem realizes the technique effect for improving strip final product quality.
Technical solution in the embodiment of the present invention is to solve the above problems, general thought is as follows：
Temperature of the strip in heating and cooling process is controlled, temperature control can ensured into properties of product
Under the conditions of reduced levels, thus reduce the nitrogen-atoms in nitrogen to the rate spread with steel matrix, to reduce in stove
Nitrogen flushed zone steel matrix probability, efficiently solve the technical problem that nitrogen pick-up is exceeded in production process in the prior art, it is real
The technique effect for improving strip final product quality is showed.
Above-mentioned technical proposal in order to better understand, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
Referring to Fig. 1, the production method of strip provided in an embodiment of the present invention, including：
Step S110：Original strip is heated, heating temperature is 745-795 DEG C, to ensure that original strip heating is equal
It is even；
In the present embodiment, the chemical quality percentage of original strip is：C 0.015-0.035wt%, Si≤
0.03wt%, Mn 0.18-0.26wt%, P≤0.10wt%, S≤0.01wt%, Alt≤0.030wt%, O≤
0.0050wt%, N≤0.0030wt%, Cr≤0.025wt%, Cu≤0.05wt%.
Step S120：Soaking is carried out to the strip after heating, soaking temperature is 755-795 DEG C, to ensure that strip is heated equal
It is even；
Step S130：Slow cooling is carried out to the strip after soaking, the temperature of Slow cooling is 630-670 DEG C；
Step S140：Strip after Slow cooling is quickly cooled down, the temperature being quickly cooled down is 415-460 DEG C；
Step S150：Strip after being quickly cooled down is sent to overaging area, the temperature in overaging area is 340-390 DEG C.
Specifically, strip is in heating stepses, soak step, Slow cooling step and the movement speed being quickly cooled down in step
More than or equal to 100mpm.
The embodiment of the present invention is specifically described, before step S110, further includes：Original strip is cleaned.
In the present embodiment, the emulsion residue of belt steel surface is mainly removed.
The embodiment of the present invention is further described, before being cleaned to original strip, further includes：To grandfather tape
Steel is welded.
The embodiment of the present invention is further described, before being welded to original strip, further includes：To grandfather tape
Steel carries out uncoiling.
The embodiment of the present invention is illustrated further, is sent to overaging area by the strip after being quickly cooled down,
Further include：It is smooth to strip progress, pass through smooth improvement plate shape and replicates the roughness on required surface.
The embodiment of the present invention is illustrated further, strip is carried out it is smooth after, to the strip after smooth into
Row oiling.
In the present embodiment, oiling is carried out according to different painting oil masses.
The embodiment of the present invention is further illustrated, after carrying out oiling to the strip after smooth, after oiling
Strip batched.
In the present embodiment, the strip after oiling is batched by taking-up equipment.
Embodiment 1
By chemical quality percentage be C 0.015-0.035wt%, Si≤0.03wt%, Mn 0.18-0.26wt%, P≤
0.10wt%, S≤0.01wt%, Alt≤0.030wt%, O≤0.0050wt%, N≤0.0030wt%, Cr≤
The strip of 0.025wt%, Cu≤0.05wt% pass through uncoiling, welding, cleaning, annealing, cooling, smooth, oiling, batched successively
Journey.Wherein, the temperature that strip enters bringing-up section area is 776 DEG C, and the temperature of soaking zone is 777 DEG C, and the temperature of slow cooling section is 651
DEG C, the temperature of rapid cooling section is 428 DEG C, 352 DEG C of the temperature of overaging section, and strip steel furnace area speed is 223mpm, each technique ginseng of continuous annealing
Number control is shown in Table 1.
Embodiment 2
By chemical quality percentage be C 0.015-0.035wt%, Si≤0.03wt%, Mn 0.18-0.26wt%, P≤
0.10wt%, S≤0.01wt%, Alt≤0.030wt%, O≤0.0050wt%, N≤0.0030wt%, Cr≤
The strip of 0.025wt%, Cu≤0.05wt% pass through uncoiling, welding, cleaning, annealing, cooling, smooth, oiling, batched successively
Journey.Wherein, the temperature that strip enters bringing-up section area is 784 DEG C, and the temperature of soaking zone is 780 DEG C, and the temperature of slow cooling section is 646
DEG C, the temperature of rapid cooling section is 429 DEG C, 370 DEG C of the temperature of overaging section, and strip steel furnace area speed is 252mpm, each technique ginseng of continuous annealing
Number control is shown in Table 1.
Embodiment 3
By chemical quality percentage be C 0.015-0.035wt%, Si≤0.03wt%, Mn 0.18-0.26wt%, P≤
0.10wt%, S≤0.01wt%, Alt≤0.030wt%, O≤0.0050wt%, N≤0.0030wt%, Cr≤
The strip of 0.025wt%, Cu≤0.05wt% pass through uncoiling, welding, cleaning, annealing, cooling, smooth, oiling, batched successively
Journey.Wherein, the temperature that strip enters bringing-up section area is 783 DEG C, and the temperature of soaking zone is 780 DEG C, and the temperature of slow cooling section is 646
DEG C, the temperature of rapid cooling section is 429 DEG C, 370 DEG C of the temperature of overaging section, and strip steel furnace area speed is 252mpm, each technique ginseng of continuous annealing
Number control is shown in Table 1.
Comparative example
By chemical quality percentage be C 0.015-0.035wt%, Si≤0.03wt%, Mn 0.18-0.26wt%, P≤
0.10wt%, S≤0.01wt%, Alt≤0.030wt%, O≤0.0050wt%, N≤0.0030wt%, Cr≤
The strip of 0.025wt%, Cu≤0.05wt% pass through uncoiling, welding, cleaning, annealing, cooling, smooth, oiling, batched successively
Journey.Wherein, the temperature that strip enters bringing-up section area is 800 DEG C, and the temperature of soaking zone is 805 DEG C, and the temperature of slow cooling section is 645
DEG C, the temperature of rapid cooling section is 425 DEG C, and 370 DEG C of the temperature of overaging section, strip steel furnace area speed is 80mpm, each technological parameter of continuous annealing
Control is shown in Table 1.Nitrogen pick-up situation is shown in Table 2 to comparative example in process of production with embodiment 1, embodiment 2, embodiment 3.
Each section of key temperatures of 1 continuous annealing process of table control situation
As shown in Table 1, the incidence of nitrogen pick-up is substantially reduced after being optimized by annealing process.
| Embodiment | Continuous annealing entrance nitrogen (ppm) | Continuous annealing exports nitrogen (ppm) | Nitrogen pick-up value |
| Embodiment 1 | 17 | 22 | 5 |
| Embodiment 2 | 17 | 20 | 3 |
| Embodiment 3 | 15 | 19 | 4 |
| Comparative example | 13 | 25 | 12 |
2 nitrogen pick-up situation record sheet of table
As shown in Table 2, it by being detected to embodiment and comparative example continuous annealing entrance and exit nitrogen content is practical, and records
Nitrogen content value, comparison finds to be obviously reduced by the nitrogen pick-up amplitude after process optimization, and can control within the scope of customer demand.
【Technique effect】
1, the temperature to strip in heating and cooling process is controlled, and temperature control can ensured product
Reduced levels under the conditions of energy, thus the nitrogen-atoms in nitrogen is reduced to the rate spread with steel matrix, to reduce stove
The probability of interior nitrogen flushed zone steel matrix, efficiently solves the technical problem that nitrogen pick-up is exceeded in production process in the prior art,
Realize the technique effect for improving strip final product quality.
2, the movement speed to strip in heating and cooling process is controlled, and further avoids the nitrogen in nitrogen
Atom is spread to band steel matrix.
The embodiment of the present invention specifies the nitrogen pick-up process of cold rolling special-purpose steel, is made that cold rolling special-purpose steel critical process control nitrogen
Area requirement is specified, control nitrogen is efficient.The embodiment of the present invention specifies the nitrogen pick-up under different technology conditions in continuous annealing process
It is horizontal, it is proposed that a kind of process control method controlling special-purpose steel nitrogen pick-up by adjusting annealing speed is realized by producing work
Skill controls finished product nitrogen.It realizes best process conditions and is applied to produced on-site, it is special to form a set of exclusive cold rolling
Welding wire steel production method so that final finished nitrogen content meets requirement of the different clients to nitrogen.The embodiment of the present invention is not
Increase production cost, do not influence to produce, and under conditions of not influencing strip property, passes through the temperature to annealing furnace area each region
It spends and the speed in entire strip steel furnace area is strictly controlled, significantly reduce the hair of cold rolling special welding wire steel nitrogen pick-up situation
It is raw, not only implement simple, strong applicability, and economical and efficient, and significant effect.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (9)
1. a kind of production method of strip, which is characterized in that including：
Original strip is heated, heating temperature is 745-795 DEG C；
Soaking is carried out to the strip after heating, soaking temperature is 755-795 DEG C；
Slow cooling is carried out to the strip after soaking, the temperature of Slow cooling is 630-670 DEG C；
Strip after Slow cooling is quickly cooled down, the temperature being quickly cooled down is 415-460 DEG C；
Strip after being quickly cooled down is sent to overaging area, the temperature in the overaging area is 340-390 DEG C.
2. the method as described in claim 1, which is characterized in that the strip is in the heating stepses, the soak step, institute
It states Slow cooling step and the movement speed being quickly cooled down in step is more than or equal to 100mpm.
3. the method as described in claim 1, which is characterized in that it is described original strip is heated before, further include：It is right
The original strip is cleaned.
4. method as claimed in claim 3, which is characterized in that it is described the original strip is cleaned before, also wrap
It includes：The original strip is welded.
5. method as claimed in claim 4, which is characterized in that it is described the original strip is welded before, also wrap
It includes：Uncoiling is carried out to the original strip.
6. the method as described in claim 1, which is characterized in that it is described by the strip after being quickly cooled down send to overaging area it
Afterwards, further include：The strip is carried out smooth.
7. method as claimed in claim 6, which is characterized in that it is described to the strip carry out it is smooth after, after smooth
Strip carry out oiling.
8. the method for claim 7, which is characterized in that after the strip to after smooth carries out oiling, to applying
Strip after oil is batched.
9. the method as described in any one of claim 1-8, which is characterized in that the chemical quality percentage of the original strip
For：C 0.015-0.035wt%, Si≤0.03wt%, Mn 0.18-0.26wt%, P≤0.10wt%, S≤0.01wt%,
Alt≤0.030wt%, O≤0.0050wt%, N≤0.0030wt%, Cr≤0.025wt%, Cu≤0.05wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345027.2A CN108642266A (en) | 2018-04-17 | 2018-04-17 | A kind of production method of strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345027.2A CN108642266A (en) | 2018-04-17 | 2018-04-17 | A kind of production method of strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108642266A true CN108642266A (en) | 2018-10-12 |
Family
ID=63746336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810345027.2A Pending CN108642266A (en) | 2018-04-17 | 2018-04-17 | A kind of production method of strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108642266A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959476A (en) * | 2022-05-27 | 2022-08-30 | 山东钢铁集团日照有限公司 | Economical cold-rolled steel strip for flux-cored wire and production method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416404A (en) * | 2011-09-21 | 2012-04-18 | 首钢总公司 | Method for producing cold-rolled steel strips |
-
2018
- 2018-04-17 CN CN201810345027.2A patent/CN108642266A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416404A (en) * | 2011-09-21 | 2012-04-18 | 首钢总公司 | Method for producing cold-rolled steel strips |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959476A (en) * | 2022-05-27 | 2022-08-30 | 山东钢铁集团日照有限公司 | Economical cold-rolled steel strip for flux-cored wire and production method thereof |
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Application publication date: 20181012 |
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