CN107142360A - A kind of method of raising SUS410L stainless steel annealing stability - Google Patents
A kind of method of raising SUS410L stainless steel annealing stability Download PDFInfo
- Publication number
- CN107142360A CN107142360A CN201710437790.3A CN201710437790A CN107142360A CN 107142360 A CN107142360 A CN 107142360A CN 201710437790 A CN201710437790 A CN 201710437790A CN 107142360 A CN107142360 A CN 107142360A
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- sus410l
- reduction
- cooling
- annealing
- raising
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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a kind of method of raising SUS410L stainless steel annealing stability, including herein below：（1）Optimize bringing-up section furnace temperature setting pattern, original parabola heating furnace temperature setting means is changed to balance heating mode；（2）Heating furnace plate temperature debugging functions are closed in production process；（3）Reduction II section cooling water pressures of cooling, it is to avoid too fast cause performance unstable because steel band is cooled down in cooling II areas；（4）Adjust heating furnace oxygen content setting value, it is ensured that SUS410L heating plates temperature is stable；（5）Improve uncoiling and fill set speed, increase set amount, reduce reduction of speed of process section when welding caused by the reduction of set amount；（6）Linear transducer is installed on raw material annealing and pickling unit 2# deviation rectification rollers, it is ensured that increase reduces sideslip in kink and causes process section reduction of speed while filling set speed.Present invention ensure that plate temperature stablizes controlled during SUS410L annealing, draught pressure fluctuation is small, and thickness deviation is small, broken belt rate reduction.
Description
Technical field
The present invention relates to a kind of method of raising SUS410L stainless steel annealing stability, belong to stainless steel production technology neck
Domain.
Background technology
SUS410L stainless steels are used for container panel, high to performance, plate shape, thickness requirement.To ensure product quality,
" cover annealing+hot line pickling+rolling+cold line annealing and pickling " production technology is taken always.But cover annealing is not only produced
Cycle is long, and production cost is high.To save production cost, shorten the manufacturing cycle, eliminate cover annealing, technique becomes
" hot line annealing and pickling+rolling+cold line annealing and pickling ", but through producing after a while, discovery is taken without cover annealing
The volume of hot line annealing and pickling, part rolling pressing pressure is unstable during rolling, and thickness fluctuation is big, broken belt rate first mate increase.Through analysis,
Mainly SUS410L strip properties when hot line is annealed are very sensitive to the fluctuation of annealed sheet temperature, and temperature slightly changes, strip property
Elongation after fracture will fluctuation, sometimes even there is martensitic traoformation tissue.Therefore, it is badly in need of a kind of raising SUS410L not
The method for steel annealing stability of becoming rusty.
The content of the invention
The present invention is intended to provide a kind of stainless steel annealing method, it is ensured that plate temperature stablizes controlled when SUS410L anneals, so as to protect
Demonstrate,prove strip property stable, draught pressure fluctuation is small during rolling, and thickness deviation is small, broken belt rate reduction.
The stainless steel raw material method for annealing that the present invention is provided, pattern is set by furnace temperature of being annealed during feed change annealing and pickling
And the cooling velocity after raw material annealing, steel band performance uniformity after raw material anneal uniformity and cooling is improved, and take " former
The process route of material annealing and pickling+Continuous mill train rolling+finished products pickling ".
A kind of method for stability of being annealed the invention provides raising SUS410L stainless steels raw material, comprises the following steps：
（1）Bringing-up section is divided into 7 heating zones, and original parabola is heated furnace temperature by optimization bringing-up section 1-5 areas furnace temperature setting pattern
Setting means is changed to balance heating mode, and improves the furnace temperature setting of 1-5th area, is improved to 900-915 DEG C, reduced by 875-895 DEG C
Because steel belt plate temperature caused by each area's furnace temperature setting of heating furnace is unbalanced；
（2）Heating furnace plate temperature debugging functions are closed in production process, are prevented effectively from before and after weld seam due to plate caused by thickness fluctuation
Temperature fluctuation；
（3）Reduction II sections of cooling water pressures of cooling, by original 3-5kg/cm2It is reduced to 1- 2kg/cm2, it is to avoid because steel band exists
The cooling of cooling II areas is too fast to cause performance unstable；
（4）Heating furnace oxygen content setting value, by original 7%, 7%, 7%（Volume ratio）Revise to 6%, 7%, 6%（Volume ratio）, it is ensured that
SUS410L heating plates temperature is stable；
（5）Improve uncoiling and fill set speed, improved by original 90-110m/min to 120-125m/min, and preceding kink is stored
Set amount increases to 90% by original 75%, increases effective 68.7 meters of strip memory length, and set amount subtracts when reducing process section because of welding
The reduction of speed caused less；
（6）Linear transducer is installed on kink 2# deviation rectification rollers before raw material annealing and pickling unit, it is ensured that the same of set speed is filled in increase
When reduce kink in sideslip cause process section reduction of speed.
Beneficial effects of the present invention：
The method for the raising SUS410L stainless steel annealing stability that the present invention is provided, it is ensured that SUS410L annealed sheets temperature fluctuates model
System is contained between ± 5 DEG C, smooth performance after strip annealing.Elongation after fracture more than 22%, draught pressure fluctuation ± 50kN it
Between, finished product thickness fluctuation≤± 0.02mm, broken belt rate fully achieves cold continuous rolling rolling below 0.8%.
Embodiment
The present invention is further illustrated below by embodiment, but is not limited to following examples.
Embodiment 1：It is 3.0mm to thickness that the present embodiment, which is, and width is warm in 1# according to this invention for 1240mm SUS410L
Line carries out implementation during raw material annealing and pickling process for producing, specific as follows：
1st, 1# hot lines are that will weld to realize that unit connects end to end by MIG welding machines between stainless cold rolling mill raw material annealing and pickling line, steel band
Continuous production.To ensure that raw material is not influenceed when annealing production by welding, steel band needs quickly to fill set after the completion of welding end to end, it is ensured that
The steel band length of annealing process section operation when unit head steel band memory length is more than welding when welding next time.When 3.0mm ×
Uncoiling after the completion of the volume raw material SUS410L steel bands welding of 1240mm casting skins fill set speed by 95 original m/min improve to
122m/min；
2nd, 4 layers of operation of kink point before 1# hot lines unit, can effectively store effective 458 meters of strip length, be filled set speed and set amount
Effect length, such as fill set excessive velocities or set amount it is excessive can cause steel belt deviation influence annealing process section, for eliminate sideslip show
As the influence to annealing process section speed, increase linear transducer at kink 2# deviation rectification rollers before raw material annealed wire；
3rd, when SUS410L enters raw material annealing furnace by preceding kink, original parabola heating furnace temperature setting means is changed to put down
Weighed heating mode, by improving 1-5 areas furnace temperature setting value, and parabola furnace temperature setting pattern is changed to balance heating mode, should
The specific setting value of embodiment is:
4th, by the limitation in uneven thickness end to end of hot rolling raw material, when steel band is located by raw material annealing furnace end to end, strip anneal temperature meeting
There is abnormal fluctuating, cause pressure oscillation in the operation of rolling.In the method provided according to the present invention, the embodiment, raw material is closed
Annealing furnace " PRY " plate temperature debugging functions, it is to avoid steel band annealing temperature unusual fluctuations end to end；
5th, 3.0mm × 1240mm casting skins volume raw material SUS410L enters after annealing furnace, while improving 1-5 area's furnace temperature setting values, will
Three interval oxygen contents of annealing furnace are from original 7%, 7%, 7%（Volume ratio）Revise to 6%, 7%, 6%, it is ensured that SUS410L anneals
During temperature of steel strips stablize controlled；
6th, SUS410L raw materials are after 1# hot line annealing furnace solution treatment, and steel band enters cooling section, it is ensured that steel band cooling effect it is same
When ensure that steel band cooling is uniform, performance is stable.II area's cooling water pressure of cooling is reduced to 1.5 kg/cm2。
Embodiment 2：It is 3.5mm to thickness that the present embodiment, which is, and width is warm in 1# according to this invention for 1260mm SUS410L
Line carries out implementation during raw material annealing and pickling process for producing, specific as follows：
1st, 1# hot lines are that will weld to realize that unit connects end to end by MIG welding machines between stainless cold rolling mill raw material annealing and pickling line, steel band
Continuous production.To ensure that raw material is not influenceed when annealing production by welding, steel band needs quickly to fill set after the completion of welding end to end, it is ensured that
The steel band length of annealing process section operation when unit head steel band memory length is more than welding when welding next time.When 3.5mm ×
Uncoiling after the completion of the volume raw material SUS410L steel bands welding of 1260mm casting skins fill set speed by 90 original m/min improve to
120m/min；
2nd, 4 layers of operation of kink point before 1# hot lines unit, can effectively store effective 458 meters of strip length, be filled set speed and set amount
Effect length, such as fill set excessive velocities or set amount it is excessive can cause steel belt deviation influence annealing process section, for eliminate sideslip show
As the influence to annealing process section speed, increase linear transducer at kink 2# deviation rectification rollers before raw material annealed wire；
3rd, when SUS410L enters raw material annealing furnace by preceding kink, original parabola heating furnace temperature setting means is changed to put down
Weighed heating mode, by improving 1-5 areas furnace temperature setting value, and parabola furnace temperature setting pattern is changed to balance heating mode, should
The specific setting value of embodiment is:
4th, by the limitation in uneven thickness end to end of hot rolling raw material, when steel band is located by raw material annealing furnace end to end, strip anneal temperature meeting
There is abnormal fluctuating, cause pressure oscillation in the operation of rolling.In the method provided according to the present invention, the embodiment, raw material is closed
Annealing furnace " PRY " plate temperature debugging functions, it is to avoid steel band annealing temperature unusual fluctuations end to end；
5th, 3.5mm × 1260mm casting skins volume raw material SUS410L enters after annealing furnace, while improving 1-5 area's furnace temperature setting values, will
Three interval oxygen contents of annealing furnace are from original 7%, 7%, 7%（Volume ratio）Revise to 6%, 7%, 6%（Volume ratio）, it is ensured that
Temperature of steel strips stablizes controlled in SUS410L annealing processes；
6th, SUS410L raw materials are after 1# hot line annealing furnace solution treatment, and steel band enters cooling section, it is ensured that steel band cooling effect it is same
When ensure that steel band cooling is uniform, performance is stable.Cooling II areas cooling water pressure is reduced to 1.5 kg/cm2。
Claims (6)
1. a kind of method of raising SUS410L stainless steel annealing stability, it is characterised in that：Including herein below：
（1）Optimize bringing-up section furnace temperature setting pattern, original parabola heating furnace temperature setting means be changed to balance heating mode,
Reduce because steel belt plate temperature caused by each area's furnace temperature setting of heating furnace is unbalanced；
（2）Heating furnace plate temperature debugging functions are closed in production process, are prevented effectively from before and after weld seam due to plate caused by thickness fluctuation
Temperature fluctuation；
（3）Reduction II section cooling water pressures of cooling, it is to avoid too fast cause performance unstable because steel band is cooled down in cooling II areas；
（4）Adjust heating furnace oxygen content setting value, it is ensured that SUS410L heating plates temperature is stable；
（5）Improve uncoiling and fill set speed, increase set amount, reduce reduction of speed of process section when welding caused by the reduction of set amount；
（6）Linear transducer is installed on kink 2# deviation rectification rollers before raw material annealing and pickling unit, it is ensured that the same of set speed is filled in increase
When reduce kink in sideslip cause process section reduction of speed.
2. the method for raising SUS410L stainless steel annealing stability according to claim 1, it is characterised in that：Step（1）
In, original parabola heating furnace temperature setting means is changed to balance heating mode, and carry by optimization bringing-up section furnace temperature setting pattern
The furnace temperature setting of high 1-5 areas, is improved to 900-915 DEG C by 875-895 DEG C, is reduced due to steel caused by each area's furnace temperature setting of heating furnace
Band plate temperature is unbalanced.
3. the method for raising SUS410L stainless steel annealing stability according to claim 1, it is characterised in that：Step（3）
In, reduction II sections of cooling water pressures of cooling, by original 3-5 kg/cm2It is reduced to the kg/cm of 1- 22, it is to avoid because steel band is in cooling
The cooling of II areas is too fast to cause performance unstable.
4. the method for raising SUS410L stainless steel annealing stability according to claim 1, it is characterised in that：Step（4）
In, heating furnace oxygen content setting value, by original 7%, 7%, 7% revision to 6%, 7%, 6%, it is ensured that SUS410L heating plates temperature is stable.
5. the method for raising SUS410L stainless steel annealing stability according to claim 1, it is characterised in that：Step（5）
In, improve uncoiling and fill set speed, improved by original 90-110m/min to 120-125m/min, and preceding kink is stored into set amount
90% is increased to by original 75%, increases effective 68.7 meters of strip memory length, set amount is reduced and made when reducing process section because of welding
Into reduction of speed.
6. the method for the raising SUS410L stainless steel annealing stability according to any one of claim 1 ~ 5, its feature exists
In：SUS410L annealed sheet temperature fluctuation ranges are between ± 5 DEG C, elongation after fracture more than 22%, and draught pressure is fluctuated in ± 50kN
Between, finished product thickness fluctuation≤± 0.02mm, broken belt rate is below 0.8%.
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| CN201710437790.3A CN107142360B (en) | 2017-06-12 | 2017-06-12 | A method of improving SUS410L stainless steel annealing stability |
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| CN201710437790.3A CN107142360B (en) | 2017-06-12 | 2017-06-12 | A method of improving SUS410L stainless steel annealing stability |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0929395A (en) * | 1995-07-26 | 1997-02-04 | Nippon Steel Corp | Manufacture of stainless steel strip by continuous casting hot rolling and heat treatment furnace therefor |
| CN102925904A (en) * | 2012-11-30 | 2013-02-13 | 张家港浦项不锈钢有限公司 | Thermal annealing acid-washing method of stainless steel wide and thick plate coil |
| CN105002348A (en) * | 2015-07-11 | 2015-10-28 | 山东泰山钢铁集团有限公司 | Continuous annealing acid pickling system and method for hot rolling stainless steel composite steel belt |
| CN106282497A (en) * | 2015-05-21 | 2017-01-04 | 上海梅山钢铁股份有限公司 | A kind of stable control method of vertical continuous annealing furnace gauge switching |
| CN106435160A (en) * | 2016-11-22 | 2017-02-22 | 首钢京唐钢铁联合有限责任公司 | Method and system for controlling the temperature in annealing furnace |
-
2017
- 2017-06-12 CN CN201710437790.3A patent/CN107142360B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0929395A (en) * | 1995-07-26 | 1997-02-04 | Nippon Steel Corp | Manufacture of stainless steel strip by continuous casting hot rolling and heat treatment furnace therefor |
| CN102925904A (en) * | 2012-11-30 | 2013-02-13 | 张家港浦项不锈钢有限公司 | Thermal annealing acid-washing method of stainless steel wide and thick plate coil |
| CN106282497A (en) * | 2015-05-21 | 2017-01-04 | 上海梅山钢铁股份有限公司 | A kind of stable control method of vertical continuous annealing furnace gauge switching |
| CN105002348A (en) * | 2015-07-11 | 2015-10-28 | 山东泰山钢铁集团有限公司 | Continuous annealing acid pickling system and method for hot rolling stainless steel composite steel belt |
| CN106435160A (en) * | 2016-11-22 | 2017-02-22 | 首钢京唐钢铁联合有限责任公司 | Method and system for controlling the temperature in annealing furnace |
Non-Patent Citations (3)
| Title |
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| 何汝迎等: "《不锈钢冷轧生产技术及产品应用》", 31 August 2014, 北京：冶金工业出版社 * |
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| 杜海宪等: ""SUS410L不锈钢冷轧APC退火工艺优化"", 《宝钢技术》 * |
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