CN105132819B - A kind of method of low chrome ferritic stainless steel continuous rolling - Google Patents
A kind of method of low chrome ferritic stainless steel continuous rolling Download PDFInfo
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- CN105132819B CN105132819B CN201510494899.1A CN201510494899A CN105132819B CN 105132819 B CN105132819 B CN 105132819B CN 201510494899 A CN201510494899 A CN 201510494899A CN 105132819 B CN105132819 B CN 105132819B
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Abstract
The present invention relates to rolled stainless steel field, a kind of method of low chrome ferritic stainless steel continuous rolling.A kind of method of low chrome ferritic stainless steel continuous rolling, select suitable coil of strip, coil of strip is by after batch annealing, together with the afterbody of previous coil of strip passes through laser welder with the stem of a rear coil of strip, after pickling, successively via five mill millings, five mill milling process total deformation rates are 60% ~ 80%, and mill speed is 80 ~ 110m/min.The invention has the beneficial effects as follows: the operation of rolling steadily, smoothly, does not occurs broken belt accident, roll rear end properties suitable with the end properties of single mill milling, meet inner quality standard.
Description
Technical field
The present invention relates to rolled stainless steel field, a kind of method of low chrome ferritic stainless steel continuous rolling.
Background technology
Low chrome ferritic stainless steel is that a class is cheap, atmospheric corrosion resistance and the excellent economical rustless steel of polishing machine.When single chassis rolls, the operation of rolling is steady.When stainless cold rolling mill continuous rolling production line examination this kind of low chrome ferritic stainless steel of rolling, often there is broken belt accident.Broken belt accident can cause production line stop, and operating rate declines, and lumber recovery declines.
Summary of the invention
The technical problem to be solved is: how to achieve the smooth rolling on tandem rolling line of this kind of low chrome ferritic stainless steel.
nullThe technical solution adopted in the present invention is: a kind of method of low chrome ferritic stainless steel continuous rolling，Coil of strip composition is by weight percentage containing C≤0.030%，Si≤1.00% ，Mn≤1.00%，P≤0.040%，S≤0.030%，Cr11~13.5%，Ni≤0.60%，N≤0.030%，Remaining is Fe and inevitable impurity，Coil of strip is by after batch annealing，Together with the afterbody of previous coil of strip passes through laser welder with the stem of a rear coil of strip，After pickling，Successively via five mill millings，Five mill milling process total deformation rates are 60% ~ 80%，Wherein the first mill milling process deformation rate is 25% ~ 30%、Second mill milling process deformation rate is 21% ~ 26%、3rd mill milling process deformation rate is 18% ~ 23%、4th mill milling process deformation rate is 15% ~ 20%、5th mill milling process deformation rate is 12% ~ 17%，Mill speed is 80 ~ 110m/min.
As a kind of optimal way: annealing temperature is 680 DEG C ~ 780 DEG C, and temperature retention time is 10 hours, after insulation terminates, the type of cooling is for being cooled to ambient temperature soon.
The invention has the beneficial effects as follows: the operation of rolling steadily, smoothly, does not occurs broken belt accident, roll rear end properties suitable with the end properties of single mill milling, meet inner quality standard.
Detailed description of the invention
The principle of institute of the present invention foundation is: during continuous rolling, and coil of strip passes through together with laser welder with coil of strip, successively via five mill millings；If former and later two coil of strip performance differences are relatively big, under identical draught pressure, the uneven thickness of coil of strip can be caused；Time again by next milling train, the change of thickness will cause rolling mill screwdown, speed, tension force generation saltus step, make roll gap response to catch up with in time when high speed cold tandem rolling, the hysteresis quality automatically adjusted due to inertia and the rolling load of continuous rolling, after weld seam, there is broken belt.Therefore, it is achieved the continuous rolling of cold continuous rolling, in addition to raw material to be ensured does not has defect, good weldquality, it is necessary to the stability of coil of strip mechanical property after ensureing to anneal.
The present invention is the annealing process by changing hot rolling raw material coil of strip, is i.e. changed into batch annealing by original continuous annealing process, selects suitable annealing temperature, temperature retention time and the type of cooling；Cold continuous rolling process is then intended to determine deformation rate and the mill speed of each frame, to reach the purpose that tandem rolling line steadily rolls.
Embodiment 1
Low chrome ferritic stainless steel composition is: C:0.015%, Si:0.35%, Mn:0.25%, P:0.025 %, S:0.005%, Cr:11.8%, Ni:0.05%, N:0.015%, and remaining is Fe and inevitable impurity；
Bell furnace holding temperature is 700 DEG C, temperature retention time 10 hours, and insulation is cooled to tapping temperature after terminating soon；
Hot rolled coil specification is 3.0mm, finished product cold-strip steel is 0.8mm, cold rolling total deformation rate is 80%, each milling train deformation rate the respectively first milling train deformation rate be the 29.5%, second milling train deformation rate be the 25.2%, the 3rd milling train deformation rate be milling train the 21.7%, the 4th milling train deformation rate be milling train the 18.3%, the 5th milling train deformation rate be milling train 15.8%, mill speed 86m/min；
The tandem rolling line operation of rolling is steady, does not occurs broken belt, end properties to meet inner quality standard.
End properties:
| Yield strength/Mpa | Tensile strength/Mpa | Elongation percentage/% | Hardness HV | Bending |
| 294 | 516 | 30 | 137/138/138 | Qualified |
Embodiment
2
Low chrome ferritic stainless steel composition C:0.013%, Si:0.32%, Mn:0.23%, P:0.021 %, S:0.004%, Cr:12.1%, Ni:0.04%, N:0.013%, remaining is Fe and inevitable impurity.
Bell furnace holding temperature is 720 DEG C, temperature retention time 10 hours, and insulation is cooled to tapping temperature after terminating soon.
Hot rolled coil specification is 3.0mm, and finished product cold-strip steel is 1.0mm, and cold rolling total deformation rate is 66.67%, and each milling train deformation rate is respectively 1# milling train 28.2%, 2# milling train 23.8%, 3# milling train 20.7%, 4# milling train 17.5%, 5# milling train 13.9%, mill speed 95m/min.
The tandem rolling line operation of rolling is steady, does not occurs broken belt, end properties to meet inner quality standard.
End properties:
| Yield strength/Mpa | Tensile strength/Mpa | Elongation percentage/% | Hardness HV | Bending |
| 281 | 501 | 28 | 139/140/141 | Qualified |
Embodiment 1 and embodiment 2 pass through cover annealing, take low temperature long-time heat preservation, ensure the uniformity of annealing process, mechanical property stable after being annealed, reduce the fluctuation of performance, mill milling total deformation rate and speed are set simultaneously, are distributed to the deformation rate of each mill milling, ensure the most excessive of milling train, it is achieved the smooth rolling of rustless steel tandem rolling line.
Claims (1)
- null1. the method for a low chrome ferritic stainless steel continuous rolling，It is characterized in that: coil of strip composition is by weight percentage containing C≤0.030%，Si≤1.00% ，Mn≤1.00%，P≤0.040%，S≤0.030%，Cr11~13.5%，Ni≤0.60%，N≤0.030%，Remaining is Fe and inevitable impurity，Coil of strip is by after batch annealing，Together with the afterbody of previous coil of strip passes through laser welder with the stem of a rear coil of strip，After pickling，Successively via five mill millings，Five mill milling process total deformation rates are 60% ~ 80%，Wherein the first mill milling process deformation rate is 25% ~ 30%、Second mill milling process deformation rate is 21% ~ 26%、3rd mill milling process deformation rate is 18% ~ 23%、4th mill milling process deformation rate is 15% ~ 20%、5th mill milling process deformation rate is 12% ~ 17%，Mill speed is 80 ~ 110m/min，Annealing temperature is 680 DEG C ~ 780 DEG C，Temperature retention time is 10 hours，After insulation terminates，The type of cooling is for being cooled to ambient temperature soon.
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| CN201510494899.1A CN105132819B (en) | 2015-08-13 | 2015-08-13 | A kind of method of low chrome ferritic stainless steel continuous rolling |
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| CN201510494899.1A CN105132819B (en) | 2015-08-13 | 2015-08-13 | A kind of method of low chrome ferritic stainless steel continuous rolling |
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| CN105132819B true CN105132819B (en) | 2016-11-30 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583449A (en) * | 2016-12-22 | 2017-04-26 | 山西太钢不锈钢股份有限公司 | Rolling method of ferritic stainless steel |
| CN107130188B (en) * | 2017-04-07 | 2019-02-19 | 邢台钢铁有限责任公司 | Welding ferritic stainless steel and its method for refining |
| CN107716558B (en) * | 2017-10-13 | 2019-08-23 | 山西太钢不锈钢股份有限公司 | A kind of stable operating method by five frame connection rolling machine of control stainless steel weld joint |
| CN108856289A (en) * | 2018-06-01 | 2018-11-23 | 山西太钢不锈钢股份有限公司 | Middle chrome ferritic stainless steel cold rolled strip steel production method |
| CN112029984B (en) * | 2020-08-13 | 2023-01-17 | 山东泰山钢铁集团有限公司 | Method for producing TSCr9LP stainless steel on continuous pickling line |
| CN115044826B (en) * | 2022-05-07 | 2023-09-15 | 广西柳州钢铁集团有限公司 | 410 ferrite stainless steel |
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| JPS59104202A (en) * | 1982-12-06 | 1984-06-16 | Nisshin Steel Co Ltd | Cold rolling method of ferritic stainless steel |
| EP0769333A1 (en) * | 1995-10-19 | 1997-04-23 | Usinor Sacilor | Method for continuously producing, in a line, rolled sheet metal strip of stainless steel with improved surface condition |
| CN1318438A (en) * | 2001-06-05 | 2001-10-24 | 宁波宝新不锈钢有限公司 | Cold rolling process of ferrite and martensitic stainless steel belt |
| CN103372567A (en) * | 2012-04-26 | 2013-10-30 | 宝山钢铁股份有限公司 | Method for producing ferritic stainless steel bands with roughened surfaces through cold continuous rolling |
| CN104014588A (en) * | 2013-02-28 | 2014-09-03 | 宝钢不锈钢有限公司 | Method for producing ferrite stainless steel cold-rolled strip steel |
| CN104471099A (en) * | 2012-06-28 | 2015-03-25 | Posco公司 | Low chrome and ferrite-based stainless steel having improved corrosion resistance and anti-ridging properties |
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- 2015-08-13 CN CN201510494899.1A patent/CN105132819B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59104202A (en) * | 1982-12-06 | 1984-06-16 | Nisshin Steel Co Ltd | Cold rolling method of ferritic stainless steel |
| EP0769333A1 (en) * | 1995-10-19 | 1997-04-23 | Usinor Sacilor | Method for continuously producing, in a line, rolled sheet metal strip of stainless steel with improved surface condition |
| CN1318438A (en) * | 2001-06-05 | 2001-10-24 | 宁波宝新不锈钢有限公司 | Cold rolling process of ferrite and martensitic stainless steel belt |
| CN103372567A (en) * | 2012-04-26 | 2013-10-30 | 宝山钢铁股份有限公司 | Method for producing ferritic stainless steel bands with roughened surfaces through cold continuous rolling |
| CN104471099A (en) * | 2012-06-28 | 2015-03-25 | Posco公司 | Low chrome and ferrite-based stainless steel having improved corrosion resistance and anti-ridging properties |
| CN104014588A (en) * | 2013-02-28 | 2014-09-03 | 宝钢不锈钢有限公司 | Method for producing ferrite stainless steel cold-rolled strip steel |
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