CN102671939A - Production method of 304L precise stainless steel belt - Google Patents
Production method of 304L precise stainless steel belt Download PDFInfo
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- CN102671939A CN102671939A CN2012101479832A CN201210147983A CN102671939A CN 102671939 A CN102671939 A CN 102671939A CN 2012101479832 A CN2012101479832 A CN 2012101479832A CN 201210147983 A CN201210147983 A CN 201210147983A CN 102671939 A CN102671939 A CN 102671939A
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Abstract
The invention relates to a production method of a 304L precise stainless steel belt for flux-cored wires. The production method comprises the following procedures of: cold rolling, degreasing, cleaning, solid solution, bending, straightening, longitudinal cutting of finished products and the like. The production method has the advantages that a SUNDWIG four-vertical-column twenty-roll mill and unique rolling and annealing processes are adopted for rolling and solid solution, and by virtue of the processes of degreasing, cleaning, bending and straightening and the like, a product is less in thickness-tolerance fluctuation, stable in stretch property and good in plate-shape flatness, and has less possibility of generating cracks and secondary defects in stampling, so that the quality of the product is obviously improved. The production method is applicable to industrial large-scale production and meets the high-quality requirement in the industry of the 304L precise stainless steel belt for the flux-cored wires.
Description
Technical field:
Product of the present invention belongs to the raw material of making flux-cored wire, relates to the production method of the precise stainless steel strip of a kind of 304L.
Background technology:
Manufacturing flux-cored wire at present all is to utilize multi-roll mill to be rolled with the 304L precise stainless steel strip; And adopt other auxiliary equipment to improve plate shape glacing flatness; But the stainless steel band that adopts existing technology to process exists that the width tolerance fluctuation is big, burr height is big, extension property is unstable, plate shape glacing flatness is bad, in process, is easy to generate crackle, secondary deformation and shortcoming such as scraps.
Summary of the invention:
The objective of the invention is to overcome the deficiency that prior art exists; Provide a kind of and can produce that thickness deviation fluctuation is little, burr height is little, the width tolerance fluctuation is little, extension property stable, plate shape is straight; When punch process, be difficult for cracking, secondary deformation, satisfy the production method of flux-cored wire with the precise stainless steel strip of the high-quality requirement of 304L.
Technical scheme of the present invention comprises the steps:
1, adopts the stainless-steel cold-rolling volume 304L raw material (Composition Control is special) of thickness 0.8-1.2mm; Carry out breaking down at SUNDWIG four column mills; Through the strict control of thickness control system product thickness tolerance, used lubricating and cooling agent is a ROLLING OIL when cold rolling when rolling, and oily temperature control is made as 35-45 ℃; Operation roll of mill roll surface roughness Ra0.25～0.35um is cold-rolled to 0.3～0.42mm finished product thickness through multi-pass.For guaranteeing product surface quality, the first passage mill speed can be controlled in 80～100m/min, with the thickness fluctuation of observation raw material surface quality and supplied materials.Pony-roughing pass speed can be increased to 300～400m/min afterwards; Conscientiously check surface quality before the end product passage is rolling, use working roll roughness Ra0.35～0.45um instead, mill speed is controlled at 200～300m/min, causes galled spots, the pad process paper for preventing the changing of the relative positions of coil of strip interlayer.
2, the coil of strip after the cold rolling completion need pass through cleaning by degreasing, at first carries out spray degreasing and handles, and the degreasing agent of spray degreasing liquid becomes the degreaser of 10g/l～12 g/l with the water proportioning; The degreaser temperature is 75～85 ℃, and steel band carries out the demineralized water spray Cleaning for High Capacity of heat behind spray degreasing, and the desalination water temperature is 50～60 ℃ during spray Cleaning for High Capacity; Spray back steel band is through the hot wind drying room oven dry; The drying chamber temperature is 95～105 ℃, and during this period, steel belt operating speed is controlled at 30～40m/min;
3, the coil of strip after the cleaning by degreasing is carried out solution treatment through a temperature at 1020～1150 ℃ vertical bright continuous annealing furnace with the speed of 30～35m/min, and be high-purity (99.999%) perhydro gas shiled gas in the Muffle furnace cover of vertical bright annealing furnace; The annealing back needs to prevent that batching back pad process paper the changing of the relative positions causes surface tear between the invar belt to for guaranteeing product surface quality.
4, adopt the straightening machine have the control of template appearance to carry out stretch-bending straightening to the steel band after the solution treatment, take constant roll gap, extend the method for control, elongation control is 0.3～0.8%, the speed of service 100～120m/min;
5, rip cutting unit on the steel band behind the stretch-bending straightening is cut into the finished product of various width requirements.
The present invention adopts that SUNDWIG four column mills and unique rolling, annealing process are rolled, solution treatment, and through technologies such as cleaning by degreasing, stretch-bending straightenings, makes the product thickness tolerance variations little; Extension property is stable; Plate shape good straightness degree is difficult for during punching press cracking, secondary defect, and product quality significantly promotes; And be applicable to industrialized production, satisfy flux-cored wire with the high-quality requirement of the industry of 304L.
The specific embodiment:
Below in conjunction with the practical implementation case, further set forth the present invention.It is emphasized that these cases only are used to explain the present invention, and and the unrestricted scope of application of the present invention.In addition, after the content of having read the present invention's instruction, those skilled in the art can make various changes or modification to the present invention, but these equivalent form of values fall within the appended all one's effort claim of the application institute restricted portion equally.
Concrete case 1
Selecting thickness for use is that the 304L cold rolled stainless steel coils of 1.0mm, width 610mm is a raw material, and finished product steel belt thickness is 0.41mm after cold rolling.
At first the stainless-steel cold-rolling volume raw material to thickness 1.0mm adopts SUNDWIG four column mills to be rolled, and adopts Britain BP ROLLING OIL to be lubricated cooling when rolling, and the temperature of ROLLING OIL is 40 ℃; Be cold-rolled to 0.41mm through 5 passages, the first passage mill speed is 80m/min, working roll roll surface roughness Ra0.3um; The pony-roughing pass mill speed is 300m/min afterwards; Mill speed 200m/min during final pass, working roll roll surface roughness Ra0.4um, pad process paper.
Coil of strip after the cold rolling completion carries out spray degreasing with the speed of 32m/min to be handled; The degreasing agent of spray degreasing liquid becomes the degreaser of 10g/l～12 g/l with the water proportioning; The degreaser temperature is 75 ℃, and steel band carries out the demineralized water spray Cleaning for High Capacity of heat behind spray degreasing, and the desalination water temperature is 60 ℃ during spray Cleaning for High Capacity; Spray back steel band is through the hot wind drying room oven dry, and the drying chamber temperature is 100 ℃;
Be to carry out solution treatment in 1130 ℃ ± 5 ℃ the vertical continuous bright annealing furnace through a temperature with the steel band after the cleaning by degreasing with the speed of 32m/min; And the perhydro gas shiled gas of employing high-purity (99.999%); Make steel strip surface not oxidized; Pad process paper when batching prevents that the interlayer changing of the relative positions from causing galled spots;
Adopt the straightening machine have the control of template appearance to carry out stretch-bending straightening to the steel band after the solution treatment, take constant roll gap, extend the method for control, elongation control is 0.3%, speed of service 110m/min;
Steel band behind the stretch-bending straightening is cut into the finished product of various width requirements.
Adopt the product of above-mentioned explained hereafter, its key technical indexes can reach:
1) thickness deviation: 0.41 ± 0.005mm;
2) hardness (H): (155～165) HV0.5;
3) tensile strength (Rm): (550～600) MPa;
4) percentage elongation (A): 45～55%;
5) unevenness :≤0.25mm.
Concrete case 2
Selecting thickness for use is that the 304L cold rolled stainless steel coils of 1.0mm, width 610mm is a raw material, and finished product steel belt thickness is 0.41mm after cold rolling.
At first the stainless-steel cold-rolling volume raw material to thickness 1.0mm adopts SUNDWIG four column mills to be rolled, and adopts Britain BP ROLLING OIL to be lubricated cooling when rolling, and the temperature of ROLLING OIL is 38 ℃; Be cold-rolled to 0.41mm through 5 passages, the first passage mill speed is 90m/min, working roll roll surface roughness Ra0.3um; The pony-roughing pass mill speed is 300m/min afterwards; Mill speed 245m/min during final pass, working roll roll surface roughness Ra0.45um, pad process paper.
Coil of strip after the cold rolling completion carries out spray degreasing with the speed of 33m/min to be handled; The degreasing agent of spray degreasing liquid becomes the degreaser of 10g/l～12 g/l with the water proportioning; The degreaser temperature is 75 ℃, and steel band carries out the demineralized water spray Cleaning for High Capacity of heat behind spray degreasing, and the desalination water temperature is 60 ℃ during spray Cleaning for High Capacity; Spray back steel band is through the hot wind drying room oven dry, and the drying chamber temperature is 100 ℃;
Be to carry out solution treatment in 1140 ℃ ± 5 ℃ the vertical continuous bright annealing furnace through a temperature with the steel band after the cleaning by degreasing with the speed of 33m/min; And the perhydro gas shiled gas of employing high-purity (99.999%); Make steel strip surface not oxidized; Pad process paper when batching prevents that the interlayer changing of the relative positions from causing galled spots;
Adopt the straightening machine have the control of template appearance to carry out stretch-bending straightening to the steel band after the solution treatment, take constant roll gap, extend the method for control, elongation control is 0.35%, speed of service 120m/min;
Steel band behind the stretch-bending straightening is cut into the finished product of various width requirements.
Adopt the product of above-mentioned explained hereafter, its key technical indexes can reach:
1) thickness deviation: 0.41 ± 0.007mm;
2) hardness (H): (155～165) HV0.5;
3) tensile strength (Rm): (550～600) MPa;
4) percentage elongation (A): 45～55%;
5) unevenness :≤0.3mm.
Concrete case 3
Selecting thickness for use is that the 304L cold rolled stainless steel coils of 1.0mm, width 610mm is a raw material, and finished product steel belt thickness is 0.36mm after cold rolling.
At first the stainless-steel cold-rolling volume raw material to thickness 1.0mm adopts SUNDWIG four column mills to be rolled, and adopts Britain BP ROLLING OIL to be lubricated cooling when rolling, and the temperature of ROLLING OIL is 38 ℃; Be cold-rolled to 0.36mm through 6 passages, the first passage mill speed is 90m/min, working roll roll surface roughness Ra0.3um; The pony-roughing pass mill speed is 300m/min afterwards; Mill speed 220m/min during final pass, working roll roll surface roughness Ra0.40um, pad process paper.
Coil of strip after the cold rolling completion carries out spray degreasing with the speed of 32m/min to be handled; The degreasing agent of spray degreasing liquid becomes the degreaser of 10g/l～12 g/l with the water proportioning; The degreaser temperature is 75 ℃, and steel band carries out the demineralized water spray Cleaning for High Capacity of heat behind spray degreasing, and the desalination water temperature is 60 ℃ during spray Cleaning for High Capacity; Spray back steel band is through the hot wind drying room oven dry, and the drying chamber temperature is 100 ℃;
Be to carry out solution treatment in 1120 ℃ ± 5 ℃ the vertical continuous bright annealing furnace through a temperature with the steel band after the cleaning by degreasing with the speed of 32m/min; And the perhydro gas shiled gas of employing high-purity (99.999%); Make steel strip surface not oxidized; Pad process paper when batching prevents that the interlayer changing of the relative positions from causing galled spots;
Adopt the straightening machine have the control of template appearance to carry out stretch-bending straightening to the steel band after the solution treatment, take constant roll gap, extend the method for control, elongation control is 0.30%, speed of service 120m/min;
Steel band behind the stretch-bending straightening is cut into the finished product of various width requirements.
Adopt the product of above-mentioned explained hereafter, its key technical indexes can reach:
1) thickness deviation: 0.36 ± 0.005mm;
2) hardness (H): (155～165) HV0.5;
3) tensile strength (Rm): (550～600) MPa;
4) percentage elongation (A): 45～55%;
5) unevenness :≤0.25mm.
Claims (1)
1. the production method of a 304L precise stainless steel strip comprises cold rolling, cleaning by degreasing, solid solution, stretch-bending straightening, rip cutting finished product operation, it is characterized in that comprising the steps:
(1), adopting thickness is that the stainless-steel cold-rolling volume 304L of 0.8-1.2mm is as raw material; It is cold rolling to carry out the first time at SUNDWIG four column mills; Used lubricating and cooling agent is a ROLLING OIL when cold rolling, and oily temperature control is made as 35-45 ℃, operation roll of mill roll surface roughness Ra0.25～0.35um; The first passage mill speed can be controlled in 80～100m/min, and pony-roughing pass speed is 300～400m/min; The rolling working roll roughness Ra0.35～0.45um that uses instead of end product passage, mill speed is 200～300m/min, is cold-rolled to 0.3～0.42mm finished product thickness through multi-pass;
(2), the coil of strip after the cold rolling completion at first carries out spray degreasing and handles, the degreasing agent of spray degreasing liquid becomes the degreaser of 10g/l～12 g/l with the water proportioning, the degreaser temperature is 75～85 ℃; Steel band carries out the demineralized water spray Cleaning for High Capacity of heat behind spray degreasing; The desalination water temperature is 50～60 ℃ during spray Cleaning for High Capacity, and spray back steel band is through the hot wind drying room oven dry, and the drying chamber temperature is 95～105 ℃; During this period, steel belt operating speed is controlled at 30～40m/min;
(3), the coil of strip after the cleaning by degreasing is carried out solution treatment through a temperature at 1020～1150 ℃ vertical bright continuous annealing furnace with the speed of 30～35m/min, and be perhydro gas shiled gas in the Muffle furnace cover of vertical bright annealing furnace;
(4), adopt the straightening machine have the control of template appearance to carry out stretch-bending straightening, take constant roll gap, extend the method for control, elongation control is 0.3～0.8%, the speed of service 100～120m/min to the steel band after the solution treatment;
(5), rip cutting unit on the steel band behind the stretch-bending straightening is cut into the finished product of various width requirements.
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| CN2012101479832A CN102671939A (en) | 2012-05-14 | 2012-05-14 | Production method of 304L precise stainless steel belt |
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| CN2012101479832A CN102671939A (en) | 2012-05-14 | 2012-05-14 | Production method of 304L precise stainless steel belt |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106424195A (en) * | 2016-12-01 | 2017-02-22 | 浙江东南金属薄板有限公司 | Cold-rolling strip steel production process |
| CN107891064A (en) * | 2017-10-23 | 2018-04-10 | 山西太钢不锈钢股份有限公司 | A kind of production method for improving stainless steel surfaces quality |
| CN107900102A (en) * | 2017-10-23 | 2018-04-13 | 山西太钢不锈钢股份有限公司 | A kind of production method of low reflective surface stainless steel |
| CN109332377A (en) * | 2018-08-27 | 2019-02-15 | 山西太钢不锈钢精密带钢有限公司 | 301 accurate band steel production technologies of cylinder liner |
| CN109420679A (en) * | 2017-08-21 | 2019-03-05 | 杰富意钢铁株式会社 | The manufacturing method and manufacturing equipment of ferrite-group stainless steel cold-rolled strip and the cold-rolling mill of ferrite-group stainless steel steel band |
| CN110328233A (en) * | 2019-06-14 | 2019-10-15 | 山西太钢不锈钢精密带钢有限公司 | Metal dome ultra-thin accurate strip production technology |
| CN111185494A (en) * | 2020-03-06 | 2020-05-22 | 天津冶金集团天材科技发展有限公司 | Stretch bending and straightening process of stainless steel cold-rolled strip |
| CN111974800A (en) * | 2020-08-07 | 2020-11-24 | 无锡华生精密材料股份有限公司 | Production method of stainless steel band with bright RA surface |
| CN112275806A (en) * | 2020-08-27 | 2021-01-29 | 山西太钢不锈钢精密带钢有限公司 | Production process of high-elongation 316L precision strip steel for Type-C connector |
| CN112974522A (en) * | 2021-02-22 | 2021-06-18 | 山西太钢不锈钢精密带钢有限公司 | Production method for improving corrosion resistance and reducing pipe breakage rate of precision strip steel for heating pipe |
| CN113441548A (en) * | 2021-07-01 | 2021-09-28 | 永鑫精密材料（无锡）有限公司 | Production method of short-drawn high-gloss surface precision stainless steel band for electronic industry |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09155402A (en) * | 1995-12-05 | 1997-06-17 | Nippon Steel Corp | Process line operation method of steel strip |
| CN101033499A (en) * | 2007-04-19 | 2007-09-12 | 无锡华生精密合金材料有限公司 | Method of producing stainless steel band for air injection steel reed |
| CN101259483A (en) * | 2008-02-18 | 2008-09-10 | 宁波永正精密不锈钢有限公司 | Production method of hard state 304 precision stainless steel band |
| CN101716595A (en) * | 2009-12-11 | 2010-06-02 | 永鑫精密材料（无锡）有限公司 | Process for producing accurate stainless steel band applied in electronic industry |
| CN101716594A (en) * | 2009-12-11 | 2010-06-02 | 永鑫精密材料（无锡）有限公司 | Production process of precise stainless steel band for vehicle sealing pad |
| CN101748256A (en) * | 2010-01-15 | 2010-06-23 | 山西太钢不锈钢股份有限公司 | Rolling and solution treatment method for 304 stainless strip steel |
-
2012
- 2012-05-14 CN CN2012101479832A patent/CN102671939A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09155402A (en) * | 1995-12-05 | 1997-06-17 | Nippon Steel Corp | Process line operation method of steel strip |
| CN101033499A (en) * | 2007-04-19 | 2007-09-12 | 无锡华生精密合金材料有限公司 | Method of producing stainless steel band for air injection steel reed |
| CN101259483A (en) * | 2008-02-18 | 2008-09-10 | 宁波永正精密不锈钢有限公司 | Production method of hard state 304 precision stainless steel band |
| CN101716595A (en) * | 2009-12-11 | 2010-06-02 | 永鑫精密材料（无锡）有限公司 | Process for producing accurate stainless steel band applied in electronic industry |
| CN101716594A (en) * | 2009-12-11 | 2010-06-02 | 永鑫精密材料（无锡）有限公司 | Production process of precise stainless steel band for vehicle sealing pad |
| CN101748256A (en) * | 2010-01-15 | 2010-06-23 | 山西太钢不锈钢股份有限公司 | Rolling and solution treatment method for 304 stainless strip steel |
Non-Patent Citations (1)
| Title |
|---|
| 张文基: "SUNDWIG四立柱20辊轧机特性分析", 《冶金设备》, no. 6, 31 December 2008 (2008-12-31) * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106424195A (en) * | 2016-12-01 | 2017-02-22 | 浙江东南金属薄板有限公司 | Cold-rolling strip steel production process |
| CN109420679A (en) * | 2017-08-21 | 2019-03-05 | 杰富意钢铁株式会社 | The manufacturing method and manufacturing equipment of ferrite-group stainless steel cold-rolled strip and the cold-rolling mill of ferrite-group stainless steel steel band |
| CN107891064A (en) * | 2017-10-23 | 2018-04-10 | 山西太钢不锈钢股份有限公司 | A kind of production method for improving stainless steel surfaces quality |
| CN107900102A (en) * | 2017-10-23 | 2018-04-13 | 山西太钢不锈钢股份有限公司 | A kind of production method of low reflective surface stainless steel |
| CN107900102B (en) * | 2017-10-23 | 2019-05-03 | 山西太钢不锈钢股份有限公司 | A kind of production method of low reflective surface stainless steel |
| CN109332377A (en) * | 2018-08-27 | 2019-02-15 | 山西太钢不锈钢精密带钢有限公司 | 301 accurate band steel production technologies of cylinder liner |
| CN110328233A (en) * | 2019-06-14 | 2019-10-15 | 山西太钢不锈钢精密带钢有限公司 | Metal dome ultra-thin accurate strip production technology |
| CN111185494A (en) * | 2020-03-06 | 2020-05-22 | 天津冶金集团天材科技发展有限公司 | Stretch bending and straightening process of stainless steel cold-rolled strip |
| CN111185494B (en) * | 2020-03-06 | 2021-06-18 | 天津冶金集团天材科技发展有限公司 | Stretch bending and straightening process of stainless steel cold-rolled strip |
| CN111974800A (en) * | 2020-08-07 | 2020-11-24 | 无锡华生精密材料股份有限公司 | Production method of stainless steel band with bright RA surface |
| CN111974800B (en) * | 2020-08-07 | 2022-09-16 | 无锡华生精密材料股份有限公司 | Production method of stainless steel band with bright RA surface |
| CN112275806A (en) * | 2020-08-27 | 2021-01-29 | 山西太钢不锈钢精密带钢有限公司 | Production process of high-elongation 316L precision strip steel for Type-C connector |
| CN112974522A (en) * | 2021-02-22 | 2021-06-18 | 山西太钢不锈钢精密带钢有限公司 | Production method for improving corrosion resistance and reducing pipe breakage rate of precision strip steel for heating pipe |
| CN113441548A (en) * | 2021-07-01 | 2021-09-28 | 永鑫精密材料（无锡）有限公司 | Production method of short-drawn high-gloss surface precision stainless steel band for electronic industry |
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Application publication date: 20120919 |