CN101817017A - Precision forming method of ultrathin stainless steel substrate for flexible product, obtained substrate and application thereof - Google Patents
Precision forming method of ultrathin stainless steel substrate for flexible product, obtained substrate and application thereof Download PDFInfo
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Abstract
The invention discloses a precision forming method of an ultrathin stainless steel substrate for a flexible product, an obtained substrate and an application thereof. The method comprises the following steps: taking a cold-rolled 2B-surface AISI300 series stainless steel band with the thickness of 0.8-1mm as a raw material, twenty-high rolling, debinding, bright annealing, secondary cold-rolling by a twenty-high roll mill, debinding, bright annealing, tension straightening, length cutting/cross cutting, inspecting, packaging and the like. The ultrathin stainless steel substrate has the grain size of 5-6 grades, uniform internal stress distribution, the thickness deviation of +/-0.002, the thickness of 0.03-0.2mm, surface roughness of Ra20nm-Ra500nm, surface evenness of 1-2I-Unit, and the yield strength of less than 200MPa. The ultrathin stainless steel substrate is applied to a flexible solar cell and a flexible display product. The invention has simple and feasible production method, low cost, high product quality and high production efficiency.
Description
Technical field
The present invention relates to a kind of method for precisely forming of ultrathin stainless steel substrate, specifically a kind of flexible solar battery and the flexible application that shows product with method for precisely forming and the base material that makes and the base material of ultrathin stainless steel substrate.
Background of invention
Flexible substrate film solar battery is meant at flexible material (as stainless steel, polyester film) goes up the battery of making, compare with the hard substrate batteries such as amorphous silicon thin-film solar cell of flat crystalline silicon, glass substrate, its maximum characteristics are in light weight, collapsible and difficult fragmentations, and has fabulous flexibility, can curl arbitrarily, cutting, stickup, both made to curve very little radius, and done hundreds of times and curl, battery performance can not change yet.Because thin-film solar cells and thin film transistor (TFT) (thin film transistor, TFT) has similar laminated construction, the main manufacturers of world's flexible substrate film solar cell such as the U.S., Europe, Japan are all based on the equipment that is used to produce thin film transistor (TFT) among the TFT-LCD at present, adopt volume to volume (the Roll to roll of automation, be called for short R2R) technology, produce the fexible film silicon solar cell.Adopt the R2R technology to prepare large area flexible substrate amorphous silicon solar cell, be convenient to large tracts of land and produce continuously, the potentiality that reduce cost are very big, have very strong competitiveness.
Frivolous, shock-resistant and bendability characteristics that flexible display has, make the design of display no longer be confined to complanation, also provide polynary external form and design, and frivolous, impact-resistant characteristic then is applicable to portable products such as mobile phone, PDA or notebook computer.In addition, another key factor of exploitation flexible display is that its technology may convert R2R to sheet (Sheet-to-Sheet) by sheet, make thin film transistor (TFT) (TFT) group on flexible parent metal, more cost-effective continuity production has economic worth to typical products in mass production.In conjunction with the characteristic of the quality similar and advantage on the engineering properties and the renewable information of digital and electronic medium to sheet properties, add the advantage of manufacturing cost, bendable musical form flexible display is very likely replaced present flat-panel screens in recent years.Similar with the situation of thin-film solar cells, present flexible display substrate mainly contains three kinds of thin glass, sheet metal and polyester film substrates.
The technical development of flexible thin-film solar cell and flexible demonstration product is had higher requirement to the selection of flexible substrate material.Than other baseplate material, but the stainless steel foil because possess high temperature resistant processing procedure, possess the function of the oxygen that blocks water, the processing procedure possibility that possesses R2R, mechanical strength height, with low cost and obtain the performance that convenience, hot coefficients match high temperature deposition obtain a series of excellences such as high-quality silicon thin film, become the baseplate material of the wide selection of current flexible solar battery and flexible display.
The used stainless steel foil base material of flexible photovoltaic and electronic device belongs to accurate stainless steel foil, and its thickness is different from conventional stainless sheet steel, and is general≤0.2mm, has the quality requirements strictness, with high content of technology.The mechanical properties such as surface roughness, surface topography, thickness and Deviation Control thereof, internal stress level and substrate yield strength of discovering baseplate material all have material impact to the R2R Technological adaptability of baseplate material and final flexible solar battery and the serviceability of flexible display device.
After the cold working of stainless steel foil band, will produce a large amount of dislocations on slide surface and the crystal boundary on the microcosmic, and cause dot matrix to produce distortion.When amount of distortion was big more, dislocation density was high more, and internal stress and lattice distortion are serious more, and metal deformation resistance and intensity, hardness etc. are increased with the distortion degree, and plasticity index percentage elongation, the contraction percentage of area reduce.Common cold rolled precision stainless steel foil band does not meet flexible solar battery and the flexible serviceability requirement that shows product with ultrathin stainless steel substrate.
Still the product report that does not have the special-purpose accurate stainless steel foil of flexible solar battery and flexible display systems baseplate material at present both at home and abroad.Only there is Chinese invention patent 200810156842.0 to introduce a kind of employing ten 4-roller cold rolling mill groups, by three methods rolling, that stainless steel band for flexible thin-film solar cell is produced in three annealing.This 14 rolling system method production cycle is long, and the surface quality of the related stainless steel foil of this invention is not clear, and the Technological adaptability of the R2R processing procedure of its flexible solar battery and flexible display systems is not true.
Summary of the invention
In order to overcome the problem that existing accurate stainless steel foil band can not fully satisfy the needs of flexible solar battery and flexible display systems baseplate material various aspects of performance, the purpose of this invention is to provide a kind of method for precisely forming of ultrathin stainless steel substrate for flexible product and base material that makes and application, this forming method is simple, cost is low, the efficient height.And the ultrathin stainless steel substrate combination property that makes is superior, fully satisfies the needs of flexible solar battery and flexible display systems baseplate material various aspects of performance.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method for precisely forming of ultrathin stainless steel substrate for flexible product is characterized in that this method for precisely forming by twice rolling ultrathin stainless steel substrate for flexible product that obtains of mill, and concrete steps are as follows:
1) raw material is prepared, and employing thickness is that the AISI300 series stainless steel band on the cold rolling 2B of the being at least surface of 0.8～1mm is a raw material;
2) it is rolling raw material to be carried out the mill once cold rolling, obtains rolling sheets just;
3) first rolling sheets is carried out the degreasing first time;
4) the first rolling sheets after the degreasing for the first time carries out the bright annealing first time;
5) it is rolling that the first rolling sheets behind the general's bright annealing first time carries out the mill secondary cold-rolling, obtains ultra-thin stainless steel sheet material;
6) the ultra-thin stainless steel sheet material that obtains is carried out the degreasing second time;
7) light sheet after the degreasing for the second time carries out the bright annealing second time;
8) the ultra-thin stainless steel sheet material behind the general's bright annealing second time carries out stretcher leveling, rip cutting/crosscut, check, packing warehouse-in, obtains the ultrathin stainless steel substrate for flexible product finished product.
In the step 5) of the present invention, the work roll surface roughness of mill is controlled at Ra0.02～0.50 μ m, mill secondary cold-rolling pass deformation rate 40～70%.
In the step 4), the bright annealing temperature is 1040 ℃～1080 ℃ for the first time, temperature retention time 10～30 minutes, protection of reducing atmosphere, cooling fast.
In the step 7), the bright annealing temperature is 1040 ℃～1080 ℃ for the second time, temperature retention time 5～10 minutes, and protection of reducing atmosphere, cooling fast, perfect recrystallization takes place in tissue, and grain size is more even, the annealing softening best results.
The base material that a kind of method for precisely forming of ultrathin stainless steel substrate for flexible product makes, it is characterized in that: ultrathin stainless steel substrate grain size 5-6 level, internal stress is evenly distributed, thickness deviation ± 0.002, thickness 0.03～0.2mm, surface roughness Ra 20nm～Ra500nm, surface smoothness 1-2I-Unit, yield strength is less than 200MPa.
The base material that a kind of method for precisely forming of ultrathin stainless steel substrate for flexible product makes is in flexible solar battery and the flexible application that shows in the product.
Because stainless steel work hardening is violent, be difficult to rollingly, adopting the multiple roll reversable mill of minor diameter working roll and hightension is the cold rolling distinguishing feature of stainless steel band.The present invention adopts international state-of-the-art Sendzimir mill, Sendzimir unit frame with enough rigidity, and outfit ABB template is measured and control system, and fully combine by the PLC technology with the AGC system, provide best a complete set of mill control system, the rolling high rigidity of energy, ultrathin accurate band steel.
Compared with prior art, production method of the present invention is simple, and cost is low, the efficient height.The ultrathin stainless steel substrate combination property that obtains is superior, fully satisfies the needs of flexible solar battery and flexible display systems baseplate material various aspects of performance.
Description of drawings
Accompanying drawing is flexible ultra-thin stainless steel substrate production process chart.
The specific embodiment
Embodiment 1
Employing thickness is that the AISI304 stainless steel band on the cold rolling 2B surface of 0.8mm is a raw material,, for the first time degreasing rolling through the mill once cold rolling, bright annealing, mill secondary cold-rolling, degreasing for the second time, operations such as bright annealing, stretcher leveling, rip cutting/crosscut, check, packing warehouse-in for the second time for the first time obtain the ultrathin stainless steel substrate for flexible product finished product.Wherein the work roll surface roughness in the mill secondary cold-rolling is Ra0.50 μ m, pass deformation rate 40%; The bright annealing temperature is 1080 ℃ for the first time, temperature retention time 15 minutes, protection of reducing atmosphere, cooling fast; The bright annealing temperature is 1060 ℃ for the second time, temperature retention time 10 minutes, protection of reducing atmosphere, cooling fast.Prepared ultrathin stainless steel substrate for flexible product grain size is 5 grades, and internal stress is evenly distributed, thickness deviation ± 0.002, thickness 0.05mm, surface roughness Ra 500nm, surface smoothness 2I-Unit, yield strength 197MPa.
Prepared ultrathin stainless steel substrate for flexible product is in flexible solar battery and the flexible application that shows in the product.
Embodiment 2
Employing thickness is that the AISI316 stainless steel band on the cold rolling 2B surface of 1mm is a raw material,, for the first time degreasing rolling through the mill once cold rolling, bright annealing, mill secondary cold-rolling, degreasing for the second time, operations such as bright annealing, stretcher leveling, rip cutting/crosscut, check, packing warehouse-in for the second time for the first time obtain the ultrathin stainless steel substrate for flexible product finished product.Wherein the work roll surface roughness in the mill secondary cold-rolling is Ra0.10 μ m, pass deformation rate 70%; The bright annealing temperature is 1050 ℃ for the first time, temperature retention time 25 minutes, protection of reducing atmosphere, cooling fast; The bright annealing temperature is 1040 ℃ for the second time, temperature retention time 9 minutes, protection of reducing atmosphere, cooling fast.Prepared ultrathin stainless steel substrate for flexible product grain size is 6 grades, and internal stress is evenly distributed, thickness deviation ± 0.002, thickness 0.1mm, surface roughness Ra 100nm, surface smoothness 2I-Unit, yield strength 194MPa.
Prepared ultrathin stainless steel substrate for flexible product is in flexible solar battery and the flexible application that shows in the product.
Embodiment 3
Employing thickness is that the AISI301 stainless steel band on the cold rolling 2B surface of 0.8mm is a raw material,, for the first time degreasing rolling through the mill once cold rolling, bright annealing, mill secondary cold-rolling, degreasing for the second time, operations such as bright annealing, stretcher leveling, rip cutting/crosscut, check, packing warehouse-in for the second time for the first time obtain the ultrathin stainless steel substrate for flexible product finished product.Wherein the work roll surface roughness in the mill secondary cold-rolling is controlled at Ra0.02 μ m, pass deformation rate 65%; The bright annealing temperature is 1070 ℃ for the first time, temperature retention time 15 minutes, protection of reducing atmosphere, cooling fast; The second light time annealing temperature is 1060 ℃, temperature retention time 10 minutes, protection of reducing atmosphere, cooling fast.Prepared ultrathin stainless steel substrate for flexible product grain size is 6 grades, and internal stress is evenly distributed, thickness deviation ± 0.001, thickness 0.03mm, surface roughness Ra 25nm, surface smoothness 2I-Unit, yield strength 190MPa.
Prepared ultrathin stainless steel substrate for flexible product is in flexible solar battery and the flexible application that shows in the product.
Production method of the present invention is simple, and cost is low, the efficient height. The ultrathin stainless steel substrate combination property that obtains is superior, fully satisfies the needs of flexible solar battery and flexible display systems baseplate material various aspects of performance.
Claims (6)
1. the method for precisely forming of a ultrathin stainless steel substrate for flexible product is characterized in that this method for precisely forming by twice rolling ultrathin stainless steel substrate for flexible product that obtains of mill, and concrete steps are as follows:
1) raw material is prepared, and employing thickness is that the AISI300 series stainless steel band on the cold rolling 2B of the being at least surface of 0.8～1mm is a raw material;
2) it is rolling raw material to be carried out the mill once cold rolling, obtains rolling sheets just;
3) first rolling sheets is carried out the degreasing first time;
4) the first rolling sheets after the degreasing for the first time carries out the bright annealing first time;
5) it is rolling that the first rolling sheets behind the general's bright annealing first time carries out the mill secondary cold-rolling, obtains ultra-thin stainless steel sheet material;
6) the ultra-thin stainless steel sheet material that obtains is carried out the degreasing second time;
7) light sheet after the degreasing for the second time carries out the bright annealing second time;
8) the ultra-thin stainless steel sheet material behind the general's bright annealing second time carries out stretcher leveling, rip cutting/crosscut, check, packing warehouse-in, obtains the ultrathin stainless steel substrate for flexible product finished product.
2. the method for precisely forming of ultrathin stainless steel substrate for flexible product according to claim 1, it is characterized in that: in the step 5), the work roll surface roughness of mill is controlled at Ra0.02～0.50 μ m, mill secondary cold-rolling pass deformation rate 40～70%.
3. the method for precisely forming of ultrathin stainless steel substrate for flexible product according to claim 1 is characterized in that: in the step 4), the bright annealing temperature is 1040 ℃～1080 ℃ for the first time, temperature retention time 10～30 minutes, protection of reducing atmosphere, cooling fast.
4. the method for precisely forming of ultrathin stainless steel substrate for flexible product according to claim 1 is characterized in that: in the step 7), the bright annealing temperature is 1040 ℃～1080 ℃ for the second time, temperature retention time 5～10 minutes, protection of reducing atmosphere, cooling fast.
5. the base material that makes of the method for precisely forming of the described ultrathin stainless steel substrate for flexible product of claim 1, it is characterized in that: ultrathin stainless steel substrate grain size 5-6 level, internal stress is evenly distributed, thickness deviation ± 0.002, thickness 0.03～0.2mm, surface roughness Ra 20nm～Ra500nm, surface smoothness 1-2I-Unit, yield strength is less than 200MPa.
6. the base material that makes of the method for precisely forming of the described ultrathin stainless steel substrate for flexible product of claim 1 is in flexible solar battery and the flexible application that shows in the product.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284481A (en) * | 2011-06-17 | 2011-12-21 | 永鑫精密材料（无锡）有限公司 | Production process for performing cold-rolling on extremely-thin deep-punching steel belt |
| CN102974611A (en) * | 2012-11-28 | 2013-03-20 | 上海实达精密不锈钢有限公司 | Method for forming stainless steel precision steel strip of flexible solar cell substrate |
| CN103667652A (en) * | 2013-11-30 | 2014-03-26 | 无锡宝顺不锈钢有限公司 | Production method of stainless steel belt for electronic film |
| CN105483714A (en) * | 2015-11-30 | 2016-04-13 | 中国航空工业集团公司北京航空材料研究院 | Treatment method of stainless steel base material for film lithium battery |
| CN105537268A (en) * | 2015-12-15 | 2016-05-04 | 安徽伟宏钢结构集团股份有限公司 | Cold rolling process of precise stainless steel band for steel structure building |
| CN108246826A (en) * | 2018-01-16 | 2018-07-06 | 浙江甬金金属科技股份有限公司 | The production method of desulphurization denitration environmental protection equipment Special precision stainless steel band |
| CN108620447A (en) * | 2018-04-30 | 2018-10-09 | 江苏延汉材料科技有限公司 | A kind of processing technology of superconduction base band |
| CN110238193A (en) * | 2019-06-21 | 2019-09-17 | 山西太钢不锈钢精密带钢有限公司 | Ultra-thin ultra-wide rolling stainless steel band technique |
| CN110404968A (en) * | 2019-08-01 | 2019-11-05 | 山西太钢不锈钢精密带钢有限公司 | The manufacturing method of the super flat material of ultra-thin stainless steel |
| CN111974799A (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 strip with dotted matte DR surface |
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Cited By (16)
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|---|---|---|---|---|
| CN102284481A (en) * | 2011-06-17 | 2011-12-21 | 永鑫精密材料（无锡）有限公司 | Production process for performing cold-rolling on extremely-thin deep-punching steel belt |
| CN102284481B (en) * | 2011-06-17 | 2014-12-17 | 永鑫精密材料（无锡）有限公司 | Production process for performing cold-rolling on extremely-thin deep-punching steel belt |
| CN102974611A (en) * | 2012-11-28 | 2013-03-20 | 上海实达精密不锈钢有限公司 | Method for forming stainless steel precision steel strip of flexible solar cell substrate |
| CN102974611B (en) * | 2012-11-28 | 2015-07-08 | 上海实达精密不锈钢有限公司 | Method for forming stainless steel precision steel strip of flexible solar cell substrate |
| CN103667652A (en) * | 2013-11-30 | 2014-03-26 | 无锡宝顺不锈钢有限公司 | Production method of stainless steel belt for electronic film |
| CN103667652B (en) * | 2013-11-30 | 2016-01-06 | 无锡宝顺不锈钢有限公司 | The production method of electric thin Stainless Steel Band |
| CN105483714A (en) * | 2015-11-30 | 2016-04-13 | 中国航空工业集团公司北京航空材料研究院 | Treatment method of stainless steel base material for film lithium battery |
| CN105483714B (en) * | 2015-11-30 | 2017-12-15 | 中国航空工业集团公司北京航空材料研究院 | A kind of processing method of film lithium cell stainless steel substrate |
| CN105537268B (en) * | 2015-12-15 | 2017-10-24 | 安徽伟宏钢结构集团股份有限公司 | A kind of precise stainless steel strip cold-rolling process for steel building |
| CN105537268A (en) * | 2015-12-15 | 2016-05-04 | 安徽伟宏钢结构集团股份有限公司 | Cold rolling process of precise stainless steel band for steel structure building |
| CN108246826A (en) * | 2018-01-16 | 2018-07-06 | 浙江甬金金属科技股份有限公司 | The production method of desulphurization denitration environmental protection equipment Special precision stainless steel band |
| CN108620447A (en) * | 2018-04-30 | 2018-10-09 | 江苏延汉材料科技有限公司 | A kind of processing technology of superconduction base band |
| CN110238193A (en) * | 2019-06-21 | 2019-09-17 | 山西太钢不锈钢精密带钢有限公司 | Ultra-thin ultra-wide rolling stainless steel band technique |
| CN110238193B (en) * | 2019-06-21 | 2020-12-08 | 山西太钢不锈钢精密带钢有限公司 | Ultra-thin ultra-wide stainless steel band rolling process |
| CN110404968A (en) * | 2019-08-01 | 2019-11-05 | 山西太钢不锈钢精密带钢有限公司 | The manufacturing method of the super flat material of ultra-thin stainless steel |
| CN111974799A (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 strip with dotted matte DR surface |
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