CN105665467A - Method for rolling and low-temperature destressing of stainless steel for mobile phone - Google Patents
Method for rolling and low-temperature destressing of stainless steel for mobile phone Download PDFInfo
- Publication number
- CN105665467A CN105665467A CN201610036105.1A CN201610036105A CN105665467A CN 105665467 A CN105665467 A CN 105665467A CN 201610036105 A CN201610036105 A CN 201610036105A CN 105665467 A CN105665467 A CN 105665467A
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- rolling
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- annealing
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- band steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a method for rolling and low-temperature destressing of stainless steel for a mobile phone. The method includes the following steps of firstly, cold rolling 2B; secondly, rolling, wherein multiple passes of rolling are conducted on the strip steel, the rolling speed ranges from 80 meters/minute to 100 meters/minute, and the tension difference generated in the rolling process is controlled within the range of 10 kN to 30 kN, and a working roller with the diameter being 85 mm is used; thirdly, degreasing, wherein degreasing treatment is conducted on the rolled strip steel; fourthly, low-temperature annealing, wherein the strip steel obtained after degreasing treatment is subjected to low-temperature annealing treatment, the temperature of an annealing plate for low-temperature annealing ranges from 1,000 DEG C to 1,020 DEG C, and the annealing T.V value is 140, wherein T represents the strip steel thickness, and V represents the strip steel annealing speed; fifthly, drawing and straightening, wherein drawing and straightening are conducted on the strip steel obtained after lower-temperature annealing is conducted; sixthly, cutting; and seventhly, slitting, stamping and sample etching. By adjusting the hardening tempering and rolling process, hardening, tempering and rolling with the total deformation rate ranging from 10% to 15% are achieved, the yield strength, the plate shape and the surface quality all meet the user requirements, and after low-temperature destressing is conducted, residual stress is lowered to the minimum, and non-deformation of etching is guaranteed.
Description
Technical field
The present invention relates to stainless steel process field technology, refer in particular to the rolling of a kind of mobile phone stainless steel and the method for low temperature destressing.
Background technology
SUS304TA is mainly used in the support of smart mobile phone on plate, meeting under mobile phone intensity and thinness and fabrication process condition, can effectively reduce mobile phone thickness, it is achieved mobile phone is efficiently assembled and reduced costs. Use position different according to it, 304TA can be divided into again1/2H and 304TA3/4H two kinds of intensity ranks. Wherein1/2The SUS304TA material of H intensity rank, yield strength requires to be greater than more than 470MPa, and production difficulty is quite big. For realizing high strength, the processing parameters such as the annealing temperature before and after skin-pass, annealing speed, rolling tensile force, rolling deformation rate need to be carried out strict control and management. In addition, for controlling plate type well, reduce the unrelieved stress of band steel, it is convenient to user and divides bar shaping, roll speed also to be limited.
SUS304TA3/4H yield strength requires to control at more than 667MPa. For making SUS304TA3/4H reaches intensity high like this, keeps again etching not to be out of shape, and rolling and low temperature annealing process are crucial, and the total deformation rate of general rolling controls between 10-15%. Total deformation rate is too low, and intensity does not reach requirement, and total deformation rate is too high, and intensity exceedes certain limit, is unfavorable for machine-shaping, so the yield strength upper limit is generally limited to about 780MPa.
But, after being processed by stainless steel according to current treatment process, its intensity fails to reach requirement, and unrelieved stress is relatively big, causes etching easy distortion.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, its main purpose is to provide the rolling of a kind of mobile phone stainless steel and the method for low temperature destressing, and it can effectively solve existing stainless steel insufficient strength and unrelieved stress causes etching greatly the problem being easily out of shape.
For achieving the above object, the present invention adopts following technical scheme:
The rolling of mobile phone stainless steel and a method for low temperature destressing, include following step:
(1) cold rolling 2B: get band steel, and band steel is carried out cold rolling so that it is formed with mist face on the surface of band steel;
(2) rolling: band steel is carried out multi-pass rolling, roll speed is 80-100 m/min, and before and after in the operation of rolling, Tension Difference controls at 10-30kN; And use the working roll of diameter 85mm;
(3) degreasing: the band steel after rolling is carried out skimming treatment;
(4) low-temperature annealing: the band steel after skimming treatment is carried out low-temperature annealing process, the annealed sheet temperature of low-temperature annealing is 1000-1020 DEG C, and annealing T V value is 140; Wherein T is belt steel thickness, and V is band steel annealing speed;
(5) straightening: the band steel after low-temperature annealing is carried out straightening process;
(6) shear;
(7) punching press is cut, etching sample.
As a kind of preferred version, described band steel is SUS304TA1/2H and H304TA3/4H。
As a kind of preferred version, in described step (5), the unit elongation of straightening is 0.55%.
The present invention compared with prior art has obvious advantage and useful effect, specifically, as shown from the above technical solution:
The present invention is by adjustment skin-pass technique, it is achieved that total deformation rate is the skin-pass of 10-15%, and yield strength, plate type, surface quality all reach user's requirement, and after low temperature destressing, unrelieved stress is down to minimum, ensures that etching is not out of shape.
Embodiment
The present invention discloses the rolling of a kind of mobile phone stainless steel and the method for low temperature destressing, includes following step:
(1) cold rolling 2B: get band steel, and band steel is carried out cold rolling so that it is formed with mist face on the surface of band steel; Described band steel is SUS304TA1/2H and H304TA3/4H。
(2) rolling: band steel is carried out multi-pass rolling, roll speed is 80-100 m/min, can reduce unrelieved stress, can ensure again rolling plate type (minimum speed of plate type automatic control system work is generally 60 ms/min); Before and after in the operation of rolling, Tension Difference controls at 10-30kN, avoids owing to front and back Tension Difference is big, and rolling pressure is little, and working roll is cannot kept under control band steel and produced to skid; And use the working roll of diameter 85mm, to increase the snap-in force with belt steel surface, avoid skidding.
(3) degreasing: the band steel after rolling is carried out skimming treatment.
(4) low-temperature annealing: the band steel after skimming treatment is carried out low-temperature annealing process, the annealed sheet temperature of low-temperature annealing is 1000-1020 DEG C, and annealing T V(T is multiplied by V) value is 140; Wherein T is belt steel thickness, and V is band steel annealing speed.
(5) straightening: the band steel after low-temperature annealing is carried out straightening process. The unit elongation of straightening is 0.55%.
(6) shear.
(7) punching press is cut, etching sample.
Below by embodiment, the present invention is described further, but it is not limited to following examples.
Embodiment 1:
Steel grade: SUS304TA3/4H
Raw thickness: 0.6mm finished product thickness: 0.4mm width: 360mm.
A kind of mobile phone stainless steel SUS304TA that the present embodiment provides3/4The rolling method of H, comprises the following steps:
(1) cold rolling 2B:
Rewinding speed: 80m/ minute
Rewinding tension force: 180KN
Lining paper: entire volume
(2) rolling:
First rolling process is rolled to 0.4mm by 0.6mm
(3) degreasing:
Temperature: 63 DEG C; Grease-removing agent specific conductivity: 12ms/cm.
(4) low-temperature annealing:
4 Ge Wen districts: 800 DEG C, 820 DEG C, 830 DEG C, 800 DEG C.
Speed: 3.5m/ minute
Stove internal tension: 80KN
Stove pressure: 1.5mpa.
(5) straightening:
Unit elongation: 0.55%.
(6) shear:
Shear by user's mould width design requirement, it is desired to surface must not have wipes defects such as drawing wound, roll marks.
(7) punching press etching sample is cut:
Etch depth: 0.15mm;
Etched width: 20mm;
Length of etch: 100mm;
Longitudinal direction, laterally each one, before and after etching, planeness changes, and within 0.1mm, reaches customer requirement.
Detected result: yield strength reaches 667MPa; Plate type is straight, surface good; The distortion modification caused without unrelieved stress after the present embodiment product is cut into little bar.
Embodiment 2:
Steel grade: SUS304TA1/2H。
Raw thickness: 0.5mm finished product thickness: 0.4mm width: 360mm.
A kind of mobile phone stainless steel SUS304TA that the present embodiment provides1/2The rolling method of H, comprises the following steps:
(1) cold rolling 2B:
Rewinding speed: 80m/ minute
Rewinding tension force: 180KN
Lining paper: entire volume
(2) rolling:
First rolling process is rolled to 0.4mm by 0.5mm,
(3) degreasing:
Temperature: 63 DEG C; Grease-removing agent specific conductivity: 12ms/cm
(4) low-temperature annealing:
4 Ge Wen districts: 760 DEG C, 800 DEG C, 800 DEG C, 780 DEG C
Speed: 3.5m/ minute
Stove internal tension: 80KN
Stove pressure: 1.5mpa
(5) straightening:
Unit elongation: 0.55%
(6) shear:
Shear by user's mould width design requirement, it is desired to surface must not have wipes defects such as drawing wound, roll marks.
(7) punching press etching sample is cut:
Etch depth: 0.15mm;
Etched width: 20mm;
Length of etch: 100mm;
Longitudinal direction, laterally each one, before and after etching, planeness changes, and within 0.1mm, reaches customer requirement.
Detected result: yield strength reaches 470MPa; Plate type is straight, surface good; The distortion modification caused without unrelieved stress after the present embodiment product is cut into little bar.
The above, it it is only the better embodiment of the present invention, not the technical scope of the present invention is imposed any restrictions, therefore every any trickle amendment, equivalent variations and modification above embodiment done according to the technical spirit of the present invention, all still belong in the scope of technical solution of the present invention.
Claims (3)
1. the rolling of a mobile phone stainless steel and the method for low temperature destressing, it is characterised in that: include following step:
(1) cold rolling 2B: get band steel, and band steel is carried out cold rolling so that it is formed with mist face on the surface of band steel;
(2) rolling: band steel is carried out multi-pass rolling, roll speed is 80-100 m/min, and before and after in the operation of rolling, Tension Difference controls at 10-30kN; And use the working roll of diameter 85mm;
(3) degreasing: the band steel after rolling is carried out skimming treatment;
(4) low-temperature annealing: the band steel after skimming treatment is carried out low-temperature annealing process, the annealed sheet temperature of low-temperature annealing is 1000-1020 DEG C, and annealing T V value is 140; Wherein T is belt steel thickness, and V is band steel annealing speed;
(5) straightening: the band steel after low-temperature annealing is carried out straightening process;
(6) shear;
(7) punching press is cut, etching sample.
2. the rolling of a kind of mobile phone stainless steel according to claim 1 and the method for low temperature destressing, it is characterised in that: described band steel is SUS304TA1/2H and H304TA3/4H。
3. the rolling of a kind of mobile phone stainless steel according to claim 1 and the method for low temperature destressing, it is characterised in that: in described step (5), the unit elongation of straightening is 0.55%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610036105.1A CN105665467A (en) | 2016-01-20 | 2016-01-20 | Method for rolling and low-temperature destressing of stainless steel for mobile phone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610036105.1A CN105665467A (en) | 2016-01-20 | 2016-01-20 | Method for rolling and low-temperature destressing of stainless steel for mobile phone |
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| CN105665467A true CN105665467A (en) | 2016-06-15 |
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| CN201610036105.1A Pending CN105665467A (en) | 2016-01-20 | 2016-01-20 | Method for rolling and low-temperature destressing of stainless steel for mobile phone |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106319193A (en) * | 2016-09-30 | 2017-01-11 | 永鑫精密材料（无锡）有限公司 | Low-temperature distressing thermal treatment process for precise cold-rolled extremely-thin stainless steel strip |
| CN109175892A (en) * | 2018-08-24 | 2019-01-11 | 江阴康瑞成型技术科技有限公司 | The coating of the mobile phone card slot of the production technology and preparation of SIM mobile phone card slot |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10330974A (en) * | 1997-05-28 | 1998-12-15 | Sumitomo Metal Ind Ltd | Production of stainless steel strip for clad material |
| CN101869911A (en) * | 2010-06-24 | 2010-10-27 | 永鑫精密材料（无锡）有限公司 | Productive technology of precise stainless steel strip used for high-end mobile phone |
| CN102699019A (en) * | 2012-04-24 | 2012-10-03 | 永鑫精密材料（无锡）有限公司 | Partially-etched precision stainless steel strip used in communication industry as well as production process and application thereof |
| CN103667653A (en) * | 2013-11-30 | 2014-03-26 | 小龙精密科技无锡有限公司 | Method for producing precision stainless steel band specially used for mobile phone |
| CN103866103A (en) * | 2014-03-24 | 2014-06-18 | 无锡宝顺不锈钢有限公司 | Production method of stainless steel band for 3G mobile phone battery case |
-
2016
- 2016-01-20 CN CN201610036105.1A patent/CN105665467A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10330974A (en) * | 1997-05-28 | 1998-12-15 | Sumitomo Metal Ind Ltd | Production of stainless steel strip for clad material |
| CN101869911A (en) * | 2010-06-24 | 2010-10-27 | 永鑫精密材料（无锡）有限公司 | Productive technology of precise stainless steel strip used for high-end mobile phone |
| CN102699019A (en) * | 2012-04-24 | 2012-10-03 | 永鑫精密材料（无锡）有限公司 | Partially-etched precision stainless steel strip used in communication industry as well as production process and application thereof |
| CN103667653A (en) * | 2013-11-30 | 2014-03-26 | 小龙精密科技无锡有限公司 | Method for producing precision stainless steel band specially used for mobile phone |
| CN103866103A (en) * | 2014-03-24 | 2014-06-18 | 无锡宝顺不锈钢有限公司 | Production method of stainless steel band for 3G mobile phone battery case |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106319193A (en) * | 2016-09-30 | 2017-01-11 | 永鑫精密材料（无锡）有限公司 | Low-temperature distressing thermal treatment process for precise cold-rolled extremely-thin stainless steel strip |
| CN106319193B (en) * | 2016-09-30 | 2018-07-06 | 永鑫精密材料（无锡）有限公司 | The very thin stainless steel band low temperature destressing heat treatment technique of precision cold-rolled |
| CN109175892A (en) * | 2018-08-24 | 2019-01-11 | 江阴康瑞成型技术科技有限公司 | The coating of the mobile phone card slot of the production technology and preparation of SIM mobile phone card slot |
| CN109175892B (en) * | 2018-08-24 | 2020-06-05 | 江阴康瑞成型技术科技有限公司 | Production process of SIM mobile phone card slot and prepared mobile phone card slot coating |
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Application publication date: 20160615 |