CN106319193B - The very thin stainless steel band low temperature destressing heat treatment technique of precision cold-rolled - Google Patents
The very thin stainless steel band low temperature destressing heat treatment technique of precision cold-rolled Download PDFInfo
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- CN106319193B CN106319193B CN201610879741.0A CN201610879741A CN106319193B CN 106319193 B CN106319193 B CN 106319193B CN 201610879741 A CN201610879741 A CN 201610879741A CN 106319193 B CN106319193 B CN 106319193B
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- steel band
- low temperature
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Classifications
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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
- 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
-
- 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
-
- 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
- C21D1/30—Stress-relieving
Abstract
The invention discloses the very thin stainless steel band low temperature destressing heat treatment techniques of precision cold-rolled, include the following steps：1) finish rolling finished steel coils are selected：1.0~1.5mm of glacing flatness of selected coil of strip；2) stretch-bending straightening is handled：Permanent extension mode stretch-bending straightening steel band is carried out to selected coil of strip, most at last its flatness control in 0.30~0.50mm；3) Low Temperature Heat Treatment：Low temperature destressing heat treatment will be carried out by the steel band of stretch-bending straightening processing, 400~780 DEG C of heat treatment temperature uses protective gas in low temperature heat treatment；4) low-tension bundling.The above-mentioned very thin stainless steel band low temperature destressing heat treatment technique of precision cold-rolled generates the process technology scheme of internal stress using Low Temperature Heat Treatment removal steel band rolling and follow-up stretch-bending straightening, realizes that the very thin stainless steel band of precision cold-rolled is unlikely to deform after being formed for part punchings such as plate/backboards in tablet computer, keyboard backboard, smart mobile phone through chemical attack.
Description
Technical field
The invention belongs to stainless steel belt destressing treatment technology, more particularly, to a kind of very thin stainless steel band of precision cold-rolled
Low temperature destressing heat treatment technique.
Background technology
At present, precise stainless steel strip is largely rolled using multi-roll mill such as ten four-rollers, mill, and continuous bright moves back
Stove is heat-treated, and is improved steel band glacing flatness technique productions steel band using stretch bending-straightening machine, can not be met superelevation glacing flatness and punching press
It is still necessary to chemical attacks after part is formed to change the problem of accessory appearance is yielding, scrappage is high.
Invention content
The purpose of the present invention is to provide a kind of very thin stainless steel band low temperature destressing heat treatment technique of precision cold-rolled, with solution
After certainly precision cold-rolled stainless steel band punching parts are formed in the prior art through chemical attack it is yielding the problem of.
For this purpose, the present invention uses following technical scheme：
The very thin stainless steel band low temperature destressing heat treatment technique of precision cold-rolled, includes the following steps：
1) finish rolling finished steel coils are selected：1.0~1.5mm of glacing flatness of selected coil of strip；
2) stretch-bending straightening is handled：Stretch-bending straightening processing improves plate shape, that is, improves glacing flatness precision, to the finish rolling that has selected into
Product coil of strip carries out permanent extension mode stretch-bending straightening steel band, most at last its flatness control in 0.30~0.50mm；
3) Low Temperature Heat Treatment：Low temperature destressing heat treatment, heat treatment temperature will be carried out by the steel band of stretch-bending straightening processing
400~780 DEG C, stainless steel band not oxidized table in Low Temperature Heat Treatment destressing is avoided using protective gas in heat treatment process
Face changes colour；
4) low-tension bundling：0.1~0.5Kg/mm of low-tension is taken to the steel band Jing Guo low temperature destressing heat treatment2List
The small tension receiving coil of plane product carries out bundling.
Particularly, the pole that the finish rolling finished steel coils in the step 1) are produced using the calendering of Sendzimir Sendzimir mill
Thin precision cold-rolled finished product stainless steel band volume, the trade mark are SUS 304, chemical composition：Carbon (C) 0.05%, silicon (Si) 0.42%, manganese
(Mn) 1.3%, phosphorus (P) 0.045%, sulphur (S) 0.025%, nickel (Ni) 8.02%, chromium (Cr) 18.3%, copper (Cu) 0.13%, nitrogen
(N) 0.028%, molybdenum (Mo) 0.01%.
Particularly, the The concrete specification of coil of strip is selected by the step 1)：0.15~0.40mm of thickness, width 300~
400mm, surface be 2D surfaces, roughness Ra=0.25~0.35um, hardness HV310~340, tensile strength >=930mpa, bend
Take intensity >=665mpa, elongation >=3%.
Particularly, stretch-bending straightening processing carries out permanent extension mode stretch bending using 23 roller Tension levelling lines in the step 2)
Steel band is aligned, for elongation control 0.40~0.65%, " S " roller identical tension is adjusted to 550~800N/mm2；Opening degree is set as 2.0
~3.5mm.
Particularly, secondary stretch-bending straightening process program is taken in stretch-bending straightening processing in the step 2), for the first time using big
Extension, hightension；Second using small extension, small tension receiving coil.
Particularly, in the step 3) 10~25N/mm of hightension is taken in the stove of Low Temperature Heat Treatment2So that steel band is low
Prolong genesis analysis while internal stress is eliminated under warm environment, eliminate transversely deforming.
Particularly, 3~18m/ of Low Temperature Heat Treatment speed points in the step 3), 600~900 revs/min of wind speed is cooled down.
Beneficial effects of the present invention are that the very thin stainless steel band low temperature destressing of the precision cold-rolled is hot compared with prior art
Treatment process generates the process technology scheme of internal stress using Low Temperature Heat Treatment removal steel band rolling and follow-up stretch-bending straightening, realizes
The very thin stainless steel band of precision cold-rolled passes through after being formed for part punchings such as plate/backboards in tablet computer, keyboard backboard, smart mobile phone
Chemical attack is unlikely to deform, not only simple process and low cost；And it ensure that the quality for the product processed using the steel band.
Description of the drawings
Fig. 1 is the process flow chart of the very thin stainless steel band low temperature destressing heat treatment technique of precision cold-rolled of the present invention.
Specific embodiment
Technical solution to further illustrate the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment one：
Refering to Figure 1, in the present embodiment, a kind of very thin stainless steel band low temperature destressing heat treatment work of precision cold-rolled
Skill, specific treatment process steps are：
1) finish rolling finished steel coils are selected：The selected coil of strip trade mark be SUS304, chemical composition：Carbon (C) 0.05%, silicon (Si)
0.42%, manganese (Mn) 1.3%, phosphorus (P) 0.045%, sulphur (S) 0.025%, nickel (Ni) 8.02%, chromium (Cr) 18.3%, copper (Cu)
0.13%, nitrogen (N) 0.028%, molybdenum (Mo) 0.01%, the finished product precision cold-rolled by Sendzimir mill finish rolling is stainless
Steel coil strip, thickness 0.15mm, width 308mm, surface 2D surfaces, 0.25~0.35um of roughness Ra, glacing flatness 1.0~
1.5mm, mechanical performance are tensile strength sigma b >=930Mpa, yield strength 0.2 >=665Mpa of σ, elongation σ 5 >=3%, hardness
HV310~340；
2) stretch-bending straightening is handled：To through the rolling thickness 0.15mm of mill essence, width 308mm, glacing flatness
In the finish rolling product volume of 1.0~1.5mm, improve and improve into andante shape, that is, glacing flatness using 23 roller stretch bending-straightening machines.Using perseverance
Stretch-bending straightening is handled extension mode in two times.It uses for the first time and extends to 0.50~0.60% elongation percentage greatly, hightension 550~
600N/mm2, for the second time 0.4~0.45% elongation percentage, 450~500N/mm of small tension receiving coil are extended to using small2Tension, opening degree tune
For 2.2~2.5mm.Then it is that 0.30~0.50mm is put down in 5I-10I by steel band Strip Shape Control by automatic strip shape control system
Straight degree.
3) Low Temperature Heat Treatment：Prolong by pressure-sizing and stretch-bending straightening, glacing flatness have obtained improving the steel band improved i.e. so that steel
It is basically identical that band prolongs the length that cross direction profiles are longitudinally extended, if but certainly existing internal stress and not taking special technology
It is eliminated, follow-up stamping, chemical attack will will appear uneven straight phenomenon, be not used to stringent to flatness requirements
Industry field.Therefore take low temperature heat-treatment process, it is rolled and stretch-bending straightening during generate stress carry out low temperature
Accelerate ageing treatment, its internal stress is eliminated so as to reach.Low Temperature Heat Treatment temperature is set as 550 DEG C~750 DEG C, stove internal tension tune
For 10~12N/mm2, thermal treatment rate 15~18m/ minutes, 600~700 revs/min of wind speed of cooling, and take 75%Hz+
25%Hz protective gas carries out when Low Temperature Heat Treatment goes de-stress stainless steel band the protection steel strip surface light that ensures that treated
It is bright without discoloration non-oxidation, must the protection of entire volume lining paper in order to avoid dampening steel strip surface during winding.
4) low-tension bundling：2~3 times of respective width is generally according to the requirement monovolume amount of client and carries out bundling, packaging.
In order to avoid Low Temperature Heat Treatment eliminates rolling, the steel band of internal stress existing for stretch-bending straightening will not be generated because of rewinding bundling
New stress and influence plate shape, using 0.10~0.15Kg/mm of low-tension2Carry out bundling, inspection, packaging, delivery client.
Using above-mentioned process technology scheme, treated that product the key technical indexes is as follows, thickness deviation：0.15±
0.005mm, width difference：152 negative common difference 0.10mm, hardness：HV330 ± 2, tensile strength：σ b=935 ± 5Mpa, surrender are strong
Degree：σ 0.2=670 ± 5Mpa, elongation：σ 5=20%, surface roughness：Ra=0.25~0.30um, glacing flatness≤0.3mm,
It is indeformable after punching press, chemical attack forming.
Embodiment two：
Refering to Figure 1, in the present embodiment, a kind of very thin stainless steel band low temperature destressing heat treatment work of precision cold-rolled
Skill, specific treatment process steps are：
1) finish rolling finished steel coils are selected：Selecting the trade mark, chemical composition is the same as embodiment one for SUS304.By Sendzimir two
The finished product precision cold-rolled stainless steel band volume of ten roller mill finish rolling.Its thickness 0.20mm, width 336mm, surface 2D surfaces, roughness
Ra0.25~0.35um, 0.8~1.0mm of glacing flatness, mechanical performance tensile strength sigma b >=930Mpa, yield strength σ 0.2 >=
665Mpa, elongation σ 5 >=3%, hardness HV310~340.
2) stretch-bending straightening is handled：To the rolling thickness 0.20mm of mill essence, width 336mm, straight
The finish rolling product volume of 1.0~1.5mm is spent, is improved using 23 roller stretch bending-straightening machines into andante shape, that is, glacing flatness.Using perseverance
Stretch-bending straightening is handled extension mode in two times.It uses for the first time and extends to 0.55~0.60% elongation percentage greatly, hightension 580~
650N/mm2, for the second time 0.42~0.48% elongation percentage, 480~550N/mm of small tension receiving coil are extended to using small2Tension, opening degree tune
For 2.5~3.0mm.Then it is that 0.30~0.50mm is put down in 5I-10I by steel band Strip Shape Control by automatic strip shape control system
Straight degree.
3) Low Temperature Heat Treatment：Prolong by pressure-sizing and stretch-bending straightening, glacing flatness have obtained improving the steel band improved i.e. so that steel
It is basically identical that band prolongs the length that cross direction profiles are longitudinally extended, if but certainly existing internal stress and not taking special technology
It is eliminated, follow-up stamping, chemical attack will will appear uneven straight phenomenon, be not used to stringent to flatness requirements
Industry field.Therefore take low temperature heat-treatment process, it is rolled and stretch-bending straightening during generate stress carry out low temperature
Accelerate ageing treatment, its internal stress is eliminated so as to reach.Low Temperature Heat Treatment temperature is set as 600 DEG C~750 DEG C, stove internal tension tune
For 15~20N/mm2, thermal treatment rate 6~8m/ minutes, 650~750 revs/min of wind speed of cooling, and take 75%Hz+
25%Hz protective gas protects stainless steel band when Low Temperature Heat Treatment goes de-stress, it is ensured that treated steel strip surface light
It is bright without discoloration non-oxidation.It avoids dampening steel strip surface necessary entire volume lining paper protection during winding.
4) low-tension bundling：Low-tension technique is taken to be controlled according to the requirement monovolume amount of client the 2~3 of its respective width
Times bundling, packaging.In order to avoid Low Temperature Heat Treatment eliminates rolling, the steel band of internal stress existing for stretch-bending straightening will not be because of
Rewinding bundling generates new stress and influences plate shape, using 0.15~0.20Kg/mm of low-tension2Carry out bundling, inspection, packaging,
Deliver goods client.
Using above-mentioned process technology scheme, treated that product the key technical indexes is as follows, thickness deviation：0.20±
0.005mm, width difference：165 negative common difference 0.10mm, hardness：HV=320 ± 2, tensile strength：σ b=935 ± 5Mpa, surrender
Intensity：σ 0.2=670 ± 5Mpa, elongation：σ 5=30%, surface roughness：Ra=0.25~0.35um, glacing flatness≤
0.3mm, it is indeformable after punching press, chemical attack forming.
Embodiment three：
Refering to Figure 1, in the present embodiment, a kind of very thin stainless steel band low temperature destressing heat treatment work of precision cold-rolled
Skill, specific treatment process steps are：
1) finish rolling finished steel coils are selected：Selecting the trade mark, chemical composition is the same as embodiment one for SUS304.By Sendzimir two
The finished product precision cold-rolled stainless steel band volume of ten roller mill finish rolling.Its thickness 0.40mm, width 336mm, surface 2D surfaces, roughness
Ra0.25~0.35um, 1.0~1.5mm of glacing flatness, mechanical performance tensile strength sigma b >=930Mpa, yield strength σ 0.2 >=
665Mpa, elongation σ 5 >=3%, hardness HV320~340.
2) stretch-bending straightening is handled：To the rolling thickness 0.40mm of mill essence, width 336mm, straight
The finish rolling product volume of 1.0~1.5mm is spent, is improved using 23 roller stretch bending-straightening machines into andante shape, that is, glacing flatness.Using perseverance
Stretch-bending straightening is handled extension mode in two times.It uses for the first time and extends to 0.60~0.65% elongation percentage greatly, hightension 650~
800N/mm2, for the second time 0.45~0.50% elongation percentage, 500~600N/mm of small tension receiving coil are extended to using small2Tension, opening degree tune
For 2.8~3.5mm.In 8I-10I it is that 0.40~0.50mm is put down by steel band Strip Shape Control by automatic plate shape instrument control system
Straight degree.
3) Low Temperature Heat Treatment：Prolong by pressure-sizing and stretch-bending straightening, glacing flatness have obtained improving the steel band improved i.e. so that steel
It is basically identical that band prolongs the length that cross direction profiles are longitudinally extended, if but certainly existing internal stress and not taking special technology
It is eliminated, follow-up stamping, chemical attack will will appear uneven straight phenomenon, be not used to stringent to flatness requirements
Industry field.Therefore take low temperature heat-treatment process, it is rolled and stretch-bending straightening during generate stress carry out low temperature
Accelerate ageing treatment, eliminate its internal stress so as to reach, Low Temperature Heat Treatment temperature is set as 650 DEG C~780 DEG C, stove internal tension tune
For 20~25N/mm2, thermal treatment rate 3~5m/ minutes, 750~850 revs/min of wind speed of cooling, and take 75%Hz+
25%Hz protective gas protects stainless steel band when Low Temperature Heat Treatment goes de-stress, it is ensured that treated steel strip surface light
It is bright without discoloration non-oxidation.Steel band is dampened during to avoid winding must the protection of entire volume lining paper.
4) low-tension bundling：Low-tension technique is taken to be controlled according to the requirement monovolume amount of client the 2~3 of its respective width
Times bundling, packaging.In order to avoid Low Temperature Heat Treatment eliminates rolling, the steel band of internal stress existing for stretch-bending straightening will not be because of
Rewinding bundling generates new stress and influences plate shape, using 0.20~0.30Kg/mm of low-tension2Carry out bundling, inspection, packaging,
Deliver goods client.
Using above-mentioned process technology scheme, treated that product the key technical indexes is as follows, thickness deviation：0.40±
0.005mm, width difference：165 negative common difference 0.10mm, hardness：HV=320 ± 2, tensile strength：σ b=935 ± 5Mpa, surrender
Intensity：σ 0.2=670 ± 5Mpa, elongation：σ 5=30%, surface roughness：Ra=0.25~0.35um, glacing flatness≤
0.5mm, it is indeformable after punching press, chemical attack forming.
Above example is to elaborate the basic principle and characteristic of the present invention, and the present invention is not limited by above-mentioned example,
Without departing from the spirit and scope, the present invention also has various changes, these changes and modifications are both fallen within
In scope of the claimed invention.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (3)
1. the very thin stainless steel band low temperature destressing heat treatment technique of precision cold-rolled, which is characterized in that it includes the following steps：
1) finish rolling finished steel coils are selected：1.0~1.5mm of glacing flatness of selected coil of strip；
The very thin precision cold-rolled that finish rolling finished steel coils in the step 1) are produced using the calendering of Sendzimir Sendzimir mill
Finished product stainless steel band roll up, the trade mark be SUS 304, chemical composition：Carbon (C) 0.05%, silicon (Si) 0.42%, manganese (Mn) 1.3%, phosphorus
(P) 0.045%, sulphur (S) 0.025%, nickel (Ni) 8.02%, chromium (Cr) 18.3%, copper (Cu) 0.13%, nitrogen (N) 0.028%,
Molybdenum (Mo) 0.01%；
The The concrete specification of coil of strip is selected by the step 1)：0.15~0.40mm of thickness, 300~400mm of width, surface are 2D tables
Face, roughness Ra=0.25~0.35um, hardness HV310~340, tensile strength >=930mpa, yield strength >=665mpa are stretched
Long rate >=3%；
2) stretch-bending straightening is handled：Stretch-bending straightening processing improves plate shape, that is, glacing flatness precision is improved, to the finish rolling finished steel selected
Volume carries out permanent extension mode stretch-bending straightening steel band, most at last its flatness control in 0.30~0.50mm；
3) Low Temperature Heat Treatment：The steel band progress low temperature destressing heat treatment that will be handled by stretch-bending straightening, heat treatment temperature 400~
780 DEG C, stainless steel band not oxidized surface in Low Temperature Heat Treatment destressing is avoided to become using protective gas in heat treatment process
Color；
10~25N/mm of hightension is taken in the step 3) in the stove of Low Temperature Heat Treatment2Cause steel band planted agent at low ambient temperatures
Power prolongs genesis analysis while elimination, eliminate transversely deforming；
3~18m/ of Low Temperature Heat Treatment speed points in the step 3), 600~900 revs/min of wind speed is cooled down；
4) low-tension bundling：0.1~0.5Kg/mm of low-tension is taken to the steel band Jing Guo low temperature destressing heat treatment2Unit plane
Long-pending small tension receiving coil carries out bundling.
2. the very thin stainless steel band low temperature destressing heat treatment technique of precision cold-rolled according to claim 1, which is characterized in that
Stretch-bending straightening processing carries out permanent extension mode stretch-bending straightening steel band, elongation percentage using 23 roller Tension levelling lines in the step 2)
0.40~0.65%, " S " roller identical tension is adjusted to 550~800N/mm for control2；Opening degree is set as 2.0~3.5mm.
3. the very thin stainless steel band low temperature destressing heat treatment technique of precision cold-rolled according to claim 1, which is characterized in that
Secondary stretch-bending straightening process program is taken in stretch-bending straightening processing in the step 2), for the first time using big extension, hightension；Second
It is secondary to use small extension, small tension receiving coil.
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| 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 |
| CN113441548B (en) * | 2021-07-01 | 2023-07-18 | 永鑫精密材料（无锡）有限公司 | Production method of short-drawn high-gloss surface precision stainless steel belt for electronic industry |
| CN114210728B (en) * | 2022-02-21 | 2022-05-17 | 山西太钢不锈钢精密带钢有限公司 | Control method for eliminating orange peel print on surface of ultra-flat and ultra-thin precise strip steel with backlight plate |
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| CN103484647A (en) * | 2013-09-11 | 2014-01-01 | 山东能源机械集团乾元不锈钢制造有限公司 | Production process of low-magnetic stainless steel band |
| CN105665467A (en) * | 2016-01-20 | 2016-06-15 | 东莞市灿煜金属制品有限公司 | Method for rolling and low-temperature destressing of stainless steel for mobile phone |
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| CN102492813A (en) * | 2012-01-04 | 2012-06-13 | 山东能源机械集团乾元不锈钢制造有限公司 | Production technology of stainless steel band for weaving reed |
| CN102489550A (en) * | 2012-01-04 | 2012-06-13 | 山东能源机械集团乾元不锈钢制造有限公司 | Production method for stainless steel belt for etching |
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Inventor after: Yuan Xuanli Inventor before: Song Xiaobo |
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Denomination of invention: Low temperature stress relief heat treatment process for precision cold rolled ultra thin stainless steel strip Effective date of registration: 20211227 Granted publication date: 20180706 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi Huishan branch Pledgor: YONGXIN PRECISION MATERIAL (WUXI) Co.,Ltd. Registration number: Y2021320010615 |