CN102836872A - Production method for cold-rolled steel strip used for outdoor furniture - Google Patents
Production method for cold-rolled steel strip used for outdoor furniture Download PDFInfo
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- CN102836872A CN102836872A CN2012103521887A CN201210352188A CN102836872A CN 102836872 A CN102836872 A CN 102836872A CN 2012103521887 A CN2012103521887 A CN 2012103521887A CN 201210352188 A CN201210352188 A CN 201210352188A CN 102836872 A CN102836872 A CN 102836872A
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Abstract
The invention discloses a production method for a cold-rolled steel strip used for outdoor furniture, which is characterized by comprising the following steps of: 1) carrying out desulfuration, steelmaking, LF (Ladle furnace) refining and continuous casting, and forming a casting blank; 2) rolling by a steekle mill, wherein the hot-rolling and final-rolling temperature is 850-890DEG C, and the reeling temperature is 630-670DEG C; 3) pickling by a push-pull type hydrochloric acid pickling machine in six-section pickling and five-grade counter current cascade rinsing; 4) carrying out cold rolling by a six-roll HC reversible mill, wherein the total reduction rate of cold rolling is 72.5-79.7%; 5) annealing by a total-hydrogen light cover-type annealing furnace; 6) carrying out cold rolling by a six-roll HC reversible mill, wherein the total reduction rate of cold rolling is 9-13.8%; and 7) putting a re-reeling set into storage after trimming and oiling. Compared with the common cold-rolled steel strip production technology, the production method for the cold-rolled steel strip used for the outdoor furniture, which is disclosed by the invention, has the characteristics that the technical process is simplified due to the fact that a working procedure of flattening is omitted, a great quantity of resource can be saved, the processing cost is effectively lowered, and the cost performance is high.
Description
Technical field
The present invention relates to the production method of a kind of outdoor furniture with cold-rolled strip, specifically a kind of outdoor furniture is with the production method of high rigidity high-ductility cold-rolled strip.
Background technology
Outdoor furniture mainly refers to be used for the furniture of the usefulness of outdoor confession public character activity.It is the material base of decision outdoor buildings space function and the important element of performance exterior space form.As the base material of outdoor furniture, outdoor furniture can be widely used in industries such as outdoor seat, garden table, Picnic table, wayside pavilion, awning, outdoor furniture group, outdoor umbrella, hammock, swing with cold-rolled strip, has vast market prospect.
Along with popularizing with the raising and the domestic city process of people's living standard of China's fashion idea accelerated; The public character leisure field that is the main body with sightseeing, amusement and recreation is the numerous and confused startup of each big brown stone district and villa cluster project in one's power, and outdoor furniture and articles for use are produced tight demand.The light-weighted progress of outdoor furniture will be used a large amount of glass hard steels, to improve stock utilization, reduce the outdoor furniture production cost.
For satisfying the outdoor furniture lightweight; Require to make outdoor furniture and use the base material thickness attenuate, have high thickness and precision, but in order to satisfy the safe in utilization and demand of outdoor furniture; Require steel plate to have high rigidity and good plasticity; If but adopt the cold rolling hard steel band, though, be unfavorable for the bending and the modeling requirement of material because strong working hardening effect can be satisfied the high rigidity requirement.
Produce outdoor furniture at present and adopt two kinds of production technologies with high rigidity high-ductility cold-rolled strip, a kind of is to adopt continuous annealing process, reaches the method that improves hardness through high cooling velocity; The problem that exists is that the production difficulty is big, is prone to cause broken belt, and the annealing temperature height causes energy consumption high; Cooling fast at high temperature; Internal stress big (warpage takes place easily), plate shape is poor, influences shearing, itemize and moulding.Another kind is to adopt low cooling velocity, reaches the purpose that improves hardness but need to add more valuable alloy, causes production cost height and welding performance poor.
Summary of the invention
The present invention seeks to above deficiency, provide a kind of perhydro light bell type annealing furnace that adopts to produce the production method of outdoor furniture, improve product hardness and plasticity with high rigidity high-ductility cold-rolled strip.
For reaching above purpose, the technical scheme that the present invention taked is to be accomplished by following step:
1) molten iron forms strand through desulfurization, converter smelting, the refining of LF stove, continuous casting;
2) adopt steekle mill rolling, hot rolling finishing temperature: (850～890) ℃, coiling temperature: (630～670) ℃;
3) adopt the plug-type chlorohydric acid pickling unit pickling of six sections pickling and the rinsing of Pyatyi adverse current tandem, No. 6 acid tank concentration of hydrochloric acid: (180～240) g/l, temperature: (60～70) ℃; No. 5 acid tank hydrochloric acid temperature: (65～75) ℃, No. 4 acid tank hydrochloric acid temperature: (70～80) ℃, No. 3 acid tank hydrochloric acid temperature: (70～80) ℃; No. 2 acid tank hydrochloric acid temperature: (75～85) ℃; No. 1 acid tank hydrochloric acid temperature: (80～90) ℃, concentration: (100～120) g/l, Fe
2+Content≤120g/l, No. 5 rinsing section washings temperature: (75～90) ℃, chloride ion content≤30mg/l;
4) six roller HC reversable mills are cold rolling, and cold rolling total reduction ratio is: (72.5～79.7) %;
5) perhydro light bell-type annealing furnace annealing;
6) six roller HC reversable mills are cold rolling, and cold rolling total reduction ratio is: (9～13.8) %;
7) packing warehouse-in after rewinding unit side cut, the oiling.
The strand chemical composition is by weight percentage in the step 1): C: Si≤0.12%: Mn≤0.30% :≤0.50%, P≤0.035%, S≤0.035%, and all the other are iron and unavoidable impurities; Yield strength>=195MPa, tensile strength: (315～430) MPa, percentage elongation>=33%, thickness: (3.3～3.6) mm.
Adopt the intermediate annealing of double step annealing process in the step 5); Insulation platform at (450～470) ℃ setting (2～4) h; In (630～650) ℃ (8～14) h insulation platform is set, shower water is chilled to (340～360) ℃ in the stove, air-cooledly ℃ comes out of the stove to (80～90).
Double step annealing process intermediate annealing in the step 5) is warming up to 350 ℃, and heating rate is controlled at (35～40) ℃/h, and temperature rise period hydrogen purge flow is (30～40) m
3/ h.
The outdoor furniture of explained hereafter of the present invention has the following advantages with high rigidity high-ductility cold-rolled strip:
1, the outdoor furniture produced of the present invention is used cold-rolled strip, compares with conventional cold-rolled strip, has hardness height, characteristics that plasticity is high.Compare with conventional cold-rolled strip production technology, owing to without smooth operation, simplified technological process, can save ample resources, effectively cut down finished cost, cost performance is high.
2, the outdoor furniture of the present invention's production can be used for industries such as outdoor seat, garden table, Picnic table, wayside pavilion, awning, outdoor furniture group, outdoor umbrella, hammock, swing with cold-rolled strip, has vast market prospect.
The specific embodiment
Below in conjunction with embodiment the present invention is described further.
Embodiment 1
Specification is that (0.9 * 1250) mm, the trade mark are that Q195 high rigidity high-ductility cold-rolled strip production stage is:
(1) Smelting: hot metal desulphurization
? smelting
LF refining
casting.
(2) hot rolling: with chemical composition is C: Si≤0.12%: Mn≤0.30% :≤0.50%, P≤0.035%, S≤0.035%; All the other continuous casting billets for iron and unavoidable impurities carry out hot rolling at steekle mill; Finishing temperature is (870～890) ℃; Coiling temperature is (650～670) ℃, and rolling thickness is 3.6mm.
(3) the plug-type chlorohydric acid pickling unit pickling of six sections pickling of employing and the rinsing of Pyatyi adverse current tandem, No. 6 acid tank concentration of hydrochloric acid: 240g/l, temperature: 60 ℃; No. 5 acid tank hydrochloric acid temperature: 75 ℃, No. 4 acid tank hydrochloric acid temperature: 80 ℃, No. 3 acid tank hydrochloric acid temperature: 80 ℃; No. 2 acid tank hydrochloric acid temperature: 85 ℃; No. 1 acid tank hydrochloric acid temperature: 90 ℃, concentration: 100g/l, Fe
2+Content: 109g/l.No. 5 rinsing section washings temperature: 75 ℃, chloride ion content: 27mg/l.
(4) six roller HC reversable mill once cold rolling, controlling cold rolling total reduction ratio is 72.5%, product thickness is 0.99mm.
(5) adopt the intermediate annealing of double step annealing process at perhydro light bell type annealing furnace, be warming up to 350 ℃ of heating rates and be controlled at 40 ℃/h, temperature rise period hydrogen purge flow is 30m
3/ h is provided with 2h insulation platform at 450 ℃, at 650 ℃ 8h insulation platform is set, and shower water is chilled to 360 ℃ in the stove, air-cooledly comes out of the stove to 90 ℃.
(6) six roller HC reversable mill secondary cold-rollings, controlling cold rolling reduction ratio is 9%, product thickness is 0.90mm.
(7) cold rolling coil of strip afterwards packing warehouse-in after the side cut of rewinding unit, oiling.
Adopt the product of above-mentioned explained hereafter, its key technical indexes can reach:
(1) dimensional discrepancy: thickness deviation: (0.03～0) mm; Width difference: (0～-3) mm;
(2) plate shape is smooth, flatness defects such as boundless wave, middle wave, rib wave, complex seas;
(3) hardness (HRB): 75～81, elongation after fracture＞30%, 180 ° clod wash flawless.
(4) any surface finish, defectives such as no blackspot, carbonization spot, scratch, bonding.
Embodiment 2
Specification is that (0.7 * 1250) mm, the trade mark are that Q195 high rigidity high-ductility cold-rolled strip production stage is:
(1) Smelting: hot metal desulphurization?
? smelting
LF refining
casting.
[0024](2) hot rolling: with chemical composition is C: Si≤0.12%: Mn≤0.30% :≤0.50%, P≤0.035%, S≤0.035%; All the other continuous casting billets for iron and unavoidable impurities carry out hot rolling at steekle mill; Finishing temperature is (860～880) ℃; Coiling temperature is (640～660) ℃, and rolling thickness is 3.3mm.
(3) the plug-type chlorohydric acid pickling unit pickling of six sections pickling of employing and the rinsing of Pyatyi adverse current tandem, No. 6 acid tank concentration of hydrochloric acid: 203g/l, temperature: 67 ℃; No. 5 acid tank hydrochloric acid temperature: 69 ℃, No. 4 acid tank hydrochloric acid temperature: 76 ℃, No. 3 acid tank hydrochloric acid temperature: 73 ℃; No. 2 acid tank hydrochloric acid temperature: 82 ℃; No. 1 acid tank hydrochloric acid temperature: 86 ℃, concentration: 112g/l, Fe
2+Content: 116g/l.No. 5 rinsing section washings temperature: 84 ℃, chloride ion content: 24mg/l.
(4) six roller HC reversable mill once cold rolling, controlling cold rolling total reduction ratio is 76.9%, product thickness is 0.76mm.
(5) adopt the intermediate annealing of double step annealing process at perhydro light bell type annealing furnace, be warming up to 350 ℃ of heating rates and be controlled at 38 ℃/h, temperature rise period hydrogen purge flow is 36m
3/ h is provided with 4h insulation platform at 460 ℃, at 640 ℃ 10h insulation platform is set, and shower water is chilled to 350 ℃ in the stove, air-cooledly comes out of the stove to 85 ℃.
(6) six roller HC reversable mill secondary cold-rollings, controlling cold rolling reduction ratio is 13.8%, product thickness is 0.655mm.
(7) cold rolling coil of strip afterwards packing warehouse-in after the side cut of rewinding unit, oiling.
Adopt the product of above-mentioned explained hereafter, its key technical indexes can reach:
(1) dimensional discrepancy: thickness deviation: (0.03～0) mm; Width difference: (0～-3) mm;
(2) plate shape is smooth, flatness defects such as boundless wave, middle wave, rib wave, complex seas;
(3) hardness (HRB): 79～84, elongation after fracture＞28%, 180 ° clod wash flawless.
(4) any surface finish, defectives such as no blackspot, carbonization spot, scratch, bonding.
Embodiment 3
Specification is that (0.6 * 1250) mm, the trade mark are that Q195 high rigidity high-ductility cold-rolled strip production stage is:
(1) Smelting: hot metal desulphurization?
? smelting
LF refining
casting.
[0033](2) hot rolling: with chemical composition is C: Si≤0.12%: Mn≤0.30% :≤0.50%, P≤0.035%, S≤0.035%; All the other continuous casting billets for iron and unavoidable impurities carry out hot rolling at steekle mill; Finishing temperature is (850～870) ℃; Coiling temperature is (630～650) ℃, and rolling thickness is 3.3mm.
(3) the plug-type chlorohydric acid pickling unit pickling of six sections pickling of employing and the rinsing of Pyatyi adverse current tandem, No. 6 acid tank concentration of hydrochloric acid: 180g/l, temperature: 70 ℃; No. 5 acid tank hydrochloric acid temperature: 65 ℃, No. 4 acid tank hydrochloric acid temperature: 70 ℃, No. 3 acid tank hydrochloric acid temperature: 70 ℃; No. 2 acid tank hydrochloric acid temperature: 75 ℃; No. 1 acid tank hydrochloric acid temperature: 80 ℃, concentration: 120g/l, Fe
2+Content: 120g/l.No. 5 rinsing section washings temperature: 84 ℃, chloride ion content: 24mg/l.
(4) six roller HC reversable mill once cold rolling, controlling cold rolling total reduction ratio is 79.7%, product thickness is 0.67mm.
(5) adopt the intermediate annealing of double step annealing process at perhydro light bell type annealing furnace, be warming up to 350 ℃ of heating rates and be controlled at 35 ℃/h, temperature rise period hydrogen purge flow is 40m
3/ h is provided with 4h insulation platform at 470 ℃, at 630 ℃ 14h insulation platform is set, and shower water is chilled to 340 ℃ in the stove, air-cooledly comes out of the stove to 80 ℃.
(6) six roller HC reversable mill secondary cold-rollings, controlling cold rolling reduction ratio is 12.2%, product thickness is 0.588mm.
(7) cold rolling coil of strip afterwards packing warehouse-in after the side cut of rewinding unit, oiling.
Adopt the product of above-mentioned explained hereafter, its key technical indexes can reach:
(1) dimensional discrepancy: thickness deviation: (0.02～0) mm; Width difference: (0～-2) mm;
(2) plate shape is smooth, flatness defects such as boundless wave, middle wave, rib wave, complex seas;
(3) hardness (HRB): 82～85, elongation after fracture＞26%, 180 ° clod wash flawless.
(4) any surface finish, defectives such as no blackspot, carbonization spot, scratch, bonding.
Claims (4)
1. an outdoor furniture is used the cold-rolled strip production method, it is characterized in that being accomplished by following step:
1) molten iron forms strand through desulfurization, converter smelting, the refining of LF stove, continuous casting;
2) adopt steekle mill rolling, hot rolling finishing temperature: (850～890) ℃, coiling temperature: (630～670) ℃;
3) adopt the plug-type chlorohydric acid pickling unit pickling of six sections pickling and the rinsing of Pyatyi adverse current tandem, No. 6 acid tank concentration of hydrochloric acid: (180～240) g/l, temperature: (60～70) ℃; No. 5 acid tank hydrochloric acid temperature: (65～75) ℃, No. 4 acid tank hydrochloric acid temperature: (70～80) ℃, No. 3 acid tank hydrochloric acid temperature: (70～80) ℃; No. 2 acid tank hydrochloric acid temperature: (75～85) ℃; No. 1 acid tank hydrochloric acid temperature: (80～90) ℃, concentration: (100～120) g/l, Fe
2+Content≤120g/l, No. 5 rinsing section washings temperature: (75～90) ℃, chloride ion content≤30mg/l;
4) six roller HC reversable mills are cold rolling, and cold rolling total reduction ratio is: (72.5～79.7) %;
5) perhydro light bell-type annealing furnace annealing;
6) six roller HC reversable mills are cold rolling, and cold rolling total reduction ratio is: (9～13.8) %;
7) packing warehouse-in after rewinding unit side cut, the oiling.
2. a kind of outdoor furniture according to claim 1 is used the cold-rolled strip production method; The strand chemical composition is by weight percentage in the step 1): C: Si≤0.12%: Mn≤0.30% :≤0.50%, P≤0.035%, S≤0.035%, and all the other are iron and unavoidable impurities; Yield strength>=195MPa, tensile strength: (315～430) MPa, percentage elongation>=33%, thickness: (3.3～3.6) mm.
3. a kind of outdoor furniture according to claim 1 is used the cold-rolled strip production method; Adopt the intermediate annealing of double step annealing process in the step 5); Insulation platform at (450～470) ℃ setting (2～4) h; In (630～650) ℃ (8～14) h insulation platform is set, shower water is chilled to (340～360) ℃ in the stove, air-cooledly ℃ comes out of the stove to (80～90).
4. a kind of outdoor furniture according to claim 1 is used the cold-rolled strip production method, and double step annealing process intermediate annealing in the step 5) is warming up to 350 ℃, and heating rate is controlled at (35～40) ℃/h, and temperature rise period hydrogen purge flow is (30～40) m
3/ h.
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| CN2012103521887A CN102836872A (en) | 2012-09-21 | 2012-09-21 | Production method for cold-rolled steel strip used for outdoor furniture |
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| CN2012103521887A CN102836872A (en) | 2012-09-21 | 2012-09-21 | Production method for cold-rolled steel strip used for outdoor furniture |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104060068A (en) * | 2013-06-14 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Cold-rolled steel plate and preparation method thereof |
| CN107119175A (en) * | 2017-07-04 | 2017-09-01 | 合肥市大卓电力有限责任公司 | A kind of annealing process of low-carbon cold rolling steel plate |
| CN111549281A (en) * | 2020-05-23 | 2020-08-18 | 山东泰山轧钢有限公司 | Cold-rolled steel strip for high-hardness hardware and production method thereof |
| CN111974802A (en) * | 2020-07-23 | 2020-11-24 | 柳州钢铁股份有限公司 | Cold continuous rolling ultra-low roughness high strength steel light panel and cover type annealing production method thereof |
| CN112795845A (en) * | 2020-12-31 | 2021-05-14 | 江苏沙钢集团有限公司 | Semi-hard steel coil and preparation method thereof |
| CN114632827A (en) * | 2022-03-17 | 2022-06-17 | 唐山瑞丰钢铁（集团）有限公司 | Method for producing packing belt |
| CN114737196A (en) * | 2021-01-07 | 2022-07-12 | 江苏创泰特钢制品有限公司 | Production method of softened steel strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104060068A (en) * | 2013-06-14 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Cold-rolled steel plate and preparation method thereof |
| CN107119175A (en) * | 2017-07-04 | 2017-09-01 | 合肥市大卓电力有限责任公司 | A kind of annealing process of low-carbon cold rolling steel plate |
| CN111549281A (en) * | 2020-05-23 | 2020-08-18 | 山东泰山轧钢有限公司 | Cold-rolled steel strip for high-hardness hardware and production method thereof |
| CN111974802A (en) * | 2020-07-23 | 2020-11-24 | 柳州钢铁股份有限公司 | Cold continuous rolling ultra-low roughness high strength steel light panel and cover type annealing production method thereof |
| CN114632825A (en) * | 2020-07-23 | 2022-06-17 | 柳州钢铁股份有限公司 | Cold continuous rolling ultra-low roughness high strength steel smooth panel cover type annealing production method |
| CN114632825B (en) * | 2020-07-23 | 2024-02-02 | 柳州钢铁股份有限公司 | Cover type annealing production method for cold continuous rolling ultra-low roughness high strength steel optical panel |
| CN112795845A (en) * | 2020-12-31 | 2021-05-14 | 江苏沙钢集团有限公司 | Semi-hard steel coil and preparation method thereof |
| CN112795845B (en) * | 2020-12-31 | 2022-06-03 | 江苏沙钢集团有限公司 | Semi-hard steel coil and preparation method thereof |
| CN114737196A (en) * | 2021-01-07 | 2022-07-12 | 江苏创泰特钢制品有限公司 | Production method of softened steel strip |
| CN114632827A (en) * | 2022-03-17 | 2022-06-17 | 唐山瑞丰钢铁（集团）有限公司 | Method for producing packing belt |
| CN114632827B (en) * | 2022-03-17 | 2024-05-03 | 唐山瑞丰钢铁（集团）有限公司 | Production method of packing belt |
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Application publication date: 20121226 |