CN102994918B - Production method of 5754-H32 aluminum alloy plate strip - Google Patents
Production method of 5754-H32 aluminum alloy plate strip Download PDFInfo
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- CN102994918B CN102994918B CN201210581522.6A CN201210581522A CN102994918B CN 102994918 B CN102994918 B CN 102994918B CN 201210581522 A CN201210581522 A CN 201210581522A CN 102994918 B CN102994918 B CN 102994918B
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Abstract
The invention discloses a production method of a 5754-H32 aluminum alloy plate strip. The production method of the 5754-H32 aluminum alloy plate strip mainly comprises the following steps of: casting, saw cutting, face milling, heating, hot rolling, cold rolling, stabilizing annealing and fine adjusting. During the hot rolling step, hot rolled coil thickness is reserved to be 20%-35% of end product thickness, hot fine rolling final rolling temperature is 320 DEG C-350 DEG C, during the cold rolling step, end product thickness is achieved through one time of secondary cold rolling, and total working rate is 20-35%. For products with an end product thickness >=1.3mm, steps of removing hot rolling blanks to perform complete annealing and middle annealing process can be omitted, accordingly production process is shortened, and production cost is lowered.
Description
Technical field
The present invention relates to aluminium alloy and manufacture field, particularly relate to a kind of production method of 5754-H24 aluminum alloy sheets and strips.
Background technology
5754 aluminium alloys are typical alloys in Al-Mg system alloy, have medium tenacity, good solidity to corrosion and weldability, easily the feature such as to shape.5754 aluminum alloy plate materials of different heat treatment state are widely used in the fields such as welding structural element, large roof slab, automobile industry, track traffic and shipping industry, and wherein H32 state Strip is one of maximum as-heat-treated condition of consumption.
The Properties Control scope of 5754-H32 and 5754-H22 is as follows:
| Control criterion | Rm/MPa | Rp 0.2/MPa | A/% |
| EN485-2:2008 | 220～270 | ≥130 | ≥10 |
At present, the conventional flowsheet of 5754-H32 is: founding → sawing → milling face → heating → hot rolling → cold rolling → process annealing → cold rolling → stabilizing annealing → finishing → packaging.For slab (thickness >=4.0mm), following technical process can be adopted: founding → sawing → milling face → heating → hot rolling → Full Annealing → cold rolling → stabilizing annealing → finishing → packaging.Thin material technical process is complicated, and the production cycle is long, and for guaranteeing band structure and properties, before process annealing, cold rolling general working rate should be greater than 75%, and cause hot rolling blank thicker, cold rolling pass is many, and lumber recovery is low, and cost is high.For the product of finished product thickness >=4.0mm, because hot rolling finishing temperature can not effectively control more than recrystallization temperature, Full Annealing need be carried out to hot rolling blank.
Complicated for solving Production Flow Chart, the problem that cost is high can adopt H22 to replace H32 operational path, and technical process is: founding → sawing → milling face → heating → hot rolling → (Full Annealing) → cold rolling → finished products → finishing → packaging.
5754 aluminium alloys performance when recrystallize starts to anneal between temperature and recrystallize finishing temperature is extremely responsive to temperature variation, annealing temperature interval is narrow, be only about 5 DEG C, and the nuance that different coiled material is produced because of composition, front operation causes temperature range different, affect greatly to industrial production in enormous quantities, require high to annealing furnace temperature measurement accuracy and temperature homogeneity, performance inconsistency lattice phenomenon after normal appearance annealing, causes yield rate low.
In addition, if hot rolling finishing temperature can not ensure more than perfect recrystallization temperature, the annealing temperature realizing performance also can be caused different, thus can not and furnace annealing.For addressing this problem, need to carry out Full Annealing after hot rolling, homogeneous to ensure hot rolling blank performance, add production cost.
Summary of the invention
Based on this, the object of this invention is to provide a kind of production method of 5754-H32 aluminum alloy sheets and strips short route.
Concrete technical scheme is as follows:
A production method for 5754-H32 aluminum alloy sheets and strips, mainly comprises the steps: founding, sawing, milling face, heating, hot rolling, cold rolling, stabilizing annealing, finishing;
In described hot-rolled step, hot rolled coil thickness reserves 20%-35% according to finished product thickness, hot finishing finishing temperature 320-350 DEG C;
In described cold rolling step, be cold-rolled to finished product thickness through 1 passage, general working rate 20%-35%.
Wherein in some embodiments, in described heating steps, ingot casting Heating temperature is 480-520 DEG C, and soaking time is 2-5 hour.
Wherein in some embodiments, in described stabilizing annealing step, temperature range 140-200 DEG C, soaking time 1-5 hour.
Wherein in some embodiments, after described founding, the mass percent of the chemical composition of ingot casting is: Si≤0.3%, Fe0.10 ~ 0.40%, Mn0.10 ~ 0.40%, Mg2.8 ~ 3.3%, Cr0.10 ~ 0.30%, Zn≤0.2%, Ti0.01 ~ 0.03%, other impurity element be single≤and 0.03%, other impurity element adds up to≤0.10%, all the other are Al; Wherein smelting temperature is 730-750 DEG C, refining temperature 720-740 DEG C, casting temp 670-700 DEG C.
Another object of the present invention is to provide the 5754-H32 aluminum alloy sheets and strips that aforementioned production method prepares.
Concrete technical scheme is as follows:
The 5754-H32 aluminum alloy sheets and strips that a kind of aforementioned production method prepares.
Principle of the present invention is: 5754-H32 Strip be to Full Annealing state Strip carry out certain working modulus cold rolling after carry out stabilizing annealing again and process, as obtained the good Full Annealing state thin stock material of surface quality by hot continuous rolling, then can carry out to hot continuous rolling blank that less working modulus is cold rolling carries out stabilizing annealing again, thus simplify Production Flow Chart.
The present invention, for the product of finished product thickness >=1.3mm, can save and carry out Full Annealing and process annealing operation to hot rolling blank, shortens Production Flow Chart, reduces production cost.Compared with prior art, there is following beneficial effect:
(1) be 2.0 ~ 8.0mm because hot continuous rolling can roll thickness, and finishing temperature is 320-350 DEG C, more than 5754 alloy recrystallization temperature, can realize batching self-annealing, the product of finished product thickness >=1.3mm is saved to the operation of hot rolling blank being carried out to Full Annealing and process annealing, shorten the production cycle, reduce production cost.
(2) cold rolling general working rate is 20-35%, and 1 passage is rolled to finished product thickness, compares with common process, can improve cold rolling production efficiency more than 3 times, and reduce process residue.
(3) finished product Annealing Temperature scope is 140-200 DEG C, and the annealing temperature interval meeting mechanical property requirements is comparatively large, and require to reduce to annealing furnace temperature measurement accuracy and temperature uniformity, stable performance after annealing, qualification rate is high.
Embodiment
Below by way of specific embodiment, the present invention is further elaborated.
Embodiment 1
The present embodiment 5754-H32 aluminum alloy sheets and strips short-flow production method comprises following Production Flow Chart: founding → sawing → milling face → heating → hot rolling → cold rolling → stabilizing annealing → finishing → packaging.
(1) founding: after founding, the chemical composition mass percent of ingot casting is (wt%):
| Al | Si | Fe | Cu | Mn |
| 96.2611 | 0.0976 | 0.2516 | 0.0028 | 0.2405 |
| Mg | Ti | Cr | Zn | Ni |
| 2.9369 | 0.0211 | 0.1669 | 0.0181 | 0.0034 |
Smelting temperature is 730-745 DEG C, refining temperature 725 ~ 735 DEG C, casting temp 685 ~ 700 DEG C.
(2) heat: after ingot casting is heated to 490 DEG C, be incubated 4 hours.
(3) hot rolling: adopt hot continuous rolling to produce, hot roughing last pass temperature 440 DEG C, hot finishing finishing temperature 335 DEG C, hot rolling blank thickness 3.1mm.
(4) cold rolling: to be cold-rolled to 2.48mm through 1 passage, general working rate 20%.
(5) stabilizing annealing: temperature range 140 ~ 200 DEG C, soaking time 1 ~ 5 hour.
Performance after annealing:
Be 140-200 DEG C from the known finished products temperature range of upper table result, the annealing temperature interval meeting mechanical property requirements is comparatively large, and require to reduce to annealing furnace temperature measurement accuracy and temperature uniformity, stable performance after annealing, qualification rate is high.
Embodiment 2:
The production method of the present embodiment 5754-H32 aluminum alloy sheets and strips comprises following Production Flow Chart: founding → sawing → milling face → heating → hot rolling → cold rolling → stabilizing annealing → finishing.
(1) founding: after founding, the chemical composition mass percent of ingot casting is:
| Al | S i | Fe | Cu | Mn |
| 96.0423 | 0.0531 | 0.1753 | 0.0025 | 0.3025 |
| Mg | Ti | Cr | Zn | Ni |
| 3.2031 | 0.0179 | 0.1834 | 0.0176 | 0.0023 |
Smelting temperature 730-750 DEG C, refining temperature 720 ~ 730 DEG C, casting temp 690 ~ 700 DEG C.
(2) heat: after ingot casting is heated to 505 DEG C, be incubated 3 hours.
(3) hot rolling: adopt hot continuous rolling to produce, hot roughing last pass temperature 435 DEG C, hot finishing finishing temperature 323 DEG C, hot rolling blank thickness 2.7mm.
(4) cold rolling: to be cold-rolled to 2.0mm through 1 passage, general working rate 26%.
(5) stabilizing annealing: temperature range 140 ~ 200 DEG C, soaking time 1 ~ 5 hour.
Performance after annealing:
Be 140-200 DEG C from the known finished products temperature range of upper table result, the annealing temperature interval meeting mechanical property requirements is comparatively large, and require to reduce to annealing furnace temperature measurement accuracy and temperature uniformity, stable performance after annealing, qualification rate is high.
Embodiment 3:
The production method of the present embodiment 5754-H32 aluminum alloy sheets and strips comprises following Production Flow Chart: founding → sawing → milling face → heating → hot rolling → cold rolling → stabilizing annealing → finishing.
(1) founding: after founding, the chemical composition mass percent of ingot casting is (wt%):
| Al | S i | Fe | Cu | Mn |
| 96.0492 | 0.0591 | 0.2762 | 0.0035 | 0.2792 |
| Mg | Ti | Cr | Zn | Ni |
| 3.1496 | 0.0212 | 0.1463 | 0.0128 | 0.0029 |
Smelting temperature 730-745 DEG C, refining temperature 725 ~ 740 DEG C, casting temp 690 ~ 700 DEG C.
(2) heat: after ingot casting is heated to 515 DEG C, be incubated 3 hours.
(3) hot rolling: adopt hot continuous rolling to produce, hot roughing last pass temperature 443 DEG C, hot finishing finishing temperature 345 DEG C, hot rolling blank thickness 2.3mm.
(4) cold rolling: to be cold-rolled to 1.50mm through 1 passage, general working rate 35%.
(5) stabilizing annealing: temperature range 140 ~ 200 DEG C, soaking time 1 ~ 5 hour.
Performance after annealing:
Be 140-200 DEG C from the known finished products temperature range of upper table result, the annealing temperature interval meeting mechanical property requirements is comparatively large, and require to reduce to annealing furnace temperature measurement accuracy and temperature uniformity, stable performance after annealing, qualification rate is high.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (2)
1. a production method for 5754-H32 aluminum alloy sheets and strips, is characterized in that, step is: founding, sawing, milling face, heating, hot rolling, cold rolling, stabilizing annealing, finishing;
After described founding, the mass percent of the chemical composition of ingot casting is: Si≤0.3%, Fe0.10 ~ 0.40%, Mn0.10 ~ 0.40%, Mg2.8 ~ 3.3%, Cr0.10 ~ 0.30%, Zn≤0.2%, Ti0.01 ~ 0.03%, other impurity element be single≤and 0.03%, other impurity element adds up to≤0.10%, all the other are Al; Wherein smelting temperature is 730-750 DEG C, refining temperature 720-740 DEG C, casting temp 670-700 DEG C;
In described heating steps, ingot casting Heating temperature is 480-520 DEG C, and soaking time is 2-5 hour;
In described hot-rolled step, hot rolled coil thickness reserves 20%-35% according to finished product thickness, hot finishing finishing temperature 320-350 DEG C;
In described cold rolling step, be cold-rolled to finished product thickness through 1 passage, general working rate 20-35%;
In described stabilizing annealing step, temperature range 140-200 DEG C, soaking time 1-5 hour.
2. the 5754-H32 aluminum alloy sheets and strips for preparing of production method as claimed in claim 1.
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| CN103757505B (en) * | 2014-01-21 | 2016-02-24 | 亚洲铝业（中国）有限公司 | Standing-seam roofing tile aldural colour coated plate band and production method thereof |
| CN104190777B (en) * | 2014-09-26 | 2016-06-29 | 中南大学 | A kind of once-forming method of the integral panel of aluminium alloy without ageing strengthening based on autoclave |
| CN104988441B (en) * | 2015-07-28 | 2016-10-05 | 大力神铝业股份有限公司 | A kind of manufacture method eliminating 5754 aluminium alloy plate surface luders bands |
| CN108130461A (en) * | 2017-12-22 | 2018-06-08 | 中铝西南铝冷连轧板带有限公司 | A kind of coachbuilt body column plaque 5754 aluminum alloy base materials and its production method |
| CN108118216A (en) * | 2017-12-22 | 2018-06-05 | 中铝西南铝冷连轧板带有限公司 | A kind of vacuum pump on automobile power assisted braking system housing 5754 aluminum alloy base materials and its production method |
| CN109355604B (en) * | 2018-11-27 | 2021-07-09 | 广西柳州银海铝业股份有限公司 | Preparation method of 5083H321 aluminum alloy thick plate |
| CN112718856A (en) * | 2020-12-14 | 2021-04-30 | 东北轻合金有限责任公司 | Manufacturing method for improving punching Luders belt on surface of 5-series aluminum alloy strip |
| CN115533368A (en) * | 2022-09-27 | 2022-12-30 | 江苏常铝铝业集团股份有限公司 | Method for manufacturing brazing flux-free brazing multi-layer aluminum alloy plate strip for tunnel furnace brazing |
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| CN1995423A (en) * | 2006-12-30 | 2007-07-11 | 云南铝业股份有限公司 | Production method of 5754 aluminum alloy blank using cast rolling machine |
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Effective date of registration: 20160325 Address after: 528000 Guangdong Province Nanhai District of Foshan city Guicheng street lamp Lake Road No. 20 building 6 poly Watertown 33 shop of 33C Patentee after: GUANGDONG ALUHOUSE TECHNOLOGY CO., LTD. Address before: 526238 hi tech Industrial Development Zone, Guangdong, Zhaoqing Patentee before: Asia Aluminum (China) Co., Ltd. |