CN1962922A - Heat treatment method for use in processing technology for production of 5XXX series aluminium plate by using cast-rolling stock - Google Patents

Heat treatment method for use in processing technology for production of 5XXX series aluminium plate by using cast-rolling stock Download PDF

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Publication number
CN1962922A
CN1962922A CN 200610048882 CN200610048882A CN1962922A CN 1962922 A CN1962922 A CN 1962922A CN 200610048882 CN200610048882 CN 200610048882 CN 200610048882 A CN200610048882 A CN 200610048882A CN 1962922 A CN1962922 A CN 1962922A
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China
Prior art keywords
rolling
annealing
cast
cooled
blank
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CN 200610048882
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CN100445414C (en
Inventor
杨钢
李全
胥福顺
肖明富
姜伟
李永平
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Yunnan Metallurgical Group Co Ltd
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Yunnan Metallurgical Group Co Ltd
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Priority to CNB2006100488824A priority Critical patent/CN100445414C/en
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Publication of CN100445414C publication Critical patent/CN100445414C/en
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Abstract

The invention discloses a heat disposing method of 5XXX series of aluminium board through casting blank in the heat disposal technical domain, which comprises the following steps: rolling the blank for three times in the middle annealing course; heating to 350-500 Deg C rapidly; insulating 8-15h; cooling to 200-260 Deg C; winding out of furnace; annealing; proceeding cold rolling for black; heating to 150-200 Deg C rapidly; insulating 3-6h; heating to 200-300 Deg C; insulating 5-8h; cooling to 140-180 Deg C to do cold rolling out of furnace directly.

Description

With the heat treating method in the cast-rolling stock production 5XXX series of aluminium board complete processing
Technical field
The invention belongs to the heat treatment technics field.More specifically to a kind of heat treating method of producing 5XXX series alloy aluminium sheet complete processing with cast-rolling stock.
Background technology
It is alloy that the 5XXX series alloy belongs to magnalium, and this alloy has higher intensity, good solidity to corrosion, weldability and good plastic property.In the aluminium sheet processing industry, along with the increase of alloying element content, the intensity of aluminium sheet increases, and resistance to deformation increases, and difficulty of processing is big.The production technology of 5XXX series alloy aluminium sheet mainly is the hot rolling method, hot rolling blank is that aluminium liquid is cast big slab ingot, the general thick 600mm of ingot casting size, wide 2200mm, long 4000~8000mm mills face through large-scale milling machine, removes the oxide compound and the impurity of big flat bloom surface, heat then, be rolled above under the condition of " recrystallize " temperature.Because the volume of hot rolling ingot is bigger, in aximal deformation value plastic history subsequently, interior tissue has experienced repeatedly answer, recrystallize, make blank at the homogenizing of interior tissue, the aspects such as size and shape, point defect and L﹠S line defect change in concentration of crystal grain, all obtain to improve greatly, so the hot rolling technology has, and deflection is big, blank is organized fine and closely woven, the advantage of good product quality, but the hot rolling line investment cost is big, the construction period is long, the production cost height, and energy consumption and pollution are big.
Casting and rolling process is to allow aluminium liquid be directed to by a covering device in " roll gap " that forms between two rolls, behind the crystallisation by cooling by force and distortion by two rolls, obtains the casting volume.In the continuous casting and rolling process, be subjected to the rapid cooling of two rolls in the narrower roll gap of aluminium liquid between two rolls and crystallization, blank after solidifying is subjected to two rolls rolling deformation to a certain degree simultaneously, and the interior tissue of resulting casting plate belongs to half as-cast structure, the crystalline directivity is stronger.Casting and roll process is produced the high alloy plate the technological difficulties of himself, and casting alloy slab is all having inborn deficiency with hot rolling slab aspect interior tissue, surface segregation and the strip shape quality.
Cause difficulty of processing big and adopt cast-rolling stock to produce 5XXX series alloy aluminium sheet because of green strength height, plasticity difference, also openly report so far.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of and can be used for the heat treatment technics that cast-rolling stock is produced 5XXX series of aluminium board technology, thereby improve 5XXX series alloy aluminium sheet blank tissue morphology, improve 5XXX series alloy aluminium sheet overall quality, and technology is simple, energy consumption and tooling cost are low, pollute and lack the efficient height.
Technical scheme of the present invention comprises process annealing and finished products, and its step is specific as follows:
1, process annealing: adopt cold-rolling equipment to the cast-rolling stock of 5.5-7.5mm carry out three times rolling, sotck thinkness after rolling is 2.0--3.5mm, then cold rolling blank is rolled into annealing furnace, is rapidly heated to 350-500 ℃, be incubated 8-15 hour, it is air-cooled to come out of the stove when being cooled to 200-260 ℃;
2, finished products: adopt cold-rolling equipment that the cold rolling blank after process annealing is handled is rolled processing, sotck thinkness after rolling is 0.2--0.9mm, then cold rolling blank is rolled into annealing furnace, be rapidly heated to 150-200 ℃, be incubated 3-6 hour, furnace temperature is risen to 200-300 ℃ again, be incubated 5-8 hour, it is air-cooled directly to come out of the stove when being cooled to 140-180 ℃.
The invention has the beneficial effects as follows: process annealing is meant the part recrystallization annealing process that carries out through the slab after the cold rolling gross distortion, when process annealing except that recrystallize takes place, also may have phase transformation reaction, this phase transformation reaction will influence the inherence tissue and the performance of blank undoubtedly.Therefore, the formulation of intermediate annealing process not only will be considered recrystallization process, also will consider the phase transformation in the annealing region.To eliminate the work hardening and the internal stress of blank, make blank plasticity be able to abundant recovery.The purpose of finished products is interior tissue and the mechanical property that satisfies customer requirements in order to make final sheet alloy organize perfect recrystallization, to make sheet alloy obtain having.
Embodiment
Embodiment 1: produce heat treating method in the 5005 alloy aluminum board machining process with cast-rolling stock
1, process annealing
Adopt cold-rolling equipment to the 5005 alloy cast-rolling stocks of 5.5mm carry out three times rolling, the sotck thinkness after rolling is 2.0mm, then cold rolling blank is rolled into annealing furnace, is rapidly heated to 350 ℃, is incubated 8 hours, it is air-cooled to come out of the stove when being cooled to 200 ℃.
2, finished products
Adopt cold-rolling equipment that the cold rolling blank after process annealing is handled is rolled processing, sotck thinkness after rolling is 0.2mm, then cold rolling blank is rolled into annealing furnace, be rapidly heated to 150 ℃, be incubated 3 hours, furnace temperature is risen to 200 ℃ again, be incubated 5 hours, it is air-cooled directly to come out of the stove when being cooled to 140 ℃.
The tensile strength of the 0.2mm 5005 alloy aluminium sheets after above-mentioned thermal treatment is 315MPa, and yield strength is 285MPa, and elongation is 10%.
Embodiment 2: produce heat treating method in the 5754 alloy aluminum board machining process with cast-rolling stock
1, process annealing
Adopt cold-rolling equipment to the 5754 alloy cast-rolling stocks of 7.5mm carry out three times rolling, the sotck thinkness after rolling is 3.5mm, then cold rolling blank is rolled into annealing furnace, is rapidly heated to 500 ℃, is incubated 15 hours, it is air-cooled to come out of the stove when being cooled to 260 ℃.
2, finished products
Adopt cold-rolling equipment that the cold rolling blank after process annealing is handled is rolled processing, sotck thinkness after rolling is 0.9mm, then cold rolling blank is rolled into annealing furnace, be rapidly heated to 200 ℃, be incubated 6 hours, furnace temperature is risen to 300 ℃ again, be incubated 8 hours, it is air-cooled directly to come out of the stove when being cooled to 180 ℃.
The tensile strength of the 0.9mm 5754 alloy aluminium sheets after above-mentioned thermal treatment is 355MPa, and yield strength is 325MPa, and elongation is 15%.
Embodiment 3: produce heat treating method in the 5086 alloy aluminum board machining process with cast-rolling stock
1, process annealing
Adopt cold-rolling equipment to the 5086 alloy cast-rolling stocks of 7.0mm carry out three times rolling, the sotck thinkness after rolling is 3.0mm, then cold rolling blank is rolled into annealing furnace, is rapidly heated to 440 ℃, is incubated 12 hours, it is air-cooled to come out of the stove when being cooled to 240 ℃.
2, finished products
Adopt cold-rolling equipment that the cold rolling blank after process annealing is handled is rolled processing, sotck thinkness after rolling is 0.7mm, then cold rolling blank is rolled into annealing furnace, be rapidly heated to 190 ℃, be incubated 5 hours, furnace temperature is risen to 270 ℃ again, be incubated 7 hours, it is air-cooled directly to come out of the stove when being cooled to 170 ℃.
The tensile strength of the 0.7mm 5086 alloy aluminium sheets after above-mentioned thermal treatment is 325MPa, and yield strength is 300MPa, and elongation is 11%.
Embodiment 4: produce heat treating method in the 5456 alloy aluminum board machining process with cast-rolling stock
1, process annealing
Adopt cold-rolling equipment to the 5456 alloy cast-rolling stocks of 6.0mm carry out three times rolling, the sotck thinkness after rolling is 2.5mm, then cold rolling blank is rolled into annealing furnace, is rapidly heated to 400 ℃, is incubated 10 hours, it is air-cooled to come out of the stove when being cooled to 220 ℃.
2, finished products
Adopt cold-rolling equipment that the cold rolling blank after process annealing is handled is rolled processing, sotck thinkness after rolling is 0.5mm, then cold rolling blank is rolled into annealing furnace, be rapidly heated to 170 ℃, be incubated 4 hours, furnace temperature is risen to 230 ℃ again, be incubated 6 hours, it is air-cooled directly to come out of the stove when being cooled to 150 ℃.
The tensile strength of the 0.6mm 5456 alloy aluminium sheets after above-mentioned thermal treatment is 345MPa, and yield strength is 310MPa, and elongation is 12%.
Embodiment 5: produce heat treating method in the 5182 alloy aluminum board machining process with cast-rolling stock
1, process annealing
Adopt cold-rolling equipment to the 5182 alloy cast-rolling stocks of 7.1mm carry out three times rolling, the sotck thinkness after rolling is 3.3mm, then cold rolling blank is rolled into annealing furnace, is rapidly heated to 480 ℃, is incubated 13 hours, it is air-cooled to come out of the stove when being cooled to 250 ℃.
2, finished products
Adopt cold-rolling equipment that the cold rolling blank after process annealing is handled is rolled processing, sotck thinkness after rolling is 0.8mm, then cold rolling blank is rolled into annealing furnace, be rapidly heated to 190 ℃, be incubated 4.5 hours, furnace temperature is risen to 290 ℃ again, be incubated 6.5 hours, it is air-cooled directly to come out of the stove when being cooled to 170 ℃.
The tensile strength of the 0.8mm 5182 alloy aluminium sheets after above-mentioned thermal treatment is 340MPa, and yield strength is 295MPa, and elongation is 12%.
Embodiment 6: produce heat treating method in the 5083 alloy aluminum board machining process with cast-rolling stock
1, process annealing
Adopt cold-rolling equipment to the 5083 alloy cast-rolling stocks of 6.8mm carry out three times rolling, the sotck thinkness after rolling is 3.1mm, then cold rolling blank is rolled into annealing furnace, is rapidly heated to 450 ℃, is incubated 11 hours, it is air-cooled to come out of the stove when being cooled to 230 ℃.
3, finished products
Adopt cold-rolling equipment that the cold rolling blank after process annealing is handled is rolled processing, sotck thinkness after rolling is 0.8mm, then cold rolling blank is rolled into annealing furnace, be rapidly heated to 180 ℃, be incubated 3.5 hours, furnace temperature is risen to 260 ℃ again, be incubated 7.5 hours, it is air-cooled directly to come out of the stove when being cooled to 160 ℃.
The tensile strength of the 0.8mm 5083 alloy aluminium sheets after above-mentioned thermal treatment is 335MPa, and yield strength is 315MPa, and elongation is 13%.
Utilize prior art and the technology of the present invention respectively 5 series alloy aluminium sheets of cast-rolling stock production to be heat-treated its result such as following table:
Project Rolling situation Rolling minimal thickness mm Tensile strength (MPa) Elongation (%)
There is not any thermal treatment 1.5mm raw edges is serious during following thickness, broken belt is frequent 1.1 390 Break
Process annealing Comparatively smooth when rolling 0.5 305 2.5
Process annealing and finished products Very smooth when rolling 0.5 345 12
As can be seen from the above table, the present invention has easy to operate, can effectively improve the interior tissue of 5 series alloy aluminium sheets, improves the advantages such as over-all properties of 5 series alloy aluminium sheet finished products.

Claims (1)

1, a kind of with the heat treating method in the cast-rolling stock production 5XXX series of aluminium board complete processing, the steps include:
(1) process annealing: adopt cold-rolling equipment to the cast-rolling stock of 5.5-7.5mm carry out three times rolling, sotck thinkness after rolling is 2.0--3.5mm, then cold rolling blank is rolled into annealing furnace, is rapidly heated to 350-500 ℃, be incubated 8-15 hour, it is air-cooled to come out of the stove when being cooled to 200-260 ℃;
(2) finished products: adopt cold-rolling equipment that the cold rolling blank after process annealing is handled is rolled processing, sotck thinkness after rolling is 0.2--0.9mm, then cold rolling blank is rolled into annealing furnace, be rapidly heated to 150-200 ℃, be incubated 3-6 hour, furnace temperature is risen to 200-300 ℃ again, be incubated 5-8 hour, it is air-cooled directly to come out of the stove when being cooled to 140-180 ℃.
CNB2006100488824A 2006-12-06 2006-12-06 Heat treatment method for use in processing technology for production of 5XXX series aluminium plate by using cast-rolling stock Expired - Fee Related CN100445414C (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104357771A (en) * 2014-12-09 2015-02-18 郑州大学 Cold rolling thermal treatment process for improving bending property of aluminum magnesium alloy
TWI576440B (en) * 2016-04-19 2017-04-01 中國鋼鐵股份有限公司 Method for manufacturing aluminum can materials
CN106834825A (en) * 2016-11-16 2017-06-13 广西南南铝加工有限公司 5182 aluminium alloys and the aluminium alloy are prepared into the process of cover material strip material
CN112195425A (en) * 2020-08-31 2021-01-08 新疆众和股份有限公司 Processing technology of 5050 aluminum alloy

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87102994A (en) * 1987-04-25 1988-11-09 中国原子能科学研究院 Process for producing ribbons of hard aluminium alloy for deep stamping processing
JP2844411B2 (en) * 1993-07-12 1999-01-06 スカイアルミニウム株式会社 Aluminum alloy sheet for superplastic forming capable of cold preforming and method for producing the same
US5681405A (en) * 1995-03-09 1997-10-28 Golden Aluminum Company Method for making an improved aluminum alloy sheet product
EP0799900A1 (en) * 1996-04-04 1997-10-08 Hoogovens Aluminium Walzprodukte GmbH High strength aluminium-magnesium alloy material for large welded structures
FR2813316B1 (en) * 2000-08-29 2002-10-18 Pechiney Rhenalu PROCESS FOR PRODUCING VERY THIN STRIPS OF ALUMINUM-IRON ALLOY
JP2006037148A (en) * 2004-07-26 2006-02-09 Furukawa Sky Kk Aluminum alloy hard sheet for can barrel and its production method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104357771A (en) * 2014-12-09 2015-02-18 郑州大学 Cold rolling thermal treatment process for improving bending property of aluminum magnesium alloy
CN104357771B (en) * 2014-12-09 2017-02-22 郑州大学 Cold rolling thermal treatment process for improving bending property of aluminum magnesium alloy
TWI576440B (en) * 2016-04-19 2017-04-01 中國鋼鐵股份有限公司 Method for manufacturing aluminum can materials
CN106834825A (en) * 2016-11-16 2017-06-13 广西南南铝加工有限公司 5182 aluminium alloys and the aluminium alloy are prepared into the process of cover material strip material
CN112195425A (en) * 2020-08-31 2021-01-08 新疆众和股份有限公司 Processing technology of 5050 aluminum alloy
CN112195425B (en) * 2020-08-31 2022-02-18 新疆众和股份有限公司 Processing technology of 5050 aluminum alloy

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