CN105925858A - Aluminum alloy sheet and production method thereof - Google Patents
Aluminum alloy sheet and production method thereof Download PDFInfo
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- CN105925858A CN105925858A CN201610411418.0A CN201610411418A CN105925858A CN 105925858 A CN105925858 A CN 105925858A CN 201610411418 A CN201610411418 A CN 201610411418A CN 105925858 A CN105925858 A CN 105925858A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
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Abstract
The invention discloses a 6016-series aluminum alloy sheet for a vehicle body and a production method thereof. The aluminum alloy sheet comprises the following chemical components in percentage by mass: 1.0-1.5% of Si, 0-0.50% of Fe, 0-0.20% of Cu, 0-0.20% of Mn, 0.25-0.60% of Mg, 0-0.10% of Cr, 0-0.10% of Zn, 0-0.10% of Ti, and the balance of Al. The production method comprises the steps of batching-smelting-converter-furnace side refining-standing-casting-sawing-surface milling-ingot homogenization-hot rolling-intermediate annealing-cold rolling-electrospark frosting-finished product cold rolling-solid solution quenching-drawing correction-Ti/Zr passivation-preageing-finished product coiling. The aluminum alloy sheet can provide a high-grade vehicle body sheet to users, improves the yield in punching, reduces the vehicle manufacturer cost, improves the formability and the baking hardness of aluminum alloy sheets, and is broad in market prospect and prominent in economic benefit.
Description
Technical field
The invention belongs to the technical field that aluminum alloy plate materials produces, particularly relate to a kind of body of a motor car 6016 line aluminium alloys
Thin plate and production method thereof.
Background technology
Energy-saving and emission-reduction, automotive light weight technology have become worldwide trend.Through the research and development of light weight material in automobile decades, people
Gradually think that 6016 (Al-Mg-Si system) alloy is the optimal aluminum alloy materials as vehicle body plate.It not only has comprehensively
Mechanical property and forming property, and be heat treatment can reinforced aluminium alloy, in baking hardening (BH) performance than other line aluminium alloys
Good.As automobile exterior panel, it must have the anti-indenture of alloy material, formability, aging stability, the bright and new property in surface and
Barbecue hardening capacity.
CN104561681A body of a motor car is raw by the one described in 6016 aluminium alloy sheets and production method patent thereof
Product method, by melting and casting, milling face, hot rolling, cold rolling, Technology for Heating Processing step, improves the HB extension of aluminum alloy plate materials
Yield strength after long rate and HB, yield rate when improving punching press, reduce automobile wide family cost, improve aluminum alloy plate materials formability and
Baking brokenization.But this sheet material can only be used as car inner plate or cheap automobile exterior panel.
Summary of the invention
The present invention is directed to shortcoming of the prior art, it is provided that a kind of body of a motor car is with 6016 line aluminium alloy thin plate and productions thereof
Method.
The present invention adopts the following technical scheme that:
A kind of aluminium alloy sheet, it is characterised in that the chemical composition of described aluminium alloy sheet and mass percent be: Si
1.0～1.1%, Fe 0.16～0.22%, Cu 0.12～0.16%, Mn 0.08～0.12%, Mg 0.45～0.45%, Cr
0～0.10%, Zn 0～0.10%, Ti 0～0.10%, surplus is Al.It is announced with ASTM B209M or GB/T3190
Nominal chemical composition is compared (such as table 1), and main component controls tightened up, comprehensively improves anti-indenture, formability, aging stability
Property, the bright and new property in surface and barbecue hardening capacity.
Table 1 nominal composition compares with chemical composition of the present invention
A kind of such as the production method of above-mentioned aluminium alloy sheet, it is characterised in that described method includes: dispensing → melting → turn
Stove → furnace side refine → standing → casting → sawing → milling face → homogenizing cast ingot → hot rolling → intermediate annealing → cold rolling →
Electric spark frosting treatment → cold rolling finished product → solution hardening → straightening (permanent set) → Ti/Zr passivation → preageing → finished product
Coiled material.
According to above-mentioned method, it is characterised in that described method includes:
(1) melting and casting: prepare raw material by the chemical composition of aluminium alloy sheet and mass percent, at 720 DEG C～
Smelting aluminium alloy raw material under conditions of 750 DEG C, when raw material of aluminum alloy 50%～60% is molten into aluminum liquid, opens electromagnetism and stirs
Mix, after raw material of aluminum alloy all melts, add component additive agent, and carry out skimming, adjusting component, transfer melt be to being incubated
Stove, carries out furnace side Ar+Cl2 gaseous mixture refine, composition qualified and casting make adequate preparation after, melt stand appropriate time, at melt
Through online treatment under the conditions of temperature 700 DEG C～710 DEG C, pour into aluminium alloy cast ingot；
(2) milling face: by step (1) aluminium alloy cast ingot cutting head cutting tail, milling face；
(3) hot rolling: the aluminium alloy cast ingot after step (2) being processed is heated to 480 DEG C～570 in step-by-step movement advances stove
DEG C, it being incubated 8～26h, then roll up at 1+5 hot continuous rolling to thickness 3.0mm aluminium alloy, finishing temperature is 330 DEG C～350 DEG C；
(4) cold rolling: aluminum alloy coiled materials step (3) obtained is at 380 DEG C～390 DEG C, after 2h asks annealing, then aluminum is closed
Gold plate is cold-rolled to 1.05mm by 3.0mm through 4 passages, then through electric spark texturing 1.0mm；
(5) heat treatment: aluminium alloy sheet step (4) obtained processes 560 DEG C～570 DEG C solid baths, total heat time heating time
Being 90～110 seconds, carry out water-cooled immediately, in 3min, temperature is down to less than 60 DEG C, then carries out straightening, permanent set: 0.5%
～1.0%, Ti/Zr passivation, Pre-aging treatment, Pre-aging treatment condition is 120 DEG C～180 DEG C, is incubated lmin～2min.
According to above-mentioned method, it is characterised in that the cleaning molten of described step (1) uses multi-stage combination cleaning molten skill
Art, it may be assumed that from the beginning of former paving material selection, mixed gas refine in smelting, melt stove, online plural serial stage SNIF degasification, double
Level ceramic filter, add a cover the kinds of processes measures such as chute preheating and drying is anti-pollution, make the gas in melt, slag inclusion get rid of, obtain
The Technology of purer melt.
According to above-mentioned production method, it is characterised in that the Ti/Zr passivating film weight in described step (5): 2.0mg/m2≤
Ti≤8.0mg/m2；Online Pre-aging treatment system is 145 DEG C/1min.
Beneficial effects of the present invention:
In production method the most of the present invention during melt melting and casting, cleaning molten uses multi-stage combination cleaning molten skill
Art, makes ingot metallurgy quality reach the level of High Purity, makes ingot metallurgy quality meet: grain size 1 grade；[H]≤0.1ml/
100gAl；Na ＜ 2PPm；Ca ＜ 4PPm；Slag ＜ 50K/kg.Forming property and the mechanical property of product are more excellent.
Production method the most of the present invention uses intermediate annealing process, the performance of batching of band can be improved, and can improve
The inhomogeneities of the hot rolling microstructure adverse effect to material surface performance, it is also possible to control micro-group after Aluminium Alloy Solution Treatment
Knit, improve forming property (horizontal plastic property strain ratio r value) to a certain extent.
Production method the most of the present invention uses EDT frosting treatment and Ti/Zr Passivation Treatment, plate surface can be made more to adsorb
Property and japanning after bright and new property.
Solution hardening and Pre-aging treatment in production method the most of the present invention, can effectively eliminate product and make to bake because of natrual ageing
The impact that paint hardening is the best.
5. the present invention be a kind of complete body of a motor car with 6016 aluminum alloy thin plate producing process, Gao Pin can be provided the user
The vehicle body thin plate of matter, yield rate when improving punching press, reduces auto vendor's cost, improves formability and the baking of aluminum alloy plate materials
Hardening, has wide market prospect and significant economic benefit.
Detailed description of the invention
The invention discloses a kind of aluminium alloy sheet, its chemical composition and mass percent be: Si 1.0～1.1%, Fe
0.16～0.22%, Cu 0.12～0.16%, Mn 0.08～0.12%, Mg 0.45～0.45%, Cr 0～0.10%, Zn
0～0.10%, Ti 0～0.10%, surplus is Al..The production method of the present invention includes: dispensing → melting → converter → furnace side
Refine → standing → casting → sawing → milling face → homogenizing cast ingot → hot rolling → intermediate annealing → cold rolling → electric spark hair
Change process → cold rolling finished product → solution hardening → straightening (permanent set) → Ti/Zr passivation → preageing → finished product coiled material.
Below in conjunction with some specific embodiments, the present invention is further described.
A kind of body of a motor car 6016 lattens, its chemical composition and percent mass such as table 1.
This alloying component measured value (wt%) of table 1
Body of a motor car one of production method of 6016 aluminum alloy thin plates that one of example 1～4 is the most described, including following
Step:
(1) melting and casting: chemical composition and mass percent by the most described aluminium alloy sheet of example 1～4 are accurate
Standby raw material, wherein, solid material accounts for 30%, and I and II waste material 45%, remaining is electrolyte.Melt under conditions of 720-760 DEG C
Aluminium metallurgy alloy raw material, when raw material of aluminum alloy 50%～60% is molten into aluminum liquid, opens electromagnetic agitation, works as raw material of aluminum alloy
All after fusing (720 DEG C), add component additive agent, and carry out skimming, adjusting component, transfer melt to holding furnace, carry out stove
Side Ar+Cl2 gaseous mixture refine (STAS), composition qualified and casting make adequate preparation after, melt stand 30min, at melt temperature 700
～process through online (SNIF degasification, CCF filter (30PPI+50PPI), crystal grain refinement) under the conditions of 710 DEG C, pour into aluminium alloy
Ingot casting.Ingot metallurgy quality meets: grain size 1 grade；[H]=0.085ml/100gAl；Na=2PPm；Ca ＜ 4PPm；Slag=
24K/kg
(2) milling face: by step (1) aluminium alloy cast ingot cutting head cutting tail, milling face.
(3) hot rolling: the aluminium alloy cast ingot after step (2) being processed is heated to 560 DEG C/24h+ in step-by-step movement advances stove,
480 DEG C/2h, then rolling up at 1+5 hot continuous rolling to thickness 3.0mm aluminium alloy, finishing temperature is 339 DEG C.
(4) cold rolling: after asking annealing by the aluminum alloy coiled materials that step (3) obtains in 380 DEG C/2h, then by aluminium alloy plate by
3.0mm is cold-rolled to 1.05mm through 4 passages, then through EDT texturing 1.0mm.
(5) heat treatment: aluminium alloy sheet step (4) obtained processes 560 DEG C of solid baths, and total heat time heating time is 96 seconds,
Carrying out water-cooled (room temperature) immediately, in 3min, temperature is down to less than 60 DEG C, then carries out straightening, permanent set: 0.6%, Ti/Zr
Passivating film weight (TZ=6.03mg/m2Every face), Pre-aging treatment 145 DEG C, it is incubated 70 seconds.
Body of a motor car the two of the production method of 6016 aluminum alloy thin plates that one of example 1～4 is the most described, including following
Step:
(1) melting and casting: chemical composition and mass percent by the most described aluminium alloy sheet of example 1～4 are accurate
Standby raw material, wherein, solid material accounts for 40%, and I and II waste material 45%, remaining is electrolyte.Melt under conditions of 720-760 DEG C
Aluminium metallurgy alloy raw material, when raw material of aluminum alloy 50%～60% is molten into aluminum liquid, opens electromagnetic agitation, works as raw material of aluminum alloy
All after fusing (720 DEG C), add component additive agent, and carry out skimming, adjusting component, transfer melt to holding furnace, carry out stove
Side Ar gas refine (STAS), after composition is qualified and casting is made adequate preparation, melt stands 30min, melt temperature 700～710 DEG C
Under the conditions of process through online (SNIF degasification, CCF filter (30PPI+50PPI), crystal grain refinement), pour into aluminium alloy cast ingot.Casting
Ingot metallurgy quality meets: grain size 1 grade；[H]=0.097ml/100gAl；Na=2PPm；Ca ＜ 4PPm；Slag=28K/kg
(2) milling face: by step (1) aluminium alloy cast ingot cutting head cutting tail, milling face.
(3) hot rolling: the aluminium alloy cast ingot after step (2) being processed is heated to 560 DEG C/8h+ in step-by-step movement advances stove,
480 DEG C/2h, then rolling up at 1+5 hot continuous rolling to thickness 3.0mm aluminium alloy, finishing temperature is 350 DEG C.
(4) cold rolling: after asking annealing by the aluminum alloy coiled materials that step (3) obtains in 380 DEG C/2h, then by aluminium alloy plate by
3.0mm is cold-rolled to 1.05mm through 4 passages, then through EDT texturing 1.0mm.
(5) heat treatment: aluminium alloy sheet step (4) obtained processes 560 DEG C of solid baths, and total heat time heating time is 90 seconds,
Carrying out water-cooled (room temperature) immediately, in 3min, temperature is down to less than 60 DEG C, then carries out straightening, permanent set: 0.8%, Ti/Zr
Passivating film weight (TZ=6.11mg/m2Every face), Pre-aging treatment 150 DEG C, it is incubated 60 seconds.
Body of a motor car the three of the production method of 6016 aluminum alloy thin plates that one of example 1～4 is the most described, including following
Step:
(1) melting and casting: chemical composition and mass percent by the most described aluminium alloy sheet of example 1～4 are accurate
Standby raw material, wherein, solid material accounts for 45%, and I and II waste material 40%, remaining is electrolyte.Melt under conditions of 720-760 DEG C
Aluminium metallurgy alloy raw material, when raw material of aluminum alloy 50%～60% is molten into aluminum liquid, opens electromagnetic agitation, works as raw material of aluminum alloy
All after fusing (720 DEG C), add component additive agent, and carry out skimming, adjusting component, transfer melt to holding furnace, carry out stove
Side (Ar95%+Cl25%) mixed gas refine (STAS), composition qualified and casting make adequate preparation after, melt stand 35min,
Process through online (SNIF degasification, CCF filter (30PPI+50PPI), crystal grain refinement) under the conditions of melt temperature 700～710 DEG C, water
Form aluminium alloy cast ingot.Ingot metallurgy quality meets: grain size 1 grade；[H]=0.0802ml/100gAl；Na=2PPm；Ca ＜
4PPm；Slag=20K/kg
(2) milling face: by step (1) aluminium alloy cast ingot cutting head cutting tail, milling face.
(3) hot rolling: the aluminium alloy cast ingot after step (2) being processed is heated to 560 DEG C/24h+ in step-by-step movement advances stove,
480 DEG C/2h, then rolling up at 1+5 hot continuous rolling to thickness 3.0mm aluminium alloy, finishing temperature is 355 DEG C.
(4) cold rolling: after asking annealing by the aluminum alloy coiled materials that step (3) obtains in 380 DEG C/2h, then by aluminium alloy plate by
3.0mm is cold-rolled to 1.05mm through 4 passages, then through EDT texturing 1.0mm.
(5) heat treatment: aluminium alloy sheet step (4) obtained processes 560 DEG C of solid baths, and total heat time heating time is 90 seconds,
Carrying out water-cooled (room temperature) immediately, in 3min, temperature is down to less than 60 DEG C, then carries out straightening, permanent set: 0.8%, Ti/Zr
Passivating film weight (TZ=6.09mg/m2Every face), Pre-aging treatment 160 DEG C, it is incubated 50 seconds.
Body of a motor car the four of the production method of 6016 aluminum alloy thin plates that one of example 1～4 is the most described, including following
Step:
(1) melting and casting: chemical composition and mass percent by the most described aluminium alloy sheet of example 1～4 are accurate
Standby raw material, wherein, solid material accounts for 45%, and I and II waste material 40%, remaining is electrolyte.Melt under conditions of 720-760 DEG C
Aluminium metallurgy alloy raw material, when raw material of aluminum alloy 50%～60% is molten into aluminum liquid, opens electromagnetic agitation, works as raw material of aluminum alloy
All after fusing (720 DEG C), add component additive agent, and carry out skimming, adjusting component, transfer melt to holding furnace, carry out stove
Side (Ar95%+Cl25%) mixed gas refine (STAS), composition qualified and casting make adequate preparation after, melt stand 35min,
Process through online (SNIF degasification, CCF filter (30PPI+50PPI), crystal grain refinement) under the conditions of melt temperature 700～710 DEG C, water
Form aluminium alloy cast ingot.Ingot metallurgy quality meets: grain size 1 grade；[H]=0.0755ml/100gAl；Na=2PPm；Ca ＜
4PPm；Slag=22K/kg
(2) milling face: by step (1) aluminium alloy cast ingot cutting head cutting tail, milling face.
(3) hot rolling: the aluminium alloy cast ingot after step (2) being processed is heated to 560 DEG C/24h+ in step-by-step movement advances stove,
480 DEG C/2h, then rolling up at 1+5 hot continuous rolling to thickness 3.0mm aluminium alloy, finishing temperature is 346 DEG C.
(4) cold rolling: aluminum alloy coiled materials step (3) obtained is cold-rolled to 1.05mm by 3.0mm through 4 passages, then through EDT hair
Change 1.0mm.
(5) heat treatment: aluminium alloy sheet step (4) obtained processes 560 DEG C of solid baths, and total heat time heating time is 90 seconds,
Carrying out water-cooled (room temperature) immediately, in 3min, temperature is down to less than 60 DEG C, then carries out straightening (permanent set: 0.8%), Ti/
Zr passivating film weight (TZ=6.15mg/m2Every face), Pre-aging treatment 150 DEG C, it is incubated 60 seconds.
Body of a motor car described in example 1～4 production method one of arbitrarily of 6016 aluminum alloy thin plates produces on thin plate
Take horizontal sample, at room temperature, by the mechanical property (T4P) of user's requirement detection aluminium alloy sheet.Its result is as shown in table 2.Can
See, increase solid and feed intake, can obviously reduce slag content；Use intermediate annealing, horizontal plastic property strain ratio r value can be increased.
Body of a motor car described in example 1～4 production method one of arbitrarily of 6016 aluminum alloy thin plates produces on thin plate
Take horizontal sample, at room temperature place 60 days, by the mechanical property of user's requirement detection aluminium alloy sheet.Its result is as shown in table 3.
Visible, stability is preferable.
Body of a motor car described in example 1～4 production method one of arbitrarily of 6016 aluminum alloy thin plates produces thin plate,
Ambient temperatare takes horizontal sample after putting 60 days from thin plate, through 2% permanent deformation, then 185 DEG C of insulation 20min heat treatments；By user
Require the mechanical property of detection aluminium alloy sheet (T64).Its result is as shown in table 4.
Table 2 is at room temperature placed 7 days, the mechanics properties testing result of aluminium alloy sheet (T4P)
Table 3 is at room temperature placed 60 days, the mechanics properties testing result of latten (T4P)
Table 4 is at room temperature placed 60 days, the mechanics properties testing result of latten (T64)
。
Claims (5)
1. an aluminium alloy sheet, it is characterised in that the chemical composition of described aluminium alloy sheet and mass percent be: Si 1.0
～1.5%, Fe 0～0.50%, Cu 0～0.20%, Mn 0～0.20%, Mg 0.25～0.60%, Cr 0～0.10%,
Zn 0～0.10%, Ti 0～0.10%, surplus is Al.
2. the production method of an aluminium alloy sheet as claimed in claim 1, it is characterised in that described method includes: dispensing
→ melting → converter → furnace side refine → standing → casting → sawing → milling face → homogenizing cast ingot → hot rolling → centre is moved back
Fire → cold rolling → electric spark frosting treatment → cold rolling finished product → solution hardening → straightening → Ti/Zr passivation → preageing → finished product volume
Material.
Method the most according to claim 2, it is characterised in that described method includes:
(1) melting and casting: chemical composition and mass percent by aluminium alloy sheet prepare raw material, at 720 DEG C～750 DEG C
Under conditions of smelting aluminium alloy raw material, when raw material of aluminum alloy 50%～60% is molten into aluminum liquid, open electromagnetic agitation, work as aluminum
After alloy raw material all melts, add component additive agent, and carry out skimming, adjusting component, transfer melt to holding furnace, carry out
Furnace side Ar+Cl2 gaseous mixture refine, composition qualified and casting make adequate preparation after, melt stand appropriate time, at melt temperature 700
DEG C～710 DEG C under the conditions of through online treatment, pour into aluminium alloy cast ingot；
(2) milling face: by step (1) aluminium alloy cast ingot cutting head cutting tail, milling face；
(3) hot rolling: the aluminium alloy cast ingot after step (2) being processed is heated to 480 DEG C～570 DEG C in step-by-step movement advances stove, protects
Temperature 8～26h, then rolls up at 1+5 hot continuous rolling to thickness 3.0mm aluminium alloy, and finishing temperature is 330 DEG C～350 DEG C；
(4) cold rolling: aluminum alloy coiled materials step (3) obtained is at 380 DEG C～390 DEG C, after asking annealing in 2h, then by aluminium alloy plate
It is cold-rolled to 1.05mm through 4 passages by 3.0mm, then through electric spark texturing 1.0mm；
(5) heat treatment: aluminium alloy sheet step (4) obtained processes 560 DEG C～570 DEG C solid baths, temperature retention time be 90～
110 seconds, carrying out water-cooled immediately, in 3min, temperature is down to less than 60 DEG C, then carries out straightening, permanent set: 0.5%～
1.0%, Ti/Zr passivation, Pre-aging treatment, Pre-aging treatment condition is 120 DEG C～180 DEG C, is incubated lmin～2min.
Method the most according to claim 3, it is characterised in that the cleaning molten of described step (1) uses multi-stage combination to melt
Body purification techniques.
Production method the most according to claim 3, it is characterised in that the Ti/Zr passivating film weight in described step (5):
2.0mg/m2≤Ti≤8.0mg/m2；Online Pre-aging treatment system is 145 DEG C/1min.
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| CN106917017A (en) * | 2017-03-28 | 2017-07-04 | 山东南山铝业股份有限公司 | Aluminum alloy plate materials and its production method |
| CN108165906A (en) * | 2018-01-23 | 2018-06-15 | 西南铝业（集团）有限责任公司 | A kind of production technology of 6061T651 lattens |
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