CN110079716A - It is automobile body-used to contain high manganese chromium 6XXX line aluminium alloy material and preparation method thereof - Google Patents
It is automobile body-used to contain high manganese chromium 6XXX line aluminium alloy material and preparation method thereof Download PDFInfo
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- CN110079716A CN110079716A CN201910435156.5A CN201910435156A CN110079716A CN 110079716 A CN110079716 A CN 110079716A CN 201910435156 A CN201910435156 A CN 201910435156A CN 110079716 A CN110079716 A CN 110079716A
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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
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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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
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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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
- C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
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- Crystallography & Structural Chemistry (AREA)
- Extrusion Of Metal (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention discloses automobile body-used containing high manganese chromium 6XXX line aluminium alloy material and preparation method thereof, alloy of the present invention increases Mn on the basis of JIS-6N01 alloy composition, Cr element breaks the upper limit of Mn+Cr < 0.5%, content is increased to Mn+Cr=0.5~0.75%, make profile tunneling boring deformation non-recrystallization tissue after squeezing, thus utmostly reduce Grain Boundary Precipitates, therefore profile is reduced to carry out in conquassation test process because of the probability along crystal boundary crack initiation, conquassation test rupture is avoided to promote to be easy folding and forming, and it folds rear surface and does not generate tangerine peel and corrugation.
Description
Technical field
The present invention relates to non-ferrous metal technical fields, are in particular automobile body-used containing high manganese chromium 6XXX line aluminium alloy
Material and preparation method thereof.
Background technique
In modern age automobile to exhaust gas (CO2) discharge limits and the persistently requirement of reduction energy consume, constantly promote automobile factory
Quotient quickly strides forward to lightweight direction.The most rapid approach of automotive light weight technology is wherein considered for steel with aluminium.Vehicle shell in full aluminium automobile,
Car body generally successfully uses aluminum alloy rolling plate, but it is less wherein to be compared using the structural member of aluminum alloy extrusion section bar, mainly
Such as battery frame of collision prevention girders, energy-absorption box, threshold body structural member and electric car.Such structure material in addition to must have compared with
Outside high mechanical performance, it is still necessary to good impact resistance fragmentation, corrosion resistance, heat resistanceheat resistant debilitating and easily formings, easy weldability, especially
It keeps not tearing and capable of largely absorbing impact energy in car crass to have the function that protect passenger's body life safety.In Europe
Industrially developed country largely uses the 6XXX such as ENAW-6082 and ENAW-6005A line aluminium alloy as the material of industrial products.
But these material alloys compositional ranges have been unable to satisfy modern automobile industry using material, and especially major automobile factory has devised
The MAT'L specification of a set of assessment material and performance indexes, such as AUDI-TL116, BMW-WS02003 and DAMLER-
DML4919.And each material supplier develops more suitable material more wholeheartedly to meet the requirement of major automobile factory, therefore makes
ENAW-6082, ENAW-6005A of formula, which have been excluded, to be selected except ranks, the numerous and confused ENAW-6082 for using correction,
ENAW-6005A such as ENAW-6082 add Cr, plus Cu and ENAW-6005A add the materials such as V (6008) reach higher impact resistance,
High energy-absorbing, heat resistanceheat resistant failure characteristic.And ageing treatment is more changed to by the higher spike timeliness T6 processing of tensile strength to improve surrender
Overaging T7 based on intensity handles to increase ductility in favor of by quasi-static axial crushing test therein.
German Adui proposes that AUDI-TL116 MAT'L specification is distinctly claimed the aluminium alloy material of different brackets yield strength
Material, except must have the mechanical property requirements after room temperature below and heat exposure:
Each state mechanical property requirements of TL116-C24:
Short cycle heating: 205 DEG C of * 1hr long period heating: 150 DEG C of * 1000hrs
The rule that special section necessarily is formed such as accordion for the profile of test after crushing test has also been devised to roll over
It is folded, it can not fragmentation.Furthermore Audi more promotes test section material section to three chambers three from " day " font material of the single wall thickness of two-chamber
" product " font material of a wall thickness, conquassation test specific steps and requirement are as follows: 300mm long profiles both ends are cut flat with, cutting precision
Within ± 0.5 °, places vertically between upper and lower two horizontal plates, must not fix or guide, with the compression speed of 100mm/min
Profile regular must fold after profile is pressed onto surplus 100mm, there is not allowed that rupture and serious tangerine peel, but allow initial crack in 15mm
Within.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides automobile body-used containing high manganese chromium 6XXX line aluminium alloy material and its
Preparation method, the present invention have higher thermal stability, and the intensity failure after being highly resistant to heat exposure is worthy to be popularized and answers
With.
In order to achieve the above object, Mn+Cr is increased to 0.5-0.75% on the basis of existing JIS-6N01 alloy by the present invention,
And it is achieved by the following technical programs: automobile body-used containing high manganese chromium 6XXX line aluminium alloy material and preparation method thereof, packet
The Si of ingredient 0.55-0.65%, the Fe of < 0.3%, the Mn of the Cu of < 0.15-0.25%, 0.4-0.5% are included, 0.6-0.7%'s
The inevitable impurity member of the Mn+Cr of the Ti of the Zn of the Cr of Mg, 0.15-0.2%, < 0.15%, 0.02-0.05%, 0.6-0.7%
Every kind of < 0.05% of element, and inevitable impurity element total amount < 0.15%, surplus is aluminium.
The preparation method includes:
A. stock up: with pure metallic aluminum, magnesium, copper, Al-Si intermediate alloy, chromium agent, manganese agent, the agent of titanium boron, titanium boron wire according to alloy at
Part ingredient prepares.
B. founding: raw material investment heat accumulating type natural gas aluminium melting furnace will be prepared and carry out melting, metal fine aluminium, Al- is first added
Si intermediate alloy after fusing, adds metallic copper；It is warming up to 740 DEG C~750 DEG C addition manganese agent, chromium agent and pure metal magnesium, is waited until
After these metals are stirred evenly and sufficiently melted, it is warming up to 750 DEG C~760 DEG C and reuses particle slagging-off, degasifier and high-purity argon
Gas disposal molten aluminum 10~15 minutes, and stand and cast after twenty minutes.Casting Equipment is the casting of semicontinuous vertical automatic hydraulic
Machine, for cast temperature at 730 DEG C~740 DEG C, Al-Ti-B refinement crystal grain are added in whole process, and double with chute rotator type and double-box type
Dehydrogenation on weight line, is cast into ∮ 203mm finally by after the dual ceramic filter of 30&50PPI with the hot direct casting disk of 8 inches of same levels
Stick.
C. Homogenization Treatments: Homogenization Treatments are carried out with gas-fired heater, after 550 DEG C~560 DEG C keep the temperature 8~10 hours
Cooling furnace strong wind cooling is gone to again.
D. it squeezes: the long stick after Homogenization Treatments being cut into the stub of 500-700mm, with directly-firing gas furnace heat temperature raising
To 510 DEG C of immigrations, 2200 tonnes of forward extrusion machines, with extrusion ratio 25.3,1.5~2.5mm/s of master cylinder speed squeezes out profile.
E. press quenching: section bar extrusion outlet keeps temperature to reach 520 DEG C~545 DEG C, and the profile of extrusion is penetrated sink
Hardening is on progress line to reach material T4 solution treatment effect.
F. ageing treatment: will treated profile carries out respectively after room temperature is parked 48 hours spike ageing treatment and out-of-date
Effect processing.
Further: spike aging temperature is 175 DEG C in the step f, and constant temperature is kept for 8 hours, at overaging
Managing temperature is that 190 DEG C~210 DEG C constant temperature are kept for 4-7 hours.
Further: alloy spike timeliness, overaging made of described and the tensile strength after short cycle heating need not
Less than 260Mpa, yield strength after spike timeliness, overaging and short cycle heating need to be between 241-280Mpa, when spike
Elongation percentage after effect, overaging and short cycle heating need to be not less than 10%, and in addition the yield strength after long period heats is not small
In 230Mpa, to meet the MAT'L specification demand of Adui TL116-C24.
Further: aluminium alloy made of described is common to the position of car body impact resistant.
The present invention provides a kind of high energy absorption capacity structure 6XXX line aluminium alloys and preparation method thereof of impact resistance, have following
The utility model has the advantages that
It carries out avoiding conquassation test rupture because of the probability along crystal boundary crack initiation in conquassation test process present invention reduces profile
Promote to be easy folding and forming, and folds rear surface and do not generate tangerine peel and corrugation.
Detailed description of the invention
Fig. 1 is alloy extrusion of the present invention into the cross section before the conquassation test of three chambers, three thickness profile；
Fig. 2 is profile conquassation test passes exemplar after alloy aging of the present invention processing；
Fig. 3 is profile conquassation test failure exemplar after European Union ENAW-6005A comparative alloy ageing treatment
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution: automobile body-used to contain high manganese chromium 6XXX line aluminium alloy material and its preparation side
Method, the Fe of the Si including ingredient 0.55-0.65%, < 0.3%, the Mn of the Cu of < 0.15-0.25%, 0.4-0.5%, 0.6-
The Mn+Cr of the Ti of the Zn of the Cr of 0.7% Mg, 0.15-0.2%, < 0.15%, 0.02-0.05%, 0.6-0.7% can not be kept away
Exempt from every kind of < of impurity element 0.05%, and inevitable impurity element total amount < 0.15%, surplus is aluminium.
The preparation method includes:
Stock: with pure metallic aluminum, magnesium, copper, Al-Si intermediate alloy, chromium agent, manganese agent, the agent of titanium boron, titanium boron wire are according to alloy composition
Ingredient prepares.
Founding: raw material investment heat accumulating type natural gas aluminium melting furnace will be prepared and carry out melting, metal fine aluminium, Al-Si is first added
Intermediate alloy after fusing, adds metallic copper；It is warming up to 740 DEG C~750 DEG C addition manganese agent, chromium agent and pure metal magnesium, waits until this
After a little metals are stirred evenly and sufficiently melted, it is warming up to 750 DEG C~760 DEG C and reuses particle slagging-off, degasifier and high-purity argon gas
Processing molten aluminum 10~15 minutes, and stand and cast after twenty minutes.Casting Equipment is semicontinuous vertical automatic hydraulic casting machine,
Cast temperature is at 730 DEG C~740 DEG C, and Al-Ti-B refinement crystal grain are added in whole process, and with chute rotator type and double-box type doublet
Upper dehydrogenation is cast into ∮ 203mm stick finally by after the dual ceramic filter of 30&50PPI with the hot direct casting disk of 8 inches of same levels.
Homogenization Treatments: carrying out Homogenization Treatments with gas-fired heater, after keeping the temperature 8~10 hours at 550 DEG C~560 DEG C again
Go to cooling furnace strong wind cooling.
It squeezes: the long stick after Homogenization Treatments being cut into the stub of 500-700mm, is heated to directly-firing gas furnace
510 DEG C of immigrations, 2200 tonnes of forward extrusion machines, with extrusion ratio 25.3,1.5~2.5mm/s of master cylinder speed squeezes out profile.
Press quenching: section bar extrusion outlet keeps temperature to reach 520 DEG C~545 DEG C, and the profile of extrusion is put and penetrates sink
Hardening is on progress line to reach material T4 solution treatment effect.
Ageing treatment: by treated, profile carries out spike ageing treatment and overaging after room temperature is parked 48 hours respectively
Processing.
Embodiment 1:
A. it stocks up: alloy component range according to the present invention, with pure metallic aluminum, magnesium, copper, Al-Si intermediate alloy, chromium agent, manganese
Agent, the agent of titanium boron, titanium boron wire, according to the Si of ingredient 0.59%, 0.13% Fe, 0.22% Cu, 0.41% Mn, 0.68%
Mg, 0.18% Cr, 0.02% Zn, 0.03% Ti, 0.6% Mn+Cr, every kind of < of inevitable impurity element
0.05%, and inevitable impurity element total amount < 0.15%, surplus are aluminium alloy composition.
B. founding: raw material investment heat accumulating type natural gas aluminium melting furnace will be prepared and carry out melting, metal fine aluminium, Al- is first added
Si intermediate alloy after fusing, adds metallic copper；It is warming up to 740 DEG C~750 DEG C addition manganese agent, chromium agent and pure metal magnesium, is waited until
After these metals are stirred evenly and sufficiently melted, it is warming up to 750 DEG C~760 DEG C and reuses particle slagging-off, degasifier and high-purity argon
Gas disposal molten aluminum 10~15 minutes, and stand and cast after twenty minutes.Casting Equipment is the casting of semicontinuous vertical automatic hydraulic
Machine, for cast temperature at 730 DEG C~740 DEG C, Al-Ti-B refinement crystal grain are added in whole process, and double with chute rotator type and double-box type
Dehydrogenation on weight line, is cast into ∮ 203mm finally by after the dual ceramic filter of 30&50PPI with the hot direct casting disk of 8 inches of same levels
Stick.
C. Homogenization Treatments: Homogenization Treatments are carried out with gas-fired heater, after 550 DEG C~560 DEG C keep the temperature 8~10 hours
Cooling furnace strong wind cooling is gone to again.
D. it squeezes: the long stick after Homogenization Treatments being cut into the stub of 500-700mm, with directly-firing gas furnace heat temperature raising
To 510 DEG C of immigrations, 2200 tonnes of forward extrusion machines, with extrusion ratio 25.3,1.5~2.5mm/s of master cylinder speed squeezes out profile.
E. press quenching: section bar extrusion outlet keeps temperature to reach 520 DEG C~545 DEG C, and the profile of extrusion is penetrated sink
Hardening is on progress line to reach material T4 solution treatment effect.
F. ageing treatment: will treated profile carries out respectively after room temperature is parked 48 hours spike ageing treatment and out-of-date
Effect processing.
G. it detects: by the profile after Wetted constructures according to TL116 requirement, respectively with the short cycle heating of 205 DEG C of * 1hr
And carry out the detection of room temperature mechanical performance after the long period heating of 150 DEG C of * 1000hrs, respectively obtain made of alloy spike timeliness,
Overaging, short cycle heating after and long period heating after tensile strength be respectively 306Mpa, 303Mpa, 291Mpa and
285Mpa, spike timeliness, overaging, short cycle heating after and long period heating after yield strength be respectively 278Mpa,
273Mpa, 256Mpa and 252Mpa, the elongation percentage difference after spike timeliness, overaging, short cycle heating and after long period heating
It is 14.1%, 13.5%, 13.5% and 14.7%, meets the MAT'L specification demand of Adui TL116-C24.
Comparative example 1:
Test is compared according to ENAW-6005A material requirements production material, is stocked up: with pure metallic aluminum, magnesium, copper, Al-
Si intermediate alloy, chromium agent, manganese agent, the agent of titanium boron, titanium boron wire, the Si's, 0.14% Fe, 0.14% that foundation ingredient is 0.61%
Cu, 0.08% Mn, 0.62% Mg, 0.065% Cr, 0.02% Zn, 0.03% Ti, 0.15% Mn+Cr, according to
Embodiment step b~f carries out that the profile after timeliness is made, and finally carries out step g and is detected to obtain: when manufactured alloy spike
Effect, overaging, short cycle heating after and long period heating after tensile strength be respectively 306Mpa, 303Mpa, 291Mpa and
285Mpa, spike timeliness, overaging, short cycle heating after and long period heating after yield strength be respectively 278Mpa,
273Mpa, 256Mpa and 252Mpa, the elongation percentage difference after spike timeliness, overaging, short cycle heating and after long period heating
It is 14.1%, 13.5%, 13.5% and 14.7%, also complies with the MAT'L specification demand of Adui TL116-C24.
Embodiment and comparative example in summary carries out data comparison and obtains:
Alloy of the present invention and comparative alloy composition table of comparisons unit %
Each state mechanical performance of isosceles triangle profile and TL116-C24 require the table of comparisons
TL116-C24 profile each state machine of the two kinds of alloy profiles of above embodiments and comparative example according to " background technique "
Tool performance requirement and TL116 conquassation test specific steps respectively obtain after carrying out conquassation test with requirement to draw a conclusion: the present invention
Mechanical performance can meet TL116-C24 grades of material requirements, profile energy after conquassation test to alloy embodiment under various regimes
Rule folds, and fold surface is smooth careful, has no coarse corrugation at each corner S type folding, and all surface does not have initial crack,
Sufficiently achieve the requirement of TL116 conquassation test.Alloy of the present invention, which has passed through the L116-C24 grades of testings of materials of Shanghai Volkswagen's company's T, to be recognized
Card is qualified, formally becomes its aluminium extruded type supplier.
Although various state mechanical performances are all satisfied TL116-C24 requirement to ENAW-6005A alloy in comparative example, and are crushed
Foldable molding is tested, also has no slight crack, but folds the serious skinning of rear surface and corrugation, does not still meet TL116 conquassation test
Requirement.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of automobile body-used containing high manganese chromium 6XXX line aluminium alloy material, the Si including ingredient 0.55-0.65%, < 0.3%
Fe, the Cr's of the Mg of the Mn of the Cu of < 0.15-0.25%, 0.4-0.5%, 0.6-0.7%, 0.15-0.2%, < 0.15%
Every kind of < of the inevitable impurity element of the Mn+Cr of the Ti of Zn, 0.02-0.05%, 0.6-0.7% 0.05%, and it is inevitable miscellaneous
Prime element total amount < 0.15%, surplus is aluminium.
2. a kind of automobile body-used preparation method containing high manganese chromium 6XXX line aluminium alloy material, it is characterised in that: the preparation side
Method includes:
A. stock up: with pure metallic aluminum, magnesium, copper, Al-Si intermediate alloy, chromium agent, manganese agent, the agent of titanium boron, titanium boron wire are matched according to alloy composition
Material prepares.
B. founding: raw material investment heat accumulating type natural gas aluminium melting furnace will be prepared and carry out melting, metal fine aluminium is first added, in Al-Si
Between alloy, after fusing, add metallic copper；It is warming up to 740 DEG C~750 DEG C addition manganese agent, chromium agent and pure metal magnesium, waits until these
After metal is stirred evenly and sufficiently melted, it is warming up to 750 DEG C~760 DEG C and reuses at particle slagging-off, degasifier and high-purity argon gas
Reason molten aluminum 10~15 minutes, and stand and cast after twenty minutes.Casting Equipment is semicontinuous vertical automatic hydraulic casting machine, is poured
Temperature is cast at 730 DEG C~740 DEG C, and Al-Ti-B refinement crystal grain are added in whole process, and on chute rotator type and double-box type doublet
Dehydrogenation is cast into ∮ 203mm stick finally by after the dual ceramic filter of 30&50PPI with the hot direct casting disk of 8 inches of same levels.
C. Homogenization Treatments: carrying out Homogenization Treatments with gas-fired heater, turns again after keeping the temperature 8~10 hours at 550 DEG C~560 DEG C
To cooling furnace strong wind cooling.
D. it squeezes: the long stick after Homogenization Treatments being cut into the stub of 500-700mm, is heated to directly-firing gas furnace
510 DEG C of immigrations, 2200 tonnes of forward extrusion machines, with extrusion ratio 25.3,1.5~2.5mm/s of master cylinder speed squeezes out profile.
E. press quenching: section bar extrusion outlet keeps temperature to reach 520 DEG C~545 DEG C, and the profile of extrusion is penetrated sink and is carried out
Hardening is on line to reach material T4 solution treatment effect.
F. ageing treatment: will treated that profile carries out at spike ageing treatment and overaging respectively after room temperature is parked 48 hours
Reason.
3. the automobile body-used preparation method containing high manganese chromium 6XXX line aluminium alloy material of one kind according to claim 2,
Be characterized in that: spike aging temperature is 175 DEG C in the step f, and constant temperature is kept for 8 hours, and Wetted constructures temperature is
190 DEG C~210 DEG C constant temperature are kept for 4-7 hours.
4. one kind according to claim 1 is automobile body-used to contain high manganese chromium 6XXX line aluminium alloy material, it is characterised in that: institute
Alloy spike timeliness, overaging made of stating and the tensile strength after short cycle heating are needed not less than 260Mpa, spike timeliness,
Yield strength after overaging and short cycle heating need to be between 241-280Mpa, spike timeliness, overaging and short cycle heating
Elongation percentage afterwards need to be not less than 10%, and in addition the yield strength after long period heats is not less than 230Mpa, to meet Audi's vapour
The MAT'L specification demand of vehicle TL116-C24.
5. one kind according to claim 1 is automobile body-used to contain high manganese chromium 6XXX line aluminium alloy material, it is characterised in that: institute
Aluminium alloy made of stating is common to the position of car body impact resistant.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111440972A (en) * | 2020-05-29 | 2020-07-24 | 台山市金桥铝型材厂有限公司 | 6000 series aluminum alloy with high long-term thermal stability and preparation method thereof |
| CN112359254A (en) * | 2020-11-24 | 2021-02-12 | 辽宁忠旺集团有限公司 | Production process of aluminum alloy anti-collision beam with high strength and high plasticity |
| CN112439879A (en) * | 2020-11-12 | 2021-03-05 | 成都阳光铝制品有限公司 | Production process of aluminum profile for automobile battery end plate |
| CN114769345A (en) * | 2022-04-26 | 2022-07-22 | 广东金协成铝业有限公司 | Manufacturing method of high-strength 6008 alloy extruded section and extruded section |
| WO2023279493A1 (en) * | 2021-07-05 | 2023-01-12 | 宁波信泰机械有限公司 | High-strength and high-toughness impact-resistant energy-absorbing al-mg-si alloy |
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