CN101760681B - Manufacturing method of high damage tolerance type 2E12 aluminium alloy plate - Google Patents
Manufacturing method of high damage tolerance type 2E12 aluminium alloy plate Download PDFInfo
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- CN101760681B CN101760681B CN2009103124077A CN200910312407A CN101760681B CN 101760681 B CN101760681 B CN 101760681B CN 2009103124077 A CN2009103124077 A CN 2009103124077A CN 200910312407 A CN200910312407 A CN 200910312407A CN 101760681 B CN101760681 B CN 101760681B
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Abstract
The invention provides a manufacturing method of a high damage tolerance type 2E12 aluminium alloy plate, relating to a manufacturing method of an aluminium alloy plate; the method solves the problems that the high damage tolerance type 2E12 aluminium alloy plate is easy to generate cracks in the casting process, the plate shape control is difficult and the comprehensive performance of the manufactured 2E12 thin plate is poor. The method comprises the following steps: 1. slab ingot alloy is manufactured; 2. homogenizing annealing is carried out; 3. hot crimping is carried out; 4. cold rolling is carried out; 5. hot treatment is carried out; 6. pressure polishing and straightening are carried out. In the manufacturing process, no cracks are generated; and the manufactured high damage tolerance type 2E12 aluminium alloy plate has good comprehensive mechanical property.
Description
Technical field
The present invention relates to a kind of making method of Aluminium Alloy Plate.
Background technology
What China's aircraft skin mainly used for a long time is 2A12 (LY12) alloy suitable with 2024, and along with the development of aeronautical product, the 2A12 covering can not satisfy aircraft safety, reliability and long-life service requirements gradually.High-damage tolerance type 2E12 aluminium alloy belongs to the Al-Cu-Mg line aluminium alloy, has excellent comprehensive performances after this sheet alloy thermal treatment, especially the high characteristics of anti-damage tolerance ability, therefore can close thin plate as aircraft skin with high-damage tolerance type 2E12 aluminium, satisfy the design service requirements of aircraft high security, long lifetime property.But high damage tolerance type 2 E 12 aluminium alloy plate is easy to generate crackle in the castingprocesses of development, and template control is difficulty, and it is poor to make the over-all properties of the 2E12 thin plate that obtains, and has limited high damage tolerance type 2 E 12 aluminium alloy plate.
Summary of the invention
The present invention is easy to generate crackle in order to solve high damage tolerance type 2 E 12 aluminium alloy plate in the castingprocesses of development, template control provides the making method of high damage tolerance type 2 E 12 aluminium alloy plate than problem difficult and that make the over-all properties difference of the 2E12 thin plate that obtains.
The making method of high damage tolerance type 2 E 12 aluminium alloy plate of the present invention is carried out according to following steps:: one, 92～94 parts aluminium ingot, 4.0～4.5 parts copper, 1.2～1.6 parts magnesium ingot and 4.5～7 parts alumal mixing are cast as the slab ingot alloy of 300 * 500mm or the slab ingot alloy of 440 * 500mm according to ratio of weight and number; Two, the slab ingot alloy heated 5～7 hours under 510～550 ℃ of conditions, cooled the temperature to 485～495 ℃ of insulations 22～26 hours then; Three, the blank that thickness is 6～10mm is made in the slab ingot alloy hot rolling after step 2 is handled, and curls on the direct heat, and start rolling temperature is 370～410 ℃, and finishing temperature is 250～350 ℃; Four, blank is placed under 300 ℃～340 ℃ conditions and heated 2～4 hours, come out of the stove after cooling to 230～260 ℃ then with the furnace,, be cold-rolled to the sheet material that finished product thickness is 1.5mm～4.0mm again through the process annealing material of air cooling; Five, sheet material carries out solution treatment behind soaking time 10～30min under 496～450 ℃ the condition, and transfer time, coolant water temperature was less than 30 ℃ less than 30 seconds; Six, with the sheet material press polish aligning after the step 5 processing, the cold deformation rate is 20%～80%, promptly obtains high damage tolerance type 2 E 12 aluminium alloy plate.
The present invention makes in the high damage tolerance type 2 E 12 aluminium alloy plate obtain the Al that comprises 4.0%～4.5% Cu, 1.2%～1.6% Mg, 0.45%～0.7% Mn, 0%～0.05% Cr, 0%～0.15% Zn, 0%～0.06% Si, 0%～0.12% Fe, 0%～0.10% Ti, 0～0.15% impurity and surplus according to weight percent.
Method of the present invention does not crack in making processes, and make the good combination property that obtains high damage tolerance type 2 E 12 aluminium alloy plate, the present invention makes the high damage tolerance type 2 E 12 aluminium alloy plate that obtains and carries out the mechanical property detection, tensile strength is 450～465Mpa, yield strength is 310～340Mpa, unit elongation is 19%～23%, fatigue crack growth rate≤3.05 * 10
-3Mm/cycle (Δ k=33Mpam
1/2), specific conductivity 28.5～32.0%ICAS.
Embodiment
Embodiment one: the making method of present embodiment high damage tolerance type 2 E 12 aluminium alloy plate is carried out according to following steps: one, according to ratio of weight and number 92～94 parts aluminium ingot, 4.0～4.5 parts copper, 1.2～1.6 parts magnesium ingot and 4.5～7.0 parts alumal mixing are cast as the slab ingot alloy of 300 * 500mm or the slab ingot alloy of 440 * 500mm; Two, the slab ingot alloy heated 5～7 hours under 510～550 ℃ of conditions, cooled the temperature to 485～495 ℃ of insulations 22～26 hours then; Three, the blank that thickness is 6～10mm is made in the slab ingot alloy hot rolling after step 2 is handled, and curls on the direct heat, and start rolling temperature is 370～410 ℃, and finishing temperature is 250～350 ℃; Four, blank is placed under 300 ℃～340 ℃ conditions and heated 2～4 hours, come out of the stove after cooling to 230～260 ℃ then with the furnace,, be cold-rolled to the sheet material that finished product thickness is 1.5mm～4.0mm more again through the process annealing material of air cooling; Five, sheet material carries out solution treatment behind soaking time 10～30min under 496～500 ℃ the condition, and transfer time, coolant water temperature was less than 30 ℃ less than 30 seconds; Six, with the sheet material press polish aligning after the step 5 processing, the cold deformation rate is 20%～80%, promptly obtains high damage tolerance type 2 E 12 aluminium alloy plate.
Homogenizing annealing can be eliminated grain segregation and casting stress in the present embodiment step 2, makes sheet material have better machining property.
Present embodiment is made in the high damage tolerance type 2 E 12 aluminium alloy plate obtain the Al that comprises 4.0%～4.5% Cu, 1.2%～1.6% Mg, 0.45%～0.7% Mn, 0%～0.05% Cr, 0%～0.15% Zn, 0%～0.06% Si, 0%～0.12% Fe, 0%～0.10% Ti, 0～0.15% impurity and surplus according to weight percent.
The method of present embodiment does not crack in making processes, and make the good combination property that obtains high damage tolerance type 2 E 12 aluminium alloy plate, present embodiment is made the high damage tolerance type 2 E 12 aluminium alloy plate that obtains and is carried out the mechanical property detection, tensile strength is 450～465Mpa, yield strength is 310～340Mpa, unit elongation is 19%～23%, fatigue crack growth rate≤3.05 * 10
-3Mm/cycle (Δ k=33Mpam
1/2), specific conductivity 28.5～32.0%ICAS meets the requirement of technical indicator, and is higher than technical indicator (technical indicator: σ=1.0～4.0, direction LT, tensile strength R
m(MPa) 〉=427, yield strength R
P0.2(MPa) 〉=275, unit elongation A (%) 〉=15).
Embodiment two: what present embodiment and embodiment one were different is: the aluminium ingot in the step 1 is that 99.99% fine aluminium ingot and 20～40 parts aluminium alloy cast ingot are formed according to ratio of weight and number by 50～70 parts purity.Other step and parameter are different with embodiment one.
Embodiment three: what present embodiment was different with embodiment one or two is: the castmethod of 300 * 500mm slab ingot alloy is in the step 1: will be to cast under 700～720 ℃ of conditions in casting temp behind the raw material mixed smelting, casting speed is 55～60mm/min, and hydraulic pressure is 0.8～1.5Mpa.Other step and parameter are identical with embodiment one or two.
The concrete making method of the slab ingot alloy of present embodiment 300 * 500mm is carried out according to following steps: one, melting: adopt electric furnace to haul oneself willingly into solid material mode, raw material is packed in the stove, before shove charge, must thoroughly put stove dried, carry out alloy melting then, alloy melting temp is 700～720 ℃, and in this scope, take a sample, wanting conscientious before the sampling thoroughly stirs, adopt 2# flux to cover without exception before alloy melting stays and when adding magnesium ingot, the stokehold Composition Control is not mended Fe, and Mg mends to 1.4%, the Al-5Ti-1B silk is broadcast into, the electric furnace preceding Ar-Cl that comes out of the stove in that filter inlet is online
2Refining 10min; Two, casting: leave standstill stove and lead the conscientious secondary prepurging in stokehold, the good 2# flux of the preheating piece folded dam of coming out of the stove, full packages flows, and the melt after the step 1 melting is used Ar-Cl after importing and leaving standstill stove
2Refining 15min, stove walk the Alpur degasifying device outward, survey hydrogen after leaving standstill 10min, hydrogen richness standard=0.18ml/100g metal, the 30min casting is left standstill in defective additional refining, and 2# flux covers, adopt vitrified pipe to filter and foamed ceramic panel twin-stage purification filtering on the casting streamline, wherein every casting time ingot casting of casting, thickening fine aluminium shop fixtures thickness, the parameter of casting technique is: casting temp is to cast under 700～720 ℃ of conditions, casting speed is 55～60mm/min, and hydraulic pressure is 0.8～1.5Mpa.This method making obtains the slab ingot alloying constituent and satisfies standard-required, has solved casting crack, has improved melt quality, has produced qualified ingot casting.
Embodiment four: what present embodiment was different with embodiment one or two is: the castmethod of the 440 * 500mm slab ingot alloy in the step 1 is: it is to cast under 695～715 ℃ of conditions that raw material is blended in casting temp, casting speed is 45～50mm/min, and hydraulic pressure is 0.6～1.0Mpa.Other step and parameter are identical with embodiment one or two.
The concrete making method of the slab ingot alloy of present embodiment 440 * 500mm is carried out according to following steps: one, melting: adopt electric furnace to haul oneself willingly into solid material mode, raw material is packed in the stove, before shove charge, must thoroughly put stove dried, carry out alloy melting then, alloy melting temp is 700～720 ℃, and in this scope, take a sample, wanting conscientious before the sampling thoroughly stirs, adopt 2# flux to cover without exception before alloy melting stays and when adding magnesium ingot, the stokehold Composition Control is not mended Fe, and Mg mends to 1.4%, the Al-5Ti-1B silk is broadcast into, the electric furnace preceding Ar-Cl that comes out of the stove in that filter inlet is online
2Refining 10min; Two, casting: leave standstill stove and lead the conscientious secondary prepurging in stokehold, the good 2# flux of the preheating piece folded dam of coming out of the stove, full packages flows, and the melt after the step 1 melting is used Ar-Cl after importing and leaving standstill stove
2Refining 15min, stove walk the Alpur degasifying device outward, survey hydrogen after leaving standstill 10min, hydrogen richness standard=0.18ml/100g metal, the 30min casting is left standstill in defective additional refining, and 2# flux covers, adopt vitrified pipe to filter and foamed ceramic panel twin-stage purification filtering on the casting streamline, wherein every casting time ingot casting of casting, thickening fine aluminium shop fixtures thickness, the parameter of casting technique is: casting temp is to cast under 695～715 ℃ of conditions, casting speed is 45～50mm/min, and hydraulic pressure is 0.6～1.0Mpa.This method making obtains the slab ingot alloying constituent and satisfies standard-required, has solved casting crack, has improved melt quality, has produced qualified ingot casting.
Embodiment five: what present embodiment and embodiment one to four were different is that the slab ingot alloy heated 6 hours under 530 ℃ of conditions in the step 2, cools the temperature to 480 ℃ of insulations 24 hours then.Other step and parameter are identical with embodiment one to four.
Embodiment six: what present embodiment and embodiment one to five were different is that the blank that thickness is 7mm～9mm is made in the hot rolling of slab ingot alloy in the step 3.Other step and parameter are identical with embodiment one to five.
Embodiment seven: what present embodiment and embodiment one to six were different is that start rolling temperature is 380～400 ℃ in the step 3, and finishing temperature is 280～330 ℃.Other step and parameter are identical with embodiment one to six.
Embodiment eight: present embodiment and embodiment one to seven are different is in the step 4 blank to be placed under 320 ℃ of conditions heating 3 hours.Other step and parameter are identical with embodiment one to seven.
Embodiment nine: what present embodiment and embodiment one to eight were different is to come out of the stove after cooling to 250 ℃ in the step 4 with the furnace.Other step and parameter are identical with embodiment one to eight.
Embodiment ten: what present embodiment and embodiment one to nine were different is that sheet material carries out solution treatment in the step 4 behind soaking time 20min under 498 ℃ the condition.Other step and parameter are identical with embodiment one to nine.
Embodiment 11: the making method of present embodiment high damage tolerance type 2 E 12 aluminium alloy plate is carried out according to following steps: one, according to ratio of weight and number 92 parts aluminium ingot, 4.3 parts copper, 1.4 parts magnesium ingot and 6 parts alumal are mixed the slab ingot alloy that is cast as 300 * 500mm; Two, the slab ingot alloy heated 6 hours under 540 ℃ of conditions, cooled the temperature to 490 ℃ of insulations 24 hours then; Three, the blank that thickness is 8mm is made in the slab ingot alloy hot rolling after step 2 is handled, and curls on the direct heat, and start rolling temperature is 400 ℃, and finishing temperature is 300 ℃; Four, blank is placed under 320 ℃ of conditions heating 3 hours, come out of the stove after cooling to 240 ℃ then with the furnace,, be cold-rolled to the sheet material that finished product thickness is 1.5mm again through the process annealing material of air cooling; Five, sheet material carries out solution treatment behind soaking time 20min under 498 ℃ the condition, and transfer time, coolant water temperature was less than 30 ℃ less than 30 seconds; Six, with the sheet material press polish aligning after the step 5 processing, the cold deformation rate is 60%, promptly obtains high damage tolerance type 2 E 12 aluminium alloy plate.
The concrete making method of the slab ingot alloy of 300 * 500mm in the present embodiment step 1 is carried out according to following steps: one, melting: adopt electric furnace to haul oneself willingly into solid material mode, raw material is packed in the stove, before shove charge, must thoroughly put stove dried, carry out alloy melting then, alloy melting temp is 700～720 ℃, and in this scope, take a sample, wanting conscientious before the sampling thoroughly stirs, adopt 2# flux to cover without exception before alloy melting stays and when adding magnesium ingot, the stokehold Composition Control is not mended Fe, and Mg mends to 1.4%, the Al-5Ti-1B silk is broadcast into, the electric furnace preceding Ar-Cl that comes out of the stove in that filter inlet is online
2Refining 10min; Two, casting: leave standstill stove and lead the conscientious secondary prepurging in stokehold, the good 2# flux of the preheating piece folded dam of coming out of the stove, full packages flows, and the melt after the step 1 melting is used Ar-Cl after importing and leaving standstill stove
2Refining 15min, stove walk the Alpur degasifying device outward, survey hydrogen after leaving standstill 10min, hydrogen richness standard=0.18ml/100g metal, the 30min casting is left standstill in defective additional refining, and 2# flux covers, adopt vitrified pipe to filter and foamed ceramic panel twin-stage purification filtering on the casting streamline, wherein every casting time ingot casting of casting, thickening fine aluminium shop fixtures thickness, the parameter of casting technique is: casting temp is to cast under 700～720 ℃ of conditions, casting speed is 55～60mm/min, and hydraulic pressure is 0.8～1.5Mpa.This method making obtains the slab ingot alloying constituent and satisfies standard-required, has solved casting crack, has improved melt quality, has produced qualified ingot casting.
Homogenizing annealing can be eliminated grain segregation and casting stress in the present embodiment step 2, makes sheet material have better machining property.
Solution treatment in the present embodiment step 2: 2 timeliness, natural aging are 100 hours.
The middle air cooling technology of present embodiment step 4 is a kind of a kind of method of controlling room temp, promptly produces through aluminum bromide to be lower than 5 ℃ water, lowers the temperature to indoor with blower fan then.
Present embodiment is made in the high damage tolerance type 2 E 12 aluminium alloy plate obtain the Al that comprises 4.2% Cu, 1.5% Mg, 0.6% Mn, 0.01% Cr, 0.05% Zn, 0.01% Si, 0.05% Fe, 0.03% Ti, 0.06% impurity and surplus according to weight percent.
The method of present embodiment does not crack in making processes, and make the good combination property that obtains high damage tolerance type 2 E 12 aluminium alloy plate, present embodiment is made the high damage tolerance type 2 E 12 aluminium alloy plate that obtains and is carried out the mechanical property detection, tensile strength is 450～465Mpa, yield strength is 310～340Mpa, unit elongation is 19%～23%, fatigue crack growth rate≤3.05 * 10
-3Mm/cycle (Δ k=33Mpam
1/2), specific conductivity 28.5～32.0%ICAS meets the requirement of technical indicator, and is higher than technical indicator (technical indicator: σ=1.0～4.0, direction LT, tensile strength R
m(MPa) 〉=427, yield strength R
P0.2(MPa) 〉=275, unit elongation A (%) 〉=15).
Embodiment 12: what present embodiment and embodiment 11 were different is: the slab ingot alloy that is cast as 440 * 500mm in the step 1.Other steps and parameter are identical in embodiment 11.
The concrete making method of the slab ingot alloy of present embodiment 440 * 500mm is carried out according to following steps: one, melting: adopt electric furnace to haul oneself willingly into solid material mode, raw material is packed in the stove, before shove charge, must thoroughly put stove dried, carry out alloy melting then, alloy melting temp is 700～720 ℃, and in this scope, take a sample, wanting conscientious before the sampling thoroughly stirs, adopt 2# flux to cover without exception before alloy melting stays and when adding magnesium ingot, the stokehold Composition Control is not mended Fe, and Mg mends to 1.4%, the Al-5Ti-1B silk is broadcast into, the electric furnace preceding Ar-Cl that comes out of the stove in that filter inlet is online
2Refining 10min; Two, casting: leave standstill stove and lead the conscientious secondary prepurging in stokehold, the good 2# flux of the preheating piece folded dam of coming out of the stove, full packages flows, and the melt after the step 1 melting is used Ar-Cl after importing and leaving standstill stove
2Refining 15min, stove walk the Alpur degasifying device outward, survey hydrogen after leaving standstill 10min, hydrogen richness standard=0.18ml/100g metal, the 30min casting is left standstill in defective additional refining, and 2# flux covers, adopt vitrified pipe to filter and foamed ceramic panel twin-stage purification filtering on the casting streamline, wherein every casting time ingot casting of casting, thickening fine aluminium shop fixtures thickness, the parameter of casting technique is: casting temp is to cast under 695～715 ℃ of conditions, casting speed is 45～50mm/min, and hydraulic pressure is 0.6～1.0Mpa.This method making obtains the slab ingot alloying constituent and satisfies standard-required, has solved casting crack, has improved melt quality, has produced qualified ingot casting.
Embodiment 13: what present embodiment and embodiment 11 to 12 were different is: be cold-rolled to the sheet material that finished product thickness is 2mm in the step 4.Other steps and parameter are in embodiment 11 to 12 together.
Embodiment 14: be cold-rolled to the sheet material that finished product thickness is 2.5mm in the different step 4 of present embodiment and embodiment 11 to 12.Other steps and parameter are in embodiment 11 to 12 together.
Embodiment 15: be cold-rolled to the sheet material that finished product thickness is 4mm in the different step 4 of present embodiment and embodiment 11 to 12.Other steps and parameter are in embodiment 11 to 12 together.
Claims (9)
1. the making method of high damage tolerance type 2 E 12 aluminium alloy plate is characterized in that the making method of high damage tolerance type 2 E 12 aluminium alloy plate is carried out according to following steps: one, according to ratio of weight and number 92～94 parts aluminium ingot, 4.0～4.5 parts copper, 1.2～1.6 parts magnesium ingot and 4.5～7 parts alumal mixing are cast as the slab ingot alloy of 300 * 500mm or the slab ingot alloy of 440 * 500mm; Two, the slab ingot alloy heated 5～7 hours under 510～550 ℃ of conditions, cooled the temperature to 485～495 ℃ of insulations 22～26 hours then; Three, the blank that thickness is 6～10mm is made in the slab ingot alloy hot rolling after step 2 is handled, and curls on the direct heat, and start rolling temperature is 370～410 ℃, and finishing temperature is 250～350 ℃; Four, blank is placed under 300 ℃～340 ℃ conditions and heated 2～4 hours, come out of the stove after cooling to 230～260 ℃ then with the furnace,, be cold-rolled to the sheet material that finished product thickness is 1.5mm～4.0mm again through the process annealing material of air cooling; Five, sheet material carries out solution treatment behind soaking time 10～30min under 496～500 ℃ the condition, and transfer time, coolant water temperature was less than 30 ℃ less than 30 seconds; Six, with the sheet material press polish aligning after the step 5 processing, the cold deformation rate is 80%, promptly obtains high damage tolerance type 2 E 12 aluminium alloy plate.
2. the making method of high damage tolerance type 2 E 12 aluminium alloy plate according to claim 1 is characterized in that the aluminium ingot in the step 1 is that 99.99% fine aluminium ingot and 20～40 parts aluminium alloy cast ingot are formed according to ratio of weight and number by 50～70 parts purity.
3. the making method of high damage tolerance type 2 E 12 aluminium alloy plate according to claim 1 and 2, the castmethod that it is characterized in that 300 * 500mm slab ingot alloy in the step 1 is: will be to cast under 700～720 ℃ of conditions in casting temp behind the raw material mixed smelting, casting speed is 55～60mm/min, and hydraulic pressure is 0.8～1. 5MPa.
4. the making method of high damage tolerance type 2 E 12 aluminium alloy plate according to claim 1 and 2, the castmethod that it is characterized in that the 440 * 500mm slab ingot alloy in the step 1 is: it is to cast under 695～715 ℃ of conditions that raw material is blended in casting temp, casting speed is 45～50mm/min, and hydraulic pressure is 0.6～1. 0MPa.
5. the making method of high damage tolerance type 2 E 12 aluminium alloy plate according to claim 1 and 2 is characterized in that the blank that thickness is 7～9mm is made in the hot rolling of slab ingot alloy in the step 3.
6. the making method of high damage tolerance type 2 E 12 aluminium alloy plate according to claim 5 is characterized in that start rolling temperature is 380～400 ℃ in the step 3, and finishing temperature is 280～330 ℃.
7. according to the making method of claim 1,2 or 6 described high damage tolerance type 2 E 12 aluminium alloy plates, it is characterized in that in the step 4 blank placed under 320 ℃ of conditions heating 3 hours.
8. the making method of high damage tolerance type 2 E 12 aluminium alloy plate according to claim 7 is come out of the stove after it is characterized in that cooling to 250 ℃ in the step 4 with the furnace.
9. according to the making method of claim 1,2,6 or 8 described high damage tolerance type 2 E 12 aluminium alloy plates, it is characterized in that sheet material carries out solution treatment in the step 5 behind soaking time 20min under 498 ℃ the condition.
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| CN101967615B (en) * | 2010-10-27 | 2012-06-27 | 中国航空工业集团公司北京航空材料研究院 | Method for improving damage-tolerance property of 2,000-type aluminium alloy plate material |
| CN103484738A (en) * | 2013-08-12 | 2014-01-01 | 安徽盛达前亮铝业有限公司 | Production technique of high-damage-resistance aluminum alloy plate |
| CN104451296A (en) * | 2014-12-15 | 2015-03-25 | 西南铝业（集团）有限责任公司 | Method for manufacturing 2-series aluminum alloy |
| CN104451297A (en) * | 2014-12-30 | 2015-03-25 | 辽宁忠旺集团有限公司 | Casting technology of aluminum bronze series aluminum alloy circular ingots |
| CN106609329B (en) * | 2015-10-12 | 2018-06-26 | 中国航空工业集团公司北京航空材料研究院 | A kind of damnification resistant aluminum alloy and preparation method thereof |
| CN105441838B (en) * | 2015-11-24 | 2017-08-11 | 苏州有色金属研究院有限公司 | Improve the heat treatment method of 2 ××× T3 plate fatigue crack growth rates |
| CN105803280B (en) * | 2016-04-25 | 2018-07-20 | 山东南山铝业股份有限公司 | A kind of resistant to damage tolerance high strength alumin ium alloy plank and preparation method thereof |
| CN108977700B (en) * | 2018-08-20 | 2020-04-17 | 广东润盛科技材料有限公司 | Aluminum alloy plate and preparation method thereof |
| 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 |
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