TWI238201B - Architectural aluminum alloy material and process for manufacturing the same - Google Patents

Abstract

There is provided an architectural Al alloy material which undergoes minor loss of proof stress even after a baking finish treatment at a high temperature of 260 to 280 DEG C. and which can be subjected to acute-angle bending, as well as, a process for manufacturing the same. This architectural Al alloy material, which is a hot rolled JIS A3003 material, contains a fiber structure and a recrystallized grain structure having an area ratio of 20% or less after a baking finish treatment at 300 DEG C. or lower, and undergoes a proof stress loss of 10% or less after the baking finish treatment. The Al alloy material is manufactured only by hot rolling which is carried out under control such that the temperature at the end of rolling be in the range of 290 to 340 DEG C.

Description

Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Xiao Gong Consumer Cooperative, 1238201 A 7 _B7 ----------_ V. Description of the Invention (彳) ~ ^ '[Technical Field to which the Invention belongs] The present invention relates to a building The Ming alloy material and the suitable manufacturing method are further detailed. The invention relates to a Ming alloy which is subjected to baking treatment in a high temperature region of 2 60 to 280 to: and is actually used as a building material. Material, and even before and after the baking treatment, its resistance decreases little, and its elongation can be fully maintained. It belongs to a flexible aluminum alloy material for construction and its manufacturing method. [Advanced technology] Light-weight samarium alloy materials are used for exterior wall materials, interior decoration materials, and curtain wall materials in high-rise buildings. At this time, for example, as shown in FIG. 1, the aluminum alloy sheet 1 is bent to 9CT. Recently, as shown in FIG. 2, the sheet material is bent to more than 90 degrees. The above acute angles have an increasing trend. Next, in this bending process, it is required to sharpen the bent portion 2 to improve creativity. As an example, as shown in Fig. 3 ', a method is shown in which the aluminum alloy material 1 is bent after the notch 3 is introduced. Then 'before performing the above-mentioned bending process, a coating such as a fluororesin coating, an acrylic resin coating, or a urethane resin coating is baked on an aluminum alloy material at a certain temperature, so as to improve creativity and resistance. Corrosive measures. The aluminum alloy materials used in construction in this state are required to have the following functions. First, from the perspective of building materials, even after construction (please read the precautions on the back before filling this page)

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* 1T This paper size is in accordance with Chinese National Standard (CNS) A4 (210X 291 mm) 4 1238201 B7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (2) Only with proper strength characteristics. Specifically, for example, in the case of an exterior wall material for a building ', it is required to have a resistance of 95 N / n] m2 even after construction. At the same time, in order to have a suitable extension characteristic, it can be smoothly bent and processed, and the bent portion needs to be formed into a sharp shape. In the past, the aluminum alloy materials for construction emphasized the strength characteristics, and used A3004-H24 material (3004-H24 specified in ASTM B209) and A3004-H32 material (3004-H32 specified in ASTM B209). Waiting ○ is that when manufacturing these materials, first, an aluminum alloy material of a predetermined specification is dissolved, and then the ingot is manufactured. Then, the ingot is subjected to a uniform heat treatment by heating for a predetermined time at a predetermined temperature, and then hot-rolled at a predetermined processing rate. During the hot rolling process, the cast structure (solidified structure) of the ingot is pushed and stretched in the direction of rolling and transformed into a fibrous structure. After that, “cold rolling is performed to deal with the miniaturization and thickness adjustment of the crystal particle diameter.” Then, the annealing process is used to remove the processing strain, and then the cold rolling is applied again, and then a heat treatment is performed to remove the processing strain at that time. use. In addition, in the above-mentioned series of manufacturing processes, rolling strain is accumulated in the rolling material at the end point of hot rolling processing and cold rolling processing. Next, when the rolled material is heated to a temperature higher than the recrystallization temperature, the processing strain energy is used as a starting point to form a structure to grow the recrystallized particles. Any of the above materials such as 3 0 0 4-Η 2 4 materials One type is cold rolling (please read the precautions on the back before filling in this page), 11 paper sizes are applicable to China National Standard (CNS) A4 specifications (210 × 297 male f) -5-1238201 A7 _ B7 Ministry of Economy Wisdom Printed by the W Production Bureau employee consumer cooperative V. Description of the invention (3) The material used is' fine recrystallized particles, and still has fibrous structure, which can be bent and sharpened 90. When bent to process 9 (T or more When a crack occurs in a bent portion after an acute angle, the portion needs to be welded and repaired. [Problems to be Solved by the Invention] The object of the present invention is to provide a method for use as a building material and on the premise of baking paint treatment. The aluminum alloy material has a very small decrease in endurance even after baking. At the same time, the elongation characteristics are suitable, so even if it is sharply bent or sharply bent, it will not crack. In order to achieve the above object, the present invention provides a hot-rolled material that conforms to A3003 (ASTM B209 3003) specified by π s, and the temperature is 300 t; the following baking paint treatment The subsequent structure is composed of a fibrous structure and a recrystallized particle structure having an area ratio of 20% or less, and the reduction rate of the endurance before and after the aforementioned baking treatment is controlled to 10% or less, which is a characteristic aluminum alloy material for construction. At the same time, the present invention provides a homogeneous heat treatment of the a3003 (astm B209 3003) ingot specified in [IS], and then, as long as the temperature at the end of the rolling is between 290 and 3 40 ° C. The hot rolling process can provide a manufacturing method of aluminum alloy materials for construction, which is characterized by practical use. [Means to Solve the Problem] The aluminum alloy material of the present invention is only given to the A 3003 material with good strength characteristics, which will be described later. The conditions of the hot-rolled processing are immediately supplied as actual use. This paper size applies to China National Standards (CNS) Α4 specifications (210X 297 male I) (Read the precautions on the back before filling Page)

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* 1T -6-1238201 Ministry of Economic Affairs wisdom / i ^; printed by employee consumer cooperatives --_______ B7 V. Description of the invention (4) I ~ '-I' materials. In other words, unlike the case of traditional aluminum alloy materials, it is manufactured after cold rolling, intermediate annealing, cold rolling, and heat treatment after hot rolling. Specifically, it is manufactured as follows. First, after dissolving the A3003 material of the prescribed composition, it is made into a prayer block. Next, this ingot is subjected to a uniform heat treatment and then subjected to a hot rolling process. The homojunction heat treatment 'is preferably performed in the temperature range of 500 to 63CTC for about 1 to 15 hours. If the processing temperature is lower than 50 ° C, for example, the production amount of intermetallic compounds mainly composed of aluminum and manganese will decrease, and the recrystallized particles grown from the cast structure (solidified structure) will become coarser. Reduced bending workability or poor appearance. At the same time, when the processing temperature is higher than 630 ° C, the ingot is deformed or expanded, which results in the occurrence of structural defects during the post-process (hot rolling). The processing temperature range is 600 to 630 ° C. At the same time, when the processing time is less than 1 hour, the entire ingot cannot be uniformly heated, which makes it difficult to obtain a hot rolling process with a uniform material. In addition, even when processing A long time of more than 15 hours will saturate the uniform thermal effect, which will only cause the waste of thermal energy and is not conducive to cost. The best processing time is in the range of 2 to 6 hours. Then, immediately after being hot-rolled, the cast ingot was transformed into a fibrous structure, and it also grew into a fine secondary grain. The A 3003 material is after the above hot rolling, even if it is supplied as a construction material for actual use. Therefore, when it is supplied for actual use, the paper standard applies to the Chinese National Standard (CMS) A4 specification (2iOX 297 ^ f *) '-7- (Please read the notes on the back before filling this page)

1T surface 1238201 Α7 _ Β7 Ministry of Economic Affairs, Intellectual Property Bureau, Employee Consumption Cooperative, Printing Disaster V. At the time of the invention description (5), the organization of this hot rolled material A 3003 is based on the fiber formed by rolling processing The structure is the main body, and a predetermined amount of fine secondary structure is dispersed. Since this A 3003 material is formed as described above, the following effects can be exhibited. For example, in the case of acute-angle bending processing, when the structure is only a fibrous structure, cracks may occur along the particle interface of the fibrous structure at the bent portion. However, because the fine secondary structure also coexists in this material, the occurrence of the aforementioned cracks can be suppressed. In other words, the formation can be bent at an acute angle. At the same time, when using this A 3 0 0 3 material, even the temperature is 300. (: The following 'specifically, even in the high-temperature area baking paint treatment at a temperature of 260 to 28 CTC', and after the baking paint treatment, the formation of the endurance reduction rate of the A 3 0 0 3 material reaches 10% or less. Then, even if After the baking treatment, the absolute strength of the endurance can be ensured above 95N / mm2, which can meet the necessary conditions for the exterior wall material of the building. At the same time, the elongation is also above 27%, which can obtain good bending processing. Among the above characteristics, the rate of decrease in endurance before and after lacquer treatment can be 10% or less. 'This is the effect obtained by the aforementioned fine secondary structure and fibrous structure for a total of 7 children. Of course,' this secondary structure is at high temperature. During the baking process in the area, it will grow into recrystallized particles, which will increase the particle diameter and increase the amount of precipitation. However, when the A 3003 material of the present invention is used, even after the baking process in the high temperature area, this is repeated. The amount of crystalline particle structure is the size of the whole paper. The paper size applies the Chinese National Standard (CNS) A4 specification (210X29 ^^ 7 ~ a ~ ---- (Please read the precautions on the back before filling in this }

Equipment, 1T 0. -8- 1238201 A7 B7 V. Description of the invention (6) Occupied area ratio is less than 20%, and the rest is controlled to fibrous structure. 'The reason is that the rate of endurance reduction before and after the baking paint treatment becomes 10% or less. (Please read the note on the back before filling in this page.) This characteristic can be achieved by controlling the material temperature at the end of rolling to 290 to 300 ° C in the hot rolling process described above. If the temperature at the end of the rolling is higher than 340 ° C, the elongation will reach about 35%, but the structure will almost become a recrystallized particle structure. For this reason, wrinkles may occur in the bent portion during the bending process. At the same time, when the temperature at the end of rolling is less than 290 ° C, the amount of the aforementioned fine secondary structure will be reduced, and the elongation will be less than 27%, which will cause cracks during sharp bending. In order to control the temperature at the end of rolling to 290 to 340 ° C, in the present invention, the temperature at the start of rolling is set to 350 to 450 ° C. When this temperature is lower than 350 ° C, the temperature at the end of rolling cannot be guaranteed above 29 0 ° C. Due to its high strength and low elongation, cracks and the like occur during bending. Printed by the Ministry of Economic Affairs ^ Finance / 1 Bureau staff boneless cooperative. In addition, if it is higher than 45 (TC, the temperature at the end of rolling is not easy to be below 340 ° C, and the structure at the end of rolling becomes The coarse recrystallized particle structure is the main body, and ridges will occur in the bent portion during the bending process. Then, the endurance will be less than 95 N / mm2. [Embodiments of the invention] In the examples 1 to 16, comparison Examples 1 to 9 are explained. (1) Aluminum alloy material The paper size is in accordance with Chinese National Standard (CNS) 8-4 specification (21〇χ2ϋ: ^ · -9-1238201 _ B7 V. Description of the invention (7) Dissolve the following After the aluminum alloy material, it is manufactured into an ingot (thickness of 500mm) 〇 (Please read the precautions on the back before filling in this page) A3003 material composition is: Si0.58 mass%, Fe0.68 mass%, (: 11. 18% by mass,] \ 4111.48% by mass,% 20.02% by mass, 211.09% by mass, and the remainder is aluminum and unavoidable impurities. (2) Manufacture of plate materials Manufactured by a method with the following conditions The plate thickness is shown in Table 1. Method (A) of the present invention: uniform heat at a temperature of 600 ° C After the ingot was heat-treated for 6 hours, the temperature at the start of rolling was set to 550 ° C, and the temperature at the end of rolling was hot-rolled under the temperature management of the temperature shown in Table 1. This is used as a sheet material. Conventional method (B) ... After the ingot is heat-treated in a uniform heating furnace at a temperature of 600 ° C for 6 hours, the temperature at the start of rolling is 5 50 ° C, and the rolling At the end of the production process, hot rolling was performed at a temperature of 3 1 0 ° C ° C, followed by cold rolling at 80 ° C. Then, an intermediate annealing treatment was performed at a temperature of 3 60 ° C for 3 hours, and then further 8 0 After cold rolling at ° C, heat treatment was performed at 230 ° C for 3 hours. After that, it was used as a board material. (3) Measurement of characteristics The endurance (Γ.) And elongation of various board materials are not applicable to the Chinese National Standard (CMS) A4 standard (210X 19 * 7 mm) -10- 1238201 A7 B7 Poor cooperatives printed five. Description of invention (8) Next, apply fluorine resin coating to each board material, and proceed as shown in Table 1. After the paint is supplied at different temperatures, the endurance (F) and elongation at this time are measured. Calculate 100 X (Γ.-Γ) / (Γ.) As the rate of decrease in endurance (%) before and after the baking paint treatment. The results are shown in Table 1. Area ratio of recrystallized particle structure: The crystalline structure was observed by the Barker method. Specifically, after the surface of each plate material was planed, the processed surface was electrolytically honed, and After the honing surface was etched with HBF4 liquid, the area of each recrystallized particle structure was accumulated using polarized image processing. Next, the ratio (percentage) of the cumulative chirp in the visible range (5 m m × 5 m m) is obtained. The results are shown in Table 1. Meanwhile, with respect to the plate materials of Example 9 and Comparative Example 8, microscopic photographs (magnification X50) of their structures are shown in Fig. 4 and Fig. 5, respectively. (4) Bending test After bending processing of each plate material after each baking paint treatment, visually inspect the presence of wrinkles (peeling of baking paint) and cracks in the bent portion. The wrinkles are divided into a direction perpendicular to the rolling direction 4 (the longitudinal direction of the sheet material) as shown in FIG. 6 and a direction parallel to the rolling direction 4 (the sheet material and the width direction) as shown in FIG. 7. The direction is performed in two ways to find the bending angle when viewing wrinkles. At the same time, as for the cracks, as shown in Fig. 7, the direction parallel to the rolling direction (the width direction of the plate material) is bent into 90 ° and bent (please read the precautions on the back before filling this page).

The paper size of this paper is suitable. Ϊ́ 家 standard (CNS) A4 size (2). -11-1238201 A7 _ B7 V. Description of the invention (9) After processing to 180 ° for processing, check for cracks. occur. Mark 0 when there are no cracks, mark △ if there is a slight crack but it will not cause a problem in practical use, and mark X when a significant crack occurs. (Please read the precautions on the back before filling out this page) Employees of Xihui Property Bureau of the Ministry of Economic Affairs print the rules for the cooperatives | 厘 2 1238201 Λ 7 Β7 V. Description of the invention Cooperative prints Bending I-type bursting test 180 ° C < 3 < 1 < 1 < 〇〇〇〇〇〇〇〇〇〇〇〇〇 < 〇XUU 〇 0 UXXX Bend 90 ° C 〇〇〇 〇〇〇〇〇〇〇〇〇〇 〇〇〇〇〇〇〇〇〇〇〇〇XX <] Wrinkles and rolling direction is parallel to the direction r— * · r.—I r · < f 丨 丨 'ι Ί t— < f < r— «· τ · _—« " 11 < »1 < τ1 f < r_—« * — & 〇〇〇〇〇〇〇〇〇〇〇〇 CO " 'χ}-τ ~ * (' ― ™ * r ~~ tf 丨 一 < f—ί I— i \ < ψ — t < »—- < 1 1 f — it? Tibetan paste s _ i_l« z «1 i > > · ί, 〆« ί tijz · λ..ι production «11 'vUx t_i 1 /» vij / · \ JJ 〆i_Ll〆ί \ A ^ \ \ ffl; ffl: ffl: ffl: Miao: Miao Ertan Tantan Tantan :: ffl: ffl: Tan Tantan Tan Tan Eryuan Er Tan Er * τΗ · > 'τΗν ^ γΗ, * τΗ · ν' τΗ'ν * τΗν * τΗν '^ γΜ, ^ rfi, UJ ^ OOOOOOOO 〇〇〇〇〇— inch inch inch inch' ", r—Η Γ— ^ r— ^ r—H »— < r— ^» — < * — ♦ Baking paint processing endurance reduction rate (%) ^ C〇r ^ _〇CC〇CO ^ 〇 MD < > J 〇OC7NaNr ^ CD v— (t— * ί ~ '1.2 31.5 26.4 5.7 1.1 2.1 10.7 28.9 65.8 S g SI £ W tt rf ^ OOOOOOOOOOOOO ^ o ^ O 〇sss§§§§§ After painting) Elongation (%) ^ oiooqo'O ^ fOcor ^ r ^ c ^ i ^ r ^ ooo ^^ cKcKcKoo ^ r ^ cNC'i 〇lCN〇l (NCNoi < N < N〇J〇) corocomcnm Ο- ί \ 〇r— (t—tt—i CO 1 · oS od inch · inch 'inch · uS oi cn c ^ i cn cn cn ^ r < i endurance (N / min2) \ 〇i ~ * 〇〇v 〇unc〇CN inch CN — O inch inch inch 0 ^ 0〇0030 ^ 0 < 10 < 10 ^. ] ≪: ^ 一 — 〇〇 《y— ^ < ___ · Η > — «4 f lit — * i—4 ψ " 1” _ 一 _ — Product 1 > f——4 f __ 1 ψ 1 ^ Baking paint temperature ro 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 ○ ○ ○ 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 0]] 〇οι cn 〇3 cn 〇] N m 〇〇 < NN cq ooooooooo V〇inch inch V〇〇〇〇〇〇V〇 inch ο τ < ~ ιcn 〇〇 '~~ > 〇J. ≫ 〇) m Manufacturing characteristics of the material (before baking) Elongation (%) 26.5 26.5 26.5 26.5 28.5 28.6 28.8 28.5 28.6 28.8 28.6 30.4 30.4 31.0 31.2 31.0 19.8 28.6 31.0 33.3 34.1 34.1 8.8 8.8 8.8 Endurance (N / mm2) v〇r -Inch m ^ inch c *. Inch inch inch υη inch un inch inch ~~ ι— ο ο 〇T—H 1— «r—H r · — r—H t < r—H, n * r-< ι * π it < f— <, • 丨 — v 1 · f1,1,1 < g 3 s £ s S gg «s '? ® I, vr *', l / ·) 〇〇W, 〇 O vy) 〇〇〇iy ^ uo 〇 〇〇 ———— "vrS 1 · 1 · Ή 〆 二 〆ur: · cS 'ι / S vc5 cr; pppppoopp m cn rn c ^ \ mc ^ \ c n cn Temperature (° C) at the end of the temptation 〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇 C7 > ^ ^ 1 CO i " * ^ ·, '^} · r ^ 4 〇3 cn cn co m cn rn cn rn m cn cn cn m ooooooooo ί—i CO ί—1 H »— ♦ cn cn cn m 〇〇cn m Types of manufacturing methods < < < < < < < < < < < < < < < < < < < < P3PQPQPQCQ The type of Taiwan gold co r. cn cn m cn cn mm cn ro < r * tc ^ j co c ^ > 〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇oooooooooooooooooo ro c ^ i cn ro γ * ^ ι cn c ^ imm cn mm ^ rn cm < < < < < < < < < < < < < < < < A3003 A3003 A3003 A3003 A3003 A3003 A3004 A3004 A3004 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Example U Example Γ 2 Example Π Example M Example 15 Example 16-'cn * · 〇o r- go 〇- \ Kuang Kuang Kuang s Kuang Kuang s Kuangs (Please read the precautions on the back before filling in this page) • Packing --- The size of this paper applies the Chinese National Standard (CNS) A4 specification (210 > < 297 mm) -13- 1238201 A7 B7 V. Description of the invention (d [Effect of the invention] The following results can be understood from Table 1. (Please read the precautions on the back before filling this page) ( 1) It is clear from Comparative Example 9 and Comparative Example 6 that even if the materials are the same, the temperature at the end of rolling is the same and the plate thickness is the same. After hot rolling, cold rolling or intermediate annealing is followed. In the case of Comparative Example 6, even if the baking temperature is 260 ° C, the endurance after baking is less than 9 5 N / m m2 compared with Example 9. Then, even in the bending test, it is better than the implementation. It is easy to wrinkle in Example 9. This is because the structure of Comparative Example 6 is a series of processes after hot rolling, and further, it forms a recrystallized particle structure during baking paint treatment. It can be seen that even if baking paint treatment is used, The effectiveness of the production method of the present invention can be clarified by hot rolling under conditions that prevent the growth of the recrystallized particle structure. (2) The fibrous structure of the microstructure-based fibrous structure after the lacquer treatment of Example 9 shown in FIG. Sub grains are mixed. Next, the endurance and elongation after baking treatment are 122N / mm2 and 29.5%, respectively, and the decrease rate of endurance is 1.6% is very low. Wow. Lang Zhi & Cai / -1 Bureau Xiaogong 4 ^ Cooperative printed this, it is possible to obtain good results of the bending test. In addition, fibers are not recognized in the structure after the baking treatment in Comparative Example 8 shown in Fig. 5 The existence of an organization that is considered to be gross Tissue recrystallized particles. Next, endurance after baking treatment, although a high number of 160N / mm2 in Zhi, but an elongation of 5.2% is very small, and decreased endurance was 28 · 9% is very large. As a result, wrinkles and cracks in the bending test are further deteriorated. From this point of view, the effectiveness of the construction aluminum alloy material of the present invention having a coexisting fibrous structure and a fine secondary structure is very clear. Or the scale is applicable to the Chinese National Standard (CNS) A4 specification (210.X 297 mm) -14-1238201 ____ B7_ 5. Description of the invention (^ significant. (Please read the notes on the back before filling out this page) From the above description, you can understand clearly that the temperature at the end of rolling is managed at 290 to The hot-rolled material of A3003 material at 340 ° C will not grow and maintain the state of fibrous structure even after baking treatment, and maintain the fiber structure as the main body, and the endurance reduction rate is below 10%. Absolutely no less than 9 5 N / m m2, and elongation will be no less than 27%. Therefore, the aluminum alloy material of the present invention has good bending workability even after baking treatment, and is As a construction material that does not cause a decrease in endurance, its industrial price is very high. In addition, the above description is based on the temperature of baking paint treatment at 260 to 280 ° C. However, the aluminum alloy material for construction of the present invention can also be used for baking paint treatment at a temperature of 260 ° C or lower, and can be effectively used even in the range of 280 to 300 ° C. [Simplified description of the drawing] Section 1 Figure 2 shows a rough figure of the board material being bent to 90 °. Figure 2 shows a rough figure of the board material being bent to be sharp. Figure 3 is showing a notch plate being bent to 9 Figure 4 shows a schematic diagram of a plate material structure in Example 9. Figure 4 is a microscope picture of a plate material structure in Comparative Example 8. Figure 6 shows a plate material in a rolling direction and a rolling direction. It is a rough figure bent in the vertical direction. Figure 7 shows that the IrJ plot display does not point the plate material in parallel with the dairy direction. 1 ** ___________________________________________ This paper applies the Chinese National Standard (CNS) Λ4 specification ( 210X 297 mm) " '--- -15- 1238201 A7 B7 V. Description of the invention (Simplified figure bent in ^ direction. Component comparison table 1 Inscription alloy material 3 notch. (Please read the precautions on the back first) Fill this page Install ---

、 1T Ministry of Economic Affairs Zhisicai / i- Bureau g (printed by industry and consumer cooperation) This paper size is applicable to China National Standard (CNS) Λ4 specification (210 × 297 mm) -16-

Claims (1)

1238201 Sixth, the scope of the patent application is replaced by the patent application No. 901 1 9385. __ | 3 ^^ 1 ^ The scope of the Chinese patent application is amended on July 27, 1993. 1. An aluminum alloy material for construction, which is characterized by: : It is composed of the following conditions: Hot rolled material of ingots of A 3 003 (equivalent to 3003 of ASTM B209) in accordance with the composition specified by JIS; the thickness is 6.0mm or less; the temperature is below 30 ° C The structure after the baking paint treatment is composed of: a fibrous structure and a recrystallized structure having an area ratio of less than 20%, and 'the endurance before the baking paint treatment is more than 104N / mm2, and the baking paint treatment The endurance is 95N / mm2 or more. 2 · If the aluminum alloy material for construction in item 1 of the scope of patent application, the elongation after the above baking treatment is above 27%. 3. For the aluminum alloy materials used in construction as claimed in item 1 or 2 of the patent scope, wherein the temperature during the aforementioned baking treatment is 260 to 28CTC. 4. A manufacturing method of aluminum alloy material for construction, characterized by: The printing of the employee consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is formed by the following conditions: For A3003 that is in compliance with] IS (equivalent to 3003 of ASTM B 209) The ingot is subjected to soaking treatment, and then, as long as the temperature management at the end of rolling is 2 90 to 34 CTC and the thickness is 6 · Omni or less, the ingot can be hot-rolled to provide practical use. The organization after baking paint treatment at a temperature below 300 ° C is based on: This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 public directors) 1238201 A8 B8 C8 D8 System 6. The scope of patent application is composed of fibrous structure and recrystallized structure with an area ratio of less than 20%, and the endurance before the baking treatment is above 104N / mm2, and the endurance after the baking treatment is 95N / mm2 or more. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) -2-