WO2005056859A1 - ベークハード性およびヘム加工性に優れたAl-Mg-Si合金板の製造方法 - Google Patents
ベークハード性およびヘム加工性に優れたAl-Mg-Si合金板の製造方法 Download PDFInfo
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- WO2005056859A1 WO2005056859A1 PCT/JP2004/018581 JP2004018581W WO2005056859A1 WO 2005056859 A1 WO2005056859 A1 WO 2005056859A1 JP 2004018581 W JP2004018581 W JP 2004018581W WO 2005056859 A1 WO2005056859 A1 WO 2005056859A1
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0605—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two belts, e.g. Hazelett-process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
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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
Definitions
- a thin slab is produced by continuous formation of an A-Mg--Si alloy, and after homogenization, cold rolling is performed, and if necessary, solution treatment is performed by a continuous annealing furnace.
- the present invention relates to a method of manufacturing an alloy sheet having high hemmability and high age hardenability, as well as Al-Mg_Si alloy sheet. According to the method, a rolled sheet of an Al_Mg—Si alloy suitable for forming for use in bending, pressing, etc. of automobile parts, home appliances, etc. can be manufactured inexpensively as compared with the prior art.
- a ⁇ Mg-Si based alloys have the property of becoming high in strength when heat is applied in a process such as post-forming coating, and therefore they are suitably used for automobile panels and the like. Furthermore, in order to reduce the cost by improving productivity, it has been proposed to manufacture this plate by continuous rolling and rolling.
- Si 0.4-2.5%
- Mg 0.1-1.2%
- Cu 1.5% or less
- Zn 2.5% or less
- Cr 0.3% or less
- Mn An aluminum alloy melt containing one or more of 0.6% or less and Zr: 0.3% or less is continuously formed on a plate having a thickness of 3 15 mm and then subjected to cold rolling and then solution treatment '
- the aluminum alloy sheet for forming and processing characterized by having a maximum size force of 3 ⁇ 4 ⁇ m or less of the intermetallic compound in the matrix obtained by quenching is disclosed, and a method for producing the same.
- Japanese Patent Application Laid-Open No. 10-110232 contains Si: 0.2-3.0% and Mg: 0.2- 3.0% as essential elements,
- a Mg-Si based alloy sheet is disclosed.
- Si 0.1—2.0%, Mg: 0.1—2.0%, Fe: 0.1—1.5% or less.
- Cu 2% or less, Cr: 0.3% or less, Mn: 1.0% or less, Zr: 0.3% or less, V: 0.3% or less, Ti: 0.03% or less, Zn: 1.5% or less, Ag: 0.2% or less
- An A ⁇ Mg-Si alloy sheet has been proposed.
- Patent Document 1 Japanese Patent Application Laid-Open No. 62-207851
- Patent Document 2 Japanese Patent Application Laid-Open No. 10-110232
- Patent Document 3 Japanese Patent Application Laid-Open No. 2001-262264
- An alloy sheet used as an outer panel, such as a body sheet for an automobile, is required to have excellent workability and beta hardness. Therefore, there is a demand for an A-Mg_Si-based alloy sheet which is excellent in bendability and age-hardened by heating.
- plates manufactured by force continuous rolling and rolling have the disadvantage that they are inferior in hemmability, and furthermore, beta hardness after coating is not sufficient.
- the object of the present invention is to suppress the GP zone which precipitates at the time of natural aging when left at room temperature, to rapidly deposit a strengthening phase at the time of coating-baking heating, to obtain high bake hardening, and at the same time, to be flexible. It is an object of the present invention to provide a forming A ⁇ Mg — Si alloy sheet at low cost.
- a thin slab of A-Mg-Si alloy is continuously formed by a double belt forming machine, and the formed thin slab is directly wound, subjected to homogenization treatment under appropriate conditions, and cold rolled. Thereafter, by combining the solution treatment and the like in the continuous annealing furnace as necessary, the compound can be divided to improve the hemmability and at the same time greatly shorten the process. Furthermore, by suppressing microsegregation by homogenization treatment and increasing the cooling rate after homogenization treatment, precipitation of Mg Si during cooling is suppressed, and beta hardness after final annealing, hemmability
- the present invention for solving the above problems is an aluminum alloy sheet characterized in that after a thin slab is taken up, it is subjected to homogenization treatment, cold rolling and then solution treatment. It relates to the manufacturing method of Specifically, as described in claim 1, Mg: 0.30 to 1.00 wt%, Si: 0.30 to 1.20 wt%, Fe: 0.05 to 0.50 wt%, Mn: 0.05 to 0.50 wt%, and ⁇ : 0.005- An alloy melt containing at least 0.10 wt%, or at least one of Cu: 0.05-0.70 wt%, Zr: 0.05-0.40 wt%, and the balance A1 and unavoidable impurities, is formed into a slab by the double belt structure method.
- the method is a method for producing an aluminum alloy sheet excellent in beta hardness and hemmability, characterized by cold rolling after cooling to at least 250 ° C. or less, and then solution treatment. Described invention).
- the homogenization treatment is performed by raising the temperature to 520-580 ° C. at a heating rate of 30 ° C./h or more by a batch furnace, and holding the temperature for 2 to 24 hours. Is desirable (the invention according to claim 2).
- the solution treatment is preferably performed by heating to 530 to 560 ° C. at a temperature rising rate of 10 ° C./s or more by a continuous annealing furnace, and holding for 30 seconds or less (the invention according to claim 3) .
- cooling to room temperature is performed at a rate of 10 ° C./s or more, and thereafter, the continuous annealing furnace is used to carry out 260-300 ° C. You may perform the restoration process hold
- water cooling is performed to 250 ° C. or less at a cooling rate of 10 ° C./s or more, and thereafter, it is performed by air. It may be cooled to 60-100 ° C. at a cooling rate of 100 ° C./s, coiled up, and subjected to a pre-aging treatment of cooling to room temperature (the invention according to claim 5).
- the solution is cooled to room temperature at a rate of 10 ° C./s or more, and thereafter, at 260 300 ° C. in a continuous annealing furnace. It may be subjected to a reversion treatment to be held for less than 30 seconds, cooled to 60 ° C. to 100 ° C. at a cooling rate of 1 ° C./s or more, subjected to core aging, and subjected to pre-aging treatment to be cooled to room temperature. Described invention). Effect of the invention
- an aluminum alloy sheet of the present invention beta hardness and heme are obtained.
- An aluminum alloy sheet excellent in workability can be obtained.
- an aluminum alloy sheet can be obtained at a low cost which is extremely short in process.
- the present invention relates to a method for producing a rolled sheet of an Al-Mg_Si alloy, and a thin slab is fabricated by a double belt structure method, and then directly wound into a coil and subjected to a homogenization treatment After that, it is characterized by cold rolling and further solution treatment.
- a molten alloy having the above-described composition is formed into a slab having a thickness of 5 to 15 mm at a cooling rate of 40 to 150 ° C./s at a 1/4 thickness of slab by a double belt structure method. After coiling, apply homogenization treatment and cool to at least 250 ° C or less at a cooling rate of 500 ° C / hr or more, and then perform cold rolling and then solution treatment.
- the double belt construction method is a method in which molten metal is poured between rotating belts which are vertically opposed and water cooled, and the molten metal is solidified by cooling from the belt surface to form a thin slab.
- a 5 to 15 mm thick slab is fabricated by the double belt construction method. If the slab thickness exceeds 15 mm, it will be difficult to coil the thin slab into a coil, and if the slab thickness is less than 5 mm, productivity will decrease and it will be difficult to form the thin slab. .
- the cooling rate is less than 40 ° C./s, the microstructure formed at the time of solidification in the slab core becomes rough and causes heme processability to decrease, and if the cooling rate force exceeds Sl 50 ° C./s, A ⁇ Fe — Si crystals Product, AHFe'Mn) -Si crystallizing force Size of less than ⁇ m, coarser recrystallized grain size of more than 30 ⁇ m.
- the coil After removing a thin slab, the coil is subjected to homogenization treatment under appropriate conditions to adversely affect the heme processability.
- A-Fe-Si crystallized product, AHFe'Mn) -Si crystal The product can be fragmented to improve hemmability. Furthermore, it is possible to obtain a thin slab in a state in which the relatively fine Mg Si crystallized product remaining in the textured structure is completely dissolved in the matrix,
- the effect of the solution treatment after the cold rolling process can be improved.
- Cooling after the homogenization treatment is cooled to at least 250 ° C. or less at a rate of 500 ° C./hr or more The reason is that the precipitation of relatively coarse Mg Si is suppressed as much as possible, and these Mg and Si are supersaturated.
- the coil is inserted into a batch furnace and heated to 520-580 ° C. at a heating rate of 30 ° C./h or more, and maintained at that temperature for 2 to 24 hours Apply homogenization, then remove the coil from the batch furnace and force air cooling to room temperature at a cooling rate of 500 ° C / hr or more.
- the cooling can be performed by, for example, a fan while loosening the coil.
- the reason for limiting the temperature rising rate up to the homogenization temperature to 30 ° C./h or more in the homogenization treatment after thin slab thinning is the predetermined temperature rise rate less than 30 ° C./h. Because it takes more than 16 hours to reach the homogenization temperature, the cost is high.
- a ⁇ Fe_Si crystallized product, AHFe 'Mn) -Si crystallized product is not sufficiently divided, and it is not enough to solidify Mg Si crystallized at the time of forming into the matrix. Temperature exceeding 580 ° C. In the case of
- the reason why the homogenization treatment time is in the range of 2 to 24 hours is that in the case of the treatment time of less than 2 hours, A ⁇ Fe-Si crystallized material, Al- (Fe ′ Mn) _Si crystallized material Is not sufficiently divided, and it is not sufficient to cause Mg Si crystallized at the time of structuring to form a solid solution in the matrix.
- the coil is further cold-rolled and subjected to solution treatment.
- the solution treatment is preferably carried out usually in a continuous annealing furnace (CAL).
- a continuous annealing furnace is a facility for continuously solutionizing a coil, and includes an induction heating device for heat treatment, a water tank for water cooling, and an alpha nozzle for air cooling, etc. It is characterized by being equipped with
- the solution treatment it is preferable to heat to 530 560 ° C. at a temperature rising rate of 10 ° C./s or more in a continuous annealing furnace, and hold for 30 seconds or less.
- the heating rate up to the solution treatment temperature is limited to 10 ° C./s or more.
- the reason for the heating rate less than 10 ° C./s is that the coil feed rate is extremely high. It's too late, As a result, the processing time becomes long and the cost becomes high.
- the reason for setting the solution treatment temperature in the range of 530-560 ° C. is that if the temperature is less than 530 ° C., Mg Si precipitated during crystallization or during cooling after homogenization treatment is solidified in the matrix Dissolve
- the low melting point metal melts and causes burring.
- the reason for limiting the solution treatment time to 30 seconds or less is that, in the case of the treatment time exceeding 30 seconds, Mg Si precipitated during crystallization or cooling after homogenization treatment is sufficiently present in the matrix
- cooling to room temperature is performed at a rate of 10 ° C./s or more.
- the reason for setting the cooling rate after solution treatment to 10 ° C / s or more is that if the cooling rate is less than 10 ° C / s, Si precipitates at grain boundaries during the cooling step, resulting in hem processability. It is for degrading.
- the thin slab After subjecting the thin slab to the above-mentioned homogenization treatment, it is further cold-rolled, solution treated, cooled to room temperature at a rate of 10 ° C./s or more, and the coil is left at room temperature After holding for 30 seconds at 260 to 300 ° C. in a continuous annealing furnace, cooling may be performed at 10 ° C./s to room temperature.
- the solution treatment and reconstitution treatment is preferably carried out usually in a continuous annealing furnace (CAL).
- a continuous annealing furnace (CAL) is a facility for continuously solutionizing the coils, and includes an induction heating device for heat treatment, a water tank for water cooling, an air nozzle for air cooling, and the like. It is characterized by By this restoration treatment, it is possible to re-dissolve the GP zone which is naturally aged and precipitated in the room temperature after solution treatment, and to obtain sufficient strength after coating and baking.
- restoration treatment is performed at 260 ° C. 300 ° C.
- the restoration temperature is less than 260 ° C., sufficient beta hardness can not be obtained, and when it exceeds 300 ° C., heme processability is deteriorated.
- the reason for limiting the holding time to the reversion temperature to 30 seconds or less is that if the treatment time is longer than 30 seconds, the GP zone in which natural aging and precipitation occur due to shrinkage at room temperature after solution treatment is sufficient. In addition to being able to form a solid solution, the feed rate of the coil becomes too slow, resulting in an increase in processing time and cost.
- the thin slab After the thin slab is subjected to the above-mentioned homogenization treatment, it is further cold-rolled and subjected to solution treatment in a continuous annealing furnace to obtain a cooling rate of 10 ° C / s or more (first cooling rate Water cooling to below 250 ° C, then cooling with air at a cooling rate of 120 ° C / s (second cooling rate) to 60-100 ° C, coiling up, and cooling to room temperature. You can also.
- This solution treatment and the subsequent cooling are generally preferably carried out in a continuous annealing furnace (CAL).
- CAL continuous annealing furnace
- heat treatment pre-aging
- pre-aging could be carried out to uniformly form nuclei for precipitation in the matrix, and sufficient strength could be obtained after coating and baking.
- the solution treatment and the subsequent cooling, recovery treatment and subsequent cooling are preferably carried out usually in a continuous annealing furnace (CAL).
- CAL continuous annealing furnace
- heat treatment is carried out to form nuclei for precipitation of soot during cooling after recovery processing if GP zones that can undergo natural aging precipitation when allowed to stand at room temperature after solution treatment can be dissolved again.
- Pre-aging can be performed, and the resistance to coating after baking can be further improved.
- the essential element Mg is in solid solution in the matrix after solution treatment, and it precipitates as a strengthening phase together with Si during coating baking and heating to improve strength.
- the addition amount thereof is limited to Mg: 0.30 to 1.00 wt% because the effect is small at less than 0.30 wt% because the heme processability after solution treatment is reduced if it exceeds 1.00 wt%.
- a further preferable range of the Mg content is 0.30 to 0.70 wt%.
- Si which is an essential element, is an intermediate between Mg and Si, which is referred to as ⁇ together with Mg when baking paint and baking.
- the content is limited to Si: 0.30 to 1.20 wt% because the effect is small at less than 0.30 wt% and the hemmability after solution treatment is reduced if it exceeds 1.20 wt%. More desirable range of Si content The range is 0.60 to 1.20 wt%.
- Fe which is an essential element, generates many A-Fe-Si crystals and AHFe 'Mn) _Si crystals having a size of 5 ⁇ m or less at the time of microstructure.
- the Fe content is less than 0.05 wt%, the effect is not remarkable.
- it exceeds 0.50 wt% coarse A ⁇ Fe_Si crystallized product and A ⁇ (Fe ⁇ Mn) -Si crystallized product are formed at the time of forming, and the heme processability is lowered. Lower the beta hardness of the final board. Therefore, the preferable range of Fe content is 0.05 to 0.50 wt%.
- a further preferable range of Fe content is 0.05 to 0.30 wt%.
- Mn which is an essential element, is added as an element to refine recrystallized grains.
- the size of recrystallized grains By controlling the size of recrystallized grains to a relatively small size of 10 25 am, it becomes a plate with excellent formability. If the Mn content is less than 0.05 wt%, the effect is sufficient, and if it exceeds 0.50 wt%, coarse A Mn Mn crystallized product, A 1-(Fe ⁇ Mn)-Si crystallized product is formed during slab fabrication and heme
- the beta hardness of the final plate is reduced because the amount of solid solution of Si in the thin slab, which is reduced only by the decrease in formability, is reduced. Therefore, the preferred range of the Mn content is 0.05-
- a further preferable range of the Mn content is 0.05 to 0.30 wt%.
- the preferred range of Ti content is
- a further preferable range of the Ti content is 0.005 0.05 wt%.
- Cu which is an optional element, is an element that promotes age hardening and enhances beta hardness. If the Cu content is less than 0.05 wt%, the effect is small. If the Cu content exceeds 0.70 wt%, the strength of the plate after pre-aging treatment is increased, and the hemmability is not only degraded, but the corrosion resistance is significantly reduced. become. Therefore, the preferable range of the Cu content is 0.05 0.70 wt%. A further preferred range of the Cu content is 0.10 0.60 wt%.
- Zr which is an optional element, is added as an element to refine recrystallized grains.
- Zr content is If the amount is less than 0.05 wt%, the effect is sufficient, but if the amount is more than 0.40 wt%, coarse A ⁇ Zr crystallites are formed at the time of slab fabrication, and the heme processability is reduced. Therefore, the preferable range of the Zr content is 0.05 to 0.40 wt%. A further preferable range of the Zr content is 0.05 to 0.30 wt%.
- the samples after the cold rolling step are not coils but all cut plates. Therefore, in order to simulate the continuous annealing process of the coil by the continuous annealing furnace (CAL), solution treatment and water quenching or 85 ° C. hot water quenching of the sample in a salt bath were adopted.
- CAL continuous annealing furnace
- a slab having a thickness of 7 mm was produced by a double belt construction method.
- the cooling rate of 75 ° C./sec was calculated by measuring DAS (Dendrite Arm Spacing) by cross method from the microstructure observation at a slab thickness of 1/4.
- the slab was subjected to a predetermined homogenization treatment, cooled to room temperature at a predetermined cooling rate, and cold-rolled into a 1 mm thick plate.
- this cold rolled sheet is subjected to solution treatment in a salt bath, 1) hardened by 85 ° C hot water, and immediately inserted into an annealing machine of a predetermined atmosphere temperature and heat treated under a predetermined condition, or 2) After water quenching and leaving at room temperature for 24 hours, heat treatment was performed under predetermined conditions. Furthermore, in order to simulate the car painting process, it was kept at room temperature for 1 week after heat treatment, 0.2% caustic resistance was measured, and 0.2% caustic resistance was also treated with beta treatment of 180 ° CX for 30 minutes. Was measured.
- the difference in proof stress between before and after beta treatment was regarded as beta-hardening, and those exceeding 80 MPa were judged to be excellent in beta-hardening.
- the plate before beta treatment is given a 5% pre-strain to simulate hemming, and after bending in a U-shape with a jig of r: 0.5 mm, a 1 mm thick sheet Then, insert a 180 ° bend. Those with no cracking were marked ⁇ , those with cracking X.
- Table 2-6 Detailed production process and evaluation results are shown in Table 2-6.
- Cloth 1 base composition (t (t% )
- Table 2 shows the results when the homogenization treatment conditions and the cooling rate after the homogenization treatment were changed.
- the slab after homogenization treatment is cold rolled to a plate thickness of 1 mm, and this cold rolled plate is solution-treated by holding it at a predetermined temperature for 15 seconds in a salt bath and then quenched by 85 ° C hot water, immediately at 85 ° C. It was inserted into the burner at ambient temperature and pre-aged for 8 hours.
- Those falling within the condition range of the present invention (1_7) have excellent beta hardness and heme processability. Without homogenization, both beta-hard and heme processability are poor (8, 10). In addition, if the cooling rate after homogenization is slow, beta hardness is poor (9).
- Table 3 shows the results of changing the temperature / time of the homogenization treatment.
- the homogenized slab is cold rolled to a thickness of 1 mm, and this cold rolled sheet is placed in a salt bath at a specified temperature for 15 seconds.
- hot water hardening was carried out at 85 ° C., and immediately inserted into an 85 ° C. atmosphere temperature burner to carry out pre-aging for 8 hours.
- Those falling within the condition range of the present invention (11- 14) have excellent beta hardness and heme processability.
- both beta hardness and hemmability are inferior.
- Table 4 shows the results when the homogenization treatment conditions and the restoration treatment conditions are changed.
- the slab after homogenization treatment is cold rolled to a plate thickness of 1 mm, and this cold-rolled plate is specified by a salt bath. After solution treatment at temperature for 15 seconds, it was water-quenched, allowed to stand at room temperature for 24 hours, and held at predetermined temperature for 15 seconds to perform restoration treatment.
- Those falling within the condition range of the present invention (17-20) have excellent beta hardness and heme processability. If the restoration temperature (reheating temperature) is low (21), beta hardness is poor. Hem processability is poor if the recovery treatment temperature (reheating temperature) is too high (22). Furthermore, even if the conditions for restoration fall within the scope of the invention, the hemmability is inferior when the homogenization temperature is low (23) or when the holding time is short (24). If the cooling rate after homogenization is slow, beta hardness is poor (25).
- Table 5 shows the results when the homogenization treatment conditions and the cooling pattern after solution treatment were changed. It is the result.
- the cooling rate after the solution treatment is divided into two stages, and the cooling rate from the solution treatment temperature to the intermediate temperature is defined as the first cooling rate, and the cooling rate from the intermediate temperature to the coil-up temperature is the second cooling rate. It was defined as speed.
- the slab is cold-rolled to a thickness of 1 mm, and this cold-rolled sheet is subjected to solution treatment held at a predetermined temperature for 15 seconds in a salt bath and then cooled to an intermediate temperature at a first cooling rate. Then, it was cooled to the coil-up temperature at the second cooling rate and then cooled to room temperature at 5 ° C./hr.
- Those falling within the condition range of the present invention have excellent beta hardness and heme processability.
- the first cooling rate after solution treatment is slow (29), the second cooling rate is slow (31), or the intermediate temperature is too high (30), the hemmability is poor.
- the coil up temperature is too low (32), beta hardness is poor.
- the homogenization temperature is too low (34), or if the holding time is too short (35), hemmability is poor.
- beta-hardness decreases (36).
- twin belts 7 30 560 5 1500 1 side 550 100 200 20 20 110 1/210 101 o invention 27 B double belt side 50 560 6 2000 1 mm 550 100 200 20 70 105/207 102 o
- Table 6 shows the results when the reconstitution temperature (reheating temperature) after the solution treatment and the coil up temperature were changed.
- the homogenized slab is cold-rolled to a thickness of 1 mm, and this cold-rolled plate is subjected to solution treatment with a hold at a predetermined temperature for 15 seconds in a salt bath, then water hardening and left at room temperature for 24 hours. Thereafter, the film was held at a predetermined temperature (reheating temperature) for 15 seconds, cooled to a predetermined coil-up temperature at 10 ° C./s 2, and further cooled to room temperature at 10 ° C./hr.
- Those that fall within the condition range of the present invention (37- 40) have excellent beta hardness and hemmability.
- Equalization treatment 550 ° C 6h
- Cooling rate after homogenization treatment 1000 ° C / h Industrial applicability
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Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP04806942A EP1702995A1 (en) | 2003-12-11 | 2004-12-13 | METHOD FOR PRODUCING Al-Mg-Si ALLOY EXCELLENT IN BAKE-HARDENABILITY AND HEMMABILITY |
US10/582,272 US20070209739A1 (en) | 2003-12-11 | 2004-12-13 | Method for producing Al-Mg-Si alloy sheet excellent in bake-hardenability and hemmability |
JP2005516219A JP4577218B2 (ja) | 2003-12-11 | 2004-12-13 | ベークハード性およびヘム加工性に優れたAl−Mg−Si合金板の製造方法 |
CA002548788A CA2548788A1 (en) | 2003-12-11 | 2004-12-13 | Method for producing al-mg-si alloy excellent in bake-hardenability and hemmability |
Applications Claiming Priority (2)
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JP2003413885 | 2003-12-11 | ||
JP2003-413885 | 2003-12-11 |
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WO2005056859A1 true WO2005056859A1 (ja) | 2005-06-23 |
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PCT/JP2004/018581 WO2005056859A1 (ja) | 2003-12-11 | 2004-12-13 | ベークハード性およびヘム加工性に優れたAl-Mg-Si合金板の製造方法 |
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US (1) | US20070209739A1 (ja) |
EP (1) | EP1702995A1 (ja) |
JP (1) | JP4577218B2 (ja) |
KR (1) | KR20060133996A (ja) |
CN (1) | CN1914348A (ja) |
CA (1) | CA2548788A1 (ja) |
TW (1) | TW200536946A (ja) |
WO (1) | WO2005056859A1 (ja) |
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JP2012214846A (ja) * | 2011-03-31 | 2012-11-08 | Kobe Steel Ltd | 成形加工用アルミニウム合金板およびその製造方法 |
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- 2004-12-13 US US10/582,272 patent/US20070209739A1/en not_active Abandoned
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- 2004-12-13 CN CNA2004800415748A patent/CN1914348A/zh active Pending
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JP2012214846A (ja) * | 2011-03-31 | 2012-11-08 | Kobe Steel Ltd | 成形加工用アルミニウム合金板およびその製造方法 |
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Also Published As
Publication number | Publication date |
---|---|
TW200536946A (en) | 2005-11-16 |
KR20060133996A (ko) | 2006-12-27 |
EP1702995A1 (en) | 2006-09-20 |
US20070209739A1 (en) | 2007-09-13 |
JPWO2005056859A1 (ja) | 2008-04-17 |
CA2548788A1 (en) | 2005-06-23 |
CN1914348A (zh) | 2007-02-14 |
JP4577218B2 (ja) | 2010-11-10 |
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