WO1997008354A1 - Tole en alliage d'aluminium presentant une excellente aptitude au formage superplastique a haute vitesse et procede de production de cette tole - Google Patents
Tole en alliage d'aluminium presentant une excellente aptitude au formage superplastique a haute vitesse et procede de production de cette tole Download PDFInfo
- Publication number
- WO1997008354A1 WO1997008354A1 PCT/JP1995/002564 JP9502564W WO9708354A1 WO 1997008354 A1 WO1997008354 A1 WO 1997008354A1 JP 9502564 W JP9502564 W JP 9502564W WO 9708354 A1 WO9708354 A1 WO 9708354A1
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- WO
- WIPO (PCT)
- Prior art keywords
- aluminum alloy
- less
- elongation
- alloy
- strain rate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- 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
-
- 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
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
Definitions
- the present invention high-speed superplastic forming excellent aluminum alloy plate, A 1 one Mg-based alloy sheet, especially strain rate to enable high-speed superplastic forming of 10 one 2 ⁇ 10Vs, and to a molding how.
- a superplastic alloy has been developed that suppresses recrystallization and refines the crystal grains of Mg-based alloys, for example, to produce several hundred percent elongation in the high temperature range of 500 to 550, and is applicable to various applications.
- strain rate is 10- 4 ⁇ 10_ 3 / s
- Mg 2.0-6.0%
- Be 0.0001-0.01%
- Ti 0.001-0.15%
- Fe and Si of impurities are both limited to 0.2% or less
- metals based on impurities are limited.
- An aluminum alloy plate in which the maximum grain size of the intermetallic compound is limited to 10 / m or less has been proposed (Japanese Unexamined Patent Publication No. 4-72030). This alloy plate has a strain rate of 10% at high temperature deformation at 400 ° C. - while indicating 350% or more elongation at Vs, hand stretch as the molding rate is increased is reduced, 10- not sufficient elongation is obtained in 2 / s or more strain rate.
- the present invention provides an alloy component and a quantitative combination thereof, an impurity amount, a distribution mode of an intermetallic compound based on the impurity, and a crystal. It was the result of repeated and diversified experiments and studies on the relationship between grain size and superplastic forming. The purpose was to limit Fe and Si as impurities, in particular.
- An object of the present invention is to provide an aluminum alloy sheet excellent in high-speed superplastic forming and a method for forming the aluminum alloy sheet.
- the aluminum alloy sheet excellent in high-speed superplastic forming according to the present invention for achieving the above object contains Mg: 3.0 to 8.0%, Ti: 0.001 to 0.1%, and has Fe as an impurity. 0.01% or less, Si is limited to 0.06% or less, an alloy consisting of the balance of A1 and unavoidable impurities, and an A1-Fe-Si system having a particle size of 1m or more in the matrix of the alloy.
- compound 2000 / fraction 2 below, the elongation when the average crystal grain size was molded at a strain rate of 10- 2 ⁇ 10Vs in a temperature range of 25 ⁇ 200 jam, 350 ⁇ 550 ° C is 350% or more This is a basic feature of the configuration.
- the second and third features of the present invention are to contain one or two of Mn: 0.10% or less and Cr: 0.10% or less in addition to Mg, Ti, and Cu. .
- Mg has an action of recrystallizing the alloy during high-temperature deformation.
- the preferred content range is 3.0 to 8.0%, and if less than 3.0%, the effect of accelerating recrystallization is small, and if it exceeds 8.0%, hot workability is deteriorated.
- a preferable content range is 0.05 to 0.50%. If the content is less than 0.05%, the effect is not sufficient, and if it exceeds 0.50%, the hot workability is reduced.
- Ti refines the crystal grains of the lump and helps to improve the superplastic properties of the alloy.
- a preferable content range is 0.001 to 0.1%. When the content is less than 0.001%, the effect is small, and when the content exceeds 0.1%, a coarse compound is formed to impair workability and ductility.
- Mn and Cr have a function of refining recrystallized grains during recrystallization of an alloy during high-temperature deformation.
- the preferred contents are each in the range of 0.10% or less, and if it exceeds 0.10%, the A1-FeSi-based compound having a particle size of 1 or more tends to increase, and the high-speed superplastic deformability of the alloy tends to decrease. .
- each of Fe and Si as impurities to 0.06 or less.
- the impurities Fe and Si produce insoluble A1-Fe-Si-based compounds, which precipitate at the grain boundaries, increasing the cavity and reducing the superplastic elongation.
- Fe: 0.05% or less and Si: 0.05% or less are limited.
- Be can be added in a range of 50 ppm or less to prevent oxidation of the molten metal, as in the case of the ordinary A1-Mg alloy.
- the A1-Fe-Si-based compound present in the matrix of the alloy causes the above-mentioned adverse effects, and the smaller the compound having a particle size of 1 m or more, the better.
- Its limit is the particle diameter A 1 -Fe- above 1 ⁇ M is S i diameter compounds 2000 / ⁇ 2 below, when distributed over 2,000 / field 2, Kiyabiti to the grain boundary is increased more than Reduces plastic elongation.
- the initial average grain size of the aluminum alloy plate it is necessary to control the initial average grain size of the aluminum alloy plate to 25 to 200 um. If the initial average crystal grain size is less than 25 m, the original crystal grains will appear when recrystallized during high-temperature deformation, and the insoluble compounds will precipitate. The grain boundaries disappear, and it is difficult to obtain a recrystallized structure composed of clean crystal grains resulting from the recrystallization. If the initial average grain size exceeds 200 jim, as the deformation rate increases, the shear deformation within the grains becomes remarkable and it becomes easy to break, so that the superplastic elongation decreases,
- the forming of the aluminum alloy sheet of the present invention is preferably performed at a temperature of 350 to 550. If the temperature is lower than 350 ° C, Al-Mg compounds and A 1 -Mg-(: 11 compounds are likely to precipitate at the crystal grain boundaries and the elongation decreases. If the forming temperature exceeds 550 ° C occur coarsening of crystal grains, the elongation becomes poor.
- strain rate during molding is preferably in the range of 10 one 3 ⁇ lOVs, the strain rate of less than 10_ 3 / s, elongation crystal grains are coarsened during deformation At a strain rate exceeding 10 ° ⁇ , shear deformation occurs in the crystal grains and causes cracks, or precipitation occurs at the crystal grain boundaries to reduce elongation.
- An aluminum alloy having the above composition is melted and manufactured according to a conventional method, and the obtained ingot is homogenized.
- the homogenization treatment is preferably performed at a temperature of 450 to 550 ° C. If it is less than 450, g Mg and Cu deviated at the crystal grain interface and cell boundary of the lump are not sufficiently re-dissolved to cause hot rolling cracks. At temperatures exceeding 550 ° C, A1-Mg-based or Al-Mg-Cu-based crystallization, which has a low melting point, causes eutectic melting and causes cracking during hot rolling. .
- the starting temperature of the hot rolling is from 250 to 500 ° C, and preferably less than 400 ° C. If hot rolling is started below 250 ° C, the hot rolling becomes difficult due to high deformation resistance of the material. When the hot rolling temperature is increased, it may be difficult to obtain a predetermined grain structure and a distribution of the precipitated compound due to a change in the distribution of the precipitate.
- cold rolling is performed.
- intermediate annealing may be performed during cold rolling.
- the final annealing of cold rolled material is carried out at temperatures between 350 and 550. In the case of annealing at less than 350 ° C, the anisotropy of the structure formed by hot rolling may not be sufficiently eliminated, and if it exceeds 550 ° C, local melting may occur at recrystallized grain boundaries.
- the final annealing is Preferably, rapid annealing treatment such as continuous annealing is used.
- the existing A 1 -Fe-Si compound is controlled to a specific distribution, and the crystal grain size is controlled to a specific range.
- the formation of cavities as grain boundaries is suppressed, and recrystallized grains of an average of 20 111 or less are formed during high-temperature deformation, and a strain rate of 10— It is possible to obtain a sufficient ductility of 350% or more, preferably 380% or more, even with high-speed molding.
- An A1-Mg-based aluminum alloy having the composition shown in Table 1 was melted and agglomerated by the DC method. After the obtained lump was homogenized at 530 for 10 hours, the thickness was reduced to 30 and hot rolling was started at a temperature of 390, followed by hot rolling to a thickness of 4 mm. Next, cold rolling was performed to reduce the sheet thickness to 2 mm, and rapid annealing was performed by rapidly heating to a temperature of 480 ° C and holding for 5 minutes. These plate as a test material, Te temperature of 480, a tensile test was performed at a strain rate of 10- 2 / s.
- the rates are shown in Table 1.
- the amount of the compound was determined by image processing. Also, in Table 1, those that are outside the conditions of the present invention are underlined. table 1
- test material Nos. 1 to 5 As shown in Table 1, all of the test materials Nos. 1 to 5 according to the present invention exhibited excellent elongation exceeding 400%. On the other hand, test material No. 6 had too much Cu content, and test material No. 7 had too much Mg content. . Test material No. 8 has a large amount of large-diameter compounds and a low elongation rate because it contains a large amount of impurities Fe and Si. Test material No. 9 has a low Mg content, so the recrystallization is insufficient during bow deformation and the elongation is low.
- a 1-Mg-based aluminum alloy having the composition shown in Table 2 was melted and manufactured in the same manner as in Example 1, and processed in the same process and under the same conditions as in Example 1 to produce a test material having a thickness of 2 mra. Then, a tensile test was performed on each test material under the same conditions as in Example 1. Average crystal grain size of each test material, amount of A1-Fe-Si-based compound with a grain size of 1 xm or more, measured by tensile test Table 2 shows the calculated elongation. In addition, in Table 2, those which are out of the conditions of the present invention are underlined.
- test materials Nos. 10 to 12 according to the present invention all exhibited excellent elongation exceeding 380%, whereas the test materials Nos. 13 to 14 had a high Mn content.
- test material No. 15 has a large amount of Cr, so that the distribution of A1-Fe-Si-based compounds with a particle size of 1 zm or more is large, and high-temperature elongation cannot be obtained.
- Example 2 An aluminum alloy having the same composition as that of test material No. 5 of Example 1 was melted and produced in the same manner as in Example 1, and the obtained ingot was homogenized at 520 for 8 hours, and then the ingot was removed. Hot rolling was started at a temperature of 390 ° C with a thickness of 30 mm, and hot-rolled to a thickness of 4 mm. Subsequently, a two-thick plate was formed by cold rolling, subjected to rapid annealing at a temperature of 480 and maintained for 5 minutes. As shown in Table 3, a tensile test was performed using the prepared sheet material as a test material while changing the forming temperature and the strain rate. Table 3 shows the elongation percentage of each test material.
- test materials Nos. 16 to 20 according to the present invention all exhibited excellent elongation of 380% or more, but the test material No. 21 had a high tensile test temperature and coarse grains. And the growth rate is decreasing. Test material No. 22 had a low strain rate, so the crystal grains became coarse during deformation and the elongation decreased. In test material No. 23, the elongation was reduced because the strain rate was too high. Industrial applicability
- An alloy plate is provided, and the superplastic forming is performed using the aluminum alloy plate, thereby shortening the forming time and improving the productivity.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Heat Treatment Of Steel (AREA)
- Metal Rolling (AREA)
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP95940435A EP0846781B1 (en) | 1995-08-23 | 1995-12-12 | Process of forming an aluminium sheet with excellent high speed superplastic formability |
| DE69519444T DE69519444T2 (de) | 1995-08-23 | 1995-12-12 | Verfahren zur Herstellung eines Aluminiumbleches mit hervorragender Hochgeschwindigkeitssuperplastizität |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7/237707 | 1995-08-23 | ||
| JP23770795A JP3145904B2 (ja) | 1995-08-23 | 1995-08-23 | 高速超塑性成形に優れたアルミニウム合金板およびその成形方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1997008354A1 true WO1997008354A1 (fr) | 1997-03-06 |
Family
ID=17019320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1995/002564 Ceased WO1997008354A1 (fr) | 1995-08-23 | 1995-12-12 | Tole en alliage d'aluminium presentant une excellente aptitude au formage superplastique a haute vitesse et procede de production de cette tole |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20010001969A1 (ja) |
| EP (1) | EP0846781B1 (ja) |
| JP (1) | JP3145904B2 (ja) |
| DE (1) | DE69519444T2 (ja) |
| WO (1) | WO1997008354A1 (ja) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4534573B2 (ja) * | 2004-04-23 | 2010-09-01 | 日本軽金属株式会社 | 高温高速成形性に優れたAl‐Mg合金板およびその製造方法 |
| WO2006077779A1 (ja) * | 2005-01-19 | 2006-07-27 | Kabushiki Kaisha Kobe Seiko Sho | アルミニウム合金板及びその製造方法 |
| WO2007080938A1 (ja) | 2006-01-12 | 2007-07-19 | Furukawa-Sky Aluminum Corp. | 高温高速成形用アルミニウム合金材及びその製造方法、並びにアルミニウム合金成形品の製造方法 |
| KR100676174B1 (ko) * | 2006-05-25 | 2007-02-01 | 주식회사 엠코 | 철골건축구조물용 착탈식 안전망 설치대 |
| US8323428B2 (en) * | 2006-09-08 | 2012-12-04 | Honeywell International Inc. | High strain rate forming of dispersion strengthened aluminum alloys |
| JP2016191137A (ja) * | 2015-03-31 | 2016-11-10 | 株式会社神戸製鋼所 | 樹脂被覆缶胴用アルミニウム合金板 |
| JP2018199866A (ja) * | 2018-08-24 | 2018-12-20 | 株式会社神戸製鋼所 | 樹脂被覆缶胴用アルミニウム合金板 |
| CN113695538B (zh) * | 2021-09-03 | 2023-07-25 | 中铝河南洛阳铝加工有限公司 | 一种高成形性镜面铝板带材的制备方法及镜面铝板带材 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02285046A (ja) * | 1989-04-26 | 1990-11-22 | Sky Alum Co Ltd | 超塑性加工用アルミニウム合金圧延板およびその製造方法 |
| JPH05212562A (ja) * | 1992-01-31 | 1993-08-24 | Sky Alum Co Ltd | ロールボンドパネルおよびその製造方法 |
| JPH0617178A (ja) * | 1991-09-26 | 1994-01-25 | Takeshi Masumoto | 超塑性アルミニウム基合金材料及び超塑性合金材料の製造方法 |
| JPH06240395A (ja) * | 1993-02-12 | 1994-08-30 | Sky Alum Co Ltd | 超塑性成形用アルミニウム合金板、その製造方法およびそれを用いた超塑性成形体 |
| JPH07197177A (ja) * | 1994-01-10 | 1995-08-01 | Sky Alum Co Ltd | キャビテーションの少ない超塑性成形用アルミニウム合金圧延板 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59159961A (ja) * | 1983-02-28 | 1984-09-10 | Mitsubishi Alum Co Ltd | 超塑性Al合金 |
| JP2517445B2 (ja) * | 1990-06-05 | 1996-07-24 | スカイアルミニウム株式会社 | ダイアフラム成形用a1合金板およびその製造方法 |
| JPH05230583A (ja) * | 1992-02-25 | 1993-09-07 | Mitsubishi Alum Co Ltd | 成形加工性のすぐれた高強度Al合金板材 |
| JPH05345963A (ja) * | 1992-06-12 | 1993-12-27 | Furukawa Alum Co Ltd | 高成形性アルミニウム合金板の製造方法 |
| DE69304009T2 (de) * | 1992-10-23 | 1997-02-06 | Furukawa Electric Co Ltd | Verfahren zur Herstellung von Blech aus Al-Mg - Legierung für Pressformen |
| DE69303461T2 (de) * | 1992-11-17 | 1996-11-28 | Furukawa Electric Co Ltd | Verfahren zur Herstellung von Blech aus Aluminiumlegierung mit ausgezeichneter Festigkeit und Verformbarkeit durch Tiefziehen |
| JPH07145441A (ja) * | 1993-01-27 | 1995-06-06 | Toyota Motor Corp | 超塑性アルミニウム合金およびその製造方法 |
| JPH08199272A (ja) * | 1995-01-19 | 1996-08-06 | Nippon Steel Corp | アルミニウム合金板とその成形方法 |
-
1995
- 1995-08-23 JP JP23770795A patent/JP3145904B2/ja not_active Expired - Fee Related
- 1995-12-12 DE DE69519444T patent/DE69519444T2/de not_active Expired - Fee Related
- 1995-12-12 US US09/000,097 patent/US20010001969A1/en not_active Abandoned
- 1995-12-12 EP EP95940435A patent/EP0846781B1/en not_active Expired - Lifetime
- 1995-12-12 WO PCT/JP1995/002564 patent/WO1997008354A1/ja not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02285046A (ja) * | 1989-04-26 | 1990-11-22 | Sky Alum Co Ltd | 超塑性加工用アルミニウム合金圧延板およびその製造方法 |
| JPH0617178A (ja) * | 1991-09-26 | 1994-01-25 | Takeshi Masumoto | 超塑性アルミニウム基合金材料及び超塑性合金材料の製造方法 |
| JPH05212562A (ja) * | 1992-01-31 | 1993-08-24 | Sky Alum Co Ltd | ロールボンドパネルおよびその製造方法 |
| JPH06240395A (ja) * | 1993-02-12 | 1994-08-30 | Sky Alum Co Ltd | 超塑性成形用アルミニウム合金板、その製造方法およびそれを用いた超塑性成形体 |
| JPH07197177A (ja) * | 1994-01-10 | 1995-08-01 | Sky Alum Co Ltd | キャビテーションの少ない超塑性成形用アルミニウム合金圧延板 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP0846781A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0959736A (ja) | 1997-03-04 |
| EP0846781B1 (en) | 2000-11-15 |
| EP0846781A1 (en) | 1998-06-10 |
| DE69519444T2 (de) | 2001-06-13 |
| JP3145904B2 (ja) | 2001-03-12 |
| US20010001969A1 (en) | 2001-05-31 |
| DE69519444D1 (de) | 2000-12-21 |
| EP0846781A4 (en) | 1998-11-18 |
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