EP0989195B1 - Warmfeste Aluminiumlegierung vom Typ AlCuMg - Google Patents
Warmfeste Aluminiumlegierung vom Typ AlCuMg Download PDFInfo
- Publication number
- EP0989195B1 EP0989195B1 EP98810967A EP98810967A EP0989195B1 EP 0989195 B1 EP0989195 B1 EP 0989195B1 EP 98810967 A EP98810967 A EP 98810967A EP 98810967 A EP98810967 A EP 98810967A EP 0989195 B1 EP0989195 B1 EP 0989195B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- panel
- maximum
- ingot
- aluminium alloy
- 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.)
- Revoked
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Classifications
-
- 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
- C22F1/057—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 copper as the next major constituent
-
- 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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
Definitions
- the invention relates to an aluminum alloy according to the preamble of claim 1.
- AlCuMg alloys with high mechanical strength and high heat resistance have in practice especially the alloy AA2618 and, due to its good weldability, the alloy AA2219 enforced.
- a newer alloy of type AA2618 with good Heat resistance is known from EP-A-0756014.
- Other alloys of the type AlCuMg are described in US-A-5 630 889, US-A-5 652 063, US-A-5 800 927 and EP-A-0 224 016.
- the invention has for its object an alloy of the type AlCuMg of the type mentioned with a compared to the known alloys to create increased thermal stability according to the prior art.
- the alloy for the production of plastic molds i.e. Injection molds for injection molding plastic, at operating temperatures up to about 160 ° C.
- the copper content is 5.2 to 5.4% by weight.
- the maximum solubility for copper in this alloy is around 5.2 to 5.3% Cu.
- Part of the copper is absorbed in the primary intermetallic phases AlFeMnCu, which makes it possible to practically reach the solubility limit.
- the primary eutectic phase Al 2 Cu forms in the structure, which does not contribute to the strength, but as a local cathodic element, however, reduces the corrosion resistance of the alloy.
- the alloy according to the invention preferably lies mainly in the phase field of the ⁇ '-precipitation hardening, with the equilibrium phase Al 2 Cu. If the magnesium content rises above 0.6%, there are corresponding proportions of S'-precipitation hardening with the equilibrium phase Al 2 CuMg.
- the positive effect of a silver additive on precipitation hardening is preferably effective in ⁇ '-precipitation hardening because the silver can form the ⁇ phase together with the magnesium on the (111) lattice planes of the aluminum matrix, which leads to an additional increase in strength , With even higher magnesium contents, the excretion of the ⁇ phase is superimposed by the S 'excretion and reduces the strength-increasing effect of silver.
- an alloy with higher magnesium contents is sensitive to the speed of the quenching treatment, which leads to a loss of strength in the middle of thick plates.
- an optimum between achievable strength at room temperature and at elevated temperatures is achieved.
- the alloy according to the invention is therefore particularly suitable for the production of thick plates.
- the alloy can be used to further increase strength Contain 0.05 to 0.5 wt .-%, preferably 0.3 to 0.5 wt .-% silver.
- an isotropic distribution of the internal stresses in the cross section of the plates produced by hot rolling is to be aimed for.
- the grain size and the grain shape in the plate are of importance for the reduction of the internal stresses.
- the grain boundaries act as sinks for dislocations when local stress peaks are reduced.
- a fine grain structure can be achieved in the hot-rolled plate by controlling the heat treatment and the hot rolling temperatures in such a way that the distribution of submicron precipitates of Al 3 Zr in the structure is as homogeneous as possible.
- the homogenized cast ingots can either be cooled from the homogenization temperature to the holding or hot rolling temperature or heated up to this temperature range.
- a heterogenization occurs with the elimination of the equilibrium phase Al 2 Cu.
- the phase interfaces of the Al 2 Cu particles are formed as preferred nucleation sites for the Al 3 Zr precipitates.
- the hot-rolled plate is subsequently heated to the solution annealing temperature, the Al 2 Cu particles dissolve and what remains is a uniform distribution of the fine, submicron Al 3 Zr precipitates, which are preferably due to the original Al 2 Cu particle boundaries and to sub-grain boundaries and thus one result in homogeneous distribution.
- These fine Al 3 Zr particles cause a strong growth inhibition during recrystallization during solution treatment and the desired isotropic grain structure results in the plate.
- the alloy which is particularly suitable for the production of Plastic molds are suitable, starting from a casting block without kneading operations are further processed, however, the manufacturing process usually includes at least one kneading step. If it is the dimensions of a Allow shape to be produced are preferred as the starting material hot-rolled plates used. In certain cases it can also turn out to be prove expedient, for example a decrease in thickness in a first Direction by hot rolling and in a second direction by forging to create. In particular for the production of inexpensive forms for The production of mass parts can also be extrusion as a processing step be considered. The extrusion process opens up basically also the possibility of certain contours of a later form already preform.
- Alloy A is according to the invention, alloys BAA2618 and AA 2219 serve as comparison alloys or reference materials.
- Alloys A and B were used as continuous cast ingots on an industrial scale cast.
- the homogenization of the cast ingots to compensate for the solidification Crystal segregation was carried out according to the usual procedure for AlCuMg alloys.
- the ingots cooled after the homogenization annealing were raised to 410 ° C heated, held at this temperature for 3 h and then starting rolled from this temperature to a plate thickness of 70 mm. Subsequently the plates were at a temperature of 520 ° C solution annealed and subsequently in water using a defined convective Heat transfer quenched so that the resulting residual stresses were controllable by the subsequent stretching operation. The stretched Plates were then at a temperature of 180 ° C during Cured warm for 12 hours.
- the yield stresses Rp 0.2 were determined after 300 h and 500 h of pre-storage at a temperature of 160 ° C by tensile tests at room temperature (RT) and at 160 ° C. The results are shown in Tables 2 and 3.
- the plates used as reference materials had a thickness of 20 mm in the case of alloy AA2618 and a thickness of 90 mm in the case of alloy AA2219.
- the creep data were determined on round specimens with a measuring length of 160 mm. Out the strain-time diagram in Fig. 1 are the results for the four examined Alloys visible.
- the load applied to the test bars was 260 MPa, the test temperature was set to 160 ° C.
- the curve A shows clearly the improved heat resistance compared to the comparative alloys the alloy according to the invention.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Metal Rolling (AREA)
- Conductive Materials (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Insulated Conductors (AREA)
- Arc Welding In General (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Description
- Giessen eines Barrens aus der Legierung,
- Homogenisieren des gegossenen Barrens,
- Halten des Barrens während mindestens 2.5 h in einem Temperaturbereich von 380 bis 440°C,
- Warmwalzen des Barrens zur Platte im Temperaturbereich von 380 bis 440°C,
- Lösungsglühen der Platte,
- Abschrecken der Platte,
- Strecken der Platte um 1 bis 5%, und
- Warmaushärten der Platte.
- - Fig. 1
- Dehnungs-Zeit Diagramm von erfindungsgemässen Legierungen im Vergleich zu Legierungen nach dem Stand der Technik.
Leg. | Zusammensetzung [Gew.-%] | |||||||||
Si | Fe | Cu | Mn | Mg | Ag | Ti | V | Zr | Ni | |
A | 0.10 | 0.14 | 5.25 | 0.30 | 0.60 | 0.38 | 0.08 | -- | 0.18 | -- |
B | 0.10 | 0.14 | 5.30 | 0.30 | 0.60 | -- | - | 0.09 | 0.20 | -- |
AA2618 | 0.15 | 1.05 | 2.60 | -- | 1.65 | -- | 0.06 | -- | -- | 1.10 |
AA2219 | 0.06 | 0.06 | 6.11 | 0.31 | 0.02 | -- | 0.04 | 0.08 | 0.12 | -- |
Legierung | Zugversuch bei RT (20°C) | |
Rp0.2 [MPa] nach 300 h | Rp0.2 [MPa] nach 500 h | |
A | 432 | 405 |
B | 407 | 390 |
AA2618 | 418 | -- |
AA2219 | 340 | 335 |
Legierung | Zugversuch bei 160°C | |
Rp0.2 [MPa] nach 300 h | Rp0.2 [MPa] nach 500 h | |
A | 370 | 350 |
B | 342 | 332 |
AA2618 | 350 | -- |
AA2219 | 281 | 270 |
Claims (4)
- Aluminiumlegierung vom Typ AlCuMg mit hoher mechanischer Festigkeit und hoher Wärmebeständigkeit, die im lösungsgeglühten, abgeschreckten, gestreckten und warmausgelagerten Zustand (T8) eine Fliessspannung bei Raumtemperatur von Rp0.2 > 450 MPa, nach einer Vorlagerung von 300 h bei 160°C eine Fliessspannung bei 160°C von Rp0.2 > 340 MPa und nach einer Kriechbelastung von 1000 h bei 160°C unter einer Zugspannung von 260 MPa eine Dehnung von weniger als 0.5% aufweist,
mit5.2 bis 5.4 Gew.-% Kupfer0.45 bis 0.65 Gew.-% Magnesium0.2 bis 0.4 Gew.-% Manganmax. 0.2 Gew.-% Siliziummax. 0.25 Gew.-% Eisenmax. 0.15 Gew.-% Titanwahlweise noch0.12 bis 0.25 Gew.-% Zirkonium0.05 bis 0.5 Gew.-% Silber - Aluminiumlegierung nach Anspruch 1, dadurch gekennzeichnet, dass sie 0.3 bis 0.5 Gew.-% Silber enthält.
- Verfahren zur Herstellung einer Platte aus einer Aluminiumlegierung nach Anspruch 1 oder 2, gekennzeichnet durch die Schritte(a) Giessen eines Barrens aus der Legierung,(b) Homogenisieren des gegossenen Barrens,(c) Halten des Barrens während mindestens 2.5 h in einem Temperaturbereich von 380 bis 440°C,(d) Warmwalzen des Barrens zur Platte im Temperaturbereich von 380 bis 440°C,(e) Lösungsglühen der Platte,(f) Abschrecken der Platte,(g) Strecken der Platte um 1 bis 5%, und(h) Warmaushärten der Platte.
- Verwendung einer Aluminiumlegierung nach Anspruch 1 oder 2 oder einer Platte hergestellt mit dem Verfahren nach Anspruch 3 zur Herstellung von Kunststoffformen.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59803924T DE59803924D1 (de) | 1998-09-25 | 1998-09-25 | Warmfeste Aluminiumlegierung vom Typ AlCuMg |
EP98810967A EP0989195B1 (de) | 1998-09-25 | 1998-09-25 | Warmfeste Aluminiumlegierung vom Typ AlCuMg |
ES98810967T ES2175647T3 (es) | 1998-09-25 | 1998-09-25 | Aleacion de aluminio resistente al calor del tipo alcumg. |
AT98810967T ATE216737T1 (de) | 1998-09-25 | 1998-09-25 | Warmfeste aluminiumlegierung vom typ alcumg |
PT98810967T PT989195E (pt) | 1998-09-25 | 1998-09-25 | Liga de aluminio resistente ao calor do tigo alcumg |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98810967A EP0989195B1 (de) | 1998-09-25 | 1998-09-25 | Warmfeste Aluminiumlegierung vom Typ AlCuMg |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0989195A1 EP0989195A1 (de) | 2000-03-29 |
EP0989195B1 true EP0989195B1 (de) | 2002-04-24 |
Family
ID=8236350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98810967A Revoked EP0989195B1 (de) | 1998-09-25 | 1998-09-25 | Warmfeste Aluminiumlegierung vom Typ AlCuMg |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0989195B1 (de) |
AT (1) | ATE216737T1 (de) |
DE (1) | DE59803924D1 (de) |
ES (1) | ES2175647T3 (de) |
PT (1) | PT989195E (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7883591B2 (en) | 2004-10-05 | 2011-02-08 | Aleris Aluminum Koblenz Gmbh | High-strength, high toughness Al-Zn alloy product and method for producing such product |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2823767B1 (fr) | 2001-04-24 | 2004-02-06 | Pechiney Rhenalu | Blocs metalliques de forte epaisseur destines a l'usinage |
US7494552B2 (en) * | 2002-08-20 | 2009-02-24 | Aleris Aluminum Koblenz Gmbh | Al-Cu alloy with high toughness |
US7604704B2 (en) | 2002-08-20 | 2009-10-20 | Aleris Aluminum Koblenz Gmbh | Balanced Al-Cu-Mg-Si alloy product |
US7323068B2 (en) | 2002-08-20 | 2008-01-29 | Aleris Aluminum Koblenz Gmbh | High damage tolerant Al-Cu alloy |
DE112004000603B4 (de) | 2003-04-10 | 2022-11-17 | Novelis Koblenz Gmbh | AI-Zn-Mg-Cu-Legierung |
US8043445B2 (en) | 2003-06-06 | 2011-10-25 | Aleris Aluminum Koblenz Gmbh | High-damage tolerant alloy product in particular for aerospace applications |
US8002913B2 (en) * | 2006-07-07 | 2011-08-23 | Aleris Aluminum Koblenz Gmbh | AA7000-series aluminum alloy products and a method of manufacturing thereof |
CN100469928C (zh) * | 2007-03-30 | 2009-03-18 | 中南大学 | 一种高强耐热铝合金及其管材的制备方法 |
CN105274408A (zh) * | 2015-10-15 | 2016-01-27 | 东北轻合金有限责任公司 | 一种航空航天用铝合金铆钉线材的制造方法 |
CN109898000B (zh) * | 2019-03-29 | 2020-12-15 | 郑州轻研合金科技有限公司 | 一种超高强耐热铝合金及其制备方法 |
CN109825749A (zh) * | 2019-04-10 | 2019-05-31 | 上海裕纪金属制品有限公司 | 一种可冲压铝合金型材耐热耐腐蚀热处理方法及铝合金型材 |
CN115874031B (zh) * | 2022-12-07 | 2023-08-15 | 东北轻合金有限责任公司 | 一种航空用2a12铝合金板材的加工方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH668269A5 (de) * | 1985-10-31 | 1988-12-15 | Bbc Brown Boveri & Cie | Aluminium-knetlegierung des typs al/cu/mg mit hoher festigkeit im temperaturbereich zwischen 0 und 250 c. |
US5503690A (en) * | 1994-03-30 | 1996-04-02 | Reynolds Metals Company | Method of extruding a 6000-series aluminum alloy and an extruded product therefrom |
JPH11502264A (ja) * | 1995-03-21 | 1999-02-23 | カイザー アルミナム アンド ケミカル コーポレーシヨン | 航空機用アルミニウムシートの製造方法 |
US5652063A (en) * | 1995-03-22 | 1997-07-29 | Aluminum Company Of America | Sheet or plate product made from a substantially vanadium-free aluminum alloy |
US5800927A (en) * | 1995-03-22 | 1998-09-01 | Aluminum Company Of America | Vanadium-free, lithium-free, aluminum alloy suitable for sheet and plate aerospace products |
US5630889A (en) * | 1995-03-22 | 1997-05-20 | Aluminum Company Of America | Vanadium-free aluminum alloy suitable for extruded aerospace products |
FR2737225B1 (fr) * | 1995-07-28 | 1997-09-05 | Pechiney Rhenalu | Alliage al-cu-mg a resistance elevee au fluage |
-
1998
- 1998-09-25 AT AT98810967T patent/ATE216737T1/de not_active IP Right Cessation
- 1998-09-25 DE DE59803924T patent/DE59803924D1/de not_active Revoked
- 1998-09-25 ES ES98810967T patent/ES2175647T3/es not_active Expired - Lifetime
- 1998-09-25 PT PT98810967T patent/PT989195E/pt unknown
- 1998-09-25 EP EP98810967A patent/EP0989195B1/de not_active Revoked
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7883591B2 (en) | 2004-10-05 | 2011-02-08 | Aleris Aluminum Koblenz Gmbh | High-strength, high toughness Al-Zn alloy product and method for producing such product |
Also Published As
Publication number | Publication date |
---|---|
PT989195E (pt) | 2002-08-30 |
ATE216737T1 (de) | 2002-05-15 |
EP0989195A1 (de) | 2000-03-29 |
ES2175647T3 (es) | 2002-11-16 |
DE59803924D1 (de) | 2002-05-29 |
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