US20190055628A1 - Al-casting alloy - Google Patents

Al-casting alloy Download PDF

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Publication number
US20190055628A1
US20190055628A1 US16/080,829 US201716080829A US2019055628A1 US 20190055628 A1 US20190055628 A1 US 20190055628A1 US 201716080829 A US201716080829 A US 201716080829A US 2019055628 A1 US2019055628 A1 US 2019055628A1
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casting alloy
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US16/080,829
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Oliver Grimm
Klaus Greven
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KSM Castings Group GmbH
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KSM Castings Group GmbH
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Assigned to KSM CASTINGS GROUP GMBH reassignment KSM CASTINGS GROUP GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GREVEN, KLAUS, GRIMM, OLIVER
Publication of US20190055628A1 publication Critical patent/US20190055628A1/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • 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
    • C22F1/043—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 silicon as the next major constituent

Definitions

  • the invention relates to an aluminum casting alloy.
  • Si 3.0% to 3.8% by weight
  • Mg 0.3% to 0.8% by weight
  • Cr 0.05% to 0.35% by weight
  • Fe ⁇ 0.18% by weight
  • Mn ⁇ 0.06% by weight
  • Ti ⁇ 0.16% by weight
  • Cu 0.006-0.015% by weight
  • Sr 0.010 to 0.030% by weight Zr ⁇ 0.006% by weight Zn ⁇ 0.006% by weight
  • Impurities ⁇ 0.1% by weight and is supplemented by Al to an extent of 100% by weight in each case.
  • Such an Al casting alloy is stronger, tougher and more ductile compared to the prior art.
  • the inventive selection of alloy constituents in the order of magnitude specified leads to a further significant improvement in the mechanical properties which is already apparent in the cast state, but especially in a cast component after a 2-stage heat treatment, namely a solution annealing operation and a subsequent age hardening operation, with preferable provision of quenching of the cast component in water between these two heat treatment steps.
  • a 2-stage heat treatment namely a solution annealing operation and a subsequent age hardening operation
  • quenching of the cast component in water between these two heat treatment steps preferably for wheel-bearing components, very preferably for damper stilts, wheel bearings and especially swivel bearings, but also for control arms, the result is an overall increase in mechanical indices.
  • Cu is present with a content of more than 0.006% by weight, preferably of more than 0.007% by weight, more preferably of more than 0.008% by weight, most preferably at least 0.009% by weight.
  • Cu is present with a content of less than 0.015% by weight, preferably of less than 0.013% by weight, more preferably of less than 0.012% by weight, most preferably of less than 0.011% by weight.
  • the alloys of the invention may contain impurities resulting from the preparation, for example Pb, Ni, etc., as is common knowledge to the person skilled in the art.
  • Si is present with a content of more than 3.1% by weight, preferably of more than 3.3% by weight, more preferably of more than 3.4% by weight.
  • Si is present with a content of less than 3.7% by weight, preferably of less than 3.5% by weight.
  • Si is present with a content of more than 3.3% to less than 3.7% by weight.
  • Si may be advantageous when Si is present with a content of more than 3.0% to less than 3.3% by weight.
  • Mg is present with a content of more than 0.40% by weight, preferably of more than 0.50% by weight, more preferably of more than 0.55% by weight.
  • Mg is present with a content of less than 0.70% by weight, preferably of less 0.60% by weight.
  • Cr is present with a content of more than 0.10% by weight, preferably of more than 0.15% by weight, more preferably of more than 0.20% by weight, most preferably of more than 0.25% by weight.
  • Cr is present with a content of at most 0.30% by weight, preferably of less than 0.30% by weight.
  • Fe is present with a content of more than 0.01% by weight, preferably of more than 0.05% by weight, more preferably of more than 0.07% by weight.
  • Fe is present with a content of less than 0.15% by weight, preferably of less than 0.12% by weight.
  • Mn is present with a content of more than 0.01% by weight, preferably of more than 0.02% by weight.
  • Mn is present with a content less than 0.15% by weight, preferably of less than 0.12% by weight, more preferably of less than 0.10% by weight.
  • Ti is present with a content of more than 0.01% by weight, preferably of more than 0.03% by weight, more preferably of more than 0.04% by weight.
  • Sr is present with a content of more than 0.015% by weight, preferably of more than 0.020% by weight.
  • Sr is present with a content of less than 0.030% by weight, preferably of less than 0.025% by weight.
  • Zr is present with a content of more than 0.001% by weight.
  • Zr is present with a content of less than 0.005% by weight, preferably of less than 0.004% by weight, more preferably of less than 0.003% by weight.
  • Zn is present with a content of more than 0.001% by weight, preferably of more than 0.002% by weight.
  • Zn is present with a content of less than 0.005% by weight, preferably of less than 0.004% by weight.
  • impurities are present with a content of less than 0.05% by weight, preferably less than 0.035% by weight.
  • the Al casting alloy of the invention is a low-pressure casting Al alloy.
  • the invention also relates to a method of producing a cast component from an Al casting alloy as claimed in any of claims 1 to 22 , in which the low-pressure casting method is employed.
  • the Al casting alloy is a counterpressure casting (CPC) Al alloy.
  • the invention also relates to a method of producing a cast component from an Al casting alloy as claimed in any of claims 1 to 22 , in which the low-pressure counterpressure casting method is employed.
  • Various permanent mold casting methods are suitable in principle as manufacturing methods for cast components, especially as chassis parts, preferably as wheel-bearing components, very preferably as damper stilts, wheel bearings or swivel bearings, of motor vehicles made from the cast alloy of the invention. Owing to the very good mechanical properties in the case of highly stressed wheel-bearing parts of motor vehicles, however, particularly low-pressure diecasting and the counterpressure casting (CPC) method, which is also referred to as the counterpressure diecasting method, are suitable as manufacturing methods.
  • CPC counterpressure casting
  • Manufacturing methods employed for cast components, especially as chassis parts, preferably as wheel-bearing components, very preferably as damper stilts, wheel bearings or swivel bearings, of motor vehicles made from the cast alloy of the invention may advantageously be squeeze-casting, gravity diecasting or pressure diecasting, especially thixocasting, rheocasting or low-pressure sand casting.
  • the cast components are subjected to a two-stage heat treatment, namely a solution annealing operation and a subsequent age hardening operation. It may be advantageous when the cast component is quenched in water between the two heat treatment stages.
  • the cast component after the casting operation is solution-annealed between 530° C. and 550° C. for 6 to 10 h, preferably between 540° C. and 550° C. for 7 to 9 h, especially for 8 to 9 h, most preferably between more than 540° C. and 550° C. for 7 to 9 h, especially for 8 to 9 h.
  • the cast component after the casting operation is tempered between 180° C. and 210° C. for 1 to 8 h, especially for 1 to 6.5 h, preferably between 180° C. and 190° C. for 1 to 6.5 h, especially for 4 to 6.5 h, more preferably between 180° C. and less than 190° C. for 4 to 6.5 h, especially for 5 to 6.5 h.
  • the invention further provides for the use of an Al casting alloy as claimed in any of the claims or of a cast component, especially one that has been heat-treated, as claimed in any of the claims for chassis parts of motor vehicles, preferably for wheel-bearing components of motor vehicles, most preferably for damper stilts, wheel bearings or swivel bearings of motor vehicles.
  • the cast components have an improved strength/strain ratio coupled with improved microstructure properties.
  • the casting method firstly enables a casting free of larger defects, known as craters; secondly, the microstructure is positively affected in such a way that the number of inner indentations that reduce elongation at break is kept to a minimum.
  • the Al casting alloy of the invention has been found to be especially suitable particularly for components under relatively high stress, such as damper stilts, wheel bearings or swivel bearings.
  • a very preferred process for production of such relatively highly stressed components is the counterpressure diecasting (CPC) method.
  • Cast components of the invention that have been produced from an Al casting alloy as claimed in any of the claims and/or by a method as claimed in any of the claims feature, after a heat treatment, a yield point R P 0.2 of 300 to 330 MPa, preferably of >320 to 330 MPa, and/or an elongation at break A5 of 7% to 11%, preferably of 8.5% to 10%, more preferably of 9% to 9.5%, and/or a tensile strength R m of 350-375 MPa, preferably of >360-375 MPa.

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  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Sliding-Contact Bearings (AREA)
  • Air Bags (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Conductive Materials (AREA)

Abstract

The invention relates to an Al casting alloy.

Description

  • The invention relates to an aluminum casting alloy.
  • DE 10 2008 055 928 A1, DE 10 2012 108 590 A, DE 10 2013 108 127 A1 and DE 10 2014 101 317 A1 disclose various low-Si Al casting alloys.
  • Proceeding from this prior art, it is an object of the present invention to provide an improved low-Si Al casting alloy which has especially been further developed with regard to its mechanical properties.
  • This is achieved in accordance with the invention by an Al casting alloy containing at least five of the following alloy constituents:
  • Si: 3.0% to 3.8% by weight
    Mg: 0.3% to 0.8% by weight
    Cr: 0.05% to 0.35% by weight
    Fe: <0.18% by weight
    Mn: <0.06% by weight
    Ti: <0.16% by weight
    Cu: 0.006-0.015% by weight
    Sr: 0.010 to 0.030% by weight
    Zr<0.006% by weight
    Zn<0.006% by weight
    Impurities: <0.1% by weight
    and is supplemented by Al to an extent of 100% by weight in each case.
  • Such an Al casting alloy is stronger, tougher and more ductile compared to the prior art.
  • The inventive selection of alloy constituents in the order of magnitude specified leads to a further significant improvement in the mechanical properties which is already apparent in the cast state, but especially in a cast component after a 2-stage heat treatment, namely a solution annealing operation and a subsequent age hardening operation, with preferable provision of quenching of the cast component in water between these two heat treatment steps. For chassis applications, preferably for wheel-bearing components, very preferably for damper stilts, wheel bearings and especially swivel bearings, but also for control arms, the result is an overall increase in mechanical indices.
  • Entirely unexpectedly, especially in relation to the mechanical index of elongation at break A5, it has been found that the upper limit specified as critical for copper in DE 10 2013 108 127 A1 of 0.006% by weight is exceeded in a manner essential to the invention.
  • For optimization of the mechanical indices, it may be advantageous when Cu is present with a content of more than 0.006% by weight, preferably of more than 0.007% by weight, more preferably of more than 0.008% by weight, most preferably at least 0.009% by weight. For optimization of the mechanical indices, it may be advantageous when Cu is present with a content of less than 0.015% by weight, preferably of less than 0.013% by weight, more preferably of less than 0.012% by weight, most preferably of less than 0.011% by weight.
  • The alloys of the invention may contain impurities resulting from the preparation, for example Pb, Ni, etc., as is common knowledge to the person skilled in the art.
  • For optimization of the mechanical indices, it may be advantageous when Si is present with a content of more than 3.1% by weight, preferably of more than 3.3% by weight, more preferably of more than 3.4% by weight. For optimization of the mechanical indices, it may be advantageous when Si is present with a content of less than 3.7% by weight, preferably of less than 3.5% by weight.
  • It may be advantageous for particular applications when Si is present with a content of more than 3.3% to less than 3.7% by weight. For some other applications, it may be advantageous when Si is present with a content of more than 3.0% to less than 3.3% by weight.
  • For optimization of the mechanical indices, it may be advantageous when Mg is present with a content of more than 0.40% by weight, preferably of more than 0.50% by weight, more preferably of more than 0.55% by weight. For optimization of the mechanical indices, it may be advantageous when Mg is present with a content of less than 0.70% by weight, preferably of less 0.60% by weight.
  • For optimization of the mechanical indices, it may be advantageous when Cr is present with a content of more than 0.10% by weight, preferably of more than 0.15% by weight, more preferably of more than 0.20% by weight, most preferably of more than 0.25% by weight. For optimization of the mechanical indices, it may be advantageous when Cr is present with a content of at most 0.30% by weight, preferably of less than 0.30% by weight.
  • For optimization of the mechanical indices, it may be advantageous when Fe is present with a content of more than 0.01% by weight, preferably of more than 0.05% by weight, more preferably of more than 0.07% by weight. For optimization of the mechanical indices, it may be advantageous when Fe is present with a content of less than 0.15% by weight, preferably of less than 0.12% by weight.
  • For optimization of the mechanical indices, it may be advantageous when Mn is present with a content of more than 0.01% by weight, preferably of more than 0.02% by weight. For optimization of the mechanical indices, it may be advantageous when Mn is present with a content less than 0.15% by weight, preferably of less than 0.12% by weight, more preferably of less than 0.10% by weight.
  • For optimization of the mechanical indices, it may be advantageous when Ti is present with a content of more than 0.01% by weight, preferably of more than 0.03% by weight, more preferably of more than 0.04% by weight. For optimization of the mechanical indices, it may be advantageous when Ti is present with a content of less than 0.10% by weight, preferably of less than 0.08% by weight, more preferably of less than 0.065% by weight, most preferably of less than 0.055% by weight.
  • For optimization of the mechanical indices, it may be advantageous when Sr is present with a content of more than 0.015% by weight, preferably of more than 0.020% by weight. For optimization of the mechanical indices, it may be advantageous when Sr is present with a content of less than 0.030% by weight, preferably of less than 0.025% by weight.
  • For optimization of the mechanical indices, it may be advantageous when Zr is present with a content of more than 0.001% by weight. For optimization of the mechanical indices, it may be advantageous when Zr is present with a content of less than 0.005% by weight, preferably of less than 0.004% by weight, more preferably of less than 0.003% by weight.
  • For optimization of the mechanical indices, it may be advantageous when Zn is present with a content of more than 0.001% by weight, preferably of more than 0.002% by weight. For optimization of the mechanical indices, it may be advantageous when Zn is present with a content of less than 0.005% by weight, preferably of less than 0.004% by weight.
  • For numerous applications, it may be advantageous when impurities are present with a content of less than 0.05% by weight, preferably less than 0.035% by weight.
  • For certain cast components, it has been found to be advantageous when the Al casting alloy of the invention is a low-pressure casting Al alloy.
  • Accordingly, the invention also relates to a method of producing a cast component from an Al casting alloy as claimed in any of claims 1 to 22, in which the low-pressure casting method is employed.
  • For particular cast components, it has been found to be advantageous when the Al casting alloy is a counterpressure casting (CPC) Al alloy.
  • Accordingly, the invention also relates to a method of producing a cast component from an Al casting alloy as claimed in any of claims 1 to 22, in which the low-pressure counterpressure casting method is employed.
  • Various permanent mold casting methods are suitable in principle as manufacturing methods for cast components, especially as chassis parts, preferably as wheel-bearing components, very preferably as damper stilts, wheel bearings or swivel bearings, of motor vehicles made from the cast alloy of the invention. Owing to the very good mechanical properties in the case of highly stressed wheel-bearing parts of motor vehicles, however, particularly low-pressure diecasting and the counterpressure casting (CPC) method, which is also referred to as the counterpressure diecasting method, are suitable as manufacturing methods.
  • Manufacturing methods employed for cast components, especially as chassis parts, preferably as wheel-bearing components, very preferably as damper stilts, wheel bearings or swivel bearings, of motor vehicles made from the cast alloy of the invention may advantageously be squeeze-casting, gravity diecasting or pressure diecasting, especially thixocasting, rheocasting or low-pressure sand casting.
  • In order to achieve or even further develop the abovementioned advantages, it is advantageous when the cast components are subjected to a two-stage heat treatment, namely a solution annealing operation and a subsequent age hardening operation. It may be advantageous when the cast component is quenched in water between the two heat treatment stages.
  • It may be appropriate when the cast component after the casting operation is solution-annealed between 530° C. and 550° C. for 6 to 10 h, preferably between 540° C. and 550° C. for 7 to 9 h, especially for 8 to 9 h, most preferably between more than 540° C. and 550° C. for 7 to 9 h, especially for 8 to 9 h.
  • It may be appropriate when the cast component after the casting operation is tempered between 180° C. and 210° C. for 1 to 8 h, especially for 1 to 6.5 h, preferably between 180° C. and 190° C. for 1 to 6.5 h, especially for 4 to 6.5 h, more preferably between 180° C. and less than 190° C. for 4 to 6.5 h, especially for 5 to 6.5 h.
  • The invention further provides for the use of an Al casting alloy as claimed in any of the claims or of a cast component, especially one that has been heat-treated, as claimed in any of the claims for chassis parts of motor vehicles, preferably for wheel-bearing components of motor vehicles, most preferably for damper stilts, wheel bearings or swivel bearings of motor vehicles.
  • According to the invention, the cast components have an improved strength/strain ratio coupled with improved microstructure properties. The casting method firstly enables a casting free of larger defects, known as craters; secondly, the microstructure is positively affected in such a way that the number of inner indentations that reduce elongation at break is kept to a minimum.
  • As already mentioned, the Al casting alloy of the invention has been found to be especially suitable particularly for components under relatively high stress, such as damper stilts, wheel bearings or swivel bearings. A very preferred process for production of such relatively highly stressed components is the counterpressure diecasting (CPC) method.
  • Cast components of the invention that have been produced from an Al casting alloy as claimed in any of the claims and/or by a method as claimed in any of the claims feature, after a heat treatment, a yield point RP0.2 of 300 to 330 MPa, preferably of >320 to 330 MPa, and/or an elongation at break A5 of 7% to 11%, preferably of 8.5% to 10%, more preferably of 9% to 9.5%, and/or a tensile strength Rm of 350-375 MPa, preferably of >360-375 MPa.
    • EXAMPLE
  • To ascertain the mechanical properties of an alloy of the invention containing 3.4% by weight of Si, 0.6% by weight of Mg, 0.27% by weight of Cr, 0.09% by weight of Fe, 0.03% by weight of Mn, 0.05% by weight of Ti, 0.009% by weight of Cu, 0.022% by weight of Sr, 0.002% by weight of Zr, 0.003% by weight of Zn and impurities of less than 0.1% by weight, in each case supplemented to 100% by weight with Al, what is called a “French tensile specimen” according to DIN 50125 is cut out of a swivel bearing produced by means of a counterpressure diecasting (CPC) method, the swivel bearing having received a heat treatment (solution annealing at 540° C. for 8 h, quenching in water, age hardening at 180° C. for 6.5 h) beforehand. The casting of comparative examples (AlSi3Mg0.5 and AlSi3Mg0.5Cr0.3) and subsequent heat treatment are effected under the same conditions. The alloys to be compared differ solely in the chromium content. The specimen is taken at the same position in the swivel bearing. The mechanical properties of tensile strength Rm, yield point Rp0.2 and elongation at break A5 according to DIN10002 are ascertained.
  • Rm [MPa] Rp0.2 [MPa] A5 [%]
    AlSi3Mg0.5 327 263 9.3
    Alloy of the invention 369 322 9.12
    AlSi3Mg0.5Cr0.3 358 308 6.9
  • Against the background of DE 10 2013 108 127 A1 and the upper limit for copper of 0.006% by weight which is specified as critical for the mechanical indices, the achievement of the abovementioned mechanical indices for the alloy of the invention was not to be expected.

Claims (24)

1. An Al casting alloy containing at least five of the following alloy constituents:
Si: 3.0% to 3.8% by weight
Mg: 0.3% to 0.8% by weight
Cr: 0.05% to 0.35% by weight
Fe: <0.18% by weight
Mn: <0.06% by weight
Ti: <0.16% by weight
Cu: 0.006-0.015% by weight
Sr: 0.010% to 0.030% by weight
Zr<0.006% by weight
Zn<0.006% by weight
Impurities: <0.1% by weight
and is supplemented by Al to an extent of 100% by weight in each case.
2. The Al casting alloy as claimed in claim 1, wherein Si is present with a content of more than 3.1% by weight, preferably of more than 3.3% by weight, more preferably of more than 3.4% by weight.
3. The Al casting alloy as claimed in claim 1, wherein Si is present with a content of less than 3.7% by weight, preferably of less than 3.5% by weight.
4. The Al casting alloy as claimed in claim 1, wherein Mg is present with a content of more than 0.40% by weight, preferably of more than 0.50% by weight, more preferably of more than 0.55% by weight.
5. The Al casting alloy as claimed in claim 1, wherein Mg is present with a content of less than 0.70% by weight, preferably of less 0.60% by weight.
6. The Al casting alloy as claimed in claim 1, wherein Cr is present with a content of more than 0.10% by weight, preferably of more than 0.15% by weight, more preferably of more than 0.20% by weight, most preferably of more than 0.25% by weight.
7. The Al casting alloy as claimed in claim 1, wherein Cr is present with a content of at most 0.30% by weight, preferably of less than 0.30% by weight.
8. The Al casting alloy as claimed in claim 1, wherein Fe is present with a content of more than 0.01% by weight, preferably of more than 0.05% by weight, more preferably of more than 0.07% by weight.
9. The Al casting alloy as claimed claim 1, wherein Fe is present with a content of less than 0.15% by weight, preferably of less than 0.12% by weight.
10. The Al casting alloy as claimed in claim 1, wherein Mn is present with a content of more than 0.01% by weight, preferably of more than 0.02% by weight.
11. The Al casting alloy as claimed in claim 1, wherein Mn is present with a content less than 0.15% by weight, preferably of less than 0.12% by weight, more preferably of less than 0.10% by weight.
12. The Al casting alloy as claimed in claim 1, wherein Ti is present with a content of more than 0.01% by weight, preferably of more than 0.03% by weight, more preferably of more than 0.04% by weight.
13. The Al casting alloy as claimed in claim 1, wherein Ti is present with a content of less than 0.10% by weight, preferably of less than 0.08% by weight, more preferably of less than 0.065% by weight, most preferably of less than 0.055% by weight.
14. The Al casting alloy as claimed in claim 1, wherein Cu is present with a content of more than 0.006% by weight, preferably of more than 0.007% by weight, more preferably of more than 0.008% by weight, most preferably at least 0.009% by weight.
15. The Al casting alloy as claimed in claim 1, wherein Cu is present with a content of less than 0.015% by weight, preferably of less than 0.013% by weight, more preferably of less than 0.012% by weight, most preferably of less than 0.011% by weight.
16. The Al casting alloy as claimed in claim 1, wherein Sr is present with a content of more than 0.015% by weight, preferably of more than 0.020% by weight.
17. The Al casting alloy as claimed in claim 1, wherein Sr is present with a content of less than 0.030% by weight, preferably of less than 0.025% by weight.
18. The Al casting alloy as claimed in claim 1, wherein Zr is present with a content of more than 0.001% by weight.
19. The Al casting alloy as claimed in claim 1, wherein Zr is present with a content of less than 0.005% by weight, preferably of less than 0.004% by weight, more preferably of less than 0.003% by weight.
20. The Al casting alloy as claimed in claim 1, wherein Zn is present with a content of more than 0.001% by weight, preferably of more than 0.002% by weight.
21. The Al casting alloy as claimed in claim 1, wherein Zn is present with a content of less than 0.005% by weight, preferably of less than 0.004% by weight.
22. The Al casting alloy as claimed in claim 1, wherein impurities are present with a content of less than 0.05% by weight, preferably less than 0.035% by weight.
23-32. (canceled)
33. A cast component produced from an Al casting alloy as claimed in claim 1, wherein the cast component after a heat treatment has a yield point RP0.2 of 300 to 330 MPa, preferably of >320 to 330 MPa, and/or an elongation at break A5 of 7% to 11%, preferably of 8.5% to 10%, more preferably of 9% to 9.5%, and/or a tensile strength Rm of 350-375 MPa, preferably of >360-375 MPa.
US16/080,829 2016-03-01 2017-02-16 Al-casting alloy Abandoned US20190055628A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102016103626 2016-03-01
DE102016103626.9 2016-03-01
PCT/DE2017/100117 WO2017148468A1 (en) 2016-03-01 2017-02-16 Al-casting alloy

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EP (1) EP3423606B1 (en)
JP (1) JP2019512051A (en)
CN (1) CN108699639A (en)
DE (2) DE112017001083A5 (en)
WO (1) WO2017148468A1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN113005335A (en) * 2021-02-22 2021-06-22 李秋明 Novel aluminum alloy material, thin-wall part and metal hand die

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4101941A1 (en) * 2021-06-07 2022-12-14 Dubai Aluminium PJSC Aluminium-silicon casting alloy, and castings made from said alloy

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JP2019512051A (en) 2019-05-09
EP3423606A1 (en) 2019-01-09

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