CA3011631A1 - Hardenable al-mg-si-based aluminum alloy - Google Patents
Hardenable al-mg-si-based aluminum alloy Download PDFInfo
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- CA3011631A1 CA3011631A1 CA3011631A CA3011631A CA3011631A1 CA 3011631 A1 CA3011631 A1 CA 3011631A1 CA 3011631 A CA3011631 A CA 3011631A CA 3011631 A CA3011631 A CA 3011631A CA 3011631 A1 CA3011631 A1 CA 3011631A1
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 66
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000011651 chromium Substances 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 14
- 239000010949 copper Substances 0.000 claims abstract description 13
- 229910052718 tin Inorganic materials 0.000 claims abstract description 13
- 239000011777 magnesium Substances 0.000 claims abstract description 12
- 239000010936 titanium Substances 0.000 claims abstract description 12
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052738 indium Inorganic materials 0.000 claims abstract description 10
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011572 manganese Substances 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 claims abstract description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 239000010703 silicon Substances 0.000 claims abstract description 3
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000006104 solid solution Substances 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 3
- 229910019064 Mg-Si Inorganic materials 0.000 claims 1
- 229910019406 Mg—Si Inorganic materials 0.000 claims 1
- 229920001187 thermosetting polymer Polymers 0.000 abstract description 8
- 229910045601 alloy Inorganic materials 0.000 description 19
- 239000000956 alloy Substances 0.000 description 19
- 238000003860 storage Methods 0.000 description 19
- 238000003483 aging Methods 0.000 description 13
- 235000010210 aluminium Nutrition 0.000 description 8
- 229910018464 Al—Mg—Si Inorganic materials 0.000 description 5
- 230000032683 aging Effects 0.000 description 5
- 238000005275 alloying Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000010791 quenching Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000011573 trace mineral Substances 0.000 description 4
- 235000013619 trace mineral Nutrition 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 101000993059 Homo sapiens Hereditary hemochromatosis protein Proteins 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910001094 6061 aluminium alloy Inorganic materials 0.000 description 1
- 229910018594 Si-Cu Inorganic materials 0.000 description 1
- 229910008465 Si—Cu Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001447 compensatory effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
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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
-
- 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
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/06—Alloys containing less than 50% by weight of each constituent containing zinc
-
- 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
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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)
- Cell Electrode Carriers And Collectors (AREA)
- Laminated Bodies (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Conductive Materials (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Heat Treatment Of Steel (AREA)
- Continuous Casting (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Prevention Of Electric Corrosion (AREA)
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Abstract
The invention relates to a hardenable AlMgSi-based aluminum alloy. In order to obtain a recycling-friendly, storage-stable and particularly thermosetting aluminum alloy, it is proposed that said aluminum alloy comprises 0.6 to 1 wt.% of magnesium (Mg), 0.2 to 0.7 wt.% of silicon (Si), 0.16 to 0.7 wt.% of iron (Fe), 0.05 to 0.4 wt.% of copper (Cu), a maximum 0.15 wt.% of manganese (Mn), a maximum of 0.35 wt.% of chromium (Cr), a maximum of 0.2 wt.% of zirconium (Zr), a maximum of 0.25 wt.% of zinc (Zn), a maximum of 0.15 wt.% of titanium (Ti), 0.005 to 0.075 wt.% of tin (Sn) and/or indium (In), and aluminum as the remainder as well as impurities which are unavoidable for production reasons, wherein the ratio of the weight percentages of Si/Fe is less than 2.5 and the content of Si is determined according to the equation wt.% Si = A + [0.3 * (wt.% Fe)], the parameter A being the range from 0.17 to 0.4 wt.%.
Description
Hardenable Al-Mq-Si-based aluminum alloy Field of the invention The invention relates to a hardenable Al-Mg-Si-based aluminum alloy.
Description of the prior art In order to improve the thermosetting capability of A6061 Al-Mg-Si-based aluminum alloy which is age-hardened at room temperature, W02013/124472A1 suggests adding to the solid solution of the aluminum alloy a vacancy-active trace element, namely tin (Sn) and/or indium (In).
In addition, it is known ("Statistical and thermodynamic optimization of trace-element modified Al-Mg-Si-Cu Alloys", Stefan Pogatscher et al.) that certain main and minor alloying elements of the A6061 aluminum alloy reduce the solubility of tin or indium in aluminum alloy, which negatively affects the storage stability at room temperature of the 6xxx aluminum alloys. For example, an increased content of Mg, Si, Cu or Zn in the 6xxx aluminum alloy should reduce the solubility, whereas an increased con-tent of Fe, Ti and Mn increases the solubility. In addition, interaction effects, e.g.
between Si and Mg and/or between Cu and Mg, also play an important role in the solubility of Sn in the aluminum alloy.
However, the main and minor alloying elements can not be arbitrarily varied in their content in the aluminum alloy, because in addition to a desirable high thermosetting capability other mechanical and/or chemical requirements - such as formability, strength, ductility and/or corrosion resistance ¨ need to be met. This requires, for example, high concentrations of main alloying elements in the aluminum alloy in order to form certain hot precipitations.
Description of the prior art In order to improve the thermosetting capability of A6061 Al-Mg-Si-based aluminum alloy which is age-hardened at room temperature, W02013/124472A1 suggests adding to the solid solution of the aluminum alloy a vacancy-active trace element, namely tin (Sn) and/or indium (In).
In addition, it is known ("Statistical and thermodynamic optimization of trace-element modified Al-Mg-Si-Cu Alloys", Stefan Pogatscher et al.) that certain main and minor alloying elements of the A6061 aluminum alloy reduce the solubility of tin or indium in aluminum alloy, which negatively affects the storage stability at room temperature of the 6xxx aluminum alloys. For example, an increased content of Mg, Si, Cu or Zn in the 6xxx aluminum alloy should reduce the solubility, whereas an increased con-tent of Fe, Ti and Mn increases the solubility. In addition, interaction effects, e.g.
between Si and Mg and/or between Cu and Mg, also play an important role in the solubility of Sn in the aluminum alloy.
However, the main and minor alloying elements can not be arbitrarily varied in their content in the aluminum alloy, because in addition to a desirable high thermosetting capability other mechanical and/or chemical requirements - such as formability, strength, ductility and/or corrosion resistance ¨ need to be met. This requires, for example, high concentrations of main alloying elements in the aluminum alloy in order to form certain hot precipitations.
- 2 -In the setting of the composition of an Al-Mg-Si-based aluminum alloy, countercur-rent proportions are therefore usually required for the main and secondary alloying elements - on the one hand, those quantity proportions which are beneficial for the solubility of Sn in the aluminum alloy in order to ensure high storage stability at room temperature, and on the other hand those quantity proportions which ensure high mechanical and/or chemical characteristics or properties of the aluminum alloy, but which usually adversely affect the solubility of Sn.
Summary of the invention It is therefore the object of the invention to modify a hardenable Al-Mg-Si-based aluminum alloy with Sn as a trace element in the composition such that a high me-chanical and chemical property of the aluminum alloy can be combined after hot age-hardening with high storage stability at room temperature. In addition, the alu-minum alloy should be particularly suitable for the use of secondary aluminum.
The invention solves this problem in that the aluminum alloy comprises from 0.6 to 1% by weight of magnesium (Mg), from 0.2 to 0.7% by weight of silicon (Si), from 0.16 to 0.7% by weight of iron (Fe), from 0.05 to 0.4% by weight of copper (Cu), a maximum of 0.15% by weight (or from 0 to 0.15% by weight) of manganese (Mn), a maximum of 0.35% by weight (or from 0 to 0.35% by weight) of chromium (Cr), a maximum of 0.2% by weight (or from 0 to 0.2% by weight) of zirconium (Zr), a max-imum of 0.25% by weight (or from 0 to 0.25% by weight) of zinc (Zn), a maximum of 0.15% by weight (or from 0 to 0.15% by weight) of titanium (Ti), 0.005 to 0.075% by weight of tin (Sn) and/or indium (In), and the remainder aluminum and production-related unavoidable impurities, wherein the ratio of the weight percentages of Si/Fe is less than 2.5 and the content of Si is determined according to the equation wt.%
Si = A + [0.3 * (wt.% Fe)], with the parameter A being in the range of 0.17 to 0.4%
by weight.
, . , . .
Summary of the invention It is therefore the object of the invention to modify a hardenable Al-Mg-Si-based aluminum alloy with Sn as a trace element in the composition such that a high me-chanical and chemical property of the aluminum alloy can be combined after hot age-hardening with high storage stability at room temperature. In addition, the alu-minum alloy should be particularly suitable for the use of secondary aluminum.
The invention solves this problem in that the aluminum alloy comprises from 0.6 to 1% by weight of magnesium (Mg), from 0.2 to 0.7% by weight of silicon (Si), from 0.16 to 0.7% by weight of iron (Fe), from 0.05 to 0.4% by weight of copper (Cu), a maximum of 0.15% by weight (or from 0 to 0.15% by weight) of manganese (Mn), a maximum of 0.35% by weight (or from 0 to 0.35% by weight) of chromium (Cr), a maximum of 0.2% by weight (or from 0 to 0.2% by weight) of zirconium (Zr), a max-imum of 0.25% by weight (or from 0 to 0.25% by weight) of zinc (Zn), a maximum of 0.15% by weight (or from 0 to 0.15% by weight) of titanium (Ti), 0.005 to 0.075% by weight of tin (Sn) and/or indium (In), and the remainder aluminum and production-related unavoidable impurities, wherein the ratio of the weight percentages of Si/Fe is less than 2.5 and the content of Si is determined according to the equation wt.%
Si = A + [0.3 * (wt.% Fe)], with the parameter A being in the range of 0.17 to 0.4%
by weight.
, . , . .
- 3 -As a result of the rule of restricting the Si content to 0.2 to 0.7% by weight and the Fe content to 0.16 to 0.7% by weight and adjusting the Si content to the Fe content, the storage stability and the thermosetting capability of the Al-Mg-Si-aluminum alloy can be particularly favorably influenced if this adjustment meets both the ratio of the weight percentages of Si/Fe less than 2.5 and the equation wt.% Si = A + [0.3 *
(wt.% Fe)], with the parameter A being in the range of 0.17 to 0.4% by weight.
An aluminum alloy tuned so closely in Si and Fe content, which tuning can be rec-ognized, for example, in the hatched area in Fig. 1, can, because of the upper limit of said provision, ensure sufficient solubility of tin and/or indium in the solid solution of the aluminum alloy, which slows down the precipitation behavior during cold age-hardening and thus promotes the storage stability of the aluminum alloy. In addition, due to the lower limit in the tuning, adequate precipitation behavior during hot age-hardening is to be expected, whereby high strength values can be achieved in the hot age-hardening and the aluminum alloy itself can achieve or improve those me-chanical and chemical properties which are known from 6xxx aluminum alloy with a higher content of main and secondary alloy elements.
Surprisingly, however, it has been found that, compared with known 6xxx aluminum alloys, comprising Sn to suppress cold age-hardening, this method can be used to observe a much slower precipitation behavior at room temperature. Although it is known that a comparatively low Si content may be responsible for delayed cold age-hardening, the tuning of the Si content according to the invention, however, leads far beyond these known effects and shows an unusually high storage stability of the aluminum alloys.
According to the invention, therefore, the advantages of a particularly high storage stability at room temperature as well as good thermosetting capability of the alumi-num alloy can be combined.
In addition, this composition according to the invention may also be particularly suit-able for the use of secondary aluminum for this purpose due to the comparatively high Fe content.
(wt.% Fe)], with the parameter A being in the range of 0.17 to 0.4% by weight.
An aluminum alloy tuned so closely in Si and Fe content, which tuning can be rec-ognized, for example, in the hatched area in Fig. 1, can, because of the upper limit of said provision, ensure sufficient solubility of tin and/or indium in the solid solution of the aluminum alloy, which slows down the precipitation behavior during cold age-hardening and thus promotes the storage stability of the aluminum alloy. In addition, due to the lower limit in the tuning, adequate precipitation behavior during hot age-hardening is to be expected, whereby high strength values can be achieved in the hot age-hardening and the aluminum alloy itself can achieve or improve those me-chanical and chemical properties which are known from 6xxx aluminum alloy with a higher content of main and secondary alloy elements.
Surprisingly, however, it has been found that, compared with known 6xxx aluminum alloys, comprising Sn to suppress cold age-hardening, this method can be used to observe a much slower precipitation behavior at room temperature. Although it is known that a comparatively low Si content may be responsible for delayed cold age-hardening, the tuning of the Si content according to the invention, however, leads far beyond these known effects and shows an unusually high storage stability of the aluminum alloys.
According to the invention, therefore, the advantages of a particularly high storage stability at room temperature as well as good thermosetting capability of the alumi-num alloy can be combined.
In addition, this composition according to the invention may also be particularly suit-able for the use of secondary aluminum for this purpose due to the comparatively high Fe content.
- 4 -In general, it is mentioned that the Al-Mg-Si-aluminum alloy can comprise impurities each having a maximum of 0.05% by weight and a total of at most 0.15% by weight.
In addition, it is generally mentioned that maximum weight percentages, such as those found with Mn, Cr, Zr, Zn or titanium, for example, can be considered as start-ing from 0.
For the sake of completeness, it is further mentioned that aluminum or an aluminum alloy, obtained from aluminum scrap, can be understood as the secondary alumi-num.
The storage stability and the thermosetting capability of the aluminum alloy can be further improved when the parameter A is in the range of 0.26 to 0.34% by weight.
As a result of this rule, the solubility of Sn can thus become relatively high and Si has only a low impact on cold age-hardening. This allows an unexpectedly high sta-bility at room temperature. In addition, it can be seen that this alloy set in this way can achieve surprisingly high strength after hot age-hardening, for example by means of heat aging, although this alloy has a comparatively low Si content.
An optimum of storage stability and thermosetting capability may be exhibited when the parameter A is 0.3% by weight.
If the content of Si is determined by the equation wt.% Si = A + [0.3 * (wt.%
Fe)] -wt.% Ti, the components affecting the solubility of Sn can be matched to each other in a further improved manner. In particular, Ti can form phases with Si, which can have a positive influence on the solubility of Sn. The storage stability of the alumi-num alloy is thus further improved.
If the ratio of the weight percentages of Si/Fe is less than 2, by increasing the set-ting of Si by Fe, the content of dissolved Si in the aluminum alloy can be significantly reduced. Thus, the solubility of tin and/or indium in the solid solution of the Al-Mg-Si-aluminum alloy can be improved, which can further increase the storage stability.
. . ,
In addition, it is generally mentioned that maximum weight percentages, such as those found with Mn, Cr, Zr, Zn or titanium, for example, can be considered as start-ing from 0.
For the sake of completeness, it is further mentioned that aluminum or an aluminum alloy, obtained from aluminum scrap, can be understood as the secondary alumi-num.
The storage stability and the thermosetting capability of the aluminum alloy can be further improved when the parameter A is in the range of 0.26 to 0.34% by weight.
As a result of this rule, the solubility of Sn can thus become relatively high and Si has only a low impact on cold age-hardening. This allows an unexpectedly high sta-bility at room temperature. In addition, it can be seen that this alloy set in this way can achieve surprisingly high strength after hot age-hardening, for example by means of heat aging, although this alloy has a comparatively low Si content.
An optimum of storage stability and thermosetting capability may be exhibited when the parameter A is 0.3% by weight.
If the content of Si is determined by the equation wt.% Si = A + [0.3 * (wt.%
Fe)] -wt.% Ti, the components affecting the solubility of Sn can be matched to each other in a further improved manner. In particular, Ti can form phases with Si, which can have a positive influence on the solubility of Sn. The storage stability of the alumi-num alloy is thus further improved.
If the ratio of the weight percentages of Si/Fe is less than 2, by increasing the set-ting of Si by Fe, the content of dissolved Si in the aluminum alloy can be significantly reduced. Thus, the solubility of tin and/or indium in the solid solution of the Al-Mg-Si-aluminum alloy can be improved, which can further increase the storage stability.
. . ,
- 5 -A comparatively high solubility of tin and/or indium in the solid solution of the Al-Mg-Si-aluminum alloy can be achieved when the ratio of the weight percentages of Si/Mg is in the range of 0.3 to 0.9.
If the aluminum alloy has at least 0.25% by weight of copper (Cu), based on this comparatively high Cu content, it is possible to intervene in a compensatory manner with respect to the adverse effects of Mg and Si on the solubility of Sn in the solid solution of Al-Mg-Si-aluminum alloy.
An excellent storage stability of the aluminum alloy can be achieved if it has tin (Sn) in the range of 0.005 to 0.05% by weight in solid solution in the aluminum mixed crystal. In general, it is mentioned that the term "solid solution" may denote a state in which an alloying element is dispersed in a solid matrix.
Preferably, the aluminum alloy belongs to the 6xxx series. Preferably, the aluminum alloy is an EN AW-6061 aluminum alloy.
If the aluminum alloy has at most 0.05% by weight of chromium (Cr) and more than 0.05% by weight of zirconium (Zr), the quenching sensitivity for Sn can be reduced and Sn can also be retained in solid solution in the aluminum mixed crystal at com-paratively low quenching rates. In addition, it is thus possible, even with heavy plates, to achieve optimum storage stability and thermosetting capability.
The aluminum alloy may contain at least 0.02% by weight of chromium (Cr) in order to possibly improve the corrosion behavior.
Detailed description of the preferred embodiments
If the aluminum alloy has at least 0.25% by weight of copper (Cu), based on this comparatively high Cu content, it is possible to intervene in a compensatory manner with respect to the adverse effects of Mg and Si on the solubility of Sn in the solid solution of Al-Mg-Si-aluminum alloy.
An excellent storage stability of the aluminum alloy can be achieved if it has tin (Sn) in the range of 0.005 to 0.05% by weight in solid solution in the aluminum mixed crystal. In general, it is mentioned that the term "solid solution" may denote a state in which an alloying element is dispersed in a solid matrix.
Preferably, the aluminum alloy belongs to the 6xxx series. Preferably, the aluminum alloy is an EN AW-6061 aluminum alloy.
If the aluminum alloy has at most 0.05% by weight of chromium (Cr) and more than 0.05% by weight of zirconium (Zr), the quenching sensitivity for Sn can be reduced and Sn can also be retained in solid solution in the aluminum mixed crystal at com-paratively low quenching rates. In addition, it is thus possible, even with heavy plates, to achieve optimum storage stability and thermosetting capability.
The aluminum alloy may contain at least 0.02% by weight of chromium (Cr) in order to possibly improve the corrosion behavior.
Detailed description of the preferred embodiments
- 6 -To demonstrate the effects achieved, thin sheets of various Al-Mg-Si-based alumi-num alloys (6xxx series) were produced. The compositions of the alloys investigated are listed in Table 1.
Alloys Sn Mg Si Cu Fe Mn Cr Zn Ti 1 0.04 0.8 0.64 0.22 0.47 0.11 0.16 0.05 0.05 2 0.04 0.78 0.43 0.36 0.46 0.11 0.14 0.05 0.06 Table 1: Overview of the investigated alloys in weight percent The aluminum alloy 1 of Table 1 essentially corresponds to a standard alloy after addition of the trace element Sn, wherein it is conceivable to use indium or a combination of Sn and In instead of tin. Alloy 2 represents the composition accord-ing to the invention of the 6xxx series and is comparatively recycling-friendly due to the comparatively high Fe content.
The aluminum alloy 1 is well outside the Si/Fe content tuned according to the inven-tion, which is shown by way of example in Fig. 1. The aluminum alloy 2 is placed substantially centrally in this tuned Si/Fe content.
Both aluminum alloys 1 and 2 were solution-annealed in solid solution, quenched, and cold-hardened by aging at room temperature, and then hot-hardened.
Solution annealing was carried out at a temperature greater than 530 degrees Celsius -quenching at a quench rate greater than 20 degrees Celsius/second. Both alloys and 2 were subjected to a storage time or cold age-hardening of 180 days jdj and 30-minute hot age-hardening at different temperatures. Brinell hardness [HBW]
was determined during cold aging and after hot aging.
With regard to the storage stability, it can be seen from Fig. 2 that the alloy 1 under-goes a comparatively rapidly increasing cold hardening during storage at room tem-perature after only 14 days - which leads disadvantageously to a comparatively high 4 =
Alloys Sn Mg Si Cu Fe Mn Cr Zn Ti 1 0.04 0.8 0.64 0.22 0.47 0.11 0.16 0.05 0.05 2 0.04 0.78 0.43 0.36 0.46 0.11 0.14 0.05 0.06 Table 1: Overview of the investigated alloys in weight percent The aluminum alloy 1 of Table 1 essentially corresponds to a standard alloy after addition of the trace element Sn, wherein it is conceivable to use indium or a combination of Sn and In instead of tin. Alloy 2 represents the composition accord-ing to the invention of the 6xxx series and is comparatively recycling-friendly due to the comparatively high Fe content.
The aluminum alloy 1 is well outside the Si/Fe content tuned according to the inven-tion, which is shown by way of example in Fig. 1. The aluminum alloy 2 is placed substantially centrally in this tuned Si/Fe content.
Both aluminum alloys 1 and 2 were solution-annealed in solid solution, quenched, and cold-hardened by aging at room temperature, and then hot-hardened.
Solution annealing was carried out at a temperature greater than 530 degrees Celsius -quenching at a quench rate greater than 20 degrees Celsius/second. Both alloys and 2 were subjected to a storage time or cold age-hardening of 180 days jdj and 30-minute hot age-hardening at different temperatures. Brinell hardness [HBW]
was determined during cold aging and after hot aging.
With regard to the storage stability, it can be seen from Fig. 2 that the alloy 1 under-goes a comparatively rapidly increasing cold hardening during storage at room tem-perature after only 14 days - which leads disadvantageously to a comparatively high 4 =
- 7 -and increasing Brinell hardness over a longer storage time and has a disadvanta-geous effect on forming before hot age-hardening.
In contrast, alloy 2 shows an onset of cold age-hardening only after approx.180 days, whereby the alloy 2 according to the invention is considered to be particularly resistant to storage. Such a surprisingly high storage stability has not yet been ob-served with any 6xxx alloy. This leads to an unexpected, enormous gain in the ma-nipulation time of the alloy after quenching in a soft state.
In the subsequent hot age-hardening, it can be seen in the comparison of the two alloys according to Fig. 3 that the alloy 2 initially lags behind the alloy 1 at lower ag-ing temperatures in the Brinell hardness. At higher aging temperatures, the Brinell hardness of the alloy 1 can be significantly exceeded.
In contrast, alloy 2 shows an onset of cold age-hardening only after approx.180 days, whereby the alloy 2 according to the invention is considered to be particularly resistant to storage. Such a surprisingly high storage stability has not yet been ob-served with any 6xxx alloy. This leads to an unexpected, enormous gain in the ma-nipulation time of the alloy after quenching in a soft state.
In the subsequent hot age-hardening, it can be seen in the comparison of the two alloys according to Fig. 3 that the alloy 2 initially lags behind the alloy 1 at lower ag-ing temperatures in the Brinell hardness. At higher aging temperatures, the Brinell hardness of the alloy 1 can be significantly exceeded.
Claims (11)
1. A hardenable AI-Mg-Si-based aluminum alloy, comprising from 0.6 to 1% by weight of magnesium (Mg), from 0.2 to 0.7% by weight of silicon (Si), from 0.16 to 0.7% by weight of iron (Fe), from 0.05 to 0.4% by weight of copper (Cu), a maximum of 0.15% by weight of manganese (Mn), a maximum of 0.35% by weight of chromium (Cr), a maximum of 0.2% by weight of zirconium (Zr), a maximum of 0.25% by weight of zinc (Zn), a maximum of 0.15% by weight of titanium (Ti), 0.005 to 0.075% by weight of tin (Sn) and/or indium (In), and the aluminum as the remainder as well as production-related unavoidable impurities, wherein the ratio of the weight percentages of Si/Fe is less than 2.5 and the content of Si is determined according to the equation wt.% Si = A + [0.3 * (wt.% Fe)], with the parameter A being in the range of 0.17 to 0.4% by weight.
2. Aluminum alloy according to claim 1, characterized in that the parameter A is in the range of 0.26 to 0.34% by weight.
3. Aluminum alloy according to claim 1 or 2, characterized in that the parameter A is 0.3% by weight.
4. Aluminum alloy according to claim 1, 2 or 3, characterized in that the content of Si is determined according to the equation wt.% Si = A + [0.3 * (wt.% Fe)] - wt.% Ti.
5. Aluminum alloy according to one of claims 1 to 4, characterized in that the ratio of the weight percent of Si/Fe is less than 2.
6. Aluminum alloy according to one of claims 1 to 5, characterized in that the ratio of the weight percentages of Si/Mg is in the range of 0.3 to 0.9.
7. Aluminum alloy according to one of claims 1 to 6, characterized in that the aluminum alloy has at least 0.25% by weight of copper (Cu).
8. Aluminum alloy according to one of claims 1 to 7, characterized in that the aluminum alloy comprises tin (Sn) in the range of 0.005 to 0.05% by weight in solid solution in the aluminum mixed crystal.
9. Aluminum alloy according to one of claims 1 to 8, characterized in that the aluminum alloy belongs to the 6xxx series.
10. Aluminum alloy according to one of claims 1 to 9, characterized in that the aluminum alloy has a maximum of 0.05% by weight of chromium (Cr) and more than 0.05% by weight of zirconium (Zr).
11. Aluminum alloy according to one of claims 1 to 10, characterized in that the aluminum alloy has at least 0.02% by weight of chromium (Cr).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16152467.3A EP3196324B1 (en) | 2016-01-22 | 2016-01-22 | Curable aluminium alloy on an al-mg-si-basis |
| EP16152467.3 | 2016-01-22 | ||
| PCT/EP2017/051243 WO2017125582A1 (en) | 2016-01-22 | 2017-01-20 | Hardenable almgsi-based aluminum alloy |
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| CA3011631A1 true CA3011631A1 (en) | 2017-07-27 |
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| CA3011631A Pending CA3011631A1 (en) | 2016-01-22 | 2017-01-20 | Hardenable al-mg-si-based aluminum alloy |
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| US (1) | US20190024219A1 (en) |
| EP (2) | EP3196324B1 (en) |
| JP (1) | JP7208005B2 (en) |
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| CN (1) | CN108779522B (en) |
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| TR (1) | TR201814631T1 (en) |
| WO (1) | WO2017125582A1 (en) |
| ZA (1) | ZA201804669B (en) |
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| CN109706351A (en) * | 2017-10-26 | 2019-05-03 | 遵义市吉祥富康门窗有限公司 | A kind of aluminium alloy and preparation method thereof |
| CN108977700B (en) * | 2018-08-20 | 2020-04-17 | 广东润盛科技材料有限公司 | Aluminum alloy plate and preparation method thereof |
| MX2021010903A (en) | 2019-03-13 | 2021-10-01 | Novelis Inc | Age-hardenable and highly formable aluminum alloys, monolithic sheet made therof and clad aluminum alloy product comprising it. |
| CN110951998B (en) * | 2019-11-28 | 2020-12-08 | 辽宁忠旺集团有限公司 | Production process of high-temperature stable 6-series aluminum alloy section |
| CN113737064B (en) * | 2021-08-31 | 2022-04-08 | 华中科技大学 | Al-Mg-Si alloy for high-performance forge piece and preparation method thereof |
| WO2024086068A1 (en) * | 2022-10-20 | 2024-04-25 | Arconic Technologies, Llc | New 6xxx aluminum alloys |
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| JPH07207396A (en) * | 1994-01-20 | 1995-08-08 | Nippon Steel Corp | Aluminum alloy sheet excellent in press formability and baking hardenability for coating |
| US5587029A (en) * | 1994-10-27 | 1996-12-24 | Reynolds Metals Company | Machineable aluminum alloys containing In and Sn and process for producing the same |
| JPH08199276A (en) * | 1995-01-25 | 1996-08-06 | Showa Denko Kk | Aluminum alloy for cold forging |
| US6231809B1 (en) * | 1998-02-20 | 2001-05-15 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Al-Mg-Si aluminum alloy sheet for forming having good surface properties with controlled texture |
| JP4328996B2 (en) * | 1999-06-16 | 2009-09-09 | 日本軽金属株式会社 | Al-Mg-Si aluminum alloy cold forging manufacturing method |
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| JP2002235158A (en) * | 2001-02-05 | 2002-08-23 | Nippon Steel Corp | Method for producing high strength aluminum alloy extrusion shape material having excellent bending workability |
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| JP2004277786A (en) * | 2003-03-14 | 2004-10-07 | Nippon Light Metal Co Ltd | Method for manufacturing heat treatment type aluminum alloy material for cold working superior in machinability |
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| RU2394113C1 (en) * | 2008-11-13 | 2010-07-10 | Общество с ограниченной ответственностью "ИНТЕЛЛ-СЕРВИС" | High-tensile deformed alloy on base of aluminium and item out of this alloy |
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| JP5918187B2 (en) * | 2013-09-06 | 2016-05-18 | 株式会社神戸製鋼所 | Aluminum alloy sheet with excellent bake hardenability |
| CN105518168B (en) * | 2013-09-06 | 2017-07-18 | 株式会社神户制钢所 | Toast the excellent aluminium alloy plate of application hardening |
| JP6005613B2 (en) * | 2013-09-06 | 2016-10-12 | 株式会社神戸製鋼所 | Aluminum alloy sheet with excellent bake hardenability |
| CN104532089B (en) * | 2014-12-26 | 2016-08-24 | 中国石油天然气股份有限公司 | A kind of anti-corrosion alloy composition and device thereof, prepare and apply |
| CN104975209A (en) * | 2015-03-13 | 2015-10-14 | 宝山钢铁股份有限公司 | 6000 series aluminum alloy material with high natural aging stability, aluminum alloy plate and preparing method of aluminum alloy plate |
| CN104975208A (en) * | 2015-03-13 | 2015-10-14 | 宝山钢铁股份有限公司 | 6000-series aluminum alloy material with high strength and elongation, aluminum alloy plate and manufacturing method thereof |
| CN105207596B (en) * | 2015-10-26 | 2018-05-04 | 阿特斯阳光电力集团有限公司 | Novel photovoltaic module |
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| US20190024219A1 (en) | 2019-01-24 |
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| JP7208005B2 (en) | 2023-01-18 |
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| KR102649425B1 (en) | 2024-03-19 |
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