WO2016166779A1 - Aluminum alloy for die casting, and die-cast aluminum alloy using same - Google Patents
Aluminum alloy for die casting, and die-cast aluminum alloy using same Download PDFInfo
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- WO2016166779A1 WO2016166779A1 PCT/JP2015/002086 JP2015002086W WO2016166779A1 WO 2016166779 A1 WO2016166779 A1 WO 2016166779A1 JP 2015002086 W JP2015002086 W JP 2015002086W WO 2016166779 A1 WO2016166779 A1 WO 2016166779A1
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- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- the present invention relates to an aluminum alloy for die casting excellent in mechanical properties and corrosion resistance, and an aluminum alloy die casting using the alloy.
- Aluminum alloys are widely used as component materials in automobiles, industrial machines, aircraft, home appliances, and various other fields because they are lightweight and excellent in formability and mass productivity.
- automotive applications the application of aluminum alloy die castings to bodies and underbody parts has been expanded for the purpose of reducing the weight of the car body and the fuel consumption associated therewith.
- many parts using aluminum alloy have been adopted, while many of these parts are important safety parts, so they have not only mechanical properties such as resistance and ductility. And corrosion resistance that can endure long-term use from the viewpoint of the required service life and the use environment. For this reason, in the case of existing alloys, although the mechanical properties required for such parts can be satisfied, it is beginning to occur that the corrosion resistance can not be satisfied.
- Patent Document 1 As one of the techniques for solving such a problem, for example, as a material suitable for a safety component such as a wheel of a car, Patent Document 1 below has a weight of 9.5 to 11.5. % Silicon, 0.1 to 0.5% by weight magnesium, 0.5 to 0.8% by weight manganese, up to 0.15% by weight iron, up to 0.03% by weight copper, up to 0.10
- a die-casting aluminum alloy is disclosed which comprises by weight zinc, up to 0.15% by weight titanium, the balance being aluminum and 30 to 300 ppm strontium as a permanent atomizing agent. According to this technology, since the content of Cu which corrodes the aluminum alloy by the battery action is suppressed to 0.03% by weight at the maximum, the die-casting aluminum alloy having high corrosion resistance can be provided.
- the main object of the present invention is that although Cu is contained in a proportion capable of exhibiting the effect of improving mechanical properties, the corrosion resistance is not significantly deteriorated and it is suitable for important safety parts of automobiles and the like.
- An object of the present invention is to provide an aluminum alloy for die casting and an aluminum alloy die cast from the alloy.
- the first invention in the present invention is “by weight%, 0.03% ⁇ Cu ⁇ 0.7%, 6.0% ⁇ Si ⁇ 11.0%, 0.15% ⁇ Mg ⁇ 0.50%, 0.05% ⁇ Fe ⁇ 0.6%, 0.05% ⁇ Ti ⁇ 0.25%, Mn ⁇ 0.8%, 0.10% ⁇ Cr ⁇ 0.40%, and the balance is Al It is an aluminum alloy for die-casting characterized by consisting of an unavoidable impurity.
- Cu can be contained in the range of more than 0.03 wt% to 0.7 wt% or less, in addition to enabling the use of recycled raw materials, particularly tensile strength and 0.2% It is possible to improve mechanical properties such as proof stress.
- an aluminum alloy for die-casting which is excellent not only in castability and mechanical properties but also in corrosion resistance by the mutual action of the seven types of elemental components only by containing the predetermined proportions. Can be safely and conveniently manufactured.
- the aluminum alloy for die casting of the present invention it is preferable to add 30 to 200 ppm of at least one selected from Na, Sr and Ca and to add 0.05 to 0.20% by weight of Sb. By so doing, particles of eutectic Si can be made finer, and the toughness and strength of the aluminum alloy can be further improved. It is also preferable to add 1 to 50 ppm of B. By so doing, the crystal grains of the aluminum alloy can be made finer even if the amount of Si is small or the casting method with a slow cooling rate is used, and as a result, the elongation of the aluminum alloy is improved. Can.
- a second invention according to the present invention is an aluminum alloy die cast made by die casting using the aluminum alloy for die casting according to the first invention.
- the aluminum alloy die cast by the die casting aluminum alloy of the present invention can be mass-produced with good castability, and is excellent not only in mechanical properties such as tensile strength and hardness but also in corrosion resistance. Ideal for applications such as
- the aluminum alloy for die casting suitable for important safety parts of automobiles, etc. does not significantly deteriorate the corrosion resistance. And an aluminum alloy die cast from the alloy.
- the aluminum alloy for die casting of the present invention (hereinafter, also simply referred to as “aluminum alloy”) is, by weight, 0.03% ⁇ Cu (copper) ⁇ 0.7%, 6.0% ⁇ Si (silicon) ⁇ 11.0%, 0.15% ⁇ Mg (magnesium) ⁇ 0.50%, 0.05% ⁇ Fe (iron) ⁇ 0.6%, 0.05% ⁇ Ti (titanium) ⁇ 0.25%, It contains Mn (manganese) ⁇ 0.8%, 0.1% ⁇ Cr (chromium) ⁇ 0.4%, and the balance is roughly constituted of Al (aluminum) and unavoidable impurities. The characteristics of each element will be described below.
- Cu copper
- the content ratio of Cu to the weight of the entire aluminum alloy is preferably in the range of more than 0.03% by weight and 0.7% by weight or less as described above. If the content ratio of Cu is 0.03 wt% or less, the above-mentioned mechanical property improvement effect can not be obtained, conversely, if the content ratio of Cu exceeds 0.7 wt%, the corrosion resistance Problems such as a significant decrease in growth, a decrease in growth, an increase in specific gravity, and an increase in raw material costs.
- the content of Cu is preferably in the range of more than 0.03% by weight and 0.2% by weight or less.
- Si silicon is an important element which secures the fluidity at the time of aluminum alloy melting and improves the castability. It is preferable that the content ratio of Si with respect to the weight of the entire aluminum alloy is in the range of 6.0 wt% or more and 11.0 wt% or less as described above. When the content of Si is less than 6.0% by weight, it is difficult to secure the fluidity of the molten metal, and in the case of forming by a general die-cast generally used widely, application to large parts On the other hand, if the content of Si exceeds 11.0% by weight, the elongation of the alloy will be reduced.
- Mg manganesium mainly exists in the form of a solid solution in an Al base material in an aluminum alloy or as Mg 2 Si and imparts yield strength and tensile strength to the aluminum alloy, while containing castable or corrosion resistant due to inclusion of an excessive amount. Is a component that adversely affects It is preferable that the content ratio of Mg with respect to the weight of the entire aluminum alloy is in the range of 0.15 wt% or more and 0.5 wt% or less as described above. If the content ratio of Mg is less than 0.15% by weight, the above-mentioned effects can not be sufficiently obtained, and conversely, if the content ratio of Mg exceeds 0.5% by weight, the elongation of the alloy And corrosion resistance will be reduced.
- Fe iron
- the content of Fe based on the weight of the entire aluminum alloy is preferably in the range of 0.05 to 0.6% by weight as described above. If the Fe content ratio is less than 0.05% by weight, the seizure prevention effect at the time of die casting is not sufficient. Conversely, if the Fe content ratio is more than 0.6% by weight, the above seizure occurs. Although the prevention effect is sufficient, the toughness of the alloy is lowered and the melting temperature is raised to deteriorate the castability.
- Ti titanium
- the content of Ti relative to the weight of the entire aluminum alloy is preferably in the range of 0.05% by weight or more and 0.25% by weight or less. If the content ratio of Ti is less than 0.05% by weight, it is difficult to refine the crystal grains in the aluminum alloy, and conversely, if the content ratio of Ti exceeds 0.25% by weight, This is because the melting of the aluminum alloy becomes difficult, and the possibility of the occurrence of the unmelted part will arise.
- the content ratio of Ti is approximately 0.25% by weight or less as the content ratio of Ti increases. While the tensile strength and 0.2% proof stress of the aluminum alloy were improved, it was found as a new finding that the elongation was hardly affected.
- Mn manganese
- Mn is mainly for preventing seizing between the aluminum alloy and the mold at the time of die casting, similarly to Fe described above. Like Fe, too much content of Mn makes it difficult to melt at an appropriate temperature. Therefore, in the present invention, the content of Mn with respect to the weight of the entire aluminum alloy is suppressed to 0.8% by weight or less.
- the lower limit of the content of Mn is not particularly limited, but in order to exert the above-mentioned anti-seizure effect remarkably, it is preferable to contain Mn in an amount of 0.2% by weight or more.
- Cr chromium
- the content of Cr relative to the weight of the entire aluminum alloy is preferably in the range of 0.1 wt% or more and 0.4 wt% or less as described above. If the content ratio of Cr is less than 0.1% by weight, the above-mentioned effects can not be sufficiently obtained, and conversely, if the content ratio of Cr exceeds 0.4% by weight, further addition is made Even if the amount is increased, the addition effect can not be improved.
- At least one selected from Na (sodium), Sr (strontium), Ca (calcium) and Sb (antimony) may be added as the improvement treatment material.
- the improvement treatment material By adding such an improvement treatment material, particles of eutectic Si can be made finer, and the toughness and strength of the aluminum alloy can be further improved.
- the addition ratio of the improved material to the total weight of the aluminum alloy is 30 to 200 ppm when the improved material is Na, Sr and Ca, and 0.05 to 0.20% by weight when Sb is used. It is preferable that it is a range.
- the addition ratio of the improvement treatment material is less than 30 ppm (0.05% by weight in the case of Sb), it becomes difficult to refine the particles of eutectic Si in the aluminum alloy, conversely, the improvement treatment material
- the addition ratio of is greater than 200 ppm (0.20% by weight in the case of Sb)
- the particles of eutectic Si in the aluminum alloy are sufficiently finely divided, and addition is possible even if the addition amount is further increased It is because the effect does not rise.
- B boron
- B boron
- the proportion of B added to the total weight of the aluminum alloy is preferably in the range of 1 to 50 ppm.
- the addition ratio of B is less than 1 ppm, it is difficult to refine the crystal grains in the aluminum alloy, and conversely, when the addition ratio of B is more than 50 ppm, the crystal grains in the aluminum alloy are sufficient. The effect of addition is not improved even if the amount of addition is further increased.
- the raw materials contained such that the respective elemental components of Al, Cu, Si, Mg, Fe, Ti, Mn and Cr become the above-mentioned predetermined ratio are Prepare (If necessary, add the above-mentioned improved materials etc.).
- the raw material is put into a melting furnace such as a forging furnace-containing melting furnace or a closed melting furnace to melt these materials.
- the molten raw material thus melted, that is, the molten metal of the aluminum alloy is subjected to a purification treatment such as dehydrogenation treatment and removal treatment, if necessary.
- the refined molten metal is poured into a predetermined mold or the like and solidified to form a molten metal of an aluminum alloy into an alloy base metal ingot or the like.
- solution treatment, aging treatment and the like are performed as needed.
- the mechanical properties of the aluminum alloy casting can be improved by subjecting the aluminum alloy die cast to solution treatment, aging treatment and the like.
- the mechanical properties (specifically, tensile strength, elongation, 0.2% proof stress) in the following various alloys were measured by the following methods. That is, using an ordinary die casting machine with a clamping force of 135 tons (DC 135EL manufactured by Toshiba Machine Co., Ltd.), die casting is performed at an injection speed of 1.0 m / s and a casting pressure of 60 MPa. ASTM (American Society for Testing and Material) Round bar test piece conforming to the standard was prepared.
- the tensile strength, elongation and 0.2% proof stress of the as-cast round bar test pieces were measured using a universal tester (AG-IS 100 kN) manufactured by Shimadzu Corporation.
- alloy components of various alloys were measured using a solid-state emission spectrometer (Thermo Scientific ARL 4460 manufactured by Thermo Fisher Scientific Co., Ltd.).
- the corrosion resistance was evaluated by a (neutral) salt spray test in accordance with Japanese Industrial Standard JIS Z2371. At that time, the test was carried out using a Cass tester CASSER-ISO-3 manufactured by Suga Test Instruments Co., Ltd.
- Table 1 shows that an alloy component other than Cu is adjusted to be a certain ratio within the range of the present invention, and an aluminum alloy for die casting manufactured by changing the content ratio of Cu. It shows the component composition and each mechanical property (tensile strength, elongation, 0.2% proof stress).
- Corrosion resistance improvement effect by inclusion of Cr Table 2 is a table showing the relationship between the corrosion resistance and the composition of each aluminum alloy according to the casting method.
- the die-cast ones in Table 2 were cast by the same method as the sample used for the above-mentioned mechanical property measurement.
- the aluminum alloy adjusted to predetermined components is poured into a mold and gravity casting is performed, and thereafter a sample for salt water spray test in accordance with JIS Z 2371 similar to die casting (corrosion resistance They were processed into evaluation test pieces and subjected to a salt spray test.
- the alloys 15 to 20, 26 and 27 in Table 2 have alloy compositions within the scope of the present invention, ie, example alloys.
- Table 3 shows that aluminum alloy components for die-casting manufactured by adjusting the alloy components other than Ti to a certain ratio within the scope of the present invention and changing the content ratio of Ti It shows the component composition and each mechanical property (tensile strength, elongation, 0.2% proof stress).
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Abstract
Provided is an aluminum alloy for die casting, which despite containing Cu in a proportion such that improved mechanical strength is achieved, experiences no appreciable loss of corrosion resistance, and is suitable for critical safety components of automobiles and the like, and a die cast aluminum alloy die-cast from this alloy. Specifically, the present invention provides an aluminum alloy for die casting, characterized by containing, in wt%, 0.03% < Cu ≤ 0.7%, 6.0% < Si ≤ 11.0%, 0.15% ≤ Mg ≤ 0.50%, 0.05% ≤ Fe ≤ 0.6%, 0.05% ≤ Ti ≤ 0.25%, Mn ≤ 0.8%, and 0.10% ≤ Cr ≤ 0.40%, the remainder being Al and unavoidable impurities.
Description
本発明は、機械的特性と耐食性とに優れたダイカスト用アルミニウム合金および当該合金を利用したアルミニウム合金ダイカストに関する。
The present invention relates to an aluminum alloy for die casting excellent in mechanical properties and corrosion resistance, and an aluminum alloy die casting using the alloy.
アルミニウム合金は、軽量であると共に、成形性や量産性に優れることから、自動車や産業機械、航空機、家庭電化製品その他各種分野において、その構成部品素材として広く使用されている。
このうち、自動車用途においては、車体の軽量化やそれに伴う省燃費を目的に、ボディや足回り部品などへのアルミニウム合金ダイカストの適用が拡大している。このように近年、アルミニウム合金を用いた部品が数多く採用されて来ているが、その一方で、これらの部品の多くは重要保安部品であるため、耐力や延性と言った機械的性質のみならず、必要耐用年数や使用環境などの観点から、長期間の使用に耐え得るだけの耐食性が要求される。このため、既存合金では、かかる部品に要求される機械的特性は充足できるものの、耐食性を満足できない事態が生じ始めている。 Aluminum alloys are widely used as component materials in automobiles, industrial machines, aircraft, home appliances, and various other fields because they are lightweight and excellent in formability and mass productivity.
Among these, in automotive applications, the application of aluminum alloy die castings to bodies and underbody parts has been expanded for the purpose of reducing the weight of the car body and the fuel consumption associated therewith. Thus, in recent years, many parts using aluminum alloy have been adopted, while many of these parts are important safety parts, so they have not only mechanical properties such as resistance and ductility. And corrosion resistance that can endure long-term use from the viewpoint of the required service life and the use environment. For this reason, in the case of existing alloys, although the mechanical properties required for such parts can be satisfied, it is beginning to occur that the corrosion resistance can not be satisfied.
このうち、自動車用途においては、車体の軽量化やそれに伴う省燃費を目的に、ボディや足回り部品などへのアルミニウム合金ダイカストの適用が拡大している。このように近年、アルミニウム合金を用いた部品が数多く採用されて来ているが、その一方で、これらの部品の多くは重要保安部品であるため、耐力や延性と言った機械的性質のみならず、必要耐用年数や使用環境などの観点から、長期間の使用に耐え得るだけの耐食性が要求される。このため、既存合金では、かかる部品に要求される機械的特性は充足できるものの、耐食性を満足できない事態が生じ始めている。 Aluminum alloys are widely used as component materials in automobiles, industrial machines, aircraft, home appliances, and various other fields because they are lightweight and excellent in formability and mass productivity.
Among these, in automotive applications, the application of aluminum alloy die castings to bodies and underbody parts has been expanded for the purpose of reducing the weight of the car body and the fuel consumption associated therewith. Thus, in recent years, many parts using aluminum alloy have been adopted, while many of these parts are important safety parts, so they have not only mechanical properties such as resistance and ductility. And corrosion resistance that can endure long-term use from the viewpoint of the required service life and the use environment. For this reason, in the case of existing alloys, although the mechanical properties required for such parts can be satisfied, it is beginning to occur that the corrosion resistance can not be satisfied.
そこで、そのような問題を解決する技術の一つとして、例えば、下記の特許文献１には、自動車のホイール（車輪）などの安全構成要素に好適な材料として、９．５～１１．５重量％の珪素，０．１～０．５重量％のマグネシウム，０．５～０．８重量％のマンガン，最大０．１５重量％の鉄，最大０．０３重量％の銅，最大０．１０重量％の亜鉛，最大０．１５重量％のチタンを含み、残部がアルミニウム及び永続的微粒化剤としての３０～３００ｐｐｍのストロンチウムで構成されたダイカスト用アルミニウム合金が開示されている。
この技術によれば、電池作用によってアルミニウム合金を腐食させるＣｕの含有割合を最大で０．０３重量％に抑えているので、高い耐食性を有するダイカスト用アルミニウム合金を提供することができる。 Therefore, as one of the techniques for solving such a problem, for example, as a material suitable for a safety component such as a wheel of a car, Patent Document 1 below has a weight of 9.5 to 11.5. % Silicon, 0.1 to 0.5% by weight magnesium, 0.5 to 0.8% by weight manganese, up to 0.15% by weight iron, up to 0.03% by weight copper, up to 0.10 A die-casting aluminum alloy is disclosed which comprises by weight zinc, up to 0.15% by weight titanium, the balance being aluminum and 30 to 300 ppm strontium as a permanent atomizing agent.
According to this technology, since the content of Cu which corrodes the aluminum alloy by the battery action is suppressed to 0.03% by weight at the maximum, the die-casting aluminum alloy having high corrosion resistance can be provided.
この技術によれば、電池作用によってアルミニウム合金を腐食させるＣｕの含有割合を最大で０．０３重量％に抑えているので、高い耐食性を有するダイカスト用アルミニウム合金を提供することができる。 Therefore, as one of the techniques for solving such a problem, for example, as a material suitable for a safety component such as a wheel of a car, Patent Document 1 below has a weight of 9.5 to 11.5. % Silicon, 0.1 to 0.5% by weight magnesium, 0.5 to 0.8% by weight manganese, up to 0.15% by weight iron, up to 0.03% by weight copper, up to 0.10 A die-casting aluminum alloy is disclosed which comprises by weight zinc, up to 0.15% by weight titanium, the balance being aluminum and 30 to 300 ppm strontium as a permanent atomizing agent.
According to this technology, since the content of Cu which corrodes the aluminum alloy by the battery action is suppressed to 0.03% by weight at the maximum, the die-casting aluminum alloy having high corrosion resistance can be provided.
しかしながら、耐食性を向上させるため、上述のようにＣｕの含有割合を制限すれば、実質的にスクラップ原料の使用が不可能となり、アルミニウム合金を経済的に製造できなくなるばかりでなく、循環型社会を構築する上での律速となる。また、Ｃｕはアルミニウム合金に対して引張強さや０．２％耐力と言った機械的性質を向上させる効果を有しているが、Ｃｕの含有割合を０．０３重量％以下に制限すれば、かかる効果も期待できなくなる。
それゆえに、この発明の主たる課題は、機械的性質の向上効果を発揮できる割合でＣｕを含有しているにもかかわらず、耐食性を著しく悪化させることがなく、自動車の重要保安部品などに好適なダイカスト用アルミニウム合金と、当該合金でダイカストされたアルミニウム合金ダイカストとを提供することである。 However, if the content of Cu is limited as described above in order to improve the corrosion resistance, it is practically impossible to use scrap raw materials, and it becomes impossible not only to be able to economically manufacture aluminum alloys but also to promote a recycling society. It becomes rate-limiting in construction. Also, Cu has an effect of improving mechanical properties such as tensile strength and 0.2% proof stress with respect to aluminum alloy, but if the content ratio of Cu is limited to 0.03% by weight or less, Such effects can not be expected either.
Therefore, the main object of the present invention is that although Cu is contained in a proportion capable of exhibiting the effect of improving mechanical properties, the corrosion resistance is not significantly deteriorated and it is suitable for important safety parts of automobiles and the like. An object of the present invention is to provide an aluminum alloy for die casting and an aluminum alloy die cast from the alloy.
それゆえに、この発明の主たる課題は、機械的性質の向上効果を発揮できる割合でＣｕを含有しているにもかかわらず、耐食性を著しく悪化させることがなく、自動車の重要保安部品などに好適なダイカスト用アルミニウム合金と、当該合金でダイカストされたアルミニウム合金ダイカストとを提供することである。 However, if the content of Cu is limited as described above in order to improve the corrosion resistance, it is practically impossible to use scrap raw materials, and it becomes impossible not only to be able to economically manufacture aluminum alloys but also to promote a recycling society. It becomes rate-limiting in construction. Also, Cu has an effect of improving mechanical properties such as tensile strength and 0.2% proof stress with respect to aluminum alloy, but if the content ratio of Cu is limited to 0.03% by weight or less, Such effects can not be expected either.
Therefore, the main object of the present invention is that although Cu is contained in a proportion capable of exhibiting the effect of improving mechanical properties, the corrosion resistance is not significantly deteriorated and it is suitable for important safety parts of automobiles and the like. An object of the present invention is to provide an aluminum alloy for die casting and an aluminum alloy die cast from the alloy.
本発明における第１の発明は、「重量％で、０．０３％＜Ｃｕ≦０．７％、６．０％＜Ｓｉ≦１１．０％、０．１５％≦Ｍｇ≦０．５０％、０．０５％≦Ｆｅ≦０．６％、０．０５％≦Ｔｉ≦０．２５％、Ｍｎ≦０．８％、０．１０％≦Ｃｒ≦０．４０％を含有し、残部がＡｌと不可避不純物とからなる」ことを特徴とするダイカスト用アルミニウム合金である。
この発明では、Ｃｕを０．０３重量％超から０．７重量％以下の範囲内で含有させることができるので、リサイクル原料の使用が可能となるのに加え、特に引張強さや０．２％耐力と言った機械的性質を向上させることができる。また、上記範囲内でのＣｕの含有に併せて、Ｃｒを０．１０重量％以上で且つ０．４０重量％以下含有するようにしているので、耐食性の悪化を防止することができる。
以上のように、本発明では、７種類の元素成分を所定の割合で含有させるだけで、それらの相互的作用により、鋳造性や機械的性質のみならず、耐食性にも優れたダイカスト用アルミニウム合金のインゴットを安全且つ簡便に製造することができる。 The first invention in the present invention is “by weight%, 0.03% <Cu ≦ 0.7%, 6.0% <Si ≦ 11.0%, 0.15% ≦ Mg ≦ 0.50%, 0.05% ≦ Fe ≦ 0.6%, 0.05% ≦ Ti ≦ 0.25%, Mn ≦ 0.8%, 0.10% ≦ Cr ≦ 0.40%, and the balance is Al It is an aluminum alloy for die-casting characterized by consisting of an unavoidable impurity.
In this invention, since Cu can be contained in the range of more than 0.03 wt% to 0.7 wt% or less, in addition to enabling the use of recycled raw materials, particularly tensile strength and 0.2% It is possible to improve mechanical properties such as proof stress. Further, since Cr is contained in an amount of 0.10% by weight or more and 0.40% by weight or less in combination with the content of Cu within the above range, the deterioration of the corrosion resistance can be prevented.
As described above, in the present invention, an aluminum alloy for die-casting which is excellent not only in castability and mechanical properties but also in corrosion resistance by the mutual action of the seven types of elemental components only by containing the predetermined proportions. Can be safely and conveniently manufactured.
この発明では、Ｃｕを０．０３重量％超から０．７重量％以下の範囲内で含有させることができるので、リサイクル原料の使用が可能となるのに加え、特に引張強さや０．２％耐力と言った機械的性質を向上させることができる。また、上記範囲内でのＣｕの含有に併せて、Ｃｒを０．１０重量％以上で且つ０．４０重量％以下含有するようにしているので、耐食性の悪化を防止することができる。
以上のように、本発明では、７種類の元素成分を所定の割合で含有させるだけで、それらの相互的作用により、鋳造性や機械的性質のみならず、耐食性にも優れたダイカスト用アルミニウム合金のインゴットを安全且つ簡便に製造することができる。 The first invention in the present invention is “by weight%, 0.03% <Cu ≦ 0.7%, 6.0% <Si ≦ 11.0%, 0.15% ≦ Mg ≦ 0.50%, 0.05% ≦ Fe ≦ 0.6%, 0.05% ≦ Ti ≦ 0.25%, Mn ≦ 0.8%, 0.10% ≦ Cr ≦ 0.40%, and the balance is Al It is an aluminum alloy for die-casting characterized by consisting of an unavoidable impurity.
In this invention, since Cu can be contained in the range of more than 0.03 wt% to 0.7 wt% or less, in addition to enabling the use of recycled raw materials, particularly tensile strength and 0.2% It is possible to improve mechanical properties such as proof stress. Further, since Cr is contained in an amount of 0.10% by weight or more and 0.40% by weight or less in combination with the content of Cu within the above range, the deterioration of the corrosion resistance can be prevented.
As described above, in the present invention, an aluminum alloy for die-casting which is excellent not only in castability and mechanical properties but also in corrosion resistance by the mutual action of the seven types of elemental components only by containing the predetermined proportions. Can be safely and conveniently manufactured.
なお、本発明のダイカスト用アルミニウム合金では、Ｎａ，ＳｒおよびＣａから選ばれる少なくとも１種を３０～２００ｐｐｍ添加することや、Ｓｂを０．０５～０．２０重量％添加するのが好ましい。こうすることにより、共晶Ｓｉの粒子を細かくすることができ、アルミニウム合金の靱性や強度をより一層向上させることができる。
また、Ｂを１～５０ｐｐｍ添加することも好ましい。こうすることにより、特にＳｉ量が少ない場合や冷却速度の遅い鋳造方法を用いる場合であってもアルミニウム合金の結晶粒を微細化させることができ、その結果、当該アルミニウム合金の伸びを向上させることができる。 In the aluminum alloy for die casting of the present invention, it is preferable to add 30 to 200 ppm of at least one selected from Na, Sr and Ca and to add 0.05 to 0.20% by weight of Sb. By so doing, particles of eutectic Si can be made finer, and the toughness and strength of the aluminum alloy can be further improved.
It is also preferable to add 1 to 50 ppm of B. By so doing, the crystal grains of the aluminum alloy can be made finer even if the amount of Si is small or the casting method with a slow cooling rate is used, and as a result, the elongation of the aluminum alloy is improved. Can.
また、Ｂを１～５０ｐｐｍ添加することも好ましい。こうすることにより、特にＳｉ量が少ない場合や冷却速度の遅い鋳造方法を用いる場合であってもアルミニウム合金の結晶粒を微細化させることができ、その結果、当該アルミニウム合金の伸びを向上させることができる。 In the aluminum alloy for die casting of the present invention, it is preferable to add 30 to 200 ppm of at least one selected from Na, Sr and Ca and to add 0.05 to 0.20% by weight of Sb. By so doing, particles of eutectic Si can be made finer, and the toughness and strength of the aluminum alloy can be further improved.
It is also preferable to add 1 to 50 ppm of B. By so doing, the crystal grains of the aluminum alloy can be made finer even if the amount of Si is small or the casting method with a slow cooling rate is used, and as a result, the elongation of the aluminum alloy is improved. Can.
本発明における第２の発明は、上記第１の発明に記載のダイカスト用アルミニウム合金でダイカストされたことを特徴とするアルミニウム合金ダイカストである。
本発明のダイカスト用アルミニウム合金でダイカストされたアルミニウム合金ダイカストは、鋳造性よく量産できると共に、引張強さや硬さと言った機械的特性のみならず耐食性にも優れているため、例えば自動車の重要保安部品などの用途に最適である。 A second invention according to the present invention is an aluminum alloy die cast made by die casting using the aluminum alloy for die casting according to the first invention.
The aluminum alloy die cast by the die casting aluminum alloy of the present invention can be mass-produced with good castability, and is excellent not only in mechanical properties such as tensile strength and hardness but also in corrosion resistance. Ideal for applications such as
本発明のダイカスト用アルミニウム合金でダイカストされたアルミニウム合金ダイカストは、鋳造性よく量産できると共に、引張強さや硬さと言った機械的特性のみならず耐食性にも優れているため、例えば自動車の重要保安部品などの用途に最適である。 A second invention according to the present invention is an aluminum alloy die cast made by die casting using the aluminum alloy for die casting according to the first invention.
The aluminum alloy die cast by the die casting aluminum alloy of the present invention can be mass-produced with good castability, and is excellent not only in mechanical properties such as tensile strength and hardness but also in corrosion resistance. Ideal for applications such as
本発明によれば、機械的性質の向上効果を発揮できる割合でＣｕを含有しているにもかかわらず、耐食性を著しく悪化させることがなく、自動車の重要保安部品などに好適なダイカスト用アルミニウム合金と、当該合金でダイカストされたアルミニウム合金ダイカストとを提供することができる。
According to the present invention, although containing Cu in a proportion capable of exhibiting the effect of improving mechanical properties, the aluminum alloy for die casting suitable for important safety parts of automobiles, etc., does not significantly deteriorate the corrosion resistance. And an aluminum alloy die cast from the alloy.
以下、本発明の実施の形態について具体例を示しながら詳述する。
本発明のダイカスト用アルミニウム合金(以下、単に「アルミニウム合金」とも云う。)は、重量％で、０．０３％＜Ｃｕ(銅)≦０．７％、６．０％＜Ｓｉ(ケイ素)≦１１．０％、０．１５％≦Ｍｇ(マグネシウム)≦０．５０％、０．０５％≦Ｆｅ(鉄)≦０．６％、０．０５％≦Ｔｉ(チタン)≦０．２５％、Ｍｎ(マンガン)≦０．８％、０．１％≦Ｃｒ(クロム)≦０．４％を含有し、残部がＡｌ(アルミニウム)と不可避不純物とで大略構成されている。以下、各元素の特性について説明する。 Hereinafter, embodiments of the present invention will be described in detail by way of specific examples.
The aluminum alloy for die casting of the present invention (hereinafter, also simply referred to as “aluminum alloy”) is, by weight, 0.03% <Cu (copper) ≦ 0.7%, 6.0% <Si (silicon) ≦ 11.0%, 0.15% ≦ Mg (magnesium) ≦ 0.50%, 0.05% ≦ Fe (iron) ≦ 0.6%, 0.05% ≦ Ti (titanium) ≦ 0.25%, It contains Mn (manganese) ≦ 0.8%, 0.1% ≦ Cr (chromium) ≦ 0.4%, and the balance is roughly constituted of Al (aluminum) and unavoidable impurities. The characteristics of each element will be described below.
本発明のダイカスト用アルミニウム合金(以下、単に「アルミニウム合金」とも云う。)は、重量％で、０．０３％＜Ｃｕ(銅)≦０．７％、６．０％＜Ｓｉ(ケイ素)≦１１．０％、０．１５％≦Ｍｇ(マグネシウム)≦０．５０％、０．０５％≦Ｆｅ(鉄)≦０．６％、０．０５％≦Ｔｉ(チタン)≦０．２５％、Ｍｎ(マンガン)≦０．８％、０．１％≦Ｃｒ(クロム)≦０．４％を含有し、残部がＡｌ(アルミニウム)と不可避不純物とで大略構成されている。以下、各元素の特性について説明する。 Hereinafter, embodiments of the present invention will be described in detail by way of specific examples.
The aluminum alloy for die casting of the present invention (hereinafter, also simply referred to as “aluminum alloy”) is, by weight, 0.03% <Cu (copper) ≦ 0.7%, 6.0% <Si (silicon) ≦ 11.0%, 0.15% ≦ Mg (magnesium) ≦ 0.50%, 0.05% ≦ Fe (iron) ≦ 0.6%, 0.05% ≦ Ti (titanium) ≦ 0.25%, It contains Mn (manganese) ≦ 0.8%, 0.1% ≦ Cr (chromium) ≦ 0.4%, and the balance is roughly constituted of Al (aluminum) and unavoidable impurities. The characteristics of each element will be described below.
Ｃｕ(銅)は、アルミニウム合金の耐摩耗性や機械的強度や硬さを向上させるために重要な元素である。
アルミニウム合金全体の重量に対するＣｕの含有割合は、上述したように０．０３重量％超で且つ０．７重量％以下の範囲内であることが好ましい。Ｃｕの含有割合が０．０３重量％以下の場合には、上述の機械的性質改善効果を得ることができなくなり、逆に、Ｃｕの含有割合が０．７重量％を超える場合には、耐食性の著しい低下、伸びの低下、比重の増大、原材料コストの増加と言った問題が生じるようになるからである。
なお、得られるアルミニウム合金に特に高い耐食性が必要な場合には、このＣｕの含有割合を０．０３重量％超～０．２重量％以下の範囲内にするのが好ましい。 Cu (copper) is an important element for improving the wear resistance, mechanical strength and hardness of aluminum alloys.
The content ratio of Cu to the weight of the entire aluminum alloy is preferably in the range of more than 0.03% by weight and 0.7% by weight or less as described above. If the content ratio of Cu is 0.03 wt% or less, the above-mentioned mechanical property improvement effect can not be obtained, conversely, if the content ratio of Cu exceeds 0.7 wt%, the corrosion resistance Problems such as a significant decrease in growth, a decrease in growth, an increase in specific gravity, and an increase in raw material costs.
When a particularly high corrosion resistance is required for the obtained aluminum alloy, the content of Cu is preferably in the range of more than 0.03% by weight and 0.2% by weight or less.
アルミニウム合金全体の重量に対するＣｕの含有割合は、上述したように０．０３重量％超で且つ０．７重量％以下の範囲内であることが好ましい。Ｃｕの含有割合が０．０３重量％以下の場合には、上述の機械的性質改善効果を得ることができなくなり、逆に、Ｃｕの含有割合が０．７重量％を超える場合には、耐食性の著しい低下、伸びの低下、比重の増大、原材料コストの増加と言った問題が生じるようになるからである。
なお、得られるアルミニウム合金に特に高い耐食性が必要な場合には、このＣｕの含有割合を０．０３重量％超～０．２重量％以下の範囲内にするのが好ましい。 Cu (copper) is an important element for improving the wear resistance, mechanical strength and hardness of aluminum alloys.
The content ratio of Cu to the weight of the entire aluminum alloy is preferably in the range of more than 0.03% by weight and 0.7% by weight or less as described above. If the content ratio of Cu is 0.03 wt% or less, the above-mentioned mechanical property improvement effect can not be obtained, conversely, if the content ratio of Cu exceeds 0.7 wt%, the corrosion resistance Problems such as a significant decrease in growth, a decrease in growth, an increase in specific gravity, and an increase in raw material costs.
When a particularly high corrosion resistance is required for the obtained aluminum alloy, the content of Cu is preferably in the range of more than 0.03% by weight and 0.2% by weight or less.
Ｓｉ（ケイ素）は、アルミニウム合金溶融時における流動性の確保し、鋳造性を向上させる重要な元素である。
アルミニウム合金全体の重量に対するＳｉの含有割合は、上述したように６．０重量％以上で且つ１１．０重量％以下の範囲内であることが好ましい。Ｓｉの含有割合が６.０重量％未満の場合には、溶湯の流動性を確保することが難しく、一般的に多用されている通常のダイカストでの成形を考えた場合、大型部品への適用の妨げになり、逆に、Ｓｉの含有割合が１１．０重量％を超える場合には、合金の伸びが低下するようになるからである。 Si (silicon) is an important element which secures the fluidity at the time of aluminum alloy melting and improves the castability.
It is preferable that the content ratio of Si with respect to the weight of the entire aluminum alloy is in the range of 6.0 wt% or more and 11.0 wt% or less as described above. When the content of Si is less than 6.0% by weight, it is difficult to secure the fluidity of the molten metal, and in the case of forming by a general die-cast generally used widely, application to large parts On the other hand, if the content of Si exceeds 11.0% by weight, the elongation of the alloy will be reduced.
アルミニウム合金全体の重量に対するＳｉの含有割合は、上述したように６．０重量％以上で且つ１１．０重量％以下の範囲内であることが好ましい。Ｓｉの含有割合が６.０重量％未満の場合には、溶湯の流動性を確保することが難しく、一般的に多用されている通常のダイカストでの成形を考えた場合、大型部品への適用の妨げになり、逆に、Ｓｉの含有割合が１１．０重量％を超える場合には、合金の伸びが低下するようになるからである。 Si (silicon) is an important element which secures the fluidity at the time of aluminum alloy melting and improves the castability.
It is preferable that the content ratio of Si with respect to the weight of the entire aluminum alloy is in the range of 6.0 wt% or more and 11.0 wt% or less as described above. When the content of Si is less than 6.0% by weight, it is difficult to secure the fluidity of the molten metal, and in the case of forming by a general die-cast generally used widely, application to large parts On the other hand, if the content of Si exceeds 11.0% by weight, the elongation of the alloy will be reduced.
Ｍｇ（マグネシウム）は、主としてアルミニウム合金中のＡｌ母材に固溶した状態又はＭｇ２Ｓｉとして存在し、アルミニウム合金に耐力および引張強さを付与する一方で、過大量の含有により鋳造性や耐食性に悪影響を及ぼす成分である。
アルミニウム合金全体の重量に対するＭｇの含有割合は、上述したように０．１５重量％以上で且つ０．５重量％以下の範囲であることが好ましい。Ｍｇの含有割合が０．１５重量％未満の場合には、上述の効果を十分に得ることができなくなり、逆に、Ｍｇの含有割合が０．５重量％を超える場合には、合金の伸びや耐食性が低下するようになるからである。 Mg (magnesium) mainly exists in the form of a solid solution in an Al base material in an aluminum alloy or as Mg 2 Si and imparts yield strength and tensile strength to the aluminum alloy, while containing castable or corrosion resistant due to inclusion of an excessive amount. Is a component that adversely affects
It is preferable that the content ratio of Mg with respect to the weight of the entire aluminum alloy is in the range of 0.15 wt% or more and 0.5 wt% or less as described above. If the content ratio of Mg is less than 0.15% by weight, the above-mentioned effects can not be sufficiently obtained, and conversely, if the content ratio of Mg exceeds 0.5% by weight, the elongation of the alloy And corrosion resistance will be reduced.
アルミニウム合金全体の重量に対するＭｇの含有割合は、上述したように０．１５重量％以上で且つ０．５重量％以下の範囲であることが好ましい。Ｍｇの含有割合が０．１５重量％未満の場合には、上述の効果を十分に得ることができなくなり、逆に、Ｍｇの含有割合が０．５重量％を超える場合には、合金の伸びや耐食性が低下するようになるからである。 Mg (magnesium) mainly exists in the form of a solid solution in an Al base material in an aluminum alloy or as Mg 2 Si and imparts yield strength and tensile strength to the aluminum alloy, while containing castable or corrosion resistant due to inclusion of an excessive amount. Is a component that adversely affects
It is preferable that the content ratio of Mg with respect to the weight of the entire aluminum alloy is in the range of 0.15 wt% or more and 0.5 wt% or less as described above. If the content ratio of Mg is less than 0.15% by weight, the above-mentioned effects can not be sufficiently obtained, and conversely, if the content ratio of Mg exceeds 0.5% by weight, the elongation of the alloy And corrosion resistance will be reduced.
Ｆｅ（鉄）は、ダイカスト時の焼付き防止効果を有することが知られている。しかしながら、このＦｅは、Ａｌ-Ｓｉ-Ｆｅからなる針状晶を晶出し、アルミニウム合金の靱性を低下させると共に、大量に添加すると適温での溶解を困難にする。
アルミニウム合金全体の重量に対するＦｅの含有割合は、上述したように０．０５～０．６重量％の範囲内であることが好ましい。Ｆｅの含有割合が０．０５重量％未満の場合には、ダイカスト時の焼付き防止効果が十分ではなく、逆に、Ｆｅの含有割合が０．６重量％より多い場合にも、上記焼付き防止効果は十分なものになるが、当該合金の靱性が低下すると共に溶解温度が上昇して鋳造性が悪化するようになるからである。 Fe (iron) is known to have a seizure prevention effect at the time of die casting. However, this Fe crystallizes needle-like crystals consisting of Al-Si-Fe, and reduces the toughness of the aluminum alloy, and when added in large amounts, makes it difficult to melt at an appropriate temperature.
The content of Fe based on the weight of the entire aluminum alloy is preferably in the range of 0.05 to 0.6% by weight as described above. If the Fe content ratio is less than 0.05% by weight, the seizure prevention effect at the time of die casting is not sufficient. Conversely, if the Fe content ratio is more than 0.6% by weight, the above seizure occurs. Although the prevention effect is sufficient, the toughness of the alloy is lowered and the melting temperature is raised to deteriorate the castability.
アルミニウム合金全体の重量に対するＦｅの含有割合は、上述したように０．０５～０．６重量％の範囲内であることが好ましい。Ｆｅの含有割合が０．０５重量％未満の場合には、ダイカスト時の焼付き防止効果が十分ではなく、逆に、Ｆｅの含有割合が０．６重量％より多い場合にも、上記焼付き防止効果は十分なものになるが、当該合金の靱性が低下すると共に溶解温度が上昇して鋳造性が悪化するようになるからである。 Fe (iron) is known to have a seizure prevention effect at the time of die casting. However, this Fe crystallizes needle-like crystals consisting of Al-Si-Fe, and reduces the toughness of the aluminum alloy, and when added in large amounts, makes it difficult to melt at an appropriate temperature.
The content of Fe based on the weight of the entire aluminum alloy is preferably in the range of 0.05 to 0.6% by weight as described above. If the Fe content ratio is less than 0.05% by weight, the seizure prevention effect at the time of die casting is not sufficient. Conversely, if the Fe content ratio is more than 0.6% by weight, the above seizure occurs. Although the prevention effect is sufficient, the toughness of the alloy is lowered and the melting temperature is raised to deteriorate the castability.
Ｔｉ（チタン）は、結晶粒を微細化させる効果を有しており、一般的には鋳造割れの抑制や機械的性質のうち特に伸びを向上させることができる元素であると言われている。
アルミニウム合金全体の重量に対するＴｉの含有割合は、０．０５重量％以上で且つ０．２５重量％以下の範囲内であることが好ましい。Ｔｉの含有割合が０．０５重量％未満の場合には、アルミニウム合金中の結晶粒を微細化するのが困難となり、逆に、Ｔｉの含有割合が０．２５重量％を超える場合には、アルミニウム合金の溶解が難しくなり、溶け残りの生じる可能性が出てくるからである。
なお、本発明成分のアルミニウム合金では、後述するように、その成分組成の相互的作用により、Ｔｉの含有割合が概ね０．２５重量％以下の範囲内において、Ｔｉの含有割合が増えるに伴って、アルミニウム合金の引張強さ及び０．２％耐力が向上する一方、伸びについてはほとんど影響がないことが新たな知見として見出された。 Ti (titanium) has the effect of refining crystal grains, and is generally said to be an element capable of improving elongation, among the suppression of casting cracks and mechanical properties.
The content of Ti relative to the weight of the entire aluminum alloy is preferably in the range of 0.05% by weight or more and 0.25% by weight or less. If the content ratio of Ti is less than 0.05% by weight, it is difficult to refine the crystal grains in the aluminum alloy, and conversely, if the content ratio of Ti exceeds 0.25% by weight, This is because the melting of the aluminum alloy becomes difficult, and the possibility of the occurrence of the unmelted part will arise.
In addition, in the aluminum alloy of the present invention component, as described later, due to the interaction of the component compositions, the content ratio of Ti is approximately 0.25% by weight or less as the content ratio of Ti increases. While the tensile strength and 0.2% proof stress of the aluminum alloy were improved, it was found as a new finding that the elongation was hardly affected.
アルミニウム合金全体の重量に対するＴｉの含有割合は、０．０５重量％以上で且つ０．２５重量％以下の範囲内であることが好ましい。Ｔｉの含有割合が０．０５重量％未満の場合には、アルミニウム合金中の結晶粒を微細化するのが困難となり、逆に、Ｔｉの含有割合が０．２５重量％を超える場合には、アルミニウム合金の溶解が難しくなり、溶け残りの生じる可能性が出てくるからである。
なお、本発明成分のアルミニウム合金では、後述するように、その成分組成の相互的作用により、Ｔｉの含有割合が概ね０．２５重量％以下の範囲内において、Ｔｉの含有割合が増えるに伴って、アルミニウム合金の引張強さ及び０．２％耐力が向上する一方、伸びについてはほとんど影響がないことが新たな知見として見出された。 Ti (titanium) has the effect of refining crystal grains, and is generally said to be an element capable of improving elongation, among the suppression of casting cracks and mechanical properties.
The content of Ti relative to the weight of the entire aluminum alloy is preferably in the range of 0.05% by weight or more and 0.25% by weight or less. If the content ratio of Ti is less than 0.05% by weight, it is difficult to refine the crystal grains in the aluminum alloy, and conversely, if the content ratio of Ti exceeds 0.25% by weight, This is because the melting of the aluminum alloy becomes difficult, and the possibility of the occurrence of the unmelted part will arise.
In addition, in the aluminum alloy of the present invention component, as described later, due to the interaction of the component compositions, the content ratio of Ti is approximately 0.25% by weight or less as the content ratio of Ti increases. While the tensile strength and 0.2% proof stress of the aluminum alloy were improved, it was found as a new finding that the elongation was hardly affected.
Ｍｎ（マンガン）は、上述したＦｅと同様に、主としてダイカスト時におけるアルミニウム合金と金型との焼付きを防止するためのものである。このＭｎもＦｅと同様に、大量に含有させると適温での溶解が困難になることから、本発明では、アルミニウム合金全体の重量に対するＭｎの含有割合を０．８重量％以下に抑えている。
なお、このＭｎの含有割合の下限については特に限定する必要はないが、上記焼付き防止効果を顕著に発揮させるためには、Ｍｎを０．２重量％以上含有させるのが好ましい。 Mn (manganese) is mainly for preventing seizing between the aluminum alloy and the mold at the time of die casting, similarly to Fe described above. Like Fe, too much content of Mn makes it difficult to melt at an appropriate temperature. Therefore, in the present invention, the content of Mn with respect to the weight of the entire aluminum alloy is suppressed to 0.8% by weight or less.
The lower limit of the content of Mn is not particularly limited, but in order to exert the above-mentioned anti-seizure effect remarkably, it is preferable to contain Mn in an amount of 0.2% by weight or more.
なお、このＭｎの含有割合の下限については特に限定する必要はないが、上記焼付き防止効果を顕著に発揮させるためには、Ｍｎを０．２重量％以上含有させるのが好ましい。 Mn (manganese) is mainly for preventing seizing between the aluminum alloy and the mold at the time of die casting, similarly to Fe described above. Like Fe, too much content of Mn makes it difficult to melt at an appropriate temperature. Therefore, in the present invention, the content of Mn with respect to the weight of the entire aluminum alloy is suppressed to 0.8% by weight or less.
The lower limit of the content of Mn is not particularly limited, but in order to exert the above-mentioned anti-seizure effect remarkably, it is preferable to contain Mn in an amount of 0.2% by weight or more.
Ｃｒ（クロム）は、上述したＦｅやＭｎと同様に、ダイカスト時におけるアルミニウム合金と金型との焼付きを防止するのに加え、合金の耐食性を向上させる効果を有する元素である。
アルミニウム合金全体の重量に対するＣｒの含有割合は、上述したように０．１重量％以上で且つ０．４重量％以下の範囲内であることが好ましい。Ｃｒの含有割合が０．１重量％未満の場合には、上述の効果を十分に得ることができなくなり、逆に、Ｃｒの含有割合が０．４重量％を超える場合には、これ以上添加量を増やしても添加効果が上がらなくなるからである。 Cr (chromium) is an element having an effect of improving the corrosion resistance of the alloy in addition to preventing the seizure between the aluminum alloy and the die at the time of die casting, similarly to Fe and Mn described above.
The content of Cr relative to the weight of the entire aluminum alloy is preferably in the range of 0.1 wt% or more and 0.4 wt% or less as described above. If the content ratio of Cr is less than 0.1% by weight, the above-mentioned effects can not be sufficiently obtained, and conversely, if the content ratio of Cr exceeds 0.4% by weight, further addition is made Even if the amount is increased, the addition effect can not be improved.
アルミニウム合金全体の重量に対するＣｒの含有割合は、上述したように０．１重量％以上で且つ０．４重量％以下の範囲内であることが好ましい。Ｃｒの含有割合が０．１重量％未満の場合には、上述の効果を十分に得ることができなくなり、逆に、Ｃｒの含有割合が０．４重量％を超える場合には、これ以上添加量を増やしても添加効果が上がらなくなるからである。 Cr (chromium) is an element having an effect of improving the corrosion resistance of the alloy in addition to preventing the seizure between the aluminum alloy and the die at the time of die casting, similarly to Fe and Mn described above.
The content of Cr relative to the weight of the entire aluminum alloy is preferably in the range of 0.1 wt% or more and 0.4 wt% or less as described above. If the content ratio of Cr is less than 0.1% by weight, the above-mentioned effects can not be sufficiently obtained, and conversely, if the content ratio of Cr exceeds 0.4% by weight, further addition is made Even if the amount is increased, the addition effect can not be improved.
以上の含有割合に従って、Ｃｕ，Ｓｉ，Ｍｇ，Ｆｅ，Ｔｉ，Ｍｎ及びＣｒの含有割合を調整すると、安全性の高い簡単な処方で有りながら、鋳造性や機械的性質のみならず、耐食性にも優れたダイカスト用アルミニウム合金地金を得ることができる。
If the content ratio of Cu, Si, Mg, Fe, Ti, Mn and Cr is adjusted according to the above content ratio, not only castability and mechanical properties but also corrosion resistance can be achieved even though it is a safe recipe with high safety. Excellent die-casting aluminum alloy ingots can be obtained.
なお、上述した各元素成分のほかに、Ｎａ（ナトリウム），Ｓｒ（ストロンチウム），Ｃａ（カルシウム）およびＳｂ（アンチモン）から選ばれる少なくとも１種を改良処理材として添加するようにしてもよい。このような改良処理材を添加することによって共晶Ｓｉの粒子を細かくすることができ、アルミニウム合金の靱性や強度をより一層向上させることができる。
ここで、アルミニウム合金全体の重量に対する改良処理材の添加割合は、当該改良処理材がＮａ，ＳｒおよびＣａの場合には３０～２００ｐｐｍ、Ｓｂの場合には０．０５～０．２０重量％の範囲であることが好ましい。改良処理材の添加割合が３０ｐｐｍ(Ｓｂの場合には０．０５重量％)未満の場合には、アルミニウム合金中の共晶Ｓｉの粒子を微細化するのが困難となり、逆に、改良処理材の添加割合が２００ｐｐｍ(Ｓｂの場合には０．２０重量％)より多い場合には、アルミニウム合金中の共晶Ｓｉの粒子は十分に微細化されており、これ以上添加量を増やしても添加効果が上がらなくなるからである。 In addition to the above-described respective element components, at least one selected from Na (sodium), Sr (strontium), Ca (calcium) and Sb (antimony) may be added as the improvement treatment material. By adding such an improvement treatment material, particles of eutectic Si can be made finer, and the toughness and strength of the aluminum alloy can be further improved.
Here, the addition ratio of the improved material to the total weight of the aluminum alloy is 30 to 200 ppm when the improved material is Na, Sr and Ca, and 0.05 to 0.20% by weight when Sb is used. It is preferable that it is a range. If the addition ratio of the improvement treatment material is less than 30 ppm (0.05% by weight in the case of Sb), it becomes difficult to refine the particles of eutectic Si in the aluminum alloy, conversely, the improvement treatment material In the case where the addition ratio of is greater than 200 ppm (0.20% by weight in the case of Sb), the particles of eutectic Si in the aluminum alloy are sufficiently finely divided, and addition is possible even if the addition amount is further increased It is because the effect does not rise.
ここで、アルミニウム合金全体の重量に対する改良処理材の添加割合は、当該改良処理材がＮａ，ＳｒおよびＣａの場合には３０～２００ｐｐｍ、Ｓｂの場合には０．０５～０．２０重量％の範囲であることが好ましい。改良処理材の添加割合が３０ｐｐｍ(Ｓｂの場合には０．０５重量％)未満の場合には、アルミニウム合金中の共晶Ｓｉの粒子を微細化するのが困難となり、逆に、改良処理材の添加割合が２００ｐｐｍ(Ｓｂの場合には０．２０重量％)より多い場合には、アルミニウム合金中の共晶Ｓｉの粒子は十分に微細化されており、これ以上添加量を増やしても添加効果が上がらなくなるからである。 In addition to the above-described respective element components, at least one selected from Na (sodium), Sr (strontium), Ca (calcium) and Sb (antimony) may be added as the improvement treatment material. By adding such an improvement treatment material, particles of eutectic Si can be made finer, and the toughness and strength of the aluminum alloy can be further improved.
Here, the addition ratio of the improved material to the total weight of the aluminum alloy is 30 to 200 ppm when the improved material is Na, Sr and Ca, and 0.05 to 0.20% by weight when Sb is used. It is preferable that it is a range. If the addition ratio of the improvement treatment material is less than 30 ppm (0.05% by weight in the case of Sb), it becomes difficult to refine the particles of eutectic Si in the aluminum alloy, conversely, the improvement treatment material In the case where the addition ratio of is greater than 200 ppm (0.20% by weight in the case of Sb), the particles of eutectic Si in the aluminum alloy are sufficiently finely divided, and addition is possible even if the addition amount is further increased It is because the effect does not rise.
また、上記改良処理材に代えて、或いは改良処理材と共に、Ｂ（硼素）を添加するようにしてもよい。このようにＢを添加することによってアルミニウム合金の結晶粒が微細化され、当該合金の伸びを向上させることができる。なお、かかる効果は、特にＳｉ量が少ない場合や冷却速度の遅い鋳造方法を用いる場合に顕著となる。
アルミニウム合金全体の重量に対するＢの添加割合は、１～５０ｐｐｍの範囲であることが好ましい。Ｂの添加割合が１ｐｐｍ未満の場合には、アルミニウム合金中の結晶粒を微細化するのが困難となり、逆に、Ｂの添加割合が５０ｐｐｍより多い場合には、アルミニウム合金中の結晶粒は十分に微細化されており、これ以上添加量を増やしても添加効果が上がらなくなるからである。 Further, B (boron) may be added instead of the above-mentioned improved treatment material or together with the improvement treatment material. By adding B in this manner, the crystal grains of the aluminum alloy can be refined, and the elongation of the alloy can be improved. Such an effect is particularly remarkable when the amount of Si is small or when a casting method with a slow cooling rate is used.
The proportion of B added to the total weight of the aluminum alloy is preferably in the range of 1 to 50 ppm. When the addition ratio of B is less than 1 ppm, it is difficult to refine the crystal grains in the aluminum alloy, and conversely, when the addition ratio of B is more than 50 ppm, the crystal grains in the aluminum alloy are sufficient. The effect of addition is not improved even if the amount of addition is further increased.
アルミニウム合金全体の重量に対するＢの添加割合は、１～５０ｐｐｍの範囲であることが好ましい。Ｂの添加割合が１ｐｐｍ未満の場合には、アルミニウム合金中の結晶粒を微細化するのが困難となり、逆に、Ｂの添加割合が５０ｐｐｍより多い場合には、アルミニウム合金中の結晶粒は十分に微細化されており、これ以上添加量を増やしても添加効果が上がらなくなるからである。 Further, B (boron) may be added instead of the above-mentioned improved treatment material or together with the improvement treatment material. By adding B in this manner, the crystal grains of the aluminum alloy can be refined, and the elongation of the alloy can be improved. Such an effect is particularly remarkable when the amount of Si is small or when a casting method with a slow cooling rate is used.
The proportion of B added to the total weight of the aluminum alloy is preferably in the range of 1 to 50 ppm. When the addition ratio of B is less than 1 ppm, it is difficult to refine the crystal grains in the aluminum alloy, and conversely, when the addition ratio of B is more than 50 ppm, the crystal grains in the aluminum alloy are sufficient. The effect of addition is not improved even if the amount of addition is further increased.
本発明のダイカスト用アルミニウム合金を製造する際には、まず、Ａｌ，Ｃｕ，Ｓｉ，Ｍｇ，Ｆｅ，Ｔｉ，Ｍｎ及びＣｒの各元素成分が上述した所定の割合となるように含有させた原料を準備する（必要に応じて上記改良処理材等も添加。）。続いて、この原料を前炉付溶解炉や密閉溶解炉などの溶解炉に投入し、これらを溶解させる。溶解させた原料すなわちアルミニウム合金の溶湯は、必要に応じて脱水素処理および脱介在物処理などの精製処理が施される。そして、精製された溶湯を所定の鋳型などに流し込み、固化させることによって、アルミニウム合金の溶湯を合金地金インゴットなどに成形する。
In the case of producing the aluminum alloy for die casting of the present invention, first, the raw materials contained such that the respective elemental components of Al, Cu, Si, Mg, Fe, Ti, Mn and Cr become the above-mentioned predetermined ratio are Prepare (If necessary, add the above-mentioned improved materials etc.). Subsequently, the raw material is put into a melting furnace such as a forging furnace-containing melting furnace or a closed melting furnace to melt these materials. The molten raw material thus melted, that is, the molten metal of the aluminum alloy, is subjected to a purification treatment such as dehydrogenation treatment and removal treatment, if necessary. Then, the refined molten metal is poured into a predetermined mold or the like and solidified to form a molten metal of an aluminum alloy into an alloy base metal ingot or the like.
また、本発明のダイカスト用アルミニウム合金を用いてアルミニウム合金ダイカストを鋳造した後、必要に応じて溶体化処理及び時効処理などが施される。このようにアルミニウム合金ダイカストに溶体化処理および時効処理などを施すことによってアルミニウム合金鋳物の機械的特性を改良することができる。
In addition, after casting an aluminum alloy die cast using the aluminum alloy for die casting of the present invention, solution treatment, aging treatment and the like are performed as needed. Thus, the mechanical properties of the aluminum alloy casting can be improved by subjecting the aluminum alloy die cast to solution treatment, aging treatment and the like.
以下に、実施例を挙げて本発明を具体的に説明するが、本発明は実施例に限定されるものではない。
なお、下記の各種合金における機械的特性(具体的には、引張強さ，伸び，０．２％耐力)は、次の方法で測定した。すなわち、型締力１３５トンの通常のダイカストマシン(東芝機械(株)社製・ＤＣ１３５ＥＬ)を用いて、射出速度１．０ｍ／秒、鋳造圧力６０ＭＰａでダイカスト鋳造し、ＡＳＴＭ(American Society for Testing and Material)規格に準拠した丸棒試験片を作製した。そして、鋳放しの状態のかかる丸棒試験片について、(株)島津製作所社製の万能試験機(ＡＧ－ＩＳ １００ｋＮ)を用いて、引張強さ，伸び，０．２％耐力を測定した。
また、各種合金の合金成分は、固体発光分光分析機（サーモフィッシャーサイエンティフィック社製 Ｔｈｅｒｍｏ Ｓｃｉｅｎｔｉｆｉｃ ＡＲＬ４４６０）を用いて測定した。
さらに、耐食性については、日本工業規格ＪＩＳ Ｚ２３７１に準拠した（中性）塩水噴霧試験にて評価を行なった。その際、スガ試験機(株)社製のキャス試験機ＣＡＳＳＥＲ－ＩＳＯ－３を用いて当該試験を行った。 Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to the examples.
The mechanical properties (specifically, tensile strength, elongation, 0.2% proof stress) in the following various alloys were measured by the following methods. That is, using an ordinary die casting machine with a clamping force of 135 tons (DC 135EL manufactured by Toshiba Machine Co., Ltd.), die casting is performed at an injection speed of 1.0 m / s and a casting pressure of 60 MPa. ASTM (American Society for Testing and Material) Round bar test piece conforming to the standard was prepared. The tensile strength, elongation and 0.2% proof stress of the as-cast round bar test pieces were measured using a universal tester (AG-IS 100 kN) manufactured by Shimadzu Corporation.
In addition, alloy components of various alloys were measured using a solid-state emission spectrometer (Thermo Scientific ARL 4460 manufactured by Thermo Fisher Scientific Co., Ltd.).
Furthermore, the corrosion resistance was evaluated by a (neutral) salt spray test in accordance with Japanese Industrial Standard JIS Z2371. At that time, the test was carried out using a Cass tester CASSER-ISO-3 manufactured by Suga Test Instruments Co., Ltd.
なお、下記の各種合金における機械的特性(具体的には、引張強さ，伸び，０．２％耐力)は、次の方法で測定した。すなわち、型締力１３５トンの通常のダイカストマシン(東芝機械(株)社製・ＤＣ１３５ＥＬ)を用いて、射出速度１．０ｍ／秒、鋳造圧力６０ＭＰａでダイカスト鋳造し、ＡＳＴＭ(American Society for Testing and Material)規格に準拠した丸棒試験片を作製した。そして、鋳放しの状態のかかる丸棒試験片について、(株)島津製作所社製の万能試験機(ＡＧ－ＩＳ １００ｋＮ)を用いて、引張強さ，伸び，０．２％耐力を測定した。
また、各種合金の合金成分は、固体発光分光分析機（サーモフィッシャーサイエンティフィック社製 Ｔｈｅｒｍｏ Ｓｃｉｅｎｔｉｆｉｃ ＡＲＬ４４６０）を用いて測定した。
さらに、耐食性については、日本工業規格ＪＩＳ Ｚ２３７１に準拠した（中性）塩水噴霧試験にて評価を行なった。その際、スガ試験機(株)社製のキャス試験機ＣＡＳＳＥＲ－ＩＳＯ－３を用いて当該試験を行った。 Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to the examples.
The mechanical properties (specifically, tensile strength, elongation, 0.2% proof stress) in the following various alloys were measured by the following methods. That is, using an ordinary die casting machine with a clamping force of 135 tons (DC 135EL manufactured by Toshiba Machine Co., Ltd.), die casting is performed at an injection speed of 1.0 m / s and a casting pressure of 60 MPa. ASTM (American Society for Testing and Material) Round bar test piece conforming to the standard was prepared. The tensile strength, elongation and 0.2% proof stress of the as-cast round bar test pieces were measured using a universal tester (AG-IS 100 kN) manufactured by Shimadzu Corporation.
In addition, alloy components of various alloys were measured using a solid-state emission spectrometer (Thermo Scientific ARL 4460 manufactured by Thermo Fisher Scientific Co., Ltd.).
Furthermore, the corrosion resistance was evaluated by a (neutral) salt spray test in accordance with Japanese Industrial Standard JIS Z2371. At that time, the test was carried out using a Cass tester CASSER-ISO-3 manufactured by Suga Test Instruments Co., Ltd.
Ｃｕのアルミニウム合金物性に対する影響
表１は、Ｃｕ以外の合金成分が本発明範囲内における或る一定の割合となるように調整すると共に、Ｃｕの含有割合を変化させて製造したダイカスト用アルミニウム合金の成分組成及び各機械的特性(引張強さ，伸び，０．２％耐力)を示したものである。 Influence of Cu on Aluminum Alloy Physical Properties Table 1 shows that an alloy component other than Cu is adjusted to be a certain ratio within the range of the present invention, and an aluminum alloy for die casting manufactured by changing the content ratio of Cu. It shows the component composition and each mechanical property (tensile strength, elongation, 0.2% proof stress).
表１は、Ｃｕ以外の合金成分が本発明範囲内における或る一定の割合となるように調整すると共に、Ｃｕの含有割合を変化させて製造したダイカスト用アルミニウム合金の成分組成及び各機械的特性(引張強さ，伸び，０．２％耐力)を示したものである。 Influence of Cu on Aluminum Alloy Physical Properties Table 1 shows that an alloy component other than Cu is adjusted to be a certain ratio within the range of the present invention, and an aluminum alloy for die casting manufactured by changing the content ratio of Cu. It shows the component composition and each mechanical property (tensile strength, elongation, 0.2% proof stress).
この表１が示すように、Ｃｕの含有割合が概ね１．０重量％以下の範囲内では、Ｃｕの含有割合が増えるのに伴って、アルミニウム合金の引張強さ（図１－１参照）及び０．２％耐力（図１－２参照）が向上することが窺える。
これに対し、アルミニウム合金の伸びは、Ｃｕの含有割合が０．７重量％を超えると低下するような傾向が窺える。
なお、表１中の合金３～１１は、本発明範囲内の合金組成、すなわち実施例合金である。 As Table 1 shows, when the content ratio of Cu is approximately 1.0% by weight or less, as the content ratio of Cu increases, the tensile strength of the aluminum alloy (see FIG. 1-1) and It can be seen that the 0.2% proof stress (see Figure 1-2) improves.
On the other hand, the elongation of the aluminum alloy tends to decrease as the Cu content exceeds 0.7% by weight.
Alloys 3 to 11 in Table 1 have alloy compositions within the scope of the present invention, that is, Example alloys.
これに対し、アルミニウム合金の伸びは、Ｃｕの含有割合が０．７重量％を超えると低下するような傾向が窺える。
なお、表１中の合金３～１１は、本発明範囲内の合金組成、すなわち実施例合金である。 As Table 1 shows, when the content ratio of Cu is approximately 1.0% by weight or less, as the content ratio of Cu increases, the tensile strength of the aluminum alloy (see FIG. 1-1) and It can be seen that the 0.2% proof stress (see Figure 1-2) improves.
On the other hand, the elongation of the aluminum alloy tends to decrease as the Cu content exceeds 0.7% by weight.
Alloys 3 to 11 in Table 1 have alloy compositions within the scope of the present invention, that is, Example alloys.
Ｃｒの含有による耐食性向上効果
表２は、鋳造方法別の各アルミニウム合金組成と耐食性との関係を示した表である。
ここで、表２におけるダイカストのものは、上述の機械的性質測定に供した試料と同様の方法で鋳造したものである。一方、表２における重力鋳造のものは、所定の成分に調整したアルミニウム合金を金型に投入して重力鋳造を行い、その後はダイカストと同様にＪＩＳ Ｚ２３７１に準拠した塩水噴霧試験用の試料(耐食性評価試験片)に加工し、塩水噴霧試験を行った。 Corrosion resistance improvement effect by inclusion of Cr Table 2 is a table showing the relationship between the corrosion resistance and the composition of each aluminum alloy according to the casting method.
Here, the die-cast ones in Table 2 were cast by the same method as the sample used for the above-mentioned mechanical property measurement. On the other hand, for gravity casting in Table 2, the aluminum alloy adjusted to predetermined components is poured into a mold and gravity casting is performed, and thereafter a sample for salt water spray test in accordance with JIS Z 2371 similar to die casting (corrosion resistance They were processed into evaluation test pieces and subjected to a salt spray test.
表２は、鋳造方法別の各アルミニウム合金組成と耐食性との関係を示した表である。
ここで、表２におけるダイカストのものは、上述の機械的性質測定に供した試料と同様の方法で鋳造したものである。一方、表２における重力鋳造のものは、所定の成分に調整したアルミニウム合金を金型に投入して重力鋳造を行い、その後はダイカストと同様にＪＩＳ Ｚ２３７１に準拠した塩水噴霧試験用の試料(耐食性評価試験片)に加工し、塩水噴霧試験を行った。 Corrosion resistance improvement effect by inclusion of Cr Table 2 is a table showing the relationship between the corrosion resistance and the composition of each aluminum alloy according to the casting method.
Here, the die-cast ones in Table 2 were cast by the same method as the sample used for the above-mentioned mechanical property measurement. On the other hand, for gravity casting in Table 2, the aluminum alloy adjusted to predetermined components is poured into a mold and gravity casting is performed, and thereafter a sample for salt water spray test in accordance with JIS Z 2371 similar to die casting (corrosion resistance They were processed into evaluation test pieces and subjected to a salt spray test.
この表２が示すように、ダイカストにより得た鋳造品において、Ｃｕの含有割合を０．１０重量％の一定とした場合、Ｃｒの含有割合が０．１０重量％以上になると腐食減量が減少し、耐食性が良くなることが窺える（図２－１参照）。
また、ダイカストにより得た鋳造品において、Ｃｒの含有割合を０．２０重量％の一定とした場合、Ｃｕの含有割合を０．１０重量％から０．７３重量％まで増加させるのに伴って腐食減量も増加し、耐食性が悪化する傾向が示された（図２－３参照）。
また、重力鋳造により得た鋳造品においても、Ｃｕの含有割合の増加に伴って合金の耐食性が悪化するが、Ｃｒを０．２０重量％含有させることにより、腐食減量を著しく低下させ、耐食性を向上できることが明らかになった（図２－２参照）。
なお、表２中の合金１５～２０，２６及び２７は、本発明範囲内の合金組成、すなわち実施例合金である。 As Table 2 shows, in a cast product obtained by die casting, when the content ratio of Cu is constant at 0.10% by weight, the corrosion loss decreases when the content ratio of Cr becomes 0.10% by weight or more. The corrosion resistance can be improved (see Figure 2-1).
Further, in a cast product obtained by die casting, when the content ratio of Cr is constant at 0.20% by weight, corrosion is accompanied by increasing the content ratio of Cu from 0.10% by weight to 0.73% by weight. Weight loss also increased, indicating a tendency for corrosion resistance to deteriorate (see Figure 2-3).
In addition, even in a cast product obtained by gravity casting, the corrosion resistance of the alloy deteriorates with an increase in the content of Cu, but by containing 0.20% by weight of Cr, the corrosion loss is remarkably reduced and the corrosion resistance is It has become clear that it can be improved (see Figure 2-2).
The alloys 15 to 20, 26 and 27 in Table 2 have alloy compositions within the scope of the present invention, ie, example alloys.
また、ダイカストにより得た鋳造品において、Ｃｒの含有割合を０．２０重量％の一定とした場合、Ｃｕの含有割合を０．１０重量％から０．７３重量％まで増加させるのに伴って腐食減量も増加し、耐食性が悪化する傾向が示された（図２－３参照）。
また、重力鋳造により得た鋳造品においても、Ｃｕの含有割合の増加に伴って合金の耐食性が悪化するが、Ｃｒを０．２０重量％含有させることにより、腐食減量を著しく低下させ、耐食性を向上できることが明らかになった（図２－２参照）。
なお、表２中の合金１５～２０，２６及び２７は、本発明範囲内の合金組成、すなわち実施例合金である。 As Table 2 shows, in a cast product obtained by die casting, when the content ratio of Cu is constant at 0.10% by weight, the corrosion loss decreases when the content ratio of Cr becomes 0.10% by weight or more. The corrosion resistance can be improved (see Figure 2-1).
Further, in a cast product obtained by die casting, when the content ratio of Cr is constant at 0.20% by weight, corrosion is accompanied by increasing the content ratio of Cu from 0.10% by weight to 0.73% by weight. Weight loss also increased, indicating a tendency for corrosion resistance to deteriorate (see Figure 2-3).
In addition, even in a cast product obtained by gravity casting, the corrosion resistance of the alloy deteriorates with an increase in the content of Cu, but by containing 0.20% by weight of Cr, the corrosion loss is remarkably reduced and the corrosion resistance is It has become clear that it can be improved (see Figure 2-2).
The alloys 15 to 20, 26 and 27 in Table 2 have alloy compositions within the scope of the present invention, ie, example alloys.
Ｔｉのアルミニウム合金物性に対する影響
表３は、Ｔｉ以外の合金成分が本発明範囲内における或る一定の割合となるように調整すると共に、Ｔｉの含有割合を変化させて製造したダイカスト用アルミニウム合金の成分組成及び各機械的特性(引張強さ，伸び，０．２％耐力)を示したものである。 Influence of Ti on Aluminum Alloy Physical Properties Table 3 shows that aluminum alloy components for die-casting manufactured by adjusting the alloy components other than Ti to a certain ratio within the scope of the present invention and changing the content ratio of Ti It shows the component composition and each mechanical property (tensile strength, elongation, 0.2% proof stress).
表３は、Ｔｉ以外の合金成分が本発明範囲内における或る一定の割合となるように調整すると共に、Ｔｉの含有割合を変化させて製造したダイカスト用アルミニウム合金の成分組成及び各機械的特性(引張強さ，伸び，０．２％耐力)を示したものである。 Influence of Ti on Aluminum Alloy Physical Properties Table 3 shows that aluminum alloy components for die-casting manufactured by adjusting the alloy components other than Ti to a certain ratio within the scope of the present invention and changing the content ratio of Ti It shows the component composition and each mechanical property (tensile strength, elongation, 0.2% proof stress).
この表３が示すように、Ｔｉの含有割合が概ね０．２５重量％以下の範囲内では、Ｔｉの含有割合が増えるに伴って、アルミニウム合金の引張強さ（図３－１参照）及び０．２％耐力（図３－２参照）が向上することが窺える。
これに対し、アルミニウム合金の伸びは、Ｔｉの含有割合が概ね０．２５重量％以下の範囲内において、Ｔｉの含有割合との間に顕著な違いは認められなかった（図３－３）。
なお、表３中の合金３０～３２は、本発明範囲内の合金組成、すなわち実施例合金である。
As Table 3 shows, when the content ratio of Ti is approximately 0.25% by weight or less, as the content ratio of Ti increases, the tensile strength of the aluminum alloy (see FIG. 3-1) and 0 It can be seen that the 2% proof stress (see Figure 3-2) is improved.
On the other hand, no significant difference was observed in the elongation of the aluminum alloy with the content ratio of Ti within the range where the content ratio of Ti is approximately 0.25% by weight or less (FIG. 3-3).
The alloys 30 to 32 in Table 3 have alloy compositions within the scope of the present invention, ie, example alloys.
これに対し、アルミニウム合金の伸びは、Ｔｉの含有割合が概ね０．２５重量％以下の範囲内において、Ｔｉの含有割合との間に顕著な違いは認められなかった（図３－３）。
なお、表３中の合金３０～３２は、本発明範囲内の合金組成、すなわち実施例合金である。
As Table 3 shows, when the content ratio of Ti is approximately 0.25% by weight or less, as the content ratio of Ti increases, the tensile strength of the aluminum alloy (see FIG. 3-1) and 0 It can be seen that the 2% proof stress (see Figure 3-2) is improved.
On the other hand, no significant difference was observed in the elongation of the aluminum alloy with the content ratio of Ti within the range where the content ratio of Ti is approximately 0.25% by weight or less (FIG. 3-3).
The alloys 30 to 32 in Table 3 have alloy compositions within the scope of the present invention, ie, example alloys.
Claims (5)
- 重量％で、０．０３％＜Ｃｕ≦０．７％、６．０％＜Ｓｉ≦１１．０％、０．１５％≦Ｍｇ≦０．５０％、０．０５％≦Ｆｅ≦０．６％、０．０５％≦Ｔｉ≦０．２５％、Ｍｎ≦０．８％、０．１０％≦Ｃｒ≦０．４０％を含有し、残部がＡｌと不可避不純物とからなることを特徴とするダイカスト用アルミニウム合金。 In% by weight, 0.03% <Cu ≦ 0.7%, 6.0% <Si ≦ 11.0%, 0.15% ≦ Mg ≦ 0.50%, 0.05% ≦ Fe ≦ 0.6 %, 0.05% ≦ Ti ≦ 0.25%, Mn ≦ 0.8%, 0.10% ≦ Cr ≦ 0.40%, and the balance is made of Al and unavoidable impurities. Aluminum alloy for die casting.
- Ｎａ，ＳｒおよびＣａから選ばれる少なくとも１種を３０～２００ｐｐｍ添加したことを特徴とする請求項１に記載のダイカスト用アルミニウム合金。 The aluminum alloy for die casting according to claim 1, wherein 30 to 200 ppm of at least one selected from Na, Sr and Ca is added.
- Ｓｂを０．０５～０．２０重量％添加したことを特徴とする請求項１又は２に記載のダイカスト用アルミニウム合金。 The die-casting aluminum alloy according to claim 1 or 2, wherein 0.05 to 0.20% by weight of Sb is added.
- Ｂを１～５０ｐｐｍ添加したことを特徴とする請求項１乃至４のいずれかに記載のダイカスト用アルミニウム合金。 The aluminum alloy for die casting according to any one of claims 1 to 4, wherein 1 to 50 ppm of B is added.
- 請求項１乃至４のいずれかに記載のダイカスト用アルミニウム合金でダイカストされたことを特徴とするアルミニウム合金ダイカスト。 An aluminum alloy die cast made of the die casting aluminum alloy according to any one of claims 1 to 4.
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| PL15883648T PL3121302T3 (en) | 2015-04-15 | 2015-04-15 | Aluminum alloy for die casting, and die-cast aluminum alloy using same |
| PCT/JP2015/002086 WO2016166779A1 (en) | 2015-04-15 | 2015-04-15 | Aluminum alloy for die casting, and die-cast aluminum alloy using same |
| CN201580003603.XA CN106255770A (en) | 2015-04-15 | 2015-04-15 | Aluminium diecasting alloy and use the aluminum alloy die casting of this aluminium alloy |
| EP15883648.6A EP3121302B1 (en) | 2015-04-15 | 2015-04-15 | Aluminum alloy for die casting, and die-cast aluminum alloy using same |
| JP2015528116A JP5898819B1 (en) | 2015-04-15 | 2015-04-15 | Aluminum alloy for die casting and aluminum alloy die casting using the same |
| MYPI2017700056A MY183152A (en) | 2015-04-15 | 2015-04-15 | Aluminum alloy for die casting, and aluminum alloy die cast produced using same |
| MX2016010352A MX2016010352A (en) | 2015-04-15 | 2015-04-15 | Aluminum alloy for die casting, and die-cast aluminum alloy using same. |
| KR1020167030544A KR20170138916A (en) | 2015-04-15 | 2015-04-15 | Aluminum alloy for die casting, and die-cast aluminum alloy using same |
| US15/104,439 US20170121793A1 (en) | 2015-04-15 | 2015-04-15 | Aluminum alloy for die casting, and aluminum alloy die cast produced using same |
| PH12017500237A PH12017500237B1 (en) | 2015-04-15 | 2017-02-09 | Aluminum alloy for die casting, and die cast aluminum alloy using same |
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| US (1) | US20170121793A1 (en) |
| EP (1) | EP3121302B1 (en) |
| JP (1) | JP5898819B1 (en) |
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| MX (1) | MX2016010352A (en) |
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| PH (1) | PH12017500237B1 (en) |
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Also Published As
| Publication number | Publication date |
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| PL3121302T3 (en) | 2019-03-29 |
| CN106255770A (en) | 2016-12-21 |
| KR20170138916A (en) | 2017-12-18 |
| EP3121302A1 (en) | 2017-01-25 |
| US20170121793A1 (en) | 2017-05-04 |
| JPWO2016166779A1 (en) | 2017-04-27 |
| JP5898819B1 (en) | 2016-04-06 |
| EP3121302A4 (en) | 2017-05-31 |
| PH12017500237A1 (en) | 2017-07-03 |
| MX2016010352A (en) | 2018-02-09 |
| MY183152A (en) | 2021-02-16 |
| PH12017500237B1 (en) | 2017-07-03 |
| EP3121302B1 (en) | 2018-09-19 |
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