WO2016166779A1 - ダイカスト用アルミニウム合金およびこれを用いたアルミニウム合金ダイカスト - Google Patents

ダイカスト用アルミニウム合金およびこれを用いたアルミニウム合金ダイカスト Download PDF

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Publication number
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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WIPO (PCT)
Prior art keywords
aluminum alloy
weight
die
die casting
casting
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PCT/JP2015/002086
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English (en)
French (fr)
Japanese (ja)
Inventor
敦夫 鏑木
宮尻　聡
大城　直人
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株式会社大紀アルミニウム工業所
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Application filed by 株式会社大紀アルミニウム工業所 filed Critical 株式会社大紀アルミニウム工業所
Priority to JP2015528116A priority Critical patent/JP5898819B1/ja
Priority to MX2016010352A priority patent/MX2016010352A/es
Priority to MYPI2017700056A priority patent/MY183152A/en
Priority to PL15883648T priority patent/PL3121302T3/pl
Priority to KR1020167030544A priority patent/KR20170138916A/ko
Priority to US15/104,439 priority patent/US20170121793A1/en
Priority to PCT/JP2015/002086 priority patent/WO2016166779A1/ja
Priority to CN201580003603.XA priority patent/CN106255770A/zh
Priority to EP15883648.6A priority patent/EP3121302B1/en
Publication of WO2016166779A1 publication Critical patent/WO2016166779A1/ja
Priority to PH12017500237A priority patent/PH12017500237B1/en

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent

Definitions

  • 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).
PCT/JP2015/002086 2015-04-15 2015-04-15 ダイカスト用アルミニウム合金およびこれを用いたアルミニウム合金ダイカスト WO2016166779A1 (ja)

Priority Applications (10)

Application Number Priority Date Filing Date Title
JP2015528116A JP5898819B1 (ja) 2015-04-15 2015-04-15 ダイカスト用アルミニウム合金およびこれを用いたアルミニウム合金ダイカスト
MX2016010352A MX2016010352A (es) 2015-04-15 2015-04-15 Aleacion de aluminio para colada a presion y colada a presion de la aleacion de aluminio producida utilizando la misma.
MYPI2017700056A MY183152A (en) 2015-04-15 2015-04-15 Aluminum alloy for die casting, and aluminum alloy die cast produced using same
PL15883648T PL3121302T3 (pl) 2015-04-15 2015-04-15 Stop aluminium do odlewania kokilowego oraz odlew kokilowy ze stopu aluminium z jego użyciem
KR1020167030544A KR20170138916A (ko) 2015-04-15 2015-04-15 다이캐스트용 알루미늄 합금 및 이를 사용한 알루미늄 합금 다이캐스트
US15/104,439 US20170121793A1 (en) 2015-04-15 2015-04-15 Aluminum alloy for die casting, and aluminum alloy die cast produced using same
PCT/JP2015/002086 WO2016166779A1 (ja) 2015-04-15 2015-04-15 ダイカスト用アルミニウム合金およびこれを用いたアルミニウム合金ダイカスト
CN201580003603.XA CN106255770A (zh) 2015-04-15 2015-04-15 压铸用铝合金以及使用该铝合金的铝合金压铸件
EP15883648.6A EP3121302B1 (en) 2015-04-15 2015-04-15 Aluminum alloy for die casting, and die-cast aluminum alloy 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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PCT/JP2015/002086 WO2016166779A1 (ja) 2015-04-15 2015-04-15 ダイカスト用アルミニウム合金およびこれを用いたアルミニウム合金ダイカスト

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US (1) US20170121793A1 (zh)
EP (1) EP3121302B1 (zh)
JP (1) JP5898819B1 (zh)
KR (1) KR20170138916A (zh)
CN (1) CN106255770A (zh)
MX (1) MX2016010352A (zh)
MY (1) MY183152A (zh)
PH (1) PH12017500237B1 (zh)
PL (1) PL3121302T3 (zh)
WO (1) WO2016166779A1 (zh)

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CN108239715A (zh) * 2016-12-27 2018-07-03 格朗吉斯铝业（上海）有限公司 裂纹敏感铝合金的铸造工艺及其应用
WO2018189869A1 (ja) * 2017-04-13 2018-10-18 株式会社大紀アルミニウム工業所 ダイカスト用アルミニウム合金およびこれを用いたアルミニウム合金ダイカスト
WO2019059147A1 (ja) * 2017-09-20 2019-03-28 アイシン軽金属株式会社 ダイカスト鋳造用アルミニウム合金及びそれを用いた機能性部品
WO2020189325A1 (ja) * 2019-03-20 2020-09-24 日本軽金属株式会社 アルミニウム合金及びアルミニウム合金ダイカスト材
WO2022091944A1 (ja) * 2020-10-30 2022-05-05 昭和電工株式会社 自動車のホイール用アルミニウム合金及び自動車のホイール
WO2023167312A1 (ja) * 2022-03-03 2023-09-07 日本軽金属株式会社 鋳物用Ａｌ－Ｓｉ合金及びＡｌ－Ｓｉ合金鋳物並びにＡｌ－Ｓｉ合金鋳物接合体
JP7401080B1 (ja) 2023-08-31 2023-12-19 新陽株式会社 鋳造用Ａｌ合金の製造方法

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CN107604219A (zh) * 2017-09-26 2018-01-19 辽宁忠旺集团有限公司 一种高强铝合金车体部件的配方及其生产工艺
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JPWO2018189869A1 (ja) * 2017-04-13 2020-03-05 株式会社大紀アルミニウム工業所 ダイカスト用アルミニウム合金およびこれを用いたアルミニウム合金ダイカスト
JP6267408B1 (ja) * 2017-06-23 2018-01-24 株式会社大紀アルミニウム工業所 アルミニウム合金およびアルミニウム合金鋳物品
WO2018235272A1 (ja) * 2017-06-23 2018-12-27 株式会社大紀アルミニウム工業所 アルミニウム合金およびアルミニウム合金鋳物品
CN110709526A (zh) * 2017-06-23 2020-01-17 株式会社大纪铝工业所 铝合金及铝合金铸造品
WO2019059147A1 (ja) * 2017-09-20 2019-03-28 アイシン軽金属株式会社 ダイカスト鋳造用アルミニウム合金及びそれを用いた機能性部品
JPWO2019059147A1 (ja) * 2017-09-20 2020-07-30 アイシン軽金属株式会社 ダイカスト鋳造用アルミニウム合金及びそれを用いた機能性部品
WO2020189325A1 (ja) * 2019-03-20 2020-09-24 日本軽金属株式会社 アルミニウム合金及びアルミニウム合金ダイカスト材
WO2022091944A1 (ja) * 2020-10-30 2022-05-05 昭和電工株式会社 自動車のホイール用アルミニウム合金及び自動車のホイール
WO2023167312A1 (ja) * 2022-03-03 2023-09-07 日本軽金属株式会社 鋳物用Ａｌ－Ｓｉ合金及びＡｌ－Ｓｉ合金鋳物並びにＡｌ－Ｓｉ合金鋳物接合体
JP7401080B1 (ja) 2023-08-31 2023-12-19 新陽株式会社 鋳造用Ａｌ合金の製造方法

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PL3121302T3 (pl) 2019-03-29
KR20170138916A (ko) 2017-12-18
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US20170121793A1 (en) 2017-05-04
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