WO2018189869A1 - Alliage d'aluminium pour coulée sous pression et coulée sous pression d'un alliage d'aluminium l'utilisant - Google Patents

Alliage d'aluminium pour coulée sous pression et coulée sous pression d'un alliage d'aluminium l'utilisant Download PDF

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Publication number
WO2018189869A1
WO2018189869A1 PCT/JP2017/015176 JP2017015176W WO2018189869A1 WO 2018189869 A1 WO2018189869 A1 WO 2018189869A1 JP 2017015176 W JP2017015176 W JP 2017015176W WO 2018189869 A1 WO2018189869 A1 WO 2018189869A1
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Prior art keywords
aluminum alloy
die casting
weight
alloy
content
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PCT/JP2017/015176
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English (en)
Japanese (ja)
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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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Priority to PCT/JP2017/015176 priority Critical patent/WO2018189869A1/fr
Priority to JP2019512133A priority patent/JP6852146B2/ja
Publication of WO2018189869A1 publication Critical patent/WO2018189869A1/fr

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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 light in weight and excellent in formability and mass productivity, and are therefore widely used as components in automobiles, industrial machines, aircraft, home appliances, and other various fields.
  • automotive applications the application of aluminum alloy die casting to bodies and undercarriage parts is expanding for the purpose of reducing the weight of the vehicle body and the accompanying fuel saving.
  • many parts using aluminum alloys have been adopted, but on the other hand, since many of these parts are important safety parts, not only mechanical properties such as proof stress and ductility, but also In view of the required service life and usage environment, corrosion resistance that can withstand long-term use is required. For this reason, with existing alloys, although the mechanical properties required for such parts can be satisfied, a situation in which corrosion resistance cannot be satisfied has begun to occur.
  • Patent Document 1 9.5 to 11.5 weight as a material suitable for a safety component such as an automobile wheel (wheel) is disclosed.
  • % Silicon (Si) 0.1-0.5 wt% magnesium (Mg), 0.5-0.8 wt% manganese (Mn), max 0.15 wt% iron (Fe), max Contains 0.03 wt% copper (Cu), up to 0.10 wt% zinc (Zn), up to 0.15 wt% titanium (Ti), the balance being aluminum (Al) and a permanent atomizer
  • a die casting aluminum alloy composed of 30 to 300 ppm of strontium (Sr) is disclosed. According to this technique, since the content ratio of Cu that corrodes the aluminum alloy by the battery action is suppressed to 0.03% by weight at the maximum, an aluminum alloy for die casting having high corrosion resistance can be provided.
  • the main problem of the present invention is that it can be produced economically and sustainably by using recycled raw materials, as well as important safety parts for automobiles having improved mechanical properties without impairing corrosion resistance. It is an object to provide a suitable aluminum alloy for die casting and an aluminum alloy die casting made of the alloy.
  • Aluminum alloy In the present invention, Cu is contained in the range of 0.05% by weight or more and 0.70% by weight or less, and Mg is contained in the range of more than 0.50% by weight to 1.0% by weight or less. Therefore, in addition to enabling the use of recycled raw materials, mechanical properties such as tensile strength and 0.2% proof stress can be improved.
  • an aluminum alloy for die casting excellent not only in castability and mechanical properties but also in corrosion resistance can be obtained by merely including six kinds of elemental components at a predetermined ratio and by their interaction.
  • the ingot can be economically safe and simple to manufacture.
  • 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, or 0.05 to 0.20% by weight of Sb. By doing so, the 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 doing this, even when the amount of Si is small or when using a casting method with a slow cooling rate, the crystal grains of the aluminum alloy can be refined, and as a result, the elongation of the aluminum alloy can be improved. Can do.
  • an aluminum alloy die casting comprising the die casting aluminum alloy according to the first aspect.
  • the aluminum alloy die casting made of the aluminum alloy for die casting of the present invention can be mass-produced with good castability and has excellent corrosion resistance as well as mechanical properties such as tensile strength and hardness. Suitable for use.
  • the present invention in addition to being able to produce economically and sustainably using recycled raw materials, it is suitable for die-casting suitable for important safety parts of automobiles having improved mechanical properties without impairing corrosion resistance.
  • An aluminum alloy and an aluminum alloy die casting made of the alloy can be provided.
  • the aluminum alloy for die casting of the present invention (hereinafter also simply referred to as “aluminum alloy”) is 0.05% ⁇ Cu (copper) ⁇ 0.70%, 4.0% ⁇ Si (silicon) ⁇ % by weight. 11.0%, 0.50% ⁇ Mg (magnesium) ⁇ 1.0%, 0.05% ⁇ Fe (iron) ⁇ 0.60%, Mn (manganese) ⁇ 0.8%, 0.10% ⁇ It contains Cr (chromium) ⁇ 0.40%, and the balance is substantially composed of Al (aluminum) and inevitable impurities.
  • aluminum alloy is 0.05% ⁇ Cu (copper) ⁇ 0.70%, 4.0% ⁇ Si (silicon) ⁇ % by weight. 11.0%, 0.50% ⁇ Mg (magnesium) ⁇ 1.0%, 0.05% ⁇ Fe (iron) ⁇ 0.60%, Mn (manganese) ⁇ 0.8%, 0.10% ⁇ It contains Cr (chromium) ⁇ 0.40%
  • Cu copper is an important element for improving the wear resistance, mechanical strength, and hardness of an aluminum alloy.
  • the content ratio of Cu with respect to the weight of the entire aluminum alloy is preferably 0.05% by weight or more and 0.70% by weight or less.
  • the Cu content is less than 0.05% by weight, the above-mentioned mechanical property improving effect cannot be obtained.
  • the Cu content exceeds 0.70% by weight the corrosion resistance is not improved. This is because problems such as a significant decrease in elongation, a decrease in elongation, and an increase in specific gravity will occur.
  • Si silicon is an important element that ensures fluidity at the time of melting an aluminum alloy and improves castability.
  • the content ratio of Si with respect to the weight of the entire aluminum alloy is preferably 4.0% by weight or more and 11.0% by weight or less.
  • the Si content is less than 4.0% by weight, it is difficult to ensure the fluidity of the molten metal, and it is applied to large parts when considering the usual die casting that is commonly used.
  • the Si content exceeds 11.0% by weight, the elongation of the alloy decreases.
  • Mg manganesium
  • Mg 2 Si aluminum alloy
  • excessive content contains castability and corrosion resistance. It is a component that adversely affects
  • the content ratio of Mg with respect to the weight of the entire aluminum alloy is preferably in the range of more than 0.50 wt% and 1.0 wt% or less.
  • the Mg content is 0.5% by weight or less, in addition to the above effects, it becomes possible to ensure the 0.2% proof stress of the alloy without performing heat treatment. This is because if it exceeds 1.0% by weight, the elongation and corrosion resistance of the alloy will be significantly reduced.
  • Fe iron
  • the content ratio of Fe with respect to the weight of the entire aluminum alloy is preferably in the range of 0.05 to 0.60% by weight.
  • the effect of preventing seizure at the time of die casting is not sufficient, and conversely, when the Fe content is more than 0.6% by weight, the above effect of preventing seizure is also achieved. Is sufficient, but the toughness of the alloy decreases and the melting temperature rises to deteriorate the castability.
  • Mn manganese
  • Mn is mainly for preventing seizure between the aluminum alloy and the mold during die casting, as with the above-described Fe.
  • the content ratio 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 ratio of Mn is not particularly limited, but it is preferable to contain Mn in an amount of 0.2% by weight or more in order to exert the above-described seizure prevention effect remarkably.
  • Cr is an element having the effect of improving the corrosion resistance of the alloy in addition to preventing seizure between the aluminum alloy and the mold during die casting, as with the above-described Fe and Mn.
  • the content ratio of Cr with respect to the weight of the entire aluminum alloy is preferably in the range of 0.10 wt% or more and 0.40 wt% or less.
  • the Cr content is less than 0.10% by weight, the above effects cannot be obtained sufficiently.
  • the Cr content exceeds 0.40% by weight no more is added. This is because even if the amount is increased, the effect of addition cannot be improved.
  • Ti titanium
  • This Ti has an effect of refining crystal grains, and is generally said to be an element that can particularly improve elongation among suppression of casting cracks and mechanical properties.
  • the content ratio of Ti with respect to the weight of the entire aluminum alloy is preferably in the range of 0.30% by weight or less. This is because when the Ti content exceeds 0.30% by weight, it becomes difficult to dissolve the aluminum alloy, and there is a possibility that undissolved material is generated.
  • At least one selected from Na (sodium), Sr (strontium), Ca (calcium), and Sb (antimony) may be added as an improvement treatment material.
  • the 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 treatment material to the total weight of the aluminum alloy is 30 to 200 ppm when the improved treatment material is Na, Sr and Ca, and 0.05 to 0.20% by weight when Sb is used. A range is preferable.
  • the addition ratio of the improved treatment material is less than 30 ppm (0.05% by weight in the case of Sb), it becomes difficult to refine the eutectic Si particles in the aluminum alloy.
  • the addition ratio of Z is more than 200 ppm (0.20% by weight in the case of Sb)
  • the eutectic Si particles in the aluminum alloy are sufficiently refined and added even if the addition amount is further increased. This is because the effect does not increase.
  • B boron
  • B boron
  • the addition ratio of B with respect to the weight of the entire 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.
  • the addition ratio of B is more than 50 ppm, the crystal grains in the aluminum alloy are sufficient. This is because the effect of the addition cannot be increased even if the addition amount is increased further.
  • a raw material containing each elemental component of Al, Cu, Si, Mg, Fe, Mn and Cr so as to have the above-described predetermined ratio is prepared.
  • this raw material is put into a melting furnace such as a pre-furnace melting furnace or a closed melting furnace to melt them.
  • the melted raw material, that is, the molten aluminum alloy is subjected to a purification treatment such as a dehydrogenation treatment and a decontamination treatment as necessary.
  • the refined molten metal is poured into a predetermined mold or the like and solidified to form the molten aluminum alloy into an alloy ingot or the like.
  • solution treatment and aging treatment are performed as necessary.
  • the mechanical properties of the aluminum alloy casting can be improved by subjecting the aluminum alloy die casting to solution treatment, aging treatment, and the like.
  • the present invention will be specifically described below with reference to 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 having a clamping force of 135 tons (DC135EL manufactured by Toshiba Machine Co., Ltd.), die casting was performed at an injection speed of 1.0 m / second and a casting pressure of 60 MPa, and ASTM (American Society for Testing and Testing and Material) A round bar test piece conforming to the standard was prepared.
  • the tensile strength, elongation, and 0.2% proof stress of the round bar test piece in an as-cast state were measured using a universal testing machine (AG-IS 100 kN) manufactured by Shimadzu Corporation.
  • the alloy component of various alloys was measured using the solid-state emission spectrometer (Thermo Scientific ARL4460 by Thermo Fisher Scientific).
  • Table 1 shows die casting aluminum manufactured by adjusting the alloy component other than Cu to a certain ratio within the scope of the present invention and changing the Cu content ratio. It shows the alloy composition and mechanical properties (tensile strength, elongation, 0.2% proof stress).
  • Table 2 shows die casting aluminum manufactured by adjusting the alloy components other than Mg to a certain ratio within the scope of the present invention and changing the Mg content. It shows the alloy composition and mechanical properties (tensile strength, elongation, 0.2% proof stress).
  • Cu is contained in the range of 0.05% by weight or more and 0.70% by weight or less, and Mg is more than 0.50% by weight to 1.0% by weight or less. Therefore, in addition to being able to use recycled raw materials, it is possible to improve mechanical properties such as tensile strength and 0.2% proof stress while suppressing a decrease in elongation.
  • Cr having an effect of improving the corrosion resistance is contained in an amount of 0.10 wt% or more and 0.40 wt% or less. Moreover, deterioration of the corrosion resistance of the aluminum alloy for die casting can be prevented.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Extrusion Of Metal (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention concerne un alliage d'aluminium pour coulée sous pression qui peut être produit de manière économique et durable à l'aide d'une matière première recyclée et qui se prête également à une utilisation pour des pièces à sécurité critique ou autres d'automobile où les propriétés mécaniques sont améliorées sans compromettre la résistance à la corrosion ; et la coulée sous pression d'un alliage d'aluminium qui est coulé sous pression à l'aide dudit alliage. Plus spécifiquement, la présente invention est un alliage d'aluminium pour coulée sous pression et une coulée sous pression d'alliage d'aluminium l'utilisant, où l'alliage d'aluminium pour coulée sous pression est caractérisé en ce qu'il contient, en termes de % en poids, 0,05 % < Cu ≤ 0,70 %, 4,0 % ≤ Si ≤ 11,0 %, 0,50 % < Mg ≤ 1,0 %, 0,05 % ≤ Fe ≤ 0,60 %, Mn ≤ 0,80 %, et 0,10 % ≤ Cr ≤ 0,40 %, le reste comprenant du Al et d'inévitables impuretés.
PCT/JP2017/015176 2017-04-13 2017-04-13 Alliage d'aluminium pour coulée sous pression et coulée sous pression d'un alliage d'aluminium l'utilisant WO2018189869A1 (fr)

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PCT/JP2017/015176 WO2018189869A1 (fr) 2017-04-13 2017-04-13 Alliage d'aluminium pour coulée sous pression et coulée sous pression d'un alliage d'aluminium l'utilisant
JP2019512133A JP6852146B2 (ja) 2017-04-13 2017-04-13 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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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN110016594A (zh) * 2019-05-07 2019-07-16 中铝广西崇左稀钪新材料科技有限公司 一种具有高热导率的压铸稀土铝合金材料及其制备方法
CN111926221A (zh) * 2020-08-24 2020-11-13 山东弗泽瑞金属科技有限公司 压铸用高导热铝合金制备设备及其制备方法
CN111926222A (zh) * 2020-08-25 2020-11-13 肇庆南都再生铝业有限公司 一种耐热再生压铸铝合金及其制备方法
CN114182142A (zh) * 2021-12-09 2022-03-15 东北轻合金有限责任公司 一种Al-Si-Cu-Mg-Mn压铸铝合金及其制备方法
CN114686714A (zh) * 2022-04-06 2022-07-01 南昌大学 一种废杂铝制备耐磨轴瓦合金的方法
CN114959376A (zh) * 2021-02-18 2022-08-30 Oppo广东移动通信有限公司 压铸铝合金及其制备方法、电子设备结构件和电子设备
WO2023167312A1 (fr) * 2022-03-03 2023-09-07 日本軽金属株式会社 Alliage d'al-si pour pièce coulée, pièce coulée en alliage d'al-si et joint de pièce coulée en alliage d'al-si

Families Citing this family (1)

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CN115323225B (zh) * 2022-08-17 2023-02-03 吉林大学 一种耐蚀高强韧铸造铝硅合金及其制备方法

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110016594A (zh) * 2019-05-07 2019-07-16 中铝广西崇左稀钪新材料科技有限公司 一种具有高热导率的压铸稀土铝合金材料及其制备方法
CN110016594B (zh) * 2019-05-07 2020-09-22 广西国瑞稀钪新材料科技有限公司 一种具有高热导率的压铸稀土铝合金材料及其制备方法
CN111926221A (zh) * 2020-08-24 2020-11-13 山东弗泽瑞金属科技有限公司 压铸用高导热铝合金制备设备及其制备方法
CN111926222A (zh) * 2020-08-25 2020-11-13 肇庆南都再生铝业有限公司 一种耐热再生压铸铝合金及其制备方法
CN114959376A (zh) * 2021-02-18 2022-08-30 Oppo广东移动通信有限公司 压铸铝合金及其制备方法、电子设备结构件和电子设备
CN114182142A (zh) * 2021-12-09 2022-03-15 东北轻合金有限责任公司 一种Al-Si-Cu-Mg-Mn压铸铝合金及其制备方法
WO2023167312A1 (fr) * 2022-03-03 2023-09-07 日本軽金属株式会社 Alliage d'al-si pour pièce coulée, pièce coulée en alliage d'al-si et joint de pièce coulée en alliage d'al-si
CN114686714A (zh) * 2022-04-06 2022-07-01 南昌大学 一种废杂铝制备耐磨轴瓦合金的方法

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