WO2022130484A1 - Alliage d'aluminium et matériau de coulée en alliage d'aluminium - Google Patents

Alliage d'aluminium et matériau de coulée en alliage d'aluminium Download PDF

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Publication number
WO2022130484A1
WO2022130484A1 PCT/JP2020/046678 JP2020046678W WO2022130484A1 WO 2022130484 A1 WO2022130484 A1 WO 2022130484A1 JP 2020046678 W JP2020046678 W JP 2020046678W WO 2022130484 A1 WO2022130484 A1 WO 2022130484A1
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WO
WIPO (PCT)
Prior art keywords
aluminum alloy
mass
casting material
present
casting
Prior art date
Application number
PCT/JP2020/046678
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English (en)
Japanese (ja)
Inventor
晋也 三輪
宏 堀川
Original Assignee
日軽エムシーアルミ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 日軽エムシーアルミ株式会社 filed Critical 日軽エムシーアルミ株式会社
Priority to US18/039,829 priority Critical patent/US20240018632A1/en
Priority to PCT/JP2020/046678 priority patent/WO2022130484A1/fr
Priority to JP2022569355A priority patent/JP7472318B2/ja
Priority to CN202080107953.1A priority patent/CN116635549A/zh
Publication of WO2022130484A1 publication Critical patent/WO2022130484A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting

Definitions

  • the present invention relates to an aluminum alloy for casting and an aluminum alloy casting material composed of the aluminum alloy.
  • Aluminum alloy material is used for the housings of portable electronic devices and electronic terminals because it is lightweight and has an excellent texture.
  • the demand for thinness and weight reduction for these portable electronic devices is increasing year by year, and the aluminum alloy used for the housing is required to have higher strength.
  • smartphones are often stored in pockets when not in use, and bending stress is often applied in such situations. That is, it is indispensable that the aluminum alloy used for the housing of a portable electronic device has high strength and ductility (toughness) in addition to excellent castability.
  • Patent Document 1 Japanese Unexamined Patent Publication No. 48-32719
  • the excellent castability of an Al—Cu—Si-based or Al—Si—Cu—Mg-based alloy is utilized, and conventional casting is performed.
  • the weight of silicon is 7.5 to 1.2%
  • copper is 4.0 to 5.5%
  • magnesium is 0.2 to 1.0%.
  • a high-strength aluminum alloy for casting which is composed of the balance aluminum and impurities and has excellent castability, is disclosed.
  • Patent Document 2 Japanese Unexamined Patent Publication No. 60-57497
  • the weight is 6 More than% 13% silicon, 3% more than 5.5% copper, 1% more than 4% zinc, 0.2% more than 1% magnesium and more than 0.03% 1
  • a heat-resistant high-strength aluminum alloy containing up to% antimony and composed of the balance aluminum and impurities is disclosed.
  • the high-strength aluminum alloy for casting described in Patent Document 1 and the heat-resistant high-strength aluminum alloy described in Patent Document 2 are imparted with excellent mechanical properties in addition to excellent castability.
  • heat treatment such as artificial aging is indispensable.
  • the heat treatment process not only increases the manufacturing cost and manufacturing time, but also affects the dimensions and shape of the aluminum alloy casting material.
  • the housing of a portable electronic device is required to have high dimensional accuracy in addition to being thin, it is desirable to be able to realize high strength and excellent ductility without heat treatment.
  • an object of the present invention is to provide an aluminum alloy and an aluminum alloy casting material which have excellent castability and can exhibit high mechanical properties without heat treatment. To do. More specifically, it is an object of the present invention to provide an aluminum alloy and an aluminum alloy casting material having excellent castability, high 0.2% proof stress and excellent ductility without heat treatment. ..
  • the present invention Si: 7.0-9.0 mass%, Cu: 2.0-4.0% by mass, Mg: 0.8-1.2% by mass, Fe: 0.3 to 0.5% by mass, Mn: 0.3 to 0.5% by mass, Zn: 2.0 to 4.0% by mass, including The balance consists of Al and unavoidable impurities, We provide aluminum alloys, which are characterized by.
  • the aluminum alloy of the present invention Sr: 0.008 to 0.04% by mass, Be: 0.001 to 0.004% by mass, Ti: 0.05 to 0.005% by mass, B: 0.01 to 0.005% by mass, It is preferable to include any one or more of them.
  • the present invention Made of the aluminum alloy of the present invention 0.2% proof stress is 230MPa or more, The breaking elongation is 2.5% or more, Also provided are aluminum alloy castings, which are characterized by.
  • the aluminum alloy casting material of the present invention can exhibit a 0.2% proof stress of 230 MPa or more and a breaking elongation of 2.5% or more without performing heat treatment after forming a desired shape by casting.
  • the more preferable 0.2% proof stress is 240 MPa or more, and the more preferable breaking elongation is 3.0% or more.
  • an aluminum alloy and an aluminum alloy casting material which have excellent castability and can exhibit high mechanical properties without heat treatment. More specifically, according to the present invention, it is possible to provide an aluminum alloy and an aluminum alloy casting material having excellent castability, high 0.2% proof stress and excellent ductility without heat treatment. ..
  • the aluminum alloy of the present invention has Si: 7.0 to 9.0% by mass, Cu: 2.0 to 4.0% by mass, Mg: 0.8 to 1.2% by mass, Fe: 0.3. It is an aluminum alloy containing ⁇ 0.5% by mass, Mn: 0.3 to 0.5% by mass, Zn: 2.0 to 4.0% by mass, and the balance is Al and unavoidable impurities.
  • Si 7.0 to 9.0% by mass
  • Cu 2.0 to 4.0% by mass
  • Mg 0.8 to 1.2% by mass
  • Fe 0.3.
  • It is an aluminum alloy containing ⁇ 0.5% by mass
  • Mn 0.3 to 0.5% by mass
  • Zn 2.0 to 4.0% by mass
  • each component will be described in detail.
  • Essential additive element Si 7.0 to 9.0% by mass Si has the property of improving the castability of aluminum and also has the effect of improving mechanical properties such as tensile strength. This effect becomes remarkable when Si: 7.0% by mass or more. On the contrary, when Si: 9.0% by mass or more, eutectic Si and primary Si that crystallize tend to be coarsened. When these compounds are coarsened, they tend to be the starting point when they break, which tends to lead to a decrease in elongation. A more preferable amount of Si added is 7.5 to 8.5% by mass.
  • Cu 2.0-4.0% by mass
  • Cu has an action of improving mechanical properties such as tensile strength. This effect becomes remarkable when Cu: 2.0% by mass or more.
  • it is more than 4.0% by mass the Cu-based crystallized matter tends to be coarsened and the elongation tends to decrease. Further, as the Cu content increases, the corrosion resistance also decreases. Further, when the alumite treatment is performed, the color tends to be yellowish.
  • a more preferable amount of Cu added is 2.5 to 3.7% by mass, and more preferably 3.5% by mass or less.
  • Mg 0.8-1.2% by mass Mg has an action of improving mechanical properties such as tensile strength. This effect becomes remarkable when Mg: 0.8% by mass or more. On the contrary, if it exceeds 1.2% by mass, a coarse compound is likely to be formed, and the elongation is likely to decrease.
  • Si, Mg and Cu are elements that are precipitated as compounds by aging treatment and contribute to precipitation strengthening.
  • the aluminum alloy of the present invention is mainly used as a non-heat treatment material, and the strengthening mechanism by these elements is basic.
  • the solid solution is strengthened.
  • Fe 0.2 to 0.5% by mass Fe has an action of improving mechanical properties such as tensile strength. This effect becomes remarkable when Fe: 0.2% by mass or more. It also has the effect of preventing seizure in mold casting such as the die casting method. If it exceeds 0.5% by mass, it becomes easy to form a coarse needle-shaped Al- (Si, Fe, Mn) -based compound that is the starting point of fracture.
  • Mn 0.3 to 0.5% by mass
  • Mn has an action of improving mechanical properties such as tensile strength. This effect becomes remarkable when Mn: 0.3% by mass or more. It also has the effect of granulating Al- (Si, Fe, Mn) compounds. On the contrary, if it exceeds 0.5% by mass, the Al- (Si, Fe, Mn) -based compound tends to be coarsened.
  • Zn 2.0 to 4.0% by mass
  • Zn has an action of improving mechanical properties such as tensile strength. This effect becomes remarkable when Zn: 2.0% by mass or more. On the contrary, if it exceeds 4.0% by mass, stress corrosion cracking is likely to occur. In addition, discoloration and color unevenness are likely to occur when the anodic oxide film treatment is applied.
  • Be 0.001 to 0.004% by mass Be has an effect of forming an oxide film on the surface of the molten metal when it is melted and suppressing the depletion of other elements such as Mg. It also has the effect of suppressing the blackening of the surface of the casting. This effect becomes remarkable at Be 0.001% by mass or more. Even if it is added in an amount of more than 0.004% by mass, the effect is not improved so much, so it is preferably less than 0.004% by mass.
  • Ti 0.05 to 0.005% by mass Ti mainly contributes to toughness by refining the structure. If it is less than the lower limit, the effect is small, and even if it is contained above the upper limit, it is already sufficiently finely divided and has no effect, and if it is added excessively, it adversely affects ductility by forming coarse crystals. Therefore, it is necessary to limit within the above range.
  • B 0.01 to 0.005% by mass B mainly contributes to toughness by refining the structure. If it is less than the lower limit, the effect is small, and even if it is contained above the upper limit, it is already sufficiently finely divided and has no effect, and if it is added excessively, it adversely affects ductility by forming coarse crystals. Therefore, it is necessary to limit within the above range.
  • the method for producing the aluminum alloy of the present invention is not particularly limited as long as the effect of the present invention is not impaired, and various conventionally known production methods may be used.
  • the aluminum alloy casting material of the present invention is made of the aluminum alloy of the present invention, and is characterized by having a 0.2% proof stress of 230 MPa or more and a breaking elongation of 2.5% or more.
  • the more preferable 0.2% proof stress is 240 MPa or more, and the more preferable breaking elongation is 3.0% or more.
  • the excellent mechanical properties are basically realized by strict optimization of the composition, regardless of the shape and size of the aluminum alloy casting material, and regardless of the part and orientation of the aluminum alloy casting material. It has a target property.
  • the aluminum alloy casting material of the present invention can exhibit a 0.2% proof stress of 230 MPa or more and a breaking elongation of 2.5% or more without performing heat treatment such as aging treatment.
  • the shape and size of the aluminum alloy casting material are not particularly limited as long as the effects of the present invention are not impaired, and they can be used as various conventionally known members.
  • Examples of the member include an electronic terminal housing.
  • the method for producing the aluminum alloy casting material of the present invention is not particularly limited as long as the effect of the present invention is not impaired, and the aluminum alloy of the present invention may be used for casting by various conventionally known methods.
  • the casting material using the alloy of the present invention has excellent mechanical properties, particularly toughness, even without heat treatment, heat treatment such as aging treatment may be performed. When the aging treatment is performed, higher mechanical properties can be obtained by strengthening the precipitation of compounds such as Si, Mg, Cu and Zn.
  • Example Aluminum alloys having the compositions described in Examples 1 to 5 were melted, the casting pressure was 120 MPa, the molten metal temperature was 730 ° C, and the mold temperature was 170 ° C, and die casting was performed.
  • the mold shape is a plate shape of 55 mm ⁇ 110 mm ⁇ 3 mm.
  • the aluminum alloy has excellent die-casting properties, and a good aluminum alloy casting material (die-casting material) was obtained.
  • the unit of the numerical values shown in Table 1 is mass% concentration.
  • the 14B test piece specified in JIS-Z2241 was collected from each of the obtained cast aluminum alloys and subjected to a tensile test at room temperature.
  • the tensile strength, 0.2% proof stress and breaking elongation are shown in Table 2. It became the value of. Further, when the Rockwell hardness of the obtained cast aluminum alloy was measured, the values shown in Table 2 were obtained.
  • the cast aluminum alloy material is still die-cast and has not been heat-treated such as aging treatment.
  • ⁇ Comparison example A comparative aluminum alloy casting material (die-cast material) was obtained in the same manner as in Examples except that the melted materials were adjusted so as to have the components described as Comparative Examples 1 to 22 in Table 1. In addition, the tensile properties and Rockwell hardness were measured in the same manner as in Examples. The obtained values are shown in Table 2. If there is no description of the numerical value, it means that the measurement is not performed.
  • Example 1 to which Sr is added has higher tensile strength and elongation than Example 4 to which Sr is not added (the content of Sr is extremely small).
  • the aluminum alloy castings having the compositions of Comparative Examples 1 to 5 having a high content of Si, Cu and Mn show a high 0.2% proof stress, but the breaking elongation is 2.0% or less. .. Further, the aluminum alloy castings having the compositions of Comparative Examples 6 to 10 and Comparative Examples 13 to 19 having a high Fe content also do not reach 2.5% in elongation at break.
  • the hardness of the aluminum alloy casting material having the compositions of Comparative Example 11 in which the amount of Mg added is small and does not contain Zn and Comparative Example 12 in which the amount of Mg added is small is a low value, and sufficient strength can be obtained. You can see that it is not.
  • the aluminum alloy casting material having the composition of Comparative Example 20 having a low content of Si and Cu has a breaking elongation of 2.5% or more, but has a low proof stress of 0.2%.
  • Comparative Example 21 having a low content of Si and Zn and a high content of Cu and Mn has high tensile strength and 0.2% proof stress, but has a low breaking elongation of less than 2.5%. It is a value.
  • Comparative Example 22 in which the contents of Cu and Mn are high the elongation at break is as low as less than 2.5%, and the 0.2% proof stress does not reach 230 MPa.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Conductive Materials (AREA)
  • Continuous Casting (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

La présente invention concerne un alliage d'aluminium qui présente des propriétés de coulée exceptionnelles et qui peut présenter de hautes propriétés mécaniques sans être soumis à un traitement thermique, ainsi qu'un matériau de coulée en alliage d'aluminium. Plus spécifiquement, la présente invention concerne : un alliage d'aluminium qui présente des propriétés de coulée exceptionnelles et qui présente une limite conventionnelle d'élasticité à 0,2 % élevée et une ductilité exceptionnelle sans être soumis à un traitement thermique ; et un matériau de coulée en alliage d'aluminium. L'alliage d'aluminium selon la présente invention est caractérisé en ce qu'il contient 7,0 à 9,0 % en masse de Si, 2,0 à 4,0 % en masse de Cu, 0,8 à 1,2 % en masse de Mg, 0,3 à 0,5 % en masse de Fe, 0,3 à 0.5 % en masse de Mn, et 2,0 à 4,0 % en masse de Zn, le reste étant de l'Al et les inévitables impuretés.
PCT/JP2020/046678 2020-12-15 2020-12-15 Alliage d'aluminium et matériau de coulée en alliage d'aluminium WO2022130484A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US18/039,829 US20240018632A1 (en) 2020-12-15 2020-12-15 Aluminum alloy and aluminum alloy casting material
PCT/JP2020/046678 WO2022130484A1 (fr) 2020-12-15 2020-12-15 Alliage d'aluminium et matériau de coulée en alliage d'aluminium
JP2022569355A JP7472318B2 (ja) 2020-12-15 2020-12-15 アルミニウム合金及びアルミニウム合金鋳物材
CN202080107953.1A CN116635549A (zh) 2020-12-15 2020-12-15 铝合金和铝合金铸件材料

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/046678 WO2022130484A1 (fr) 2020-12-15 2020-12-15 Alliage d'aluminium et matériau de coulée en alliage d'aluminium

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WO2022130484A1 true WO2022130484A1 (fr) 2022-06-23

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Publication number Priority date Publication date Assignee Title
CN117646138A (zh) * 2024-01-30 2024-03-05 鸿劲新材料研究(南通)有限公司 一种隔爆防爆用铝合金材料及制备方法

Citations (5)

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JPS4713724B1 (fr) * 1968-02-20 1972-04-25
JPS4742513A (fr) * 1971-05-15 1972-12-16
CN108754250A (zh) * 2018-06-03 2018-11-06 深圳市鑫申新材料科技有限公司 一种高强度压铸铝合金及其制造方法
JP2020509232A (ja) * 2017-02-17 2020-03-26 ジエーエムカンパニー リミテッドＧａｍ Ｃｏ．，Ｌｔｄ． 高強度アルミニウム合金及び高強度アルミニウム合金鋳物
CN110952001A (zh) * 2019-12-19 2020-04-03 山东泰来铸铝科技有限公司 一种添加Mn、Zn的高强韧Al-Si-Cu-Mg铸造铝合金及其热处理方法

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Publication number Priority date Publication date Assignee Title
CN101671787A (zh) * 2009-10-23 2010-03-17 瑞立集团瑞安汽车零部件有限公司 一种自然去应力压铸铝合金及制备方法
JP2011208178A (ja) * 2010-03-29 2011-10-20 Mazda Motor Corp 鋳造用アルミニウム合金
JP5575028B2 (ja) * 2011-03-24 2014-08-20 株式会社豊田中央研究所 高強度アルミニウム合金、高強度アルミニウム合金鋳物の製造方法および高強度アルミニウム合金部材の製造方法
DE102015226709A1 (de) * 2014-12-24 2016-06-30 Denso Corporation Rippenmaterial aus Aluminiumlegierung für Wärmetauscher, Verfahren zu dessen Herstellung, und Wärmetauscher umfassend das Rippenmaterial

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4713724B1 (fr) * 1968-02-20 1972-04-25
JPS4742513A (fr) * 1971-05-15 1972-12-16
JP2020509232A (ja) * 2017-02-17 2020-03-26 ジエーエムカンパニー リミテッドＧａｍ Ｃｏ．，Ｌｔｄ． 高強度アルミニウム合金及び高強度アルミニウム合金鋳物
CN108754250A (zh) * 2018-06-03 2018-11-06 深圳市鑫申新材料科技有限公司 一种高强度压铸铝合金及其制造方法
CN110952001A (zh) * 2019-12-19 2020-04-03 山东泰来铸铝科技有限公司 一种添加Mn、Zn的高强韧Al-Si-Cu-Mg铸造铝合金及其热处理方法

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JP7472318B2 (ja) 2024-04-22
CN116635549A (zh) 2023-08-22
JPWO2022130484A1 (fr) 2022-06-23
US20240018632A1 (en) 2024-01-18

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