JP6122932B2 - High toughness aluminum alloy casting - Google Patents
High toughness aluminum alloy casting Download PDFInfo
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- JP6122932B2 JP6122932B2 JP2015216530A JP2015216530A JP6122932B2 JP 6122932 B2 JP6122932 B2 JP 6122932B2 JP 2015216530 A JP2015216530 A JP 2015216530A JP 2015216530 A JP2015216530 A JP 2015216530A JP 6122932 B2 JP6122932 B2 JP 6122932B2
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- 238000005266 casting Methods 0.000 title claims description 28
- 229910000838 Al alloy Inorganic materials 0.000 title claims description 24
- 239000000203 mixture Substances 0.000 claims description 11
- 239000012535 impurity Substances 0.000 claims description 2
- -1 by mass ratio Substances 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- 239000010949 copper Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 239000011701 zinc Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000011825 aerospace material Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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Description
本発明はアルミニウム合金と高靱性アルミニウム合金鋳物に関するものである。 The present invention relates to an aluminum alloy and a high toughness aluminum alloy casting.
近年、自動車、産業機械等で使用されている鋼板、鋼材に代替するものとして、軽量なアルミニウム鋳物が注目されている。例えば自動車用のホイールでは、軽量性、意匠性等の観点から、アルミニウム鋳物（ＪＩＳ−ＡＣ４ＣＨ材）でも製作されてきている。 In recent years, lightweight aluminum castings have attracted attention as an alternative to steel plates and steel materials used in automobiles, industrial machines and the like. For example, wheels for automobiles have been manufactured from aluminum castings (JIS-AC4CH material) from the viewpoints of lightness and design.
しかしながら、従来のアルミニウム鋳物では伸びや引張強度等の点において、靱性、強度が十分でなく、小型部品への適用がなされているにすぎない。このため、より大型の物品であっても、軽量な特徴を生かして、高靱性、高強度な特性が得られるアルミニウム鋳物の実現が求められていた。 However, conventional aluminum castings are insufficient in toughness and strength in terms of elongation and tensile strength, and are only applied to small parts. Therefore, there has been a demand for an aluminum casting that can obtain high toughness and high-strength characteristics by taking advantage of its lightweight characteristics even for larger articles.
このような従来の事情から、これまでにも様々な組成を有する鋳物用アルミニウム合金とこれを用いた高靱性アルミニウム合金鋳物が検討されてきている。アルミニウム：Ａｌ以外の合金組成元素としてシリコン：Ｓｉについて注目し、その含有量を１質量％以上、さらに好ましくは３．５％以上で１２質量％までとし、マグネシウム：Ｍｇ、チタン：Ｔｉを含有させた組成が提案されている（特許文献１〜６）。また、これらのうち、Ｓｉを４〜１２質量％の高いレベルの含有量として、銅：Ｃｕを１から５質量％とした組成も提案されている（特許文献５および６）。 Under such circumstances, aluminum alloys for castings having various compositions and high toughness aluminum alloy castings using the same have been studied so far. Attention is paid to silicon: Si as an alloy composition element other than aluminum: Al, and the content thereof is 1% by mass or more, more preferably 3.5% to 12% by mass, and magnesium: Mg and titanium: Ti are contained. Have been proposed (Patent Documents 1 to 6). Further, among these, a composition in which Si is a high level content of 4 to 12% by mass and copper: Cu is 1 to 5% by mass has been proposed (Patent Documents 5 and 6).
さらに、アルミニウム鋳造用の合金としては、Ｓｉ：４〜１３質量％、Ｃｕ：１〜５質量％とともに、亜鉛：Ｚｎを２６〜４０質量％の極めて高い割合で含有する合金（特許文献７）や、航空・宇宙材料へも適用可能とするための鋳造用アルミニウム合金として、Ｃｕを３質量％以上含有するとともに、銀：Ａｇや亜鉛：Ｚｎの含有を必須とする組成も提案されている（特許文献８および９）。 Furthermore, as an alloy for aluminum casting, Si: 4 to 13% by mass, Cu: 1 to 5% by mass, an alloy containing zinc: Zn at a very high ratio of 26 to 40% by mass (Patent Document 7) and As a casting aluminum alloy that can be applied to aerospace materials, a composition that contains 3% by mass or more of Cu and that must contain silver: Ag or zinc: Zn has been proposed (patent) References 8 and 9).
しかしながら、従来の様々な提案にもかかわらず、これまでの鋳造アルミニウム合金においては、大型物品への適用も可能であって、例えば１５％以上の伸び特性とともに２７０Ｎ／ｍｍ２以上の引張強度等の靱性、強度にも優れたアルミニウム合金とその鋳物は実現されてきていない。 However, in spite of various conventional proposals, conventional cast aluminum alloys can also be applied to large articles, such as a tensile strength of 270 N / mm 2 or more together with an elongation characteristic of 15% or more. An aluminum alloy excellent in toughness and strength and its casting have not been realized.
そこで、本発明は、以上のとおりの従来の問題点を解決した、新しいアルミニウム合金と高靱性アルミニウム合金鋳物とを提供することを課題としている。 Then, this invention makes it a subject to provide the new aluminum alloy and high toughness aluminum alloy casting which solved the conventional problem as mentioned above.
本発明は次のことを特徴としている。 The present invention is characterized by the following.
すなわち、本発明の高靭性アルミニウム合金鋳物は、その組成において、質量比率で、
Ｃｕ：２．０〜４．０％
Ｓｉ：０．３〜０．４％
Ｍｇ：０．１５〜０．４０％
Ｆｅ：０．０８〜０．１８％
Ｍｎ：０．０１〜０．１％
Ｔｉ：０．１〜０．５％
残部：Ａｌ
および不可避的不純物からなり、引張り強さ２７０Ｎ／ｍｍ ２ 以上であり、かつ伸び１５％以上である。
That is, the high toughness aluminum alloy casting of the present invention has a mass ratio in its composition,
Cu: 2.0~ 4. 0%
Si: 0.3~ 0.4%
Mg: 0.15 to 0.40%
Fe: 0.08 to 0. 18%
Mn: 0.01 to 0.1 %
Ti: 0.1 to 0.5%
The rest: Al
It consists of inevitable impurities , has a tensile strength of 270 N / mm 2 or more, and an elongation of 15% or more.
また、本発明の高靱性のアルミニウム合金鋳物は、上記の組成を有し、ブリネル硬さ：ＨＢＷ（１０／５００）が７３〜８４の範囲内であることが好ましく考慮される。 Further, high-toughness aluminum alloy casting of the present invention has the above composition, Brinell hardness: HBW (10/500) that is preferably considered in the range of 73-84.
本発明によれば、軽量性というアルミニウム材の特長を生かし、しかも鋳物として大型物品、例えば、自動車や産業機器、さらには医療機器、ＣＴスキャン装置等への適用も可能な、伸び、引張強度の靱性、強度に優れたアルミニウム合金鋳物が実現可能とされる。 According to the present invention, it is possible to apply the advantages of the aluminum material such as light weight, and to be applicable to large articles such as automobiles, industrial equipment, medical equipment, CT scanning devices, etc. An aluminum alloy casting excellent in toughness and strength can be realized.
本発明の鋳造用のアルミニウム合金は前記のとおりの元素組成をもつものであるが、さらに以下に詳しく説明する。 The aluminum alloy for casting of the present invention has the elemental composition as described above, and will be described in detail below.
＜Ｓｉ＞
Ｓｉは、従来では比較的高い３〜１２質量％で含有される場合が多い。Ｓｉは、伸び等の靱性、湯流れ性等の鋳造性に影響を及ぼす。本発明では、従来例とは相違して極めて低レベルの０．４質量％以下で含有する。より好ましくは０．１〜０．３質量％の範囲内とする。
<Si>
Conventionally, Si is often contained at a relatively high content of 3 to 12% by mass. Si affects toughness such as elongation and castability such as molten metal flow. In the present invention, unlike the conventional example, it is contained at an extremely low level of 0.4% by mass or less. More preferably, it is in the range of 0.1 to 0.3% by mass.
＜Ｃｕ＞
Ｃｕは強度向上に有効である。本発明では２．０〜６．０質量％の範囲で含有する。ただ、Ｃｕは、耐食性に影響を及ぼすことから、好ましくは２．０〜４．０質量％の範囲内とする。
<Cu>
Cu is effective for improving the strength. In this invention, it contains in 2.0-6.0 mass%. However, since Cu influences corrosion resistance, it is preferably in the range of 2.0 to 4.0 mass%.
＜Ｍｇ＞
Ｍｇは、強度の向上に寄与する。本発明では、０．１５〜０．４０質量％の範囲で含有する。ただ、０．４０質量％を超えると靱性に影響を及ぼす。このため、より好ましくは、０．２〜０．３質量％の範囲内とする。
<Mg>
Mg contributes to improvement in strength. In this invention, it contains in 0.15 to 0.40 mass%. However, if it exceeds 0.40% by mass, the toughness is affected. For this reason, More preferably, it shall be in the range of 0.2-0.3 mass%.
＜Ｔｉ＞
Ｔｉは、結晶粒を微細化させ、靱性の向上に寄与する。本発明では、０．１〜０．５質量％の範囲で含有する。好ましくは、０．２５〜０．５０質量％の範囲内とする。
<Ti>
Ti contributes to refinement of crystal grains and improvement of toughness. In this invention, it contains in 0.1-0.5 mass%. Preferably, it is in the range of 0.25 to 0.50 mass%.
＜Ｆｅ＞
Ｆｅは、針状結晶を形成することから、０．２質量％を超えると靱性の低下を招く。このため０．２質量％以下とする。
<Fe>
Since Fe forms needle-like crystals, if it exceeds 0.2% by mass, toughness is reduced. For this reason, it is 0.2 mass% or less.
＜Ｍｎ＞
Ｍｎは、０．１質量％を超えると靱性を低下させる。本発明では０．１質量％以下とする。
<Mn>
When Mn exceeds 0.1 mass%, toughness will be reduced. In the present invention, it is 0.1% by mass or less.
また、本発明においては、Ｚｎ、Ｃｒ、Ｓｎ、Ｐｂ等は従来しばしば有効元素として含有されていたが、いずれも０．１質量％以下とする。 In the present invention, Zn, Cr, Sn, Pb and the like have been conventionally often contained as effective elements, but all of them are made to be 0.1% by mass or less.
本発明の高靱性アルミニウム合金鋳物については、前記のとおり、引張強さは、２７０Ｎ／ｍｍ２以上、より好ましくは２８０Ｎ／ｍｍ２以上である。また、伸びは１５％以上、より好ましくは１６％以上である。 The high-toughness aluminum alloy casting of the present invention, as described above, tensile strength, 270N / mm 2 or more, more preferably 280N / mm 2 or more. Further, the elongation is 15% or more, more preferably 16% or more.
また、ブリネル硬さ（ＨＢＷ（１０／５００））は、好ましくは７２〜７６の範囲内である。 The Brinell hardness (HBW (10/500)) is preferably in the range of 72 to 76.
以上のような高靱性アルミニウム合金鋳物は、通常は、従来同様に熱処理される。すなわち、鋳造後に焼入れ、焼なまし処理されて高靱性アルミニウム合金鋳物が得られることになる。 The high toughness aluminum alloy castings as described above are usually heat treated in the same manner as in the past. That is, a high toughness aluminum alloy casting is obtained by quenching and annealing after casting.
次に実施例を示し、さらに詳しく説明する。 Next, examples will be shown and described in more detail.
表１に示したアルミニウムを除いての各種元素組成のアルミニウム合金を鋳造した。その後、４８０℃以上の温度で焼入れし、静置後に２００℃以下の温度で焼なまし（炉内冷却）を行った。 Aluminum alloys having various elemental compositions excluding aluminum shown in Table 1 were cast. Then, it hardened at the temperature of 480 degreeC or more, and annealed at the temperature of 200 degrees C or less after standing (cooling in a furnace).
得られたアルミニウム合金鋳物について試験を行ったところ、表１の実施例のいずれの組成のアルミニウム合金鋳物は、供試材直径１３．８ｍｍにおいて、引張強さ２７０Ｎ／ｍｍ２以上、伸び１５％以上の強度と靱性に共に優れたものであることが確認された。 When the obtained aluminum alloy casting was tested, the aluminum alloy casting having any composition in the examples of Table 1 had a tensile strength of 270 N / mm 2 or more and an elongation of 15% or more at a specimen diameter of 13.8 mm. It was confirmed that it was excellent in both strength and toughness.
また、同様にして、組成（質量％）が、Ｃｕ：２．７、Ｓｉ：０．２０、Ｍｇ：０．２０、Ｆｅ：０．０８、Ｍｎ：０．０４、Ｔｉ：０．２０の合金鋳物（略称ＴＳＢ）についても試験を行い、既存のアルミ鋳物、アルミダイキャストおよび鉄鋳物の場合と比較した。その結果を表２に示した。また、図１には応力・ひずみ曲線図を示した。実施例品（ＴＳＢ）は、優れた引張強度・ひずみ特性を有していることが確認された。 Similarly, an alloy having a composition (mass%) of Cu: 2.7, Si: 0.20, Mg: 0.20, Fe: 0.08, Mn: 0.04, Ti: 0.20. The cast (abbreviated as TSB) was also tested and compared with existing aluminum castings, aluminum die casts and iron castings. The results are shown in Table 2. FIG. 1 shows a stress / strain curve diagram. It was confirmed that the example product (TSB) has excellent tensile strength / strain characteristics.
Claims (4)
Ｃｕ：２．０〜４．０％
Ｓｉ：０．３〜０．４％
Ｍｇ：０．１５〜０．４０％
Ｆｅ：０．０８〜０．１８％
Ｍｎ：０．０１〜０．１％
Ｔｉ：０．１〜０．５％
残部：Ａｌ
および不可避的不純物からなり、引張り強さ２７０Ｎ／ｍｍ ２ 以上であり、かつ伸び１５％以上であることを特徴とする高靭性アルミニウム合金鋳物。 In its composition, by mass ratio,
Cu: 2.0~ 4. 0%
Si: 0.3~ 0.4%
Mg: 0.15 to 0.40%
Fe: 0.08 to 0. 18%
Mn: 0.01 to 0.1 %
Ti: 0.1 to 0.5%
The rest: Al
And a high toughness aluminum alloy casting characterized by comprising inevitable impurities , having a tensile strength of 270 N / mm 2 or more and an elongation of 15% or more .
Ｍｇ：０．２〜０．３％
Ｔｉ：０．２５〜０．５０％
であることを特徴とする請求項１に記載の高靭性アルミニウム合金鋳物。 In mass ratio ,
Mg: 0.2-0.3%
Ti: 0.25 to 0.50%
High toughness aluminum alloy casting according to claim 1, characterized in that.
Ｚｎ：０．１％以下
Ｃｒ：０．１％以下
を含有することを特徴とする請求項１または２に記載の高靭性アルミニウム合金鋳物。 In mass ratio,
Zn: 0.1% or less Cr: 0.1% or less
High toughness aluminum alloy casting according to claim 1 or 2, characterized in that it contains.
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| JPS585979B2 (en) * | 1975-08-22 | 1983-02-02 | 昭和軽金属株式会社 | Aluminium-based aluminum alloy |
| JPS57120649A (en) * | 1981-01-16 | 1982-07-27 | Mitsubishi Keikinzoku Kogyo Kk | High strength aluminum alloy and its manufacture |
| JPS57203744A (en) * | 1981-06-08 | 1982-12-14 | Mitsubishi Keikinzoku Kogyo Kk | High strength aluminum alloy for casting |
| JPS5811760A (en) * | 1981-07-16 | 1983-01-22 | Hitachi Metals Ltd | Aluminum alloy for casting |
| JPS5864338A (en) * | 1981-10-12 | 1983-04-16 | Mitsubishi Keikinzoku Kogyo Kk | Aluminum alloy for high pressure solidification and casting |
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