JP2006176850A - High-strength aluminum alloy fin material for heat exchanger having excellent erosion resistance, and heat exchanger - Google Patents
High-strength aluminum alloy fin material for heat exchanger having excellent erosion resistance, and heat exchanger Download PDFInfo
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本発明は、耐エロージョン性に優れた熱交換器用の高強度アルミニウム合金フィン材および熱交換器に関する。 The present invention relates to a high-strength aluminum alloy fin material and a heat exchanger for heat exchangers excellent in erosion resistance.
一般に、自動車のラジエータ等に用いられている熱交換器においては、チューブ材やヘッダープレートにクラッド材が使用されている。このクラッド材は、例えば、ＡＡ３００３合金などのＡｌ−Ｍｎ合金芯材の一面に、ＡＡ４３４３ろう材やＡＡ４０４５ろう材が貼り合わされるとともに、他面にＡＡ７０７２合金が貼り合わされて構成されている。
また、熱交換器の剛性を高めるためにコア最外部に取付けられるサイドサポート材には、Ａ３００３合金の片面にＡｌ−Ｓｉ系合金ろう材を貼り合わせたクラッド材が使用されている。
更に、熱交換器用のフィン材は、チューブ材のＡｌ−Ｓｉ系合金ろう材によってチューブ材にろう付されるものであり、伝熱面積を広くすることで熱交換効率の向上を図っている。このようなフィン材には、ＡＡ１０５０合金などの純Ａｌ系合金や、ＡＡ３００３合金などのＡｌ−Ｍｎ合金やＡｌ−Ｆｅ系合金などが用いられている。
In general, in a heat exchanger used for an automobile radiator or the like, a clad material is used for a tube material or a header plate. For example, the clad material is configured such that an AA4343 brazing material or an AA4045 brazing material is bonded to one surface of an Al-Mn alloy core material such as an AA3003 alloy, and an AA7072 alloy is bonded to the other surface.
In addition, a clad material in which an Al-Si alloy brazing material is bonded to one side of an A3003 alloy is used as a side support material attached to the outermost part of the core in order to increase the rigidity of the heat exchanger.
Further, the fin material for the heat exchanger is brazed to the tube material by the Al—Si alloy brazing material of the tube material, and the heat exchange area is widened to improve the heat exchange efficiency. As such a fin material, a pure Al alloy such as AA1050 alloy, an Al-Mn alloy such as AA3003 alloy, an Al-Fe alloy, or the like is used.
ところで、近年の自動車の軽量化により自動車用の熱交換器もまた軽量化が求められており、これに対応すべくフィン材の薄肉化、高強度化が求められている。一方、フィン材の薄肉化により発生する問題としては、溶融したろうによる侵食（エロージョン）がある。エロージョンによってフィン材などに貫通孔が生じてしまうと、熱交換器として必要な強度が得られなくなったり、ひいては熱交換器としての構造が保てなくなったりするなどの問題が生じていた。 By the way, with the recent reduction in weight of automobiles, heat exchangers for automobiles are also required to be reduced in weight, and in order to cope with this, the fin material is required to be thinner and higher in strength. On the other hand, as a problem caused by thinning of the fin material, there is erosion due to molten wax. If a through-hole is generated in the fin material or the like due to erosion, there is a problem that the strength required for the heat exchanger cannot be obtained, and that the structure as the heat exchanger cannot be maintained.
前述のように、フィン材にはＡＡ１０５０合金、ＡＡ３００３合金などが用いられている。また、高強度化を達成するために、例えば、チューブ材やヘッダープレート、サイドサポート材、あるいは両面にろう材を貼り合わせてなるクラッドフィン材等には、Ａｌ−Ｍｎ−Ｓｉ−Ｃｕ系合金芯材が使用されたり、Ａｌ−Ｚｎ−Ｍｇ系犠牲材を貼り合わせた高強度材が開発されている。
また、ベアフィン材用のアルミニウム合金として、Ｍｎ：０．８−１．３％、Ｓｉ：０．２−０．７％からなる組成で熱間圧延温度や中間焼鈍温度あるいは最終冷間圧延率を規定した合金も開発されており、耐垂下性や犠牲陽極効果に優れているとのことである（特許文献１）。
このほか、ＭｎやＳｉを含有した合金には、特許文献２−５に記載された合金があり、強度や耐垂下性に優れると言われている。
Moreover, as an aluminum alloy for bare fin materials, a hot rolling temperature, an intermediate annealing temperature, or a final cold rolling rate with a composition of Mn: 0.8-1.3% and Si: 0.2-0.7%. The specified alloy has also been developed, and is said to be excellent in droop resistance and sacrificial anode effect (Patent Document 1).
In addition, as an alloy containing Mn or Si, there is an alloy described in Patent Document 2-5, which is said to be excellent in strength and sag resistance.
しかし、従来の熱交換器用のアルミニウム合金材料では、強度が不足したり、耐エロージョン性が不足するものであった。
本発明は、上記事情に鑑みてなされたものであって、耐エロージョン性に優れるとともに高強度な熱交換器用のアルミニウム合金フィン材および熱交換器を提供することを目的とする。
However, conventional aluminum alloy materials for heat exchangers are insufficient in strength or erosion resistance.
This invention is made | formed in view of the said situation, Comprising: It aims at providing the aluminum alloy fin material and heat exchanger for heat exchangers which are excellent in erosion resistance and are high intensity | strength.
上記の目的を達成するために、本発明は以下の構成を採用した。
本発明の耐エロージョン性に優れた熱交換器用の高強度アルミニウム合金フィン材は、質量％で、Ｓｃ：０．０００１％以上１．０％以下、Ｍｎ：０．００５％以上３．０以下、Ｚｎ：０．０１％以上８．０％以下を含有し、更に、Ｆｅ：０．０５％以上２．５％以下、Ｓｉ：０．０５％以上１．５％以下、Ｃｕ：０．０５％以上０．８％以下、Ｍｇ：０．０１％以上０．５％以下、Ｚｒ：０．００１％以上０．３％以下、のうちの１種または２種以上の元素を含有し、残部がＡｌおよび不可避的不純物からなることを特徴とする。
また、上記のフィン材においては、更に、Ｔｉ：０．０１％以上０．２５％以下、Ｃｒ：０．０１％以上０．１％以下、Ｖ：０．０１％以上０．１％以下、Ｎｉ：０．０１％以上２．０％以下、のうちの１種または２種以上の元素を含有することが好ましい。
また、本発明の熱交換器は、先のいずれかに記載のフィン材が備えられていることを特徴とする。
In order to achieve the above object, the present invention employs the following configuration.
The high-strength aluminum alloy fin material for heat exchangers excellent in erosion resistance of the present invention is, by mass%, Sc: 0.0001% to 1.0%, Mn: 0.005% to 3.0%, Zn: 0.01% to 8.0%, Fe: 0.05% to 2.5%, Si: 0.05% to 1.5%, Cu: 0.05% 0.8% or less, Mg: 0.01% or more and 0.5% or less, Zr: 0.001% or more and 0.3% or less, containing one or more elements, and the balance being It consists of Al and inevitable impurities.
In the fin material, Ti: 0.01% to 0.25%, Cr: 0.01% to 0.1%, V: 0.01% to 0.1%, Ni: It is preferable to contain one or more elements of 0.01% or more and 2.0% or less.
Moreover, the heat exchanger of this invention is equipped with the fin material in any one of the above, It is characterized by the above-mentioned.
上記のアルミニウム合金フィン材によれば、添加されたＳｃがろう付け熱処理によって合金組織中に固溶するとともに、Ｓｃの一部がＡｌ３Ｓｃなる組成の金属間化合物を形成してこの微細なＡｌ３Ｓｃが時効析出するので、フィン材の強度を高めることができる。また、ろう付け熱処理の昇温過程において再結晶粒径が粗大化して結晶粒界が減少し、これにより溶融ろうによるエロージョンの発生を抑制することができる。
また、添加されたＭｎが他の合金成分と化合して金属間化合物を形成、晶出若しくは析出するので、フィン材の強度を高めることができる。
更に、Ｚｎを添加することにより、Ｓｃの添加によって貴側に上昇した電位を卑にすることができ、チューブ材等とともに当該フィン材を用いて熱交換器を組み立てた場合にフィン材を他の部材の犠牲陽極材として用いることができる。
According to the aluminum alloy fin material, the added Sc is dissolved in the alloy structure by brazing heat treatment, and a part of Sc forms an intermetallic compound having a composition of Al 3 Sc to form this fine Al Since 3 Sc age-precipitates, the strength of the fin material can be increased. In addition, the recrystallized grain size becomes coarse in the temperature rising process of the brazing heat treatment, and the crystal grain boundaries are reduced, thereby suppressing the occurrence of erosion due to melting brazing.
Further, since the added Mn combines with other alloy components to form, crystallize or precipitate an intermetallic compound, the strength of the fin material can be increased.
Furthermore, by adding Zn, the potential raised to the noble side by the addition of Sc can be reduced, and when the heat exchanger is assembled using the fin material together with the tube material or the like, the fin material It can be used as a sacrificial anode material for members.
本発明によれば、耐エロージョン性に優れるとともに高強度な熱交換器用のアルミニウム合金フィン材および熱交換器を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, it is excellent in erosion resistance, and can provide the high intensity | strength aluminum alloy fin material for heat exchangers, and a heat exchanger.
以下、本発明の実施形態について詳細に説明する。
本実施形態の耐エロージョン性に優れた熱交換器用の高強度アルミニウム合金フィン材（以下、フィン材と表記）は、ＳｃとＭｎとＺｎとが含有され、更に、Ｆｅ、Ｓｉ、Ｃｕ、Ｍｇ、Ｚｒ、のうちの１種または２種以上の元素が含有され、更に残部がＡｌおよび不可避的不純物が含有されて構成されている。また必要に応じて、Ｔｉ、Ｃｒ、Ｖ、Ｎｉのうちの１種または２種以上の元素が含有されていても良い。
以下、フィン材の合金組成の限定理由について説明する。
Hereinafter, embodiments of the present invention will be described in detail.
The high-strength aluminum alloy fin material (hereinafter referred to as fin material) for heat exchangers excellent in erosion resistance according to the present embodiment contains Sc, Mn, and Zn, and further includes Fe, Si, Cu, Mg, One or two or more elements of Zr are contained, and the balance is further comprised of Al and inevitable impurities. Moreover, 1 type, or 2 or more types of elements among Ti, Cr, V, and Ni may be contained as needed.
Hereinafter, the reason for limiting the alloy composition of the fin material will be described.
「Ｓｃ」
スカンジウム（Ｓｃ）はフィン材の必須元素であり、ろう材熱処理の際に合金組織中に固溶してフィン材の機械的強度を向上させる。また、一部がＡｌ３Ｓｃなる組成の金属間化合物を形成してこの微細なＡｌ３Ｓｃが時効析出してフィン材の機械的強度を向上させる。更に、ろう付熱処理の昇温過程においてこのＳｃの作用により再結晶粒径が粗大化するため、溶融ろうによる侵食（エロージョン）が抑制される。Ｓｃの組成比は質量％で０．０００１％以上１．０％以下の範囲が好ましく、０．０００１％以上０．２％未満の範囲がより好ましい。Ｓｃの組成比が０．０００１％未満になると機械的強度の向上効果およびエロージョンの抑制効果が得られない。またＳｃの組成比が１．０％を越えると機械的強度の向上効果およびエロージョンの抑制効果が飽和してしまい、添加する効果が得られない。更に、Ｓｃの添加量が０．２％以上になると、冷間圧延時にクラックが発生しやすくなる等の問題が発生する。
"Sc"
Scandium (Sc) is an essential element of the fin material, and is dissolved in the alloy structure during the heat treatment of the brazing material to improve the mechanical strength of the fin material. Further, an intermetallic compound having a composition of part Al 3 Sc is formed, and the fine Al 3 Sc is aged to improve the mechanical strength of the fin material. Furthermore, since the recrystallized grain size becomes coarse due to the action of Sc in the temperature rising process of the brazing heat treatment, erosion due to the molten brazing is suppressed. The composition ratio of Sc is preferably in the range of 0.0001% to 1.0% by mass%, and more preferably in the range of 0.0001% to less than 0.2%. If the Sc composition ratio is less than 0.0001%, the effect of improving mechanical strength and the effect of suppressing erosion cannot be obtained. On the other hand, when the composition ratio of Sc exceeds 1.0%, the effect of improving the mechanical strength and the effect of suppressing erosion are saturated, and the effect of adding cannot be obtained. Furthermore, when the added amount of Sc is 0.2% or more, there arises a problem that cracks are likely to occur during cold rolling.
「Ｍｎ」
マンガン（（Ｍｎ）はＳｃとともにフィン材の必須元素であり、他の合金成分（具体的にはＳｉ）と化合してＡｌ−Ｍｎ−Ｓｉ化合物を形成し、この金属間化合物が晶出若しくは析出されて、ろう付け後のフィン材の機械的強度が向上される。また、金属間化合物の形成によって合金組織中のＳｉの固溶度が相対的に低下し、これによりフィン材の融点を向上させることができ、フィン材の耐熱性を高めることができる。Ｍｎの組成比は質量％で０．００５％以上３．０％以下の範囲が好ましく、０．３％以上２．０％以下の範囲がより好ましい。Ｍｎの組成比が０．００５％未満になると機械的強度の向上効果が得られない。またＭｎの組成比が３．０％を越えると機械的強度が高くなりすぎて鋳造性や圧延加工性が低下するので好ましくない。
"Mn"
Manganese ((Mn) is an essential element of the fin material together with Sc, and combines with other alloy components (specifically, Si) to form an Al—Mn—Si compound, which is crystallized or precipitated. As a result, the mechanical strength of the fin material after brazing is improved, and the solid solubility of Si in the alloy structure is relatively lowered due to the formation of intermetallic compounds, thereby improving the melting point of the fin material. The composition ratio of Mn is preferably 0.005% or more and 3.0% or less, and preferably 0.3% or more and 2.0% or less. If the Mn composition ratio is less than 0.005%, an effect of improving the mechanical strength cannot be obtained, and if the Mn composition ratio exceeds 3.0%, the mechanical strength becomes too high and casting is performed. Is preferable because of its reduced properties and rolling processability. There.
「Ｚｎ」
亜鉛（Ｚｎ）はＳｃ及びＭｎとともにフィン材の必須元素であり、Ｓｃの添加によって上昇した電位を卑にさせて、フィン材をチューブ材やクラッド材の芯材に対する犠牲陽極材として利用することを可能にする。Ｚｎの組成比は質量％で０．０１％以上８．０％以下の範囲が好ましく、０．２％以上８．０％以下の範囲がより好ましい。Ｚｎの組成比が０．０１％未満になると、電位を卑にする効果が得られない。またＺｎの組成比が８．０％を越えると、フィン材の自己耐食性が低下してしまう。一方、Ｚｎの組成比を０．２％以上にすることで、より十分に電位を卑にできる。
"Zn"
Zinc (Zn) is an essential element of the fin material together with Sc and Mn. The potential increased by the addition of Sc is reduced, and the fin material is used as a sacrificial anode material for the core material of the tube material or the clad material. enable. The composition ratio of Zn is preferably in the range of 0.01% to 8.0% by mass%, and more preferably in the range of 0.2% to 8.0%. When the composition ratio of Zn is less than 0.01%, the effect of lowering the potential cannot be obtained. On the other hand, if the Zn composition ratio exceeds 8.0%, the self-corrosion resistance of the fin material is lowered. On the other hand, when the composition ratio of Zn is 0.2% or more, the potential can be sufficiently reduced.
「Ｆｅ」
鉄（Ｆｅ）は、Ａｌ、Ｍｎ、Ｓｉとともに金属間化合物を形成して合金組織中に晶出または析出し、ろう付後のフィン材の強度を向上させる。金属間化合物としては、Ａｌ−Ｍｎ−Ｆｅ、Ａｌ−Ｆｅ−Ｓｉ、Ａｌ−Ｍｎ−Ｆｅ−Ｓｉ系化合物を例示できる。また、これらの金属間化合物の形成によって、合金組織中におけるＭｎやＳｉの固溶度を低下させ、フィン材の融点を向上させることができる。Ｆｅの組成比は質量％で０．０５％以上２．５％以下の範囲が好ましく、０．２％以上１．８％以下の範囲がより好ましい。Ｆｅの組成比が０．０５％未満では、フィン材の強度向上及び融点上昇の効果が得られない。またＦｅの組成比が２．５％を越えると、フィン材の腐食速度が高くなり、また巨大な晶出物が出現してフィン材の鋳造性や圧延性が低下する。
"Fe"
Iron (Fe) forms an intermetallic compound with Al, Mn, and Si and crystallizes or precipitates in the alloy structure, thereby improving the strength of the fin material after brazing. Examples of intermetallic compounds include Al—Mn—Fe, Al—Fe—Si, and Al—Mn—Fe—Si compounds. Moreover, the formation of these intermetallic compounds can reduce the solid solubility of Mn and Si in the alloy structure and improve the melting point of the fin material. The composition ratio of Fe is preferably in the range of 0.05% to 2.5% by mass%, and more preferably in the range of 0.2% to 1.8%. If the composition ratio of Fe is less than 0.05%, the effects of improving the strength of the fin material and increasing the melting point cannot be obtained. On the other hand, if the Fe composition ratio exceeds 2.5%, the corrosion rate of the fin material is increased, and a large crystallized product appears to deteriorate the castability and rollability of the fin material.
「Ｓｉ」
ケイ素（Ｓｉ）は、ＡｌおよびＭｎとともに、金属間化合物であるＡｌ−Ｍｎ−Ｓｉ化合物を形成して合金組織中に析出し、ろう付後のフィン材の強度を向上させる。またＳｉは、その一部が合金組織中に固溶してフィン材の強度を向上させる。Ｓｉの組成比は質量％で０．０５％以上１．５％以下の範囲が好ましく、０．４％以上１．２％以下の範囲がより好ましい。Ｓｉの組成比が０．０５％未満では、フィン材の強度向上の効果が得られない。またＳｉの組成比が１．５％を越えると、フィン材の融点が低下してろう付け時に溶融してしまい、更にフィン材の熱伝導性を低下させる。
"Si"
Silicon (Si), together with Al and Mn, forms an Al—Mn—Si compound, which is an intermetallic compound, and precipitates in the alloy structure, improving the strength of the fin material after brazing. A part of Si is dissolved in the alloy structure to improve the strength of the fin material. The composition ratio of Si is preferably in the range of 0.05% to 1.5% by mass%, and more preferably in the range of 0.4% to 1.2%. If the Si composition ratio is less than 0.05%, the effect of improving the strength of the fin material cannot be obtained. On the other hand, if the Si composition ratio exceeds 1.5%, the melting point of the fin material is lowered and melted at the time of brazing, and the thermal conductivity of the fin material is further lowered.
「Ｃｕ」
銅（Ｃｕ）は、合金組織中に固溶してフィン材の強度を向上させる。Ｃｕの組成比は質量％で０．０５％以上０．８％以下の範囲が好ましく、０．０７％以上０．２％以下の範囲がより好ましい。Ｃｕの組成比が０．０５％未満では、フィン材の強度向上の効果が得られない。またＣｕの組成比が０．８％を越えると、フィン材の融点が低下してろう付け時に溶融してしまう。
"Cu"
Copper (Cu) is dissolved in the alloy structure to improve the strength of the fin material. The composition ratio of Cu is preferably in the range of 0.05% to 0.8% by mass%, and more preferably in the range of 0.07% to 0.2%. If the composition ratio of Cu is less than 0.05%, the effect of improving the strength of the fin material cannot be obtained. On the other hand, if the Cu composition ratio exceeds 0.8%, the melting point of the fin material is lowered and melts during brazing.
「Ｍｇ」
マグネシウム（Ｍｇ）は、Ｃｕと同様に合金組織中に固溶してフィン材の強度を向上させる。Ｍｇの組成比は質量％で０．０１％以上０．５％以下の範囲が好ましく、０．０５％以上０．２％以下の範囲がより好ましい。Ｍｇの組成比が０．０１％未満では、フィン材の強度向上の効果が得られない。またＭｇの組成比が０．５％を越えると、フィン材の融点が低下してろう付け時に溶融してしまうとともに、Ｍｇとフラックスとの反応によりろう付け性が低下する。
"Mg"
Magnesium (Mg), like Cu, is dissolved in the alloy structure to improve the strength of the fin material. The composition ratio of Mg is preferably in the range of 0.01% to 0.5% by mass%, and more preferably in the range of 0.05% to 0.2%. If the composition ratio of Mg is less than 0.01%, the effect of improving the strength of the fin material cannot be obtained. On the other hand, if the Mg composition ratio exceeds 0.5%, the melting point of the fin material is lowered and melted at the time of brazing, and the brazing property is lowered due to the reaction between Mg and the flux.
「Ｚｒ」
ジルコニウム（Ｚｒ）は、ろう付の際の加熱によって微細な金属間化合物として分散析出して強度を向上させる。また、Ｓｃの添加効果を一層を高める作用がある。Ｚｒの組成比は質量％で０．００１％以上０．３％以下の範囲が好ましく、０．０５％以上０．１５％以下の範囲がより好ましい。Ｚｒの組成比が０．００１％未満では、フィン材の強度向上の効果が得られない。またＺｒの組成比が０．３％を越えると、フィン材の強度が高くなりすぎて成形性が低下したり、自己耐食性が低下したり、熱伝導性が低下したりする。
"Zr"
Zirconium (Zr) is dispersed and precipitated as a fine intermetallic compound by heating at the time of brazing and improves the strength. Moreover, there exists an effect | action which raises the addition effect of Sc further. The composition ratio of Zr is preferably in the range of 0.001% to 0.3% by mass%, and more preferably in the range of 0.05% to 0.15%. If the composition ratio of Zr is less than 0.001%, the effect of improving the strength of the fin material cannot be obtained. On the other hand, if the composition ratio of Zr exceeds 0.3%, the strength of the fin material becomes so high that the moldability is lowered, the self-corrosion resistance is lowered, or the thermal conductivity is lowered.
以上のように、Ｆｅ、Ｓｉ、Ｃｕ、Ｍｇ、Ｚｒはいずれも、フィン材の強度を向上させる元素なので、これらの内の１種または２種以上の元素を添加すれば良い。 As described above, since Fe, Si, Cu, Mg, and Zr are all elements that improve the strength of the fin material, one or more of these elements may be added.
「Ｔｉ、Ｃｒ、Ｖ」
チタン（Ｔｉ）、クロム（Ｃｒ）、バナジウム（Ｖ）はいずれも、ろう付の際の加熱によって微細な金属間化合物として分散析出して強度を向上させる。Ｔｉの組成比は質量％で０．０１％以上０．２５％以下の範囲が好ましく、０．０５％以上０．１５％以下の範囲がより好ましい。また、Ｃｒの組成比は質量％で０．０１％以上０．１％以下の範囲が好ましく、０．０２％以上０．０７％以下の範囲がより好ましい。更に、Ｖの組成比は質量％で０．０１％以上０．１％以下の範囲が好ましく、０．０２％以上０．０７％以下の範囲がより好ましい。各元素の組成比が下限未満になると、フィン材の強度向上の効果が得られない。また、各元素の組成比が上限を超えると、フィン材の強度が高くなりすぎて成形性が低下してしまう。
"Ti, Cr, V"
Titanium (Ti), chromium (Cr), and vanadium (V) are all dispersed and precipitated as fine intermetallic compounds by heating during brazing to improve strength. The composition ratio of Ti is preferably in the range of 0.01% to 0.25% by mass%, and more preferably in the range of 0.05% to 0.15%. Further, the Cr composition ratio is preferably in the range of 0.01% to 0.1% by mass%, and more preferably in the range of 0.02% to 0.07%. Furthermore, the composition ratio of V is preferably in the range of 0.01% to 0.1% by mass%, and more preferably in the range of 0.02% to 0.07%. If the composition ratio of each element is less than the lower limit, the effect of improving the strength of the fin material cannot be obtained. Moreover, when the composition ratio of each element exceeds the upper limit, the strength of the fin material becomes too high and the moldability is lowered.
「Ｎｉ」
ニッケル（Ｎｉ）は、金属間化合物として合金組織中に晶出または析出して、ろう付後のフィン材の強度を向上させる。Ｎｉの組成比は質量％で０．０１％以上２．０％以下の範囲が好ましく、０．２％以上１．１％以下の範囲がより好ましい。Ｎｉが０、０１％未満になると、フィン材の強度向上の効果が得られない。また、Ｎｉが２．０％を越えると、自己耐食性が低下する。
"Ni"
Nickel (Ni) crystallizes or precipitates in the alloy structure as an intermetallic compound, and improves the strength of the fin material after brazing. The composition ratio of Ni is preferably in the range of 0.01% to 2.0% by mass%, and more preferably in the range of 0.2% to 1.1%. When Ni is less than 0, 01%, the effect of improving the strength of the fin material cannot be obtained. On the other hand, if Ni exceeds 2.0%, the self-corrosion resistance decreases.
以上のように、Ｔｉ，Ｃｒ，Ｖ及びＮｉはいずれも、フィン材の強度を向上させる元素なので、必要に応じてこれらの内の１種または２種以上の元素を添加すれば良い。 As described above, since Ti, Cr, V, and Ni are all elements that improve the strength of the fin material, one or more of these elements may be added as necessary.
本実施形態のフィン材は、例えば、上記適正範囲の組成を有するアルミニウム合金を溶解、鋳造してインゴットを得、このインゴットに対して均質化を施す。続いて、熱間圧延、冷間圧延、中間焼鈍および冷間圧延を行なってフィン材とする。焼鈍温度は３００℃ないし４５０℃程度が好ましい。また最終冷間圧延率は１０％ないし４０％程度が好ましい。また連続鋳造法を採用しても良い。 For example, the fin material of the present embodiment is obtained by melting and casting an aluminum alloy having a composition in the appropriate range to obtain an ingot, and homogenizing the ingot. Subsequently, hot rolling, cold rolling, intermediate annealing, and cold rolling are performed to obtain a fin material. The annealing temperature is preferably about 300 ° C to 450 ° C. The final cold rolling rate is preferably about 10% to 40%. Moreover, you may employ | adopt a continuous casting method.
図１には、本発明の実施形態である自動車用のラジエータ（熱交換器）の分解斜視図を示す。図１において、符号１１はフィン（フィン材）、符号１２はチューブ、符号１３はヘッダー、符号１４はサイドサポートである。図１に示すラジエータは、フッ化物系フラックスを用いたろう付接合によってチューブ１２、フィン１１およびヘッダー１３が各々一体化され、更に樹脂タンクが機械的接合（かしめ加工）により取り付けられて製造される。ろう付け時の熱処理温度は、５９０℃ないし６１０℃程度が好ましく、保持時間は３分ないし１０分程度が好ましい。このときの熱処理によって、フィン材の合金組織中に各種の金属間化合物が生成するので、フィン材の強度を向上できるとともに耐エロージョン特性を向上させることができる。
FIG. 1 is an exploded perspective view of an automobile radiator (heat exchanger) according to an embodiment of the present invention. In FIG. 1,
下記表１に示す成分組成のアルミニウム合金を溶解鋳造してインゴットを製造し、このインゴットを均質化処理した後、熱間圧延及び冷間圧延を行い、更に昇温速度２℃／分、焼鈍温度３５０℃、焼鈍時間６０分の条件で中間焼鈍を行い、続いて最終冷間圧延率が３５％となる条件で冷間圧延を行なって、厚み０．０８ｍｍの圧延材（フィン材）を作製した。 An aluminum alloy having the composition shown in Table 1 below is melt-cast to produce an ingot. After homogenizing the ingot, hot rolling and cold rolling are performed, and the heating rate is 2 ° C./min, and the annealing temperature. Intermediate annealing was performed under the conditions of 350 ° C. and annealing time of 60 minutes, and then cold rolling was performed under the condition that the final cold rolling rate was 35%, thereby producing a rolled material (fin material) having a thickness of 0.08 mm. .
得られたフィン材について、耐エロージョン性の評価を行った。対エロージョン評価は、３００３合金からなる心材の片面にＡｌ−Ｓｉ系ろう材（Ｓｉの含有率１０％）が貼り合わされてなるブレージングシートに、コルゲート加工したフィン材を組み付け、これにフラックスとしてＫ１−３ＡｌＦ４−６を塗布した後、ろう付けに相当する熱処理（窒素ガス雰囲気中６００℃で３分保持し、１００℃／分で室温まで冷却）を行ない、その後、フィン材とブレージングシートの接合部分の断面観察を行なうことにより、ろうによるフィン材の最大侵食深さについて測定した。
また、フィン材の強度は、フィン材に対して、ろう付けに相当する熱処理（６００℃、３分）を行ない、その後、引張試験を行って評価した。
最大侵食深さおよび引張強度を表２に示す。
The obtained fin material was evaluated for erosion resistance. For erosion evaluation, corrugated fin material was assembled into a brazing sheet in which an Al—Si brazing material (Si content: 10%) was bonded to one side of a core material made of 3003 alloy, and K 1 was used as a flux. -3 After applying AlF 4-6 , heat treatment corresponding to brazing (holding at 600 ° C. for 3 minutes in a nitrogen gas atmosphere and cooling to room temperature at 100 ° C./minute) is performed, and then the fin material and brazing sheet The maximum erosion depth of the fin material by brazing was measured by observing the cross section of the joint.
The strength of the fin material was evaluated by performing a heat treatment (600 ° C., 3 minutes) corresponding to brazing on the fin material, and then performing a tensile test.
Table 2 shows the maximum erosion depth and tensile strength.
表２に示すように、本発明のフィン材は、比較例のフィン材と比べて、侵食深さが小さく、また引張強度にも優れていることがわかる。 As shown in Table 2, it can be seen that the fin material of the present invention has a smaller erosion depth and excellent tensile strength than the fin material of the comparative example.
１１…フィン（フィン材）、１２…チューブ、１３…ヘッダー、１４…サイドサポート
11 ... Fin (fin material), 12 ... Tube, 13 ... Header, 14 ... Side support
Claims (3)
更に、Ｆｅ：０．０５％以上２．５％以下、Ｓｉ：０．０５％以上１．５％以下、Ｃｕ：０．０５％以上０．８％以下、Ｍｇ：０．０１％以上０．５％以下、Ｚｒ：０．００１％以上０．３％以下、のうちの１種または２種以上の元素を含有し、残部がＡｌおよび不可避的不純物からなることを特徴とする耐エロージョン性に優れた熱交換器用の高強度アルミニウム合金フィン材。 Sc: 0.0001% or more and 1.0% or less, Mn: 0.005% or more and 3.0 or less, Zn: 0.01% or more and 8.0% or less,
Further, Fe: 0.05% to 2.5%, Si: 0.05% to 1.5%, Cu: 0.05% to 0.8%, Mg: 0.01% to 0. 5% or less, Zr: 0.001% or more and 0.3% or less, containing one or more elements, with the balance being made of Al and inevitable impurities, erosion resistance High-strength aluminum alloy fin material for excellent heat exchangers.
A heat exchanger comprising the fin material according to claim 1.
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| CN103060622A (en) * | 2012-12-31 | 2013-04-24 | 江阴新仁科技有限公司 | Method for producing Al-Mn-Zn-Sc aluminum alloy foil for automobile radiating fin by continuous roll casting |
| CN104233006A (en) * | 2014-07-14 | 2014-12-24 | 江苏格林威尔金属材料科技有限公司 | Novel aluminum alloy internal groove circular tube |
| CN105274405A (en) * | 2015-11-04 | 2016-01-27 | 绍兴市质量技术监督检测院 | Rare earth aluminum alloy and preparation method thereof |
| CN106282696A (en) * | 2015-05-19 | 2017-01-04 | 沈阳万龙源冶金新材料科技有限公司 | A kind of high-strength/tenacity aluminum alloy |
| WO2020064291A1 (en) | 2018-09-24 | 2020-04-02 | Aleris Rolled Products Germany Gmbh | Aluminium alloy fin stock material |
| CN111534723A (en) * | 2020-05-14 | 2020-08-14 | 宁波华源精特金属制品有限公司 | Generator base |
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| CN103060622A (en) * | 2012-12-31 | 2013-04-24 | 江阴新仁科技有限公司 | Method for producing Al-Mn-Zn-Sc aluminum alloy foil for automobile radiating fin by continuous roll casting |
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| WO2020064291A1 (en) | 2018-09-24 | 2020-04-02 | Aleris Rolled Products Germany Gmbh | Aluminium alloy fin stock material |
| CN112752856A (en) * | 2018-09-24 | 2021-05-04 | 爱励轧制产品德国有限责任公司 | Aluminum alloy fin blank |
| US20210310754A1 (en) * | 2018-09-24 | 2021-10-07 | Aleris Rolled Products Germany Gmbh | Aluminium alloy fin stock material |
| CN111534723A (en) * | 2020-05-14 | 2020-08-14 | 宁波华源精特金属制品有限公司 | Generator base |
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