JP2002086293A - Highly corrosion resistant aluminum alloy composite material for heat exchanger and corrosion preventive aluminum alloy for heat exchanger - Google Patents
Highly corrosion resistant aluminum alloy composite material for heat exchanger and corrosion preventive aluminum alloy for heat exchangerInfo
- Publication number
- JP2002086293A JP2002086293A JP2000276499A JP2000276499A JP2002086293A JP 2002086293 A JP2002086293 A JP 2002086293A JP 2000276499 A JP2000276499 A JP 2000276499A JP 2000276499 A JP2000276499 A JP 2000276499A JP 2002086293 A JP2002086293 A JP 2002086293A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum alloy
- heat exchanger
- corrosion
- brazing
- composite material
- Prior art date
- Legal status (The legal status 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 status listed.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は自動車用熱交換器な
どに用いられる薄肉のアルミニウム合金複合材に関する
ものであり、さらに詳しくはろう付け法により冷媒通路
を形成する材料として用いられるアルミニウム合金複合
材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin aluminum alloy composite used for heat exchangers for automobiles, and more particularly to an aluminum alloy composite used as a material for forming a refrigerant passage by a brazing method. It is about.
【０００２】[0002]
【従来の技術】従来の自動車用熱交換器の接合組立で用
いられるろう材は、冷媒の流れが速い部分でのエロージ
ョン・コロージョンに対する耐性がなく流路を形成する
上で大きな問題となっている。また、従来、熱交換器用
の耐食性に優れたブレージングシートとしては、高流速
のアルカリ性環境での耐食性及び防食対策がとられたも
のは全くなく、アルミニウム合金材料のコロージョンだ
けでなく、エロージョン・コロージョンの問題を解決す
るためにろう材の成分を規定したものはない。2. Description of the Related Art A brazing filler metal used in a conventional heat exchanger for automobiles has a large problem in that it has no resistance to erosion / corrosion in a portion where the flow of a refrigerant is fast and has no resistance. . Conventionally, as a brazing sheet having excellent corrosion resistance for heat exchangers, none has been provided with corrosion resistance and anticorrosion measures in a high flow rate alkaline environment, and not only corrosion of aluminum alloy material, but also erosion and corrosion. There is no specification of the components of the brazing material to solve the problem.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、高流
速、アルカリ性環境下でのクーラントの使用によっても
優れた耐食性ないしは防食性を示す熱交換器用アルミニ
ウム合金複合材を提供することである。さらに本発明の
目的は、上記のアルミニウム合金複合材にクラッドする
のに好適なろう材アルミニウム合金を提供することであ
る。SUMMARY OF THE INVENTION An object of the present invention is to provide an aluminum alloy composite for a heat exchanger which exhibits excellent corrosion resistance or corrosion resistance even when a coolant is used at a high flow rate and in an alkaline environment. It is a further object of the present invention to provide a brazing aluminum alloy suitable for cladding the above aluminum alloy composite.
【０００４】[0004]
【課題を解決するための手段】上記問題を解決するため
に鋭意検討を行った結果、冷媒側が特にアルカリ液環境
下で、クーラント液機能が劣化し、さらには液流速が大
きい場合でのエロージョン・コロージョン現象を起こし
にくい画期的な、ろう付け組立てが可能なアルミニウム
合金複合材を開発するに至った。すなわち、本発明は、
（１）アルミニウム合金芯材の片側にＳｉが５ｗｔ％を
越え、１５ｗｔ％以下、Ｎｉ０．２〜２ｗｔ％を含有
し、残部がＡｌ及び不可避不純物からなるアルミニウム
合金をろう材としてクラッドし、該芯材の他の片面にＡ
ｌ−Ｚｎ系合金犠牲材をクラッドしたことを特徴とする
熱交換器用アルミニウム合金複合材、（２）Ｓｉが５ｗ
ｔ％を越え、１５ｗｔ％以下、Ｎｉ０．２〜２ｗｔ％を
含有し、残部がＡｌ及び不可避不純物からなることを特
徴とするろう材アルミニウム合金、及び（３）アルミニ
ウム合金芯材がＦｅ０．０５〜０．８ｗｔ％、Ｍｎ０．
０５〜２．０ｗｔ％を含有し、Ｓｉ０．０５〜１．２ｗ
ｔ％、Ｃｕ０．００３〜１．２ｗｔ％、Ｍｇ０．０３〜
０．５ｗｔ％、Ｎｉ０．０５〜２．０ｗｔ％、Ｃｒ０．
０３〜０．３ｗｔ％、Ｚｒ０．０３〜０．３ｗｔ％、Ｔ
ｉ０．０３〜０．３ｗｔ％の内１種または２種以上を含
有し、残部Ａｌと不可避不純物からなるアルミニウム合
金である（１）項記載の熱交換器用アルミニウム合金複
合材を提供するものである。本発明者は、上記問題を解
決するためにＡｌ−Ｓｉろう材にＮｉ添加量を０．２〜
２ｗｔ％含有させ、ろう付け性とアルカリ性環境での耐
食性を向上させる効果をバランスよく発現することを見
出した。これにより、例えクーラントが高アルカリ性を
保持したままでしかも使用環境下によっては液機能が劣
化し、さらには液流速の大きい環境下になった場合で
も、本発明のろう材はコロージョン、エロージョン・コ
ロージョンを起こしにくく、長期間の接合部の機能を維
持し、耐食性を大幅に向上させることができる。さら
に、本発明は、あらゆる使用環境を想定して芯材組成も
同時に規定している。即ち、従来合金に比べ強度、自己
腐食性のバランスを向上させることで、さらにコロージ
ョン、エロージョン・コロージョンを抑制することがで
きる。As a result of intensive studies to solve the above problems, the coolant function deteriorates especially when the refrigerant side is in an alkaline environment, and furthermore, the erosion and erosion when the liquid flow rate is large is increased. We have developed an epoch-making aluminum alloy composite that is less likely to cause corrosion and that can be assembled by brazing. That is, the present invention
(1) One side of an aluminum alloy core material is clad with an aluminum alloy containing more than 5 wt%, not more than 15 wt%, containing 0.2 to 2 wt% of Ni and the balance of Al and inevitable impurities as a brazing material. A on the other side of the material
Aluminum alloy composite for heat exchangers, characterized by cladding a sacrificial l-Zn alloy, (2) 5 watts of Si
(b) a brazing filler metal aluminum alloy containing at least 15% by weight, not more than 15% by weight, Ni of 0.2 to 2% by weight, and the balance consisting of Al and unavoidable impurities; 0.8 wt%, Mn0.
0.05-2.0 wt%, Si 0.05-1.2w
t%, Cu 0.003 to 1.2 wt%, Mg 0.03 to
0.5 wt%, Ni 0.05-2.0 wt%, Cr0.
03-0.3 wt%, Zr 0.03-0.3 wt%, T
(1) An aluminum alloy composite material for a heat exchanger according to the above (1), which is an aluminum alloy containing one or more of 0.03 to 0.3 wt% and the balance being Al and unavoidable impurities. . The present inventor has proposed that the amount of Ni added to the Al-Si brazing material be 0.2 to 0.2 to solve the above problem.
It has been found that by containing 2 wt%, the effect of improving the brazing properties and the corrosion resistance in an alkaline environment is well expressed. Thereby, even if the coolant keeps high alkalinity and the liquid function is deteriorated depending on the use environment, and even if the environment becomes large in the liquid flow velocity, the brazing material of the present invention can be used for corrosion, erosion and corrosion. , The function of the joint for a long time is maintained, and the corrosion resistance can be greatly improved. Further, in the present invention, the composition of the core material is also specified at the same time assuming any use environment. That is, corrosion, erosion and corrosion can be further suppressed by improving the balance between strength and self-corrosion as compared with the conventional alloy.
【０００５】[0005]
【発明の実施の形態】次に本発明でろう材への添加元素
の添加量の規定理由を以下に記載する。ＳｉはＡｌと共
存して低融点化合物となるので、良好な流動性を有する
ろう材を得るための基本的組成である。ろう材中のＳｉ
含有量が、ろう材全重量あたり５ｗｔ％未満であると、
ろう材融点が高くなるので、所定の流動性を得ることが
できず、ろう付け性が低下する。一方、ろう材中のＳｉ
含有量が１５ｗｔ％を越える場合であっても、同様に、
ろう材の融点が高くなって、所定の流動性を得ることが
できない。また、粗大な初晶Ｓｉが生成されるので、ろ
う材の加工性が阻害されてしまう。従って、ろう材中の
Ｓｉ含有量は、ろう材全重量あたり５乃至１５ｗｔ％と
する。次にＮｉの添加量に関して述べると、冷却液が、
高アルカリ性（ｐＨ８〜１１レベル）であることに加え
てさらに液流速が高い環境下では、ろう付け部表面に形
成される水酸化皮膜が安定に付与されていることが重要
で、これによって芯材などの腐食進行が抑制される。特
に腐食表面に生成する水酸化皮膜が緻密で安定強固な膜
で長期間維持することが必要で、Ｎｉを添加することに
よってその効果が顕著であることが確認された。BEST MODE FOR CARRYING OUT THE INVENTION Next, the reason for defining the amount of an additive element to a brazing filler metal in the present invention will be described below. Since Si becomes a low-melting compound in combination with Al, it is a basic composition for obtaining a brazing material having good fluidity. Si in brazing material
When the content is less than 5 wt% based on the total weight of the brazing filler metal,
Since the melting point of the brazing material is high, a predetermined fluidity cannot be obtained, and the brazing property is reduced. On the other hand, Si in brazing material
Even when the content exceeds 15 wt%, similarly,
The melting point of the brazing filler metal becomes so high that a predetermined fluidity cannot be obtained. Further, since coarse primary crystal Si is generated, workability of the brazing material is impaired. Therefore, the content of Si in the brazing material is set to 5 to 15 wt% based on the total weight of the brazing material. Next, regarding the addition amount of Ni, the cooling liquid is:
In an environment in which the liquid flow rate is high in addition to the high alkalinity (pH 8 to 11), it is important that the hydroxide film formed on the surface of the brazing portion is stably provided. Corrosion progress such as is suppressed. In particular, it is necessary that the hydroxide film formed on the corroded surface is a dense, stable and strong film that needs to be maintained for a long time, and it has been confirmed that the effect is remarkable by adding Ni.
【０００６】上記高アルカリ液の高流速環境下では、ア
ルミニウム合金の固溶体マトリックス表面に腐食の初期
の段階から早期に、Ｎｉ系水酸化皮膜及びＡｌ系水酸化
皮膜の複合皮膜が形成される。これは、緻密で安定強固
な皮膜であり、高アルカリ液環境の高流速環境下でも溶
解及び脱落が少なく、耐アルカリ性の向上を促進させる
働きが付与されるのである。Ｎｉ添加量０．１ｗｔ％未
満ではＮｉ含有化合物が少なく、固溶体マトリックス表
面での十分な水酸化皮膜を得ることができない。２．０
ｗｔ％を越えると鋳造時に割れを発生し易くなるという
問題が生じる。望ましくは、０．５〜１．５ｗｔ％がよ
い。[0006] Under the environment of the high alkali solution at a high flow rate, a composite film of a Ni-based hydroxide film and an Al-based hydroxide film is formed on the surface of the solid solution matrix of the aluminum alloy at an early stage from the initial stage of corrosion. This is a dense, stable and strong film, has little dissolution and falling off even under a high flow rate environment of a high alkali liquid environment, and has a function of promoting the improvement of alkali resistance. If the amount of Ni added is less than 0.1 wt%, the amount of the Ni-containing compound is small, and a sufficient hydroxide film on the surface of the solid solution matrix cannot be obtained. 2.0
If the content exceeds wt%, there is a problem that cracks easily occur during casting. Desirably, the content is 0.5 to 1.5 wt%.
【０００７】次に芯材の各元素の添加理由についてとそ
の添加範囲の限定理由について述べる。Ｍｎはろう付け
後にマトリックス中に固溶し、強度向上に効果がある。
さらに本発明のろう材との組み合わせで使用する場合に
は、Ｍｎ量を本発明で規定することは上記腐食対策上も
非常に有効である。Ｍｎ添加量を０．０５〜２．０ｗｔ
％としたのは、０．０５ｗｔ％未満では強度向上効果が
なく、２．０ｗｔ％を越えると加工性が低下する問題が
発生する。望ましくは０．３〜１．５ｗｔ％とするのが
よい。芯材にＦｅ、Ｎｉを積極添加することで、芯材に
元々Ｚｎは添加されていないが、犠牲材とのクラッド複
合材として利用すればＺｎが芯材に拡散するため、熱交
換器として使用する時点では芯材Ｚｎ、Ｆｅ、Ｎｉが含
有された組成となる。これにより、アルカリ液の高流速
環境に対して耐食性を向上させる効果がある。Ｆｅ添加
量が０．０５ｗｔ％未満では効果がなく、０．８ｗｔ％
を越えると酸性側、アルカリ側での耐食性バランスが低
下する。望ましくは０．１〜０．４ｗｔ％がよい。Ｎｉ
添加量は、０．０５〜２ｗｔ％添加することで、０．０
５ｗｔ％未満では上記効果が少なく、２ｗｔ％を越える
と圧延性が劣化するのでよくない。Ｓｉ添加量が０．０
５ｗｔ％未満では強度向上効果がなく、１．２ｗｔ％を
越えると単体Ｓｉによる深い孔食を引き起こすおそれが
ある。望ましくは０．３〜０．９ｗｔ％とするのがよ
い。Ｃｕ添加量を０．００３〜１．２ｗｔ％としたの
は、０．００３ｗｔ％未満では上記効果がなく、１．２
ｗｔ％を越えると芯材の自己耐食性が低下し、粒界腐食
が助長される問題が発生するからである。なお、使用環
境に応じて望ましくは０．００５〜０．５ｗｔ％であ
る。Ｍｇは芯材のＳｉとともにＭｇ２Ｓｉと化合物を時
効析出することで強度向上効果がある。Ｍｇ添加量が
０．０３ｗｔ％未満では、強度向上の効果がなく、０．
５ｗｔ％を越えるとろう付け加熱時に芯材の片面にクラ
ッドしたろう材側表面にＭｇが拡散し、フラックスを使
用した場合にはこれと反応してろう付け不良を発生する
おそれがでてくる。望ましくは０．０８〜０．２５ｗｔ
％。その他の元素は諸特性を低下させない限り、添加し
ても構わない。Next, reasons for adding each element of the core material and reasons for limiting the range of addition will be described. Mn forms a solid solution in the matrix after brazing and is effective in improving the strength.
Further, when used in combination with the brazing material of the present invention, defining the amount of Mn in the present invention is very effective also in the above-mentioned measures against corrosion. Mn addition amount of 0.05 to 2.0 wt
When the content is less than 0.05 wt%, there is no strength improvement effect, and when it exceeds 2.0 wt%, there is a problem that the workability is reduced. Desirably, the content is 0.3 to 1.5 wt%. Zn is not originally added to the core material by actively adding Fe and Ni to the core material, but if used as a clad composite material with a sacrificial material, Zn diffuses into the core material, so it is used as a heat exchanger At this point, the composition contains the core materials Zn, Fe, and Ni. Thereby, there is an effect of improving corrosion resistance against a high flow rate environment of the alkaline liquid. There is no effect if the Fe content is less than 0.05 wt%, and 0.8 wt%
If it exceeds 300, the corrosion resistance balance between the acidic side and the alkaline side is reduced. Desirably, the content is 0.1 to 0.4 wt%. Ni
The amount of addition is 0.05 to 2 wt%,
If it is less than 5 wt%, the above effect is small, and if it exceeds 2 wt%, the rollability deteriorates, which is not good. When the amount of Si added is 0.0
If it is less than 5 wt%, there is no strength improving effect, and if it exceeds 1.2 wt%, there is a possibility that deep pitting corrosion may be caused by simple Si. Desirably, the content is 0.3 to 0.9 wt%. The reason why the addition amount of Cu is set to 0.003 to 1.2 wt% is that the above effect is not obtained when the Cu content is less than 0.003 wt%,
If the amount exceeds wt%, the self-corrosion resistance of the core material is reduced, and a problem of promoting intergranular corrosion occurs. In addition, it is desirably 0.005 to 0.5 wt% depending on the use environment. Mg has an effect of improving strength by precipitating Mg 2 Si and a compound together with Si of the core material. If the amount of added Mg is less than 0.03 wt%, there is no effect of improving the strength, and
If the content exceeds 5% by weight, Mg diffuses into the brazing material side surface clad on one surface of the core material at the time of heating by brazing, and when a flux is used, it may react with this to cause brazing failure. Desirably 0.08 to 0.25 wt
%. Other elements may be added as long as various properties are not deteriorated.
【０００８】Ｃｒ、Ｚｒ、Ｔｉも各々０．０３〜０．３
ｗｔ％で規定することで、Ｆｅ同様の効果が期待され
る。０．０３ｗｔ％未満ではその効果がなく、０．３ｗ
ｔ％を越えると、鋳造時の凝固割れを誘発するおそれが
ある。望ましくは各々０．０８〜０．２５ｗｔ％がよ
い。その他元素は諸特性を低下させない限り、添加して
も構わない。ろう材及び芯材の製造方法については、鋳
造はＤＣ法、連続鋳造ストリップ（キャスター）等常法
によって行うことができ、限定されない。均質化処理条
件、熱間圧延、冷間圧延、中間焼鈍条件等常法によって
行うことができ、特に限定されるものではない。本発明
における犠牲材としては、例えばＡｌ−Ｚｎ系合金等が
使用できる。またＡｌ−Ｚｎ系犠牲材にその他元素を犠
牲効果を低下させない限り添加しても構わない。ろう材
の接合方法も本発明で規定するクラッド圧延法以外に、
溶射法、粉末塗布法によってもよい。本発明において、
アルミニウム合金複合材の芯材の厚さとその上にクラッ
ドするＡｌ−Ｚｎ系合金犠牲材及びろう材の層厚は特に
制限するものではなく通常のものと異ならない。例え
ば、アルミニウム合金複合材の厚さは好ましくは０．１
〜１ｍｍ、Ａｌ−Ｚｎ系合金犠牲材又はろう材のクラッ
ド率は、前記複合材の全厚みに対し、好ましくは、それ
ぞれ、５〜１５％、５〜１５％である。本発明のアルミ
ニウム合金複合材は、ラジエーター、ヒーターチューブ
管の他に、ラジエーター、ヒーターのヘッダープレート
にも使用でき、その他本発明の目的と同様であればいか
なる部材としても充分に使用できる。[0008] Cr, Zr and Ti are also 0.03-0.3 each.
The effect similar to that of Fe is expected by specifying the content in wt%. If the content is less than 0.03% by weight, the effect is not obtained.
If it exceeds t%, solidification cracking during casting may be induced. Desirably, each content is 0.08 to 0.25 wt%. Other elements may be added as long as various properties are not deteriorated. The method for producing the brazing material and the core material can be performed by a conventional method such as a DC method and a continuous casting strip (caster), and is not limited. Homogenization treatment conditions, hot rolling, cold rolling, intermediate annealing conditions and the like can be performed by conventional methods, and are not particularly limited. As the sacrificial material in the present invention, for example, an Al—Zn-based alloy or the like can be used. Further, other elements may be added to the Al-Zn-based sacrificial material as long as the sacrificial effect is not reduced. In addition to the brazing material joining method defined by the present invention,
Thermal spraying or powder coating may be used. In the present invention,
The thickness of the core material of the aluminum alloy composite material and the thickness of the Al-Zn-based alloy sacrificial material and the brazing material clad thereon are not particularly limited, and are not different from ordinary ones. For example, the thickness of the aluminum alloy composite is preferably 0.1
The cladding ratio of the Al-Zn alloy sacrificial material or brazing material is preferably 5 to 15% and 5 to 15%, respectively, based on the total thickness of the composite material. The aluminum alloy composite material of the present invention can be used not only for a radiator and a heater tube but also for a radiator and a header plate of a heater.
【０００９】[0009]
【実施例】次に本発明の実施例について詳細に説明す
る。表１に示す組成のろう材と芯材と犠牲材の組合わせ
合金２８種類を常法により金型鋳造により鋳造して、各
々両面面削後、犠牲材は５００℃で熱間圧延を開始し、
厚さ５ｍｍに圧延した。芯材は５２０℃×６時間の均質
化処理を行い、面削で厚さ４０ｍｍに仕上げた。即ち、
犠牲材の複合材全体にクラッド率が１０％となるように
した。ろう材、芯材、犠牲材の３枚をこの順に重ねて、
５００℃で熱間圧延を開始し、厚さ３．５ｍｍの３層の
クラッド材とした。その後冷間圧延により０．３５ｍｍ
厚とし、３６０℃×２時間の中間焼鈍を施して最終的に
は厚さ０．２５ｍｍまで冷間圧延し、Ｈ１４材のアルミ
ニウム合金複合材の試料とした。このアルミニウム合金
複合材試料の全厚に対し、犠牲材のクラッド率は１０
％、ろう材のクラッド率は１０％である。本発明合金複
合材（No.１〜２０）、比較例合金複合材（No.２１〜２
７）及び従来合金複合材（No.２８）とした。これらサ
ンプルに下記の腐食試験を実施し、ろう材部の腐食厚み
を測定した。これら結果を表２に示す。 （腐食試験の液条件） アルカリ性側エロージョン試験 液種：１ｐｐｍ Ｃｕイオン、３０ｐｐｍＦｅイオン、
６０ｐｐｍ硫酸イオン、１９５ｐｐｍＣｌイオンを含む
溶液にＮａＯＨを添加してｐＨ１０．５に調整した腐食
液を使用。 試験条件：ノズルから試料までの垂直距離：１０ｍｍで
あり、流速１０ｍ／ｓで８０℃で１０日間の連続試験を
行った。Next, embodiments of the present invention will be described in detail. 28 combinations of brazing alloys, core materials, and sacrificial materials having the compositions shown in Table 1 were cast by die casting in a conventional manner, and after both surfaces were cut, the sacrificial material was hot-rolled at 500 ° C. ,
It was rolled to a thickness of 5 mm. The core material was homogenized at 520 ° C. for 6 hours, and finished to a thickness of 40 mm by facing. That is,
The cladding ratio was set to 10% for the entire composite material of the sacrificial material. Three pieces of brazing material, core material, sacrificial material are stacked in this order,
Hot rolling was started at 500 ° C. to obtain a three-layer clad material having a thickness of 3.5 mm. 0.35mm after cold rolling
It was subjected to intermediate annealing at 360 ° C. for 2 hours and finally cold-rolled to a thickness of 0.25 mm to obtain a sample of an aluminum alloy composite material of H14. The cladding ratio of the sacrificial material was 10 relative to the total thickness of the aluminum alloy composite sample.
%, And the cladding ratio of the brazing material is 10%. Alloy composites of the present invention (Nos. 1 to 20), Comparative alloy composites (Nos. 21 to 2)
7) and a conventional alloy composite material (No. 28). The following corrosion tests were performed on these samples, and the corrosion thickness of the brazing material was measured. Table 2 shows the results. (Liquid conditions for corrosion test) Alkaline erosion test Liquid type: 1 ppm Cu ion, 30 ppm Fe ion,
A corrosion solution adjusted to pH 10.5 by adding NaOH to a solution containing 60 ppm sulfate ion and 195 ppm Cl ion is used. Test conditions: The vertical distance from the nozzle to the sample was 10 mm, and a continuous test was performed at 80 ° C. for 10 days at a flow rate of 10 m / s.
【００１０】[0010]
【表１】 [Table 1]
【００１１】[0011]
【表２】 [Table 2]
【００１２】表２から明らかなように、本発明合金複合
材No.１〜２０は高アルカリ性環境下で液流速の大きい
エロージョン試験でも孔食深さは７０μｍ以下と耐食性
が良好であった。一方、合金組成が本発明の範囲から外
れる比較例合金複合材No.２１〜２７は、腐食が顕著に
進行しており、貫通孔を発生するに至っている。以上か
ら明らかなように、本発明によるアルミニウム合金複合
材はアルカリ性側の腐食環境においても優れた耐食性を
得るのである。As is clear from Table 2, the alloy composite materials Nos. 1 to 20 of the present invention exhibited good pitting corrosion depth of 70 μm or less even in an erosion test with a high liquid flow rate in a highly alkaline environment. On the other hand, in comparative example alloy composite materials No. 21 to No. 27 in which the alloy composition is out of the range of the present invention, the corrosion is remarkably advanced, and the through holes are generated. As is clear from the above, the aluminum alloy composite according to the present invention can obtain excellent corrosion resistance even in an alkaline corrosive environment.
【００１３】[0013]
【発明の効果】本発明の熱交換器用アルミニウム合金複
合材は、ろう付け性に優れるとともにアルカリ性環境下
での耐食性に優れる。したがって熱交換器のクーラント
が高アルカリ性、高流速での場合もコロージョン、エロ
ージョン・コロージョンを起こしにくく、長期間の接合
部の維持による強度の保持と、耐食性の大幅な向上を図
ることができる。本発明のアルミニウム合金ろう材は、
上記のような長期間にわたる強度の保持と耐食性の向上
に作用する。したがって本発明は、工業上顕著な効果を
奏するものである。The aluminum alloy composite material for heat exchangers of the present invention is excellent in brazing properties and corrosion resistance in an alkaline environment. Therefore, even when the coolant of the heat exchanger has a high alkalinity and a high flow rate, corrosion, erosion and corrosion hardly occur, and it is possible to maintain the strength by maintaining the joint for a long period of time and to significantly improve the corrosion resistance. The aluminum alloy brazing material of the present invention,
It acts on maintaining the strength for a long time as described above and improving the corrosion resistance. Therefore, the present invention has an industrially remarkable effect.
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ２８Ｆ 21/08 Ｆ２８Ｆ 21/08 Ｄ Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (reference) F28F 21/08 F28F 21/08 D
Claims (3)
ｗｔ％を越え、１５ｗｔ％以下、Ｎｉ０．２〜２ｗｔ％
を含有し、残部がＡｌ及び不可避不純物からなるアルミ
ニウム合金をろう材としてクラッドし、該芯材の他の片
面にＡｌ−Ｚｎ系合金犠牲材をクラッドしたことを特徴
とする熱交換器用アルミニウム合金複合材。1. An aluminum alloy core material having one side of Si
Exceeds wt%, 15 wt% or less, Ni 0.2 to 2 wt%
An aluminum alloy composite for a heat exchanger, comprising an aluminum alloy consisting of Al and inevitable impurities clad as a brazing material, and a sacrificial material of an Al-Zn alloy clad on another surface of the core material. Wood.
下、Ｎｉ０．２〜２ｗｔ％を含有し、残部がＡｌ及び不
可避不純物からなることを特徴とするろう材アルミニウ
ム合金。2. A brazing filler metal aluminum alloy comprising more than 5% by weight of Si, not more than 15% by weight and 0.2 to 2% by weight of Ni, with the balance being Al and unavoidable impurities.
０．８ｗｔ％、Ｍｎ０．０５〜２．０ｗｔ％を含有し、
Ｓｉ０．０５〜１．２ｗｔ％、Ｃｕ０．００３〜１．２
ｗｔ％、Ｍｇ０．０３〜０．５ｗｔ％、Ｎｉ０．０５〜
２．０ｗｔ％、Ｃｒ０．０３〜０．３ｗｔ％、Ｚｒ０．
０３〜０．３ｗｔ％、Ｔｉ０．０３〜０．３ｗｔ％の内
１種または２種以上を含有し、残部Ａｌと不可避不純物
からなるアルミニウム合金である請求項１記載の熱交換
器用アルミニウム合金複合材。3. The method according to claim 1, wherein the aluminum alloy core material is Fe0.05 or more.
0.8wt%, Mn0.05 ~ 2.0wt%,
Si 0.05 to 1.2 wt%, Cu 0.003 to 1.2
wt%, Mg 0.03-0.5wt%, Ni0.05-
2.0 wt%, Cr 0.03-0.3 wt%, Zr0.
2. The aluminum alloy composite material for a heat exchanger according to claim 1, wherein the aluminum alloy contains one or more of 0.3 to 0.3 wt% of Ti and 0.03 to 0.3 wt% of Ti and the balance is Al and inevitable impurities. .
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| JP2000276499A JP4596618B2 (en) | 2000-09-12 | 2000-09-12 | High corrosion resistance aluminum alloy composite for heat exchanger and anticorrosion aluminum alloy for heat exchanger |
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| JP4596618B2 JP4596618B2 (en) | 2010-12-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010168632A (en) * | 2009-01-23 | 2010-08-05 | Kobe Steel Ltd | Aluminum alloy laminated plate excellent in fatigue characteristic |
| CN104762514A (en) * | 2015-03-23 | 2015-07-08 | 蚌埠市鸿安精密机械有限公司 | Fly ash aluminium-based composite material with high cold resistance performance and stability and preparation method thereof |
| CN104870113A (en) * | 2012-10-30 | 2015-08-26 | 海德鲁铝业钢材有限公司 | Aluminum composite material and forming method |
| CN107747007A (en) * | 2017-10-27 | 2018-03-02 | 黄林海 | A kind of high-strength corrosion-resisting Al alloy composite |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534319B (en) * | 2012-01-05 | 2014-09-10 | 乳源东阳光精箔有限公司 | Aluminium alloy composite material for laminated heat exchanger of automobile air conditioner and preparation method of aluminium alloy composite material |
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| JPS57143463A (en) * | 1981-02-27 | 1982-09-04 | Showa Alum Corp | Coating material having sacrificial anode effect for brazing sheet for vacuum brazing |
| JPH0250935A (en) * | 1988-08-12 | 1990-02-20 | Furukawa Alum Co Ltd | Brazing sheet made of aluminum for heat exchanger member |
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| JPS57143463A (en) * | 1981-02-27 | 1982-09-04 | Showa Alum Corp | Coating material having sacrificial anode effect for brazing sheet for vacuum brazing |
| JPH0250935A (en) * | 1988-08-12 | 1990-02-20 | Furukawa Alum Co Ltd | Brazing sheet made of aluminum for heat exchanger member |
| JPH10251824A (en) * | 1997-03-17 | 1998-09-22 | Furukawa Electric Co Ltd:The | Al alloy powder brazing filler metal for thermal spraying, thermal spraying method therefor and brazing filler metal-coated extruded porous flat tube obtainable by this |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010168632A (en) * | 2009-01-23 | 2010-08-05 | Kobe Steel Ltd | Aluminum alloy laminated plate excellent in fatigue characteristic |
| CN104870113A (en) * | 2012-10-30 | 2015-08-26 | 海德鲁铝业钢材有限公司 | Aluminum composite material and forming method |
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| US10279385B2 (en) | 2012-10-30 | 2019-05-07 | Hydro Aluminium Rolled Products Gmbh | Aluminum composite material and forming method |
| CN104762514A (en) * | 2015-03-23 | 2015-07-08 | 蚌埠市鸿安精密机械有限公司 | Fly ash aluminium-based composite material with high cold resistance performance and stability and preparation method thereof |
| CN107747007A (en) * | 2017-10-27 | 2018-03-02 | 黄林海 | A kind of high-strength corrosion-resisting Al alloy composite |
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