JPH0615701B2 - Aluminum alloy cladding for heat exchangers - Google Patents
Aluminum alloy cladding for heat exchangersInfo
- Publication number
- JPH0615701B2 JPH0615701B2 JP60237136A JP23713685A JPH0615701B2 JP H0615701 B2 JPH0615701 B2 JP H0615701B2 JP 60237136 A JP60237136 A JP 60237136A JP 23713685 A JP23713685 A JP 23713685A JP H0615701 B2 JPH0615701 B2 JP H0615701B2
- Authority
- JP
- Japan
- Prior art keywords
- brazing
- alloy
- core material
- core
- aluminum alloy
- 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.)
- Expired - Lifetime
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Description
【発明の詳細な説明】 産業上の利用分野 本発明はフツ化物系フラツクスを使用したろう付により
製造される熱交換器用ブレージングシートに関するもの
である。Description: TECHNICAL FIELD The present invention relates to a brazing sheet for a heat exchanger, which is manufactured by brazing using a fluoride-based flux.
従来の技術 一般にアルミ製熱交換器の製造にはフラツクスろう付け
法、真空ろう付け法、ノコロツク（アルキヤン，フラツ
クス商標以下同じ）ろう付け法が用いられているが、最
近ではノコロツクろう付け法が多用されるようになつ
た。ノコロツクろう付け法はJIS1050（純度99.5wt％以
上の純Ａｌ）(以下ｗｔ％を単に％と略記)、3003(Al−
0.05〜0.20％Cu−1.0〜1.5％Ｍｎ合金)、3203（Al−1.0
〜1.5％MN合金）等を芯材とし、JIS4343（Al−6.8〜8.2
％Ｓｉ合金）、4045（Al−9.0〜11.0％Si合金）をろう
材としてクラツドしたブレーシングシートを使用し、フ
ツ化物系の非腐食性フラツクスを用いてＮ2ガス中でろ
う付けを行なうもので、ろう付け設備費が安価でメンテ
ナンスが容易で、フラツクの後処理が不要である等の利
点を有している。即ちノコロツクろう付けにより生ずる
フラツクス残渣は吸湿性、溶解性及び腐食性がなく塩化
物系フラツクスを使用したろう付け等の後で行なわれる
ろう付け後の残渣の洗浄処理を必要としない。2. Description of the Related Art In general, aluminum heat exchangers are manufactured by using Frax brazing method, vacuum brazing method, or Nokorotsu (Alkyan, Frax trademark is the same below) brazing method, but recently Nokorotsu brazing method is widely used. It came to be done. Nokorotsu brazing method is based on JIS1050 (pure Al with a purity of 99.5 wt% or more) (hereinafter wt% is simply referred to as%), 3003 (Al-
0.05 to 0.20% Cu-1.0 to 1.5% Mn alloy), 3203 (Al-1.0
〜1.5% MN alloy) etc. as core material, JIS4343 (Al-6.8〜8.2
% Si alloy), 4045 (Al-9.0 to 11.0% Si alloy) is used as a brazing material, and brazing sheet is used for brazing in N 2 gas using non-corrosive fluoride fluoride system. Therefore, the brazing equipment cost is low, the maintenance is easy, and the post-treatment of the flap is not required. That is, the flax residue produced by Nokorotsu brazing is not hygroscopic, soluble and corrosive, and does not require a cleaning treatment of the residue after brazing performed after brazing using a chloride-based flux.
発明が解決しようとする問題点 従来のＺnＣl２を含んだフラツクスを使用するフラツク
スろう付け法は、ろう付け加熱により材料表面層に100
〜200μｍ程度のＺｎ拡散層を形成し孔食発生を防止す
る効果を有しているが、ノコロツクろう付け法では第２
図に示すサーペンタインタイプのコンデンサーやエバポ
レーター等のチユーブ(1)にジンケート処理等によりＺ
ｎを析出させ、ろう付け加熱によりＺｎを拡散させる必
要があり、第３図に示すラジエーターではＺｎを含有す
る犠牲フイン(2)と組み合せて耐食性を向上させる必要
がある。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention A conventional brazing method using a flux containing ZnCl 2 is 100% on a material surface layer by brazing heating.
It has the effect of forming a Zn diffusion layer of about 200 μm to prevent the occurrence of pitting corrosion.
Zube is applied to the tube (1) such as the serpentine type condenser and evaporator shown in the figure by zincate treatment.
It is necessary to precipitate n and to diffuse Zn by heating by brazing, and in the radiator shown in FIG. 3, it is necessary to improve corrosion resistance by combining with the sacrificial fin (2) containing Zn.
またノコロツクろう付け法による第３図に示すラジエー
ターにおいて強度を向上するためにチユーブ材にJIS300
5（Al−1.0〜1.5%Mn−0.2〜0.6%Mg合金）、3105（Al−
0.3〜0.8％Mn−0.2〜0.8％Ｍｇ合金）等を使用し、ヘツ
ダープレート(3)にJIS3005、3105、6951（Al−0.2〜0.5
%Si−0.15〜0.4％Ｃｕ−0.4〜0.8％Ｍｇ合金）等を使用
すると、芯材に添加したＭｇとフラツクス中のＦが反応
し、チユーブ(1)の表面にＭｇ含有フラツクス残渣を形
成する。その結果チユーブ表面の電位が卑となり、犠牲
フインとの電位差が５０mＶ以下となつたり、チユーブ
とフインの電位が逆転し、犠牲フインの効果が十分発揮
されない場合が起り、特にＭｇ含有量が０．３％以上で
顕著にあらわれる。In addition, in order to improve the strength of the radiator shown in Fig. 3 by the Nokorokko brazing method, JIS300 is used for the tube material.
5 (Al-1.0 to 1.5% Mn-0.2 to 0.6% Mg alloy), 3105 (Al-
0.3-0.8% Mn-0.2-0.8% Mg alloy), etc., JIS 3005, 3105, 6951 (Al-0.2-0.5) on the header plate (3)
% Si-0.15-0.4% Cu-0.4-0.8% Mg alloy) etc., Mg added to the core material and F in the flux react to form a Mg-containing flux residue on the surface of the tube (1). . As a result, the potential of the surface of the tube becomes base, the potential difference from the sacrificial fin becomes 50 mV or less, the potential of the tube and the fin are reversed, and the effect of the sacrificial fin may not be fully exerted. In particular, the Mg content of 0. Remarkably appears at 3% or more.
またノコロツクろう付けにおけるＭｇ含有フラツクス残
渣は絶縁性を有しており、フインに流れる防食電流を阻
害し、フイン犠牲効果を抑制する。特にろう付け性向上
のためにフラツクス濃度を濃くしてろう付けすると電位
の卑化のみならず、残渣も厚くなり一層防食電流が流れ
にくくなる。In addition, the Mg-containing flux residue in brazing brazing has an insulating property, which inhibits the anticorrosion current flowing in the fin and suppresses the fin sacrifice effect. In particular, when brazing is performed by increasing the flux concentration in order to improve the brazing property, not only the electric potential becomes base, but also the residue becomes thicker so that the anticorrosion current becomes more difficult to flow.
問題点を解決するための手段 本発明はこれに鑑み種々検討の結果、ノコロツクろう付
けにより組立てるアルミ製熱交換器において、強度及び
耐食性を向上することができる熱交換器用アルミニウム
合金クラツド板を開発したものである。Means for Solving the Problems The present invention has made various investigations in view of this, and has developed an aluminum alloy cladding plate for a heat exchanger capable of improving strength and corrosion resistance in an aluminum heat exchanger assembled by Nokorotsu brazing. It is a thing.
即ち本発明クラツド板の一つはＣｕ0.55〜1.0％、Ｍｎ
0.3〜1.5％、Mg0.1〜1.0％を含み、残部Ａｌと不可避的
不純物からなる合金を芯材とし、その片面又は両面にＡ
ｌ−Ｓｉ系ろう材をクラツドしたことを特徴とするもの
である。That is, one of the cladding plates of the present invention is Cu 0.55 to 1.0%, Mn
An alloy containing 0.3 to 1.5% and Mg 0.1 to 1.0% and the balance Al and unavoidable impurities is used as the core material, and A is formed on one or both sides of the core material.
It is characterized in that an l-Si based brazing material is clad.
また本発明クラツド材の他の一つは、Ｃｕ0.55〜1.0
％、Mn0.3〜1.5％、Ｍg0.1〜1.0％を含み、更にＣr0.3
％以下、Ｚｒ0.25以下、Ｔｉ0.3％以下の範囲内で何れ
か１種又は２種以上を含み、残部Ａｌと不可避的不純物
からなる合金を芯材とし、その片面又は両面にＡｌ−Ｓ
ｉ系ろう材をクラツドしたことを特徴とするものであ
る。Another one of the cladding materials of the present invention is Cu0.55 to 1.0.
%, Mn 0.3 to 1.5%, Mg 0.1 to 1.0%, and Cr 0.3
% Or less, Zr 0.25 or less, and Ti 0.3% or less in any one kind or two kinds or more, the balance is made of an alloy consisting of Al and unavoidable impurities as a core material, and Al-S on one or both surfaces thereof.
It is characterized by cladding an i-based brazing material.
作用 本発明クラツド材において芯材の合金組成を上記の如く
限定したのは次の理由によるものである。Action The reason why the alloy composition of the core material in the cladding material of the present invention is limited as described above is as follows.
Ｃｕの添加は芯材の強度を向上し、かつ電位を向上する
も、その含有量0.55％未満では効果が不十分であり、
１．０％を越えると芯材の耐食性を低下すると共に加工
性を劣化するためである。Ｍｎの添加は芯材に高温強度
を付与するもので、そ含有量が０．３％未満では高温で
十分な強度が得られず、１．５を越えると粗大なAl−Mn
化合物を形成し、加工性を劣化するためである。またＭ
gは芯材の強度を向上するために添加するもので、その
含有量が０．１％未満では十分な強度が得られず、１％
を越えるとノコロツクブレージングのろう付け時に、ろ
う付け芯材への拡散を早め、ろう付け性を低下すると共
に、フラツクス（KAlF4）中のフツ素と反応し、ろう付
け後の表面電位の卑化が著しく、耐食性が低下するため
である。Addition of Cu improves the strength of the core material and the electric potential, but if the content is less than 0.55%, the effect is insufficient.
This is because if it exceeds 1.0%, the corrosion resistance of the core material is deteriorated and the workability is deteriorated. Addition of Mn imparts high-temperature strength to the core material. If the content of Mn is less than 0.3%, sufficient strength cannot be obtained at high temperatures, and if it exceeds 1.5, coarse Al-Mn is produced.
This is because a compound is formed and workability is deteriorated. Also M
g is added to improve the strength of the core material, and if the content is less than 0.1%, sufficient strength cannot be obtained and 1%
Beyond the above, during brazing of Nokorotsu brazing, the diffusion to the brazing core material is accelerated and the brazing property is reduced, and at the same time, it reacts with the fluorine in the flux (KAlF 4 ) and the base potential of the surface potential after brazing is reduced. This is because the corrosion resistance is deteriorated and the corrosion resistance is lowered.
更にCr、Zr、Tiの何れか１種又は２種以上の添加は、ろ
う付け性を阻害することなく、高温供を一層高めるため
に添加したもので、何れも上限を越えて添加すると巨大
な化合物Ａl−Ｃr、Ａl−Ｚr、Ａl−Ｔi等を析出し、芯
材の加工性を著しく低下する。またこれ等は何れも単独
で添加するよりも、２種類以上添加する方が効果的であ
る。Furthermore, any one or more of Cr, Zr, and Ti are added in order to further improve the high temperature service without impairing the brazing property, and if any of the addition exceeds the upper limit, it will be a huge one. Compounds Al-Cr, Al-Zr, Al-Ti, etc. are deposited, and the workability of the core material is significantly reduced. Further, it is more effective to add two or more kinds of these than to add them individually.
上記芯材は通常の手段により、その片面又は両面にＡl
−Ｓi系ろう材をクラツドするとにより、特にラジエー
ターのチユーブ材に用い、ノコロツクろう付け後の強度
及び犠牲フインと組合わせたラジエーターコアの耐食性
を向上する。即ちＣｕを添加して強度を高めると共に、
Ｍｎ及びＭｇを添加した芯材の片面又は両面にＡｌ−Ｓ
ｉ系ろう材をクラツドしたものはノコロツクろう付けに
より、チユーブ材表面の電位の卑化を抑制し、犠牲フイ
ンとの電位差を十分確保し、耐食性を向上する。The above-mentioned core material is Al
Cladding the Si-based brazing filler metal improves the corrosion resistance of the radiator core in combination with the sacrificial fin and the strength after brazing, especially when used as the radiator's tube material. That is, Cu is added to increase strength and
Al-S on one or both sides of the core material added with Mn and Mg
The cladded i-based brazing material suppresses the base potential of the electric potential on the surface of the tube material by brazing, and secures a sufficient potential difference from the sacrificial fins to improve corrosion resistance.
実施例 第１表に示す組成の合金を芯材とし、その片面にクラツ
ド率１０％でJIS4045相当の合金（Ａl−１０%Ｓｉ合
金）をクラツドして、板厚０．４mm、質別Ｈ１４のブレ
ージングシートを作成した。EXAMPLE An alloy having the composition shown in Table 1 was used as a core material, and an alloy (Al-10% Si alloy) equivalent to JIS 4045 with a cladding rate of 10% was clad on one surface thereof to obtain a plate thickness of 0.4 mm and temper H14. I made a brazing sheet.
このブレーシングシートから幅３０mm、長さ２００mmの
サンプルを切り出し、ノコロツクろう付けを模してＮ２
ガス中、600℃に１０分間加熱処理した後、JIS5号試験
片に加工して強度を測定し、また幅５０mm、長さ100mm
のサンプルを切り出し、アセトン脱脂後５０％濃度のフ
ツ化アルミニウムカリ塩フラツクス水溶液を塗布し、15
0℃で乾燥後、上記と同様ノコロツクろう付けを模して
Ｎ２ガス中600℃に１０分間加熱処理したものについて
電位を測定すると共に、JIS3003＋１％Ｚnからなるフイ
ン材（厚さ０．１mm、幅５０mm、長さ100mm）について
も同様に加熱処理した後電位を測定した。尚電位は２０
℃の５％ＮａＣｌ中に１０分浸漬後、飽和カルメロ電極
（Ｓ．Ｃ．Ｅ）を基準に測定した。Width 30mm from the bracing sheet, cut a sample of length 200 mm, to simulate the Nokorotsuku brazing N 2
After heat treatment in gas at 600 ℃ for 10 minutes, process it into JIS No. 5 test piece and measure its strength. Width 50mm, length 100mm
The sample is cut out and degreased with acetone, and 50% aqueous solution of potassium fluoride aluminum fluoride is applied.
After drying at 0 ° C., the potential was measured on a product heat-treated in N 2 gas at 600 ° C. for 10 minutes in the same manner as the above-mentioned Nokorotsu brazing, and the fin material made of JIS3003 + 1% Zn (thickness 0.1 mm, The width of 50 mm and the length of 100 mm) was similarly heat-treated, and then the potential was measured. The potential is 20
After immersion in 5% NaCl at 0 ° C for 10 minutes, measurement was performed with a saturated carmelo electrode (SCE) as a reference.
次に上記ブレーシングシートを電縫加工した第１図に示
す厚さ２２mm、幅１６mmの偏平チユーブ(1)とJIS3003＋
１％Ｚｎからなる厚さ０．１mm、幅１６mmのフイン材を
コルゲート加工したフイン(2)と組合せてコアを形成
し、アセトン脱脂後５％濃度のフツ化アルミニウムカリ
塩フラツクス水溶液を塗布し、150℃で乾燥してからＮ
２ガス中で600℃に１０分間加熱してろう付けし、ラジ
エーター用コアを作成した。これについてJISZ2371に準
じた塩水噴霧試験を行ない、チユーブに貫通孔食が発生
するまでの時間を調べた。これ等の結果を第１表に併記
した。Next, the above bracing sheet was electro-sewn and the flat tube (1) having a thickness of 22 mm and a width of 16 mm shown in FIG. 1 and JIS3003 +
A fin material having a thickness of 0.1 mm and a width of 16 mm and made of 1% Zn was combined with a corrugated fin (2) to form a core, and after degreasing with acetone, an aqueous solution of potassium fluoride fluoride salt with a concentration of 5% was applied. After drying at 150 ℃, N
It heated at 600 degreeC in 2 gas for 10 minutes, and brazed, and produced the core for radiators. A salt spray test according to JIS Z2371 was conducted on this, and the time until the occurrence of through-pitting corrosion in the tube was examined. The results are also shown in Table 1.
第１表から明らかなように本発明合金NO.１〜５を芯材
とする本発明のクラツド材は何れも強度は１５Kg／mm2
以上、フイン材との電位差は５０ｍＶ以上となり、これ
を用いたラジエーター用コアの耐食性は極めて良好で、
4000時間の塩水噴霧試験でも孔食が認められなかつた。 As is clear from Table 1, all the cladding materials of the present invention having the alloys of the present invention No. 1 to 5 as core materials have a strength of 15 kg / mm 2.
As described above, the potential difference with the fin material is 50 mV or more, and the corrosion resistance of the radiator core using this is extremely good,
No pitting was observed in the 4000-hour salt spray test.
これに対し本発明における芯材より合金組成が外れる比
較合金NO.６、〜１３を用いたブレージングシートでは
良好なラジエーター用コアが作成できないことが判る。
即ちＣｕ含有量の少ない比較用合金NO.６及びＭｎ含有
量の少ない比較用合金NO.８を芯材とするブレージング
シートを用いたものは耐食性が劣り、Ｃｕ含有量の多い
比較用合金NO.７、Ｍｎ含有量の多い比較用合金NO.９及
びＣr、Ｚr、Ｔiの何れか１種以上の合計含有量の多い
比較合金NO.１２、１３では何れも加工性が悪く、ブレ
ージングシートとすることを断念した。またＭｇ含有量
の多い比較合金NO.１１を用いたブレーシングシートは
ろう付け性が悪く、ラジエーター用コアの作製を断念し
た。On the other hand, it can be seen that a good radiator core cannot be produced with the brazing sheet using Comparative Alloys Nos. 6 and 13 whose alloy composition deviates from the core material of the present invention.
In other words, the comparative alloy NO.6 having a low Cu content and the comparative alloy NO.8 having a low Mn content using the brazing sheet having the core material as a core material are inferior in corrosion resistance and have a high Cu content. 7, comparative alloy No. 9 having a high Mn content and comparative alloy Nos. 12 and 13 having a high total content of any one of Cr, Zr, and Ti have poor workability, and are used as brazing sheets. I gave up. Further, the brazing sheet using the comparative alloy No. 11 having a high Mg content had a poor brazing property, and the production of the radiator core was abandoned.
このように本発明によればノコロツクろう付け法による
アルミ製熱交換器の製造において、芯材中の含有Ｍｇと
フラツクス中のフツ素との反応による表面電位の卑化現
象を防止し、Ｍｇ添加による強度改善効果を減じること
なく耐食性を改善し、熱交換器材料として薄肉化を可能
にする等顕著な効果を奏するものである。As described above, according to the present invention, in the production of an aluminum heat exchanger by the Nokorotsu brazing method, the base potential phenomenon of the surface potential due to the reaction between the Mg contained in the core material and the fluorine in the flux is prevented, and the addition of Mg is prevented. The corrosion resistance is improved without diminishing the strength improving effect due to, and a remarkable effect such as making the heat exchanger material thinner can be achieved.
第１図は本発明クラツド材を評価するために作成したラ
ジエーター用コアの一例を示す斜視図、第２図はサーペ
ンタータイプのコンデンサ用コアの一例を示す斜視図、
第３図はラジエーター用コアの一例を示す斜視図であ
る。 １チユーブ ２フイン ３ヘツダープレート1 is a perspective view showing an example of a radiator core made to evaluate the cladding material of the present invention, and FIG. 2 is a perspective view showing an example of a serpenter type capacitor core.
FIG. 3 is a perspective view showing an example of a radiator core. 1 tube 2 fins 3 header plates
Claims (2)
Ｍｇ0.1〜1.0wt％を含み、残部Ａｌと不可避的不純物か
らなる合金を芯材とし、その片面又は両面にＡｌ−Ｓｉ
系ろう材をクラッドしたことを特徴とする熱交換器用ア
ルミニウム合金クラッド材。1. Cu 0.55-1.0 wt%, Mn 0.3-1.5 wt%,
An alloy containing Mg 0.1 to 1.0 wt% and the balance Al and unavoidable impurities is used as a core material, and Al-Si is formed on one or both surfaces of the core material.
An aluminum alloy clad material for a heat exchanger, characterized by clad with a brazing filler metal.
Ｍｇ0.1〜1.0wt％を含み、更にＣｒ0.3wt％以下、Ｚｒ
0.25wt％以下、Ｔｉ0.3wt％以下の範囲内で何れか１種
又は２種以上を含み、残部Ａｌと不可避的不純物からな
る合金を芯材とし、その片面又は両面にＡｌ−Ｓｉ系ろ
う材をクラッドしたことを特徴とする熱交換器用アルミ
ニウム合金クラッド材。2. Cu 0.55 to 1.0 wt%, Mn 0.3 to 1.5 wt%,
Contains Mg 0.1-1.0wt%, Cr 0.3wt% or less, Zr
An alloy containing any one or more of 0.25 wt% or less and Ti 0.3 wt% or less with the balance Al and unavoidable impurities as a core material, and an Al-Si brazing material on one or both surfaces thereof. An aluminum alloy clad material for a heat exchanger, characterized by being clad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60237136A JPH0615701B2 (en) | 1985-10-23 | 1985-10-23 | Aluminum alloy cladding for heat exchangers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60237136A JPH0615701B2 (en) | 1985-10-23 | 1985-10-23 | Aluminum alloy cladding for heat exchangers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6296637A JPS6296637A (en) | 1987-05-06 |
| JPH0615701B2 true JPH0615701B2 (en) | 1994-03-02 |
Family
ID=17010935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60237136A Expired - Lifetime JPH0615701B2 (en) | 1985-10-23 | 1985-10-23 | Aluminum alloy cladding for heat exchangers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0615701B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0765876B2 (en) * | 1986-12-22 | 1995-07-19 | 三菱アルミニウム株式会社 | Aluminum alloy core for heat exchanger |
| JPH01100237A (en) * | 1987-10-13 | 1989-04-18 | Sumitomo Light Metal Ind Ltd | Aluminum alloy material for heat exchanger having excellent corrosion resistance |
| JPH01255638A (en) * | 1988-04-05 | 1989-10-12 | Kobe Steel Ltd | Aluminum alloy brazing sheet |
| JPH0755373B2 (en) * | 1990-09-18 | 1995-06-14 | 住友軽金属工業株式会社 | Aluminum alloy clad material and heat exchanger |
| US5857266A (en) * | 1995-11-30 | 1999-01-12 | Alliedsignal Inc. | Heat exchanger having aluminum alloy parts exhibiting high strength at elevated temperatures |
| KR20020010972A (en) * | 2000-07-31 | 2002-02-07 | 신영주 | Aluminum brazing sheet |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS575840A (en) * | 1980-06-12 | 1982-01-12 | Mitsubishi Alum Co Ltd | Aluminum alloy brazing sheet having excellent pitting- corrosion resistance and high strength |
| JPS6179752A (en) * | 1984-09-27 | 1986-04-23 | Mitsubishi Alum Co Ltd | Manufacture of vacuum brazing sheet for drawn cup material in drawn cup type heat exchanger |
-
1985
- 1985-10-23 JP JP60237136A patent/JPH0615701B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6296637A (en) | 1987-05-06 |
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| R250 | Receipt of annual fees |
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| EXPY | Cancellation because of completion of term |