JP2685926B2 - A Blazing sheet for refrigerant passage of heat exchanger manufactured by A - Google Patents
A Blazing sheet for refrigerant passage of heat exchanger manufactured by AInfo
- Publication number
- JP2685926B2 JP2685926B2 JP26115289A JP26115289A JP2685926B2 JP 2685926 B2 JP2685926 B2 JP 2685926B2 JP 26115289 A JP26115289 A JP 26115289A JP 26115289 A JP26115289 A JP 26115289A JP 2685926 B2 JP2685926 B2 JP 2685926B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- sacrificial material
- brazing
- clad
- heat exchanger
- 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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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はAl製熱交換器の冷媒通路用ブレージングシー
トに関するもので、芯材にこれより電位の卑な犠牲陽極
材を内側（冷媒側）に犠牲材としてクラッドし、冷媒通
路内側の孔食発生を防止するものである。The present invention relates to a brazing sheet for a refrigerant passage of a heat exchanger made of Al, in which a sacrificial anode material having a lower potential than the core material is provided on the inner side (refrigerant side). It is clad as a sacrificial material to prevent the occurrence of pitting corrosion inside the refrigerant passage.
従来Al製熱交換器、例えばラジエーター，ヒーターコ
ア等はフッ化物系の非腐食性フラックスを使用したフラ
ックスろう付けで製造されている。ラジエーターは第１
図（イ）（ロ）に示すように、冷媒を通すチューブ
（１）間にフィン（２）を配置し、チューブ（１）の両
端にヘッダープレート（３）を取付けてコア（４）を組
立て、ろう付け後にヘッダープレート（３）にパッキン
グ（６）を介して樹脂タンク（５）（５′）を取付けた
もので、フィンにはJIS3003合金にZnを1.5wt％（以下wt
％を％と略記）程度添加した厚さ0.1mm前後の板を用
い、チューブにはJIS3003合金からなる芯材の外側（大
気側）にJIS4343合金ろう材をクラッドし、内側（冷媒
側）にJIS7072合金を犠牲材としてクラッドした厚さ0.3
〜0.4mmのブレージングシート（内外層クラッド率は５
〜10％）を用い、ヘッダープレートにはチューブと同様
のブレージングシート（板厚1.0〜1.8mm）を用いてい
る。Conventionally, Al heat exchangers such as radiators and heater cores have been manufactured by flux brazing using a fluoride-based non-corrosive flux. Radiator is first
As shown in Figures (a) and (b), fins (2) are arranged between tubes (1) through which the refrigerant passes, and header plates (3) are attached to both ends of the tubes (1) to assemble the core (4). After brazing, the resin tanks (5) and (5 ') are attached to the header plate (3) through the packing (6), and the fins are JIS3003 alloy with Zn of 1.5 wt% (hereinafter wt%).
%) Is used for the tube, and a JIS4343 brazing filler metal is clad on the outside (atmosphere side) of the core material made of JIS3003 alloy, and JIS7072 is used on the inside (refrigerant side). Thickness 0.3 clad with alloy as sacrificial material
~ 0.4mm brazing sheet (cladding ratio of inner and outer layers is 5
~ 10%) and the same brazing sheet (plate thickness 1.0 to 1.8 mm) as the tube is used for the header plate.
このようなラジエーターにおいて、冷媒側の孔食発生
を防止するため次の様な対策がとられている。即ちチュ
ーブの板厚が0.3〜0.4mmと薄く、JIS3003合金だけではA
l合金特有の孔食が発生し、早期に液洩れを起す場合が
あるため、第２図（イ）に示すようにJIS3003合金から
なる芯材の内側に、これより電位の卑なJIS7072合金（A
l−Zn系合金）を犠牲材としてクラッドしている。In such a radiator, the following measures are taken to prevent the occurrence of pitting corrosion on the refrigerant side. In other words, the tube thickness is as thin as 0.3 to 0.4 mm, and JIS 3003 alloy alone
l Since pitting corrosion peculiar to alloys may occur and liquid leakage may occur early, as shown in Fig. 2 (a), inside the core material made of JIS3003 alloy, JIS7072 alloy (potentially lower than this) A
The clad is a sacrificial material (1-Zn alloy).
JIS7072合金からなる犠牲材とJIS3003合金からなる芯
材は、上記ろう付け加熱時に、600℃程度の雰囲気にさ
らされ、これによってJIS7072合金中のZnは第２図
（ロ）に示すようにJIS3003合金側へ拡散し、表面Zn濃
度0.4〜0.8％，内側表面からの拡散深さ80〜150μｍのZ
n拡散パターンを示す。このZn拡散層の優先腐食によ
り、冷媒側から発生する孔食は深く成長せず、浅く広い
腐食形態をとり、長期の耐孔食性を示すようになる。The sacrificial material made of JIS7072 alloy and the core material made of JIS3003 alloy are exposed to an atmosphere of about 600 ° C during the brazing heating, whereby the Zn in the JIS7072 alloy is JIS3003 alloy as shown in Fig. 2 (b). Side surface, Zn concentration on the surface is 0.4 to 0.8%, and diffusion depth from the inner surface is 80 to 150 μm.
n shows the diffusion pattern. Due to this preferential corrosion of the Zn diffusion layer, the pitting corrosion generated from the refrigerant side does not grow deeply but takes a shallow and wide form of corrosion and exhibits long-term pitting corrosion resistance.
Al−Zn合金自体広く浅い腐食形態（面食）をとる特徴
があり、更に芯材とAl−Zn合金犠牲材との電位差によ
り、芯材が曝露した後も犠牲材層が優先的に腐食され、
芯材の腐食を防止する。また芯材中に拡散したZnにより
芯材表面も面食を起し、孔食発生を抑制する。このよう
な犠牲材としては、Al−Zn,Al−Zn−Mg,Al−Mn−Zn,Al
−Mn−Zn−Mg合金等が使用されている。Al-Zn alloy itself has a characteristic that it takes a shallow and shallow corrosion form (face corrosion), and due to the potential difference between the core material and the Al-Zn alloy sacrificial material, the sacrificial material layer is preferentially corroded even after the core material is exposed,
Prevents corrosion of core material. Further, Zn diffused into the core material also causes pitting corrosion on the surface of the core material and suppresses the occurrence of pitting corrosion. As such a sacrificial material, Al-Zn, Al-Zn-Mg, Al-Mn-Zn, Al
-Mn-Zn-Mg alloy is used.
上記ラジエーターのチューブ材のZn拡散パターンは、
ろう付け条件の変動により犠牲材表面のZn濃度が低下
し、拡散深さが深くなる場合があり、そのため、芯材と
の電位差が十分に確保できず、孔食性が著しく低下す
る。The Zn diffusion pattern of the radiator tube material is
The Zn concentration on the surface of the sacrificial material may decrease and the diffusion depth may become deep due to changes in the brazing conditions. Therefore, a sufficient potential difference from the core material cannot be ensured, and pitting corrosion remarkably decreases.
またチューブ材の板厚が更に薄くなると、従来と同様
のろう付け加熱を行なった場合、上記のように過度の加
熱によりZn拡散が進むだけでなく、チューブ材板厚に占
めるZn拡散層の比率が大となり、腐食による板厚の減少
が耐食性ばかりでなく、構造強度に大きな影響を及ぼす
ことになる。Further, when the plate thickness of the tube material becomes thinner, when the same brazing heating as in the conventional case is performed, not only Zn diffusion progresses due to excessive heating as described above, but also the ratio of the Zn diffusion layer to the tube material plate thickness. And the reduction of the plate thickness due to corrosion has a great effect on not only the corrosion resistance but also the structural strength.
本発明はこれに鑑み種々検討の結果、チューブ材の犠
牲材として使用されるAl−Zn系合金から芯材へのZn拡散
を抑制し、ろう付け加熱条件の変動や板厚の減少によっ
ても優れた耐孔食性を示すAl製熱交換器の冷媒通路用ブ
レージングシートを開発したものである。The present invention, as a result of various studies in view of this, suppresses Zn diffusion from the Al-Zn alloy used as a sacrificial material for the tube material to the core material, and is also excellent due to variation in brazing heating conditions and reduction in plate thickness. This is a brazing sheet for Al heat exchanger refrigerant passage showing pitting corrosion resistance.
即ち本発明の一つは、Al合金からなる芯材の外側（大
気側）にAl合金ろう材をクラッドし、内側（冷媒側）に
Al合金犠牲材をクラッドしたブレージングシートにおい
て、犠牲材にZn0.5〜5.0％,Zr0.03〜0.3％,Fe0.4％以
下,Si0.6％以下を含み、残部Alと不可避的不純物からな
る合金を用い、芯材に犠牲材より電位の貴なAl合金を用
いたことを特徴とするもので、犠牲材のろう付け後の再
結晶粒径を100μｍ以上とするとよい。That is, one of the present invention is to clad an Al alloy brazing material on the outside (atmosphere side) of the core material made of Al alloy and to the inside (refrigerant side)
In a brazing sheet clad with an Al alloy sacrificial material, the sacrificial material contains Zn 0.5 to 5.0%, Zr 0.03 to 0.3%, Fe 0.4% or less, Si 0.6% or less, and the balance Al and unavoidable impurities An alloy is used, and an Al alloy having a higher potential than the sacrificial material is used as the core material. The recrystallized grain size of the sacrificial material after brazing may be 100 μm or more.
また本発明の他の一つは、Al合金からなる芯材の外側
（大気側）にAl合金ろう材をクラッドし、内側（冷媒
側）にAl合金犠牲材をクラッドしたブレージングシート
において、犠牲材にZn0.5〜5.0％,Zr0.03〜0.3％,Fe0.4
％以下,Si0.6％以下を含み、更にMn0.05〜1.5％,Cr0.03
〜0.3％,Ti0.03〜0.3％,V0.03〜0.3％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
なる合金を用い、芯材に犠牲材より電位の貴なAl合金を
用いたことを特徴とするもので、犠牲材のろう付け後の
再結晶粒径を100μｍ以上とするとよい。Another aspect of the present invention is a brazing sheet in which an Al alloy brazing material is clad on the outer side (atmosphere side) of a core material made of an Al alloy and an Al alloy sacrificial material is clad on the inner side (refrigerant side). Zn0.5-5.0%, Zr0.03-0.3%, Fe0.4
% Or less, Si 0.6% or less, Mn0.05 to 1.5%, Cr0.03
~ 0.3%, Ti0.03 ~ 0.3%, V0.03 ~ 0.3% in the range of any one or more, using the balance Al and unavoidable impurities alloy, the core material from the sacrificial material This is characterized by using an Al alloy having a noble potential, and the recrystallized grain size of the sacrificial material after brazing may be 100 μm or more.
本発明においてZnを含む犠牲材の成分を上記のように
限定したのは次の理由によるものである。The reason for limiting the components of the sacrificial material containing Zn in the present invention as described above is as follows.
即ち本発明はろう付け加熱時の芯材側へのZn拡散を抑
制し、耐孔食性を著しく向上させると共に、犠牲材のろ
う付け加熱時の再結晶粒径を粗大とすることにより、Zn
拡散抑制効果を増大せしめたものである。That is, the present invention suppresses Zn diffusion to the core material side during brazing heating, significantly improves pitting corrosion resistance, and coarsens the recrystallized grain size during brazing heating of the sacrificial material, Zn
This is an increase in the diffusion suppressing effect.
しかして犠牲材のZn含有量を0.5〜5.0％と限定したの
は、犠牲材の電位を卑とし、犠牲陽極としての作用を与
えるためで、0.5％未満では効果がなく、5.0％を超える
と効果が飽和するばかりか犠牲材の融点を低下するため
である。またZr含有量を0.03〜0.3％と限定したのは、
再結晶粒径を粗大として芯材側へのZn拡散を抑制すると
共に、強度を向上させるためで、0.03％未満では効果が
なく、0.3％を越えると加工性を低下するためである。
またFe含有量を0.4％以下と限定したのは、再結晶粒径
を粗大とし、芯材側へのZn拡散を抑制するためで、0.4
％を越えると再結晶粒径が微細となって、Zn拡散抑制作
用が低下するためである。またSi含有量を0.6％以下と
限定したのは、Siを添加すると再結晶粒径を粗大化し、
Zn拡散を抑制すると共に犠牲材の強度を向上するも、0.
6％を越えると犠牲材の融点を低下するためである。However, the reason for limiting the Zn content of the sacrificial material to 0.5 to 5.0% is that the electric potential of the sacrificial material is base and acts as a sacrificial anode. If it is less than 0.5%, there is no effect, and if it exceeds 5.0%. This is because the effect is saturated and the melting point of the sacrificial material is lowered. Also, the Zr content is limited to 0.03-0.3%,
This is because the recrystallized grain size is coarse and Zn diffusion to the core side is suppressed and the strength is improved. If it is less than 0.03%, there is no effect, and if it exceeds 0.3%, the workability is deteriorated.
The Fe content is limited to 0.4% or less in order to make the recrystallized grain size coarse and suppress Zn diffusion to the core material side.
This is because if the content exceeds 100%, the recrystallized grain size becomes finer and the Zn diffusion suppressing effect decreases. The Si content is limited to 0.6% or less because the recrystallized grain size becomes coarse when Si is added,
It suppresses Zn diffusion and improves the strength of the sacrificial material.
This is because if it exceeds 6%, the melting point of the sacrificial material is lowered.
次に犠牲材にMn,Cr,Ti,VをMn0.05〜1.5％,Cr0.03〜0.
3％,Ti0.03〜0.3％,V0.03〜0.3％の範囲内で何れか１種
又は２種以上を添加するのは、何れも再結晶粒を粗大と
し、Znの拡散作用を抑制すると共に、犠牲材の強度を向
上するためで、下限未満では効果がなく、上限を越える
と加工性を低下するためである。Next, Mn, Cr, Ti, and V were added to the sacrificial material as Mn 0.05 to 1.5% and Cr 0.03 to 0.
Addition of any one kind or two kinds or more within the range of 3%, Ti0.03 to 0.3%, and V0.03 to 0.3% makes the recrystallized grains coarse and suppresses the diffusion effect of Zn. At the same time, it is because the strength of the sacrificial material is improved. If it is less than the lower limit, there is no effect, and if it exceeds the upper limit, the workability is deteriorated.
上記組成の合金を犠牲材として常法によりブレージン
グシートを製造すると、ろう付け加熱後50〜200μｍ程
度の再結晶粒径となるが、製造工程において均質化処理
温度及び中間焼鈍後の最終冷間圧延率をコントロールす
ることにより、ろう付け加熱後の再結晶粒径を100μｍ
以上とすると、Zn拡散抑制効果を一層向上することがで
きる。When a brazing sheet is manufactured by an ordinary method using the alloy having the above composition as a sacrificial material, the recrystallized grain size is about 50 to 200 μm after brazing and heating, but in the manufacturing process, the homogenization treatment temperature and the final cold rolling after intermediate annealing are performed. By controlling the rate, the recrystallized grain size after brazing and heating is 100 μm
With the above, the effect of suppressing Zn diffusion can be further improved.
芯材としては、上記犠牲材より電位の貴なAl合金を用
いれば問題なく、例えばAl−Mn系のJIS3003合金,Al−Mn
−Mg系のJIS3004合金,Al−Mg−Si系のJIS6951合金又は
これ等合金にCuを添加した合金が使用される。芯材の外
側（大気側）にはAl−Si系のAl合金ろう材をクラッドし
て三層構造とする。犠牲材と外側ろう材のクラッド率は
５〜15％で、板厚が薄い場合には高目に、逆の場合には
低目に設定し、その厚さは10μｍ以上とすることが望ま
しい。As the core material, there is no problem if an Al alloy having a higher potential than the sacrificial material is used, for example, Al-Mn-based JIS3003 alloy, Al-Mn
-Mg-based JIS3004 alloy, Al-Mg-Si-based JIS6951 alloy, or alloys obtained by adding Cu to these alloys are used. The outer side (atmosphere side) of the core material is clad with an Al-Si based Al alloy brazing material to form a three-layer structure. The clad ratio of the sacrificial material and the outer brazing material is 5 to 15%, and is set to be high when the plate thickness is thin and low when the plate thickness is opposite, and the thickness is preferably 10 μm or more.
以下本発明を実施例について説明する。 Hereinafter, the present invention will be described with reference to examples.
実施例１ 第１表に示す組成の合金を犠牲材として使用し、常法
により溶解鋳造後550℃で均熱化処理した。これを500℃
で熱間圧延した後、冷間圧延により厚さ2.5mmの板とし
た。Example 1 An alloy having the composition shown in Table 1 was used as a sacrificial material, and a soaking treatment was performed at 550 ° C. after melt casting by a conventional method. This is 500 ℃
After being hot-rolled in, a plate having a thickness of 2.5 mm was obtained by cold rolling.
一方芯材に厚さ45mmのJIS3003合金鋳塊を用い、その
一方の表面に厚さ2.5mmのJIS4343合金からなるAl合金ろ
う材を、他方の表面に上記犠牲材をクラッドし、熱間圧
延，中間焼鈍，冷間圧延をへて厚さ0.4mm,ろう材のクラ
ッド率５％，犠牲材のクラッド率５％のブレージングシ
ートを作製した。On the other hand, a 45 mm thick JIS3003 alloy ingot is used for the core material, an Al alloy brazing material made of a 2.5 mm thick JIS4343 alloy on one surface of the core material, the other surface of the sacrificial material is clad, and hot rolled, A brazing sheet having a thickness of 0.4 mm, a brazing material clad ratio of 5% and a sacrificial material clad ratio of 5% was produced by intermediate annealing and cold rolling.
これを600℃で10分間ろう付け加熱し、犠牲材表面の
最大Zn濃度及び犠牲材表面からのZn拡散深さを断面EPMA
線分析により求め、更に犠牲材の加熱後の再結晶粒径を
測定した。またCu2+イオンを10ppm添加した水道水中に
３ケ月間浸漬し、80℃×８時間と室温×16時間のサイク
ル腐食試験を行ない、犠牲材表面に発生したピット深さ
を光学顕微鏡による焦点深度法により測定した。その結
果を第１表に示す。This is brazed and heated at 600 ° C for 10 minutes, and the maximum Zn concentration on the surface of the sacrificial material and the Zn diffusion depth from the surface of the sacrificial material are measured by cross-section EPMA.
It was determined by line analysis, and the recrystallized grain size of the sacrificial material after heating was measured. Also, it was immersed in tap water containing 10 ppm of Cu 2+ ions for 3 months, and subjected to a cycle corrosion test at 80 ° C for 8 hours and room temperature for 16 hours. It was measured by the method. Table 1 shows the results.
第１表から明らかなように、本発明例は何れも犠牲材
の表面Zn濃度が高く、しかもZn拡散深さが浅く、優れた
耐孔食性を示す。これに対し犠牲材の組成が外れる比較
例では表面Zn濃度が低いか又はZn拡散深さが深く、耐孔
食性が劣ることが判る。 As is clear from Table 1, all the examples of the present invention have a high Zn concentration on the surface of the sacrificial material and a shallow Zn diffusion depth, and exhibit excellent pitting corrosion resistance. On the other hand, in the comparative example in which the composition of the sacrificial material deviates, the surface Zn concentration is low or the Zn diffusion depth is deep, resulting in poor pitting corrosion resistance.
実施例２ 実施例１における本発明例No.4,10を使用し、犠牲材
の均質化処理条件とクラッド材の中間焼鈍後の冷間圧延
率を変化させて、ろう付け加熱後の犠牲材の再結晶粒径
を変化させた。Example 2 Using Example Nos. 4 and 10 of the present invention in Example 1, the sacrificial material after brazing and heating was changed by changing the conditions for homogenizing the sacrificial material and the cold rolling rate after intermediate annealing of the clad material. The recrystallized grain size was changed.
これについて実施例１と同様のろう付け加熱を行なっ
て、Zn拡散状況と腐食試験によるピット深さ及び犠牲材
の再結晶粒径を実施例１と同様にして測定した。その結
果を第２表に示す。The same brazing heating as in Example 1 was performed on this, and the Zn diffusion state, the pit depth by the corrosion test, and the recrystallized grain size of the sacrificial material were measured in the same manner as in Example 1. Table 2 shows the results.
第２表から明らかなように、犠牲材のろう付け加熱後
の再結晶粒径を100μｍ以上とした本発明例は何れも芯
材側へのZn拡散が抑制され、優れた耐孔食性を示すこと
が判る。 As is clear from Table 2, all of the examples of the present invention in which the recrystallized grain size of the sacrificial material after brazing and heating was 100 μm or more, suppressed Zn diffusion to the core material side and exhibited excellent pitting corrosion resistance. I understand.
尚実施例で使用したJIS3003合金からなる芯材のろう
付け加熱後の再結晶粒径は50〜150μｍであり、また芯
材と犠牲材の電位は、５％NaCl液で飽和カロメル電極を
基準として、芯材は−720mV,犠牲材は−730〜−900mVで
あった。The recrystallized grain size of the core material made of JIS 3003 alloy used in the examples after brazing and heating was 50 to 150 μm, and the potentials of the core material and the sacrificial material were 5% NaCl solution and a saturated calomel electrode as a reference. , The core material was -720 mV, and the sacrificial material was -730 to -900 mV.
このように本発明によれば、犠牲材から芯材へのZn拡
散を著しく抑制することが可能となり、過酷なろう付け
条件での表面Zn濃度低下による耐孔食性の低下を防止
し、ブレージングシートを薄肉化したときにもZn拡散を
抑制することができるため、高Zn材を犠牲材に使用し、
犠牲材を薄くクラッドすることで、Zn拡散層の厚さの全
板厚に占める割合を小さくすることができ、長期の耐孔
食性を得ることが可能になる等工業上顕著な効果を奏す
るものである。As described above, according to the present invention, it is possible to remarkably suppress Zn diffusion from the sacrificial material to the core material, prevent deterioration of pitting corrosion resistance due to decrease of surface Zn concentration under severe brazing conditions, and brazing sheet. Since Zn diffusion can be suppressed even when the thickness is reduced, high Zn material is used as a sacrificial material,
By thinly clad the sacrificial material, it is possible to reduce the ratio of the thickness of the Zn diffusion layer to the total plate thickness, and it is possible to obtain long-term pitting corrosion resistance. Is.
第１図（イ）（ロ）はラジエーターの一例を示すもの
で、（イ）は正面図、（ロ）は（イ）におけるＡ−Ａ線
の拡大断面図、第２図（イ）（ロ）はチューブ材のろう
付け加熱前後のZn拡散状況の一例を示すもので、（イ）
はろう付け加熱前の犠牲材表面のZn濃度、（ロ）はろう
付け加熱後の犠牲材表面からのZn拡散深さを示す説明図
である。 １……チューブ、２……フィン ３……ヘッダープレート、４……コア 5,5′……樹脂タンク、６……パッキング1 (a) and (b) show an example of a radiator, (a) is a front view, (b) is an enlarged sectional view taken along the line AA in (a), and FIG. 2 (a) (b). ) Shows an example of the Zn diffusion state before and after brazing heating of the tube material.
FIG. 3 is an explanatory diagram showing a Zn concentration on the surface of the sacrificial material before heating for brazing, and (b) a Zn diffusion depth from the surface of the sacrificial material after heating for brazing. 1 ... Tube, 2 ... Fin 3 ... Header plate, 4 ... Core 5, 5 '... Resin tank, 6 ... Packing
Claims (4)
合金ろう材をクラッドし、内側（冷媒側）にAl合金犠牲
材をクラッドしたブレージングシートにおいて、犠牲材
にZn0.5〜5.0wt％,Zr0.03〜0.3wt％,Fe0.4wt％以下,Si
0.6wt％以下を含み、残部Alと不可避的不純物からなる
合金を用い、芯材に犠牲材より電位の貴なAl合金を用い
たことを特徴とするAl製熱交換器の冷媒通路用ブレージ
ングシート。1. Al on the outside (atmosphere side) of a core material made of Al alloy
A brazing sheet in which an alloy brazing material is clad and an Al alloy sacrificial material is clad on the inside (refrigerant side), the sacrificial material is Zn 0.5 to 5.0 wt%, Zr 0.03 to 0.3 wt%, Fe 0.4 wt% or less, Si
A brazing sheet for a refrigerant passage of an Al heat exchanger characterized by using an alloy containing 0.6 wt% or less and the balance Al and unavoidable impurities, and using an Al alloy having a higher potential than a sacrificial material as a core material. .
ｍ以上とする請求項１記載のAl製熱交換器の冷媒通路用
ブレージングシート。2. The recrystallized grain size of the sacrificial material after brazing is 100 μm.
The brazing sheet for a refrigerant passage of the Al heat exchanger according to claim 1, wherein the brazing sheet has a length of at least m.
合金ろう材をクラッドし、内側（冷媒側）にAl合金犠牲
材をクラッドしたブレージングシートにおいて、犠牲材
にZn0.5〜5.0wt％,Zr0.03〜0.3wt％,Fe0.4wt％以下,Si
0.6wt％以下を含み、更にMn0.05〜1.5wt％,Cr0.03〜0.3
wt％,Ti0.03〜0.3wt％,V0.03〜0.3wt％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
らなる合金を用い、芯材に犠牲材より電位の貴なAl合金
を用いたことを特徴とするAl製熱交換器の冷媒通路用ブ
レージングシート。3. Al outside the core material made of Al alloy (atmosphere side)
A brazing sheet in which an alloy brazing material is clad and an Al alloy sacrificial material is clad on the inside (refrigerant side), the sacrificial material is Zn 0.5 to 5.0 wt%, Zr 0.03 to 0.3 wt%, Fe 0.4 wt% or less, Si
0.6wt% or less, Mn0.05-1.5wt%, Cr0.03-0.3
wt%, Ti 0.03 to 0.3 wt%, V 0.03 to 0.3 wt%, and any one or more of them are used, and the balance is Al and unavoidable impurities. A brazing sheet for a refrigerant passage of a heat exchanger made of Al, which is made of an Al alloy having a higher potential.
ｍ以上とする請求項３記載のAl製熱交換器の冷媒通路用
ブレージングシート。4. The recrystallized grain size of the sacrificial material after brazing is 100 μm.
The brazing sheet for a refrigerant passage of the Al heat exchanger according to claim 3, wherein the brazing sheet has a length of at least m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26115289A JP2685926B2 (en) | 1989-10-05 | 1989-10-05 | A Blazing sheet for refrigerant passage of heat exchanger manufactured by A |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26115289A JP2685926B2 (en) | 1989-10-05 | 1989-10-05 | A Blazing sheet for refrigerant passage of heat exchanger manufactured by A |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03124393A JPH03124393A (en) | 1991-05-27 |
| JP2685926B2 true JP2685926B2 (en) | 1997-12-08 |
Family
ID=17357831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26115289A Expired - Fee Related JP2685926B2 (en) | 1989-10-05 | 1989-10-05 | A Blazing sheet for refrigerant passage of heat exchanger manufactured by A |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2685926B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2572495B2 (en) * | 1991-09-06 | 1997-01-16 | 昭和アルミニウム株式会社 | Aluminum material for brazing with excellent corrosion resistance |
| JP4807826B2 (en) * | 2005-08-04 | 2011-11-02 | 住友軽金属工業株式会社 | Aluminum alloy clad material with excellent surface bonding by brazing sacrificial anode material |
| JP4623729B2 (en) * | 2005-09-27 | 2011-02-02 | 株式会社デンソー | Aluminum alloy clad material and heat exchanger excellent in surface bonding by brazing of sacrificial anode material surface |
| JP4111456B1 (en) * | 2006-12-27 | 2008-07-02 | 株式会社神戸製鋼所 | Aluminum alloy brazing sheet for heat exchanger |
| JP6847630B2 (en) * | 2016-11-04 | 2021-03-24 | 株式会社Ｕａｃｊ押出加工 | Aluminum alloy heat transfer tube for open rack type vaporizer and its manufacturing method and open rack type vaporizer |
| JP2020144964A (en) | 2019-03-08 | 2020-09-10 | 株式会社東芝 | Magnetic disk device |
-
1989
- 1989-10-05 JP JP26115289A patent/JP2685926B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03124393A (en) | 1991-05-27 |
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