JPH05154693A - Manufacture of aluminum alloy brazing sheet for vacuum brazing - Google Patents
Manufacture of aluminum alloy brazing sheet for vacuum brazingInfo
- Publication number
- JPH05154693A JPH05154693A JP35092691A JP35092691A JPH05154693A JP H05154693 A JPH05154693 A JP H05154693A JP 35092691 A JP35092691 A JP 35092691A JP 35092691 A JP35092691 A JP 35092691A JP H05154693 A JPH05154693 A JP H05154693A
- Authority
- JP
- Japan
- Prior art keywords
- brazing
- alloy
- vacuum
- aluminum alloy
- skin 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.)
- Granted
Links
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- ing And Chemical Polishing (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ドロンカップタイプの
オイルクーラー、エバポレーター、インタークーラー及
びラジエーターのようなアルミニウム製熱交換器の真空
ブレージングに適した真空ろう付け用アルミニウム合金
ブレージングシートの製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an aluminum alloy brazing sheet for vacuum brazing, which is suitable for vacuum brazing of aluminum heat exchangers such as a drone cup type oil cooler, evaporator, intercooler and radiator. Is.
【０００２】[0002]
【従来の技術】近年、アルミニウム合金製構造体のろう
付けに、フラックスを必要としない真空ブレージング法
が開発され、公害上の心配がない事から盛んに行われる
ようになってきた。真空ブレージングはアルミニウム又
はアルミニウム合金を芯材とし、その片面または両面に
アルミニウム合金を皮材としてクラッドしたブレージン
グシートを用いて真空中でろう付け加熱を行う方法で、
アルミニウム合金製の熱交換器を始め各種構造体のろう
付けに用いられる。2. Description of the Related Art In recent years, a vacuum brazing method which does not require flux has been developed for brazing an aluminum alloy structure, and it has been actively used because of no fear of pollution. Vacuum brazing is a method of brazing and heating in vacuum using a brazing sheet in which aluminum or an aluminum alloy is used as a core material and one or both surfaces of which is clad with an aluminum alloy as a skin material.
Used for brazing various structures such as aluminum alloy heat exchangers.
【０００３】真空ろう付け用ブレージングシートには各
種の芯材用アルミニウム合金と皮材用アルミニウム合金
ろう材が開発され、現在ではＪＩＳ Ｚ ３２６３によ
り規格化されている。熱交換器に使用される真空ろう付
け用ブレージングシートとしては、芯材としてＪＩＳ
Ａ ３００３（Ａｌ−０．１５wt％Ｃｕ−１．１wt％Ｍ
ｎ）、ＪＩＳ Ａ ３００５（Ａｌ−１．１wt％Ｍｎ−
０．４wt％Ｍｇ）、ＪＩＳ Ａ ３１０５（Ａｌ−０．
６wt％Ｍｎ−０．６wt％Ｍｇ）合金を用い、皮材として
ＪＩＳ ＢＡ ４００４（Ａｌ−１０wt％Ｓｉ−１．５
wt％Ｍｇ）、ＪＩＳ ＡＡ ４１０４（Ａｌ−１０wt％
Ｓｉ−１．２wt％Ｍｇ−０．１wt％Ｂｉ）合金を用いる
のが通常である。またブレージングシートの板厚は０．
５〜１．２mmであり、皮材は５〜１５％のクラッド率で
片面あるいは両面にクラッドされる。Various aluminum alloys for core materials and aluminum alloy brazing materials for skin materials have been developed for brazing sheets for vacuum brazing, and are now standardized by JIS Z 3263. As a brazing sheet for vacuum brazing used in a heat exchanger, JIS is used as a core material.
A 3003 (Al-0.15 wt% Cu-1.1 wt% M
n), JIS A 3005 (Al-1.1 wt% Mn-
0.4 wt% Mg), JIS A 3105 (Al-0.
A 6 wt% Mn-0.6 wt% Mg) alloy was used as a skin material according to JIS BA 4004 (Al-10 wt% Si-1.5).
wt% Mg), JIS AA 4104 (Al-10 wt%
It is usual to use a Si-1.2 wt% Mg-0.1 wt% Bi) alloy. The thickness of the brazing sheet is 0.
The skin material is clad on one or both sides with a clad ratio of 5 to 15%.
【０００４】こうした真空ろう付け用ブレージングシー
トを用いた中空構造を有するアルミニウム合金製熱交換
としてはドロンカップタイプのエバポレーター、オイル
クーラー、ラジエーターなどが製造されている。例えば
ドロンカップタイプのエバポレーターは、ブレージング
シートより図１及び図２に示す部材(1) を作製し、この
部材(1) を図３に示すように積層し、積層した部材(1)
間にコルゲートフィン(2) を配置してろう付けしたもの
で、ろう付けは１０-5〜１０-4Torr台の真空中で約６０
０℃に加熱して行われる。この真空ろう付けではブレー
ジングシートの皮材中に添加されたＭｇが４００℃付近
から徐々に蒸発し始め、炉内酸化性ガスをＨ2 Ｏ＋Ｍｇ
→ＭｇＯ＋Ｈ2 、Ｏ2 ＋２Ｍｇ→２ＭｇＯのゲッター作
用と皮材表面の酸化皮膜の破壊作用を引き起こしてろう
付けを可能にする。As a heat exchange made of an aluminum alloy having a hollow structure using such a brazing sheet for vacuum brazing, a drone cup type evaporator, an oil cooler, a radiator and the like are manufactured. For example, in a Delon cup type evaporator, a member (1) shown in FIGS. 1 and 2 is produced from a brazing sheet, and the member (1) is laminated as shown in FIG.
It is brazed with corrugated fins (2) placed between them, and brazing is performed in a vacuum of the order of 10 -5 to 10 -4 Torr to about 60.
It is performed by heating to 0 ° C. In this vacuum brazing, Mg added to the skin material of the brazing sheet gradually begins to evaporate at around 400 ° C., and the oxidizing gas in the furnace is replaced with H 2 O + Mg.
→ MgO + H 2 , O 2 + 2Mg → 2MgO causes the gettering action and the destructive action of the oxide film on the surface of the skin material to enable brazing.
【０００５】[0005]
【発明が解決しようとする課題】真空ろう付けの場合、
ろう付け性に影響を及ぼす大きな要因の１つとして表面
の性状がある。例えば皮材表面に油、ゴミ等の汚れや厚
い酸化皮膜が付着した場合、ろう付け性が低下してしま
う。そこでこれらの問題を解決してろう付け性を向上す
るために、通常は最終焼鈍前の洗浄により表面に付着し
た汚れや酸化皮膜の除去を行う。しかし洗浄を行った場
合でも条件によりろう付け性が不安定になり結果として
ろう付け不良が発生することがある。In the case of vacuum brazing,
The surface property is one of the major factors that influence the brazing property. For example, when dirt such as oil or dust or a thick oxide film adheres to the surface of the skin material, the brazing property is deteriorated. Therefore, in order to solve these problems and improve the brazing property, the dirt and oxide film adhering to the surface are usually removed by cleaning before the final annealing. However, even when cleaning is performed, the brazing property becomes unstable depending on the conditions, and as a result, brazing failure may occur.
【０００６】[0006]
【課題を解決するための手段】発明者らは、上記ろう付
け不良の発生原因について種々検討した結果、以下の結
論を得た。即ち洗浄を過度に行った場合、皮材中のアル
ミニウムが優先的にエッチングされ、皮材内部のＳｉ粒
子が皮材表面に露出する。そのＳｉ粒子は高融点である
ためろう付け温度まで昇温しても表面に融解しないで残
存し、皮材同士あるいは皮材と部材の濡れ性を低下させ
て、結果としてろう付け性を低下させる。そして、洗浄
の際の皮材表面のエッチング量と、ろう付け性との間の
関係を見出し、本発明に到ったものである。As a result of various studies on the cause of the above-mentioned brazing failure, the inventors have obtained the following conclusions. That is, when cleaning is performed excessively, aluminum in the skin material is preferentially etched, and Si particles inside the skin material are exposed on the surface of the skin material. Since the Si particles have a high melting point, they remain on the surface without being melted even when the temperature is raised to the brazing temperature, and the wettability between the skin materials or between the skin material and the member is deteriorated, resulting in deterioration of the brazing property. .. Then, the inventors have found the relationship between the amount of etching on the surface of the skin material at the time of cleaning and the brazing property, and arrived at the present invention.
【０００７】即ち、本発明は、ＡｌまたはＡｌ合金から
なる芯材の片面または両面にＡｌ−Ｓｉ−Ｍｇ系合金ま
たはＡｌ−Ｓｉ−Ｍｇ系合金からなる皮材をクラッドし
た真空ろう付け用アルミニウム合金ブレージングシート
を製造する際に最終焼鈍前の洗浄において、皮材表面の
エッチング量を表面からの深さ３．５μｍ以内とするこ
とを特徴とする真空ろう付け用アルミニウム合金ブレー
ジングシートの製造方法である。That is, the present invention is an aluminum alloy for vacuum brazing in which one or both sides of a core material made of Al or an Al alloy is clad with a skin material made of an Al-Si-Mg type alloy or an Al-Si-Mg type alloy. A method for producing an aluminum alloy brazing sheet for vacuum brazing, characterized in that an etching amount of the surface of the skin material is within a depth of 3.5 μm from the surface in cleaning before final annealing when producing the brazing sheet. ..
【０００８】[0008]
【作用】本発明に用いる芯材は、通常真空ろう付けに用
いられる合金（ＪＩＳ Ａ ３００３、ＪＩＳ Ａ ３
００５、ＪＩＳ Ａ ３１０５）、またはＡｌ−Ｍｎ−
Ｃｕ系（３ＸＸＸ系の改良）、Ａｌ−Ｍｇ−Ｓｉ−Ｃｕ
−Ｍｎ系（６ＸＸＸ系の改良）等の開発合金ならば特に
問題にならない。また皮材は、通常真空ろう付けに用い
られるＡｌ−Ｓｉ−Ｍｇ系合金（ＪＩＳ ＢＡ ４００
４）、Ａｌ−Ｓｉ−Ｍｇ−Ｂｉ系合金（ＪＩＳ ＡＡ
４１０１）ならば特に問題にならない。真空ろう付け用
アルミニウム合金ブレージングシートは、ろう付け性を
向上させるために最終焼鈍前に洗浄を行い、表面に付着
した油、ゴミ等の汚れや酸化皮膜を除去することが通常
である。The core material used in the present invention is an alloy normally used for vacuum brazing (JIS A 3003, JIS A 3
005, JIS A 3105), or Al-Mn-
Cu system (improvement of 3XXX system), Al-Mg-Si-Cu
There is no particular problem if the alloy is a developed alloy such as -Mn type (improved 6XXX type). The skin material is an Al-Si-Mg alloy (JIS BA 400, which is usually used for vacuum brazing.
4), Al-Si-Mg-Bi-based alloy (JIS AA
4101) does not cause any particular problem. The aluminum alloy brazing sheet for vacuum brazing is usually washed before the final annealing in order to improve the brazing property, to remove dirt such as oil and dust adhering to the surface and an oxide film.
【０００９】本発明において、最終焼鈍前の洗浄におい
て、皮材表面のエッチング量を表面からの深さ３．５μ
ｍ以内としたのは、３．５μｍを超えるエッチングを行
うと皮材表面に多数のＳｉ粒子が露出してしまい、ろう
付け加熱時に高融点のＳｉ粒子が融解せず、皮材表面に
多数残留し皮材同士あるいは、皮材と部材の濡れ性を低
下させ、結果としてろう付け性を低下させるためであ
る。なお、洗浄後、表面に露出したＳｉ粒子の数は３
０，０００個／mm2 以下であることが望ましい。In the present invention, in the cleaning before the final annealing, the etching amount of the surface of the skin material is set to 3.5 μm from the depth of the surface.
The reason for setting m within a range is that if etching is performed to exceed 3.5 μm, a large number of Si particles are exposed on the surface of the skin material, and the Si particles having a high melting point do not melt during heating for brazing, and many remain on the surface of the skin material. This is because the wettability between the leather materials or between the leather material and the member is reduced, and as a result, the brazing property is reduced. After cleaning, the number of Si particles exposed on the surface was 3
It is desirable that the number is not more than 0000 / mm 2 .
【００１０】[0010]
【実施例】以下本発明を実施例により更に詳細に説明す
る。ＪＩＳ Ａ ３００３合金からなる芯材の両面に、
ＪＩＳ Ａ ４１０１合金からなる皮材を片面あたり１
０％クラッドし、熱間圧延、冷間圧延を施して厚さ０．
６mmのブレージングシートを作製し、表１に示すような
洗浄方法でエッチングを行った。式(1) により板厚方向
の片面当たりのエッチング量を求めた。但し板厚に対し
て面積を広くすることにより、側面からのエッチング量
を無視した。EXAMPLES The present invention will now be described in more detail with reference to examples. On both sides of the core material made of JIS A 3003 alloy,
A skin material made of JIS A 4101 alloy is used for each side 1
0% clad, hot rolled, cold rolled to a thickness of 0.
A 6 mm brazing sheet was prepared and etched by the cleaning method shown in Table 1. The amount of etching per one side in the plate thickness direction was obtained by the formula (1). However, the etching amount from the side surface was neglected by making the area larger than the plate thickness.
【００１１】[0011]
【数１】 [Equation 1]
【００１２】またエッチング後の皮材表面を走査型電子
顕微鏡で観察し、表面に露出したＳｉ粒子を画像解析し
て単位面積当たりのＳｉ粒子数を求めた。これらのブレ
ージングシートを最終焼鈍して供試材とし、間隙充填試
験によりろう付け性評価を行った。間隙充填試験は、図
４に示すように母材（ＪＩＳ Ａ ３００３合金）(3)
上にブレージングシート(4) をＳＵＳ棒(5)で片側に間
隙を作り真空ろう付けを行い、ろう付け加熱後のフィレ
ット(6) の長さ（ｌ）を測定した。ろう付け条件は、真
空度５×１０-5Torr、加熱温度５９５℃で３min 保持し
た。表１にエッチング量、単位面積当たりのＳｉ粒子数
およびフィレット長さを示す。Further, the surface of the skin material after etching was observed with a scanning electron microscope, and the Si particles exposed on the surface were image-analyzed to determine the number of Si particles per unit area. These brazing sheets were finally annealed to obtain test materials, and brazability was evaluated by a gap filling test. As for the gap filling test, as shown in Fig. 4, the base metal (JIS A 3003 alloy) (3)
The brazing sheet (4) was vacuum-brazed by making a gap on one side with a SUS rod (5), and the length (l) of the fillet (6) after brazing and heating was measured. The brazing conditions were such that the degree of vacuum was 5 × 10 −5 Torr and the heating temperature was 595 ° C. for 3 minutes. Table 1 shows the etching amount, the number of Si particles per unit area, and the fillet length.
【００１３】[0013]
【表１】 [Table 1]
【００１４】表１から明らかなように皮材表面のエッチ
ング量を規制した本発明例No．１〜７は、エッチング量
が本発明の範囲より多い比較例No．８〜１３、従来例N
o．１５、洗浄しない比較例No．１４と比較して、フィ
レット長さが長くろう付け性が良好であることが判る。As is apparent from Table 1, Example No. 1 of the present invention in which the etching amount on the surface of the skin material was regulated. Comparative Examples Nos. 1 to 7 have etching amounts larger than the range of the present invention. 8-13, Conventional example N
o. No. 15, Comparative Example No. As compared with No. 14, it is understood that the fillet length is long and the brazing property is good.
【００１５】[0015]
【発明の効果】以上詳述したように、本発明法による真
空ろう付け用アルミニウム合金ブレージングシートを使
用することにより、自動車用クーラー用ドロンカップタ
イプのオイルクーラー、エバポレーター、インタークー
ラー又はラジエーター等の真空ろう付け性を向上させ、
安定な操業が行える等工業上顕著な効果を奏する。As described in detail above, by using the aluminum alloy brazing sheet for vacuum brazing according to the method of the present invention, vacuum brazing of a drone cup type oil cooler for automobile coolers, evaporators, intercoolers, radiators, etc. Improve the attachability,
It has remarkable industrial effects such as stable operation.
【図１】ドロンカップエバポレーター用部材（成形体）
を示す平面図。FIG. 1 Member (molded body) for Delon cup evaporator
FIG.
【図２】図２のＢ−Ｂ′線における断面図。FIG. 2 is a sectional view taken along line BB ′ of FIG.
【図３】ドロンカップエバポレーターの一例を示す斜視
図。FIG. 3 is a perspective view showing an example of a Delon cup evaporator.
【図４】間隙充填試験における試験片および試験要領を
説明する図。FIG. 4 is a diagram illustrating a test piece and a test procedure in a gap filling test.
１ 部材 ２ コルゲートフィン ３ 母材 ４ ブレージングシート ５ ＳＵＳ棒 ６ フィレット 1 member 2 corrugated fin 3 base material 4 brazing sheet 5 SUS rod 6 fillet
Claims (1)
または両面にＡｌ−Ｍｇ−Ｓｉ系合金またはＡｌ−Ｍｇ
−Ｓｉ−Ｂｉ系合金からなる皮材をクラッドした真空ろ
う付け用アルミニウム合金ブレージングシートを製造す
る際に、最終焼鈍前の洗浄において皮材表面のエッチン
グ量を表面からの深さ３．５μｍ以内とすることを特徴
とする真空ろう付け用アルミニウム合金ブレージングシ
ートの製造方法。1. An Al—Mg—Si alloy or Al—Mg on one or both sides of a core material made of Al or Al alloy.
When manufacturing an aluminum alloy brazing sheet for vacuum brazing in which a skin material made of a -Si-Bi alloy is clad, the etching amount on the surface of the skin material is set to 3.5 μm or less from the surface in cleaning before final annealing. A method for manufacturing an aluminum alloy brazing sheet for vacuum brazing, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03350926A JP3072931B2 (en) | 1991-12-10 | 1991-12-10 | Manufacturing method of aluminum alloy brazing sheet for vacuum brazing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03350926A JP3072931B2 (en) | 1991-12-10 | 1991-12-10 | Manufacturing method of aluminum alloy brazing sheet for vacuum brazing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05154693A true JPH05154693A (en) | 1993-06-22 |
| JP3072931B2 JP3072931B2 (en) | 2000-08-07 |
Family
ID=18413851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03350926A Expired - Fee Related JP3072931B2 (en) | 1991-12-10 | 1991-12-10 | Manufacturing method of aluminum alloy brazing sheet for vacuum brazing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3072931B2 (en) |
Cited By (5)
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|---|---|---|---|---|
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| EP2660043A1 (en) * | 2012-05-04 | 2013-11-06 | Hydro Aluminium Rolled Products GmbH | Aluminium compound material for flux free soldering |
| WO2015086802A1 (en) | 2013-12-13 | 2015-06-18 | Hydro Aluminium Rolled Products Gmbh | Flux-free joining of aluminum composite materials |
| WO2017060236A1 (en) | 2015-10-05 | 2017-04-13 | Hydro Aluminium Rolled Products Gmbh | Aluminum composite material for use in thermal flux-free joining methods and method for producing same |
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-
1991
- 1991-12-10 JP JP03350926A patent/JP3072931B2/en not_active Expired - Fee Related
Cited By (10)
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|---|---|---|---|---|
| WO2013105637A1 (en) * | 2012-01-13 | 2013-07-18 | 古河スカイ株式会社 | Brazing sheet for flux-free brazing and method for producing same |
| JP2013144299A (en) * | 2012-01-13 | 2013-07-25 | Furukawa-Sky Aluminum Corp | Brazing sheet for non-flux brazing, and method for manufacturing the same |
| CN104039497A (en) * | 2012-01-13 | 2014-09-10 | 株式会社Uacj | Brazing sheet for flux-free brazing and method for producing same |
| EP2660043A1 (en) * | 2012-05-04 | 2013-11-06 | Hydro Aluminium Rolled Products GmbH | Aluminium compound material for flux free soldering |
| WO2013164466A1 (en) | 2012-05-04 | 2013-11-07 | Hydro Aluminium Rolled Products Gmbh | Aluminium composite material for flux-free soldering |
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| WO2015086802A1 (en) | 2013-12-13 | 2015-06-18 | Hydro Aluminium Rolled Products Gmbh | Flux-free joining of aluminum composite materials |
| US10773325B2 (en) | 2013-12-13 | 2020-09-15 | Hydro Aluminium Rolled Products Gmbh | Flux-free joining of aluminium composite materials |
| WO2017060236A1 (en) | 2015-10-05 | 2017-04-13 | Hydro Aluminium Rolled Products Gmbh | Aluminum composite material for use in thermal flux-free joining methods and method for producing same |
| WO2017060234A1 (en) | 2015-10-05 | 2017-04-13 | Hydro Aluminium Rolled Products Gmbh | Aluminum composite material for use in thermal flux-free joining methods and method for producing same |
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| JP3072931B2 (en) | 2000-08-07 |
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