JPH0246969A - Production of brazed flat aluminum tube for heat exchanger - Google Patents
Production of brazed flat aluminum tube for heat exchangerInfo
- Publication number
- JPH0246969A JPH0246969A JP19720388A JP19720388A JPH0246969A JP H0246969 A JPH0246969 A JP H0246969A JP 19720388 A JP19720388 A JP 19720388A JP 19720388 A JP19720388 A JP 19720388A JP H0246969 A JPH0246969 A JP H0246969A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- thermally
- heat exchanger
- brazing
- aluminum tube
- 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.)
- Pending
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 35
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000005219 brazing Methods 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 238000001192 hot extrusion Methods 0.000 claims abstract description 5
- 229910021364 Al-Si alloy Inorganic materials 0.000 claims abstract 3
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 12
- 229910052725 zinc Inorganic materials 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 26
- 239000000956 alloy Substances 0.000 abstract description 26
- 238000005260 corrosion Methods 0.000 abstract description 14
- 230000007797 corrosion Effects 0.000 abstract description 12
- 239000007921 spray Substances 0.000 abstract description 8
- 238000005507 spraying Methods 0.000 abstract description 5
- 238000007751 thermal spraying Methods 0.000 abstract description 5
- 229910018125 Al-Si Inorganic materials 0.000 abstract 2
- 229910018520 Al—Si Inorganic materials 0.000 abstract 2
- 239000000463 material Substances 0.000 description 19
- 229910000676 Si alloy Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はＺｎ又はＺｎ合金で防食処理を施したアルミ偏
平チューブの表面にＡ１−５；系合金ろう材を被覆した
熱交換器用ろう付アルミ偏平チューブの製造方法に関す
るものである。Detailed Description of the Invention (Field of Industrial Application) The present invention is a brazing aluminum for heat exchanger in which the surface of an aluminum flat tube that has been anti-corrosion treated with Zn or Zn alloy is coated with A1-5 alloy brazing material. The present invention relates to a method for manufacturing a flat tube.
〔従来の技術及び発明が解決しようとする課題〕一般に
アルミニウム又はアルミニウム合金からなる偏平チュー
ブを用いた熱交換器は、第４図に示すようにアルミ偏平
チューブ（４）を蛇行状に折り曲げ、チューブ（４）間
に表面にＡ１−Ｓｉ系合金ろう材を積層したフィン（５
）と組合せ、ろう付により接合している。またチューブ
（４）と配管（７）を接続するユニオン（６）の接合に
は、接合部にＡ１−５ｉ系合金ろう材の線材を置ろうと
して配置し、ろう付けにより接合している。[Prior art and problems to be solved by the invention] Generally, a heat exchanger using a flat tube made of aluminum or an aluminum alloy is made by bending an aluminum flat tube (4) into a meandering shape as shown in Fig. 4. (4) Fins with A1-Si alloy brazing material laminated on the surface (5)
) and are joined by brazing. Further, to join the union (6) that connects the tube (4) and the pipe (7), a wire rod of A1-5i alloy brazing material is placed at the joint part, and the union is performed by brazing.
アルミニウム又はアルミニウム合金は表面の自然酸化皮
膜が不動態として強固で緻密なため、腐食は孔食形態で
成長する。そのため使用環境によっては孔食を発生し、
貫通事故を起すことかめる。このため熱交換器に使用す
るアルミ偏平チューブの表面には犠牲効果によりチュー
ブを保護するため、Ｚｎ又はＺｎ合金を被覆することが
必要とされている。Since the natural oxide film on the surface of aluminum or aluminum alloy is strong and dense as a passive state, corrosion grows in the form of pitting corrosion. Therefore, depending on the usage environment, pitting corrosion may occur.
This may cause a penetration accident. For this reason, it is necessary to coat the surface of aluminum flat tubes used in heat exchangers with Zn or Zn alloy in order to protect the tubes due to the sacrificial effect.
アルミ偏平チューブにＺｎ又はＺｎ合金を被覆するため
には、一般に複合管とする必要があリ、通常のベアー管
に比べてコスト高となる。In order to coat an aluminum flat tube with Zn or a Zn alloy, it is generally necessary to make it into a composite tube, which is more expensive than a normal bare tube.
またＡ１−Ｓｉ系合金ろう材を積層したフィン材は、ろ
う材を積層しないベアーのフィン材に比べて圧延工程で
の加工コストが高く、コスト高となる。更にアルミ偏平
チューブと配管を接続するユニオンのろう付けに置ろう
を使用しているが、置ろうの切断や曲げ加工に手数がか
かり、コストを高める原因となっている。Furthermore, the fin material in which the A1-Si alloy brazing material is laminated has a higher processing cost in the rolling process than the bare fin material in which the brazing material is not laminated. Furthermore, while braze is used to braze the union that connects the flat aluminum tube and piping, cutting and bending the braze is time-consuming and increases costs.
このため耐食性が良好で、ベアーのフィン材を用いたろ
う付けが可能なろう付アルミ偏平チューブを安価に製造
することが望まれている。Therefore, it is desired to inexpensively produce a brazed aluminum flat tube that has good corrosion resistance and can be brazed using bare fin material.
〔課題を解決するための手段および作用〕本発明はこれ
に鑑み種々検討の結果、耐食性が良好で、ベアーのフィ
ン材を用いたろう付けが可能で、安価に製造することが
できる熱交換器用ろう付アルミ偏平チューブの製造方法
を開発したものである。[Means and effects for solving the problems] In view of this, the present invention has been developed as a result of various studies and has been developed to provide a solder for heat exchangers that has good corrosion resistance, can be brazed using bare fin material, and can be manufactured at low cost. We have developed a manufacturing method for flat aluminum tubes with attached aluminum tubes.
即ち本発明製造法は、アルミニウム又はアルミニウム合
金からなる熱交換器用アルミ偏平チューブの熱間押出し
において、押出直後のチューブ表面にＺｎ又はＺｎ合金
を溶射し、続いてその上にＡ１−５ ｉ系合金ろう材を
溶射することを特徴とするものである。That is, in the manufacturing method of the present invention, in hot extrusion of aluminum flat tubes for heat exchangers made of aluminum or aluminum alloys, Zn or Zn alloy is thermally sprayed on the tube surface immediately after extrusion, and then A1-5 i-based alloy is applied thereon. It is characterized by thermally spraying a brazing filler metal.
第１図に示すアルミ偏平チューブは通常熱間押出法で製
造される。本発明製造方法はこの熱間押出法において、
第２図に示すように押出機（１）のすぐ後にＺｎ又はＺ
ｎ合金の溶射ガン（２）、 （２°）を設け、押出した
アルミ偏平チューブ（４）の表面にＺｎ又はＺｎ合金を
溶射する。次にそのすぐ後にＡ、１！−８ｉ系合金ろう
材の溶射ガン（３）、 （３°）を設け、Ｚｎ又は７−
ｎ合金を溶射した後にＡ１−５＋系合金ろう材の溶射を
行なう。The aluminum flat tube shown in FIG. 1 is usually manufactured by hot extrusion. In the production method of the present invention, in this hot extrusion method,
As shown in Figure 2, Zn or Z is added immediately after the extruder (1).
An n-alloy thermal spray gun (2), (2°) is provided, and Zn or Zn alloy is thermally sprayed onto the surface of the extruded aluminum flat tube (4). Next, right after that, A, 1! A thermal spray gun (3) (3°) for -8i alloy brazing filler metal is installed, and Zn or 7-
After the n-alloy is thermally sprayed, the A1-5+ alloy brazing filler metal is thermally sprayed.
Ｚｒｌ又はＺｎ合金とＡ１−５ ｉ系合金ろう材の溶射
は極めて容易で安価に実施され、しかも最初に溶射した
Ｚｎ又はＺｎ合金は短時間でアルミ偏平チューブの表面
下に拡散して合金層を形成し、その後Ａ！−３ｒ系合金
ろう材がＺｎ又はＺｎ合金層上に溶射されても’ｌ−ｎ
又はＺｎ合金層は有効に作用し、良好な耐食性を示すと
共にＡ１−Ｓｉ系合金ろう材のろう付は性を阻害するよ
うなことはない。このように本発明チューブはＺｎ又は
Ｚｎ合金による耐食処理とＡ１−Ｓｉ系合金ろう材の被
覆が同時に行なわれるため、安価に提供することが可能
となり、熱交換器のコストを低減する。Thermal spraying of Zrl or Zn alloy and A1-5 i-based alloy filler metal is extremely easy and inexpensive, and the initially sprayed Zn or Zn alloy diffuses under the surface of the aluminum flat tube in a short time to form an alloy layer. Form, then A! - Even if the 3R alloy brazing filler metal is sprayed onto the Zn or Zn alloy layer, 'l-n
Alternatively, the Zn alloy layer acts effectively and exhibits good corrosion resistance, and the brazing properties of the A1-Si alloy brazing material are not impaired. As described above, since the tube of the present invention is subjected to corrosion-resistant treatment with Zn or Zn alloy and coating with A1-Si alloy brazing material at the same time, it can be provided at low cost, reducing the cost of the heat exchanger.
以下本発明を実施例について説明する。The present invention will be described below with reference to Examples.
（実施例）
ＪＩＳ Ａ １０５０合金からなる外径２１９ａｎ、長
さ５００ ｍのビレットを用い、第１図に示す肉厚０．
８ｍのアルミ偏平チューブの押出しを行なった。その押
出しにおいて第２図に示すように押出機（１）のすぐ後
にＺｎの溶射ガン（２）、 （２°）とその俊にＪＩＳ
８Ａ ４０４５合金＜Ａ１−Ｓｉ系合金）ろう材の溶
射ガン（３）、 （３’）を設け、押出したアルミ偏平
チューブ（４）の表面に先ずＺｎを溶射した後、Ａ１−
Ｓｉ系合金ろう材の溶射を行なった。その溶射条件を第
１表に示す。(Example) A billet made of JIS A 1050 alloy with an outer diameter of 219 ann and a length of 500 m was used, and the wall thickness as shown in FIG.
An 8 m flat aluminum tube was extruded. During extrusion, as shown in Figure 2, immediately after the extruder (1), there is a Zn thermal spray gun (2), (2°) and a JIS
8A 4045 alloy <A1-Si alloy) A brazing metal spray gun (3), (3') is installed, and Zn is first sprayed onto the surface of the extruded aluminum flat tube (4), and then A1-
A Si-based alloy brazing filler metal was thermally sprayed. The thermal spraying conditions are shown in Table 1.
Ｚｎ線材
ろう材
電 流
電 圧
空気圧力
アルミ押出速度
第１表
直径１．６＃ 純度９９，９％以上
直径１．６ ＩｒＩＩｆＩＪＩＳ ＢＡ ４０４５合金
５Ａ
０Ｖ
３．５幻／ｃｔＡ
２５ｍ／ｎ＋＋ｎ
Ｚｎ′ｆ＆ｖｌｉは１５ｇ／ｍ、Ａ１−５ｔ系合金ろう
材の被覆厚さは約４０μｍとした。このようにして製造
した本発明熱交換器用ろう付アルミ偏平チューブを蛇行
状に折り曲げ、ＪＩＳ Ａ ３００３合金かうするベア
ーのコルゲートフィンと組合せ、フッ化物系フラックス
を塗布してろう付けを行ない、第４図に示す熱交換器を
作製した。ろう付は雰囲気はＮガスとし、ろう付温度は
６００°Ｃとした。Zn wire brazing material Current Current Pressure Air pressure Aluminum extrusion speed Table 1 Diameter 1.6# Purity 99.9% or more Diameter 1.6 IrIIIfIJIS BA 4045 alloy 5A 0V 3.5 phantom/ctA 25m/n++n Zn'f&vli is The coating thickness of the A1-5t alloy brazing material was approximately 40 μm. The thus produced brazed aluminum flat tube for the heat exchanger of the present invention is bent into a serpentine shape, combined with bare corrugated fins made of JIS A 3003 alloy, coated with fluoride flux, and brazed. The heat exchanger shown in the figure was manufactured. The atmosphere for brazing was N gas, and the brazing temperature was 600°C.
得られた熱交換器の偏平チューブとフィンの接着率は１
００％で良好なフィレットを作る十分なろう付は性が得
られた。またこの熱交換器についてキャス試験を行ない
、その結果をＺｎ溶射を行なうことなくＡＺ−Ｓ ＋合
金ろう材を溶射したアルミ偏平チューブを用いた熱交換
器と比較して第３図に示した。The adhesion rate between the flat tubes and fins of the obtained heat exchanger was 1
At 0.00%, sufficient brazing properties were obtained to create a good fillet. A CAST test was also conducted on this heat exchanger, and the results are shown in FIG. 3 in comparison with a heat exchanger using flat aluminum tubes sprayed with AZ-S + alloy brazing material without Zn spraying.
図から明らかなように、Ｚｎ溶射を行なうことなく、Ａ
、ｊ−Ｓｉ合金ろう材を溶射した比較材を用いた熱交換
器では７２０時間で偏平チューブに貫通孔（０，８７１
１７１以上）を生じたが、Ｚｎ溶射を行なった後、Ａ１
−８ｉ系合金ろう材を溶射した本発明材を用いた熱交換
器では偏平チューブの孔食は７２０時間で約０．０５ｍ
であった。As is clear from the figure, A
In a heat exchanger using a comparative material sprayed with j-Si alloy brazing material, through holes (0,871
171 or higher), but after Zn thermal spraying, A1
- In a heat exchanger using the present invention material sprayed with an 8i alloy brazing filler metal, the pitting corrosion of the flat tube is approximately 0.05 m in 720 hours.
Met.
（発明の効果）
本発明によれば、従来別々に行なわれてきたＺｎによる
防食処理と、Ａｆ−Ｓｉ系合金ろう材の被覆を同時に行
なうことが可能となり、耐食性及びろう付は性に優れた
熱交換器用ろう付アルミ偏平チューブを安価に提供し、
熱交換器のコストを低減することができる等工業上顕著
な効果を奏するものである。(Effects of the Invention) According to the present invention, it is now possible to simultaneously perform anti-corrosion treatment with Zn, which has conventionally been performed separately, and coating with Af-Si alloy brazing material, resulting in excellent corrosion resistance and brazing performance. We provide brazed aluminum flat tubes for heat exchangers at low prices.
This has significant industrial effects such as being able to reduce the cost of heat exchangers.
第１図はアルミ偏平チューブの一例を示す断面図、第２
図は本発明製造方法の一例を示す説明図、第３図はキャ
ス試験結果を示すグラフ、第４図はアルミ偏平チューブ
を用いた熱交換器の一例を示す斜視図である。
１、押出殿
２．２’ 、Ｚｎ又はＺｎ合金の溶射ガン３、３’ 、
Ａ１−５ ｉ系合金ろう材の溶射ガン４、アルミ偏平
チューブ
５、コルゲートフィン
６、ユニオン
７、配管
第１図
第３図
今−人名式＃期間（Ｈｒ）
第４図Figure 1 is a sectional view showing an example of an aluminum flat tube, Figure 2 is a cross-sectional view showing an example of an aluminum flat tube.
FIG. 3 is an explanatory diagram showing an example of the manufacturing method of the present invention, FIG. 3 is a graph showing the results of a CAST test, and FIG. 4 is a perspective view showing an example of a heat exchanger using flat aluminum tubes. 1. Extrusion chamber 2.2', Zn or Zn alloy thermal spray gun 3, 3',
A1-5 Thermal spray gun 4 for i-based alloy brazing material, flat aluminum tube 5, corrugated fin 6, union 7, piping Figure 1 Figure 3 Now - Name ceremony #Period (Hr) Figure 4
Claims (1)
換器用アルミ偏平チューブの熱間押出しにおいて、押出
直後のチューブ表面にＺｎ又はＺｎ合金を溶射し、続い
てその上にＡｌ−Ｓｉ系合金ろう材を溶射することを特
徴とする熱交換器用ろう付アルミ偏平チューブの製造方
法。(1) In hot extrusion of aluminum flat tubes for heat exchangers made of aluminum or aluminum alloy, Zn or Zn alloy is sprayed on the tube surface immediately after extrusion, and then an Al-Si alloy brazing filler metal is sprayed thereon. A method for manufacturing a brazed aluminum flat tube for a heat exchanger, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19720388A JPH0246969A (en) | 1988-08-09 | 1988-08-09 | Production of brazed flat aluminum tube for heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19720388A JPH0246969A (en) | 1988-08-09 | 1988-08-09 | Production of brazed flat aluminum tube for heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0246969A true JPH0246969A (en) | 1990-02-16 |
Family
ID=16370534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19720388A Pending JPH0246969A (en) | 1988-08-09 | 1988-08-09 | Production of brazed flat aluminum tube for heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0246969A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0595601A1 (en) * | 1992-10-30 | 1994-05-04 | Showa Aluminum Corporation | Brazeable aluminum material and a method of producing same |
| EP0605323A1 (en) * | 1992-12-29 | 1994-07-06 | Showa Aluminum Corporation | Corrosion-resistant and brazeable aluminum material and a method of producing same |
| WO2002024390A1 (en) * | 2000-09-25 | 2002-03-28 | Showa Denko K.K. | Method for manufacturing heat exchanger |
| JP2002361405A (en) * | 2000-09-25 | 2002-12-18 | Showa Denko Kk | Method for manufacturing heat exchanger |
| US7345390B2 (en) | 2004-04-15 | 2008-03-18 | Keiper Gmbh & Co. Kg | Drive unit of an adjuster of a vehicle seat |
| JP2010535324A (en) * | 2007-08-02 | 2010-11-18 | シェブロン ユー．エス．エー． インコーポレイテッド | Methods and compositions for passivating heat exchanger systems |
| EP2489448A1 (en) * | 2011-02-16 | 2012-08-22 | Alcan Centre De Recherches De Voreppe | In-line surface treatment for obtaining aluminium extrusions coated with a corrosion-resistant layer and extrusions thus obtained |
-
1988
- 1988-08-09 JP JP19720388A patent/JPH0246969A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0595601A1 (en) * | 1992-10-30 | 1994-05-04 | Showa Aluminum Corporation | Brazeable aluminum material and a method of producing same |
| US5594930A (en) * | 1992-10-30 | 1997-01-14 | Showa Aluminum Corporation | Brazeable aluminum material and a method of producing same |
| EP0605323A1 (en) * | 1992-12-29 | 1994-07-06 | Showa Aluminum Corporation | Corrosion-resistant and brazeable aluminum material and a method of producing same |
| WO2002024390A1 (en) * | 2000-09-25 | 2002-03-28 | Showa Denko K.K. | Method for manufacturing heat exchanger |
| JP2002361405A (en) * | 2000-09-25 | 2002-12-18 | Showa Denko Kk | Method for manufacturing heat exchanger |
| US7345390B2 (en) | 2004-04-15 | 2008-03-18 | Keiper Gmbh & Co. Kg | Drive unit of an adjuster of a vehicle seat |
| JP2010535324A (en) * | 2007-08-02 | 2010-11-18 | シェブロン ユー．エス．エー． インコーポレイテッド | Methods and compositions for passivating heat exchanger systems |
| EP2489448A1 (en) * | 2011-02-16 | 2012-08-22 | Alcan Centre De Recherches De Voreppe | In-line surface treatment for obtaining aluminium extrusions coated with a corrosion-resistant layer and extrusions thus obtained |
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