JPH11790A - Filler metal coated al or al alloy extruding tube for heat exchanger - Google Patents
Filler metal coated al or al alloy extruding tube for heat exchangerInfo
- Publication number
- JPH11790A JPH11790A JP15231397A JP15231397A JPH11790A JP H11790 A JPH11790 A JP H11790A JP 15231397 A JP15231397 A JP 15231397A JP 15231397 A JP15231397 A JP 15231397A JP H11790 A JPH11790 A JP H11790A
- Authority
- JP
- Japan
- Prior art keywords
- brazing
- alloy
- powder
- weight
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
- C23C28/025—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only with at least one zinc-based layer
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Extrusion Of Metal (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、耐食性に優れた
熱交換器を製造するためのろう材使用量が少なくかつろ
う付け性に優れた熱交換器用ろう材被覆AlまたはAl
合金押出チューブに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brazing material coating Al or Al for a heat exchanger which uses a small amount of brazing material and has excellent brazing properties for producing a heat exchanger having excellent corrosion resistance.
It relates to an alloy extruded tube.
【0002】[0002]
【従来の技術】従来、熱交換器の組立構造材としてろう
材被覆AlまたはAl合金押出チューブを用いることが
知られており、該ろう材被覆AlまたはAl合金押出チ
ューブは、図3の斜視図に示されるように、複数の穴4
を有する断面偏平状のAlまたはAl合金押出チューブ
3の表面にSi:6.8〜13.0重量%を含み、残部
がAlおよび不可避不純物からなる組成のAl合金粉末
をフラックスと混合したり、これにバインダ樹脂および
溶剤と共に混合してスラリー状にしたろう材を塗布する
ことによりろう塗布層2´を形成したろう材被覆Alま
たはAl合金押出チューブ1´を用いることが知られて
いる。2. Description of the Related Art Conventionally, it has been known to use a brazing material-coated Al or Al alloy extruded tube as an assembly structural material of a heat exchanger. The brazing material-coated Al or Al alloy extruded tube is a perspective view of FIG. As shown in FIG.
The surface of the Al or Al alloy extruded tube 3 having a flat cross section having Si: 6.8 to 13.0% by weight, and the balance is mixed with Al alloy powder having a composition composed of Al and inevitable impurities, It is known to use a brazing material-coated Al or Al alloy extruded tube 1 'formed by applying a brazing material mixed with a binder resin and a solvent into a slurry to form a braze coating layer 2'.
【0003】この従来のろう材被覆AlまたはAl合金
押出チューブ1´を用いた熱交換器は、図4に示される
ように、ろう塗布層を形成したヘッダー部5の開口(図
示せず)にろう塗布層2´を形成したチューブ1´を挿
入し、チューブ1´と1´の間に波形のフィン7を配置
して組み立て、得られた組立体を加熱炉に装入し加熱す
ると、ヘッダー部5とチューブ3はろう付けされ固定す
ることにより作られる。As shown in FIG. 4, a heat exchanger using this conventional brazing material-coated Al or Al alloy extruded tube 1 'is provided at an opening (not shown) of a header portion 5 on which a brazing coating layer is formed. The tube 1 ′ on which the wax coating layer 2 ′ is formed is inserted, the corrugated fins 7 are arranged between the tubes 1 ′ and 1 ′, and the assembly is placed in a heating furnace and heated. The part 5 and the tube 3 are made by brazing and fixing.
【0004】[0004]
【発明が解決しようとする課題】しかし、前記従来のS
i:6.8〜13.0重量%を含み、残部がAlおよび
不可避不純物からなる組成のAl合金粉末ろう材を塗布
したろう塗布層2´を有するAlまたはAl合金押出チ
ューブは、良好なろう付け性を得るためには、Al合金
粉末ろう材の使用量を極めて多くする必要があり、高価
なろう材粉末の使用量の増加は製造コストの増加および
熱交換器の重量増加の原因になっていた。However, the conventional S
i: An Al or Al alloy extruded tube having a braze coating layer 2 ′ containing 6.8 to 13.0% by weight and having an Al alloy powder brazing material having a balance of Al and unavoidable impurities applied thereto has a good brazing property. To obtain solderability, it is necessary to use a large amount of Al alloy powder brazing material, and an increase in the amount of expensive brazing material powder increases production costs and increases the weight of the heat exchanger. I was
【0005】さらに前記従来のSi:6.8〜13.0
重量%を含み、残部がAlおよび不可避不純物からなる
組成のAl合金粉末ろう材を使用して得られた接合部や
粉末ろう材塗布部には、腐食形態としては好ましくない
孔食が発生するために、従来の熱交換器を長期間使用す
ると腐食による貫通孔が発生し、特にチューブ部分に孔
食が発生するとそれによって冷媒漏れが発生することが
あり、かかるチューブ部分の孔食による冷媒漏れは、特
に、海岸などの空気に塩分を含む地帯、または工場地帯
などの空気に腐食性ガスを含む地帯など過酷な環境下に
おいて走る車に搭載された熱交換器に多く発生するなど
の問題があった。Further, the conventional Si: 6.8 to 13.0
Pitting corrosion, which is not desirable as a form of corrosion, occurs in the joints and the powder brazing material-applied parts obtained using an Al alloy powder brazing material having a composition containing Al and inevitable impurities with the balance being Al. In addition, when a conventional heat exchanger is used for a long time, a through hole is generated due to corrosion, and particularly when pitting occurs in a tube portion, refrigerant leakage may occur. In particular, there are many problems such as the occurrence of heat exchangers mounted on vehicles running in harsh environments, such as in coastal areas where the air contains salt or in areas where the air contains corrosive gases such as factory areas. Was.
【0006】[0006]
【課題を解決するための手段】そこで、本発明者等は、
上述のような観点から、少量でろう付けが可能でろう付
け性に優れ、かつ孔食が発生することのない耐食性に優
れたろう塗布層を有する熱交換器用ろう材被覆Alまた
はAl合金押出チューブを開発すべく研究を行なった結
果、[A]AlまたはAl合金押出チューブの表面に、
(a)Si:15超〜60重量%を含有し、残りがAl
および不可避不純物からなる組成の二元系過共晶Al合
金ろう粉末からなるろう塗布層、(b)Si:15超〜
60重量%、Zn:1〜15重量%を含有し、残りがA
lおよび不可避不純物からなる組成の三元系過共晶Al
合金ろう粉末からなるろう塗布層、(c)Si:13〜
45重量%を含有し残りがAlおよび不可避不純物から
なる組成の二元系過共晶Al合金ろう粉末とSi粉末を
Si合計量が15超〜60重量%となるように混合した
混合粉末からなるろう塗布層、(d)Si:13〜45
重量%、Zn:5〜20重量%を含有し、残りがAlお
よび不可避不純物からなる組成の三元系過共晶Al合金
ろう粉末とSi粉末をSi合計量が15超〜60重量
%、Zn:1〜15重量%となるように混合した混合粉
末からなるろう塗布層を形成した熱交換器用ろう材被覆
AlまたはAl合金押出チューブは、従来のろう塗布層
を有する熱交換器用ろう材被覆AlまたはAl合金押出
チューブよりもろう材の使用量が少なくかつろう付け性
に優れている、[B]AlまたはAl合金押出チューブ
の表面にZn溶射層を形成し、このZn溶射層の上に前
記(a)〜(d)の内のいずれかのろう塗布層を形成し
た熱交換器用ろう材被覆AlまたはAl合金押出チュー
ブは、ろう付け後のAlまたはAl合金押出チューブの
侵食深さを小さくすることができ、さらにろう付けして
得られたフィレット部の耐食性が優れ、従って、耐食性
に優れた熱交換器がえられる、[C]前記(a)〜
(d)の内のいずれかのろう塗布層は、さらにフラック
スを混合してなるフラックスろう混合塗布層であっても
よい、という研究結果を得たのである。Means for Solving the Problems Accordingly, the present inventors have
In view of the above, a brazing material-coated Al or Al alloy extruded tube for a heat exchanger having a brazing coating layer excellent in brazing properties that can be brazed in a small amount, has excellent brazing properties, and has excellent corrosion resistance without causing pitting. As a result of research to develop, [A] on the surface of Al or Al alloy extruded tube,
(A) Si: contains more than 15 to 60% by weight, with the balance being Al
And a solder coating layer made of a binary hypereutectic Al alloy solder powder having a composition consisting of unavoidable impurities, and (b) Si: more than 15
60% by weight, Zn: 1 to 15% by weight, the balance being A
ternary hypereutectic Al composed of l and unavoidable impurities
Brazing coating layer made of alloy brazing powder, (c) Si: 13-
It is composed of a mixed powder obtained by mixing a binary hypereutectic Al alloy brazing powder having a composition of 45% by weight with the balance consisting of Al and inevitable impurities and Si powder so that the total amount of Si is more than 15 to 60% by weight. Wax coating layer, (d) Si: 13 to 45
Ternary hypereutectic Al alloy brazing powder and Si powder containing 5 to 20% by weight of Zn and the balance of Al and unavoidable impurities, and the total amount of Si is more than 15 to 60% by weight, Zn : A brazing material-coated Al or Al alloy extruded tube for a heat exchanger having a brazing layer formed of a mixed powder mixed to be 1 to 15% by weight is a conventional brazing material-coated Al for a heat exchanger having a conventional brazing layer. [B] A Zn sprayed layer is formed on the surface of an Al or Al alloy extruded tube, which uses less brazing material and has excellent brazing properties than the Al alloy extruded tube. The heat-exchanged brazing material-coated Al or Al alloy extruded tube formed with any one of the brazing layers (a) to (d) reduces the erosion depth of the Al or Al alloy extruded tube after brazing. It can further excellent corrosion resistance of the fillet portion obtained by brazing, therefore, good heat exchanger corrosion resistance will be obtained, [C] the (a) ~
The research result obtained that any one of the brazing layers in (d) may be a flux brazing mixed layer obtained by further mixing a flux.
【0007】この発明は、上記の研究結果にもとづいて
なされたものであって、(1)AlまたはAl合金押出
チューブと、前記押出チューブの表面に形成されたZn
溶射層と、このZn溶射層の上に形成されたSi:15
超〜60重量%を含有し、残りがAlおよび不可避不純
物からなる組成の二元系過共晶Al合金ろう粉末を塗布
してなるろう塗布層とで構成されている熱交換器用ろう
材被覆AlまたはAl合金押出チューブ、(2)前記
(1)記載のろう塗布層は、Si:15超〜60重量%
を含有し、残りがAlおよび不可避不純物からなる組成
の二元系過共晶Al合金ろう粉末に、さらにフラックス
を混合してなるフラックスろう混合塗布層である熱交換
器用ろう材被覆AlまたはAl合金押出チューブ、
(3)AlまたはAl合金押出チューブと、前記押出チ
ューブの表面に形成されたZn溶射層と、このZn溶射
層の上に形成されたSi:15超〜60重量%、Zn:
1〜15重量%を含有し、残りがAlおよび不可避不純
物からなる組成の三元系過共晶Al合金ろう粉末を塗布
してなるろう塗布層とで構成されている熱交換器用ろう
材被覆AlまたはAl合金押出チューブ、(4)前記
(3)記載のろう塗布層は、Si:15超〜60重量
%、Zn:1〜15重量%を含有し、残りがAlおよび
不可避不純物からなる組成の三元系過共晶Al合金ろう
粉末に、さらにフラックスを混合してなるフラックスろ
う混合塗布層である熱交換器用ろう材被覆AlまたはA
l合金押出チューブ、(5)AlまたはAl合金押出チ
ューブと、前記押出チューブの表面に形成されたZn溶
射層と、このZn溶射層の上に形成されたSi:13〜
45重量%を含有し残りがAlおよび不可避不純物から
なる組成の二元系過共晶Al合金ろう粉末とSi粉末を
Si合計量が15超〜60重量%となるように混合した
混合粉末を塗布したろう塗布層とで構成されている熱交
換器用ろう材被覆AlまたはAl合金押出チューブ、
(6)前記(5)記載のろう塗布層は、Si:13〜4
5重量%を含有し残りがAlおよび不可避不純物からな
る組成の二元系過共晶Al合金ろう粉末とSi粉末をS
i合計量が15超〜60重量%となるように混合した混
合粉末に、さらにフラックスを混合してなるフラックス
ろう混合塗布層である熱交換器用ろう材被覆Alまたは
Al合金押出チューブ、(7)AlまたはAl合金押出
チューブと、前記押出チューブの表面に形成されたZn
溶射層と、このZn溶射層の上に形成されたSi:13
〜45重量%、Zn:5〜20重量%を含有し、残りが
Alおよび不可避不純物からなる組成の三元系過共晶A
l合金ろう粉末とSi粉末をSi合計量が15超〜60
重量%、Zn:1〜15重量%となるように混合した混
合粉末を塗布したろう塗布層とで構成されている熱交換
器用ろう材被覆AlまたはAl合金押出チューブ、
(8)前記(7)記載のろう塗布層は、Si:13〜4
5重量%、Zn:5〜20重量%を含有し、残りがAl
および不可避不純物からなる組成の三元系過共晶Al合
金ろう粉末とSi粉末をSi合計量が15超〜60重量
%、Zn:1〜15重量%となるように混合した混合粉
末に、さらにフラックスを混合してなるフラックスろう
混合塗布層である熱交換器用ろう材被覆AlまたはAl
合金押出チューブ、に特徴を有するものである。The present invention has been made on the basis of the above research results. (1) An Al or Al alloy extruded tube, and a Zn formed on the surface of the extruded tube.
Thermal spray layer and Si: 15 formed on this Zn thermal spray layer
A brazing material coating Al for a heat exchanger, comprising: a super-eutectic Al alloy brazing powder having a composition containing ultra-up to 60% by weight, the balance being Al and unavoidable impurities. Or an Al alloy extruded tube; (2) the brazing coating layer according to the above (1), wherein Si: more than 15 to 60% by weight;
And a heat-exchanger brazing material coated Al or Al alloy which is a flux brazing mixed coating layer formed by further mixing a flux with a binary hypereutectic Al alloy brazing powder having a composition consisting of Al and unavoidable impurities. Extrusion tube,
(3) Al or Al alloy extruded tube, Zn sprayed layer formed on the surface of the extruded tube, Si formed on this Zn sprayed layer: more than 15 to 60% by weight, Zn:
A brazing material coating Al for a heat exchanger, comprising a ternary hypereutectic Al alloy brazing powder containing 1 to 15% by weight and a balance of Al and unavoidable impurities. Or an Al alloy extruded tube, (4) the braze coating layer according to the above (3), containing Si: more than 15 to 60% by weight and Zn: 1 to 15% by weight, with the balance being Al and unavoidable impurities. Al or A, which is a flux brazing mixture coating layer formed by mixing a flux with ternary hypereutectic Al alloy brazing powder, for a heat exchanger.
1 alloy extruded tube, (5) Al or Al alloy extruded tube, Zn sprayed layer formed on the surface of the extruded tube, and Si formed on the Zn sprayed layer: 13 to
A mixed powder obtained by mixing a binary hypereutectic Al alloy brazing powder having a composition of 45% by weight with the balance consisting of Al and inevitable impurities and Si powder so that the total amount of Si is more than 15 to 60% by weight. A brazing material-coated Al or Al alloy extruded tube for a heat exchanger, comprising:
(6) The brazing coating layer according to the above (5), wherein Si: 13 to 4
Binary hypereutectic Al alloy brazing powder and Si powder containing 5% by weight and the balance consisting of Al and inevitable impurities
(i) an Al or Al alloy extruded tube coated with a brazing material for a heat exchanger, which is a flux brazing mixed coating layer obtained by further mixing a mixed powder so as to have a total amount of more than 15 to 60% by weight; Al or Al alloy extruded tube and Zn formed on the surface of the extruded tube
Sprayed layer and Si: 13 formed on the Zn sprayed layer
Ternary hypereutectic A having a composition of -45% by weight and Zn: 5-20% by weight, with the balance consisting of Al and unavoidable impurities
1 The total amount of the alloy brazing powder and the Si powder is more than 15 to 60.
Weight percent, Zn: a brazing material-coated Al or Al alloy extruded tube for a heat exchanger, comprising: a brazing layer coated with a mixed powder mixed to be 1 to 15% by weight;
(8) The solder coating layer according to the above (7), wherein Si: 13 to 4
5% by weight, Zn: 5-20% by weight, with the balance being Al
And a mixed powder obtained by mixing a ternary hypereutectic Al alloy brazing powder having a composition of unavoidable impurities and Si powder so that the total amount of Si is more than 15 to 60% by weight and Zn: 1 to 15% by weight. Al or Al coated with brazing material for heat exchanger, which is a flux brazing mixed coating layer formed by mixing flux
Alloy extruded tube.
【0008】さらに、この発明は、前記(1)、
(2)、(3)、(4)、(5)、(6)、(7)また
は(8)記載のろう材被覆AlまたはAl合金押出チュ
ーブを用いて作製された熱交換器に特徴を有するもので
ある。Further, the present invention provides the above (1),
(2), (3), (4), (5), (6), (7) or (8), characterized in that the heat exchanger manufactured using the brazing material-coated Al or Al alloy extruded tube. Have
【0009】前記(1)〜(8)記載のZn溶射層の上
に形成されたろう塗布層は、ろう材粉末またはろう材粉
末とフラックスの混合物をバインダ樹脂および溶剤と共
に混合してスラリー状にして塗布することにより形成す
ることもできる。The brazing coating layer formed on the Zn sprayed layer according to the above (1) to (8) is formed by mixing a brazing powder or a mixture of the brazing powder and a flux together with a binder resin and a solvent to form a slurry. It can also be formed by coating.
【0010】この発明の熱交換器用ろう材被覆Alまた
はAl合金押出チューブを図面に基づいて説明する。図
1は、この発明の熱交換器用ろう材被覆AlまたはAl
合金押出チューブの斜視図であり、1はこの発明の熱交
換器用ろう材被覆AlまたはAl合金押出チューブ、2
はろう塗布層、22はフラックスろう塗布層、3は断面
偏平状のAlまたはAl合金押出チューブであり、断面
偏平状のAlまたはAl合金押出チューブ3には複数の
穴4が設けられている。この発明の熱交換器用ろう材被
覆AlまたはAl合金押出チューブの表面にはZn溶射
層6が形成されており、ろう塗布層2またはフラックス
ろう塗布層22はZn溶射層6の上に形成されている。A description will be given of a brazing material coated Al or Al alloy extruded tube for a heat exchanger according to the present invention with reference to the drawings. FIG. 1 is a cross-sectional view of a brazing material coating Al or Al
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an alloy extruded tube.
A brazing coating layer, 22 is a flux brazing layer, 3 is an Al or Al alloy extrusion tube having a flat cross section, and a plurality of holes 4 are provided in the Al or Al alloy extrusion tube 3 having a flat cross section. A Zn-sprayed layer 6 is formed on the surface of an Al or Al-alloy extruded tube coated with a brazing material for a heat exchanger according to the present invention, and a brazing layer 2 or a flux brazing layer 22 is formed on the Zn-sprayed layer 6. I have.
【0011】ろう塗布層2は、(a)Si:15超〜6
0重量%を含有し、残りがAlおよび不可避不純物から
なる組成の二元系過共晶Al合金ろう粉末、(b)S
i:15超〜60重量%、Zn:1〜15重量%を含有
し、残りがAlおよび不可避不純物からなる組成の三元
系過共晶Al合金ろう粉末、(c)Si:13〜45重
量%を含有し残りがAlおよび不可避不純物からなる組
成の二元系過共晶Al合金ろう粉末とSi粉末をSi合
計量が15超〜60重量%となるように混合した混合粉
末、または(d)Si:13〜45重量%、Zn:5〜
20重量%を含有し、残りがAlおよび不可避不純物か
らなる組成の三元系過共晶Al合金ろう粉末とSi粉末
をSi合計量が15超〜60重量%、Zn:1〜15重
量%となるように混合した混合粉末の内のいずれかを塗
布して得られた層である。The brazing coating layer 2 comprises (a) Si: more than 15 to 6
Binary hypereutectic Al alloy brazing powder having a composition of 0% by weight and the balance consisting of Al and unavoidable impurities, (b) S
i: a ternary hypereutectic Al alloy brazing powder having a composition of more than 15 to 60% by weight, Zn: 1 to 15% by weight, and the balance consisting of Al and unavoidable impurities, (c) Si: 13 to 45% by weight Or (d) a mixed powder obtained by mixing a binary hypereutectic Al alloy brazing powder having a composition containing Al and unavoidable impurities and Si powder so that the total amount of Si is more than 15 to 60% by weight; or ) Si: 13 to 45% by weight, Zn: 5 to 5%
A ternary hypereutectic Al alloy brazing powder and a Si powder containing 20% by weight and the balance consisting of Al and inevitable impurities have a total amount of Si of more than 15 to 60% by weight and Zn: 1 to 15% by weight. This is a layer obtained by applying any one of the mixed powders mixed so as to form a layer.
【0012】さらに、フラックスろう塗布層22は、前
記(a)の二元系過共晶Al合金ろう粉末、(b)の三
元系過共晶Al合金ろう粉末、(c)の二元系過共晶A
l合金ろう粉末とSi粉末をSi合計量が15超〜60
重量%となるように混合した混合粉末、または(d)の
三元系過共晶Al合金ろう粉末とSi粉末をSi合計量
が15超〜60重量%、Zn:1〜15重量%となるよ
うに混合した混合粉末に、それぞれフラックスを混合し
た混合物を塗布して得られた層である。Further, the flux brazing coating layer 22 comprises the binary hypereutectic Al alloy brazing powder (a), the ternary hypereutectic Al alloy brazing powder (b), and the binary brazing powder (c). Hypereutectic A
1 The total amount of the alloy brazing powder and the Si powder is more than 15 to 60.
% Of the mixed powder, or the ternary hypereutectic Al alloy brazing powder and the Si powder of (d) with a total amount of Si of more than 15 to 60% by weight and Zn: 1 to 15% by weight. This is a layer obtained by applying a mixture obtained by mixing a flux to the mixed powder mixed as described above.
【0013】この発明の熱交換器用ろう材被覆Alまた
はAl合金押出チューブの構成を前記のごとく限定した
理由を説明する。The reason why the configuration of the brazing material-coated Al or Al alloy extruded tube for a heat exchanger of the present invention is limited as described above will be described.
【0014】Zn溶射層:AlまたはAl合金押出チュ
ーブにSi共晶点よりも多くSiを含む過共晶合金粉末
を直接塗布したろう材被覆AlまたはAl合金押出チュ
ーブは、Siがろうとなってフィレットを形成する前に
母材であるAlまたはAl合金押出チューブを厚さ方向
へ侵食し、母材厚さが極端に薄いとチューブに侵食によ
る貫通孔が発生することがある。ところが、Zn溶射層
を形成したこの発明の熱交換器用ろう材被覆Alまたは
Al合金押出チューブはZn溶射層が形成されているの
で侵食による貫通孔発生を防止する作用があり、さらに
耐食性も向上する。このZn溶射層の溶射量(以下、Z
n溶射量という)は3〜20g/m2 (好ましくは、7
〜15g/m2 )の範囲内にあることが好ましい。その
理由は、Zn溶射量が3g/m2 未満では被覆層の表面
Zn濃度が少なくて所望の作用が得られず、一方、Zn
溶射量が20g/m2 を越えるとろう付け後に被覆層の
Znが多量にフィレットに移動するため、フィレットが
優先的に腐食されてフィンとチューブが剥離したり、被
覆層のZn濃度が高くなり腐食量(速度)が著しく増加
するため好ましくないことによるものである。Zn-sprayed layer: An Al or Al alloy extruded tube in which a hypereutectic alloy powder containing more Si than the Si eutectic point is directly applied to an Al or Al alloy extruded tube, the Si or Al alloy extruded tube is filled with Si. Before forming the base material, the extruded tube of Al or Al alloy as the base material is eroded in the thickness direction. If the base material thickness is extremely thin, a through hole may be generated in the tube due to erosion. However, the heat-exchanged brazing material-coated Al or Al alloy extruded tube of the present invention having a Zn sprayed layer has an action of preventing through-hole generation due to erosion since the Zn sprayed layer is formed, and further improves corrosion resistance. . The spray amount of this Zn spray layer (hereinafter, Z
n spray amount) is 3 to 20 g / m 2 (preferably 7 g / m 2 ).
1515 g / m 2 ). The reason is that if the Zn spray amount is less than 3 g / m 2 , the desired effect cannot be obtained due to the low surface Zn concentration of the coating layer,
If the spray amount exceeds 20 g / m 2 , a large amount of Zn in the coating layer moves to the fillet after brazing, so that the fillet is preferentially corroded, the fins and the tube are separated, or the Zn concentration in the coating layer increases. This is because the amount of corrosion (rate) is undesirably increased because it increases significantly.
【0015】Al−Si二元系過共晶合金粉末:この発
明の熱交換器用ろう材被覆AlまたはAl合金押出チュ
ーブに塗布されるAl−Si二元系過共晶合金粉末のS
i含有量が15超〜60%の範囲内にあるAl−Si二
元系過共晶合金粉末であると、共晶あるいは過共晶とな
って母材に対する侵蝕が過度になることなく十分に母材
を溶解させることができる。この発明のAlまたはAl
合金ろう付け用混合粉末に含まれるAl−Si二元系過
共晶合金粉末のSi含有量は20〜45%の範囲である
ことが一層好ましく、25〜35%の範囲であることが
さらに一層好ましい。。Al-Si binary hypereutectic alloy powder: S of Al-Si binary hypereutectic alloy powder applied to a brazing material-coated Al or Al alloy extruded tube for a heat exchanger of the present invention.
If the Al-Si binary hypereutectic alloy powder has an i content in the range of more than 15 to 60%, the powder becomes sufficiently eutectic or hypereutectic without excessive corrosion of the base material. The base material can be dissolved. Al or Al of the present invention
The Si content of the Al-Si binary hypereutectic alloy powder contained in the alloy brazing powder is more preferably in the range of 20 to 45%, and even more preferably in the range of 25 to 35%. preferable. .
【0016】Al−Si二元系過共晶合金粉末に対する
Si粉末の配合量:この発明の熱交換器用ろう材被覆A
lまたはAl合金押出チューブに塗布されるAlまたは
Al合金ろう付け用混合粉末は、Si粉末が、前記Al
−Si二元系過共晶合金粉末に対してSiの合計量が1
5超〜60%となるように混合されることが好ましく、
Si粉末がAl−Si二元系過共晶合金粉末に対してS
i量の合計で15%以下となるように混合した混合粉末
からなるろう材では母材を溶解させる作用が十分得られ
ず、さらにろう材使用量が多くなるので好ましくない。
一方、Si量が合計で60%を越えて含有する混合粉末
からなるろう材では母材に対する侵蝕が過度になりす
ぎ、強度低下の原因になって好ましくない。したがっ
て、この発明のAlまたはAl合金ろう付け用混合粉末
はSi粉末をAl−Si二元系過共晶合金粉末に対して
Siの合計量が15超〜60%となるように定めた。S
i粉末の混合量は、Si量の合計で20〜45%の範囲
となるように混合することが一層好ましく、25〜35
%の範囲であることがさらに一層好ましい。Si粉末を
混合する時に使用するAl−Si二元系過共晶合金粉末
は、Si:13〜45重量%を含有し残りがAlおよび
不可避不純物からなる組成の二元系過共晶Al合金ろう
粉末であることが好ましい。Compounding amount of Si powder to Al-Si binary hypereutectic alloy powder: brazing material coating A for heat exchanger of the present invention
The Al or Al alloy brazing mixed powder applied to the l or Al alloy extruded tube is a Si powder,
-The total amount of Si is 1 with respect to the binary Si hypereutectic alloy powder.
Preferably, it is mixed so as to be more than 5 to 60%,
Si powder is S-based with Al-Si binary hypereutectic alloy powder
A brazing filler metal made of a mixed powder mixed so that the total amount of i becomes 15% or less is not preferable because the effect of dissolving the base metal cannot be sufficiently obtained and the amount of the brazing filler metal used increases.
On the other hand, if the brazing material is made of a mixed powder containing a total amount of Si exceeding 60%, the base material is excessively corroded, which is not preferable because it causes a reduction in strength. Accordingly, the Al or Al alloy brazing mixed powder of the present invention was determined so that the total amount of Si was more than 15 to 60% with respect to the Al-Si binary hypereutectic alloy powder. S
The mixing amount of the i powder is more preferably in the range of 20 to 45% in total of the Si amount, and more preferably 25 to 35%.
% Is even more preferred. The Al-Si binary hypereutectic alloy powder used when mixing the Si powder is a binary hypereutectic Al alloy solder having a composition containing 13 to 45% by weight of Si and the balance of Al and unavoidable impurities. It is preferably a powder.
【0017】Al−Si−Zn三元系過共晶合金粉末:
この発明の熱交換器用ろう材被覆AlまたはAl合金押
出チューブに塗布されるAl−Si−Zn三元系合金粉
末がSi:15%以下の亜共晶〜共晶の場合、使用する
粉末の量が多くなるので好ましくなく、従って、Si:
15%超の過共晶のAl−Si−Zn三元系合金粉末を
使用する必要があり、Si含有量が15超〜60%、Z
n含有量が1〜15%の範囲内にあるAl−Si−Zn
三元系過共晶合金粉末を使用する必要がある。前記Al
−Si−Zn三元系過共晶合金粉末のSi含有量は20
〜40%、Zn含有量は5〜10%の範囲であることが
一層好ましい。Al-Si-Zn ternary hypereutectic alloy powder:
When the Al-Si-Zn ternary alloy powder applied to the brazing material-coated Al or Al alloy extruded tube for a heat exchanger of the present invention is Si: hypoeutectic to eutectic of 15% or less, the amount of the powder used Is unfavorable because of the increase in
It is necessary to use a hypereutectic Al-Si-Zn ternary alloy powder having a Si content of more than 15 to 60% and a Z of more than 15%.
Al-Si-Zn with n content in the range of 1 to 15%
It is necessary to use ternary hypereutectic alloy powder. The Al
-Si-Zn ternary hypereutectic alloy powder has a Si content of 20
More preferably, the Zn content is in the range of 5 to 10%.
【0018】Al−Si−Zn三元系過共晶合金粉末に
対するSi粉末の配合量:この発明の熱交換器用ろう材
被覆AlまたはAl合金押出チューブに塗布されるAl
−Si−Zn三元系過共晶合金粉末に混合されるSi粉
末は、混合粉末のSi合計量が15%超〜60%となる
ように添加混合されることが好ましく、Si粉末がAl
−Si−Zn三元系過共晶合金粉末に対してSi合計量
で15%以下となるように含有した混合粉末ろう材では
母材を溶解させる作用が十分得られないために混合粉末
ろう材の使用量が多くなって好ましくない。一方、Si
量が合計で60%を越えて含有するように混合した混合
粉末からなるろう材では母材であるチューブに対する侵
食が過度になり、強度低下の原因になって好ましくな
い。したがって、この発明のAlまたはAl合金ろう付
け用混合粉末は、Si粉末をAl−Si−Zn三元系過
共晶合金粉末に対してSiの合計量が15%超〜60%
となるように混合するようにした。Si粉末は、Si量
の合計で20〜45%の範囲にあるように混合すること
が一層好ましい。またSi粉末を混合して得られたAl
またはAl合金ろう付け用混合粉末に含まれるZn量の
合計は1〜15%の範囲とすることで、ろう付け後に接
合部やろう材粉末塗布部に部材表面から深部へZn濃度
勾配を持つZn拡散層が形成され、このZn拡散層によ
り腐食形態が面状型となり、深さ方向への腐食を防止す
ることができ、従って、耐孔食性などの耐食性を向上さ
せることができる。この場合、Zn量の合計が15%を
越えると腐食速度が速くなり、腐食が著しくなるので好
ましくない。AlまたはAl合金ろう付け用混合粉末に
含まれるZn量は合計で5〜10%の範囲にあることが
一層好ましい。Si粉末を混合する時に使用するAl−
Si−Zn三元系過共晶合金粉末のSiは13〜45重
量%、Znは5〜20重量%を含有し、残りがAlおよ
び不可避不純物からなる組成の三元系過共晶Al合金ろ
う粉末であることが好ましい。Compounding amount of Si powder to Al-Si-Zn ternary hypereutectic alloy powder: Al applied to brazing material-coated Al or Al alloy extruded tube for heat exchanger of the present invention
-Si-Zn The Si powder mixed with the ternary hypereutectic alloy powder is preferably added and mixed such that the total amount of Si in the mixed powder is more than 15% to 60%.
A mixed powder brazing material containing 15% or less of the total amount of Si with respect to the -Si-Zn ternary hypereutectic alloy powder cannot sufficiently obtain the effect of dissolving the base material, so the mixed powder brazing material Is undesirably increased. On the other hand, Si
A brazing filler metal made of a mixed powder containing more than 60% of the total amount undesirably causes excessive erosion of the tube serving as a base material and causes a reduction in strength. Therefore, in the mixed powder for brazing Al or Al alloy of the present invention, the total amount of Si is more than 15% to 60% with respect to the Al-Si-Zn ternary hypereutectic alloy powder.
It was made to mix so that it might become. The Si powder is more preferably mixed so that the total amount of Si is in the range of 20 to 45%. Al obtained by mixing Si powder
Alternatively, by setting the total amount of Zn contained in the Al alloy brazing mixed powder to be in the range of 1 to 15%, Zn having a Zn concentration gradient from the member surface to the deep portion in the joining portion or the brazing powder application portion after brazing. A diffusion layer is formed, and the Zn diffusion layer forms a corrosion type in a planar shape, so that corrosion in the depth direction can be prevented, and therefore, corrosion resistance such as pitting corrosion resistance can be improved. In this case, if the total amount of Zn exceeds 15%, the corrosion rate is increased, and the corrosion becomes remarkable. More preferably, the total amount of Zn contained in the Al or Al alloy brazing mixed powder is in the range of 5 to 10%. Al- used when mixing Si powder
In the Si-Zn ternary hypereutectic alloy powder, Si contains 13 to 45% by weight, Zn contains 5 to 20% by weight, and the balance is a ternary hypereutectic Al alloy braze composed of Al and unavoidable impurities. It is preferably a powder.
【0019】Al−Si二元系過共晶合金粉末、Al−
Si−Zn三元系過共晶合金粉末およびSi粉末の平均
粒径:この発明の熱交換器ろう材被覆AlまたはAl合
金押出チューブで使用するAl−Si二元系過共晶合金
粉末、Al−Si−Zn三元系過共晶合金粉末およびS
i粉末の平均粒径は、Si粉末がAl−Si二元系過共
晶合金粉末およびAl−Si−Zn三元系過共晶合金粉
末よりも融点が高いところから、Si粉末の粒径をAl
−Si二元系過共晶合金粉末およびAl−Si−Zn三
元系過共晶合金粉末の粒径よりも微細にし、Alまたは
Al合金ろう付け用混合粉末中に均一に分散させると共
にSi粉末による局部侵蝕を低減し、母材表面の侵蝕を
穏やかにする必要がある。したがって、この発明のAl
またはAl合金ろう付け用混合粉末は、Al−Si二元
系過共晶合金粉末およびAl−Si−Zn三元系過共晶
合金粉末の平均粒径を5〜100μmの範囲内にする必
要があり、一方、Si粉末の平均粒径は1〜50μmの
範囲内にあり、かつAl−Si二元系過共晶合金粉末お
よびAl−Si−Zn三元系過共晶合金粉末の平均粒径
はSi粉末の平均粒径よりも相対的に大きい平均粒径を
有することが好ましい。この発明のAlまたはAl合金
ろう付け用混合粉末に含まれるAl−Si二元系過共晶
合金粉末およびAl−Si−Zn三元系過共晶合金粉末
の平均粒径は10〜70μmの範囲内にあり、Si粉末
の平均粒径は1〜30μmの範囲内にあり、かつAl−
Si二元系過共晶合金粉末およびAl−Si−Zn三元
系過共晶合金粉末の平均粒径はSi粉末の平均粒径より
も相対的に大きい平均粒径を有することが一層好まし
い。さらに一層好ましい範囲はAl−Si二元系過共晶
合金粉末および、Al−Si−Zn三元系過共晶合金粉
末の平均粒径が15〜40μmの範囲内にあり、Si粉
末の平均粒径は1〜20μmの範囲内にありかつAl−
Si二元系過共晶合金粉末およびAl−Si−Zn三元
系過共晶合金粉末の平均粒径はSi粉末の平均粒径より
も相対的に大きい平均粒径を有することである。Al-Si binary hypereutectic alloy powder, Al-
Average particle size of Si-Zn ternary hypereutectic alloy powder and Si powder: Al-Si binary hypereutectic alloy powder used in heat exchanger brazing material coated Al or Al alloy extruded tube of the present invention, Al -Si-Zn ternary hypereutectic alloy powder and S
The average particle diameter of the i-powder is higher than that of the Al-Si binary hypereutectic alloy powder and the Al-Si-Zn ternary hypereutectic alloy powder. Al
-Finer than the particle diameter of the binary hypereutectic alloy powder of Si and the ternary hypereutectic alloy powder of Al-Si-Zn, and uniformly dispersed in the Al or Al alloy brazing mixed powder and Si powder Therefore, it is necessary to reduce local erosion due to erosion and to moderate erosion of the base material surface. Therefore, the Al of the present invention
Alternatively, the Al alloy brazing mixed powder needs to have an average particle diameter of the Al-Si binary hypereutectic alloy powder and the Al-Si-Zn ternary hypereutectic alloy powder within the range of 5 to 100 µm. On the other hand, the average particle size of Si powder is in the range of 1 to 50 μm, and the average particle size of Al-Si binary hypereutectic alloy powder and Al-Si-Zn ternary hypereutectic alloy powder Preferably has an average particle size relatively larger than the average particle size of the Si powder. The average particle diameter of the Al-Si binary hypereutectic alloy powder and the Al-Si-Zn ternary hypereutectic alloy powder contained in the Al or Al alloy brazing mixed powder of the present invention is in the range of 10 to 70 µm. , The average particle diameter of the Si powder is in the range of 1 to 30 μm, and
More preferably, the average particle diameter of the Si binary hypereutectic alloy powder and the Al-Si-Zn ternary hypereutectic alloy powder has an average particle diameter relatively larger than the average particle diameter of the Si powder. An even more preferred range is that the average particle size of the Al-Si binary hypereutectic alloy powder and the Al-Si-Zn ternary hypereutectic alloy powder is in the range of 15 to 40 µm, The diameter is in the range of 1-20 μm and the Al-
The average particle diameter of the Si binary hypereutectic alloy powder and the Al-Si-Zn ternary hypereutectic alloy powder is to have an average particle diameter relatively larger than the average particle diameter of the Si powder.
【0020】[0020]
【発明の実施の形態】JIS A3003のAl合金イ
ンゴットを押出し加工することにより押出チューブを成
形し、さらに、成形直後の押出Al合金チューブにZn
を溶射することにより表面にいずれもZn溶射量10g
/m2 のZn溶射層を有するZn被覆Al合金チューブ
を作製した。さらに、チューブを通すことのできる開口
を設けたJIS A3003からなるヘッダー部および
波形に成形されたJIS A3003からなるフィンを
用意した。BEST MODE FOR CARRYING OUT THE INVENTION An extruded tube is formed by extruding an Al alloy ingot of JIS A3003.
Spray Zn on the surface by spraying 10 g
A Zn-coated Al alloy tube having a / m 2 Zn sprayed layer was produced. Further, a header portion made of JIS A3003 provided with an opening through which a tube can be passed and a fin made of JIS A3003 formed into a corrugated shape were prepared.
【0021】実施例1 Al合金製溶湯をアトマイズして得られた表1に示され
る成分組成を有する平均粒径:30μmのAl−Si二
元系合金粉末:10重量部に対してフラックス:1重量
部、バインダー:1重量部の割合で混合し、スラリー状
ろう材を作製した。前記Zn被覆Al合金チューブにこ
れらスラリー状ろう材を塗布することにより本発明熱交
換器用ろう材被覆Al合金押出チューブ(以下、本発明
チューブという)1〜7および比較熱交換器用ろう材被
覆Al合金押出チューブ(以下、比較チューブという)
1を作製した。さらにZn溶射しない押出チューブに表
1に示される組成のAl−Si二元系合金粉末を含むス
ラリー状ろう材を塗布することにより従来熱交換器用ろ
う材被覆Al合金押出チューブ(以下、従来チューブと
いう)1を作製した。Example 1 Al-Si binary alloy powder having an average particle diameter of 30 μm and having a component composition shown in Table 1 obtained by atomizing a molten alloy made of Al alloy and having a flux of 1 to 10 parts by weight. Parts by weight and a binder were mixed at a ratio of 1 part by weight to prepare a slurry brazing material. By applying these slurry-like brazing materials to the Zn-coated Al alloy tubes, the brazing material-coated Al alloy extruded tubes for heat exchangers of the present invention (hereinafter referred to as the tubes of the present invention) 1 to 7 and the brazing material-coated Al alloys for comparative heat exchangers Extruded tube (hereinafter referred to as comparative tube)
1 was produced. Furthermore, a slurry-form brazing material containing Al-Si binary alloy powder having the composition shown in Table 1 is applied to an extruded tube that is not sprayed with Zn to thereby form a conventional brazing material-coated Al alloy extruded tube for a heat exchanger (hereinafter referred to as a conventional tube). 1) was produced.
【0022】前記本発明チューブ1〜7、比較チューブ
1および従来チューブ1を前記ヘッダー部の開口に挿入
して熱交換器の枠を作製し、さらに波形に成形されたフ
ィンをチューブとチューブの間に設置してヘッダー部、
チューブおよびフィンからなる組立体を作製した。得ら
れた組立体を加熱炉に装入し不活性ガス雰囲気下で60
0℃に保持された加熱炉に5分間保持することにより加
熱し、ヘッダー部5、チューブ1およびフィン7をフィ
レット8を介して接合した図2の熱交換器の一部側面図
に示される熱交換器を作製した。The tubes 1 to 7 of the present invention, the comparative tube 1 and the conventional tube 1 are inserted into the opening of the header portion to form a heat exchanger frame, and the corrugated fins are inserted between the tubes. Installed in the header,
An assembly consisting of a tube and fins was made. The obtained assembly was charged into a heating furnace, and heated under an inert gas atmosphere.
Heating was performed by maintaining the heating unit in a heating furnace maintained at 0 ° C. for 5 minutes, and the heat shown in a partial side view of the heat exchanger of FIG. An exchanger was made.
【0023】得られた熱交換器のチューブ1とフィン7
を完全に接合した場合の接合部全長(L)に対するこの
実施例でろう付けして得られた熱交換器のチューブ1と
フィン7の接合部長さ(l)の比を接合率(l/L×1
00%)として測定し、さらにフィン間部9(図2にお
けるフィレット8とフィレット8の間のチューブ部分)
におけるろう付け前のチューブの厚さとろう付け後のチ
ューブの厚さの差を侵食深さとして測定し、その結果を
表1に示し、ろう付け性を評価した(表1において、○
は総合的に判断してろう付け性良好、×は総合的に判断
してろう付け性不良を示す)。The tubes 1 and the fins 7 of the obtained heat exchanger
The ratio of the joint length (l) of the tube 1 and the fin 7 of the heat exchanger obtained by brazing in this embodiment to the joint length (L) when the joints are completely joined is determined by the joining ratio (l / L). × 1
00%) and further between the fins 9 (the tube portion between the fillets 8 in FIG. 2).
The difference between the thickness of the tube before brazing and the thickness of the tube after brazing was measured as the erosion depth, and the results are shown in Table 1, and the brazing properties were evaluated (in Table 1, ○
Indicates that the brazing property is good when judged comprehensively, and X indicates that the brazing property is poor when judged comprehensively.)
【0024】さらに、本発明チューブ1〜7、比較チュ
ーブ1および従来チューブ1を用いてろう付けして得ら
れた熱交換器を、人口海水および酢酸からなる試験液を
50℃の温度下で30分間噴霧した後、30分間噴霧を
停止して湿潤雰囲気下に保持時する操作を20日間繰り
返すSWAAT試験を行い、フィン間部9の腐食形態を
調査し、さらに腐食深さを測定し、その結果を表1に示
し、耐食性を評価した(表1において、○は総合的に判
断して耐食性良好、×は総合的に判断して耐食性不良を
示す)。なお、侵食深さおよび腐食深さの測定、並びに
腐食形態の調査にフィン間部9を選んだ理由は、フィン
間部9に侵食および孔食が発生するとそれによって熱交
換器の冷媒漏れが発生し、重大な事態を引き起こすから
である。Further, the heat exchanger obtained by brazing using the tubes 1 to 7 of the present invention, the comparative tube 1 and the conventional tube 1 was subjected to a test solution consisting of artificial seawater and acetic acid at 50 ° C. for 30 minutes. After spraying for 30 minutes, the operation of stopping spraying for 30 minutes and maintaining the sample in a humid atmosphere is repeated for 20 days. A SWAAT test is performed, the corrosion form of the fin portion 9 is investigated, and the corrosion depth is measured. Are shown in Table 1 and the corrosion resistance was evaluated (in Table 1, は indicates that the corrosion resistance was good when judged comprehensively, and X indicates that the corrosion resistance was bad when judged comprehensively). The reason why the inter-fin portion 9 was selected for the measurement of the erosion depth and the corrosion depth and for the investigation of the corrosion form is that when erosion and pitting occur in the inter-fin portion 9, refrigerant leakage of the heat exchanger occurs. And cause a serious situation.
【0025】[0025]
【表1】 [Table 1]
【0026】実施例2 Al合金製溶湯をアトマイズして得られた表2に示され
る成分組成を有する平均粒径:30μmのAl−Si−
Zn三元系合金粉末:10重量部に対してフラックス:
1重量部、バインダー:1重量部の割合で混合し、スラ
リー状ろう材を作製した。前記Zn被覆Al合金チュー
ブにこれらスラリー状ろう材を塗布することにより本発
明チューブ8〜14および比較チューブ2を作製した。
さらにZn溶射しない押出チューブに表2に示される組
成のスラリー状ろう材を塗布することにより従来チュー
ブ2を作製した。Example 2 Al—Si— having an average particle diameter of 30 μm and having a component composition shown in Table 2 obtained by atomizing a molten aluminum alloy.
Zn ternary alloy powder: flux with respect to 10 parts by weight:
One part by weight and a binder were mixed at a ratio of 1 part by weight to prepare a slurry brazing material. The tubes 8 to 14 of the present invention and the comparative tube 2 were prepared by applying the slurry-like brazing material to the Zn-coated Al alloy tube.
Further, a conventional tube 2 was prepared by applying a slurry-like brazing material having the composition shown in Table 2 to an extruded tube that was not sprayed with Zn.
【0027】前記本発明チューブ8〜14、比較チュー
ブ2および従来チューブ2を前記ヘッダー部の開口に挿
入して熱交換器の枠を作製し、さらに波形に成形された
フィンをチューブとチューブの間に設置してヘッダー
部、チューブおよびフィンからなる組立体を作製した。
得られた組立体を加熱炉に装入し不活性ガス雰囲気下で
600℃に保持された加熱炉に5分間保持することによ
り加熱し、ヘッダー部5、チューブ1およびフィン7を
フィレット8を介して接合した図2の熱交換器の一部側
面図に示されるごとき熱交換器を作製した。The tubes 8 to 14 of the present invention, the comparative tube 2 and the conventional tube 2 are inserted into the opening of the header portion to form a heat exchanger frame, and the corrugated fins are inserted between the tubes. And an assembly composed of a header portion, a tube, and a fin was manufactured.
The obtained assembly is charged into a heating furnace, and heated in a heating furnace maintained at 600 ° C. for 5 minutes under an inert gas atmosphere to heat the header section 5, the tube 1, and the fin 7 via the fillet 8. A heat exchanger as shown in the partial side view of the heat exchanger of FIG.
【0028】得られた熱交換器のチューブ1とフィン7
を完全に接合した場合の接合部全長(L)に対するこの
実施例でろう付けして得られた熱交換器のチューブ1と
フィン7の接合部長さ(l)の比を接合率(l/L×1
00%)として測定し、さらにフィン間部9におけるろ
う付け前のチューブの厚さとろう付け後のチューブの厚
さの差を侵食深さとして測定し、その結果を表2に示
し、ろう付け性を評価した(表2において、○は総合的
に判断してろう付け性良好、×は総合的に判断してろう
付け性不良を示す)。Tube 1 and fin 7 of the obtained heat exchanger
The ratio of the joint length (l) of the tube 1 and the fin 7 of the heat exchanger obtained by brazing in this embodiment to the joint length (L) when the joints are completely joined is determined by the joining ratio (l / L). × 1
00%), and the difference between the thickness of the tube before brazing and the thickness of the tube after brazing in the inter-fin portion 9 was measured as the erosion depth. (In Table 2, ○ indicates good brazing property as judged comprehensively, and X indicates poor brazing property as judged comprehensively).
【0029】さらに、本発明チューブ8〜14、比較チ
ューブ2および従来チューブ2を用いてろう付けして得
られた熱交換器に付いて実施例1と同じSWAAT試験
を行い、フィン間部9の腐食形態を調査し、さらに腐食
深さを測定し、その結果を表2に示し、耐食性を評価し
た(表2において、○は総合的に判断して耐食性良好、
×は総合的に判断して耐食性不良を示す)。Further, the same SWAAT test as in Example 1 was performed on the heat exchangers obtained by brazing using the tubes 8 to 14 of the present invention, the comparative tube 2 and the conventional tube 2, and The corrosion mode was investigated, and the corrosion depth was measured. The results are shown in Table 2 and the corrosion resistance was evaluated.
× indicates poor corrosion resistance as judged comprehensively).
【0030】[0030]
【表2】 [Table 2]
【0031】実施例3 表3に示される成分組成を有し平均粒径:30μmのA
l−Si二元系合金粉末に純Si粉末を表3に示される
割合に配合し混合してSi量が合計で表3に示される値
となる混合粉末を作製し、これら混合粉末10重量部に
対してフラックス:1重量部、バインダー:1重量部の
割合で混合し、スラリー状ろう材を作製した。前記Zn
被覆Al合金チューブにこれらスラリー状ろう材を塗布
することにより本発明チューブ15〜22および比較チ
ューブ3を作製した。これら本発明チューブ15〜22
および比較チューブ3を用いて実施例1と同じ条件で接
合率(l/L×100%)を測定し、さらにフィン間部
9におけるろう付け前のチューブの厚さとろう付け後の
チューブの厚さの差を侵食深さとして測定し、その結果
を表3に示し、ろう付け性を評価した(表3において、
○は総合的に判断してろう付け性良好、×は総合的に判
断してろう付け性不良を示す)。さらに実施例1と同じ
SWAAT試験を行い、フィン間部9の腐食形態を調査
し、さらに腐食深さを測定し、その結果を表3に示し、
耐食性を評価した(表3において、○は総合的に判断し
て耐食性良好、×は総合的に判断して耐食性不良を示
す)。Example 3 A having the component composition shown in Table 3 and having an average particle size of 30 μm
Pure Si powder was blended with the l-Si binary alloy powder in the ratio shown in Table 3 and mixed to prepare a mixed powder having a total amount of Si shown in Table 3 and 10 parts by weight of the mixed powder. And a binder: 1 part by weight to obtain a slurry brazing material. The Zn
The tubes 15 to 22 of the present invention and the comparative tube 3 were prepared by applying these slurry-like brazing materials to the coated Al alloy tube. These tubes of the present invention 15 to 22
The joining rate (l / L × 100%) was measured under the same conditions as in Example 1 using the comparative tube 3 and the thickness of the tube before brazing and the thickness of the tube after brazing in the inter-fin portion 9. Was measured as the erosion depth, and the results are shown in Table 3, and the brazing property was evaluated (in Table 3,
は indicates good brazing properties as judged comprehensively, and x indicates poor brazing properties as judged comprehensively). Further, the same SWAAT test as in Example 1 was performed to investigate the form of corrosion of the fin portion 9, and the corrosion depth was measured. The results are shown in Table 3.
The corrosion resistance was evaluated (in Table 3, ○ indicates good corrosion resistance judged comprehensively, and X indicates poor corrosion resistance judged comprehensively).
【0032】[0032]
【表3】 [Table 3]
【0033】実施例4 表4に示される成分組成を有し平均粒径:30μmのA
l−Si−Zn三元系合金粉末に純Si粉末を表4に示
される割合に配合し混合してSi量が合計で表4に示さ
れる値となる混合粉末を作製し、これら混合粉末10重
量部に対してフラックス:1重量部、バインダー:1重
量部の割合で混合し、スラリー状ろう材を作製した。前
記Zn被覆Al合金チューブにこれらスラリー状ろう材
を塗布することにより本発明チューブ23〜30および
比較チューブ4を作製した。これら本発明チューブ23
〜30および比較チューブ4を用いて実施例2と同じ条
件で接合率(l/L×100%)を測定し、さらにフィ
ン間部9におけるろう付け前のチューブの厚さとろう付
け後のチューブの厚さの差を侵食深さとして測定し、そ
の結果を表4に示し、ろう付け性を評価した(表4にお
いて、○は総合的に判断してろう付け性良好、×は総合
的に判断してろう付け性不良を示す)。さらに実施例1
と同じSWAAT試験を行い、フィン間部9の腐食形態
を調査し、さらに腐食深さを測定し、その結果を表4に
示し、耐食性を評価した(表4において、○は総合的に
判断して耐食性良好、×は総合的に判断して耐食性不良
を示す)。Example 4 A having a component composition shown in Table 4 and having an average particle size of 30 μm
Pure Si powder was mixed with the l-Si-Zn ternary alloy powder in the ratio shown in Table 4 and mixed to prepare a mixed powder having a total amount of Si shown in Table 4, and these mixed powders 10 A flux: 1 part by weight and a binder: 1 part by weight were mixed with respect to parts by weight to prepare a slurry brazing material. The tubes 23 to 30 of the present invention and the comparative tube 4 were prepared by applying these slurry-like brazing materials to the Zn-coated Al alloy tube. These inventive tubes 23
30 and the comparative tube 4, the joining ratio (l / L × 100%) was measured under the same conditions as in Example 2, and the thickness of the tube before brazing and the tube after brazing in the fin inter-part 9 were further measured. The difference in thickness was measured as the erosion depth, and the results are shown in Table 4. The brazing property was evaluated (in Table 4, ○ indicates comprehensive judgment and good brazing property, and × indicates comprehensive judgment. Shows poor brazing properties). Example 1
The same SWAAT test was conducted to investigate the form of corrosion of the inter-fin portion 9, and further measured the corrosion depth. The results are shown in Table 4 and the corrosion resistance was evaluated (in Table 4, ○ indicates comprehensive judgment. × indicates poor corrosion resistance when judged comprehensively).
【0034】[0034]
【表4】 [Table 4]
【0035】[0035]
【発明の効果】表1〜4に示される結果から、本発明チ
ューブ1〜30で作製した熱交換器のろう材接合部は、
従来チューブ1および2で作製した熱交換器のろう材接
合部に比べて接合率が大きいところからろう付け性に優
れ、フィン間部の腐食形態も面状腐食となって腐食深さ
も浅いところから耐食性にすぐれており、本発明チュー
ブ1〜30を使用して作製した熱交換器は従来チューブ
1および2を使用して作製した熱交換器に比べて優れて
いることが分かる。しかし、この発明の範囲から外れた
比較チューブ1〜4(表1〜4において、この発明の条
件から外れている値に*印をつけて示した)で作製した
熱交換器は、比較チューブ1〜3のようにフィン間部に
おける侵食深さが大きくなったり、比較チューブ4のよ
うにフィン間部における腐食深さが大きくなるなどして
好ましくないことが分かる。According to the results shown in Tables 1 to 4, the brazing filler metal joints of the heat exchangers manufactured using the tubes 1 to 30 of the present invention are as follows.
The brazing property is excellent because the joining rate is larger than the brazing material joining part of the heat exchangers made with the conventional tubes 1 and 2, and the corrosion between the fins is also in the form of planar corrosion and the corrosion depth is shallow. It can be seen that the heat exchangers manufactured using the tubes 1 to 30 of the present invention are excellent in corrosion resistance and are superior to the heat exchangers manufactured using the conventional tubes 1 and 2. However, the heat exchangers manufactured with the comparative tubes 1 to 4 (in Tables 1 to 4, values that are out of the conditions of the present invention are marked with an asterisk) are out of the scope of the present invention. It can be seen that the erosion depth in the inter-fin portion becomes large as in Nos. 3 to 3, and the corrosion depth in the inter-fin portion becomes large as in the comparative tube 4, which is not preferable.
【0036】上述のように、この発明の熱交換器用ろう
材被覆AlまたはAl合金押出チューブは、耐食性に優
れたた熱交換器を提供することができ、工業上有用な効
果をもたらすものである。As described above, the Al or Al alloy extruded tube coated with a brazing filler metal for a heat exchanger according to the present invention can provide a heat exchanger excellent in corrosion resistance and has an industrially useful effect. .
【図1】この発明の熱交換器用ろう材被覆AlまたはA
l合金押出チューブの斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a brazing material coating Al or A for a heat exchanger of the present invention.
It is a perspective view of a 1 alloy extrusion tube.
【図2】ろう付けされたこの発明の熱交換器の一部側面
図である。FIG. 2 is a partial side view of the heat exchanger of the present invention brazed.
【図3】従来の熱交換器用ろう材被覆AlまたはAl合
金押出チューブの斜視図である。FIG. 3 is a perspective view of a conventional brazing material-coated Al or Al alloy extruded tube for a heat exchanger.
【図4】熱交換器組立体の斜視図である。FIG. 4 is a perspective view of a heat exchanger assembly.
1 この発明の熱交換器用ろう材被覆AlまたはAl合
金押出チューブ 1´ 従来の熱交換器用ろう材被覆AlまたはAl合金
押出チューブ 2 ろう塗布層 22 フラックスろう混合塗布層 2´ 従来のろう塗布層 3 チューブ 4 穴 5 ヘッダー部 6 Zn溶射層 7 フィン 8 フィレット 9 フィン間部REFERENCE SIGNS LIST 1 Extruded brazing material-coated Al or Al alloy tube for heat exchanger of present invention 1 'Extruded brazing material-coated Al or Al alloy tube for heat exchanger 2 2 Coating layer 22 Flux mixed coating layer 2' Conventional brazing layer 3 Tube 4 hole 5 header 6 Zn sprayed layer 7 fin 8 fillet 9 fin
フロントページの続き (51)Int.Cl.6 識別記号 FI C23C 4/08 C23C 4/08 28/02 28/02 Continued on the front page (51) Int.Cl. 6 Identification code FI C23C 4/08 C23C 4/08 28/02 28/02
Claims (9)
記押出チューブの表面に形成されたZn溶射層と、この
Zn溶射層の上に形成されたSi:15超〜60重量%
を含有し、残りがAlおよび不可避不純物からなる組成
の二元系過共晶Al合金ろう粉末を塗布してなるろう塗
布層とで構成されていることを特徴とする熱交換器用ろ
う材被覆AlまたはAl合金押出チューブ。1. An Al or Al alloy extruded tube, a Zn sprayed layer formed on the surface of the extruded tube, and Si formed on the Zn sprayed layer: more than 15 to 60% by weight
And a brazing coating layer formed by applying a binary hypereutectic Al alloy brazing powder having a composition consisting of Al and unavoidable impurities. Or an aluminum alloy extrusion tube.
5超〜60重量%を含有し、残りがAlおよび不可避不
純物からなる組成の二元系過共晶Al合金ろう粉末に、
さらにフラックスを混合してなるフラックスろう混合塗
布層であることを特徴とする熱交換器用ろう材被覆Al
またはAl合金押出チューブ。2. The brazing coating layer according to claim 1, wherein Si: 1
In a binary hypereutectic Al alloy brazing powder having a composition containing more than 5 to 60% by weight, the balance consisting of Al and inevitable impurities,
A flux brazing coating layer for heat exchanger, characterized by being a flux brazing mixed coating layer obtained by further mixing flux.
Or an aluminum alloy extrusion tube.
記押出チューブの表面に形成されたZn溶射層と、この
Zn溶射層の上に形成されたSi:15超〜60重量
%、Zn:1〜15重量%を含有し、残りがAlおよび
不可避不純物からなる組成の三元系過共晶Al合金ろう
粉末を塗布してなるろう塗布層とで構成されていること
を特徴とする熱交換器用ろう材被覆AlまたはAl合金
押出チューブ。3. An extruded Al or Al alloy tube, a sprayed Zn layer formed on the surface of the extruded tube, and Si formed on the sprayed Zn layer: more than 15 to 60% by weight, Zn: 1 to 60% by weight. A solder coating layer formed by applying a ternary hypereutectic Al alloy solder powder having a composition of 15% by weight and the balance consisting of Al and unavoidable impurities. Material coated Al or Al alloy extruded tube.
5超〜60重量%、Zn:1〜15重量%を含有し、残
りがAlおよび不可避不純物からなる組成の三元系過共
晶Al合金ろう粉末に、さらにフラックスを混合してな
るフラックスろう混合塗布層であることを特徴とする熱
交換器用ろう材被覆AlまたはAl合金押出チューブ。4. The brazing coating layer according to claim 3, wherein Si: 1
A flux brazing mixture obtained by further mixing a flux with a ternary hypereutectic Al alloy brazing powder having a composition of more than 5 to 60% by weight and Zn: 1 to 15% by weight, the balance being Al and unavoidable impurities. An aluminum or aluminum alloy extruded tube coated with a brazing filler metal for a heat exchanger, which is an application layer.
記押出チューブの表面に形成されたZn溶射層と、この
Zn溶射層の上に形成されたSi:13〜45重量%を
含有し残りがAlおよび不可避不純物からなる組成の二
元系過共晶Al合金ろう粉末とSi粉末をSi合計量が
15超〜60重量%となるように混合した混合粉末を塗
布したろう塗布層とで構成されていることを特徴とする
熱交換器用ろう材被覆AlまたはAl合金押出チュー
ブ。5. An Al or Al alloy extruded tube, a Zn sprayed layer formed on the surface of the extruded tube, and 13 to 45% by weight of Si formed on the Zn sprayed layer, with the balance being Al And a wax coating layer coated with a mixed powder obtained by mixing a binary hypereutectic Al alloy brazing powder having a composition of unavoidable impurities and a Si powder so that the total amount of Si is more than 15 to 60% by weight. An aluminum or aluminum alloy extruded tube coated with a brazing material for a heat exchanger.
3〜45重量%を含有し残りがAlおよび不可避不純物
からなる組成の二元系過共晶Al合金ろう粉末とSi粉
末をSi合計量が15超〜60重量%となるように混合
した混合粉末に、さらにフラックスを混合してなるフラ
ックスろう混合塗布層であることを特徴とする熱交換器
用ろう材被覆AlまたはAl合金押出チューブ。6. The brazing coating layer according to claim 5, wherein Si: 1
A mixed powder obtained by mixing a binary hypereutectic Al alloy brazing powder having a composition of 3 to 45% by weight with the balance being Al and inevitable impurities and Si powder so that the total amount of Si is more than 15 to 60% by weight. A brazing material-coated Al or Al alloy extruded tube for a heat exchanger, which is a flux brazing mixed coating layer obtained by further mixing a flux.
記押出チューブの表面に形成されたZn溶射層と、この
Zn溶射層の上に形成されたSi:13〜45重量%、
Zn:5〜20重量%を含有し、残りがAlおよび不可
避不純物からなる組成の三元系過共晶Al合金ろう粉末
とSi粉末をSi合計量が15超〜60重量%、Zn:
1〜15重量%となるように混合した混合粉末を塗布し
たろう塗布層とで構成されていることを特徴とする熱交
換器用ろう材被覆AlまたはAl合金押出チューブ。7. An Al or Al alloy extruded tube, a Zn sprayed layer formed on the surface of the extruded tube, and 13 to 45% by weight of Si formed on the Zn sprayed layer.
A ternary hypereutectic Al alloy brazing powder and a Si powder containing 5 to 20% by weight of Zn and the balance consisting of Al and unavoidable impurities have a total amount of Si of more than 15 to 60% by weight.
A brazing material-coated Al or Al alloy extruded tube for a heat exchanger, comprising: a brazing layer coated with a mixed powder mixed to be 1 to 15% by weight.
3〜45重量%、Zn:5〜20重量%を含有し、残り
がAlおよび不可避不純物からなる組成の三元系過共晶
Al合金ろう粉末とSi粉末をSi合計量が15超〜6
0重量%、Zn:1〜15重量%となるように混合した
混合粉末に、さらにフラックスを混合してなるフラック
スろう混合塗布層であることを特徴とする熱交換器用ろ
う材被覆AlまたはAl合金押出チューブ。8. The brazing coating layer according to claim 7, wherein Si: 1
A ternary hypereutectic Al alloy brazing powder and a Si powder containing 3 to 45% by weight and Zn: 5 to 20% by weight, with the balance consisting of Al and inevitable impurities, having a total Si content of more than 15 to 6
A brazing material coating Al or Al alloy for a heat exchanger, which is a flux brazing mixed coating layer obtained by further mixing a flux with a mixed powder mixed to be 0% by weight and Zn: 1 to 15% by weight. Extrusion tube.
は8記載のろう材被覆AlまたはAl合金押出チューブ
を用いて作製されたことを特徴とする熱交換器。9. A heat exchanger produced using the brazing material-coated Al or Al alloy extruded tube according to claim 1, 2, 3, 4, 5, 6, 7, or 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15231397A JP3601257B2 (en) | 1997-06-10 | 1997-06-10 | Al or Al alloy extruded tube with brazing filler metal for heat exchanger |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15231397A JP3601257B2 (en) | 1997-06-10 | 1997-06-10 | Al or Al alloy extruded tube with brazing filler metal for heat exchanger |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11790A true JPH11790A (en) | 1999-01-06 |
JP3601257B2 JP3601257B2 (en) | 2004-12-15 |
Family
ID=15537801
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15231397A Expired - Fee Related JP3601257B2 (en) | 1997-06-10 | 1997-06-10 | Al or Al alloy extruded tube with brazing filler metal for heat exchanger |
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JP (1) | JP3601257B2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4802962A (en) * | 1983-08-22 | 1989-02-07 | Imperial Chemical Industries Plc | Treatment of cathodes for use in electrolytic cell |
EP1287934A1 (en) * | 2001-08-14 | 2003-03-05 | Mitsubishi Aluminium Kabushiki Kaisha | Heat exchanger and method for production thereof |
WO2011064199A2 (en) * | 2009-11-25 | 2011-06-03 | Behr Gmbh & Co. Kg | Soldered aluminum heat exchanger |
US8123109B2 (en) * | 2003-05-30 | 2012-02-28 | Uop Llc | Method for making brazed heat exchanger and apparatus |
WO2014020722A1 (en) * | 2012-08-01 | 2014-02-06 | 古河スカイ株式会社 | Process for producing aluminum alloy tube having sacrificial anticorrosion layer and joining layer |
JP2015517911A (en) * | 2012-03-26 | 2015-06-25 | エルプスロー・アルミニウム・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Solder powder |
WO2022050030A1 (en) * | 2020-09-02 | 2022-03-10 | 株式会社Uacj | Aluminum alloy extruded tube and heat exchanger |
-
1997
- 1997-06-10 JP JP15231397A patent/JP3601257B2/en not_active Expired - Fee Related
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4802962A (en) * | 1983-08-22 | 1989-02-07 | Imperial Chemical Industries Plc | Treatment of cathodes for use in electrolytic cell |
EP1287934A1 (en) * | 2001-08-14 | 2003-03-05 | Mitsubishi Aluminium Kabushiki Kaisha | Heat exchanger and method for production thereof |
US6708869B2 (en) | 2001-08-14 | 2004-03-23 | Mitsubishi Aluminum Kabushiki Kaisha | Method for production of heat exchanger |
US8123109B2 (en) * | 2003-05-30 | 2012-02-28 | Uop Llc | Method for making brazed heat exchanger and apparatus |
WO2011064199A2 (en) * | 2009-11-25 | 2011-06-03 | Behr Gmbh & Co. Kg | Soldered aluminum heat exchanger |
WO2011064199A3 (en) * | 2009-11-25 | 2011-10-20 | Behr Gmbh & Co. Kg | Soldered aluminum heat exchanger |
JP2015517911A (en) * | 2012-03-26 | 2015-06-25 | エルプスロー・アルミニウム・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Solder powder |
WO2014020722A1 (en) * | 2012-08-01 | 2014-02-06 | 古河スカイ株式会社 | Process for producing aluminum alloy tube having sacrificial anticorrosion layer and joining layer |
JPWO2014020722A1 (en) * | 2012-08-01 | 2016-07-11 | 株式会社Uacj | Method for manufacturing aluminum alloy tube having sacrificial anticorrosive layer and bonding layer |
US9631878B2 (en) | 2012-08-01 | 2017-04-25 | Uacj Corporation | Process for producing aluminum alloy tube having sacrificial anticorrosion layer and joining layer |
WO2022050030A1 (en) * | 2020-09-02 | 2022-03-10 | 株式会社Uacj | Aluminum alloy extruded tube and heat exchanger |
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---|---|
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