JP2003225791A - Composite tube for brazing and soldering and composite tube for heat exchanger - Google Patents
Composite tube for brazing and soldering and composite tube for heat exchangerInfo
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- JP2003225791A JP2003225791A JP2002022720A JP2002022720A JP2003225791A JP 2003225791 A JP2003225791 A JP 2003225791A JP 2002022720 A JP2002022720 A JP 2002022720A JP 2002022720 A JP2002022720 A JP 2002022720A JP 2003225791 A JP2003225791 A JP 2003225791A
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- Prior art keywords
- brazing
- material layer
- composite
- copper
- brazing material
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明が属する技術分野】本発明は、放熱フィンなどの
熱伝導部材が管材にろう接された熱交換用複合管および
その素材として用いられるろう接用複合管に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanging composite pipe in which a heat conducting member such as a radiation fin is brazed to a pipe material, and a brazing composite pipe used as a material thereof.
【０００２】[0002]
【従来の技術】銅管の外周面に銅製の放熱フィンや、加
熱媒体あるいは冷却媒体を流すための銅製細管がろう接
された熱交換用複合管は、熱交換器や種々の化学装置に
使用されている。2. Description of the Related Art A heat exchange composite pipe in which a copper radiating fin and a copper thin pipe for flowing a heating medium or a cooling medium are brazed to the outer peripheral surface of a copper pipe is used for a heat exchanger and various chemical devices. Has been done.
【０００３】前記熱交換用複合管の各部材のろう接に
は、銀銅ろう材やリン銅ろう材が使用される。銀銅ろう
材はＡｇを多量に含み高価であるため、一般的にはリン
銅ろう材がよく使用される。このリン銅ろう材は、ＪＩ
Ｓ Ｚ ３２６４に規格されており、Ｐ：４．８〜７．
５mass％含有し、一部の種類ではＡｇがさらに添加さ
れ、残部Ｃｕからなるものである。このようなリン銅ろ
う材は、加工性が非常に悪いため、主として線材、棒
材、粉末材の形態をもって供給される。A silver copper brazing material or a phosphor copper brazing material is used for brazing each member of the heat exchange composite pipe. Since the silver-copper brazing filler metal contains a large amount of Ag and is expensive, generally, a phosphor copper brazing filler metal is often used. This phosphor copper brazing material is JI
S Z 3264, P: 4.8 to 7.
It is contained at 5 mass%, Ag is further added in some kinds, and the balance is Cu. Since such a copper-copper brazing material has very poor workability, it is mainly supplied in the form of a wire rod, a rod or a powder.
【０００４】銅管の外周面に多数の円板状放熱フィンが
管軸方向に沿って所定間隔でろう接された放熱管９１を
例として、前記リン銅ろう材を用いたろう接作業につい
て説明する。まず、図１２に示すように、予め銅管９２
および棒状リン銅ろう材９３を挿通する穴部が開設され
た円板状フィン９４をプレス加工等により準備する。そ
して、銅管９２の外周面に前記円板状フィン９４を棒状
リン銅ろう材９３と共に手作業により配設して組み立て
る。図例では、１本の棒状ろう材が用いられているが、
銅管９２の直径に応じて、複数本の棒状ろう材が管外周
面に配設される。The brazing work using the phosphor copper brazing material will be described by taking the radiating pipe 91 in which a large number of disc-shaped radiating fins are brazed to the outer peripheral surface of the copper pipe along the pipe axial direction at predetermined intervals. . First, as shown in FIG.
A disk-shaped fin 94 having a hole for inserting the rod-shaped phosphorous copper brazing material 93 is prepared by pressing or the like. Then, the disk-shaped fins 94 and the rod-shaped phosphorous copper brazing material 93 are manually arranged on the outer peripheral surface of the copper tube 92 to be assembled. Although one rod-shaped brazing material is used in the illustrated example,
Depending on the diameter of the copper pipe 92, a plurality of rod-shaped brazing materials are arranged on the outer peripheral surface of the pipe.
【０００５】上記のようにして組み立てられた組立体
は、リン銅ろう材の融点以上、銅管９２やフィン９４を
形成する銅材の融点未満の適宜の温度、通常は８００℃
程度に加熱される。加熱されたろう材は溶融して銅管９
２とフィン９４との隙間に侵入する。その後、ろう材を
冷却凝固させることによって、多数のフィン９４が銅管
９２の外周面にろう接される。The assembly assembled as described above has an appropriate temperature above the melting point of the phosphor copper brazing material and below the melting point of the copper material forming the copper tubes 92 and fins 94, usually 800 ° C.
Heated to a degree. The heated brazing material melts and the copper tube 9
2 enters the gap between the fins 94 and 2. After that, the fins 94 are brazed to the outer peripheral surface of the copper tube 92 by cooling and solidifying the brazing material.
【０００６】また、銅管の外周面に螺旋状に曲げ加工さ
れた銅製細管がろう接された熱交換用複合管の場合、銅
管に螺旋状細管を装着し、手作業により前記細管と銅管
との当接部に沿って別途保持した棒状リン銅ろう材を供
給しながらバーナで加熱し、溶融させ、次いで冷却凝固
させることによって、両部材がろう接される。Further, in the case of a heat exchange composite tube in which a copper thin tube bent in a spiral shape is brazed to the outer peripheral surface of the copper tube, the spiral thin tube is attached to the copper tube and the thin tube and the copper are manually attached. Both members are brazed by supplying the rod-shaped phosphorous copper brazing material separately held along the abutting portion with the tube while heating with a burner to melt and then solidify by cooling.
【０００７】[0007]
【発明が解決しようとする課題】上記のとおり、熱交換
用複合管を製造するには、銅管および多数のフィンを棒
状リン銅ろう材を介在させた複雑な構造の組立体を手作
業によって組み立てなけらばならず、あるいは銅管に螺
旋状細管の当接部に沿って、順次ろう接しなけらばなら
ず、煩雑な作業を強いられ、生産性の低下、製造コスト
の上昇を余儀なくされている。As described above, in order to manufacture a composite pipe for heat exchange, an assembly having a complicated structure in which a copper pipe and a large number of fins interpose a rod-shaped phosphor copper brazing filler metal is manually produced. It has to be assembled or brazed to the copper tube along the abutting part of the spiral thin tube one after another, which complicates the work, lowers the productivity and increases the manufacturing cost. ing.
【０００８】本発明はかかる問題に鑑みなされたもの
で、ろう接により容易に製造することができる熱交換用
複合管およびその素材として好適なろう接用複合管を提
供することを目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide a heat exchange composite pipe which can be easily manufactured by brazing and a brazing composite pipe suitable as a material thereof.
【０００９】[0009]
【課題を解決するための手段】本発明者は、種々のＰ含
有範囲のリン銅合金の加工性、ろう接性を詳細に研究し
た結果、Ｐ：２．０〜３．２mass％という特定のＰ含有
領域において、ろう接接合性を犠牲にすることなく、著
しい加工性の改善効果が得られることを知見し、かかる
加工性の良好なリン銅ろう材を基にして本発明を完成す
るに至った。The present inventor has studied in detail the workability and brazeability of phosphorus-copper alloys having various P-containing ranges, and as a result, a specific P of 2.0 to 3.2 mass% has been determined. In the P-containing region, it was found that a remarkable workability improving effect can be obtained without sacrificing the brazing bondability, and the present invention is completed based on such a phosphorus copper brazing material having good workability. I arrived.
【００１０】すなわち、本発明のろう接用複合管は、Ｃ
ｕまたはＣｕを主成分とするＣｕ合金によって形成され
た基板の少なくとも一方の表面にろう材層が接合された
複合シートの端部同士が溶着接合層を介して管状に溶着
されて、前記基板からなる基管部に前記ろう材層が被覆
されたものであり、前記ろう材層はmass％でＰ：２．０
〜３．２％、好ましくは２．２〜２．９％を含有し、残
部実質的にＣｕからなるリン銅ろう合金によって形成さ
れ、前記溶着接合部がmass％でＰ：１．６％以下を含有
し、残部実質的にＣｕからなるリン銅合金によって形成
される。前記基板とろう材層とは圧接により容易に接合
することができる。That is, the brazing composite pipe of the present invention is C
The ends of the composite sheet, in which the brazing material layer is joined to at least one surface of the substrate formed of a Cu alloy containing u or Cu as a main component, are welded in a tubular shape through the welding joining layer, The brazing material layer is coated on the base pipe part, and the brazing material layer has a mass% of P: 2.0.
.About.3.2%, preferably 2.2 to 2.9%, the balance being formed of a phosphor copper braze alloy consisting essentially of Cu, wherein the welded joint is mass% and P: 1.6% or less. And a balance of phosphorus-copper alloy consisting essentially of Cu. The substrate and the brazing material layer can be easily joined by pressure welding.
【００１１】このろう接用複合管によれば、ろう材層を
形成する、mass％でＰ：２．０〜３．２％、好ましくは
２．２〜２．９％を含有し、残部実質的にＣｕからなる
リン銅ろう合金は、ろう接接合性を損なうことなく、優
れた冷間加工性を備えるため、基板にろう材層として、
例えば圧接により容易に接合一体化することができる。
そして、基板にろう材層が接合された複合シートも加工
性に優れるため、この複合シートを管状に容易に曲げ成
形することができる。また、複合シートの端部同士はma
ss％でＰ：１．６％以下、好ましくは１．４％以下の溶
着接合部によって溶着されているので、ろう材層のリン
銅ろう合金と溶着接合部のリン銅合金との融点差を５０
℃程度以上にすることができる。これによって、このろ
う接用複合管に別途準備した純ＣｕあるいはＣｕを主成
分とするＣｕ合金（両者を併せてＣｕ基金属と呼ぶ場合
がある。）で形成された接合部材をろう接する際に、接
合部材を複合管のろう材層の表面に付設し、ろう合金の
融点（リン銅ろう合金の共晶温度：７１４℃）以上、溶
着接合部のリン銅合金の融点未満の適宜の温度に加熱す
るだけで、溶着接合部の再溶融による口開きを生じさせ
ることなく、接合部材を複合管の基管部に容易にろう接
することができる。このため、接合部材がろう接された
複合管の製造コストの低減、生産性の向上を図ることが
できる。According to this composite tube for brazing, the brazing material layer is formed, and the mass% of P: 2.0 to 3.2%, preferably 2.2 to 2.9% is contained, and the balance is substantially the same. The phosphorus-copper brazing alloy, which is made of Cu, has excellent cold workability without impairing the brazing bondability.
For example, they can be easily joined and integrated by pressure welding.
Since the composite sheet in which the brazing material layer is joined to the substrate is also excellent in workability, this composite sheet can be easily bent into a tubular shape. The edges of the composite sheet are ma
Since ss% is welded by the welded joint of P: 1.6% or less, preferably 1.4% or less, the melting point difference between the phosphorous copper braze alloy of the brazing material layer and the phosphorous copper alloy of the welded joint is Fifty
The temperature can be set to about C or higher. Accordingly, when brazing a joining member formed of separately prepared pure Cu or a Cu alloy containing Cu as a main component (these may be collectively referred to as a Cu base metal) to the brazing composite pipe, , A joining member is attached to the surface of the brazing material layer of the composite pipe, and the temperature is adjusted to an appropriate temperature not lower than the melting point of the brazing alloy (eutectic temperature of phosphorous copper brazing alloy: 714 ° C.) and lower than the melting point of the phosphorous copper alloy at the welded joint. Only by heating, the joining member can be easily brazed to the base pipe portion of the composite pipe without causing the opening due to remelting of the welded joint portion. For this reason, it is possible to reduce the manufacturing cost and improve the productivity of the composite pipe in which the joining members are brazed.
【００１２】また、本発明の他のろう接用複合管は、Ｃ
ｕまたはＣｕを主成分とするＣｕ合金によって管状に一
体的に成形された基管部の少なくとも一方の表面にろう
材層が接合されており、前記ろう材層がmass％でＰ：
２．０〜３．２％、好ましくは２．２〜２．９％を含有
し、残部実質的にＣｕからなるリン銅ろう合金によって
形成されたものである。前記基管部と前記ろう材層とは
押し出し加工および／または引き抜き加工により容易に
管状に成形すると共に両者を一体的に接合することがで
きる。Further, another brazing composite pipe of the present invention is C
A brazing filler metal layer is bonded to at least one surface of a base pipe portion integrally formed in a tubular shape by a Cu alloy containing u or Cu as a main component, and the brazing filler metal layer is P in mass%:
It is formed of a phosphorus-copper brazing alloy containing 2.0 to 3.2%, preferably 2.2 to 2.9%, and the balance being substantially Cu. The base pipe portion and the brazing material layer can be easily formed into a tubular shape by extrusion and / or drawing, and both can be integrally joined.
【００１３】このろう接用複合管によれば、ろう材層を
形成するリン銅ろう合金は優れた冷間加工性を備えるた
め、例えば押し出し加工および／または引き抜き加工に
より基管部にろう材層が接合一体化された複合管を容易
に製造することができる。このろう接用複合管を用いれ
ば、Ｃｕ基金属で形成された接合部材を複合管のろう材
層の表面に付設し、リン銅ろう合金の融点以上、基管部
あるいは接合部材を形成する銅材の融点未満の適宜の温
度に加熱するだけで、接合部材を基管部に容易にろう接
することができる。このため、接合部品がろう接された
複合管の製造コストの低減、生産性の向上を図ることが
できる。According to this composite pipe for brazing, since the phosphorous copper brazing alloy forming the brazing material layer has excellent cold workability, the brazing material layer is formed on the base pipe portion by, for example, extrusion and / or drawing. It is possible to easily manufacture a composite pipe in which are joined and integrated. If this brazing composite pipe is used, a joining member made of a Cu-based metal is attached to the surface of the brazing filler metal layer of the composite pipe, and the melting point of the phosphorus copper braze alloy is higher than the melting point of the base pipe portion or the joining member. The joint member can be easily brazed to the base tube portion only by heating it to an appropriate temperature below the melting point of the material. Therefore, it is possible to reduce the manufacturing cost of the composite pipe in which the joint parts are brazed and to improve the productivity.
【００１４】また、本発明の熱交換用複合管は、前記ろ
う接用複合管のろう材層の表面にＣｕまたはＣｕを主成
分とするＣｕ合金によって形成された熱伝導部材を付設
し、前記ろう材層を溶融凝固させることによって前記ろ
う接用複合管の基管部に前記熱伝導部材がろう接された
ものである。In the heat exchange composite pipe of the present invention, a heat conducting member made of Cu or a Cu alloy containing Cu as a main component is attached to the surface of the brazing material layer of the brazing composite pipe, The heat conducting member is brazed to the base pipe portion of the brazing composite pipe by melting and solidifying the brazing material layer.
【００１５】この熱交換用複合管によると、前記ろう接
用複合管のろう材層の表面にＣｕ基金属で形成されたフ
ィンや細管などの熱伝導部材を付設し、ろう材層を溶融
凝固させるだけで、基管部に熱伝導部材をろう接した熱
交換用複合管を簡単容易に製造することができ、熱交換
用複合管の製造コストの低減、生産性の向上を図ること
ができる。According to this heat exchange composite pipe, a heat conducting member such as a fin or a thin tube made of Cu-based metal is attached to the surface of the brazing filler metal layer of the brazing composite pipe, and the brazing filler metal layer is melted and solidified. Only by doing so, it is possible to easily and easily manufacture the heat exchange composite pipe in which the heat conducting member is brazed to the base pipe portion, and it is possible to reduce the production cost of the heat exchange composite pipe and improve the productivity. .
【００１６】[0016]
【発明の実施の形態】Ｃｕ基金属によって形成された部
材同士をろう接する場合、ろう接部が前記Ｃｕ基金属の
引張強度と同程度の接合強度を有し、かつ複雑な部材同
士であっても容易にろう接することができ、さらにろう
材自体が人体に無害なものが好ましい。このような作用
を有するＣｕ基ろう合金の添加元素としてＰが好適であ
る。Ｐ−Ｃｕ合金は、合金中に含まれるＣｕ3Ｐ が酸化
銅に対して還元性を有し、セルフフラックス効果を有す
るため、複雑形状の部材のろう接性に優れ、またＰは人
体に対して無害だからである。BEST MODE FOR CARRYING OUT THE INVENTION When brazing members made of Cu-based metal to each other, the brazing portion has a joining strength similar to the tensile strength of the Cu-based metal and is a complicated member. It is preferable that the brazing filler metal itself can be easily brazed, and the brazing filler metal itself is harmless to the human body. P is suitable as an additional element of the Cu-based brazing alloy having such an action. The P-Cu alloy has excellent self-fluxing effect because Cu 3 P contained in the alloy has a reducing property with respect to copper oxide and a self-flux effect, and P is a human body. Because it is harmless.
【００１７】リン銅ろう合金中のＰの含有量（mass％）
は、従来、Ｃｕの引張強度レベルの接合強度を実現する
には少なくとも４％程度以上は必要と考えられており、
このため加工性に問題があった。しかしながら、本発明
者の研究により、従来より低濃度のＰ領域においても接
合性（接合強度）を劣化させることなく、加工性を飛躍
的に向上させる領域があることが知見された。先ず、リ
ン銅ろう合金のＰ含有量とろう接接合性および加工性に
ついて詳細に説明する。Content of P in phosphorus copper braze alloy (mass%)
Is conventionally thought to be required to be at least about 4% or more in order to realize the bonding strength at the tensile strength level of Cu.
Therefore, there is a problem in workability. However, as a result of research by the present inventors, it has been found that there is a region in which the workability is dramatically improved without deteriorating the bondability (bonding strength) even in the P region having a lower concentration than before. First, the P content of the phosphorous copper brazing alloy, the brazeability and workability will be described in detail.
【００１８】下記表１に示す種々のＰ含有量のＰ−Ｃｕ
合金を真空誘導溶解によって溶製し、その鋳造片を５０
０〜６００℃にて熱間圧延し、これによって得られた熱
延板（板厚８mm、板幅８０mm）をさらに冷間圧延した。
冷間圧延は冷延後の目標板厚を０．４mm（全圧下率９５
％）とし、目標板厚に至るまでに耳割れ、あるいは板割
れが発生したものについては、その割れが発生するまで
の全圧下率を求めた。圧下率が６５％以上で耳割れを発
生した試料については、５００℃×１ｈｒ程度の焼鈍を
行い、さらに目標板厚まで冷間圧延を行った。なお、耳
割れとは圧延材の側縁に高さ１〜２mm程度の鋸歯状の凹
凸が発生することをいい、板割れとは板幅に沿って圧延
板が完全に破断することをいう。板割れが発生すると、
それ以後の圧延は不可能になる。P-Cu having various P contents shown in Table 1 below.
The alloy is melted by vacuum induction melting, and the cast piece is
Hot rolling was carried out at 0 to 600 ° C., and the hot rolled sheet (sheet thickness 8 mm, sheet width 80 mm) thus obtained was further cold rolled.
In cold rolling, the target plate thickness after cold rolling is 0.4 mm (total reduction rate: 95 mm).
%), And in the case where edge cracks or plate cracks occurred up to the target plate thickness, the total reduction rate until the cracks occurred was calculated. With respect to the sample in which the edge crack occurred at a rolling reduction of 65% or more, annealing was performed at about 500 ° C. × 1 hr, and further cold rolling was performed to a target sheet thickness. The edge cracking means that saw-toothed irregularities having a height of about 1 to 2 mm occur on the side edge of the rolled material, and the plate cracking means that the rolled plate is completely broken along the plate width. When a plate crack occurs,
After that, rolling becomes impossible.
【００１９】目標板厚まで冷間圧延された冷延板は、５
００℃×１ｈｒ程度の焼鈍を行った後、さらに０．１mm
まで冷間圧延し、薄板状のろう材を得た。一方、冷間圧
延の際に板割れが発生した試料および圧下率が１０％以
下で耳割れが発生した試料については、熱延板から板厚
０．１mm（全圧下率９７％）のろう材を機械加工により
採取した。これらのろう材を用いてろう接接合性を調べ
た。The cold-rolled sheet cold-rolled to the target sheet thickness has 5
After annealing at 00 ℃ × 1hr, 0.1mm
Cold-rolled to obtain a thin brazing filler metal. On the other hand, for samples with plate cracking during cold rolling and samples with edge reduction at a rolling reduction of 10% or less, brazing filler metal with a plate thickness of 0.1 mm (total rolling reduction of 97%) Were collected by machining. The brazing bondability was investigated using these brazing materials.
【００２０】ろう接接合性は、断面が１０mm×３mmの純
Ｃｕ製の角棒材を準備し、一方の棒材と他方の棒材とを
ろう材片（１０mm×３mm）を介して突き合わせ、水素ガ
ス雰囲気中で８２０℃×１０分間保持してろう接し、得
られた接合棒材を長さ方向に破断するまで引っ張り、破
断時の引張強さ（接合強さ）を測定した。As for the brazing property, a pure Cu square bar having a cross section of 10 mm × 3 mm is prepared, and one bar and the other bar are butted against each other through a brazing piece (10 mm × 3 mm). Brazing was carried out by holding at 820 ° C. for 10 minutes in a hydrogen gas atmosphere, and the obtained joining rod was pulled in the lengthwise direction until it was fractured, and the tensile strength at the time of fracture (joint strength) was measured.
【００２１】上記Ｐ−Ｃｕ合金の加工性評価、ろう接棒
材の接合強度の測定結果を表１に併せて示す。表１中、
全圧下率は既述のように目標板厚（９５％）まで、ある
いは耳割れ、板割れ発生までの全圧下率を示す。また、
Ｐ含有量と加工性評価（全圧下率）との関係を図１に、
接合強度との関係を図２に示す。Table 1 also shows the results of evaluation of the workability of the P-Cu alloy and the measurement of the bonding strength of the brazing rod material. In Table 1,
As described above, the total reduction rate indicates the total reduction rate up to the target plate thickness (95%) or the occurrence of edge cracks and plate cracks. Also,
The relationship between P content and workability evaluation (total reduction rate) is shown in Fig. 1.
The relationship with the bonding strength is shown in FIG.
【００２２】[0022]
【表１】 [Table 1]
【００２３】表１および図１より、Ｐ≦３．２％で冷間
加工性が良好であり、特にＰ＝２．９０％を臨界点とし
てＰ≦２．９０％では板割れは勿論のこと、耳割れも皆
無であり、冷間加工性が飛躍的に向上していることがわ
かる。From Table 1 and FIG. 1, cold workability is good when P ≦ 3.2%, and especially when P ≦ 2.90% is the critical point, plate cracking is of course caused. There is no cracking in the ears, and it can be seen that the cold workability is dramatically improved.
【００２４】本発明者はかかる加工性の良否を組織面か
ら検討した。図３はＰ−Ｃｕ２元系状態図を示してお
り、１．７５％＜Ｐ＜１３．９８％（共晶組成）の領域
では組織中に生成した初晶のＰ−Ｃｕ固溶体（Ｃｕリッ
チ部）と、Ｃｕ3Ｐ とＣｕとが層状に形成された共晶組
織（Ｐリッチ部）とが共存した組織になる。実際のろう
材の熱延板組織を顕微鏡観察したところ、Ｐが３．２％
以下では大部分のＰリッチ部がＣｕリッチ部内に孤立し
て存在しているように観察され、一方Ｐが３．２％超で
はＣｕリッチ部内のＰリッチ部が相互に連なり、この傾
向はＰが多くなるほど顕著であった。そして、板割れが
生じた冷延板の組織を観察すると、Ｐ＞３．２％のもの
では、圧延により引き延ばされた前記Ｐリッチ部に沿っ
てクラックが多数発生していることが観察された。これ
より、Ｐ＝３．２％は脆くてクラックの発生し易いＰリ
ッチ部がＣｕリッチ部の中にほぼ孤立し得る限界のＰ含
有量であると知見された。The present inventor examined the quality of the workability from the viewpoint of the structure. FIG. 3 shows a P-Cu binary system phase diagram. In the region of 1.75% <P <13.98% (eutectic composition), the primary crystal P-Cu solid solution (Cu-rich portion) formed in the structure was formed. ) And a eutectic structure (P-rich portion) in which Cu 3 P and Cu are formed in a layered form coexist. Microscopic observation of the actual hot-rolled sheet structure of the brazing material showed that P was 3.2%.
In the following, it is observed that most of the P-rich portions exist independently in the Cu-rich portion. On the other hand, if P exceeds 3.2%, the P-rich portions in the Cu-rich portion are connected to each other, and this tendency is P. It was more remarkable as the number increased. Then, when observing the structure of the cold-rolled sheet in which the sheet crack occurred, it was observed that, in the case of P> 3.2%, many cracks were generated along the P-rich portion stretched by rolling. Was done. From this, it was found that P = 3.2% is the limit P content at which the P-rich portion, which is brittle and easily cracks, can be almost isolated in the Cu-rich portion.
【００２５】また、表１および図２より、Ｐ＝２．０％
以上ではほぼ純Ｃｕと同レベルの引張強さ（１８kgf／m
m2程度）を有し、特に２．２％以上では優れた接合強度
が得られている。一方、Ｐ含有量が２．０未満〜１．２
％程度であっても一応の接合強度が得られている。理論
的には、図３の状態図から明らかなように、１．７５％
以下ではＰ−Ｃｕ固溶体のみが生成し、共晶組織が生成
しないため、ろう材として使用不可のはずであるが、Ｐ
の偏析により部分的にＰ＞１．７５％の領域が生じ、こ
の部分がろう材として寄与しているものと推察される。
なお、引張試験における破断部位は、すべてろう接接合
部であった。From Table 1 and FIG. 2, P = 2.0%
With the above, the tensile strength is almost the same as that of pure Cu (18kgf / m
m 2 ), and particularly at 2.2% or more, excellent bonding strength is obtained. On the other hand, P content is less than 2.0 to 1.2
Even if it is about%, a tentative bonding strength is obtained. Theoretically, as is clear from the state diagram of FIG. 3, 1.75%
In the following, since only a P-Cu solid solution is produced and no eutectic structure is produced, it cannot be used as a brazing filler metal.
The segregation of P causes a region of P> 1.75% in part, and it is presumed that this part contributes as a brazing filler metal.
The fractured parts in the tensile test were all brazed joints.
【００２６】以上より、本発明にかかるリン銅ろう合金
は、従来レベルの接合強度と、圧下率が９５％以上の冷
間圧延が可能な加工性とを兼備するＰ含有量として、
２．０〜３．２％、好ましくは２．２〜２．９％とし
た。残部は実質的にＣｕからなるが、残部実質的とは残
部がＣｕおよび不可避的不純物からなる場合のほか、前
記Ｐ含有の作用、効果を妨げない範囲で他の合金元素の
添加を妨げないことを意味する。From the above, the phosphorus-copper brazing alloy according to the present invention has a P content that has both the conventional bonding strength and the workability capable of cold rolling with a reduction ratio of 95% or more.
It was set to 2.0 to 3.2%, preferably 2.2 to 2.9%. The balance substantially consists of Cu, but the balance substantially means that the balance is composed of Cu and inevitable impurities, and addition of other alloying elements is not hindered as long as the action and effect of the P-containing are not hindered. Means
【００２７】次に、本発明にかかるろう接用複合管の実
施形態について説明する。図４は第１実施形態にかかる
ろう接用複合管１であり、Ｃｕ基金属で形成された基板
の外周面に前記リン銅ろう合金からなるろう材層が圧接
一体化された複合シートが管状に成形され、その端部同
士が溶着接合部４を介して溶着されている。前記複合シ
ートの基板は、ろう接用複合管においては管状の形態を
有するので基管部２と呼び、複合シートのろう材層は、
ろう接用複合管１においてもろう材層３と呼ぶ。Next, an embodiment of the brazing composite pipe according to the present invention will be described. FIG. 4 shows a brazing composite tube 1 according to the first embodiment, in which a composite sheet in which a brazing material layer made of the phosphor copper-copper brazing alloy is pressure-bonded integrally to the outer peripheral surface of a substrate formed of Cu-based metal is tubular. And the ends are welded to each other via the welded joint 4. Since the substrate of the composite sheet has a tubular shape in the brazing composite pipe, it is referred to as the base pipe portion 2, and the brazing material layer of the composite sheet is
The brazing composite pipe 1 is also called a brazing material layer 3.
【００２８】管状に成形される前の複合シート１Ａは、
図５に示すように、Ｃｕ基金属の基板２Ａの片面に冷間
加工性が良好な前記リン銅ろう合金からなるろう材層３
Ａを圧接一体化して積層されたものである。前記リン銅
ろう合金は冷間加工性が良好であるので、基板２Ａの素
材のＣｕ基金属素板に、ろう材層３Ａの素材のろう材素
板を重ね合わせ、重ね合わされた両素板を一対のロール
に通して冷間圧接することによって、複合シート１Ａを
簡単、容易に製造することができる。The composite sheet 1A before being formed into a tubular shape is
As shown in FIG. 5, a brazing material layer 3 made of the phosphorous copper brazing alloy having good cold workability is formed on one surface of the substrate 2A made of Cu-based metal.
A is pressed and integrated to be laminated. Since the copper-copper brazing alloy has good cold workability, the Cu-based metal base plate of the material of the substrate 2A is overlaid with the braze base metal plate of the base material of the brazing material layer 3A, and the both base plates are superposed. The composite sheet 1A can be simply and easily manufactured by passing through a pair of rolls and cold-pressing.
【００２９】前記複合シート１Ａの厚さは、必要に応じ
て適宜決定されるが、代表的には０．５〜１．５mm程度
とされ、前記ろう材層３Ａの厚さは３０〜１００μm 程
度でよい。基板２ＡをＣｕ基金属で形成することによ
り、基板２Ａとろう材層３Ａとの圧接性が向上し、また
ろう接時における両者の溶着性も良好となる。The thickness of the composite sheet 1A is appropriately determined according to need, but is typically about 0.5 to 1.5 mm, and the thickness of the brazing material layer 3A is about 30 to 100 μm. Good. By forming the substrate 2A with the Cu-based metal, the pressure contact between the substrate 2A and the brazing material layer 3A is improved, and the weldability between the two at the time of brazing is improved.
【００３０】前記Ｃｕ基金属としては、純Ｃｕのほか、
Ｃｕを主成分とし、構成成分が完全に固溶状態をなす、
例えばＣｕ−Ｎｉ合金、Ｃｕ−Ｍｎ−Ｎｉ合金を用いる
ことができる。Ｃｕ含有量は、概ね８５％程度以上あれ
ばよい。前記Ｃｕ基合金には、Ｃｕに固溶し、ろう材の
加工性、ろう接後のろう材部の特性を損なわない元素で
あれば、その微量添加は許容される。As the Cu-based metal, in addition to pure Cu,
With Cu as the main component, the constituents are completely in solid solution,
For example, a Cu-Ni alloy or a Cu-Mn-Ni alloy can be used. The Cu content may be about 85% or more. The Cu-based alloy is allowed to be added in a trace amount as long as it is an element that forms a solid solution in Cu and does not impair the workability of the brazing material and the characteristics of the brazing material after brazing.
【００３１】前記溶着接合部は、mass％でＰ：１．６％
以下、好ましくは１．４％以下を含有し、残部実質的に
Ｃｕからなるリン銅合金で形成さており、前記リン銅ろ
う合金に比して、Ｐ量が共晶組成（１．７５％）より少
なくとも０．１５％少ない。共晶組成との差が０．１５
％と言えども、図３のＣｕ−Ｐ２元系状態図から明らか
なように、この辺りの固液境界線は傾斜度は大きいた
め、Ｐ：１．６mass％でも共晶合金との融点差は５０℃
程度ある。このため、リン銅ろう材の融点より数十度高
い温度に加熱することにより、溶着接合部を再溶融させ
ることなく、ろう材層のみを溶融凝固させることができ
る。The welded joint has a mass% P: 1.6%.
The content of P is eutectic composition (1.75%) as compared with the phosphorus-copper brazing alloy, and the content is preferably 1.4% or less and the balance is substantially Cu. At least 0.15% less. Difference from eutectic composition is 0.15
However, as is clear from the Cu-P binary system phase diagram in FIG. 3, since the solid-liquid boundary line around this has a large gradient, the melting point difference with the eutectic alloy is P: 1.6 mass%. 50 ° C
There is a degree. Therefore, by heating to a temperature of several tens of degrees higher than the melting point of the phosphor copper brazing filler metal, only the brazing filler metal layer can be melted and solidified without remelting the welded joint.
【００３２】管状に曲げ成形した複合シート１Ａの端部
同士を溶着させて溶着接合部４を形成するには、複合シ
ート１Ａの端部同士を突き合わせ、ＴＩＧ溶接やシーム
溶接することによって、ろう材層３のＰ量を基管部２の
Ｃｕ基金属により希釈した溶着接合部４を容易に形成す
ることができる。また、ろう材層３中のＰ量を希釈する
ことができる溶接ワイヤ、例えば銅ワイヤを用いてＭＩ
Ｇ溶接してもよい。In order to form the welded joint 4 by welding the ends of the composite sheet 1A bent into a tubular shape, the ends of the composite sheet 1A are butted against each other, and the brazing filler metal is welded by TIG welding or seam welding. It is possible to easily form the welded joint portion 4 in which the amount of P of the layer 3 is diluted with the Cu base metal of the base tube portion 2. In addition, a welding wire capable of diluting the amount of P in the brazing material layer 3, such as a copper wire, is used for MI.
G welding may be performed.
【００３３】ＴＩＧ溶接やシーム溶接などの他成分が混
入しない溶接方法を適用する場合、基管部２（基板２
Ａ）とろう材層３との厚さの比率を適宜設定することに
よって所期のＰ濃度とすることができる。例えば、基板
を純Ｃｕで形成し、ろう材層を２．８５mass％Ｐ−Ｃｕ
合金で形成する場合、複合シートにおけるろう材層の厚
さ比率（ろう材層の厚さ／全体の厚さ）を２５％とした
ときの溶着接合部４のＰ濃度は０．７mass％、同様に厚
さ比率を５０％したときでも１．４mass％Ｐである。な
お、Ｐ量がＰ−Ｃｕ合金の共晶組成（１．７５mass％
Ｐ）となる、ろう材層の厚さ比は６１％である。また、
基管部２（基板２Ａ）がＣｕを主成分とするＣｕ基合金
で形成される場合、ＮｉやＭｎなどの合金化元素も溶着
接合部４に含まれるが、これらの合金化元素はリン銅合
金の融点を上昇させる方向に作用するので、ろう材の融
点との融点差はより拡大する。When a welding method such as TIG welding or seam welding in which other components are not mixed is applied, the base pipe portion 2 (the substrate 2
The desired P concentration can be obtained by appropriately setting the thickness ratio between A) and the brazing material layer 3. For example, the substrate is made of pure Cu and the brazing material layer is 2.85 mass% P-Cu.
When formed of an alloy, the P concentration of the welded joint portion 4 is 0.7 mass% when the thickness ratio of the brazing material layer (thickness of brazing material layer / total thickness) in the composite sheet is 25%, Even when the thickness ratio is 50%, it is 1.4 mass% P. In addition, the amount of P is a eutectic composition of P-Cu alloy (1.75 mass%
The thickness ratio of the brazing material layer, which is P), is 61%. Also,
When the base tube portion 2 (substrate 2A) is formed of a Cu-based alloy containing Cu as a main component, alloying elements such as Ni and Mn are also included in the welded joint portion 4, but these alloying elements are phosphorus copper. Since it acts in the direction of increasing the melting point of the alloy, the melting point difference from the melting point of the brazing material is further expanded.
【００３４】ここで、実際に、複合シートを突き合わせ
てＴＩＧ溶接し、溶着接合部を介して接合された複合シ
ートをろう付け温度７９０℃に１５分間保持して、前記
溶着接合部の再溶融状況を調べた結果を示す。複合シー
トの厚さは０．４mm、基板の材質は純Ｃｕ、ろう材層を
形成するＰ−Ｃｕろう合金のＰ量は２．９mass％であ
り、ろう材層の厚さ比（ろう材層の厚さ／全体の厚さ）
を種々設定した。複合シートは、その端面同士を突き合
わせ、突き合わせ部をＴＩＧ溶接した。溶接条件は、溶
接電流：１１３Ａ、溶接電圧：１２．７Ｖ、溶接速度：
４ｍ／min 、シールドガス：（アルゴン＋水素）ガスと
した。上記溶接により得られた溶着接合部のＰ量、再溶
融の発生状態を表２に併せて示す。表２より、ろう材層
の厚さ比を適宜設定することにより、溶着接合部のＰ量
を制御することができ、この例では５０％以下とするこ
とにより、溶着接合部を再溶融させることなく、ろう接
が可能なことがわかる。Here, actually, the composite sheets are butted against each other and TIG-welded, and the composite sheet joined through the welded joint is held at a brazing temperature of 790 ° C. for 15 minutes to remelt the welded joint. The results of examination are shown below. The thickness of the composite sheet is 0.4 mm, the material of the substrate is pure Cu, the P content of the P—Cu brazing alloy forming the brazing material layer is 2.9 mass%, and the thickness ratio of the brazing material layer (brazing material layer Thickness / total thickness)
Was set variously. The end faces of the composite sheet were butted, and the butted portions were TIG welded. Welding conditions are: welding current: 113 A, welding voltage: 12.7 V, welding speed:
4 m / min, shield gas: (argon + hydrogen) gas. Table 2 also shows the P content of the welded joint obtained by the above welding and the state of remelting. From Table 2, by appropriately setting the thickness ratio of the brazing filler metal layer, the amount of P in the welded joint can be controlled. In this example, by setting it to 50% or less, the welded joint is remelted. It can be seen that brazing is possible without it.
【００３５】[0035]
【表２】 [Table 2]
【００３６】なお、銅製部材のろう接には、前記リン銅
ろう材の他、銀銅ろう材も用いられる。この銀銅ろう材
で複合シートのろう材層を形成した場合、ろう材として
８５mass％Ａｇ−Ｃｕ合金を用いると、溶着接合部のＡ
ｇ濃度を共晶組成（８．０mass％Ａｇ）未満にするに
は、ろう材層の厚さ比率が９．５％未満にする必要があ
り、前記リン銅ろう合金を使用する場合に比してろう材
層の厚さ比率が制限される。In addition to the phosphor copper brazing material, silver copper brazing material is also used for brazing copper members. When a brazing material layer of a composite sheet is formed from this silver-copper brazing material, if 85 mass% Ag-Cu alloy is used as the brazing material,
In order to reduce the g concentration to be less than the eutectic composition (8.0 mass% Ag), the thickness ratio of the brazing material layer needs to be less than 9.5%, which is lower than that when the phosphor copper-copper brazing alloy is used. The thickness ratio of the brazing material layer is limited.
【００３７】図６は第２実施形態にかかるろう接用複合
管１１であり、円筒形に一体的に成形された基管部１２
と、この基管部１２の外周面に一体的に接合されたろう
材層１３とを備えている。第２実施形態では、第１実施
形態のように溶着接合部を有しない。基管部１２の材
質、ろう材層１３の材質は、第１実施形態と同様、前記
Ｃｕ基金属、前記２．０〜３．２（好ましくは２．０〜
２．９）mass％Ｐ、残部実質的にＣｕからなるリン銅ろ
う合金で形成されている。前記基管部１２の厚さ、ろう
材層１３の厚さも第１実施形態の基管部２、ろう材層３
と同様に考えることができる。FIG. 6 shows a brazing composite pipe 11 according to the second embodiment, which is a base pipe portion 12 integrally formed in a cylindrical shape.
And a brazing material layer 13 integrally bonded to the outer peripheral surface of the base pipe portion 12. The second embodiment does not have a welded joint as in the first embodiment. The material of the base tube portion 12 and the material of the brazing material layer 13 are the same as in the first embodiment, the Cu-based metal, and the 2.0 to 3.2 (preferably 2.0 to 3.2).
2.9) It is made of a phosphorus copper brazing alloy consisting of mass% P and the balance substantially Cu. The thickness of the base pipe portion 12 and the thickness of the brazing material layer 13 are also the same as the base pipe portion 2 and the brazing material layer 3 of the first embodiment.
You can think in the same way as.
【００３８】このろう接用複合管１１は、前記リン銅ろ
う合金で形成された筒状素材の中心穴に前記Ｃｕ基金属
によって形成された筒状素材あるいは軸状素材を嵌合し
た複合ビレットを準備し、これを熱間、温間あるいは冷
間にて押し出し加工することによって容易に製造するこ
とができる。押し出し加工された複合管に縮径加工を施
すために、さらに熱間、温間あるいは冷間にて引き抜き
加工を施してもよい。あるいはまた、筒状の複合ビレッ
トを用いて、直接、に引き抜き加工を施してもよい。This brazing composite tube 11 is a composite billet in which a tubular material or a tubular material made of the Cu-based metal is fitted in the central hole of the tubular material made of the phosphor copper braze alloy. It can be easily manufactured by preparing and extruding it hot, warm or cold. In order to reduce the diameter of the extruded composite tube, it may be subjected to a drawing process during hot, warm or cold. Alternatively, a cylindrical composite billet may be used to directly perform the drawing process.
【００３９】次に、上記実施形態にかかるろう接用複合
管１，１１を素材として用いた熱交換用複合管の実施形
態について説明する。図７は第１実施形態にかかる熱交
換用複合管３１の斜視図であり、前記ろう接用複合管
１、１１の基管部２、１２の外周面に、熱伝導部材とし
て放熱用の円板状フィン３４が多数、軸方向に所定の間
隔を隔ててろう接されている。前記フィン３４は、基管
部と同様、Ｃｕ基金属で形成されている。前記基管部
２、１２の外周面にはろう接の際に一旦溶融し、凝固し
たろう材層３３が被覆されている。Next, an embodiment of a heat exchange composite pipe using the brazing composite pipes 1 and 11 according to the above embodiment as a material will be described. FIG. 7 is a perspective view of the heat exchanging composite pipe 31 according to the first embodiment, and a circle for heat dissipation is provided as a heat conducting member on the outer peripheral surface of the base pipe portions 2 and 12 of the brazing composite pipes 1 and 11. A large number of plate-shaped fins 34 are brazed at predetermined intervals in the axial direction. The fins 34 are made of Cu-based metal, like the base tube portion. The outer peripheral surfaces of the base pipe portions 2 and 12 are covered with a brazing material layer 33 that is once melted and solidified during brazing.
【００４０】この熱交換用複合管は以下の要領にて簡単
に製造される。前記ろう接用複合管１、１１の外周面に
フィン３４を所定間隔に装着保持し、ろう材の融点すな
わち共晶温度（７１４℃）以上、溶着接合部４のリン銅
合金の融点未満（第１実施形態のろう接用複合管１の場
合）の温度、あるいは基管部１２またはフィン３３を形
成するＣｕ基金属の融点未満（第２実施形態のろう接用
複合管１１の場合）の温度にて加熱冷却し、ろう材層
３、１３を溶融凝固させることで、基管部２、１２の外
周面にフィン３４を容易にろう接することができる。通
常、ろう接温度は、ろう材の融点＋５０〜１００℃程度
とすればよい。ろう接は真空中、あるいは水素ガス等の
還元ガス雰囲気中で行うことが好ましい。This composite tube for heat exchange is simply manufactured by the following procedure. The fins 34 are mounted and held at predetermined intervals on the outer peripheral surfaces of the brazing composite pipes 1 and 11, and the melting point of the brazing material, that is, the eutectic temperature (714 ° C.) or higher and the melting point of the phosphorus-copper alloy of the welded joint 4 is lower ( Temperature in the case of the brazing composite pipe 1 according to the first embodiment) or a temperature lower than the melting point of the Cu base metal forming the base pipe portion 12 or the fins 33 (in the case of the brazing composite pipe 11 according to the second embodiment). The fins 34 can be easily brazed to the outer peripheral surfaces of the base pipe portions 2 and 12 by heating and cooling at 3 to melt and solidify the brazing material layers 3 and 13. Usually, the brazing temperature may be about the melting point of the brazing material + 50 to 100 ° C. The brazing is preferably performed in vacuum or in a reducing gas atmosphere such as hydrogen gas.
【００４１】図８は第２実施形態にかかる熱交換用複合
管４１を示す横断面図であり、前記ろう接用複合管１、
１１の基管部２、１２の外周面に、熱伝導部材として波
形状に屈曲形成された波形状フィン４４が周方向に沿っ
て付設され、その谷部下面がろう材層４３によってろう
接されている。この実施形態の場合も、前記ろう接用複
合管１、１１に波形状フィン４４を装着して、所定温度
に加熱冷却するだけで容易に波形状フィン４４を基管部
２、１２の外周面にろう接することができる。なお、こ
の熱交換用複合管４１の場合、基管部と波形状フィンと
の間の空間部４５に加熱媒体や冷却媒体を通すことがで
きる。FIG. 8 is a cross-sectional view showing a heat exchange composite pipe 41 according to the second embodiment. The brazing composite pipe 1,
Corrugated fins 44 formed into a corrugated shape as a heat conducting member are attached to the outer peripheral surfaces of the base pipe portions 2 and 12 of 11 along the circumferential direction, and the lower surface of the valley portion is brazed by the brazing material layer 43. ing. Also in this embodiment, the corrugated fins 44 can be easily attached to the brazing composite pipes 1 and 11 and heated and cooled to a predetermined temperature to easily form the corrugated fins 44 on the outer peripheral surfaces of the base pipe portions 2 and 12. You can contact with a deaf person. In the case of the heat exchange composite pipe 41, the heating medium or the cooling medium can be passed through the space 45 between the base pipe portion and the corrugated fins.
【００４２】図９は第３実施形態にかかる熱交換用複合
管５１を示す横断面図であり、前記ろう接用複合管１、
１１の基管部２、１２の外周面に、熱伝導部材として銅
製の螺旋状細管５４がろう材層５３によってろう接され
たものである。この場合、ろう接用複合管１、１１の外
周面に銅製細管を螺旋状に巻き付け、これをろう接温度
に加熱することによって長尺の熱交換用複合管５１を容
易に製造することができる。前記細管５４には適宜の加
熱媒体、冷却媒体を流すことができる。FIG. 9 is a cross-sectional view showing a heat exchanging composite pipe 51 according to the third embodiment. The brazing composite pipe 1,
A spiral thin tube 54 made of copper is brazed to the outer peripheral surfaces of the base tube portions 2 and 12 of 11 by a brazing material layer 53 as a heat conducting member. In this case, a long heat-exchange composite pipe 51 can be easily manufactured by spirally winding a copper thin pipe around the outer peripheral surfaces of the brazing composite pipes 1 and 11 and heating this to the brazing temperature. . Appropriate heating medium and cooling medium can be passed through the thin tube 54.
【００４３】図１０は第４実施形態にかかる熱交換用複
合管６１を示す横断面図であり、偏平状の基管部２、１
２の内周面に、熱伝導部材として波形状に屈曲形成され
た波形状フィン６４が管軸方向に沿って付設され、その
谷部の下面および山部の上面がろう材層６３によってろ
う接されている。この実施形態の場合、ろう接用複合管
としては、偏平状の基管部２、１２に内周面にろう材層
６３が接合されたろう接用複合管を用い、その内部空間
に波形状フィン６４を装着して、所定温度に加熱冷却す
るだけで容易に波形状フィン６４を基管部２、１２の内
周面にろう接することができる。なお、この熱交換用複
合管６１の場合も、基管部と波形状フィンとの間の空間
部６５に加熱媒体や冷却媒体を通すことができる。FIG. 10 is a cross-sectional view showing a heat exchange composite pipe 61 according to the fourth embodiment. The flat base pipe portions 2, 1 are shown in FIG.
A corrugated fin 64 bent in a corrugated shape as a heat conducting member is attached to the inner peripheral surface of 2 along the pipe axial direction, and the lower surface of the valley and the upper surface of the mountain are brazed by the brazing material layer 63. Has been done. In the case of this embodiment, as the brazing composite pipe, a brazing composite pipe in which the brazing material layer 63 is joined to the inner peripheral surfaces of the flat base pipe portions 2 and 12 is used, and the corrugated fins are provided in the inner space thereof. The corrugated fins 64 can be easily brazed to the inner peripheral surfaces of the base pipe portions 2 and 12 only by mounting 64 and heating and cooling to a predetermined temperature. Also in the case of the heat exchange composite pipe 61, the heating medium or the cooling medium can be passed through the space 65 between the base pipe portion and the corrugated fins.
【００４４】フィンや細管等の熱伝導部材は、上記実施
形態のように、基管部２、１２の外面あるいは内面に限
らず、内外両面にろう接するようにしてもよい。この場
合、素材として用いるろう接用複合管は、ろう材層を基
管部の内外両面に接合するようにする。その素材となる
複合シート１Ｂは、図１１に示すように、基板２Ａの両
面にろう材層３Ａ、３Ａが形成される。The heat conducting members such as fins and thin tubes are not limited to the outer surface or the inner surface of the base pipe portions 2 and 12 as in the above embodiment, but may be brazed to both the inner and outer surfaces. In this case, in the brazing composite pipe used as a material, the brazing material layer is bonded to both the inner and outer surfaces of the base pipe portion. As shown in FIG. 11, the composite sheet 1B as the material has brazing material layers 3A and 3A formed on both surfaces of the substrate 2A.
【００４５】また、熱交換用複合管の基管部の形状も上
記実施形態のように円筒形、偏平形状に限らず、方形状
あるいは多角形状に形成することができる。この場合、
その素材となるろう接用複合材を同形状に形成すること
は勿論である。Further, the shape of the base tube portion of the heat exchange composite tube is not limited to the cylindrical shape or the flat shape as in the above-mentioned embodiment, but may be formed in a square shape or a polygonal shape. in this case,
It goes without saying that the brazing composite material, which is the material thereof, is formed into the same shape.
【００４６】[0046]
【発明の効果】本発明のろう接用複合管によれば、加工
性の良好なＰ：２．０〜３．２mass％を含有するリン銅
ろう合金からなるろう材層にＣｕ基金属で形成された熱
伝導部材を付設し、前記リン銅ろう合金の融点以上の所
期温度に加熱冷却するだけで、Ｃｕ基金属で形成された
基管部の表面に前記熱伝導部材を簡単容易にろう接する
ことができ、これによって得られる熱交換用複合管の生
産性を向上させるとともに、製造コストを低減すること
ができる。EFFECTS OF THE INVENTION According to the composite pipe for brazing of the present invention, a Cu base metal is formed in a brazing material layer made of a phosphorus copper brazing alloy containing P: 2.0 to 3.2 mass% with good workability. It is possible to easily and easily attach the heat conducting member to the surface of the base pipe portion formed of Cu base metal by simply attaching the heat conducting member to the surface and heating and cooling it to a desired temperature above the melting point of the phosphor copper braze alloy. The heat exchange composite pipe thus obtained can be improved in productivity and the manufacturing cost can be reduced.
【図１】Ｐ含有量と加工性（目標板厚あるいは割れ発生
までの全圧下率）との関係を示すグラフである。FIG. 1 is a graph showing the relationship between P content and workability (target plate thickness or total reduction rate until cracking occurs).
【図２】Ｐ含有量とろう接接合強度との関係を示すグラ
フである。FIG. 2 is a graph showing the relationship between P content and brazing strength.
【図３】Ｐ−Ｃｕ合金の部分状態図である。FIG. 3 is a partial state diagram of a P—Cu alloy.
【図４】第１実施形態にかかるろう接用複合管の横断面
図である。FIG. 4 is a cross-sectional view of the brazing composite tube according to the first embodiment.
【図５】ろう接用複合管の素材として使用される複合シ
ートの部分断面図である。FIG. 5 is a partial cross-sectional view of a composite sheet used as a material for a brazing composite tube.
【図６】第２実施形態にかかるろう接用複合管の横断面
図である。FIG. 6 is a cross-sectional view of a brazing composite tube according to a second embodiment.
【図７】第１実施形態にかかる熱交換用複合管の斜視図
である。FIG. 7 is a perspective view of the composite tube for heat exchange according to the first embodiment.
【図８】第２実施形態にかかる熱交換複合管の横断面で
ある。FIG. 8 is a cross section of a heat exchange composite tube according to a second embodiment.
【図９】第３実施形態にかかる熱交換用複合管の斜視図
である。FIG. 9 is a perspective view of a composite tube for heat exchange according to a third embodiment.
【図１０】第４実施形態にかかる熱交換複合管の横断面
である。FIG. 10 is a cross section of a heat exchange composite tube according to a fourth embodiment.
【図１１】ろう接用複合管の素材として使用される他の
複合シートの部分断面図である。FIG. 11 is a partial cross-sectional view of another composite sheet used as a material for a brazing composite tube.
【図１２】従来の熱交換用複合管のろう接前の組立体を
示す斜視図である。FIG. 12 is a perspective view showing an assembly of a conventional heat exchange composite pipe before brazing.
【符号の説明】 １、１１ ろう接用複合管 ２、１２ 基管部 ３、１３ ろう材層 １Ａ、１Ｂ 複合シート ２Ａ 基板 ３Ａ ろう材層 ３１、４１、５１、６１ 熱交換用複合管 ３４、４４、６４ フィン（熱伝導部材） ５４ 螺旋状細管（熱伝導部材）[Explanation of symbols] 1, 11 Brazing composite tube 2,12 Base pipe part 3,13 Brazing material layer 1A, 1B composite sheet 2A substrate 3A brazing material layer 31, 41, 51, 61 Heat exchange composite pipe 34, 44, 64 fins (heat conduction member) 54 spiral thin tube (heat conduction member)
Claims (6)
によって形成された基板の少なくとも一方の表面にろう
材層が接合された複合シートの端部同士が溶着接合部を
介して管状に溶着されて、前記基板からなる基管部に前
記ろう材層が被覆されたろう接用複合管であって、 前記ろう材層はmass％でＰ：２．０〜３．２％を含有
し、残部実質的にＣｕからなるリン銅ろう合金によって
形成され、前記溶着接合部はmass％でＰ：１．６％以下
を含有し、残部実質的にＣｕからなるリン銅合金によっ
て形成された、ろう接用複合管。1. A composite sheet, in which a brazing material layer is bonded to at least one surface of a substrate formed of Cu or a Cu alloy containing Cu as a main component, ends of a composite sheet are welded in a tubular shape via a welded joint. A brazing composite pipe in which a base pipe part made of the substrate is coated with the brazing material layer, wherein the brazing material layer contains P: 2.0 to 3.2% in mass% and the balance substantially. Formed by a phosphorus-copper brazing alloy consisting essentially of Cu, the welded joint containing P: 1.6% or less in mass% and the balance consisting of a phosphorus-copper alloy consisting essentially of Cu, for brazing Composite pipe.
された請求項１に記載したろう接用複合管。2. The brazing composite pipe according to claim 1, wherein the substrate and the brazing material layer are joined by pressure welding.
によって管状に一体的に成形された基管部の少なくとも
一方の表面にろう材層が接合されたろう接用複合管であ
って、 前記ろう材層はmass％でＰ：２．０〜３．２％を含有
し、残部実質的にＣｕからなるリン銅ろう合金によって
形成された、ろう接用複合管。3. A brazing composite pipe in which a brazing material layer is joined to at least one surface of a base pipe portion integrally formed in a tubular shape by Cu or a Cu alloy containing Cu as a main component, A brazing composite tube formed of a phosphorous copper brazing alloy, the material layer of which contains P: 2.0 to 3.2% in mass% and the balance being substantially Cu.
加工および／または引き抜き加工により一体的に接合さ
れた請求項３に記載したろう接用複合管。4. The brazing composite pipe according to claim 3, wherein the base pipe portion and the brazing material layer are integrally joined by extrusion and / or drawing.
中のＰ含有量がmass％でＰ：２．２〜２．９％である請
求項１から４のいずれか１項に記載したろう接用複合
管。5. The P content in the phosphorous copper brazing alloy forming the brazing material layer is P: 2.2 to 2.9% in mass%, according to any one of claims 1 to 4. Composite pipe for brazing.
たろう接用複合管のろう材層の表面にＣｕまたはＣｕを
主成分とするＣｕ合金によって形成された熱伝導部材を
付設し、前記ろう材層を溶融凝固させることによって前
記ろう接用複合管の基管部に前記熱伝導部材がろう接さ
れた、熱交換用複合管。6. A heat conducting member made of Cu or a Cu alloy containing Cu as a main component is attached to the surface of the brazing material layer of the brazing composite pipe according to claim 1. A heat exchange composite pipe in which the heat conducting member is brazed to a base pipe portion of the brazing composite pipe by melting and solidifying the brazing material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002022720A JP3822108B2 (en) | 2002-01-31 | 2002-01-31 | Composite pipe for brazing and heat exchange composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002022720A JP3822108B2 (en) | 2002-01-31 | 2002-01-31 | Composite pipe for brazing and heat exchange composite pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003225791A true JP2003225791A (en) | 2003-08-12 |
| JP3822108B2 JP3822108B2 (en) | 2006-09-13 |
Family
ID=27745639
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002022720A Expired - Fee Related JP3822108B2 (en) | 2002-01-31 | 2002-01-31 | Composite pipe for brazing and heat exchange composite pipe |
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| Country | Link |
|---|---|
| JP (1) | JP3822108B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100754341B1 (en) * | 2006-04-12 | 2007-08-31 | 김종면 | Copper-pipe connetor and manufacturing method thereby |
-
2002
- 2002-01-31 JP JP2002022720A patent/JP3822108B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100754341B1 (en) * | 2006-04-12 | 2007-08-31 | 김종면 | Copper-pipe connetor and manufacturing method thereby |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3822108B2 (en) | 2006-09-13 |
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