JPH10197193A - Alloy tube for heat transfer tube of heat exchanger and its manufacture - Google Patents
Alloy tube for heat transfer tube of heat exchanger and its manufactureInfo
- Publication number
- JPH10197193A JPH10197193A JP434197A JP434197A JPH10197193A JP H10197193 A JPH10197193 A JP H10197193A JP 434197 A JP434197 A JP 434197A JP 434197 A JP434197 A JP 434197A JP H10197193 A JPH10197193 A JP H10197193A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- heat exchanger
- alloy
- pipe
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は熱交換器の伝熱管用
合金管及びその製造方法に関する。The present invention relates to an alloy tube for a heat transfer tube of a heat exchanger and a method for producing the same.
【０００２】[0002]
【従来の技術】従来、火力，原子力，石油，化学プラン
ト用熱交換器，産業用熱交換器，車載用熱交換器，民生
用熱交換器の伝熱管は、耐食性が良好であるため、銅合
金管が使用されている。しかし、銅合金製の伝熱管であ
っても、長期間使用すると腐食が進行し、冷却水が漏れ
ることがある。このため、各種のプラントに使用される
熱交換器では、冷却水中に第１鉄イオンを注入すること
により、伝熱管の内面に水酸化鉄または酸化鉄を主成分
とする保護皮膜を形成し、耐食性の改善が施されてい
る。2. Description of the Related Art Conventionally, heat transfer tubes for thermal, nuclear, petroleum, and chemical plants, industrial heat exchangers, heat exchangers for vehicles, and heat exchangers for consumer use have good corrosion resistance, and therefore have a high corrosion resistance. Alloy tubes are used. However, even if the heat transfer tube is made of a copper alloy, if it is used for a long period of time, corrosion may progress and cooling water may leak. For this reason, in heat exchangers used in various plants, ferrous ions are injected into cooling water to form a protective film mainly composed of iron hydroxide or iron oxide on the inner surface of the heat transfer tube, Improvements in corrosion resistance have been made.
【０００３】[0003]
【発明が解決しようとする課題】しかし、保護皮膜の形
成には長時間を要し、また通水初期段階においては保護
皮膜の厚みが薄く、耐食性は十分には得られず、さらに
冷却水中に第１鉄イオンを注入することは、自然環境に
対し好ましくない。However, it takes a long time to form the protective film, and the thickness of the protective film is small at the initial stage of water penetration, the corrosion resistance is not sufficiently obtained, and the protective film is formed in cooling water. Implanting ferrous ions is undesirable for the natural environment.
【０００４】本発明の目的は、耐食性が優れていると共
に、強度及び熱伝導性も優れ、長寿命を有する熱交換器
用伝熱管を提供することにある。[0004] It is an object of the present invention to provide a heat exchanger tube for a heat exchanger having excellent corrosion resistance, excellent strength and thermal conductivity, and a long life.
【０００５】[0005]
【課題を解決するための手段】本発明の熱交換器用伝熱
管は、銅合金からなる管外側部本体と、この管本体にオ
ーステナイト系ステンレス単結晶鋼からなる管内側部を
挿入し、拡散接合した複合材で構成され、放熱性及び耐
食性に優れることを特徴とする。According to the heat transfer tube for a heat exchanger of the present invention, a tube outer portion made of a copper alloy and a tube inner portion made of austenitic stainless single crystal steel are inserted into the tube body, and diffusion bonding is performed. It is characterized by having excellent heat dissipation and corrosion resistance.
【０００６】本発明は、無酸素銅からなる管外側部本体
及びオーステナイト系ステンレス単結晶鋼からなる管内
側部の複合材で構成され、放熱性及び耐食性に優れるこ
とを特徴とする熱交換器の伝熱管用合金管にある。The present invention relates to a heat exchanger comprising a composite material of a tube outer portion made of oxygen-free copper and a tube inner portion made of austenitic stainless steel single crystal steel and having excellent heat dissipation and corrosion resistance. In alloy tubes for heat transfer tubes.
【０００７】本発明は、銅合金からなる管外側部本体及
びオーステナイト系ステンレス単結晶鋼からなる管内側
部の複合材で構成され、放熱性及び耐食性に優れること
を特徴とする熱交換器の伝熱管用合金管にある。The present invention is directed to a heat exchanger which comprises a composite material of a tube outer portion main body made of a copper alloy and a tube inner portion made of austenitic stainless steel single crystal steel, and is excellent in heat dissipation and corrosion resistance. In alloy tubes for heat pipes.
【０００８】本発明は、銅合金からなる管外側部本体及
び重量でＣ：０.２％以下，Ｎ：0.5％以下，Ｓｉ：１％
以下，Ｐ：０.０４０％以下，Ｓ：０.０３０％以下，Ｍ
ｎ：２.０％以下，Ｍｏ：５.０％以下，Ｎｉ：９〜２１
％及びＣｒ：１５〜２６％を含有し、室温でオーステナ
イト単結晶相及び１０％以下のフェライト相を有するオ
ーステナイト系ステンレス単結晶鋼からなる管内側部の
複合材で構成され、放熱性及び耐食性に優れることを特
徴とする熱交換器の伝熱管用合金管にある。According to the present invention, an outer tube body made of a copper alloy and C: 0.2% or less, N: 0.5% or less, Si: 1% by weight.
Hereinafter, P: 0.040% or less, S: 0.030% or less, M
n: 2.0% or less, Mo: 5.0% or less, Ni: 9 to 21
% And Cr: 15 to 26%, and is composed of a composite material inside the tube made of austenitic stainless steel single crystal steel having an austenitic single crystal phase and a ferrite phase of 10% or less at room temperature. An alloy tube for a heat exchanger tube of a heat exchanger characterized by being excellent.
【０００９】本発明は、円筒形状である銅合金の内側
に、円筒形状である鋼を挿入し、圧力下にて銅合金及び
鋼を拡散接合する放熱性及び耐食性に優れた熱交換器の
伝熱管用合金管の製造方法である。According to the present invention, there is provided a heat exchanger having excellent heat dissipation and corrosion resistance in which a cylindrical steel is inserted into a cylindrical copper alloy, and the copper alloy and the steel are diffusion bonded under pressure. This is a method for manufacturing an alloy tube for a heat tube.
【００１０】本発明は、円筒形状である銅合金の内側
に、インサート材及び円筒形状である鋼を挿入し、圧力
下にて銅合金及び鋼を拡散接合する放熱性及び耐食性に
優れた熱交換器の伝熱管用合金管の製造方法である。According to the present invention, there is provided a heat exchange excellent in heat dissipation and corrosion resistance in which an insert material and a steel having a cylindrical shape are inserted into a copper alloy having a cylindrical shape and the copper alloy and the steel are diffusion-bonded under pressure. This is a method for manufacturing an alloy tube for a heat transfer tube of a vessel.
【００１１】本発明が解決しようとする伝熱管の腐食
は、銅合金そのものの耐食性に原因があり、次に示すよ
うに本発明者らは、銅合金製の管外側部本体にオーステ
ナイト系ステンレス単結晶鋼製の管内側部を拡散接合し
複合材とすることにより、放熱性及び耐食性に優れてい
ることを発見した。[0011] The corrosion of the heat transfer tube to be solved by the present invention is caused by the corrosion resistance of the copper alloy itself. As shown below, the present inventors set the austenitic stainless steel single piece on the copper alloy outer tube main body. It has been found that by diffusing the inside of the tube made of crystalline steel to form a composite material, the heat dissipation and corrosion resistance are excellent.
【００１２】化学組成を調整し、内面粗さを０.１μｍ
以下とした銅合金製パイプの内側に、化学組成を調整
し、表面粗さを０.１μｍ 以下としたオーステナイト系
ステンレス単結晶鋼製パイプを挿入し二重パイプとした
後、接合圧力：３０〜７０ＭＰａ，接合温度：６００〜
９００℃で拡散接合する。このとき接合温度はステンレ
ス製パイプの再結晶温度以下の６００〜８００℃の温度
範囲が好ましい。また、銅合金製パイプとステンレス製
パイプの間に無酸素銅のインサート材を挿入すると、拡
散接合性が向上する。また、拡散接合の前工程として、
二重パイプの界面の密着製をマンドレルミルにより高め
ることも、拡散接合性を向上させる。The chemical composition is adjusted so that the inner surface roughness is 0.1 μm.
An austenitic stainless steel single crystal steel pipe having a chemical composition adjusted to a surface roughness of 0.1 μm or less is inserted into a copper alloy pipe having a diameter of less than 0.1 μm to form a double pipe. 70MPa, joining temperature: 600 ~
Diffusion bonding is performed at 900 ° C. At this time, the joining temperature is preferably in the range of 600 to 800 ° C. which is lower than the recrystallization temperature of the stainless steel pipe. In addition, when an oxygen-free copper insert material is inserted between the copper alloy pipe and the stainless steel pipe, the diffusion bonding property is improved. Also, as a pre-process of diffusion bonding,
Increasing the adhesion at the interface of the double pipe with a mandrel mill also improves diffusion bonding.
【００１３】以上のように、熱交換器用の銅合金製伝熱
管の内面をオーステナイト系ステンレス単結晶鋼とする
ことで、放熱性に優れ、さらに伝熱管の腐食を防止する
ことができる。As described above, since the inner surface of the copper alloy heat transfer tube for the heat exchanger is made of austenitic stainless steel single crystal steel, the heat dissipation is excellent and the heat transfer tube can be prevented from being corroded.
【００１４】次に本発明の伝熱管の内側部の鋼中合金元
素の含有量の限定理由を説明する。Ｃｒはステンレス鋼
表面に不動態皮膜を生成させて耐食性を向上させるうえ
で必要不可欠な元素であり、１５％以上の添加が必要で
ある。しかし２６％以上を越える多量のＣｒの添加は、
加工性が大きく低下し、さらにσ相が形成されるので、
材質が脆くなる。特に、オーステナイト相の安定化を考
慮し、Ｎｉ量に依存したオーステナイト相の安定化の範
囲内で１５〜２６％とし、特に、１６〜２５％が好まし
い。Next, the reason for limiting the content of the alloy element in the steel inside the heat transfer tube of the present invention will be described. Cr is an indispensable element for forming a passivation film on the surface of stainless steel to improve corrosion resistance, and it is necessary to add 15% or more. However, the addition of a large amount of Cr exceeding 26% or more
Since the workability is greatly reduced and the σ phase is formed,
The material becomes brittle. In particular, in consideration of the stabilization of the austenite phase, the content is set to 15 to 26%, and particularly preferably 16 to 25%, within the range of stabilization of the austenite phase depending on the amount of Ni.
【００１５】Ｎｉは、オーステナイト相を安定にし、さ
らに耐食性の向上に有効な元素であり、８％以上含有さ
せる。高Ｎｉ量は、例えば、原子炉炉内に本発明が使用
される時、同一の腐食環境下では化学組成が相違するこ
とで他の部材との接触部で電気化学反応が生じ、腐食を
促進させることになる。原子炉炉内に多く使用されるＳ
ＵＳ３０４，SUS316及びそれらのＬ材を考慮し、Ｃｒ量
との関連から判断して重量で８〜２２％とし、特に、９
〜２１％が好ましい。Ni is an element which stabilizes the austenite phase and is effective for improving the corrosion resistance, and is contained at 8% or more. High Ni content, for example, when the present invention is used in a nuclear reactor, under the same corrosive environment, due to the difference in chemical composition, an electrochemical reaction occurs at the contact portion with other members and accelerates corrosion Will be. S commonly used in nuclear reactors
Considering US 304, SUS 316 and their L materials, the weight is 8 to 22%, judging from the relation with the amount of Cr.
~ 21% is preferred.
【００１６】Ｓｉ，Ｍｎは脱酸剤として添加される。ま
たＭｎは脱硫剤として添加される。市販SUS304，SUS316
及びそれらのＬ材に準じてＳｉは重量で１％以下、Ｍｎ
は重量で２％以下含有させる。特に、Ｓｉは０.０５〜
０.６％が好ましい。Ｍｎは０.０１〜１.５％が好まし
い。Si and Mn are added as deoxidizing agents. Mn is added as a desulfurizing agent. Commercially available SUS304, SUS316
And 1% or less by weight of Si according to their L materials, Mn
Is contained by 2% or less by weight. In particular, Si
0.6% is preferred. Mn is preferably 0.01 to 1.5%.
【００１７】Ｍｏは一層の耐食性、特に耐孔食性の向上
に有効な元素であり、さらに固溶強化から必要な成分で
ある。しかし、５％を越える添加量は必要ではなく、そ
れ以上ではσ相の形成要因となりうる。Mo is an element effective for improving corrosion resistance, particularly pitting corrosion resistance, and is a necessary component for solid solution strengthening. However, the addition amount exceeding 5% is not necessary, and if it is more than 5%, it may be a factor of forming the σ phase.
【００１８】Ｃは、強度上昇に極めて有効な元素であ
り、伝熱管本体の銅合金製部分の強度を補ううえで必要
不可欠な元素であるが、０.２％ 以上では過剰炭化物の
生成及び粗大化で強度が上昇し過ぎると共に、伸びの低
下等が問題となる。さらにＣは、一般に耐食性にとって
有害であり、含有量は少ないほうがよい。C is an extremely effective element for increasing the strength, and is an essential element for compensating the strength of the copper alloy portion of the heat transfer tube main body. In addition to the excessive increase in strength due to the formation, reduction in elongation and the like become problems. Further, C is generally detrimental to corrosion resistance, and the smaller the content, the better.
【００１９】Ｎは、マトリックスに固溶し、強化に必要
であり、重量で０.５％ 以下含むことができる。特に、
０.０５〜０.３％が好ましい。しかしながら、Ｎの添加
量は、加工性を低下させる傾向があるため、本発明では
添加しなくてもよい。N forms a solid solution in the matrix and is necessary for strengthening, and can contain up to 0.5% by weight. Especially,
0.05-0.3% is preferred. However, the addition amount of N does not need to be added in the present invention because the workability tends to decrease.
【００２０】また、本発明の伝熱管内側鋼は、０.５％
以下の不可避不純物を含有する。Further, the steel inside the heat transfer tube of the present invention is 0.5%
It contains the following unavoidable impurities.
【００２１】オーステナイト相は、環境に対して安定な
組織であり、またオーステナイト相にフェライト相が１
０％以下存在することができるが、全オーステナイト相
とすることが望ましい。The austenite phase has a structure that is stable to the environment.
Although it can be present in an amount of 0% or less, it is desirable to have the entire austenite phase.
【００２２】[0022]
（実施例）本発明の熱交換器の伝熱管用合金管及びその
作製方法について、その一実施例として次に説明する。
表１には、本発明の伝熱管本体外側部である銅合金の化
学組成を、また表２には、内側部であるステンレス単結
晶鋼の化学組成をそれぞれ示す。(Embodiment) An alloy tube for a heat exchanger tube of a heat exchanger according to the present invention and a method for manufacturing the same will be described below as an embodiment thereof.
Table 1 shows the chemical composition of the copper alloy which is the outer portion of the heat transfer tube main body of the present invention, and Table 2 shows the chemical composition of the stainless single crystal steel which is the inner portion.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【表２】 [Table 2]
【００２５】次に、銅合金Ｄ１及びＤ２，ステンレス単
結晶鋼Ｓ１及びＳ２を用い機械加工によりパイプ形状と
し、銅合金製パイプの内面粗さ及びステンレス製パイプ
の表面粗さを０.０６μｍ 以下とした。このとき、銅合
金製パイプの内径とステンレス製パイプの外径を同じと
した。この後、図１に示すように銅合金製パイプ１の内
側にステンレス製パイプ２を挿入して二重パイプとし、
マンドレルミルを用いて両パイプの密着性を高めた。次
に、両単面３及び４の銅合金製パイプ１とステンレス製
パイプ２の界面５を溶接し、さらに界面３の溶接部の一
部に炭素鋼製のパイプ６を溶接し、界面５にあるガスを
脱気した後、パイプ６を封止した。次に、二重パイプを
ＨＩＰして、界面を拡散接合により接合し、複合合金管
とした。ＨＩＰ条件は、温度が８００℃，圧力が４９Ｍ
Ｐａで、加圧時間を６０分とした。Next, the copper alloys D1 and D2, stainless steel single crystal steels S1 and S2 were machined into a pipe shape, and the inner surface roughness of the copper alloy pipe and the surface roughness of the stainless steel pipe were reduced to 0.06 μm or less. did. At this time, the inner diameter of the copper alloy pipe and the outer diameter of the stainless steel pipe were the same. Thereafter, as shown in FIG. 1, a stainless steel pipe 2 is inserted inside the copper alloy pipe 1 to form a double pipe,
The adhesion of both pipes was increased using a mandrel mill. Next, the interface 5 between the copper alloy pipe 1 and the stainless steel pipe 2 on both surfaces 3 and 4 is welded, and a carbon steel pipe 6 is welded to a part of the welded portion of the interface 3 to form the interface 5. After degassing a certain gas, the pipe 6 was sealed. Next, the double pipe was HIPed, and the interface was bonded by diffusion bonding to obtain a composite alloy pipe. The HIP condition is as follows: temperature is 800 ° C., pressure is 49M.
At Pa, the pressurization time was 60 minutes.
【００２６】表３は、界面３の接合強度を図２に示す引
張試験片を用いて、公称歪み速度０.２（／分）で室温
にて引張試験を行い評価した結果である。Table 3 shows the results obtained by performing a tensile test at room temperature at a nominal strain rate of 0.2 (/ min) using the tensile test piece shown in FIG.
【００２７】[0027]
【表３】 [Table 3]
【００２８】次に、本発明合金管を用いて（Ａ）アルカ
リＳＣＣ試験、（Ｂ）孔食試験を行った。Next, (A) an alkaline SCC test and (B) a pitting corrosion test were performed using the alloy tube of the present invention.
【００２９】（Ａ）アルカリＳＣＣ試験 銅合金及びステンレス単結晶鋼から板を切り出し、それ
ぞれ表面粗さを0.06μｍ以下とした。つぎに銅合金板及
びステンレス板を拡散接合条件と同様の条件で接合し複
合板とした。次に、複合板から、厚さ２mm，幅１０mm，
長さ５０mmのＳＣＣ試験片を準備した。このとき、接合
界面は試験片の厚さ方向に対して９０度とした。ＳＣＣ
の試験方法として有用なＣＢＢ試験の方法を、図３に示
す。試験片２１にすきまを付けるためのグラファイトフ
ァイバウール２２とともにホルダ２３間にはさみつけ、
ボルト穴２４にボルトを挿入し、ホルダ２３間にアール
をつけて締めつけ、オートクレーブ中で応力腐食割れ試
験に供した。試験条件は、３５０℃の脱気した５０％の
ＮａＯＨ水溶液中で１０００時間浸漬した。その後試験
片を取り出し、試験片の断面観察から割れ発生の有無を
調べた結果、本発明の全ての試験片には全く割れは観察
されず、高い応力腐食割れ性を示した。(A) Alkali SCC Test A plate was cut out from a copper alloy and a stainless steel single crystal steel, and each had a surface roughness of 0.06 μm or less. Next, a copper alloy plate and a stainless steel plate were joined under the same conditions as the diffusion joining conditions to obtain a composite plate. Next, from the composite board, thickness 2mm, width 10mm,
An SCC test piece having a length of 50 mm was prepared. At this time, the bonding interface was 90 degrees with respect to the thickness direction of the test piece. SCC
FIG. 3 shows a CBB test method that is useful as a test method for the test. With a graphite fiber wool 22 for providing a gap in the test piece 21, sandwiched between the holders 23,
A bolt was inserted into the bolt hole 24, a round was formed between the holders 23 and tightened, and subjected to a stress corrosion cracking test in an autoclave. The test conditions were immersion in a degassed 50% NaOH aqueous solution at 350 ° C. for 1000 hours. Thereafter, the test piece was taken out, and the presence or absence of cracks was examined by observing the cross section of the test piece. As a result, no crack was observed in any of the test pieces of the present invention, and high stress corrosion cracking property was exhibited.
【００３０】（Ｂ）孔食試験 複合板から、厚さ２mm，幅３０mm，長さ４０mmの試験片
を準備し、エメリー紙で１５００番まで研磨した後、５
００ppmの塩化物イオンを含む４％のＮa2ＳＯ4脱気水溶
液中に１０００時間浸漬した。その後試験片を取り出
し、試験片の表面観察から孔食発生の有無を調べた結
果、本発明の全ての試験片には孔食がわずかに観察され
るだけであり、耐孔食性は十分に得られた。(B) Pitting corrosion test A test piece having a thickness of 2 mm, a width of 30 mm, and a length of 40 mm was prepared from the composite plate, polished to # 1500 with emery paper, and then polished.
It was immersed in a 4% Na 2 SO 4 degassed aqueous solution containing 00 ppm of chloride ions for 1000 hours. Thereafter, the test piece was taken out, and the presence or absence of pitting corrosion was examined by observing the surface of the test piece.As a result, only slight pitting was observed on all the test pieces of the present invention, and sufficient pitting corrosion resistance was obtained. Was done.
【００３１】[0031]
【発明の効果】本発明の合金管は高い強度を示すと共
に、耐食性に優れる。また実施例からもわかる通り、耐
アルカリＳＣＣ性，耐孔食性にも優れたものであり、熱
交換器の伝熱管用合金管として長寿命化，耐自然環境性
が向上する。The alloy pipe of the present invention has high strength and excellent corrosion resistance. Further, as can be seen from the examples, it is also excellent in alkali SCC resistance and pitting corrosion resistance, and has a long life and an improved natural environment resistance as a heat transfer tube alloy tube of a heat exchanger.
【図１】本発明の実施例である銅合金製パイプの内側に
ステンレス製パイプを挿入した二重パイプを示す斜視
図。FIG. 1 is a perspective view showing a double pipe in which a stainless steel pipe is inserted inside a copper alloy pipe according to an embodiment of the present invention.
【図２】本発明の実施例である複合合金管から採取した
引張試験片を示す斜視図。FIG. 2 is a perspective view showing a tensile test piece collected from a composite alloy tube according to an example of the present invention.
【図３】応力腐食割れ試験方法を示す斜視図。FIG. 3 is a perspective view showing a stress corrosion cracking test method.
１…銅合金製パイプ、２…ステンレス製パイプ、３，４
…端面、５…界面、６…脱気用パイプ。1: Copper alloy pipe, 2: Stainless steel pipe, 3, 4
... End face, 5 ... Interface, 6 ... Pipe for deaeration.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 金田 潤也 茨城県日立市大みか町七丁目１番１号 株 式会社日立製作所日立研究所内 (72)発明者 青野 泰久 茨城県日立市大みか町七丁目１番１号 株 式会社日立製作所日立研究所内 (72)発明者 児玉 英世 茨城県日立市大みか町七丁目１番１号 株 式会社日立製作所日立研究所内 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Junya Kaneda 7-1-1, Omikacho, Hitachi City, Ibaraki Prefecture Inside the Hitachi Research Laboratory, Hitachi, Ltd. (72) Inventor Yasuhisa Aono 7-1 Omikacho, Hitachi City, Ibaraki Prefecture No. 1 Hitachi, Ltd. Hitachi Research Laboratories (72) Inventor Hideyo Kodama 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture Inside Hitachi Ltd. Hitachi Research Laboratory
Claims (5)
無酸素銅からなる管外側部本体及びオーステナイト系ス
テンレス単結晶鋼からなる管内側部の複合材で構成さ
れ、放熱性及び耐食性に優れることを特徴とする熱交換
器の伝熱管用合金管。1. A heat exchanger tube for a heat exchanger, wherein the heat exchanger tube is composed of a composite material of a tube outer portion body made of oxygen-free copper and a tube inner portion made of austenitic stainless steel single crystal steel. Alloy tube for heat exchanger tube of heat exchanger, characterized by excellent properties.
銅合金からなる管外側部本体及びオーステナイト系ステ
ンレス単結晶鋼からなる管内側部の複合材で構成され、
放熱性及び耐食性に優れることを特徴とする熱交換器の
伝熱管用合金管。2. The heat exchanger tube of a heat exchanger, wherein the heat exchanger tube is composed of a composite material of a tube outer portion body made of a copper alloy and a tube inner portion made of austenitic stainless single crystal steel.
An alloy tube for a heat exchanger tube of a heat exchanger, which is excellent in heat dissipation and corrosion resistance.
銅合金からなる管外側部本体及び重量でＣ：０.２％以
下，Ｎ：０.５％以下，Ｓｉ：１％以下，Ｐ：０.０４０
％ 以下，Ｓ：０.０３０％以下，Ｍｎ：２.０％以下，
Ｍｏ：５.０％以下 ，Ｎｉ：９〜２１％及びＣｒ：１５
〜２６％を含有し、室温でオーステナイト単結晶相及び
１０％以下のフェライト相を有するオーステナイト系ス
テンレス単結晶鋼からなる管内側部の複合材で構成さ
れ、放熱性及び耐食性に優れることを特徴とする熱交換
器の伝熱管用合金管。3. The heat exchanger tube of a heat exchanger, wherein the heat exchanger tube is made of a copper alloy and has a tube outer body and a weight of C: 0.2% or less, N: 0.5% or less, Si: 1% or less, P: 0.040
%, S: 0.030% or less, Mn: 2.0% or less,
Mo: 5.0% or less, Ni: 9 to 21%, and Cr: 15
It is composed of an austenitic stainless steel single crystal steel having an austenitic single crystal phase and a ferrite phase of 10% or less at room temperature, and is composed of a composite material on the inner side of the tube, and has excellent heat dissipation and corrosion resistance. Alloy tubes for heat transfer tubes in heat exchangers.
である前記銅合金の内側に、円筒形状である前記鋼を挿
入し、圧力下にて前記銅合金及び前記鋼を拡散接合する
放熱性及び耐食性に優れた熱交換器の伝熱管用合金管の
製造方法。4. The heat radiation according to claim 1, wherein said cylindrical steel is inserted inside said cylindrical copper alloy, and said copper alloy and said steel are diffusion bonded under pressure. Of manufacturing alloy tubes for heat transfer tubes of heat exchangers having excellent heat resistance and corrosion resistance.
である前記銅合金の内側に、インサート材及び円筒形状
である前記鋼を挿入し、圧力下にて前記銅合金及び前記
鋼を拡散接合する放熱性及び耐食性に優れた熱交換器の
伝熱管用合金管の製造方法。5. The copper alloy according to claim 1, 2 or 3, wherein an insert material and the steel having a cylindrical shape are inserted into the copper alloy having a cylindrical shape, and the copper alloy and the steel are diffused under pressure. A method for manufacturing an alloy tube for a heat exchanger tube of a heat exchanger having excellent heat dissipation and corrosion resistance to be joined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP434197A JPH10197193A (en) | 1997-01-14 | 1997-01-14 | Alloy tube for heat transfer tube of heat exchanger and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP434197A JPH10197193A (en) | 1997-01-14 | 1997-01-14 | Alloy tube for heat transfer tube of heat exchanger and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10197193A true JPH10197193A (en) | 1998-07-31 |
Family
ID=11581743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP434197A Pending JPH10197193A (en) | 1997-01-14 | 1997-01-14 | Alloy tube for heat transfer tube of heat exchanger and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10197193A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014041001A (en) * | 2007-05-31 | 2014-03-06 | Amerifab Inc | Adjustable heat exchanger and use method |
| CN106440912A (en) * | 2015-08-07 | 2017-02-22 | 江苏信换热器科技有限公司 | Stainless steel high throughput pipe and manufacturing process thereof |
-
1997
- 1997-01-14 JP JP434197A patent/JPH10197193A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014041001A (en) * | 2007-05-31 | 2014-03-06 | Amerifab Inc | Adjustable heat exchanger and use method |
| CN106440912A (en) * | 2015-08-07 | 2017-02-22 | 江苏信换热器科技有限公司 | Stainless steel high throughput pipe and manufacturing process thereof |
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