JP2008231486A - Alloy application method, brazing material application method, and manufacturing method of heat exchanger - Google Patents

Alloy application method, brazing material application method, and manufacturing method of heat exchanger Download PDF

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JP2008231486A
JP2008231486A JP2007071174A JP2007071174A JP2008231486A JP 2008231486 A JP2008231486 A JP 2008231486A JP 2007071174 A JP2007071174 A JP 2007071174A JP 2007071174 A JP2007071174 A JP 2007071174A JP 2008231486 A JP2008231486 A JP 2008231486A
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brazing
powder
alloy
base
ductile
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Yohei Sakakibara
洋平 榊原
Koki Yoshizawa
廣喜 吉澤
Tomotoshi Mochizuki
智俊 望月
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Ihi Corp
株式会社Ihi
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    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C24/00Coating starting from inorganic powder
    • C23C24/02Coating starting from inorganic powder by application of pressure only
    • C23C24/04Impact or kinetic deposition of particles

Abstract

<P>PROBLEM TO BE SOLVED: To propose an alloy application method, a brazing material application method and manufacturing method of heat exchanger, capable of applying a brazing material etc., without exerting a thermal influence on metallic members (base materials). <P>SOLUTION: The method of applying the brazing material for joining the metallic members B, B2 of the same kinds or different kinds to each other to at least either one includes jetting an ordinary temperature or heated high pressure gas G and brazing material powder A at a supersonic velocity to bring the brazing material powder A, without melting, into collision against the metallic powder B to form the brazing material film R. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、合金塗布方法、ロウ材塗布方法、熱交換器の製造方法に関する。   The present invention relates to an alloy coating method, a brazing material coating method, and a heat exchanger manufacturing method.
同種又は異種の金属部材同士を接合する方法として、金属部材同士の接合部に溶融したロウ材を流し込んでロウ付けする技術が古くから知られている。また、接合される金属部材の一方又は両方に予めロウ材を付着(塗布)しておき、金属部材同士を密着させた状態で加熱して付着させたロウ材を溶融することでロウ付けする技術も知られている。
金属部材(基材)の一方又は両方に予めロウ材を付着(塗布)させる方法としては、メッキ法、高温溶射法(プラズマ溶射法等)、ロウ材粉末を基材と共に圧延して付着させる方法(特許文献1)、シート状に形成したロウ材シートを基材に貼り付ける方法(特許文献2)等がある。
特開2004−25251号公報 特開2004−82218号公報
As a method for joining metal members of the same type or different types, a technique for casting and brazing a molten brazing material into a joint portion between metal members has been known for a long time. In addition, a brazing material is preliminarily attached (applied) to one or both of the metal members to be joined, and brazing is performed by melting the brazing material that is heated and adhered while the metal members are in close contact with each other. Is also known.
As a method of attaching (applying) the brazing material to one or both of the metal members (base materials) in advance, a plating method, a high temperature spraying method (plasma spraying method, etc.), a method of attaching the brazing material powder by rolling together with the base material. (Patent Document 1), a method of attaching a brazing material sheet formed in a sheet shape to a substrate (Patent Document 2), and the like.
JP 2004-25251 A JP 2004-82218 A
しかしながら、メッキ法の場合には、基材にロウ材を付着させるのに長時間を要する、また、ロウ材を均一に付着させることが困難である場合が少なくないという問題がある。
高温溶射法では、基材が熱影響を受けて変形してしまうという問題がある。すなわち、基材を機械加工した後に、ロウ材を高温溶射法で塗布すると、熱変形の影響で基材に寸法ずれが発生してしまう場合がある。更に、ロウ材の材料組織に、意図せぬ偏析や第二相の析出が発生してしまうという問題もある。
ロウ材粉末を基材と共に圧延したり、シート状に形成する方法では、粉末の粒子径や含水率が大きく製造性に関わり、その制御が難しい、また、粉末圧延装置の導入コストが大きい、更に、板材にしかロウ材を付着(塗布)させることができない、という問題がある。
However, in the case of the plating method, it takes a long time to attach the brazing material to the base material, and there are many problems that it is difficult to uniformly adhere the brazing material.
In the high temperature spraying method, there is a problem that the base material is deformed due to thermal influence. That is, if the brazing material is applied by a high temperature spraying method after the base material is machined, a dimensional shift may occur in the base material due to thermal deformation. Furthermore, there is also a problem that unintended segregation or precipitation of the second phase occurs in the material structure of the brazing material.
In the method of rolling the brazing powder together with the base material or forming it into a sheet shape, the powder particle size and water content are large, which is related to manufacturability and difficult to control, and the introduction cost of the powder rolling device is high. There is a problem that the brazing material can be attached (applied) only to the plate material.
本発明は、上述した事情に鑑みてなされたもので、金属部材(基材)に熱影響を与えることなくロウ材等を塗布することができる合金塗布方法、ロウ材塗布方法及び熱交換器の製造方法を提案することを目的とする。   The present invention has been made in view of the above-described circumstances. An alloy coating method, a brazing material coating method, and a heat exchanger that can apply a brazing material and the like without affecting the metal member (base material). The object is to propose a manufacturing method.
本発明に係る合金塗布方法、ロウ材塗布方法、熱交換器の製造方法では、上記課題を解決するために以下の手段を採用した。
第1の発明は、延性材料と脆性材料を含む合金を基材上に塗布する塗布方法であって、常温又は加熱した高圧ガスと材料粉末とをノズルから超音速で噴射し、前記材料粉末を融解させることなく前記基材に衝突させて合金皮膜を形成することを特徴とする。
In the alloy coating method, the brazing material coating method, and the heat exchanger manufacturing method according to the present invention, the following means are employed in order to solve the above problems.
1st invention is the coating method which apply | coats the alloy containing a ductile material and a brittle material on a base material, spraying normal temperature or the heated high-pressure gas and material powder at a supersonic speed from a nozzle, The alloy film is formed by colliding with the base material without melting.
また、前記材料粉末は、延性材料及び脆性材料からなる合金粉末であることを特徴とする。
また、前記材料粉末は、延性材料からなる第一粉末及び脆性材料からなる第二粉末であり、前記基材に前記第一粉末を衝突させて延性材料皮膜を形成した後に、前記延性材料皮膜に対して前記第二粉末を衝突させて前記合金皮膜を形成することを特徴とする。
Further, the material powder is an alloy powder made of a ductile material and a brittle material.
The material powder is a first powder made of a ductile material and a second powder made of a brittle material. After the ductile material film is formed by colliding the first powder with the base material, On the other hand, the alloy powder is formed by colliding the second powder.
第2の発明は、同種又は異種の金属部材同士を接合するロウ材を前記金属部材の少なくとも一方に対して塗布するロウ材塗布方法であって、常温又は加熱した高圧ガスとロウ材粉末とをノズルから超音速で噴射し、前記ロウ材粉末を融解させることなく前記金属部材に衝突させてロウ材皮膜を形成することを特徴とする。   A second invention is a brazing material coating method in which a brazing material for joining the same or different kinds of metal members is applied to at least one of the metallic members, and includes a normal temperature or heated high pressure gas and brazing material powder. It is characterized in that a brazing material film is formed by jetting at a supersonic speed from a nozzle and colliding with the metal member without melting the brazing material powder.
第3の発明は、複数の波箔同士又は複数の波箔と平箔とをロウ材を用いて接合する工程を含む熱交換器の製造方法であって、前記平箔及び/又は前記波箔に前記ロウ材を塗布する方法として、第2の発明に係るロウ材塗布方法を用いることを特徴とする。   3rd invention is a manufacturing method of the heat exchanger including the process of joining several corrugated foils or several corrugated foils and flat foil using brazing material, Comprising: Said flat foil and / or said corrugated foil The brazing material coating method according to the second invention is used as a method for coating the brazing material.
本発明によれば以下の効果を得ることができる。
常温又は加熱した高圧ガスと材料粉末とをノズルから超音速で噴射するコールドスプレーを用いて、材料粉末を基材に対して塗布・付着させるので、比較的容易、かつ、基材及び材料粉末(ロウ材等)に酸化や熱の影響を与えることなく、ロウ付を行うことができる。また、合金粉末や、複数の粉末を混合した混合粉を、付着させることができる。
According to the present invention, the following effects can be obtained.
Since the material powder is applied and adhered to the base material using a cold spray in which normal temperature or heated high-pressure gas and material powder are injected from the nozzle at supersonic speed, it is relatively easy and the base material and the material powder ( Brazing can be performed without oxidizing or brazing the brazing material or the like. Moreover, alloy powder or mixed powder obtained by mixing a plurality of powders can be adhered.
また、基材に延性材料からなる皮膜を形成した後に、脆性材料からなる粉末を吹きつけることで、脆性材料を基材上に良好に塗布・付着させることができる。このようにして作製した皮膜は下地に延性を有し、表面が脆性であるので、ハニカム等に適用すればシール性を上げることができる。   Moreover, after forming the film | membrane which consists of a ductile material on a base material, the brittle material can be favorably apply | coated and adhered on a base material by spraying the powder which consists of a brittle material. Since the film thus produced has ductility in the base and the surface is brittle, when applied to a honeycomb or the like, the sealing property can be improved.
また、コールドスプレーを用いるので、複雑形状の部材にも付着させることができる。すなわち局所的な施工が可能である。また、必要な範囲(領域)にのみ合金やロウ材を塗布・付着させることができるので、合金やロウ材の量を最小限に抑えることができる。したがって、熱交換器等の製造コストの低減を図ることができる。   Moreover, since a cold spray is used, it can be attached to a member having a complicated shape. That is, local construction is possible. Further, since the alloy or brazing material can be applied and adhered only in a necessary range (region), the amount of the alloy or brazing material can be minimized. Therefore, it is possible to reduce the manufacturing cost of the heat exchanger and the like.
以下、本発明に係る合金塗布方法、ロウ材塗布方法、熱交換器の製造方法の実施形態について、図面を参照して説明する。   Hereinafter, embodiments of an alloy coating method, a brazing material coating method, and a heat exchanger manufacturing method according to the present invention will be described with reference to the drawings.
〔ロウ材塗布装置〕
図1は、コールドスプレー装置の概略を示す模式図である。
コールドスプレー装置10は、材料粉末Fを超音速で基材Bの表面に固体状態で衝突させて皮膜Rを成膜するための装置であって、材料粉末Fを高圧の作動ガスGと共に噴射するスプレーガン11、所望量の材料粉末Fを高圧ガスと共にスプレーガン11に供給する粉末供給部12、作動ガスGを所定温度に加熱してスプレーガン11に供給するガス加熱器13、粉末供給部12及びガス加熱器13に対して作動ガスGを供給する不図示のガス供給部14等を備えている。
[Brass coating equipment]
FIG. 1 is a schematic diagram showing an outline of a cold spray apparatus.
The cold spray apparatus 10 is an apparatus for forming a coating R by causing the material powder F to collide with the surface of the base material B at a supersonic speed in a solid state, and jets the material powder F together with a high-pressure working gas G. The spray gun 11, a powder supply unit 12 that supplies a desired amount of the material powder F together with the high-pressure gas to the spray gun 11, a gas heater 13 that heats the working gas G to a predetermined temperature and supplies it to the spray gun 11, and a powder supply unit 12 And a gas supply unit 14 (not shown) for supplying the working gas G to the gas heater 13.
ガス供給部14から供給される高圧の作動ガスGは2つの経路に分岐され、一方の作動ガスG1はガス加熱器13を経て、室温以上、材料粉末Fの融点又は軟化温度よりも低い温度に加熱された後、スプレーガン11に供給される。他方の作動ガスG2は、粉末供給部12へ送気され、キャリアガスとして材料粉末Fと共にスプレーガン11に供給される。   The high-pressure working gas G supplied from the gas supply unit 14 is branched into two paths, and one working gas G1 passes through the gas heater 13 to a temperature higher than room temperature and lower than the melting point or softening temperature of the material powder F. After being heated, it is supplied to the spray gun 11. The other working gas G2 is supplied to the powder supply unit 12 and supplied to the spray gun 11 together with the material powder F as a carrier gas.
そして、スプレーガン11に供給された作動ガスG(G1,G2)と材料粉末Fは、スプレーガン11の先端のノズル11Nを経て超音速流となり、ノズル11Nの出口から噴出される。材料粉末Fの吹き付け速度は、300〜800m/s程度である。
なお、高圧ガス(作動ガス)Gとしては、空気、窒素、ヘリウムなどが用いられる。特に、不活性ガス(ヘリウム)が好適である。ガス圧力は、0.27〜0.69MPa程度である。
The working gas G (G1, G2) and the material powder F supplied to the spray gun 11 become a supersonic flow through the nozzle 11N at the tip of the spray gun 11, and are ejected from the outlet of the nozzle 11N. The spraying speed of the material powder F is about 300 to 800 m / s.
As the high pressure gas (working gas) G, air, nitrogen, helium, or the like is used. In particular, an inert gas (helium) is suitable. The gas pressure is about 0.27 to 0.69 MPa.
ノズル11Nの出口から噴出した材料粉末Fは、固体のまま基材Bに衝突する。そして、高速で基材Bに衝突した材料粉末Fは、塑性変形して基材Bに付着(皮膜Rを形成)する。また、材料粉末Fが基材Bに衝突した際に運動エネルギーが熱エネルギーに変わり、材料によっては材料表面が融点を超え結合し強固な密着力を得ることができる。   The material powder F ejected from the outlet of the nozzle 11N collides with the base material B while remaining solid. The material powder F colliding with the base material B at high speed is plastically deformed and adheres to the base material B (forms a coating R). Further, when the material powder F collides with the base material B, the kinetic energy changes to thermal energy, and depending on the material, the material surface exceeds the melting point and can be bonded to obtain a strong adhesion.
このように、コールドスプレー装置10は、材料粉末Fを溶融またはガス化させること無く、作動ガスGと共に超音速流で固相状態のまま基材Bに衝突させて皮膜Rを形成することができる。
従来のプラズマ溶射法、フレーム溶射法、高速フレーム溶射法などに比べ、材料粉末をあまり加熱せずに固相状態のまま基材Bに付着させることができる。
これによって得た皮膜Rは、緻密で密度、熱伝導率・導電性が高い、密着性も良好である等の優れた性質を有する。特に、材料粉末Fを加熱して溶融させないので、酸化や熱変質が殆どないという優れた性質を有する。
As described above, the cold spray device 10 can form the coating R by causing the material powder F to collide with the base material B in a solid state in supersonic flow together with the working gas G without melting or gasifying the material powder F. .
Compared with the conventional plasma spraying method, flame spraying method, high-speed flame spraying method and the like, the material powder can be adhered to the base material B in a solid state without being heated so much.
The film R thus obtained has excellent properties such as denseness, high density, high thermal conductivity / conductivity, and good adhesion. In particular, since the material powder F is not heated and melted, it has an excellent property that there is almost no oxidation or thermal alteration.
〔ロウ材〕
上述した材料粉末Fとしては、異種又は同種の金属部材を接合するために用いられるロウ材の粉末(以下、ロウ材粉末Aという)を用いる。
ロウ材粉末Aは、具体的には、ニッケルロウ(BNi−2,BNi−3,BNi−5,BNi−6等:JIS規格)やリン銅ロウ(BCuP−1,BCuP−2,BCuP−3,BCuP−4,BCuP−5,BCuP−6等:JIS規格)である。
[Wax]
As the material powder F described above, a powder of brazing material (hereinafter referred to as brazing material powder A) used for joining different or similar metal members is used.
Specifically, the brazing material powder A includes nickel brazing (BNi-2, BNi-3, BNi-5, BNi-6, etc .: JIS standard) and phosphor copper brazing (BCuP-1, BCuP-2, BCuP-3). , BCuP-4, BCuP-5, BCuP-6, etc .: JIS standard).
ニッケルロウやリン銅ロウは、それぞれ延性材料と脆性材料を含む合金である。
ニッケルロウやリン銅ロウには、延性材料として、Cu,Ni,Alが含まれている。脆性材料として、Cr,Pが含まれている。
Nickel brazing and phosphor copper brazing are alloys containing a ductile material and a brittle material, respectively.
Nickel brazing and phosphorous copper brazing contain Cu, Ni, and Al as ductile materials. As the brittle material, Cr and P are included.
ロウ材粉末Aは、ニッケルロウやリン銅ロウの合金(延性材料と脆性材料を含む合金)を粉砕(粉末化)したものが用いられる(以下、合金粉末Agと呼ぶ)。
なお、延性材料と脆性材料を含む合金粉末Agの他に、延性材料からなる延性材料粉末A1と脆性材料からなる脆性材料粉末A2を所定の割合で混合した混合粉Amを用いてもよい。
As the brazing material powder A, an alloy of nickel brazing or phosphorous copper brazing (an alloy containing a ductile material and a brittle material) is used (hereinafter referred to as alloy powder Ag).
In addition to the alloy powder Ag containing a ductile material and a brittle material, a mixed powder Am obtained by mixing a ductile material powder A1 made of a ductile material and a brittle material powder A2 made of a brittle material at a predetermined ratio may be used.
〔ロウ材塗布方法〕
以下、基材B上にロウ材を塗布する方法等について説明する。
図2は、本発明の実施形態に係るロウ材塗布方法を工程順に説明する図である。
まず、コールドスプレー装置10の粉末供給部12に、ロウ材粉末A(合金粉末Ag又は混合粉Am)を投入する。そして、ガス供給部14を作動させて、高圧の作動ガスGを粉末供給部12及びガス加熱器13に供給する。すると、スプレーガン11から、ロウ材粉末A(Ag,Am)が超音速で噴射される。
この際、ガス加熱器13は、作動ガスGを、ロウ材粉末Aの融点又は軟化温度よりも低い温度(例えば、650℃以下)に加熱する。
[Brass coating method]
Hereinafter, a method of applying a brazing material on the base material B will be described.
FIG. 2 is a diagram for explaining the brazing material coating method according to the embodiment of the present invention in the order of steps.
First, the brazing powder A (alloy powder Ag or mixed powder Am) is charged into the powder supply unit 12 of the cold spray apparatus 10. Then, the gas supply unit 14 is operated to supply the high-pressure working gas G to the powder supply unit 12 and the gas heater 13. Then, the brazing powder A (Ag, Am) is sprayed from the spray gun 11 at supersonic speed.
At this time, the gas heater 13 heats the working gas G to a temperature (for example, 650 ° C. or less) lower than the melting point or softening temperature of the brazing powder A.
例えば、ステンレス鋼(SUS304等)や銅等の金属材料からなる基材Bに対して、スプレーガン11から噴射されたロウ材粉末A(Ag,Am)を吹き付ける。ロウ材粉末Aは、300〜800m/s程度の速度で基材Bに衝突し、これにより基材B上にロウ材からなる皮膜Rが形成される。   For example, the brazing material powder A (Ag, Am) sprayed from the spray gun 11 is sprayed on the base material B made of a metal material such as stainless steel (SUS304 or the like) or copper. The brazing powder A collides with the base material B at a speed of about 300 to 800 m / s, whereby a coating R made of brazing material is formed on the base material B.
ロウ材の合金からなる合金粉末Agを基材Bに吹き付けた場合には、合金粉末Agと略同一組織を有する皮膜Rが形成される。つまり、皮膜Rには偏析が発生しない。   When the alloy powder Ag made of a brazing alloy is sprayed onto the base material B, a film R having substantially the same structure as the alloy powder Ag is formed. That is, segregation does not occur in the coating R.
そして、スプレーガン11から基材Bに対してロウ材粉末Aを吹き付けつつ、スプレーガン11を基材Bに対して所定速度(例えば、0.13〜63.5m/s程度)で平行移動(走査)させることで、基材B上の任意の範囲(領域)にロウ材からなる皮膜Rを形成(塗布・付着)することができる(図2(a))。
スプレーガン11からロウ材粉末Aを吹き付ける方法では、任意の範囲(領域)にのみロウ材(皮膜R)を塗布・付着することができるので、高温溶射法等を用いる場合に比べて、ロウ材の量を最小限に抑えることができる。
Then, while spraying the brazing material powder A from the spray gun 11 to the base material B, the spray gun 11 is moved parallel to the base material B at a predetermined speed (for example, about 0.13 to 63.5 m / s). By scanning), a film R made of a brazing material can be formed (applied / attached) in an arbitrary range (region) on the base material B (FIG. 2A).
In the method of spraying the brazing material powder A from the spray gun 11, the brazing material (coating R) can be applied and adhered only in an arbitrary range (region), so that the brazing material is compared with the case where the high temperature spraying method or the like is used. The amount of can be minimized.
更に、ロウ材からなる皮膜Rを付着させた基材Bに対して、異種又は同種金属からなる他の部材B2を接合する場合には、まず、基材Bの皮膜R上に部材B2を密着させて仮固定する。
次に、基材Bと部材B2とを密着させた状態で加熱して、皮膜R(すなわちロウ材)を溶融させる(図2(b))。
そして、基材Bと部材B2を自然冷却することで、溶融したロウ材が固化して基材Bと部材B2が接合(ロウ付け)される(図2(c))。
Furthermore, when bonding another member B2 made of a different kind or the same kind of metal to the base material B to which the film R made of brazing material is adhered, first, the member B2 is brought into close contact with the film R of the base material B Let it fix temporarily.
Next, it heats in the state which contact | adhered the base material B and member B2, and fuse | melts the membrane | film | coat R (namely, brazing material) (FIG.2 (b)).
Then, by naturally cooling the base material B and the member B2, the molten brazing material is solidified and the base material B and the member B2 are joined (brazed) (FIG. 2C).
図3は、ロウ材塗布方法の他の実施形態を工程順に説明する図である。
上述したように、ロウ材の合金粉末Agや、延性材料粉末A1と脆性材料粉末A2を所定の割合で混合した混合粉Amを基材Bに対して一度に吹き付ける場合の他、以下の方法を用いることもできる。すなわち、延性材料からなる延性材料粉末A1と脆性材料からなる脆性材料粉末A2を別々に分けて吹き付け(塗布)てもよい。
FIG. 3 is a diagram for explaining another embodiment of the brazing material coating method in the order of steps.
As described above, in addition to the case where the alloy powder Ag of the brazing material or the mixed powder Am obtained by mixing the ductile material powder A1 and the brittle material powder A2 at a predetermined ratio is sprayed on the base material B at once, the following method is used. It can also be used. That is, the ductile material powder A1 made of a ductile material and the brittle material powder A2 made of a brittle material may be separately sprayed (applied).
つまり、まず、延性材料からなる延性材料粉末A1を基材Bに対して吹き付けて延性材料からなる皮膜R1を形成する(図3(a))。
その後に、この皮膜R1上に更に脆性材料からなる脆性材料粉末A2を吹き付けることで、皮膜Rを形成する(図3(b))。
That is, first, ductile material powder A1 made of a ductile material is sprayed onto the base material B to form a film R1 made of a ductile material (FIG. 3A).
Thereafter, a brittle material powder A2 made of a brittle material is further sprayed onto the coat R1, thereby forming the coat R (FIG. 3B).
延性材料からなる皮膜R1と、この皮膜R1に衝突した脆性材料粉末A2とは、それぞれ衝突の際に材料表面が融点を超えて結合する。このため、延性材料からなる延性材料粉末A1と脆性材料からなる脆性材料粉末A2とを別々に基材B上に塗布する場合であっても、合金粉末Agと略同一組織を有する皮膜Rが形成される。
なお、延性材料粉末A1や脆性材料粉末A2を基材Bに対して吹き付ける方法は、上述の場合と同様である。また、延性材料粉末A1と脆性材料粉末A2の割合は、混合粉Amにおける延性材料粉末A1と脆性材料粉末A2の割合と略同一に調整する。具体的には、スプレーガン11からの噴射量及びスプレーガン11の走査速度を調整する。
The film surface R1 made of a ductile material and the brittle material powder A2 colliding with the film R1 are bonded to each other with the material surface exceeding the melting point at the time of collision. Therefore, even when the ductile material powder A1 made of ductile material and the brittle material powder A2 made of brittle material are separately applied on the base material B, a film R having substantially the same structure as the alloy powder Ag is formed. Is done.
In addition, the method of spraying ductile material powder A1 and brittle material powder A2 with respect to the base material B is the same as that of the above-mentioned case. The ratio of the ductile material powder A1 and the brittle material powder A2 is adjusted to be substantially the same as the ratio of the ductile material powder A1 and the brittle material powder A2 in the mixed powder Am. Specifically, the spray amount from the spray gun 11 and the scanning speed of the spray gun 11 are adjusted.
延性材料からなる延性材料粉末A1を最初に塗布し、その後に脆性材料からなる脆性材料粉末A2を塗布するのは、脆性材料を単独で基材B上に付着させることが困難だからである。また、基材B上に付着しやすい延性材料を一旦付着させた後に、この延性材料を媒介として、脆性材料を基材B上に付着させるためである。   The reason why the ductile material powder A1 made of a ductile material is first applied and then the brittle material powder A2 made of a brittle material is applied is because it is difficult to attach the brittle material alone on the substrate B. Further, the ductile material that easily adheres to the base material B is once attached, and then the brittle material is attached to the base material B by using the ductile material as a medium.
そして、更に、ロウ材からなる皮膜Rを付着させた基材Bに対して、異種又は同種金属からなる他の部材B2を接合する場合には、上述した手順と同一の手順を経ればよい。
つまり、基材Bの皮膜R上に部材B2を密着させて仮固定し(図3(c))、その状態で加熱して皮膜Rを溶融させ、自然冷却する(図3(d))。
これにより、溶融したロウ材が固化して基材Bと部材B2が接合(ロウ付け)される。
Furthermore, when joining another member B2 made of a different kind or the same kind of metal to the base material B to which the film R made of brazing material is adhered, the same procedure as described above may be passed. .
That is, the member B2 is brought into close contact with the film R of the base material B and temporarily fixed (FIG. 3C), heated in this state to melt the film R, and naturally cooled (FIG. 3D).
Thereby, the molten brazing material is solidified and the base material B and the member B2 are joined (brazed).
〔熱交換器〕
図4は、本発明の実施形態に係る熱交換器50の主要部の構成を示す模式図である。
熱交換器50は、複数の波板52を、互いの山部分52aが接触するように積層して接合させたものを備えている。
複数の波板52は、冷媒Wと空気Hとの間で効率的に熱伝達を行うために、アルミニウム、銅或いはステンレス鋼等により形成されている。また、複数の波板52は、互いにロウ付けされている。
なお、各波板52同士の間に形成される各空間は、冷媒Wや空気Hの流路となる。
〔Heat exchanger〕
FIG. 4 is a schematic diagram illustrating a configuration of a main part of the heat exchanger 50 according to the embodiment of the present invention.
The heat exchanger 50 includes a plurality of corrugated plates 52 that are stacked and joined such that the crest portions 52a are in contact with each other.
The plurality of corrugated plates 52 are formed of aluminum, copper, stainless steel or the like in order to efficiently transfer heat between the refrigerant W and the air H. The plurality of corrugated plates 52 are brazed to each other.
Each space formed between the corrugated plates 52 is a flow path for the refrigerant W and the air H.
熱交換器50の各波板52を接合する方法としては、まず、各波板52の山部分52aに、上述したコールドスプレー装置10からロウ材粉末Aを吹き付けて、ロウ材からなる皮膜Rを予め形成しておく。
次に、各波板52を互いの山部分52a(皮膜R)が接触するように積層して仮固定する。
As a method for joining the corrugated plates 52 of the heat exchanger 50, first, the brazing material powder A is sprayed from the cold spray device 10 to the crest portions 52a of the corrugated plates 52, and the coating R made of brazing material is formed. It is formed in advance.
Next, the corrugated plates 52 are laminated and temporarily fixed so that the crest portions 52a (film R) are in contact with each other.
次に、各波板52を仮固定した状態のまま加熱してロウ材からなる皮膜Rを溶融させる。その後、そのまま自然冷却させることで、ロウ材が固化して、複数の波板52が接合する。   Next, the corrugated plate 52 is heated while being temporarily fixed to melt the coating R made of brazing material. Thereafter, the brazing material is solidified by natural cooling as it is, and the plurality of corrugated plates 52 are joined.
このように、コールドスプレー装置10からロウ材粉末Aを吹き付けているので、必要な領域(山部分52a)にのみ、ロウ材からなる皮膜Rを形成することができる。このため、ロウ材の量を最小限に抑えることができる。
したがって、本実施形態に係るロウ材塗布方法を各波板52の接合工程に適用することにより、熱交換器50の製造コストを低減することができる。
Thus, since the brazing material powder A is sprayed from the cold spray device 10, the coating R made of brazing material can be formed only in a necessary region (mountain portion 52a). For this reason, the amount of brazing material can be minimized.
Therefore, the manufacturing cost of the heat exchanger 50 can be reduced by applying the brazing material application method according to the present embodiment to the bonding process of the corrugated plates 52.
なお、図5に示すように、熱交換器50としては、複数の波板52と平板55とを交互に積層させたものであってもよい。この場合には、波板52の山部分52aに皮膜Rを形成してもよいし、平板55に皮膜Rを形成してもよい、或いは両方に形成してもよい。いずれの場合であっても、必要な領域にのみロウ材の皮膜Rを形成すればよい。   As shown in FIG. 5, the heat exchanger 50 may be configured by alternately laminating a plurality of corrugated plates 52 and flat plates 55. In this case, the coating R may be formed on the peak portion 52a of the corrugated plate 52, the coating R may be formed on the flat plate 55, or both may be formed. In any case, the brazing film R may be formed only in a necessary region.
図6は、他の実施形態に係る熱交換器60の主要部の構成及び組立方法を示す模式図である。
熱交換器60は、多管式の熱交換器であって、冷媒Wが流通するパイプ62と、パイプ62の外周面に対して略直交するように接合された複数のフィン65等から構成される。
パイプ62及びフィン65は、冷媒Wと空気Hとの間で効率的に熱伝達を行うために、アルミニウム、銅或いはステンレス鋼等により形成されている。また、パイプ62とフィン65とは、ロウ付けされている。
FIG. 6 is a schematic diagram illustrating a configuration and an assembling method of main parts of a heat exchanger 60 according to another embodiment.
The heat exchanger 60 is a multi-tubular heat exchanger, and includes a pipe 62 through which the refrigerant W flows and a plurality of fins 65 joined so as to be substantially orthogonal to the outer peripheral surface of the pipe 62. The
The pipe 62 and the fin 65 are made of aluminum, copper, stainless steel, or the like in order to efficiently transfer heat between the refrigerant W and the air H. Further, the pipe 62 and the fin 65 are brazed.
パイプ62とフィン65とを接合する方法としては、まず、任意の形状に屈曲させたパイプ62に対して、上述したコールドスプレー装置10からロウ材粉末A(合金粉末Ag、混合粉Am、延性材料粉末A1の後に脆性材料粉末A2)を吹き付けて、ロウ材からなる皮膜Rを予め形成しておく。皮膜Rを形成する領域(ロウ材を塗布する領域)としては、パイプ62とフィン65との接触部分のみでよい。   As a method of joining the pipe 62 and the fin 65, first, the brazing powder A (alloy powder Ag, mixed powder Am, ductile material) is applied from the above-described cold spray device 10 to the pipe 62 bent into an arbitrary shape. A brittle material powder A2) is sprayed after the powder A1 to form a film R made of brazing material in advance. The region where the film R is formed (the region where the brazing material is applied) may be only the contact portion between the pipe 62 and the fin 65.
次いで、パイプ62に形成された皮膜R上に、複数のフィン65を接触させて仮固定する。
そして、パイプ62とフィン65を加熱してロウ材からなる皮膜Rを溶融させる。その後、そのまま自然冷却させることで、ロウ材が固化して、パイプ62とフィン65が接合する。
Next, a plurality of fins 65 are brought into contact with the coating R formed on the pipe 62 and temporarily fixed.
Then, the pipe R and the fin 65 are heated to melt the coating R made of brazing material. Thereafter, the brazing material is solidified by natural cooling as it is, and the pipe 62 and the fin 65 are joined.
このように、コールドスプレー装置10からロウ材粉末Aを吹き付けているので、必要な領域にのみ、ロウ材からなる皮膜Rを形成することができる。このため、ロウ材の量を最小限に抑えることができる。
したがって、本実施形態に係るロウ材塗布方法をパイプ62とフィン65に適用することにより熱交換器50の製造コストを低減することができる。
また、パイプ62のように複雑な形状であっても、容易にロウ材からなる皮膜Rを形成(塗布)することができる。
なお、パイプ62に代えてフィン65にのみ皮膜Rを形成(塗布)してもよいし、或いは、パイプ62とフィン65の両方に皮膜Rを形成(塗布)してもよい。
Thus, since the brazing powder A is sprayed from the cold spray device 10, the coating R made of the brazing material can be formed only in a necessary region. For this reason, the amount of brazing material can be minimized.
Therefore, the manufacturing cost of the heat exchanger 50 can be reduced by applying the brazing material application method according to the present embodiment to the pipe 62 and the fin 65.
Even if the pipe 62 has a complicated shape, the coating R made of brazing material can be easily formed (applied).
Instead of the pipe 62, the film R may be formed (applied) only on the fin 65, or the film R may be formed (applied) on both the pipe 62 and the fin 65.
上述した実施の形態において示した動作手順、あるいは各構成部材の諸形状や組み合わせ等は一例であって、本発明の主旨から逸脱しない範囲において各種条件や設計要求等に基づき種々変更可能である。   The operation procedures shown in the above-described embodiment, or the shapes and combinations of the constituent members are examples, and can be variously changed based on various conditions, design requirements, and the like without departing from the gist of the present invention.
上述した実施形態では、基材B上に塗布する金属材料として、ロウ材の場合について説明したが、これに限らない。例えば、基材Bの耐摩耗性向上を目的として、WC−Coを塗布したり、耐酸化性向上を目的として、MCrAlYを塗布したりする場合であってもよい。
すなわち、ロウ材の場合のように、複数の部材を接合させることを目的とするものに限られず、単に基材B上に合金を塗布する場合であってもよい。この場合においても、コールドスプレー装置10からは、合金粉末や、延性材料からなる粉末と脆性材料からなる粉末を所定の割合で混合した混合粉を吹き付けて、基材B上に皮膜を形成する。
また、延性材料からなる粉末を基材B上に吹き付けて、延性材料からなる皮膜を形成した後に、脆性材料からなる粉末を吹き付けて、所望の組成の皮膜を形成してもよい。
In the above-described embodiment, the case where the brazing material is used as the metal material applied onto the base material B has been described. However, the present invention is not limited to this. For example, WC-Co may be applied for the purpose of improving the wear resistance of the base material B, or MCrAlY may be applied for the purpose of improving the oxidation resistance.
That is, it is not limited to the purpose of joining a plurality of members as in the case of the brazing material, but may be a case where an alloy is simply applied on the base material B. Also in this case, a film is formed on the base material B by spraying from the cold spray device 10 an alloy powder or a mixed powder obtained by mixing a powder made of a ductile material and a powder made of a brittle material at a predetermined ratio.
Alternatively, a powder made of a ductile material may be sprayed onto the substrate B to form a film made of a ductile material, and then a powder made of a brittle material may be sprayed to form a film having a desired composition.
コールドスプレー装置の概略を示す模式図である。It is a schematic diagram which shows the outline of a cold spray apparatus. 本発明の実施形態に係るロウ材塗布方法を工程順に説明する図である。It is a figure explaining the brazing material application | coating method which concerns on embodiment of this invention to process order. ロウ材塗布方法の他の実施形態を工程順に説明する図である。It is a figure explaining other embodiment of a brazing material application method in order of a process. 本発明の実施形態に係る熱交換器の主要部の構成を示す模式図である。It is a schematic diagram which shows the structure of the principal part of the heat exchanger which concerns on embodiment of this invention. 熱交換器の変形例を示す模式図である。It is a schematic diagram which shows the modification of a heat exchanger. 他の実施形態に係る熱交換器の主要部の構成及び組立方法を示す模式図である。It is a schematic diagram which shows the structure and assembly method of the principal part of the heat exchanger which concerns on other embodiment.
符号の説明Explanation of symbols
10…コールドスプレー装置
11N…ノズル
50…熱交換器
52…波板(波箔)
55…平板(平箔)
60…熱交換器
62…パイプ
65…フィン
B…基材(金属部材)
B2…部材(金属部材)
G…作動ガス(高圧ガス)
A…ロウ材粉末(材料粉末)
A1…延性材料粉末(第一粉末)
A2…脆性材料粉末(第二粉末)
R…皮膜(合金皮膜、ロウ材皮膜)
R1…皮膜(延性材料皮膜)
F…材料粉末
DESCRIPTION OF SYMBOLS 10 ... Cold spray apparatus 11N ... Nozzle 50 ... Heat exchanger 52 ... Corrugated sheet (corrugated foil)
55 ... Flat plate
60 ... Heat exchanger 62 ... Pipe 65 ... Fin B ... Base material (metal member)
B2 ... member (metal member)
G ... Working gas (high pressure gas)
A ... brazing powder (material powder)
A1 ... Ductile material powder (first powder)
A2 ... Brittle material powder (second powder)
R ... Film (alloy film, brazing film)
R1 ... Coating (ductile material coating)
F ... Material powder

Claims (5)

  1. 延性材料と脆性材料を含む合金を基材上に塗布する塗布方法であって、
    常温又は加熱した高圧ガスと材料粉末とをノズルから超音速で噴射し、前記材料粉末を融解させることなく前記基材に衝突させて合金皮膜を形成することを特徴とする合金塗布方法。
    An application method for applying an alloy containing a ductile material and a brittle material on a substrate,
    An alloy coating method characterized by spraying normal temperature or heated high pressure gas and material powder at a supersonic speed from a nozzle and causing the material powder to collide with the base material without melting it to form an alloy film.
  2. 前記材料粉末は、延性材料及び脆性材料からなる合金粉末であることを特徴とする請求項1に記載の合金塗布方法。   The alloy coating method according to claim 1, wherein the material powder is an alloy powder made of a ductile material and a brittle material.
  3. 前記材料粉末は、延性材料からなる第一粉末及び脆性材料からなる第二粉末であり、
    前記基材に前記第一粉末を衝突させて延性材料皮膜を形成した後に、前記延性材料皮膜に対して前記第二粉末を衝突させて前記合金皮膜を形成することを特徴とする請求項1に記載の合金塗布方法。
    The material powder is a first powder made of a ductile material and a second powder made of a brittle material,
    The alloy film is formed by causing the second powder to collide with the ductile material film after the ductile material film is formed by colliding the first powder with the base material. The alloy coating method as described.
  4. 同種又は異種の金属部材同士を接合するロウ材を前記金属部材の少なくとも一方に対して塗布するロウ材塗布方法であって、
    常温又は加熱した高圧ガスとロウ材粉末とをノズルから超音速で噴射し、前記ロウ材粉末を融解させることなく前記金属部材に衝突させてロウ材皮膜を形成することを特徴とするロウ材塗布方法。
    A brazing material application method for applying a brazing material for joining metal members of the same type or different types to at least one of the metal members,
    A brazing material coating characterized in that a brazing material film is formed by jetting a high-pressure gas and brazing material powder at normal temperature or heated from a nozzle at a supersonic speed and colliding with the metal member without melting the brazing material powder. Method.
  5. 複数の波箔同士又は複数の波箔と平箔とをロウ材を用いて接合する工程を含む熱交換器の製造方法であって、
    前記平箔及び/又は前記波箔に前記ロウ材を塗布する方法として、請求項4に記載のロウ材塗布方法を用いることを特徴とする熱交換器の製造方法。
    A method of manufacturing a heat exchanger comprising a step of bonding a plurality of corrugated foils or a plurality of corrugated foils and a flat foil using a brazing material,
    A method for manufacturing a heat exchanger, wherein the brazing material coating method according to claim 4 is used as a method of coating the brazing material on the flat foil and / or the corrugated foil.
JP2007071174A 2007-03-19 2007-03-19 Alloy application method, brazing material application method, and manufacturing method of heat exchanger Pending JP2008231486A (en)

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JP2010162602A (en) * 2009-01-07 2010-07-29 General Electric Co <Ge> System and method for joining metallic part by cold spray technique
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