JPH1085954A - Structure for liquid phase diffusion welding part of metal tube - Google Patents
Structure for liquid phase diffusion welding part of metal tubeInfo
- Publication number
- JPH1085954A JPH1085954A JP24087996A JP24087996A JPH1085954A JP H1085954 A JPH1085954 A JP H1085954A JP 24087996 A JP24087996 A JP 24087996A JP 24087996 A JP24087996 A JP 24087996A JP H1085954 A JPH1085954 A JP H1085954A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- joint
- metal
- phase diffusion
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、接合対象の相対す
る管を直接または継手筒を介して、液相拡散接合により
接合して得られる金属管の液相拡散接合部構造に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid phase diffusion joint structure of a metal pipe obtained by joining opposite pipes to be joined directly or through a joint cylinder by liquid phase diffusion joining.
【０００２】[0002]
【従来の技術】金属管の接合方法としては、従来、各種
の溶接方法が一般に適用されているが、近年、溶接方法
に代わって液相拡散接合方法も適用されるようになって
きている。この液相拡散接合方法は、接合しようとする
材料の間に箔、粉末、あるいはメッキ等の形態で被接合
材よりも融点の低い共晶組成を有する合金（非晶質金
属）を介在させて加圧し、挿入合金の液相線直上の温度
に接合部を加熱することによってこの合金を溶融、等温
凝固させる接合法であり、固相接合法の１種と考えられ
ている。2. Description of the Related Art Conventionally, various welding methods have been generally applied as a joining method for metal pipes. In recent years, a liquid phase diffusion joining method has been applied in place of the welding method. In this liquid phase diffusion bonding method, an alloy (amorphous metal) having a eutectic composition having a lower melting point than the material to be bonded is interposed between the materials to be bonded in the form of foil, powder, plating or the like. This is a joining method in which the joint is melted and isothermally solidified by applying pressure and heating the joint to a temperature just above the liquidus line of the inserted alloy, and is considered to be one type of solid-state joining method.
【０００３】この液相拡散接合は、比較的低い面圧で短
時間で強固な接合部が得られるものであり、従来、ステ
ンレス鋼、高ニッケル基合金、耐熱合金鋼またはこれら
と炭素鋼を接合する場合など溶接方法の適用が難しいも
のを対象として広く用いられているものであるが、最近
では一般鋼管を接合対象として適用することも試みられ
ており、金属管を接合対象として適用分野が拡大するこ
とが予想される。In this liquid phase diffusion bonding, a strong bonding portion can be obtained in a short time at a relatively low surface pressure. Conventionally, a stainless steel, a high nickel base alloy, a heat resistant alloy steel or a carbon steel is bonded to these. It is widely used for applications where welding methods are difficult to apply, such as when welding, but recently it has been attempted to apply general steel pipes as joining objects, and the application field has expanded to metal pipes as joining objects. It is expected to be.
【０００４】この液相拡散接合方法を金属管を接合対象
として適用する場合には、相対する金属管の接合面に接
合材として非晶質金属（箔）を介在させるのが一般的で
あり、液相拡散接合に際しては接合面と非晶質金属箔が
均一に接触し、軸心が平行で一致するように調心する必
要がある。この調心は、一般の溶接方法の場合に比較し
てはるかに高い精度で行われる必要がある。（参考技術
日本機械学会 第１回材料、材料加工技術講演会講演
論文 ５０９ 「アモルファス接合システム」１９９３
年１１月１９日 Ｐ３２９に記載）。[0004] When this liquid phase diffusion bonding method is applied to a metal pipe as a bonding object, it is common to interpose an amorphous metal (foil) as a bonding material on the bonding surface of the opposing metal pipe. At the time of liquid phase diffusion bonding, it is necessary to align the bonding surface and the amorphous metal foil uniformly so that their axes are parallel and coincide with each other. This alignment needs to be performed with much higher precision than in the case of a general welding method. (Reference Technology JSME 1st Material and Material Processing Technology Lecture Paper 509 "Amorphous Bonding System" 1993
November 19, 2013, p. 329).
【０００５】[0005]
【発明が解決しようとする課題】従来、上記のような要
請に応えられる調心手段がなく、調心作業負担が大き
く、また、図８に示すような接合対象の金属管ｐａと金
属管Ｐｂの管端の突き合わせ面において、目違いａや図
９に示すような金属管ｐａと金属Ｐｂの管端の突き合わ
せ面において、軸心ずれｂが生じ、切り欠き効果によ
り、調心精度が十分ではなく、引張軸力、あるいは曲げ
負荷時の接合部強度が低下するという問題や、接合面に
間隙を生じ、十分な接合材による液相の浸透が得られ
ず、強固な接合部が得られないという問題を生じること
があり、金属管を接合対象とした液相拡散接合において
は、液相拡散接合の長所を十分に享受できないことが多
かった。Conventionally, there is no centering means that can meet the above-mentioned demand, the burden of centering work is large, and the metal pipes pa and Pb to be joined as shown in FIG. In the abutting surface of the pipe ends, misalignment a occurs, and in the abutting surface of the pipe ends of the metal pipe pa and the metal Pb as shown in FIG. 9, an axial center shift b occurs. In addition, there is a problem that the joint strength at the time of tensile axial force or bending load is reduced, and a gap is formed in the joint surface, and the liquid phase cannot be sufficiently penetrated by the joint material, and a strong joint cannot be obtained. In such a case, the advantages of the liquid phase diffusion bonding cannot be sufficiently enjoyed in the liquid phase diffusion bonding for the metal pipe in many cases.
【０００６】接合面の目違いや管軸のずれを軽減する手
段として、開先形状を工夫する方法もあるが、管の真円
度、偏肉の影響、施工現場での軸合わせの困難さなどか
ら理想的な形状の接合を実現することは難しい。[0006] As a means for reducing misalignment of the joint surface and deviation of the pipe axis, there is a method of devising a groove shape, but the roundness of the pipe, the influence of uneven wall thickness, and the difficulty of axis alignment at the construction site. For this reason, it is difficult to realize an ideally shaped joint.
【０００７】本発明は、金属管を液相拡散接合方法によ
り接合する場合に、目違いや段差、軸心のずれの発生を
簡易な調心手段で極力最小化し、強固な接合部を安定確
保できる、金属管の液相拡散接合構造を提供するもので
ある。The present invention minimizes the occurrence of misalignment, steps, and misalignment of shafts by simple centering means when metal tubes are joined by a liquid phase diffusion joining method, and stably secures a strong joint. The present invention provides a liquid-phase diffusion bonding structure for a metal tube.
【０００８】[0008]
【課題を解決するための手段】本発明の第一の発明は、
継手筒の両側から金属管を挿入して、継手筒と金属管、
または相対する金属管端面同士との間に配した接合材を
液相拡散させて金属管同士を接合した金属管の液相拡散
接合部構造において、端面方向に縮径する外周テーパー
を管端部に設けた金属管と、端面方向に拡径する内周テ
ーパーを該外周テーパーと接するように設けた継手筒と
の間を液相拡散接合面としたことを特徴とする金属管の
液相拡散接合部構造。Means for Solving the Problems The first invention of the present invention is:
Insert a metal tube from both sides of the fitting tube,
Or, in a liquid-phase diffusion bonding structure of a metal pipe in which a bonding material disposed between metal pipe end faces facing each other is liquid-phase diffused and the metal pipes are bonded to each other, the outer peripheral taper whose diameter decreases in the end face direction is formed at the pipe end. Wherein a liquid phase diffusion bonding surface is provided between the metal pipe provided on the inner surface and a joint cylinder provided such that an inner peripheral taper expanding in diameter in an end face direction is in contact with the outer peripheral taper. Joint structure.
【０００９】第二の発明は、金属管の管端部に継手筒を
挿入して、継手筒と金属管、または相対する金属管端面
同士との間に配した接合材を液相拡散させて金属管同士
を接合した金属管の液相拡散接合部構造において、端面
方向に拡径する内周テーパーを管端部に設けた金属管
と、端面方向に縮径する外周テーパーを該内周テーパー
と接するように設けた継手筒との間を液相拡散接合面と
したことを特徴とする金属管の液相拡散接合部構造。According to a second aspect of the present invention, a joint tube is inserted into a tube end of a metal tube, and a joining material disposed between the joint tube and the metal tube or the end surfaces of the opposed metal tubes is subjected to liquid phase diffusion. In the liquid-phase diffusion joining structure of metal pipes in which metal pipes are joined together, a metal pipe provided with an inner peripheral taper that increases in diameter in the end face direction at the pipe end, and an outer taper that reduces in diameter in the end face direction have an inner taper. A liquid-phase diffusion bonding structure for a metal pipe, characterized in that a liquid-phase diffusion bonding surface is provided between a joint pipe provided so as to be in contact with the pipe.
【００１０】第三の発明は、継手筒の両側から金属管を
挿入して、継手筒と金属管との間に配した接合材を液相
拡散させて金属管同士を接合した金属管の液相拡散接合
部構造において、端面方向に縮径する外周テーパーを管
端部に設けた金属管と、端面方向に拡径する内周テーパ
ーを該外周テーパーに接するように設けた継手筒との
間、および／または、継手筒の内側中央部に形成した環
状壁と金属管の管端面との間を液相拡散接合の接合面と
したことを特徴とする金属管の液相拡散接合部構造。In a third aspect of the present invention, a metal pipe is inserted from both sides of a joint tube, and a joining material arranged between the joint tube and the metal tube is subjected to liquid phase diffusion to join the metal tubes to each other. In the phase diffusion bonding portion structure, between a metal pipe provided with an outer peripheral taper whose diameter is reduced in the end face direction at the pipe end, and a joint cylinder provided with an inner peripheral taper whose diameter is increased in the end face direction so as to be in contact with the outer taper. And / or a liquid-phase diffusion bonding structure for a metal pipe, wherein a liquid-phase diffusion bonding surface is formed between an annular wall formed at the center of the inside of the joint cylinder and a pipe end face.
【００１１】第四の発明は、金属管の管端部に継手筒を
挿入して、継手筒と金属管との間に配した接合材を液相
拡散させて金属管同士を接合した金属管の液相拡散接合
部構造において、端面方向に拡径する内周テーパーを管
端部に設けた金属管と、端面方向に縮径する外周テーパ
ーを該内周テーパーと接するように設けた継手筒との
間、および／または、継手筒の外側中央部に形成した環
状壁と金属管の管端面との間を液相拡散接合の接合面と
したことを特徴とする金属管の液相拡散接合部構造。A fourth aspect of the present invention is a metal pipe in which a metal pipe is inserted into a pipe end of a metal pipe and a bonding material disposed between the pipe and the metal pipe is subjected to liquid phase diffusion to bond the metal pipes to each other. In the liquid-phase diffusion bonding structure of (1), a metal pipe provided with an inner peripheral taper increasing in diameter in the end face direction at the pipe end and an outer peripheral taper reducing diameter in the end face direction provided in contact with the inner peripheral taper And / or between the annular wall formed at the center of the outside of the joint tube and the end face of the metal tube as a liquid phase diffusion bonding surface. Part structure.
【００１２】第五の発明は、管端部を拡管した金属管
と、他の管とを接合材を介して液相拡散接合した金属管
の液相拡散接合部構造において、端面方向に縮径する外
周テーパーを管端部に設けた一方の金属管と、端面方向
に拡径する内周テーパーを該外周テーパーに接するよう
に、拡管した管端部に設けた他方の金属管との間を液相
拡散接合の接合面としたことを特徴とする金属管の液相
拡散接合部構造。According to a fifth aspect of the present invention, there is provided a liquid-phase diffusion bonding structure of a metal pipe in which a pipe end is expanded and another pipe is liquid-phase diffusion-bonded through a bonding material. Between the one metal pipe provided with an outer taper at the end of the pipe and the other metal pipe provided at the end of the expanded pipe so that the inner taper that expands in diameter toward the end face contacts the outer taper. A liquid-phase diffusion bonding structure for a metal pipe, wherein the liquid-phase diffusion bonding surface is a bonding surface.
【００１３】第六の発明は、第一の発明〜第五の発明の
いずれかにおいて、接合材が非晶質金属であることを特
徴とする液相拡散接合部構造である。A sixth aspect of the present invention is the liquid-phase diffusion bonding structure according to any one of the first to fifth aspects, wherein the bonding material is an amorphous metal.
【００１４】[0014]
【発明の実施の形態】本発明は、例えば一般鋼やステン
レス鋼、高ニッケル合金等による金属管を液相拡散接合
方法により接合する場合に、目違いや段差、軸心のずれ
の発生を極力最小化して、現場での接合作業で管本体の
引張破断強度以上の強度を有する強固な接合部を安定確
保するためのものであり、接合材を介在させ液相拡散接
合する接合面を、相対する管端部間の管同士または管端
部と継手筒との間に互いに接するようにテーパーを形成
して、調心性を高める金属管の液相拡散接合部構造であ
る。BEST MODE FOR CARRYING OUT THE INVENTION The present invention minimizes the occurrence of misalignments, steps, and misalignments when joining metal pipes made of, for example, general steel, stainless steel, high nickel alloys, etc. by the liquid phase diffusion bonding method. The purpose of this is to minimize and secure a strong joint having strength equal to or higher than the tensile breaking strength of the pipe body in the on-site joining work. This is a liquid-phase diffusion bonding structure of a metal pipe in which tapers are formed so as to be in contact with each other between pipe ends or between a pipe end and a joint tube to improve alignment.
【００１５】相対する管端部を液相拡散接合により接合
する際の施工上の重要課題は、前記したように相対する
管端部間に目違いや段差、軸心のずれがない状態で、接
合材を介在させ、接合面に間隙がない状態で面圧を負荷
して接合面と接合材の密着性を十分に確保することであ
る。本発明においては、いずれも相対するテーパー面が
干渉を始めるため、特別な調心作業を行わなくても接合
対象の管の調心性を高め、軸心を合わせて、接合面と非
晶質金属の密着性を十分に確保でき、十分な接合強度を
確保することができる。An important issue in the construction when joining the opposite pipe ends by liquid phase diffusion bonding is that, as described above, there is no misalignment, step, or misalignment between the opposite pipe ends. An object of the present invention is to ensure sufficient adhesion between the joining surface and the joining material by applying a surface pressure with the joining material interposed and having no gap between the joining surfaces. In the present invention, since the opposing tapered surfaces start to interfere with each other, the alignment of the pipes to be joined is enhanced without performing any special alignment work, the axes are aligned, and the joining surfaces and the amorphous metal are aligned. Can secure sufficient adhesion and sufficient bonding strength.
【００１６】自動調心性を円滑にかつ十分に確保すると
ともに接合強度を十分に確保するためには、接合面を形
成する一方の金属管と他方の金属管（または継手筒）の
端部テーパー面の角度と長さを十分に考慮する必要があ
る。接合面を形成するためのテーパー面については、径
の増減値で表すと、軸方向距離１に対して、直径増減値
が、１／２０〜１／３の範囲になるように選択すること
が望ましい。In order to ensure smooth and sufficient self-alignment and to ensure sufficient joint strength, the tapered surface at one end of one metal tube and the other metal tube (or joint tube) forming the joint surface. Angle and length must be taken into account. When the tapered surface for forming the joining surface is represented by an increase / decrease value of the diameter, it can be selected so that the increase / decrease value of the diameter is in a range of 1/20 to 1/3 with respect to the axial distance of 1. desirable.
【００１７】ここで、１／２０未満では、自動調心効果
が低下すると共に、継手を用いない場合重なり部分が長
くなり過ぎ管全体の長さ損失が大きくなる。１／３度超
では、自立性が失われるとともに心ずれに対しても自動
調心効果が低下する。また、一方の管と他方の管（また
は継手筒）との係合抵抗が大きくなり円滑な係合ができ
なくなるとともに十分な接合面積を確保できず、十分な
接合部強度を確保することができなくなる。Here, if it is less than 1/20, the self-aligning effect is reduced, and when no joint is used, the overlapping portion becomes too long and the length loss of the entire pipe becomes large. If it exceeds 1/3 degrees, the self-independence is lost and the self-centering effect is reduced even for misalignment. Further, the engagement resistance between one tube and the other tube (or the joint tube) becomes large, so that smooth engagement cannot be achieved, and a sufficient joint area cannot be secured, and sufficient joint strength can be secured. Disappears.
【００１８】以下に本発明の、各発明について概要を説
明する。図１は、第一の発明による金属管の液相拡散接
合構造例を概念的に示したものである。接合対象の金属
管１ａと１ｂの端部外周には、端面方向に縮径する外周
テーパー１ｔが形成されており、この外周テーパー１ｔ
は、金属管より外径が大径な継手筒２の両側部内周に形
成された端面方向に拡径する内周テーパー２ｔと係合し
ている。ここでは、この係合面を接合面としており、こ
の係合面に液相拡散接合の接合材３ａを介在させてい
る。また、ここでは金属管１ａ，１ｂの管端面も接合面
とするため、継手筒２内で接合材３ｂを介して金属管の
管端面同士を衝接している。The outline of each invention of the present invention will be described below. FIG. 1 conceptually shows an example of a liquid phase diffusion bonding structure of a metal tube according to the first invention. An outer peripheral taper 1t whose diameter is reduced in the end face direction is formed on the outer periphery of the end portions of the metal tubes 1a and 1b to be joined.
Is engaged with an inner peripheral taper 2t formed on the inner periphery of both sides of the joint tube 2 having an outer diameter larger than that of the metal tube and having an enlarged diameter in an end surface direction. Here, this engaging surface is used as a joining surface, and a joining material 3a for liquid phase diffusion joining is interposed on the engaging surface. Further, in this case, since the pipe end faces of the metal pipes 1a and 1b are also used as joining faces, the pipe end faces of the metal pipes are in contact with each other in the joint tube 2 via the joining material 3b.
【００１９】この状態で、継手筒２の外側に配設した加
熱装置４により接合面およびその周辺部（以下「接合
部」という。）を加熱しながらクランプ機構５ｃと圧縮
応力付与機構５ｐを備えた押圧装置５で圧縮応力を負荷
して、前記の接合面に介在させた接合材３ａ，３ｂを溶
融して液相拡散接合し、第一の発明の金属管の液相拡散
接合構造を得ることができる。In this state, a clamping mechanism 5c and a compressive stress applying mechanism 5p are provided while heating the joint surface and its peripheral portion (hereinafter referred to as "joint portion") by a heating device 4 disposed outside the joint tube 2. A compressive stress is applied by the pressing device 5 to melt the bonding materials 3a and 3b interposed on the bonding surface and perform liquid phase diffusion bonding to obtain the liquid phase diffusion bonding structure of the metal pipe of the first invention. be able to.
【００２０】この第一の発明例では、接合面は、金属管
１ａ，１ｂの端部の外周テーパー１ｔと継手筒２の内周
テーパー２ｔ間、金属管１ａ，１ｂの管端面間に形成す
るため、調心が容易で接合面積を大きくすることがで
き、接合部強度を高めることができる。また、金属管１
ａ，１ｂの端部を継手筒２内に挿入する場合、その最終
段階で金属管の管端面が衝接することにより圧縮応力負
荷が過度になることはなく、接合部が変形することはな
い。In the first embodiment, the joining surface is formed between the outer peripheral taper 1t at the end of the metal pipes 1a and 1b and the inner peripheral taper 2t of the joint tube 2, and between the pipe end faces of the metal pipes 1a and 1b. Therefore, alignment is easy, the bonding area can be increased, and the strength of the bonding portion can be increased. In addition, metal tube 1
In the case where the ends of a and 1b are inserted into the joint tube 2, the end faces of the metal tubes abut at the final stage, so that the compressive stress load does not become excessive and the joint does not deform.
【００２１】また、金属管１ａ，１ｂの端部を継手筒２
に圧入後は、接合面である相対するテーパー１ｔと２
ｔ、金属管の管端面同士は圧入荷重を除荷しても面圧が
付与された状態で自立しているため、加熱時にあらたに
面圧を付与する必要がなく加熱作業を著しく簡易にする
ことができる。図１では、金属管１ａ，１ｂの管端面同
士の衝接面は直面になっているが、テーパーとし、自立
したときの金属管１ａ，１ｂの管端面同士の衝接面での
面圧を高めるようにすることもできる。The ends of the metal tubes 1a and 1b are
After press-fitting, the opposite tapers 1t and 2
t, the end faces of the metal pipes are self-supporting in a state where the surface pressure is applied even when the press-fitting load is removed, so that there is no need to apply a new surface pressure at the time of heating, thereby greatly simplifying the heating operation. be able to. In FIG. 1, the contact surfaces between the pipe end faces of the metal pipes 1a and 1b face each other, but are tapered to reduce the surface pressure at the contact face between the pipe end faces of the metal pipes 1a and 1b when the pipes become independent. It can also be raised.
【００２２】この金属管の液相拡散接合部構造例では、
継手筒２と金属管の管端部間において、接合面がテーパ
ーによって拘束された状態で広い面積で形成されてお
り、継手筒による補強効果が有効に作用する結果、接合
部の剛性が金属管本体部に比べて大きく、圧縮、引張
り、曲げ等の荷重による塑性変形が起こり難く破断強度
の確保が容易である。In this example of the liquid-phase diffusion joint structure of the metal tube,
The joint surface is formed with a large area between the joint tube 2 and the end of the metal tube with the joint surface constrained by the taper. As a result, the reinforcing effect of the joint tube works effectively, and the rigidity of the joint is reduced by the metal tube. Larger than the main body, plastic deformation due to loads such as compression, tension, and bending is unlikely to occur, and it is easy to secure the breaking strength.
【００２３】接合面は、荷重の方向、大きさによって
は、テーパー面あるいは金属管の管端面のみに形成して
も十分な場合もある。主に曲げを被る例えば鋼管杭の接
合においては、鋼管の管端面のみを接合した場合も、テ
ーパー長さを管直径の０．５〜１．０にすることでテー
パー面を接合しない場合も金属管の管端部が継手筒に拘
束されるため、鋼管本体の曲げ強度以上の強度を得るこ
とができる。また、テーパー面での接合材の使用の回避
もでき、コストを削減し、施工性を向上させることがで
きる。Depending on the direction and magnitude of the load, the joining surface may be sufficient to be formed only on the tapered surface or the end surface of the metal tube. For example, in the joining of steel pipe piles that mainly bend, even when only the pipe end face of the steel pipe is joined, even when the taper length is 0.5 to 1.0 of the pipe diameter and the tapered face is not joined, the metal Since the pipe end is restricted by the joint tube, it is possible to obtain a strength equal to or higher than the bending strength of the steel pipe main body. In addition, the use of a joining material on the tapered surface can be avoided, so that the cost can be reduced and the workability can be improved.
【００２４】図２は、第二の発明の金属管の液相拡散接
合部構造例を示している。上記の第一の発明では、接合
対象の相対する金属管の端部を継手筒内周側で接合材に
より液相拡散接合されているが、第二の発明では、接合
対象の相対する金属管の端部が継手筒外周側で接合材に
より液相拡散接合されている。FIG. 2 shows an example of a liquid-phase diffusion bonding structure of a metal tube according to the second invention. In the above first invention, the ends of the metal pipes to be joined are liquid-phase diffusion-bonded by a joining material on the inner peripheral side of the joint cylinder. In the second invention, the metal pipes to be joined are opposed to each other. Is liquid-phase diffusion-bonded by a bonding material on the outer peripheral side of the joint cylinder.
【００２５】この液相拡散接合部構造においては、第一
の発明と同様の効果が得られ他、継手筒が金属管の外周
から突出しない効果があり、例えば、地中に打ち込まれ
る鋼管杭や、外径より僅かに大きい空間に挿入されて施
工される金属管などを接合する場合に適用して好適であ
る。In this liquid phase diffusion joint structure, the same effects as those of the first invention can be obtained, and in addition, there is an effect that the joint cylinder does not protrude from the outer periphery of the metal pipe. It is suitable to be applied to a case where a metal tube or the like inserted and constructed in a space slightly larger than the outer diameter is joined.
【００２６】この金属管の液相拡散接合部構造例では、
接合対象の金属管６ａと６ｂの端部内周に、端面方向に
拡径する内周テーパー６ｔが形成されており、この内周
テーパー６ｔと、金属管の外径より小径の継手筒７の両
側部外周に形成された端面方向に縮径する外周テーパー
７ｔ間に接合面を形成しており、この接合面に液相拡散
接合の接合材３ａを介在させている。また、ここでは金
属管の管端面も接合面としており、金属管６ａ，６ｂの
管端面は継手筒７の外周で接合材３ｂを介して衝接して
いる。In this example of the liquid-phase diffusion bonding structure of the metal tube,
An inner peripheral taper 6t whose diameter increases in the direction of the end face is formed on the inner periphery of the ends of the metal tubes 6a and 6b to be joined, and both sides of the inner peripheral taper 6t and the joint cylinder 7 having a smaller diameter than the outer diameter of the metal tube. A joining surface is formed between outer peripheral tapers 7t formed on the outer periphery and having a diameter reduced in the direction of the end face, and a joining material 3a for liquid phase diffusion joining is interposed on the joining surface. Here, the pipe end faces of the metal pipes are also used as joining surfaces, and the pipe end faces of the metal pipes 6a and 6b are in contact with the outer periphery of the joint cylinder 7 via the joining material 3b.
【００２７】この状態で、金属管の管端部の外側に配設
した加熱装置４により接合面およびその周辺部（以下
「接合部」という。）を加熱しながらクランプ機構５ｃ
と圧縮応力付与機構５ｐを備えた押圧装置５（図１参
照）で矢印方向に圧縮応力を負荷して、前記の接合面に
介在させた接合材３ａ，３ｂを溶融させ、金属管６ａと
６ｂの端部を継手筒７を介して液相拡散接合し、第二の
発明の液相拡散接合部構造を得ることができる。In this state, the clamp mechanism 5c is heated while heating the joint surface and its peripheral portion (hereinafter referred to as "joint portion") by the heating device 4 disposed outside the end of the metal tube.
Compressive stress is applied in the direction of the arrow by a pressing device 5 (see FIG. 1) provided with a compression stress applying mechanism 5p to melt the joining materials 3a, 3b interposed on the joining surface, and to form metal tubes 6a and 6b. Is liquid-phase diffusion bonded through the joint cylinder 7 to obtain the liquid-phase diffusion bonded structure of the second invention.
【００２８】図３および図４は第三の発明の液相拡散接
合部構造例を示している。接合対象の金属管１ａと１ｂ
の端部外周には、端面方向に縮径する外周テーパー１ｔ
が形成されており、この外周テーパー１ｔは、金属管よ
り外径が大径の継手筒２の両側部内周に形成された端面
方向に拡径する内周テーパー２ｔと係合している。ここ
では、この係合面を接合面としており、この係合面に液
相拡散接合の接合材３ａを介在させている。FIGS. 3 and 4 show an example of the structure of the liquid phase diffusion bonding portion according to the third invention. Metal tubes 1a and 1b to be joined
Has an outer peripheral taper 1t whose diameter is reduced in the end face direction.
The outer peripheral taper 1t is engaged with an inner peripheral taper 2t formed on the inner periphery of both sides of the joint tube 2 having an outer diameter larger than that of the metal pipe and having an enlarged diameter in the end face direction. Here, this engaging surface is used as a joining surface, and a joining material 3a for liquid phase diffusion joining is interposed on the engaging surface.
【００２９】また、継手筒２の内周中央部には、環状壁
２ｗが形成されており、金属管１ａ，１ｂの管端面はこ
の環状壁２ｗの側面に衝接している。ここでは、この衝
接面も接合面としており、この衝接面に液相拡散接合の
接合材３ｂを介在させている。この状態で、継手筒２の
外側に配設した加熱装置４により接合面およびその周辺
部（以下「接合部」という。）を加熱しながらクランプ
機構５ｃと圧縮応力付与機構５ｐを備えた押圧装置５で
矢印方向に圧縮応力を負荷して、前記の接合面に介在さ
せた接合材３ａ，３ｂを溶融させ、金属管１ａと１ｂの
端部を継手筒２を介して液相拡散接合し、第三の発明の
金属管の液相拡散接合構造を得ることができる。An annular wall 2w is formed at the center of the inner periphery of the joint tube 2, and the end surfaces of the metal tubes 1a and 1b are in contact with the side surfaces of the annular wall 2w. Here, the contact surface is also a joining surface, and the joining material 3b for liquid phase diffusion bonding is interposed on the contact surface. In this state, a pressing device provided with a clamp mechanism 5c and a compressive stress applying mechanism 5p while heating the joint surface and its peripheral portion (hereinafter referred to as “joint portion”) by a heating device 4 disposed outside the joint tube 2. 5, a compressive stress is applied in the direction of the arrow to melt the joining materials 3a and 3b interposed on the joining surface, and to perform liquid phase diffusion joining of the ends of the metal tubes 1a and 1b via the joint tube 2. The liquid-phase diffusion bonding structure for a metal tube according to the third invention can be obtained.
【００３０】この金属管の液相拡散接合構造例では、接
合面は、金属管１ａ，１ｂの端部の外周テーパー１ｔと
継手筒２の内周テーパー２ｔ間、金属管１ａ，１ｂの管
端面と継手筒２の環状壁２ｗの間に形成されるため、調
心が容易で接合面積を大きくすることができ、接合部強
度を高めることができる。また、金属管１ａ，１ｂの端
部を継手筒２内に挿入する場合、その最終段階で管端面
が環状壁２ｗの側面に衝接することにより圧縮応力負荷
が過度になることはなく、接合部が変形することはな
い。In this liquid-phase diffusion bonding structure of a metal pipe, the bonding surface is between the outer peripheral taper 1t at the end of the metal pipes 1a and 1b and the inner peripheral taper 2t of the joint tube 2, and the pipe end faces of the metal pipes 1a and 1b. And between the annular wall 2w of the joint cylinder 2, the centering is easy, the joint area can be increased, and the joint strength can be increased. When the ends of the metal tubes 1a, 1b are inserted into the joint tube 2, the end faces of the tube abut against the side surfaces of the annular wall 2w in the final stage, so that the compressive stress load does not become excessive, and Is not deformed.
【００３１】また、金属管１ａ，１ｂの端部を継手筒２
に圧入後は、接合面である相対するテーパー１ｔと２
ｔ、金属管の管端面と環状壁は圧入荷重を除荷しても面
圧が付与された状態で自立しているため、加熱時にあら
たに面圧を付与する必要がなく加熱作業を著しく簡易に
することができる。The ends of the metal tubes 1a and 1b are
After press-fitting, the opposite tapers 1t and 2
t, the end face of the metal tube and the annular wall are self-supporting in the state where the surface pressure is applied even when the press-fitting load is removed, so there is no need to newly apply the surface pressure during heating, and the heating work is significantly simplified. Can be
【００３２】図３では、金属管１ａ，１ｂの端面と環状
壁２ｗの衝接面は直面になっているが、図４では、金属
管１ａ，１ｂの管端面をテーパー形状とし、このテーパ
ーに衝接する環状壁２ｗの形状を楔状にして、衝接面を
テーパー形状とし、自立したときの金属管１ａ，１ｂの
管端面と環状壁２ｗとの衝接面での面圧を高めるように
している。In FIG. 3, the end surfaces of the metal tubes 1a and 1b and the abutting surfaces of the annular wall 2w are facing each other. In FIG. 4, the tube end surfaces of the metal tubes 1a and 1b are tapered. The annular wall 2w to be abutted is formed into a wedge shape, the abutting surface is tapered, and the surface pressure at the abutting surface between the pipe end surfaces of the metal tubes 1a and 1b and the annular wall 2w when self-standing is increased. I have.
【００３３】この金属管の液相拡散接合部構造例では、
継手筒２と金属管の管端部間において、接合面が管端部
のテーパーと環状壁２ｗによって拘束された状態で広い
面積で形成されており、継手筒による補強効果が有効に
作用する結果、接合部の剛性が管本体部に比べて大き
く、圧縮、引張り、曲げ等の荷重による塑性変形が起こ
りにくい。接合面は、荷重の方向、大きさによっては、
管端部と継手筒とのテーパー面あるいは環状壁２ｗとの
衝接面のみに形成しても十分な場合もある。In the example of the liquid phase diffusion joint structure of the metal tube,
Between the joint tube 2 and the tube end of the metal tube, the joining surface is formed in a large area with the taper of the tube end and the annular wall 2w constrained, so that the reinforcing effect by the joint tube works effectively. Also, the rigidity of the joint is greater than that of the pipe body, and plastic deformation due to loads such as compression, tension, and bending is less likely to occur. Depending on the direction and magnitude of the load,
In some cases, it may be sufficient to form it only on the tapered surface between the pipe end and the joint cylinder or on the contact surface between the pipe wall and the annular wall 2w.
【００３４】主に曲げを被る例えば鋼管杭の接合におい
ては、環状壁２ｗと管端面との衝接面のみを接合する場
合も有り得るが、この場合、テーパー長さを管直径の
０．５〜１．０にすることでテーパー面を結合しなくて
も管端部が継手筒に拘束されるため、管体曲げ強度以上
の接合強度を得ることができる。この設計により、管端
部のテーパー面での接合材の使用を回避でき、コストを
削減し、施工性を向上させることができる。For example, in the joining of a steel pipe pile mainly subject to bending, there may be a case where only the contact surface between the annular wall 2w and the pipe end face is joined, but in this case, the taper length is set to 0.5 to the pipe diameter of 0.5 to less. By setting the ratio to 1.0, the pipe end is restrained by the joint cylinder without connecting the tapered surfaces, so that a bonding strength equal to or higher than the pipe bending strength can be obtained. With this design, the use of a joining material on the tapered surface of the pipe end can be avoided, cost can be reduced, and workability can be improved.
【００３５】図５および図６は、第四の発明の液相拡散
接合部構造例を示している。上記の第三の発明では、接
合対象の相対する金属管の端部を金属管より外径が大径
の継手筒内周側で接合材により液相拡散接合している
が、第四の発明では、接合対象の相対する金属管の端部
に金属管より外径が小径の継手筒を挿入し、金属管と継
手筒との間に配した接合材により液相拡散接合してい
る。FIGS. 5 and 6 show an example of the structure of the liquid-phase diffusion bonding portion according to the fourth invention. In the above third invention, the liquid phase diffusion bonding is performed by using a bonding material on the inner peripheral side of the joint cylinder having an outer diameter larger than that of the metal pipe at the end of the opposite metal pipe to be welded. In this method, a joint pipe having an outer diameter smaller than that of the metal pipe is inserted into the end of the opposite metal pipe to be joined, and liquid-phase diffusion bonding is performed using a joining material disposed between the metal pipe and the joint pipe.
【００３６】この液相拡散接合部構造においては、第三
の発明と同様の効果が得られ他、継手筒が管の外径を拡
大しない効果があり、例えば、地中に打ち込まれる金属
管杭や、外径より僅かに大きい空間に挿入されて施工さ
れる金属管などを接合する場合に適用して好適である。In this liquid phase diffusion joint structure, the same effect as that of the third invention can be obtained, and also, there is an effect that the outer diameter of the pipe is not enlarged by the joint cylinder. Also, it is suitable to be applied to a case where a metal pipe or the like inserted and constructed in a space slightly larger than the outer diameter is joined.
【００３７】この液相拡散接合部構造では、接合対象の
金属管６ａと６ｂの端部内周に、端面方向に拡径する内
周テーパー６ｔが形成されており、この内周テーパー
は、金属管より外径が小径の継手筒７の両側部外周に形
成された端面側に縮径する外周テーパー７ｔと係合して
いる。ここでは、この係合面を接合面としており、この
係合面に液相拡散接合の接合材３ａを介在させている。In this liquid-phase diffusion joining structure, an inner peripheral taper 6t whose diameter increases in the direction of the end face is formed on the inner periphery of the ends of the metal pipes 6a and 6b to be joined. It is engaged with an outer peripheral taper 7t formed on the outer periphery of both sides of the joint cylinder 7 having a smaller outer diameter and having a diameter reduced on the end face side. Here, this engaging surface is used as a joining surface, and a joining material 3a for liquid phase diffusion joining is interposed on the engaging surface.
【００３８】また、継手筒７の外周中央部には、金属管
６ａ，６ｂの管端面が衝接するように環状壁７ｗを形成
している。ここでは、この衝接面も接合面としており、
この衝接面に液相拡散接合の接合材３ｂを介在させてい
る。An annular wall 7w is formed at the center of the outer periphery of the joint tube 7 so that the tube end surfaces of the metal tubes 6a and 6b abut against each other. Here, this contact surface is also a joining surface,
A bonding material 3b for liquid phase diffusion bonding is interposed on this contact surface.
【００３９】図６では、金属管６ａ，６ｂの管端面がテ
ーパー形状に形成され、この管端面のテーパー面と係合
する環状壁２ｗの形状を楔状にして、衝接面をテーパー
形状とし、自立したときの金属管６ａ，６ｂの管端面と
環状壁７ｗとの衝接面での面圧を高めるようにしてい
る。In FIG. 6, the pipe end faces of the metal pipes 6a and 6b are formed in a tapered shape, the shape of the annular wall 2w engaging with the tapered face of the pipe end faces is made wedge-shaped, and the contact surface is made tapered. The surface pressure at the abutting surface between the tube end surfaces of the metal tubes 6a and 6b and the annular wall 7w when self-standing is increased.
【００４０】この状態で、金属管の管端部の外側に配設
した加熱装置４により接合面およびその周辺部（以下
「接合部」という。）を加熱しながらクランプ機構５ｃ
と圧縮応力付与機構５ｐを備えた押圧装置５（図１〜図
３参照）で圧縮応力を負荷して、前記の接合面に介在さ
せた接合材３ａ，３ｂを溶融させ、管６ａと６ｂの端部
を継手筒７を介して液相拡散接合し、第四の発明の液相
拡散接合部構造を得ることができる。In this state, the clamp mechanism 5c is heated while heating the joint surface and its peripheral portion (hereinafter referred to as "joint portion") by the heating device 4 disposed outside the end of the metal tube.
A compressive stress is applied by a pressing device 5 (see FIGS. 1 to 3) having a compressive stress applying mechanism 5p to melt the joining materials 3a and 3b interposed between the joining surfaces, and to form the pipes 6a and 6b. The ends are liquid-phase diffusion-bonded via the joint cylinder 7, and the liquid-phase diffusion-bonded structure of the fourth invention can be obtained.
【００４１】図７は、第五の発明の液相拡散接合部構造
例を示している。この拡散接合構造例においては、接合
対象の金属管を直接に液相拡散接合するものであり、調
心が容易で接合面積を大きくできるため、接合部強度を
確保することができ、また、継手筒を省略して接合コス
トを低減することができる。FIG. 7 shows an example of a liquid-phase diffusion bonding portion structure according to the fifth invention. In this diffusion bonding structure example, the metal pipes to be bonded are directly liquid-phase diffusion bonded, and the alignment is easy and the bonding area can be increased, so that the bonding strength can be ensured. By omitting the tube, the joining cost can be reduced.
【００４２】この液相拡散接合部構造では、一方の金属
管８の端部外周に端面方向に縮径する外周テーパー８ｔ
を形成し、他方の金属管９の端部を拡管してこの拡管部
内周に端面方向に拡径する内周テーパー９ｔを形成し、
一方の金属管８の外周テーパー８ｔと他方の金属管９の
内周テーパー９ｔ間を接合面としており、ここに液相拡
散接合の接合材３を介在させている。In this liquid-phase diffusion bonding structure, an outer peripheral taper 8t having a diameter reduced in the direction of the end face is formed on the outer periphery of the end of one of the metal tubes 8.
Is formed, and the end of the other metal pipe 9 is expanded to form an inner peripheral taper 9t on the inner circumference of the expanded pipe in the direction of the end face,
A joining surface is formed between the outer peripheral taper 8t of the one metal tube 8 and the inner peripheral taper 9t of the other metal tube 9, and the joining material 3 for liquid phase diffusion joining is interposed therebetween.
【００４３】この状態で、金属管の管端部の外側に配設
した加熱装置４により接合部を加熱しながらクランプ機
構５ｃと圧縮応力付与機構５ｐを備えた押圧装置５（図
１〜図３参照）で圧縮応力を負荷して、前記の接合面に
介在させた接合材である非晶質金属３を溶融させ、金属
管８と（端部拡管）金属管９を直接に液相拡散接合し、
第五の発明の液相拡散接合部構造を得ることができる。In this state, a pressing device 5 (FIGS. 1 to 3) provided with a clamp mechanism 5c and a compressive stress applying mechanism 5p while heating the joint by a heating device 4 disposed outside the end of the metal tube. ) To apply a compressive stress to melt the amorphous metal 3 serving as a bonding material interposed on the bonding surface, and directly connect the metal pipe 8 and the (end-expanded) metal pipe 9 by liquid phase diffusion bonding. And
The liquid phase diffusion joint structure of the fifth invention can be obtained.
【００４４】この発明では、同径の金属管を接合する場
合では、前記テーパー面効果を得るために、一方の金属
管８の端部と係合する他方の金属管９の端部を拡管する
が、この拡管量は、拡管によってテーパー９ｔを形成す
る場合には、拡管部端の内径が、一方の管の外径に近い
所まで拡管されている必要がある。According to the present invention, when joining metal tubes having the same diameter, the end of the other metal tube 9 which engages with the end of one metal tube 8 is expanded in order to obtain the tapered surface effect. However, in the case of forming the taper 9t by expanding the pipe, it is necessary that the inner diameter of the expanded pipe end is expanded to a position close to the outer diameter of one pipe.
【００４５】この場合には、拡管部端と一方の金属管の
外周面間に管の厚みに近い段差を生じる。この段差量は
規制される場合が多く、許容の範囲になるように拡管部
外周面を研削加工する場合が多いが段差量が小さ過ぎる
と、ここでの強度が低下するので、この段差は通常、外
径の数％の範囲内で残存させる場合が多い。In this case, a step close to the thickness of the tube is generated between the end of the expanded portion and the outer peripheral surface of one of the metal tubes. The amount of this step is often regulated, and the outer peripheral surface of the expanded portion is often ground so as to be within an allowable range. However, if the amount of the step is too small, the strength here decreases, so this step is usually In many cases, it is left within a range of several percent of the outer diameter.
【００４６】拡管した後に拡管部内面に、例えば研削加
工によってテーパー面を形成する場合には、拡管部端で
の拡管量は、拡管によってテーパー９ｔを形成する場合
に対して、その１／３〜１／２程度に減少させることが
できる。なお、拡管部は径が大きくなり、強度低下の懸
念がある場合はこの拡管部を増肉することも有効であ
る。In the case where a tapered surface is formed on the inner surface of the expanded portion by, for example, grinding after expansion, the expansion amount at the end of the expanded portion is 1/3 to that in the case where the taper 9t is formed by expansion. It can be reduced to about 1/2. It is effective to increase the thickness of the expanded portion when the diameter of the expanded portion increases and there is a concern that the strength may decrease.
【００４７】この液相拡散接合部構造例では、他方の金
属管９の端部は拡管されており、この端部外周面（点線
表示）と一方の金属管８の外周面との段差が大きくなる
ので、端部９ｐを研削加工してこの段差を小さくしてい
る。In this example of the liquid-phase diffusion joint structure, the end of the other metal tube 9 is expanded, and the step between the outer peripheral surface of this end (indicated by a dotted line) and the outer peripheral surface of one metal tube 8 is large. Therefore, the edge 9p is ground to reduce the level difference.
【００４８】上記した本発明の各実施例で用いる加熱装
置（手段）４としては、各種考えられるが、接合部を簡
易に均一加熱できる誘導加熱装置、通電加熱装置、電熱
ヒーター等の電気加熱装置が適性が高く、継手筒の外周
側に配設するのが一般的と言えるが、継手筒内に内蔵さ
せたり、継手筒自体を発熱体として用いてもよい。As the heating device (means) 4 used in each of the above-mentioned embodiments of the present invention, various types are conceivable. However, an electric heating device such as an induction heating device, an energizing heating device, an electric heating heater or the like which can easily and uniformly heat the joint portion. Although it is generally appropriate to dispose it on the outer peripheral side of the joint tube, it may be said that the joint tube is built in the joint tube or the joint tube itself may be used as a heating element.
【００４９】加熱温度は、接合材が溶融し、接合対象の
管の特性が低下しない範囲で、金属管の材質、接合材の
種類、接合部に要求される特性等を考慮して選択する
が、通常の場合は９００〜１２００℃である。The heating temperature is selected in consideration of the material of the metal tube, the type of the joining material, the characteristics required for the joint, and the like, within a range where the joining material is melted and the characteristics of the tube to be joined are not deteriorated. The temperature is usually 900 to 1200 ° C.
【００５０】接合部での圧縮応力負荷は通常の場合１〜
１００ＭＰａ（メガパスカル）で十分であり、そのため
の押圧置５は、クランプ機構５ｃと圧縮応力付与機構５
ｐを備えた簡易な構造のものを用いて十分である。継手
筒は、接合部の補強を兼ねるものであり、接合対象の金
属管の強度と同等以上の強度を有し、金属管と液相拡散
接合して十分な接合強度を確保できる金属で形成するこ
とが好ましい。The compressive stress load at the joint is usually 1 to
100 MPa (megapascal) is sufficient, and the pressing device 5 for that purpose includes a clamping mechanism 5 c and a compressive stress applying mechanism 5.
A simple structure with p is sufficient. The joint cylinder also serves to reinforce the joint, has a strength equal to or higher than the strength of the metal pipe to be joined, and is formed of a metal capable of securing sufficient joining strength by liquid phase diffusion joining with the metal pipe. Is preferred.
【００５１】また、本発明における接合は液相拡散接合
であるため、接合材としては、均一で安定した液相拡散
性を有する例えばＦｅ系、Ｎｉ系、Ｃｕ−Ｔｉ系の非晶
質金属（箔）が好適である。なお、本発明でいう拡散接
合とは、液相拡散が５０％以上である液相拡散接合を意
味し、拡散ろう付け接合を含むものである。Further, since the bonding in the present invention is a liquid phase diffusion bonding, as a bonding material, for example, an Fe-based, Ni-based, or Cu-Ti-based amorphous metal (having a uniform and stable liquid-phase diffusion property) is used. Foil) is preferred. The diffusion bonding in the present invention means liquid phase diffusion bonding in which liquid phase diffusion is 50% or more, and includes diffusion brazing bonding.
【００５２】[0052]
【実施例】本発明の各発明の実施結果と評価結果につい
て、表１〜表５に基づいて説明する。この実施例では、
外径２６７mm、肉厚９．３mmの鋼管（材質、ＳＴＫ４０
０）を接合対象とし、非晶質金属箔を接合材とする液相
拡散接合を実施し、得られた接合部について、引張破断
試験を実施し、その破断強度（kN）について評価した。
接合材としては、Ｂ：８wt％、Ｓｉ：１０wt％、Ｖ：１
２wt％、Ｆｅ：残部の成分の非晶質金属箔を用いた。な
お、各表の接合面テーパーの数値は、軸線に平行な距離
１に対する径の増・減分値で示したものである。[Embodiments] The implementation results and evaluation results of each invention of the present invention will be described based on Tables 1 to 5. In this example,
Steel pipe with outer diameter of 267mm and wall thickness of 9.3mm (Material: STK40
Liquid-phase diffusion bonding using an amorphous metal foil as a bonding material was performed for the bonding target of (0), and a tensile rupture test was performed on the obtained bonded portion to evaluate its rupture strength (kN).
B: 8 wt%, Si: 10 wt%, V: 1
An amorphous metal foil of 2 wt%, Fe: balance was used. In addition, the numerical value of the joining surface taper in each table is represented by an increase / decrease value of the diameter with respect to a distance 1 parallel to the axis.
【００５３】[0053]
【表１】 [Table 1]
【００５４】[0054]
【表２】 [Table 2]
【００５５】[0055]
【表３】 [Table 3]
【００５６】[0056]
【表４】 [Table 4]
【００５７】[0057]
【表５】 [Table 5]
【００５８】[0058]
【表６】 [Table 6]
【００５９】（１）表１は、第一の発明の実施例を示し
たものである。サンプルNo．１〜３は図１に示すような
内周面にテーパーを有する継手筒を用い、その内周テー
パー面と鋼管の外周テーパー面の係合面と、鋼管の管端
面間の衝接面を接合面として液相拡散接合した場合のも
のであり、表１のサンプルNo．４は継手筒の内周テーパ
ーと管の外周テーパーの係合面のみを接合面として液相
拡散接合した場合のものである。(1) Table 1 shows an embodiment of the first invention. Sample No. 1 to 3 use a joint cylinder having a tapered inner peripheral surface as shown in FIG. 1, and join an engagement surface between the inner peripheral tapered surface and an outer tapered surface of the steel pipe and an abutting surface between the pipe end faces of the steel pipe. This is the case where liquid phase diffusion bonding is performed as the surface. Reference numeral 4 denotes a case in which liquid phase diffusion bonding is performed using only the engagement surface between the inner peripheral taper of the joint cylinder and the outer peripheral taper of the pipe as a joint surface.
【００６０】また、表１のサンプルNo．５は、図１に示
すような内周面にテーパーを有する継手筒を用い、鋼管
の管端面間の衝接面のみを接合面として液相拡散接合し
た比較例である。これら第一の発明の実施例での接合部
破断強度（kN）は３３８０〜３３９０と、鋼管本体より
高い強度の十分に満足できる接合部が得られた。また、
管端面のみの接合では、管体以上の強度は得られなかっ
た。Further, the sample Nos. Reference numeral 5 is a comparative example in which a joint cylinder having a tapered inner peripheral surface as shown in FIG. 1 was used, and liquid phase diffusion bonding was performed using only a contact surface between pipe end surfaces of a steel pipe as a bonding surface. The joint rupture strength (kN) in the examples of the first invention was 3380 to 3390, which was a sufficiently high joint strength higher than that of the steel pipe main body. Also,
By joining only the pipe end face, strength higher than that of the pipe could not be obtained.
【００６１】（２）表２は、第二の発明の実施例を示し
たものである。サンプルNo．１〜３は図２に示すような
外周面にテーパーを有する継手筒を用い、その外周テー
パーと鋼管の内周テーパーの係合面、鋼管の管端面間の
衝接面を接合面として液相拡散接合した場合のものであ
り、表２のサンプルNo．４は図２に示すような外周面に
テーパーを有する継手筒を用い、その外周テーパーと鋼
管の外周テーパー面の係合面のみを接合面として液相拡
散接合した場合のものである。(2) Table 2 shows an embodiment of the second invention. Sample No. 1 to 3 use a joint cylinder having a taper on the outer peripheral surface as shown in FIG. 2, and use the joint surface between the outer taper and the inner peripheral taper of the steel pipe, and the abutment surface between the pipe end faces of the steel pipe as a joining surface. This is the case when diffusion bonding is performed. Reference numeral 4 denotes a case where a joint cylinder having a tapered outer peripheral surface as shown in FIG. 2 is used, and liquid phase diffusion bonding is performed using only the engaging surface between the outer peripheral taper and the outer peripheral tapered surface of the steel pipe as a joining surface.
【００６２】また、表２のサンプルNo．５は、図２に示
すような内周面にテーパーを有する継手筒を用い、鋼管
の管端面間の衝接面のみを接合面として液相拡散接合し
た比較例である。これら第二の発明の実施例での接合部
破断強度（kN）は３３３０〜３３８０と、管体より高い
強度の十分に満足できる接合部が得られた。これに対し
て、管端面のみの接合では、管体以上の強度は得られな
かった。Further, in Table 2, the sample No. Reference numeral 5 is a comparative example in which a joint cylinder having a tapered inner peripheral surface as shown in FIG. 2 was used and liquid phase diffusion bonding was performed using only the contact surface between the pipe end surfaces of the steel pipe as a bonding surface. The joint breaking strength (kN) in the embodiment of the second invention was 3330 to 3380, and a sufficiently satisfactory joint having a higher strength than the tubular body was obtained. On the other hand, by joining only the pipe end face, strength higher than that of the pipe could not be obtained.
【００６３】（３）表３は、第三の発明の実施例を示し
たものである。サンプルNo．１〜５は図３に示すような
内周面にテーパー面と環状壁を有する継手筒を用い、そ
の内周テーパーと鋼管の外周テーパーの係合面、継手管
の内側中央部に形成した環状壁面と鋼管の管端面間との
衝接面を接合面として液相拡散接合した場合のものであ
り、表３のサンプルNo．６は継手筒の内周テーパーと鋼
管の外周テーパーの係合面のみを接合面として液相拡散
接合した場合のものである。(3) Table 3 shows an embodiment of the third invention. Sample No. 1 to 5 use a joint cylinder having a tapered surface and an annular wall on the inner peripheral surface as shown in FIG. 3, the engagement surface of the inner peripheral taper and the outer peripheral taper of the steel pipe, and the annular formed at the inner central portion of the joint pipe. This is a case in which liquid phase diffusion bonding is performed with the contact surface between the wall surface and the pipe end face as the bonding surface. Reference numeral 6 denotes a case in which liquid phase diffusion bonding is performed using only the engagement surface between the inner peripheral taper of the joint cylinder and the outer peripheral taper of the steel pipe as the joining surface.
【００６４】また、表３のサンプルNo．７は図３に示す
ような内周面にテーパーと環状壁を有する継手筒を用
い、その環状壁面（テーパー面）と鋼管の管端面（テー
パー面）の衝接面のみを接合面として接合した比較例で
ある。表３のサンプルNo．８は図４に示すような内周面
にテーパーと環状壁を有する継手筒を用い、その内周テ
ーパーと鋼管の外周テーパーの係合面、継手管の内側中
央部に形成した環状壁面（テーパー面）と鋼管の管端面
（テーパー面）の衝接面を接合面として液相拡散接合し
た場合のものであり、表３のサンプルNo．９は継手筒の
内周テーパーと鋼管の外周テーパーの係合面のみを接合
面として液相拡散接合した場合のものである。In Table 3, the sample No. Reference numeral 7 denotes a joint cylinder having a taper and an annular wall on the inner peripheral surface as shown in FIG. 3, and was joined with only the contact surface between the annular wall surface (taper surface) and the pipe end surface (taper surface) of the steel pipe as a joint surface. It is a comparative example. Sample No. in Table 3 Reference numeral 8 denotes a joint cylinder having a taper and an annular wall on the inner peripheral surface as shown in FIG. 4, the engagement surface of the inner peripheral taper and the outer peripheral taper of the steel pipe, and the annular wall surface (taper) formed at the inner central portion of the joint pipe. Surface) and the pipe end surface (tapered surface) of the steel pipe as a joining surface when liquid phase diffusion bonding was performed. Reference numeral 9 denotes a case in which liquid phase diffusion bonding is performed using only the engagement surface of the inner peripheral taper of the joint cylinder and the outer peripheral taper of the steel pipe as the joining surface.
【００６５】また、表３のサンプルNo．１０は図４に示
すような内周面にテーパー面と継手管の内側中央部に形
成した環状壁を有する継手筒を用い、その環状壁面（テ
ーパー面）と鋼管の管端面（テーパー面）の衝接面のみ
を接合面として液相拡散接合した比較例である。これら
第三の発明の実施例では、破断強度（kN）は３３７０〜
３４００と、管体より高い強度の十分に満足できる接合
部が得られた。In Table 3, the sample No. Reference numeral 10 denotes a joint cylinder having a tapered surface on the inner peripheral surface and an annular wall formed at the center of the inner side of the joint pipe as shown in FIG. 4, and the annular wall surface (tapered surface) and the pipe end surface (tapered surface) of the steel pipe are used. This is a comparative example in which liquid phase diffusion bonding is performed using only the contact surface as a bonding surface. In these examples of the third invention, the breaking strength (kN) is 3370 to
3400, a sufficiently satisfactory joint with a higher strength than the tube was obtained.
【００６６】（４）表４は、第四の発明の実施例を示し
たものである。サンプルNo．１〜３は図５に示すような
外周面にテーパー面と外側中央部に環状壁を有する継手
筒を用い、その外周テーパーと鋼管の内周テーパーの係
合面、環状壁面と鋼管の管端面の衝接面を接合面として
液相拡散接合した場合のものであり、表４のサンプルN
o．４は、その外周テーパー面と鋼管の内周テーパー面
の係合面のみを接合面として接合した場合のものであ
る。(4) Table 4 shows an embodiment of the fourth invention. Sample No. 1 to 3 use a joint cylinder having a tapered outer surface and an annular wall at an outer central portion as shown in FIG. 5, an engagement surface between the outer peripheral taper and an inner peripheral taper of the steel pipe, and an annular wall surface and a pipe end face of the steel pipe. In the case of liquid phase diffusion bonding with the contact surface of
o. No. 4 is a case where only the engagement surface between the outer peripheral taper surface and the inner peripheral taper surface of the steel pipe is used as a joint surface.
【００６７】また、表４のサンプルNo．５は図５に示す
ような内周面にテーパーと環状壁を有する継手筒を用
い、その環状壁面（テーパー面）と鋼管の管端面（テー
パー面）の衝接面のみを接合面として接合した比較例で
ある。表４のサンプルNo．６は図６に示すような内周面
にテーパーと外側中央部に環状壁を有する継手筒を用
い、その外周テーパーと鋼管の内周テーパーの係合面、
環状壁面と鋼管の管端面の衝接面を接合面として液相拡
散接合した場合のものであり、表４のサンプルNo．７
は、その外周テーパーと鋼管の内周テーパーの係合面の
みを接合面として液相拡散接合した場合のものである。In Table 4, the sample No. Reference numeral 5 denotes a joint cylinder having a taper and an annular wall on the inner peripheral surface as shown in FIG. 5, and was joined by using only the contact surface between the annular wall surface (taper surface) and the pipe end surface (taper surface) of the steel pipe as a joint surface. It is a comparative example. In Table 4, sample No. 6 is a joint tube having a taper on the inner peripheral surface and an annular wall at the outer central portion as shown in FIG. 6, and an engagement surface between the outer peripheral taper and the inner peripheral taper of the steel pipe;
This is a case in which liquid phase diffusion bonding is performed using the contact surface between the annular wall surface and the pipe end surface of the steel pipe as a bonding surface. 7
Is a case in which liquid phase diffusion bonding is performed using only the engagement surface of the outer peripheral taper and the inner peripheral taper of the steel pipe as the joining surface.
【００６８】また、表４のサンプルNo．８は図６に示す
ような内周にテーパー面と環状壁を有する継手筒を用
い、その環状壁面（テーパー面）と鋼管の管端面（テー
パー面）の衝接面のみを接合面として液相拡散接合した
比較例である。これら第四の発明の実施例では破断強度
（kN）は３３６０〜３３９０と、管体より高い強度の十
分に満足できる接合部が得られた。In Table 4, the sample No. Numeral 8 uses a joint cylinder having a tapered surface and an annular wall on the inner periphery as shown in FIG. 6, and using only the contact surface between the annular wall surface (tapered surface) and the pipe end surface (tapered surface) of the steel pipe as a joining surface. This is a comparative example in which diffusion bonding is performed. In the examples of the fourth invention, the rupture strength (kN) was 3360 to 3390, and a sufficiently satisfactory joint having a strength higher than that of the tubular body was obtained.
【００６９】（５）表５は、第三の発明と第四の発明の
実施例において、継手筒の環状壁と管の端面の衝接面の
みを接合面として接合した場合の鋼管の曲げ試験結果を
示したものである。表５のサンプルNo．１，２は図３に
示すような第三の発明の実施例であり、表５のサンプル
No．３，４は図５に示すような第四の発明の実施例であ
る。いずれも継手筒の環状壁と鋼管の管端面の衝接面の
みを接合面として液相拡散接合しているが、鋼管の管端
部の外周テーパーと継手筒の内周テーパーとの係合面の
長さを鋼管の直径の０．５〜１．０倍にすることにより
鋼管本体以上の曲げ強度を有する接合部が得られた。(5) Table 5 shows a bending test of a steel pipe in a case where only the contact surface between the annular wall of the joint cylinder and the end face of the pipe is used as a bonding surface in the third and fourth embodiments of the present invention. It shows the results. Sample No. of Table 5 1 and 2 are embodiments of the third invention as shown in FIG.
No. 3 and 4 are embodiments of the fourth invention as shown in FIG. In both cases, liquid phase diffusion bonding is performed using only the contact surface between the annular wall of the joint tube and the pipe end surface of the steel tube as a joint surface, but the engagement surface between the outer peripheral taper of the tube end of the steel tube and the inner peripheral taper of the joint tube By making the length 0.5 to 1.0 times the diameter of the steel pipe, a joint having bending strength equal to or greater than the steel pipe main body was obtained.
【００７０】（６）表６は、第五の発明の実施例を示し
たものである。サンプルNo．１〜４は図７に示すよう
に、一方の金属管の外周テーパーと、他方の金属管の拡
管部内周テーパーとを接合した場合のものであり、破断
強度（kN）は３３５０〜３３９０と、鋼管本体より高い
強度の十分に満足できる接合部が得られた。(6) Table 6 shows an embodiment of the fifth invention. Sample No. As shown in FIG. 7, Nos. 1 to 4 are obtained by joining the outer peripheral taper of one metal pipe and the inner peripheral taper of the expanded portion of the other metal pipe, and have a breaking strength (kN) of 3350 to 3390; A fully satisfactory joint of higher strength than the steel pipe body was obtained.
【００７１】なお、本発明は、上記の例に限定されるも
のではなく、炭素鋼の他、ステンレス鋼、その他の合金
鋼からなる金属管を接合対象とする液相拡散接合にも適
用できるものであり、液相拡散接合条件（加熱温度、圧
縮応力負荷、接合面形状等）、スリーブ、加熱装置、押
圧装置等の接合装置構成等については、接合対象管の材
質および特性、接合材の材質、要求される接合部特性等
に応じて、本発明の範囲内で変更されるものである。The present invention is not limited to the above example, but may be applied to liquid phase diffusion bonding to metal pipes made of stainless steel and other alloy steels in addition to carbon steel. Regarding the liquid phase diffusion bonding conditions (heating temperature, compressive stress load, bonding surface shape, etc.), the configuration of the bonding device such as the sleeve, heating device, pressing device, etc., the material and characteristics of the pipe to be bonded and the material of the bonding material It is changed within the scope of the present invention according to the required joint characteristics and the like.
【００７２】[0072]
【発明の効果】本発明の液相拡散接合部構造において
は、接合対象の金属管を管同士または継手筒を介して加
熱、圧縮して液相拡散接合する場合の接合面を互いに接
するテーパー面（環状壁面）とし、目違いや段差、軸心
のずれの発生を防止して広い接合面に介在させた接合材
を均一に密着させ、強固な接合部を安定確保することが
できる。According to the liquid-phase diffusion bonding structure of the present invention, the joining surfaces in the case where the liquid-phase diffusion bonding is performed by heating and compressing the metal pipes to be bonded through the pipes or the joint cylinder to make the liquid-phase diffusion bonding contact each other. (Circular wall surface) to prevent the occurrence of misalignments, steps, and misalignment of the axis, to uniformly adhere the bonding material interposed on the wide bonding surface, and to stably secure a strong bonding portion.
【図１】本発明の金属管の液相拡散接合部構造例（第一
の発明例）と用いる装置例を概念的に示す側断面説明
図。FIG. 1 is an explanatory side sectional view conceptually showing an example of a liquid-phase diffusion bonding portion structure of a metal tube of the present invention (first invention example) and an example of an apparatus to be used.
【図２】本発明の金属管の液相拡散接合部構造例（第二
の発明例）を概念的に示す側断面説明図。FIG. 2 is an explanatory side sectional view conceptually showing an example of a liquid phase diffusion bonding portion structure (second invention example) of a metal tube of the present invention.
【図３】本発明の金属管の液相拡散接合部構造例（第三
の発明の第１例）を概念的に示す側断面説明図。FIG. 3 is an explanatory side sectional view conceptually showing an example of a liquid phase diffusion bonding portion structure (first example of the third invention) of the metal tube of the present invention.
【図４】本発明の金属管の液相拡散接合部構造例（第三
の発明の第２例）を概念的に示す側断面説明図。FIG. 4 is an explanatory side sectional view conceptually showing an example of a liquid phase diffusion bonding portion structure (second example of the third invention) of the metal tube of the present invention.
【図５】本発明の金属管の液相拡散接合部構造例（第四
の発明の第１例）を概念的に示す側断面説明図。FIG. 5 is an explanatory side sectional view conceptually showing an example of a liquid phase diffusion bonding portion structure (first example of the fourth invention) of the metal tube of the present invention.
【図６】本発明の金属管の液相拡散接合部構造例（第四
の発明の第２例）を概念的に示す側断面説明図。FIG. 6 is an explanatory side sectional view conceptually showing an example of a liquid-phase diffusion bonding portion structure (second example of the fourth invention) of the metal tube of the present invention.
【図７】本発明の金属管の液相拡散接合部構造例（第五
の発明例）を概念的に示す側断面説明図。FIG. 7 is an explanatory side sectional view conceptually showing an example of a liquid phase diffusion bonding portion structure (fifth invention example) of a metal tube of the present invention.
【図８】金属管と金属管の接合面における目違いの状態
を示す側断面説明図。FIG. 8 is an explanatory side sectional view showing a state of misalignment at a joint surface between a metal pipe and a metal pipe.
【図９】金属管と金属管の接合面における軸心ずれの状
態を示す側断面説明図。FIG. 9 is an explanatory side sectional view showing a state of misalignment of an axial center in a joining surface between a metal pipe and a metal pipe.
１ａ，１ｂ 金属管 １ｔ 外周テーパー面 ２ 継手筒 ２ｔ 内周テーパー面 ２ｗ 環状壁 ３，３ａ，３ｂ 接合材（非晶質金属箔） ４ 加熱装置 ５ 押圧装置 ５ｃ クランプ機構 ５ｐ 圧縮応力付与機構 ６ａ，６ｂ 金属管 ６ｔ 内周テーパー面 ７ 継手筒 ７ｔ 外周テーパー面 ７ｗ 環状壁 ８ 金属管 ８ｔ 外周テーパー面 ９ （端部拡管）金属管 ９ｔ 内周テーパー面 ９ｐ 端部（切削加工部） 1a, 1b Metal pipe 1t Outer peripheral taper surface 2 Joint cylinder 2t Inner peripheral taper surface 2w Annular wall 3, 3a, 3b Joining material (amorphous metal foil) 4 Heating device 5 Pressing device 5c Clamping mechanism 5p Compressive stress applying mechanism 6a, 6b Metal tube 6t Inner peripheral taper surface 7 Joint cylinder 7t Outer peripheral taper surface 7w Annular wall 8 Metal tube 8t Outer peripheral taper surface 9 (end expansion) Metal tube 9t Inner peripheral taper surface 9p End (cutting part)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 尾崎 茂克 千葉県富津市新富20−１ 新日本製鐵株式 会社技術開発本部内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigekatsu Ozaki 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Division
Claims (6)
手筒と金属管、または相対する金属管端面同士との間に
配した接合材を液相拡散させて金属管同士を接合した金
属管の液相拡散接合部構造において、端面方向に縮径す
る外周テーパーを管端部に設けた金属管と、端面方向に
拡径する内周テーパーを該外周テーパーと接するように
設けた継手筒との間を液相拡散接合面としたことを特徴
とする金属管の液相拡散接合部構造。1. A metal pipe is inserted from both sides of a joint tube, and a joining material disposed between the joint tube and the metal tube or an end face of the opposed metal tube is subjected to liquid phase diffusion to join the metal tubes. In the liquid-phase diffusion bonding structure of a metal pipe, a metal pipe provided with an outer peripheral taper that reduces the diameter in the end face direction at the pipe end, and a joint provided with an inner taper that increases the diameter in the end face direction so as to be in contact with the outer taper A liquid-phase diffusion joint structure for a metal tube, wherein a liquid-phase diffusion joint surface is provided between the cylinder and the cylinder.
手筒と金属管、または相対する金属管端面同士との間に
配した接合材を液相拡散させて金属管同士を接合した金
属管の液相拡散接合部構造において、端面方向に拡径す
る内周テーパーを管端部に設けた金属管と、端面方向に
縮径する外周テーパーを該内周テーパーと接するように
設けた継手筒との間を液相拡散接合面としたことを特徴
とする金属管の液相拡散接合部構造。2. A joint tube is inserted into a tube end of a metal tube, and a joining material disposed between the joint tube and the metal tube or an end face of the opposing metal tube is subjected to liquid phase diffusion to form a joint between the metal tubes. In the liquid-phase diffusion bonding structure of the joined metal pipes, a metal pipe provided with an inner peripheral taper increasing in diameter in the end face direction at an end of the pipe, and an outer taper reducing diameter in the end face direction contact with the inner peripheral taper. A liquid-phase diffusion bonding structure for a metal pipe, wherein a liquid-phase diffusion bonding surface is provided between the provided joint cylinder and the joint pipe.
手筒と金属管との間に配した接合材を液相拡散させて金
属管同士を接合した金属管の液相拡散接合部構造におい
て、端面方向に縮径する外周テーパーを管端部に設けた
金属管と、端面方向に拡径する内周テーパーを該外周テ
ーパーに接するように設けた継手筒との間、および／ま
たは、継手筒の内側中央部に形成した環状壁と金属管の
管端面との間を液相拡散接合の接合面としたことを特徴
とする金属管の液相拡散接合部構造。3. A liquid-phase diffusion joining portion of a metal pipe in which a metal pipe is inserted from both sides of a joint pipe and a joining material disposed between the joint pipe and the metal pipe is liquid-phase diffused to join the metal pipes to each other. In the structure, between a metal pipe provided with an outer peripheral taper reducing the diameter in the end face direction at the pipe end, and a joint cylinder provided with an inner peripheral taper increasing the diameter in the end face direction in contact with the outer taper, and / or A liquid-phase diffusion bonding structure for a metal pipe, wherein a liquid-phase diffusion bonding joint surface is formed between an annular wall formed at an inner central portion of the joint tube and a pipe end face of the metal pipe.
手筒と金属管との間に配した接合材を液相拡散させて金
属管同士を接合した金属管の液相拡散接合部構造におい
て、端面方向に拡径する内周テーパーを管端部に設けた
金属管と、端面方向に縮径する外周テーパーを該内周テ
ーパーと接するように設けた継手筒との間、および／ま
たは、継手筒の外側中央部に形成した環状壁と金属管の
管端面との間を液相拡散接合の接合面としたことを特徴
とする金属管の液相拡散接合部構造。4. A liquid-phase diffusion of a metal pipe in which metal pipes are joined by inserting a joint pipe into a pipe end of the metal pipe and performing liquid-phase diffusion of a joining material disposed between the joint pipe and the metal pipe. In the joint structure, between the metal pipe provided with an inner peripheral taper that increases in diameter in the end face direction at the pipe end, and a joint tube provided with an outer taper that reduces in diameter in the end face direction so as to be in contact with the inner peripheral taper, And / or a liquid-phase diffusion bonding structure for a metal pipe, wherein a liquid-phase diffusion bonding surface is provided between an annular wall formed at an outer central portion of the joint cylinder and a pipe end face of the metal pipe.
接合材を介して液相拡散接合した金属管の液相拡散接合
部構造において、端面方向に縮径する外周テーパーを管
端部に設けた一方の金属管と、端面方向に拡径する内周
テーパーを該外周テーパーに接するように、拡管した管
端部に設けた他方の金属管との間を液相拡散接合の接合
面としたことを特徴とする金属管の液相拡散接合部構
造。5. In a liquid-phase diffusion bonding structure of a metal pipe in which a pipe end is expanded and a metal pipe is liquid-phase diffusion-bonded to another pipe via a bonding material, an outer peripheral taper whose diameter is reduced in an end face direction is provided. Liquid phase diffusion bonding between one metal pipe provided at the end of the pipe and the other metal pipe provided at the end of the expanded pipe such that an inner peripheral taper expanding in diameter in the end face direction is in contact with the outer taper. A liquid-phase diffusion joint structure for a metal tube, characterized in that the joint surface is made of:
する請求項１〜５のいずれかに記載の液相拡散接合部構
造。6. The liquid-phase diffusion bonding structure according to claim 1, wherein the bonding material is an amorphous metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24087996A JP3650486B2 (en) | 1996-09-11 | 1996-09-11 | Liquid phase diffusion joint structure of metal pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24087996A JP3650486B2 (en) | 1996-09-11 | 1996-09-11 | Liquid phase diffusion joint structure of metal pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1085954A true JPH1085954A (en) | 1998-04-07 |
| JP3650486B2 JP3650486B2 (en) | 2005-05-18 |
Family
ID=17066065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24087996A Expired - Fee Related JP3650486B2 (en) | 1996-09-11 | 1996-09-11 | Liquid phase diffusion joint structure of metal pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3650486B2 (en) |
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|---|---|---|---|---|
| WO2010024261A1 (en) | 2008-08-27 | 2010-03-04 | 新日本製鐵株式会社 | Liquid phase diffusion bonding pipe joint and manufacturing method therefor |
| JP2012255351A (en) * | 2011-06-07 | 2012-12-27 | Toyota Motor Corp | Variable valve mechanism of internal combustion engine |
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| JP2015017881A (en) * | 2013-07-10 | 2015-01-29 | 三菱重工業株式会社 | Radioactive substance storage container |
-
1996
- 1996-09-11 JP JP24087996A patent/JP3650486B2/en not_active Expired - Fee Related
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|---|---|---|---|---|
| WO2010024261A1 (en) | 2008-08-27 | 2010-03-04 | 新日本製鐵株式会社 | Liquid phase diffusion bonding pipe joint and manufacturing method therefor |
| EP2332686A1 (en) * | 2008-08-27 | 2011-06-15 | Nippon Steel Corporation | Liquid phase diffusion bonding pipe joint and manufacturing method therefor |
| CN102131611A (en) * | 2008-08-27 | 2011-07-20 | 新日本制铁株式会社 | Liquid phase diffusion bonding pipe joint and manufacturing method therefor |
| JP4782242B2 (en) * | 2008-08-27 | 2011-09-28 | 新日本製鐵株式会社 | Liquid phase diffusion bonded pipe joint and manufacturing method thereof |
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| EP2332686A4 (en) * | 2008-08-27 | 2017-04-05 | Nippon Steel & Sumitomo Metal Corporation | Liquid phase diffusion bonding pipe joint and manufacturing method therefor |
| JP2013542077A (en) * | 2010-10-01 | 2013-11-21 | ローズマウント インコーポレイテッド | Method for certifying a welding process on a test block and production workpiece for use in the welding process |
| JP2012255351A (en) * | 2011-06-07 | 2012-12-27 | Toyota Motor Corp | Variable valve mechanism of internal combustion engine |
| JP2015017881A (en) * | 2013-07-10 | 2015-01-29 | 三菱重工業株式会社 | Radioactive substance storage container |
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| Publication number | Publication date |
|---|---|
| JP3650486B2 (en) | 2005-05-18 |
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