JPH067967A - Diffusion welding method for high alloy steel oil well pipe - Google Patents
Diffusion welding method for high alloy steel oil well pipeInfo
- Publication number
- JPH067967A JPH067967A JP13913992A JP13913992A JPH067967A JP H067967 A JPH067967 A JP H067967A JP 13913992 A JP13913992 A JP 13913992A JP 13913992 A JP13913992 A JP 13913992A JP H067967 A JPH067967 A JP H067967A
- Authority
- JP
- Japan
- Prior art keywords
- joint
- alloy steel
- joining
- high alloy
- oil well
- 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.)
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Links
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- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高合金鋼油井管の接合
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining high alloy steel oil country tubular goods.
【０００２】[0002]
【従来の技術】石油掘削用の鋼管（油井管）は、厳しい
腐食環境と高い応力に耐えうる耐食性と強度が求めら
れ、用途に応じて炭素鋼から高Ni合金鋼まで様々な材料
が開発されている。特に、高濃度のH2S 、CO2 を含む厳
しい環境では、Niを30％以上含む高Cr、高Mo合金鋼に代
表される耐食性材料が必要となる。このような高Ni合金
鋼はオーステナイト組織であるため、固溶化熱処理のま
までは強度が低いので、通常、冷間加工により強化して
用いられている。2. Description of the Related Art Steel pipes for oil drilling (oil well pipes) are required to have corrosion resistance and strength capable of withstanding a severe corrosive environment and high stress, and various materials such as carbon steel and high Ni alloy steel have been developed according to the application. ing. Particularly in a severe environment containing high concentrations of H 2 S and CO 2 , a corrosion resistant material typified by high Cr and high Mo alloy steel containing 30% or more of Ni is required. Since such a high Ni alloy steel has an austenite structure, it has a low strength when it is solution-treated, and therefore it is usually used by being strengthened by cold working.
【０００３】石油掘削時には、土中に掘られた深さ数千
メートルの縦穴の中に、長さ10〜15メートルの鋼管をネ
ジにより順次結合しながら埋設していく。この場合、ネ
ジ部の強度及び耐食性の確保が、油井管の信頼性を支配
することとなるため、従来、ネジ部の開発には多大な努
力が払われている。例えば、特開昭60-205091 、特開昭
61-88089の各号公報に示される継手やその製造方法はそ
の一例である。At the time of oil drilling, steel pipes having a length of 10 to 15 meters are buried in a vertical hole having a depth of several thousand meters, which is dug in the soil, while being successively coupled with screws. In this case, securing the strength and corrosion resistance of the threaded portion governs the reliability of the oil country tubular good, so that much effort has been conventionally made to develop the threaded portion. For example, JP-A-60-205091, JP-A-60-205091
The joints and their manufacturing methods shown in the respective publications of 61-88089 are examples thereof.
【０００４】一方、ネジ継手に代わる接合法として、溶
接法や拡散接合法が考えられる。採掘された原油を輸送
するラインパイプ用の高Niクラッド鋼管の接合法として
は、特開平03-86367号公報に示される方法がある。これ
は、Cr、Si、Ｂを含む低融点の金属薄帯をインサート
し、加熱加圧して接合する方法である。しかし、石油掘
削用の高合金鋼油井管に対して拡散接合法が用いられた
例はない。On the other hand, welding methods and diffusion bonding methods are conceivable as alternatives to the screw joints. As a method for joining a high Ni clad steel pipe for a line pipe that transports mined crude oil, there is a method disclosed in Japanese Patent Laid-Open No. 03-86367. This is a method in which a metal ribbon having a low melting point containing Cr, Si, and B is inserted, and heated and pressed to bond them. However, there is no case where the diffusion bonding method is used for the high alloy steel oil country tubular good for oil drilling.
【０００５】[0005]
【発明が解決しようとする課題】高合金鋼油井管の結合
にネジ継手を用いると、以下の問題点が生ずる。If a threaded joint is used to connect the high alloy steel oil country tubular goods, the following problems will occur.
【０００６】1)精密なネジを切る必要があるため、多大
なコストを要する。1) Since it is necessary to cut a precise screw, a great cost is required.
【０００７】2)ネジ締め時の締め付け力にバラツキが生
じるので、ネジ部の信頼性確保のためには作業者の熟練
を必要とする。2) Since the tightening force at the time of tightening a screw varies, it is necessary for a worker to be skilled in order to secure the reliability of the screw part.
【０００８】3)運搬時にネジ部が損傷を受けやすい。3) The screw portion is easily damaged during transportation.
【０００９】一方、ネジ継手に代わる結合法として、高
合金鋼油井管に拡散接合法を適用する際には、接合時に
加熱された領域で軟化が生じ、強度低下が起こりやすい
という問題点がある。On the other hand, when the diffusion welding method is applied to the high alloy steel oil country tubular goods as a joining method instead of the screw joint, there is a problem that softening occurs in a heated region at the time of joining and the strength is apt to decrease. .
【００１０】本発明の課題は、上記のネジを使用するこ
とによる問題点を解消し、さらに、接合部の強度低下が
起こらない高合金鋼油井管の拡散接合方法を提供するこ
とにある。An object of the present invention is to solve the problems caused by using the above-mentioned screw, and further to provide a diffusion bonding method for a high alloy steel oil country tubular good in which the strength of the joint does not decrease.
【００１１】[0011]
【課題を解決するための手段】上述のような接合部の強
度低下の問題を解決するためには、予め、接合対象とな
る鋼管に従来以上の冷間加工を加えて、接合継手部の必
要耐力との関係に基づく一定の関係式から求められる耐
力以上に強化し、さらに、加熱領域を小さくして、熱影
響による軟化領域の幅を抑えることが有効であることを
知見した。In order to solve the above-mentioned problem of the strength reduction of the joint, it is necessary to previously subject the steel pipes to be joined to cold working to obtain a joined joint. We have found that it is effective to strengthen beyond the proof stress obtained from a certain relational expression based on the relationship with the proof stress, and further to reduce the heating area to suppress the width of the softened area due to the heat effect.
【００１２】本発明の要旨は、次の方法にある。The gist of the present invention lies in the following method.
【００１３】融点が1150℃以下のインサート材を用いる
高合金鋼油井管の拡散接合方法であって、高合金鋼油井
管に予め冷間加工を施してその耐力を（1.3 Ｘ−10)kgf
/mm2以上としておくこと、接合時に 800℃以上に加熱さ
れる接合部の接合界面を挟む領域を20mm以下とするこ
と、上記接合部の領域の加熱を1200〜1280℃で120 秒以
上の保持によって行うこと、接合時の加圧力を 0.5〜２
kgf/mm2 とすること及びインサート材の厚さを10〜80μ
m とすることを特徴とする高合金鋼油井管の拡散接合方
法。A diffusion joining method for high alloy steel oil country tubular goods using an insert material having a melting point of 1150 ° C. or less, wherein the high alloy steel oil country tubular goods are cold worked in advance to obtain a proof stress of (1.3 X-10) kgf.
/ mm 2 or more, the area that sandwiches the joint interface of the joint that is heated to 800 ° C or more during joining is 20 mm or less, and the heating of the above-mentioned joint area is maintained at 1200 to 1280 ° C for 120 seconds or more The pressure applied during joining is 0.5 to 2
kgf / mm 2 and insert material thickness 10 to 80μ
A diffusion welding method for high alloy steel oil country tubular goods characterized by having m.
【００１４】ただし、Ｘは接合の対象となる油井管の接
合継手部に必要とされる耐力(kgf/mm2 ）である。However, X is the proof stress (kgf / mm 2 ) required for the joint joint of the oil country tubular goods to be joined.
【００１５】[0015]
【作用】本発明の方法の対象となる高合金鋼油井管は、
高濃度のH2S 、CO2 を含む厳しい環境での使用に耐えう
る特性を有する高Ni−高Cr−Mo系の鋼管である。The high alloy steel oil country tubular goods to which the method of the present invention is applied are
It is a high Ni-high Cr-Mo steel pipe that has the characteristics to withstand use in harsh environments containing high concentrations of H 2 S and CO 2 .
【００１６】インサート材は、その成分が、例えば表１
に示すような、Cr：５％以上、Mo：０もしくは９％以
下、Si：８％、Ｂ：４％以下を含有し、残部がNiから成
る、溶湯から急冷凝固した薄帯のものを用いる。そし
て、その融点が1150℃以下になるのであれば、ＢとSiの
含有量の合計が12％を超えない範囲で、これらの含有量
を変えてもよい。The composition of the insert material is, for example, as shown in Table 1.
As shown in Fig. 5, a thin ribbon containing Cr: 5% or more, Mo: 0 or 9% or less, Si: 8%, B: 4% or less and the balance of Ni, which is rapidly solidified from a molten metal, is used. . Then, if the melting point is 1150 ° C. or lower, the contents of B and Si may be changed within the range of not exceeding 12%.
【００１７】[0017]
【表１】 [Table 1]
【００１８】次に、接合の対象となる母材鋼管、加熱お
よび接合の各条件を、本発明の範囲に定めた理由を説明
する。Next, the reason why the respective conditions of the base material steel pipe to be joined and the heating and joining are set within the scope of the present invention will be explained.
【００１９】(1) 母材鋼管の冷間加工による耐力（強
度）向上 後述するように、 800℃以上に加熱されて軟化が生じる
領域を抑えることと、母材を予め冷間加工して強化する
ことを組合せて、接合後の接合継手部の耐力を確保する
ためには、接合継手部の必要耐力をＸkgf/mm2 とする
と、母材の耐力は、予め（1.3 Ｘ−10)kgf/mm2以上に強
化しておかなければならない。（1.3 Ｘ−10)kgf/mm2未
満であると、接合継手部の耐力が必要耐力Ｘを下回るこ
とになる。(1) Improving proof strength (strength) by cold working of base material steel pipe As will be described later, the area where softening is caused by heating above 800 ° C. is suppressed, and the base material is cold worked and strengthened in advance. In order to secure the yield strength of the joined joint after joining, the required yield strength of the joined joint is set to Xkgf / mm 2, and the yield strength of the base material is (1.3 X-10) kgf / It must be reinforced to mm 2 or more. If it is less than (1.3 X-10) kgf / mm 2 , the yield strength of the bonded joint portion will be less than the required yield strength X.
【００２０】予め母材強度をこの所要強度以上に強化し
ておくことにより、冷間加工で強化された母材の一部が
加熱により軟化しても、接合継手部の耐力は冷間加工前
の値まで低下することがなく、加熱後も十分な強度を維
持できる。By strengthening the base metal strength in advance to the required strength or more, even if a part of the base metal reinforced by cold working is softened by heating, the proof stress of the joint joint is before cold working. It is possible to maintain sufficient strength even after heating without decreasing to the value of.
【００２１】(2)800℃以上に加熱される加熱領域 接合時の加熱による軟化は 800℃以上で生ずるので、 8
00℃以上に加熱される領域を接合界面を中心とする両側
の幅の合計で20mm以下に抑えることにより、接合後の継
手部の耐力低下を最小限の幅に抑えることができる。接
合継手部の一部に軟化領域が存在していても、その領域
が狭ければ引張荷重を受けた場合に周囲の高強度領域で
軟化領域の塑性変形が拘束（塑性拘束）されるからであ
る。(2) Heating area heated to 800 ° C or higher Since softening due to heating at the time of bonding occurs at 800 ° C or higher,
By suppressing the total width of both sides centering on the bonding interface to 20 mm or less in the region heated to 00 ° C or higher, it is possible to suppress the decrease in yield strength of the joint after bonding to the minimum width. Even if there is a softened region in a part of the welded joint, if the region is narrow, the plastic deformation of the softened region is constrained (plastic constraint) in the surrounding high-strength region when a tensile load is applied. is there.
【００２２】この領域が20mmを超えると、加熱による軟
化領域の幅が拡がり、引張荷重を受けた際の塑性変形を
周囲の高強度領域で拘束するという強化の効果が損なわ
れ、接合継手部の耐力が低下するという問題が発生す
る。If this area exceeds 20 mm, the width of the softened area due to heating widens, and the effect of strengthening that the plastic deformation when a tensile load is applied is restricted by the surrounding high strength area is impaired, and There is a problem that the yield strength is reduced.
【００２３】具体的には、接合部を加熱するための装置
の幅を20mmまでに抑えるとともに、可能な限り、例えば
被接合鋼管の片側各10mm以下となるように接合界面から
同一幅とすることが望ましい。さらに加熱時には、接合
部を加熱する装置の両側に位置する部分に、高熱伝導性
の材料で作られた鋼管冷却用の水冷ジャケットを装着し
て、加熱装置の外側の鋼管部分の熱伝導による温度上昇
や加熱領域の拡大を抑えるように配慮しなければならな
い。Specifically, the width of the device for heating the joint is limited to 20 mm, and as much as possible, for example, the same width from the joint interface is set so that each side of the steel pipe to be welded is 10 mm or less on each side. Is desirable. During heating, the water cooling jackets for cooling the steel pipes made of highly heat-conductive material are attached to the parts located on both sides of the device that heats the joint, and the temperature due to the heat conduction of the steel pipe parts outside the heating device is attached. Care must be taken to limit the rise and expansion of the heating area.
【００２４】(3) 加熱および接合条件 加熱温度：1200℃未満では、短時間で十分な接合ができ
ない。1280℃を超えると接合部の変形が大となり、加熱
コイルが破損することがある。(3) Heating and joining conditions Heating temperature: If the heating temperature is less than 1200 ° C, sufficient joining cannot be achieved in a short time. If the temperature exceeds 1280 ° C, the deformation of the joint becomes large and the heating coil may be damaged.
【００２５】加熱保持時間：接合界面での密着性を確保
し、さらにインサート材中の元素を十分に拡散させ、接
合層の化学組成を母材と近いものにして、接合強度及び
に耐食性を確保するためには、少なくとも 120秒以上の
加熱保持時間が必要である。Heating / holding time: Adhesion at the bonding interface is secured, elements in the insert material are sufficiently diffused, and the chemical composition of the bonding layer is close to that of the base material to secure bonding strength and corrosion resistance. In order to do so, a heating and holding time of at least 120 seconds or more is required.
【００２６】上限は、特に規定する必要はないが、長時
間の加熱保持は不経済になるだけである。The upper limit does not have to be specified in particular, but holding for a long time by heating only becomes uneconomical.
【００２７】加圧力：接合による密着性を確保するため
には、 0.5kgf/mm2 以上の加圧力が必要である。一方、
２kgf/mm2 を超えると接合部の変形が大きくなりすぎ
る。Pressurizing force: In order to secure adhesion by joining, a pressing force of 0.5 kgf / mm 2 or more is required. on the other hand,
If it exceeds 2 kgf / mm 2 , the deformation of the joint becomes too large.
【００２８】(4) インサート材の厚さ 10μm 未満では、接合界面の凹凸部を完全に埋め切れな
いため、接合強度の低下を招く。一方、80μm を超える
と、Si、Ｂの拡散に長時間の加熱を要するため、接合能
率を低下させる。また、このような厚いインサート材を
用いた短時間の加熱では、Si、Ｂが接合層中に偏析し、
接合部の耐食性を維持できない。(4) If the thickness of the insert material is less than 10 μm, the irregularities at the joint interface cannot be completely filled, resulting in a decrease in joint strength. On the other hand, if the thickness exceeds 80 μm, it takes a long time to diffuse Si and B, so that the bonding efficiency is lowered. In addition, when heating for a short time using such a thick insert material, Si and B segregate in the bonding layer,
The corrosion resistance of the joint cannot be maintained.
【００２９】[0029]
【実施例】表２に示す、Ni：30％以上、Cr：20％以上、
Mo：２％以上、Ti： 1.2％を主成分とする３種類の高合
金鋼油井管を供試材として、接合テストを行い、接合部
の性能を評価した。[Example] As shown in Table 2, Ni: 30% or more, Cr: 20% or more,
A joint test was performed using three types of high alloy steel oil country tubular goods containing Mo: 2% or more and Ti: 1.2% as main components, and the joint performance was evaluated.
【００３０】供試材は、外径 130mm、厚さ 15mm のシー
ムレス鋼管とし、1100℃で固溶熱処理後冷間抽伸を行
い、その際の冷間加工度を変えることにより耐力の異な
る供試材鋼管を作製した。これらの鋼管の耐力および接
合継手部の必要耐力を表３に示す。The test material is a seamless steel tube with an outer diameter of 130 mm and a thickness of 15 mm, and solid drawing heat treatment at 1100 ° C. is followed by cold drawing to change the cold workability. A steel pipe was produced. Table 3 shows the yield strengths of these steel pipes and the required yield strengths of the joints.
【００３１】インサート材は、表１に示す２種類の成分
と表４に示す厚さの、溶湯から急冷凝固した薄帯のもの
を用いた。As the insert material, a thin strip having two kinds of components shown in Table 1 and thicknesses shown in Table 4 which was rapidly solidified from molten metal was used.
【００３２】接合システムは、図１に示すように、銅製
の１ターンの加熱コイル兼ガスシールド治具１およびそ
の両外側に、鋼管２の冷却用ジャケット３、加圧用クラ
ンプ４から成る接合用ヘッドと高周波電源５、制御盤６
により構成されているものを用いた。そして、 800℃以
上に加熱される加熱領域は、加熱コイルの幅を10〜50mm
と変え、さらに、その外側の鋼管２の冷却用ジャケット
３( このジャケットは、鋼管２に接触させて、ジャケッ
ト内部に冷却水を循環するもの。) の冷却能を変えるこ
とにより変化させた。As shown in FIG. 1, the joining system comprises a joining head comprising a copper-made one-turn heating coil and gas shield jig 1 and cooling jackets 3 for steel pipes 2 and clamps 4 on both outsides thereof. And high frequency power supply 5, control panel 6
Was used. And the heating area heated to 800 ℃ or more, the width of the heating coil is 10 to 50mm.
In addition, the cooling capacity of the cooling jacket 3 of the steel pipe 2 on the outer side (this jacket is for contacting the steel pipe 2 to circulate cooling water inside the jacket) is changed.
【００３３】加圧は、供試材鋼管をクランプし、熱膨
張反力を利用して、接合面を加圧する方式( クランプに
スプリングを入れて、熱膨張反力の一部を逃して、加圧
力を調整する。) 、油圧により外部から加圧力を与え
る方式の両者を用いた。The pressure is applied by clamping the steel pipe under test and using the thermal expansion reaction force to apply pressure to the joint surface (a spring is placed in the clamp to release a part of the thermal expansion reaction force and apply it. The pressure is adjusted.) And the method of applying a pressing force from the outside by hydraulic pressure was used.
【００３４】鋼管を突合わせて、接合界面にインサート
材を入れ、加熱保持と加圧を行って接合し、接合された
鋼管から図２、図３に示す試験片を採取し、引張り試
験、応力腐食割れ（ＳＣＣ）試験を行い評価した。The steel pipes are butted, the insert material is put in the joint interface, they are joined by heating and holding and pressurization, and the test pieces shown in FIGS. 2 and 3 are taken from the joined steel pipes, and the tensile test and the stress test are conducted. A corrosion cracking (SCC) test was conducted and evaluated.
【００３５】ＳＣＣ試験としては、油井を模擬した 150
℃、25％ NaCl ＋ 0.5％CH3COOH ＋７atm H2S の環境中
で、歪速度を４×10-6（1/秒) とする定速引張を行い、
破断時間及び破断後の試験片内の二次亀裂( ＳＣＣによ
って発生）の有無を調べた。As an SCC test, an oil well simulated 150
In the environment of ℃, 25% NaCl + 0.5% CH 3 COOH + 7 atm H 2 S, constant speed tension with a strain rate of 4 × 10 -6 (1 / sec) was performed.
The rupture time and the presence or absence of a secondary crack (generated by SCC) in the test piece after the rupture were examined.
【００３６】接合条件は、加熱温度1200℃、加圧力１kg
f/mm2 、保持時間 300秒で一定とした。The joining conditions are a heating temperature of 1200 ° C. and a pressure of 1 kg.
It was kept constant at f / mm 2 and a holding time of 300 seconds.
【００３７】上記の接合条件および接合後の試験結果を
表４に示す。Table 4 shows the above-mentioned joining conditions and the test results after joining.
【００３８】表３、４から明らかなように、全ての条件
が本発明で定める範囲の試験符号Ａ１〜Ａ６（本発明
例）では、加圧方式の違いによらず、接合継手部の必要
耐力が満たされ、耐食性も良好である。比較例の試験符
号Ｂ１、Ｂ２のように、母材を冷間加工強化しても加熱
領域幅が大きすぎる場合や、同じく試験符号Ｂ３、Ｂ４
のように、加熱領域幅を20mm以下に抑えても、母材の冷
間加工強化が必要耐力を下回る場合では、接合継手部の
耐力は必要耐力を満たさない。同じく試験符号Ｂ５のよ
うに、インサート材厚さが過大な場合では、Si、Ｂが接
合層中に偏析しているので耐食性が劣化し応力腐食割れ
が認められる。As is clear from Tables 3 and 4, in the test codes A1 to A6 (examples of the present invention) in which all conditions are within the range defined by the present invention, the required yield strength of the bonded joint portion is irrespective of the difference in pressurizing method. Is satisfied, and the corrosion resistance is also good. As in the test codes B1 and B2 of the comparative example, when the heating region width is too large even if the base material is cold worked and strengthened, or the test codes B3 and B4 are the same.
As described above, even if the width of the heating region is suppressed to 20 mm or less, if the cold working strengthening of the base material is less than the required yield strength, the yield strength of the bonded joint portion does not satisfy the required yield strength. Similarly, in the case where the thickness of the insert material is excessive as in the test code B5, Si and B are segregated in the bonding layer, so that the corrosion resistance deteriorates and stress corrosion cracking is recognized.
【００３９】[0039]
【表２】 [Table 2]
【００４０】[0040]
【表３】 [Table 3]
【００４１】[0041]
【表４】 [Table 4]
【００４２】[0042]
【発明の効果】本発明の方法によれば、継手部強度（耐
力）が高く、しかも、耐食性を有する高合金鋼油井管の
接合部を得ることができる。According to the method of the present invention, it is possible to obtain a joint portion of a high alloy steel oil country tubular good which has high joint strength (proof strength) and corrosion resistance.
【図１】本発明の接合方法に用いる接合システムを説明
する図である。FIG. 1 is a diagram illustrating a joining system used in a joining method of the present invention.
【図２】接合部の引張試験のための継手試験片を示す図
である。FIG. 2 is a view showing a joint test piece for a tensile test of a bonded portion.
【図３】接合部の応力腐食割れ（ＳＣＣ）試験のための
試験片を示す図である。FIG. 3 is a view showing a test piece for a stress corrosion cracking (SCC) test of a joint portion.
１：加熱コイル兼ガスシールド治具、２：鋼管、３：冷
却用ジャケット ４：クランプ、 ５：高周波電源、 ６：制御盤1: Heating coil and gas shield jig, 2: Steel pipe, 3: Cooling jacket 4: Clamp, 5: High frequency power supply, 6: Control panel
Claims (1)
高合金鋼油井管の拡散接合方法であって、高合金鋼油井
管に予め冷間加工を施してその耐力を（1.3 Ｘ−10)kgf
/mm2以上としておくこと、接合時に 800℃以上に加熱さ
れる接合部の接合界面を挟む領域を20mm以下とするこ
と、上記接合部の領域の加熱を1200〜1280℃で120 秒以
上の保持によって行うこと、接合時の加圧力を 0.5〜２
kgf/mm2 とすること及びインサート材の厚さを10〜80μ
m とすることを特徴とする高合金鋼油井管の拡散接合方
法。ただし、Ｘは接合の対象となる油井管の接合継手部
に必要とされる耐力(kgf/mm2 ）である。1. A diffusion bonding method for a high alloy steel oil country tubular goods using an insert material having a melting point of 1150 ° C. or less, wherein the high alloy steel oil country tubular goods are cold worked in advance to obtain a proof stress (1.3 X-10). kgf
/ mm 2 or more, the area sandwiching the joint interface of the joint that is heated to 800 ° C or more during joining is 20 mm or less, and the heating of the above-mentioned joint area is maintained at 1200 to 1280 ° C for 120 seconds or more The pressure applied during joining is 0.5 to 2
kgf / mm 2 and insert material thickness 10 to 80μ
A diffusion welding method for high alloy steel oil country tubular goods characterized by having m. However, X is the proof stress (kgf / mm 2 ) required for the joint joint of the oil country tubular goods to be joined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13913992A JP2738220B2 (en) | 1992-05-29 | 1992-05-29 | Diffusion bonding method for high alloy steel oil country tubular goods. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13913992A JP2738220B2 (en) | 1992-05-29 | 1992-05-29 | Diffusion bonding method for high alloy steel oil country tubular goods. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH067967A true JPH067967A (en) | 1994-01-18 |
| JP2738220B2 JP2738220B2 (en) | 1998-04-08 |
Family
ID=15238459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13913992A Expired - Fee Related JP2738220B2 (en) | 1992-05-29 | 1992-05-29 | Diffusion bonding method for high alloy steel oil country tubular goods. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2738220B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998022248A1 (en) * | 1996-11-19 | 1998-05-28 | Sumitomo Metal Industries, Ltd. | Method of bonding two-phase stainless steel |
| EP0899050A1 (en) * | 1997-08-29 | 1999-03-03 | Daido Tokushuko Kabushiki Kaisha | Bonding method of dual phase stainless steel |
| US5938389A (en) * | 1996-08-02 | 1999-08-17 | Crown Cork & Seal Technologies Corporation | Metal can and method of making |
| US6059175A (en) * | 1996-03-29 | 2000-05-09 | Sumitomo Metal Industries, Ltd. | Method for joining metallic materials by diffusion bonding and joined structure thereby |
| EP3006155A1 (en) * | 2014-09-08 | 2016-04-13 | "NewTech" Sp. z o.o. | Method of nano-welding of pipes |
-
1992
- 1992-05-29 JP JP13913992A patent/JP2738220B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6059175A (en) * | 1996-03-29 | 2000-05-09 | Sumitomo Metal Industries, Ltd. | Method for joining metallic materials by diffusion bonding and joined structure thereby |
| US5938389A (en) * | 1996-08-02 | 1999-08-17 | Crown Cork & Seal Technologies Corporation | Metal can and method of making |
| WO1998022248A1 (en) * | 1996-11-19 | 1998-05-28 | Sumitomo Metal Industries, Ltd. | Method of bonding two-phase stainless steel |
| US6024276A (en) * | 1996-11-19 | 2000-02-15 | Sumitomo Metal Industries, Ltd. | Method for bonding dual-phase stainless steel |
| EP0899050A1 (en) * | 1997-08-29 | 1999-03-03 | Daido Tokushuko Kabushiki Kaisha | Bonding method of dual phase stainless steel |
| US6156134A (en) * | 1997-08-29 | 2000-12-05 | Daido Tokushuko Kabushiki Kaisha | Bonding method of dual phase stainless steel |
| EP3006155A1 (en) * | 2014-09-08 | 2016-04-13 | "NewTech" Sp. z o.o. | Method of nano-welding of pipes |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2738220B2 (en) | 1998-04-08 |
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