JPH0746095B2 - Ultrasonic flaw detector probe - Google Patents
Ultrasonic flaw detector probeInfo
- Publication number
- JPH0746095B2 JPH0746095B2 JP61123601A JP12360186A JPH0746095B2 JP H0746095 B2 JPH0746095 B2 JP H0746095B2 JP 61123601 A JP61123601 A JP 61123601A JP 12360186 A JP12360186 A JP 12360186A JP H0746095 B2 JPH0746095 B2 JP H0746095B2
- Authority
- JP
- Japan
- Prior art keywords
- probe
- vibrator
- flaw detector
- ultrasonic flaw
- ultrasonic
- 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.)
- Expired - Lifetime
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は超音波探傷装置の探触子に係り、特に探触子の
耐熱許容温度を高めることのできる超音波探傷装置の探
触子に関する。Description: TECHNICAL FIELD The present invention relates to a probe for an ultrasonic flaw detector, and more particularly to a probe for an ultrasonic flaw detector capable of increasing a heat-resistant allowable temperature of the probe. .
［従来の技術］ 近年では構造物の使用期間が長期化するに伴って、構造
物の経年劣化測定に対するニーズが高まっているが、超
音波探傷装置は構造物の疲労余寿命を予測する上で有効
な測定装置である。[Prior Art] In recent years, there is a growing need for measuring aged deterioration of a structure as the service life of the structure is prolonged, and an ultrasonic flaw detector is used to predict the fatigue life of a structure. It is an effective measuring device.
第４図は垂直探傷式の探触子を示したものであり、図示
するように、構造物等の被探傷物ａに探触子ｂが接触媒
質ｃ（例えば水、グリセリン）を介して取り付けられて
いる。FIG. 4 shows a vertical flaw detection type probe. As shown in the figure, the probe b is attached to a flaw detection object a such as a structure via a contact medium c (for example, water or glycerin). Has been.
この探触子ｂは被探傷物ａに接触媒質ｃを介して取り付
けられる保護板ｄに、電極部ｅ（銀を焼付）間に挾まれ
た振動子ｆ（例えばPb（Zr−Ti）O3）が接着剤ｇ（エポ
キシ系樹脂）で接合されて取り付けられている。すなわ
ち、電極部ｅ間に挾まれた振動子ｆが保護板ｄに積層さ
れて形成されている。The probe b is a protective plate d that is attached via a coupling medium c in test object blemished a, vibrator f (e.g. Pb (Zr-Ti) O 3 sandwiched (silver baking) electrode portions e between ) Is bonded and attached with an adhesive g (epoxy resin). That is, the vibrator f sandwiched between the electrode portions e is formed by being stacked on the protective plate d.
［発明が解決しようとする問題点］ ところで、従来の探触子ｂにおいては上述したように、
振動子ｆを含む電極部ｅとこれを保護する保護板ｄとを
接着剤ｇで接合していたが、被探傷物ａがたとえば原子
炉容器のように比較的高温に達する構造物である場合に
保護板ｄ（セラミック）の熱膨張により接着剤ｇが剥離
してしまうことがあった。したがって、従来は探触子ｂ
の耐熱許容限界温度が低く（150〜200℃）、測定範囲が
比較的低温の被探傷物に制限される問題があった。[Problems to be Solved by the Invention] Incidentally, in the conventional probe b, as described above,
When the electrode part e including the oscillator f and the protective plate d for protecting the same are joined by the adhesive g, but the flaw detection object a is a structure reaching a relatively high temperature such as a reactor vessel. In some cases, the adhesive g may peel off due to the thermal expansion of the protective plate d (ceramic). Therefore, conventionally, the probe b
The heat-resistant allowable limit temperature was low (150-200 ℃), and there was a problem that the measurement range was limited to the flawed object whose temperature was relatively low.
そこで、本発明はこの問題点を有効に解決すべく創案さ
れたものであり、探触子の耐熱許容限界温度を高めるこ
とを可能にし、探触子がの使用温度範囲を拡大すること
のできる超音波探傷装置の探触子を提供することを目的
とする。Therefore, the present invention was devised in order to effectively solve this problem, and it is possible to increase the heat-resistant allowable limit temperature of the probe and to expand the operating temperature range of the probe. An object is to provide a probe for an ultrasonic flaw detector.
［問題点を解決するための手段と作用］ 本発明は被探傷物に取り付けられる超音波伝達部材に、
一対の電極間に挾まれた振動子を積層してなる超音波探
傷装置の探触子において、上記振動子をニオブ酸リチウ
ムで形成すると共に、この振動子と超音波伝達部材との
間に、これらを直接アルミ系ろう材で接合してアルミ系
の耐熱性電極槽を形成し、これを上記電極としたもので
ある。[Means and Actions for Solving Problems] The present invention relates to an ultrasonic transmission member attached to a flaw detection object,
In a probe of an ultrasonic flaw detection device formed by stacking a vibrator sandwiched between a pair of electrodes, the vibrator is formed of lithium niobate, and between the vibrator and the ultrasonic transmission member, These are directly joined with an aluminum brazing material to form an aluminum heat resistant electrode tank, which is used as the above electrode.
［実施例］ 以下本発明の実施例を添付図面に従って詳述する。Embodiments Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
第１図に示すように、高温構造物たる原子炉容器等に被
探傷物１が設けられる。As shown in FIG. 1, the flaw detection object 1 is provided in a reactor vessel or the like which is a high temperature structure.
この被探傷物１にはその劣化を測定するための超音波探
傷装置の探触子２が取り付けられている。A probe 2 of an ultrasonic flaw detector for measuring the deterioration is attached to the flaw detection object 1.
本実施例においては接触媒質３（例えばシリコンオイ
ル，溶融金属SbS）を介して探触子２が取り付けられて
いる。In this embodiment, the probe 2 is attached via a contact medium 3 (for example, silicon oil, molten metal SbS).
この探触子２は被探傷物１に上記接触媒質３を挾んで取
り付けられる保護板４と振動子５とから主に構成され、
振動子５にはこれを間に挾んで電極部6a,6bが一体的に
形成されている。The probe 2 is mainly composed of a protective plate 4 and a vibrator 5 which are attached to the flaw detection object 1 with the contact medium 3 interposed therebetween.
Electrode portions 6a and 6b are integrally formed on the vibrator 5 with the vibrator interposed therebetween.
特に、振動子５と保護板４との間の電極部6aはこれら振
動子５と保護板４とを互いに接合する耐熱性電極層Ａを
形成する。この耐熱性電極層Ａはアルミ系のろう材によ
り形成される。In particular, the electrode portion 6a between the vibrator 5 and the protective plate 4 forms a heat resistant electrode layer A for joining the vibrator 5 and the protective plate 4 to each other. The heat resistant electrode layer A is formed of an aluminum brazing material.
具体的にはTic,TiNを分散させたセラミックにより形成
された保護板４と、耐熱性に優れたニオブ酸リチウム
（LiNbO3）により形成された振動子５とがろう材により
互いに一体的に接合されている。また、ろう材にはAl−
Si−Mg合金（Si−11.0〜13.0％、Fe−0.8％以下、Cu−
0.25％以下、Mn−0.10％以下、Mg−1.0〜2.0％以下）が
採用されている。すなわち、振動子５中の酸素をろう中
のAl,Mgで還元し、金属によるろう付を可能にするもの
である。Specifically, a protective plate 4 made of ceramic in which Tic and TiN are dispersed and a vibrator 5 made of lithium niobate (LiNbO 3 ) having excellent heat resistance are integrally joined to each other by a brazing material. Has been done. In addition, Al-
Si-Mg alloy (Si-11.0 to 13.0%, Fe-0.8% or less, Cu-
0.25% or less, Mn-0.10% or less, and Mg-1.0 to 2.0% or less) are adopted. That is, the oxygen in the vibrator 5 is reduced by Al and Mg in the brazing material to enable brazing with a metal.
実験によれば、接合温度を580℃、保持時間を、30分、
加圧力を0.02kgf/mm2で耐熱性電極層Ａを形成したとこ
ろ、探触子２の耐熱許容限界温度を550〜600℃まで高め
られる結果を得た。According to the experiment, the bonding temperature is 580 ° C, the holding time is 30 minutes,
When the heat-resistant electrode layer A was formed at a pressure of 0.02 kgf / mm 2 , the heat-resistant allowable limit temperature of the probe 2 was increased to 550 to 600 ° C.
このように本発明は保護板４と振動子５との間にこれら
を接合するとともに振動子５の電極部6aを形成するアル
ミ系耐熱性電極層Ａを形成することにより、探触子２の
耐熱許容限界温度を大幅に高めることができ、探触子２
の使用温度範囲を拡大できる。As described above, according to the present invention, by joining the protective plate 4 and the vibrator 5 to each other and forming the aluminum-based heat-resistant electrode layer A forming the electrode portion 6a of the vibrator 5, the probe 2 The maximum allowable heat-resistant limit temperature can be significantly increased, and the probe 2
The operating temperature range of can be expanded.
［変形実施例］ 第２図および第３図は本発明の変形例を示したものであ
る。[Modified Embodiment] FIGS. 2 and 3 show a modified embodiment of the present invention.
第２図においては特に超音波を被探傷物１に伝播させる
円柱状の金属材料７を形成し、この金属材料７と振動子
５との間にこれらを一体的に接合する耐熱性電極層Ａを
介在させて探触子２を形成した例を示すものである。こ
れら接合される振動子５および金属材料７は上記実施例
と同様の接合条件のもとに一体的に形成されている。In FIG. 2, in particular, a columnar metal material 7 for propagating ultrasonic waves to the flaw detection object 1 is formed, and a heat-resistant electrode layer A for integrally joining the metal material 7 and the vibrator 5 together. It shows an example in which the probe 2 is formed by interposing. The vibrator 5 and the metal material 7 to be bonded are integrally formed under the bonding conditions similar to those in the above-mentioned embodiment.
また、金属材料７には軟鋼が採用され、この金属材料７
は被探傷物１に対して溶接接合されて取り付けられてい
る。８はその溶接部を示す。Further, mild steel is adopted as the metal material 7,
Is welded and attached to the flaw detection object 1. Reference numeral 8 indicates the welded portion.
このように、被探傷物１に溶接接合して直接探触子２を
取り付けることにより、構造物のモニタリングが可能と
なる。As described above, the structure 2 can be monitored by welding and directly attaching the probe 2 to the flaw detection target 1.
なお、これまでの実施例においては垂直探傷式の探触子
について説明したがこれに限るものでなく、斜角式の探
触子にも応用できるものである。たとえば第３図に示す
ように金属製あるいばセラミック製のくさび９を介して
斜角に探触子２を取り付けるように構成してもよい。It should be noted that although the vertical flaw detection type probe has been described in the above embodiments, the present invention is not limited to this and is also applicable to a bevel angle type probe. For example, as shown in FIG. 3, the probe 2 may be attached at an oblique angle via a wedge 9 made of metal or so-called ceramic.
なお、上記実施例においては、超音波探傷装置の探触子
を説明しているが、これにはアコースティックエミッシ
ョン試験用センサを含んでいる。アコースティックエミ
ッション試験とは、固体が変形あるいは破壊する際に、
それまでに貯えられていたひずみエネルギーが開放され
て発生する超音波を受信して、構造物等を異常を検知す
る方法である。従ってアコースティックエミッション試
験用のセンサの構造はここで示した探触子の構造と全く
同じものである。Although the probe of the ultrasonic flaw detector is described in the above embodiment, it includes a sensor for acoustic emission test. The acoustic emission test is used when a solid is deformed or destroyed.
This is a method of detecting an abnormality in a structure or the like by receiving an ultrasonic wave generated by releasing the strain energy stored until then. Therefore, the structure of the sensor for acoustic emission test is exactly the same as the structure of the probe shown here.
超音波探傷試験では、一般に探触子より超音波を発生さ
せ、これの反射波を受信して測定するのに対して、アコ
ースティックエミッション試験用センサは受信するのみ
なので、試験の目的から両者を区別することもあるが、
両者の構造は全く同等であり、本発明にアコースティッ
クエミッション試験用のセンサをも含むものである。In an ultrasonic flaw detection test, ultrasonic waves are generally generated from a probe and the reflected wave of the ultrasonic waves is received and measured, whereas the acoustic emission test sensor only receives them. Sometimes,
Both structures are completely equivalent, and the present invention also includes a sensor for acoustic emission test.
［発明の効果］ 以上要するのに本発明によれば、保護板あるいは金属材
料と振動子との間にこれらを互いにろう接合する電極層
を形成したので、探触子の耐熱許容限界温度を大幅に高
めることができ、探触子の使用温度範囲が拡大され、信
頼性を向上させることができる。[Advantages of the Invention] In summary, according to the present invention, since the electrode layer for brazing the protective plate or the metal material and the vibrator to each other is formed, the allowable heat resistance limit temperature of the probe is significantly increased. The temperature range of the probe can be expanded, and the reliability can be improved.
第１図は本発明に係る探触子の一実施例を示す概略断面
図、第２図及び第３図は本発明の他の実施例を示す断面
図、第４図は従来の探触子を示す概略断面図である。 図中、１は被探傷物、２は探触子、４は保護板、５は振
動子、6a,6bは電極部、Ａは耐熱性電極層、７は金属材
料である。FIG. 1 is a schematic sectional view showing an embodiment of a probe according to the present invention, FIGS. 2 and 3 are sectional views showing another embodiment of the present invention, and FIG. 4 is a conventional probe. It is a schematic sectional drawing which shows. In the figure, 1 is an object to be detected, 2 is a probe, 4 is a protective plate, 5 is a vibrator, 6a and 6b are electrode parts, A is a heat-resistant electrode layer, and 7 is a metal material.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 熱田 美道 東京都品川区大井１丁目22番13号 石川島 検査計測株式会社内 (56)参考文献 特開 昭59−32297（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Michi Atsuta 1-22-13 Oi, Shinagawa-ku, Tokyo Ishikawajima Inspection & Measurement Co., Ltd. (56) References JP 59-32297 (JP, A)
Claims (1)
に、一対の電極間に挾まされた振動子を積層してなる超
音波探傷装置の探触子において、上記振動子をニオブ酸
リチウムで形成すると共に、この振動子と超音波伝達部
材との間に、これらを直接アルミ系ろう材で接合してア
ルミ系の耐熱性電極槽を形成し、これを上記電極とした
ことを特徴とする超音波探傷装置の探触子。1. A probe of an ultrasonic flaw detector, comprising: an ultrasonic wave transmission member attached to an object to be inspected; and a vibrator sandwiched between a pair of electrodes. In addition to the above, the vibrator and the ultrasonic transmission member are directly joined to each other with an aluminum brazing material to form an aluminum heat resistant electrode tank, which is used as the above electrode. Ultrasonic flaw detector probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61123601A JPH0746095B2 (en) | 1986-05-30 | 1986-05-30 | Ultrasonic flaw detector probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61123601A JPH0746095B2 (en) | 1986-05-30 | 1986-05-30 | Ultrasonic flaw detector probe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62280649A JPS62280649A (en) | 1987-12-05 |
| JPH0746095B2 true JPH0746095B2 (en) | 1995-05-17 |
Family
ID=14864648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61123601A Expired - Lifetime JPH0746095B2 (en) | 1986-05-30 | 1986-05-30 | Ultrasonic flaw detector probe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0746095B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011047905A (en) * | 2009-08-28 | 2011-03-10 | Mitsubishi Heavy Ind Ltd | Installation method of ultrasonic vibrator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4850113B2 (en) * | 2007-04-03 | 2012-01-11 | 株式会社Ｉｈｉ検査計測 | Ultrasonic probe for high temperature and manufacturing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5932297A (en) * | 1982-08-17 | 1984-02-21 | Nippon Denso Co Ltd | Laminated piezoelectric element |
-
1986
- 1986-05-30 JP JP61123601A patent/JPH0746095B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011047905A (en) * | 2009-08-28 | 2011-03-10 | Mitsubishi Heavy Ind Ltd | Installation method of ultrasonic vibrator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62280649A (en) | 1987-12-05 |
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