JP2003057214A - Ultrasonic flaw detection method and apparatus in fillet welding section - Google Patents
Ultrasonic flaw detection method and apparatus in fillet welding sectionInfo
- Publication number
- JP2003057214A JP2003057214A JP2001243696A JP2001243696A JP2003057214A JP 2003057214 A JP2003057214 A JP 2003057214A JP 2001243696 A JP2001243696 A JP 2001243696A JP 2001243696 A JP2001243696 A JP 2001243696A JP 2003057214 A JP2003057214 A JP 2003057214A
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- flaw detection
- probe
- fillet
- defect
- 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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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0428—Mode conversion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、広くは非破壊検査
技術に関し、特に隅肉溶接部近傍に発生する疲労き裂等
の欠陥検出を行う超音波探傷方法及びその装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to a nondestructive inspection technique, and more particularly to an ultrasonic flaw detection method and apparatus for detecting defects such as fatigue cracks generated near fillet welds.
【０００２】[0002]
【従来の技術】隅肉溶接部の超音波検査は、垂直探触子
もしくは斜角探触子、または斜角探触子と垂直探触子と
を併用するなどの方法により行われている。また、隅肉
溶接部の探傷を行う方法として、特開２０００−９７９
１９号公報に記載されているようなクリーピング波探触
子を用いる「超音波探傷法」の発明も提案されている。2. Description of the Related Art Ultrasonic inspection of a fillet weld is carried out by a method such as a vertical probe or a bevel probe, or a combination of a bevel probe and a vertical probe. Further, as a method for detecting flaws in a fillet welded portion, Japanese Patent Laid-Open No. 2000-979 has been proposed.
An invention of an "ultrasonic flaw detection method" using a creeping wave probe as described in Japanese Patent No. 19 is also proposed.
【０００３】[0003]
【発明が解決しようとする課題】実際の構造物等の隅肉
溶接部では、後述する図３にも示すように、疲労き裂等
の欠陥は溶接ビード始端部を起点に発生することが多
く、また、部材の構成等により探傷面が限定されてしま
う場合も多い。図３に示すような場合、従来用いられて
いるようなパルスエコー法では、き裂等により反射した
超音波が探触子に戻らない場合も多く、そのうえ、溶接
ビードや非溶融部での超音波の反射やモード変換等によ
り、欠陥の判別が困難となる場合が生じる。In fillet welds of actual structures and the like, as shown in FIG. 3 described later, defects such as fatigue cracks often occur starting from the weld bead start end. In addition, the flaw detection surface is often limited due to the configuration of the members. In the case shown in Fig. 3, in the pulse echo method that is conventionally used, the ultrasonic waves reflected by cracks and the like often do not return to the probe, and moreover, the ultrasonic waves at the weld bead and the non-melted portion are not returned. Defects may be difficult to identify due to reflection of sound waves, mode conversion, and the like.
【０００４】このほかに、上記のように隅肉溶接部の超
音波探傷を行う方法として、特開２０００−９７９１９
号のようなクリーピング波を用いる方法もある。しかし
ながら、クリーピング波はその性質上減衰が大きく、図
３の場合のように、欠陥の発生位置と探触子の間の距離
が大きい場合には適用が困難となる。In addition to this, as a method for performing ultrasonic flaw detection of the fillet welded portion as described above, Japanese Patent Laid-Open No. 2000-97919.
There is also a method of using a creeping wave like No. However, the creeping wave has a large attenuation due to its nature, and is difficult to apply when the distance between the defect occurrence position and the probe is large, as in the case of FIG.
【０００５】本発明は、上記のような課題を解決するた
めに行われたものであり、隅肉溶接部に発生する疲労き
裂等の欠陥を超音波を用いて、簡便、かつ、高精度に検
出する方法およびその装置を提供するものである。The present invention has been made in order to solve the above problems, and it is simple and highly accurate to use ultrasonic waves to detect defects such as fatigue cracks occurring in fillet welds. And a device therefor.
【０００６】[0006]
【課題を解決するための手段】本発明の請求項１に係る
隅肉溶接部の超音波探傷方法は、隅肉溶接部に発生する
き裂等の欠陥検出を、送信探触子より発した超音波を片
側の溶接ビードを介して入射し、き裂等の欠陥で反射し
た超音波をその反対側の溶接ビードを介して受信探触子
により受信して探傷を行うものである。また、本発明の
請求項２に係る隅肉溶接部の超音波探傷方法は、前記請
求項１に係る探傷方法において、集束超音波ビームを用
いて探傷を行うものである。また、本発明の請求項３に
係る隅肉溶接部の超音波探傷方法は、前記請求項１また
は請求項２に係る探傷方法において、送信用超音波探触
子と受信用超音波探触子の超音波ビームの中心軸が検出
対象とするき裂等の位置で交差するように送信用探触子
と受信用探触子の間隔を設定して探傷を行うものであ
る。また、本発明の請求項４に係る超音波探傷方法は、
前記請求項１または２に係る探傷方法において、超音波
ビームの集束位置が検出対象とするき裂等の位置に一致
するように送信用探触子と受信用探触子の間隔を設定し
探傷を行うものである。さらに、本発明の請求項５に係
る超音波探傷装置は、前記請求項１から請求項４に係る
超音波探傷方法の探傷に用いる装置において、超音波探
触子を走査する走査手段、超音波探触子の位置を検出す
る位置検出手段、探傷データを記録する記録手段、探傷
データを処理する処理手段のうちの、少なくとも走査手
段を有する隅肉溶接部の超音波探傷装置を提供するもの
である。In the ultrasonic flaw detection method for a fillet weld portion according to claim 1 of the present invention, a defect such as a crack occurring in the fillet weld portion is detected by a transmitting probe. Ultrasonic waves are incident through a welding bead on one side, and ultrasonic waves reflected by a defect such as a crack are received by a receiving probe via a welding bead on the opposite side to perform flaw detection. An ultrasonic flaw detection method for a fillet welded portion according to a second aspect of the present invention is the same as the flaw detection method according to the first aspect, in which a focused ultrasonic beam is used for flaw detection. The ultrasonic flaw detection method for fillet welds according to claim 3 of the present invention is the ultrasonic flaw detection method according to claim 1 or 2, wherein the ultrasonic probe for transmission and the ultrasonic probe for reception are provided. The flaw detection is performed by setting the interval between the transmitting probe and the receiving probe so that the central axis of the ultrasonic beam intersects at the position of the crack or the like to be detected. The ultrasonic flaw detection method according to claim 4 of the present invention is
In the flaw detection method according to claim 1 or 2, the flaw detection is performed by setting a gap between the transmission probe and the reception probe so that the focus position of the ultrasonic beam coincides with the position of a crack or the like to be detected. Is to do. Furthermore, an ultrasonic flaw detection apparatus according to claim 5 of the present invention is the apparatus used for flaw detection in the ultrasonic flaw detection method according to any one of claims 1 to 4, wherein the scanning means scans the ultrasonic probe, To provide an ultrasonic flaw detector for a fillet weld having at least a scanning unit among a position detection unit that detects the position of a probe, a recording unit that records flaw detection data, and a processing unit that processes flaw detection data. is there.
【０００７】[0007]
【発明の実施の形態】実施の形態１
図１は本発明の実施形態１に係る超音波探傷方法の説明
図、図２は本発明で主な欠陥検出対象とする隅肉溶接部
材の部分断面図である。図１と図２において、２と３は
溶接部材、４は隅肉溶接部、４０は非溶融部、４１，４
２は溶接ビードである。部材２と部材３はＴ字状に連結
されて、両部材２，３の連結面における非溶接部４０の
両側に溶接ビード４１，４２を形成したＴ継手型の隅肉
溶接部４が構成されている。２０は水平方向に配置され
た部材２の上面の探傷面で、探傷時の送，受信用の探触
子が圧接される。５は垂直方向の部材３の内部に生じた
疲労亀裂などの欠陥で、前述のように発生頻度の高い溶
接ビード４２の始端部を起点に形成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG. 1 is an explanatory view of an ultrasonic flaw detection method according to a first embodiment of the present invention, and FIG. 2 is a partial cross section of a fillet welding member which is a main defect detection target in the present invention. It is a figure. 1 and 2, 2 and 3 are welded members, 4 is a fillet welded portion, 40 is a non-melted portion, 41, 4
2 is a weld bead. The members 2 and 3 are connected in a T-shape to form a T-joint type fillet welded portion 4 in which weld beads 41 and 42 are formed on both sides of the non-welded portion 40 on the connecting surfaces of the members 2 and 3. ing. Reference numeral 20 denotes a flaw detection surface on the upper surface of the member 2 arranged in the horizontal direction, to which a probe for sending and receiving at the time of flaw detection is pressed. Defects 5 such as fatigue cracks formed inside the member 3 in the vertical direction are formed from the starting end of the weld bead 42, which frequently occurs as described above, as a starting point.
【０００８】６，７は送，受信探触子、Ｌは両探触子６
と７の間隔、８は伝搬損失を防ぐ接触媒質である。ま
た、６０は送信超音波ビーム、７０は受信超音波ビーム
（受信探触子指向特性）、Ｏ−Ｏは両ビーム６０，７０
の中心軸である。送信探触子６と受信探触子７には図１
に示すように集束型の探触子が用いられ、隅部溶接部４
の両側で接触媒質８を介して部材２の探傷面２０上に対
向して設置される。そして、送信と受信の超音波ビーム
６０と７０の中心軸Ｏ−Ｏが欠陥５の発生位置で交差し
て集束するように、送信探触子６と受信探触子７の間隔
Ｌが設定される。なお、集束型探触子は線集束タイプ、
点集束タイプのどちらでもよい。Reference numerals 6 and 7 denote transmitting and receiving probes, and L denotes both probes 6.
The distance between 7 and 7, and 8 is a contact medium for preventing propagation loss. Further, 60 is a transmission ultrasonic beam, 70 is a reception ultrasonic beam (reception probe directivity), and OO is both beams 60, 70.
Is the central axis of. The transmitting probe 6 and the receiving probe 7 are shown in FIG.
As shown in Fig. 4, a focusing probe is used, and the corner welding part 4
On both sides of the inspection surface 20 of the member 2 with the contact medium 8 interposed therebetween. Then, the distance L between the transmitting probe 6 and the receiving probe 7 is set so that the central axes OO of the transmitting and receiving ultrasonic beams 60 and 70 intersect and converge at the position where the defect 5 occurs. It The focusing probe is a line focusing type,
Either of the point focusing type may be used.
【０００９】上記のように送，受信探触子６，７を設置
した場合、送信探触子６より発せられた超音波ビーム６
０は、接触媒質８を介して部材２に入射し、部材２中を
伝播して片側の溶接ビード４１内を通過して検査部位に
到達する。検査部位に欠陥５が存在する場合には、入射
超音波６０が欠陥５で反射する。反射した超音波７０は
もう片側の溶接ビード４２を通過し、再び部材２内を伝
播して接触媒質８を介して受信探触子７により受信され
て検出信号が出力される。一方、検査部位に欠陥５が存
在しない場合には、入射超音波６０が反射しないために
受信探触子７へ向かう超音波は存在しない。この結果、
受信探触子７からは信号が出力されないことになる。When the transmitting and receiving probes 6 and 7 are installed as described above, the ultrasonic beam 6 emitted from the transmitting probe 6
0 enters the member 2 via the contact medium 8, propagates through the member 2, passes through the weld bead 41 on one side, and reaches the inspection site. When the defect 5 exists at the inspection site, the incident ultrasonic wave 60 is reflected by the defect 5. The reflected ultrasonic wave 70 passes through the welding bead 42 on the other side, propagates in the member 2 again, is received by the receiving probe 7 via the contact medium 8, and a detection signal is output. On the other hand, when the defect 5 does not exist at the inspection site, the incident ultrasonic wave 60 does not reflect, and therefore, the ultrasonic wave traveling toward the receiving probe 7 does not exist. As a result,
No signal is output from the reception probe 7.
【００１０】このように、欠陥５の有無が出力信号の有
無により判断できるため、欠陥５の判別が簡便となる。
また、送信探触子６と受信探触子７を共に集束型探触子
を用い、さらにその集束位置が欠陥５の位置に相当する
ため、超音波の広がりにより非溶融部４０や溶接ビード
４１，４２の表面等で反射するような欠陥検出上のノイ
ズ成分となる超音波の受信が抑制されることになる。こ
のため、一層高精度の探傷が可能となる。なお、実施の
形態１では、接触媒質８を介して超音波を送受信する方
法の場合で説明したが、電磁超音波等の接触媒質８を用
いない超音波探触子を用いてもその効果には変わりがな
い。As described above, since the presence / absence of the defect 5 can be determined by the presence / absence of the output signal, the determination of the defect 5 can be simplified.
Further, since both the transmitting probe 6 and the receiving probe 7 are focused type probes, and the focusing position thereof corresponds to the position of the defect 5, the unmelted portion 40 and the welding bead 41 are spread due to the spread of ultrasonic waves. , 42 which suppresses the reception of ultrasonic waves which become a noise component in the defect detection which is reflected by the surface of the substrate 42. Therefore, it is possible to detect flaws with higher accuracy. In the first embodiment, the method of transmitting and receiving ultrasonic waves via the contact medium 8 has been described. However, even if an ultrasonic probe that does not use the contact medium 8 such as electromagnetic ultrasonic waves is used, the effect can be obtained. Does not change.
【００１１】実施の形態２
図３は本発明の超音波探傷装置の構成を示す説明図、図
４は本発明の探傷結果の波形と画像を示す説明図であ
る。図３において、９は走査部、１０はパルサ・レシー
バー、１１はデータ記録部、１２はデータ処理部、１３
は制御部である。図示のように、送，受信探触子６，７
等の既に説明した図１の構成部材にこれら走査部９やパ
ルサ・レシーバー１０等を含めて、本発明の超音波探傷
装置１が構成されている。そして、実施の形態１で述べ
たように、位置設定するために送，受信探触子６，７が
走査部９に取り付けられる。Embodiment 2 FIG. 3 is an explanatory view showing the structure of the ultrasonic flaw detector of the present invention, and FIG. 4 is an explanatory diagram showing the waveform and image of the flaw detection result of the present invention. In FIG. 3, 9 is a scanning unit, 10 is a pulser / receiver, 11 is a data recording unit, 12 is a data processing unit, and 13 is a data processing unit.
Is a control unit. As shown, the transmitting and receiving probes 6, 7
The ultrasonic flaw detector 1 of the present invention is configured by including the scanning unit 9, the pulsar receiver 10, and the like in the already described constituent members of FIG. Then, as described in the first embodiment, the sending and receiving probes 6 and 7 are attached to the scanning unit 9 to set the position.
【００１２】制御部１３からの信号により走査部９が駆
動され、走査部９から両探触子６，７の位置に応じた信
号が制御部１３へ出力される。出力された位置信号によ
り両探触子６，７の位置が碓認され、予め設定された探
傷位置に送，受信探触子６，７が移動したことが判断さ
れ、パルサ・レシーバ１０にトリガ信号が出力される。
このトリガ信号を受けると、実施の形態１で示したプロ
セスで欠陥５の探傷が行われ、受信された信号はデータ
記録部１１で記録されると同時に、データ処理部１２で
処理されてディスプレイ等に表示される。また、データ
処理部１２はデータ記録部１１に記録されたデータを読
み取り、データを処理してディスプレイ等に表示させる
こともできる。The scanning unit 9 is driven by a signal from the control unit 13, and the scanning unit 9 outputs a signal corresponding to the positions of the probes 6 and 7 to the control unit 13. The positions of both probes 6 and 7 are confirmed by the output position signals, and it is determined that the probes 6 and 7 have moved to the flaw detection position set in advance and the reception probes 6 and 7 have moved, and the pulsar receiver 10 is triggered. The signal is output.
When the trigger signal is received, the defect 5 is detected by the process described in the first embodiment, and the received signal is recorded in the data recording unit 11 and simultaneously processed in the data processing unit 12 to be displayed on the display or the like. Is displayed in. The data processing unit 12 can also read the data recorded in the data recording unit 11, process the data, and display the data on a display or the like.
【００１３】[0013]
【実施例】Ｔ継手隅肉溶接部に適用した場合の本発明の
実施例を、以下に示す。この実施例では、探傷面２０か
ら深さ３８ｍｍの位置に発生した疲労き裂の欠陥５の探
傷を行った。用いた超音波探触子は横波斜角探触子、屈
折角５５゜、集束深さ３８ｍｍの線集束型のもの２個を
それぞれの探触子６，７の超音波ビームの中心軸Ｏ−Ｏ
が深さ３８ｍｍの位置で交差するように設定し、探触子
６，７を走査して探傷データを収録した。図４（ａ）に
収録した探傷データのＡスコープ波形、および、探傷デ
ータを画像化したものを図４（ｂ）に示す。図４（ａ）
のＡスコープ波形から、隅肉溶接部４の非溶融部４０か
らのエコーの後ろにき裂５からのエコーが現れており、
また、探傷結果を画像化したものにおいてもき裂５が画
像上に明確に現れており、本発明の有効性が確認できて
いる。EXAMPLE An example of the present invention when applied to a T-joint fillet weld is shown below. In this example, the flaw 5 of the fatigue crack generated at a depth of 38 mm from the flaw detection surface 20 was flaw-detected. The ultrasonic probe used was a transverse wave bevel probe, a line focusing type probe having a refraction angle of 55 ° and a focusing depth of 38 mm, and two ultrasonic probe central axes O- O
Was set to intersect at a depth of 38 mm, and the probes 6 and 7 were scanned to record flaw detection data. FIG. 4B shows an A-scope waveform of the flaw detection data recorded in FIG. 4A and an image of the flaw detection data. Figure 4 (a)
From the A-scope waveform of, the echo from the crack 5 appears after the echo from the non-melted portion 40 of the fillet welded portion 4,
Further, in the image of the flaw detection result, the crack 5 clearly appears on the image, confirming the effectiveness of the present invention.
【００１４】[0014]
【発明の効果】以上のように本発明によれば、隅肉溶接
部に発生する疲労き裂等の欠陥の検出が、信号の有無で
判断でき、かつ、欠陥以外での反射波の受信が抑制され
るため、簡便で高精度な欠陥の検出が可能となる。As described above, according to the present invention, a defect such as a fatigue crack occurring in a fillet weld can be detected by the presence or absence of a signal, and a reflected wave other than the defect can be received. Since it is suppressed, the defect can be detected easily and with high accuracy.
【図１】本発明の実施形態１に係る超音波探傷方法の説
明図である。FIG. 1 is an explanatory diagram of an ultrasonic flaw detection method according to a first embodiment of the present invention.
【図２】本発明で主な検出対象とする隅肉溶接部材の拡
大断面図である。FIG. 2 is an enlarged cross-sectional view of a fillet welding member which is a main detection target in the present invention.
【図３】本発明の超音波探傷装置の構成を示す説明図で
ある。FIG. 3 is an explanatory diagram showing a configuration of an ultrasonic flaw detector according to the present invention.
【図４】本発明の探傷結果の波形と画像を示す説明図で
ある。FIG. 4 is an explanatory diagram showing a waveform and an image of a flaw detection result of the present invention.
１ 超音波探傷装置 ２，３ 溶接部材 ４ 隅肉溶接部 ５ 欠陥（き裂） ６ 送信探触子 ７ 受信探触子 ８ 接触媒質 ９ 走査部 １０ パルサ・レシーバー １１ データ記録部 １２ データー処理部 １３ 制御部 ２０ 探傷面 ４０ 非溶融部 ４１，４２ 溶接ビード ６０ 送信超音波ビーム ７０ 受信超音波ビーム（受信探触子指向特性） Ｌ 間隔 Ｏ−Ｏ 中心軸 1 Ultrasonic flaw detector A few welding parts 4 fillet welds 5 defects (cracks) 6 Transmission probe 7 Receiving probe 8 Contact medium 9 Scanning section 10 pulsar receiver 11 Data recording section 12 Data processing unit 13 Control unit 20 flaw detection surface 40 Non-melting part 41,42 Weld beads 60 transmission ultrasonic beam 70 Received ultrasonic beam (directivity of receiving probe) L interval OO central axis
Claims (5)
隅肉溶接部に発生するき裂等の欠陥検出を行う超音波探
傷方法において、 送信探触子より発した送信超音波を一方の溶接ビードを
介して部材に入射し、き裂等の欠陥部で反射した反射超
音波を他方の溶接ビードを介して受信探触子により受信
することを特徴とする隅肉溶接部の超音波探傷方法。1. An ultrasonic flaw detection method for detecting a defect such as a crack generated in a fillet weld having weld beads formed on both sides of a non-melted portion. Ultrasonic flaw detection of fillet welds characterized by receiving reflected ultrasonic waves that are incident on a member through a welding bead and are reflected by a defect such as a crack through a receiving probe through the other welding bead. Method.
いる、または、受信探触子の受信指向特性が集束型のも
のを用いる、もしくはその両方を用いることを特徴とす
る請求項１記載の隅肉溶接部の超音波探傷方法。2. The method according to claim 1, wherein a focused ultrasonic beam is used for the transmitted ultrasonic wave, a receiving directional characteristic of the receiving probe is a focused type, or both of them are used. Ultrasonic flaw detection method for fillet welds.
ームの中心軸が検出対象とするき裂等の欠陥発生位置で
交差するように、前記送信用探触子と受信用探触子の間
隔を設定することを特徴とする請求項１または２に記載
の隅肉溶接部の超音波探傷方法。3. The transmitting probe and the receiving probe are arranged such that the central axes of the ultrasonic beams of the transmitting probe and the receiving probe intersect at a defect occurrence position such as a crack to be detected. The ultrasonic flaw detection method for a fillet welded portion according to claim 1 or 2, characterized in that an interval between the contact pieces is set.
とするき裂等の欠陥位置に一致するよう送信用探触子と
受信用探触子の間隔を設定することを特徴とする請求項
１または２に記載の隅肉溶接部の超音波探傷方法。4. The distance between the transmitting probe and the receiving probe is set so that the focus position of the ultrasonic beam coincides with a defect position such as a crack to be detected. The ultrasonic flaw detection method for fillet welds according to 1 or 2.
前記超音波探触子の位置を検出する位置検出手段、前記
亀裂等の探傷波形を記録する記録手段、超音波の送受信
を切り替える切替手段、前記探傷波形より探傷結果を画
像化する画像化手段とを備えた超音波探傷装置であっ
て、 少なくとも前記走査手段を有することを特徴とする請求
項１乃至４のいずれかに記載の隅肉溶接部の超音波探傷
装置。5. A scanning means for scanning the ultrasonic probe,
Position detecting means for detecting the position of the ultrasonic probe, recording means for recording flaw detection waveforms such as the cracks, switching means for switching transmission and reception of ultrasonic waves, imaging means for imaging flaw detection results from the flaw detection waveforms, An ultrasonic flaw detector for a fillet weld portion according to any one of claims 1 to 4, wherein the ultrasonic flaw detector has at least the scanning means.
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|---|---|---|---|
| JP2001243696A JP2003057214A (en) | 2001-08-10 | 2001-08-10 | Ultrasonic flaw detection method and apparatus in fillet welding section |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001243696A JP2003057214A (en) | 2001-08-10 | 2001-08-10 | Ultrasonic flaw detection method and apparatus in fillet welding section |
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| Country | Link |
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| JP (1) | JP2003057214A (en) |
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| JP2007147548A (en) * | 2005-11-30 | 2007-06-14 | National Maritime Research Institute | Method and apparatus for measuring throat depth value in fillet weld |
| JP2008139123A (en) * | 2006-11-30 | 2008-06-19 | Mitsubishi Heavy Ind Ltd | Ultrasonic flaw detector and method |
| JP2008528963A (en) * | 2005-01-21 | 2008-07-31 | フルオー・テクノロジーズ・コーポレイシヨン | Ultrasonic phased array apparatus and method for stainless steel |
| CN102520067A (en) * | 2011-12-16 | 2012-06-27 | 北京工业大学 | Tube seat fillet welding seam detection method based on CIVA simulation software |
| CN106840053A (en) * | 2017-03-14 | 2017-06-13 | 中车青岛四方机车车辆股份有限公司 | A kind of leg size of fillet weld and internal flaw ultrasonic non-destructive measuring method |
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