JPS6410656U - - Google Patents
Info
- Publication number
- JPS6410656U JPS6410656U JP10599487U JP10599487U JPS6410656U JP S6410656 U JPS6410656 U JP S6410656U JP 10599487 U JP10599487 U JP 10599487U JP 10599487 U JP10599487 U JP 10599487U JP S6410656 U JPS6410656 U JP S6410656U
- Authority
- JP
- Japan
- Prior art keywords
- eddy current
- coil
- diagnostic device
- metal plate
- excitation frequency
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims 2
- 230000006866 deterioration Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
- 230000000704 physical effect Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 claims 1
- 229910001220 stainless steel Inorganic materials 0.000 claims 1
- 239000010935 stainless steel Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Description
第１図は渦電流探傷法の回路図、第２図は本考
案の一実施例を示す断面図、第３図はＳＵＳ３２
１材の使用時間と渦電流診断装置の読取り値との
関係を示すグラフ、第４図はσ相面積率とクリー
プ速度の関係を実測データで示すグラフ、第５ａ
図は超音波反射エコー法の装置を示す回路図、第
５ｂ図は超音波反射エコー法で実測した反射エコ
ーの電圧を示すグラフ、第６ａ図はＳＵＳ３２１
鋼の新材料と１２万時間使用材料の金属組織を示
す拡大図、第６ｂ図は第６ａ図のσ相拡大図、第
７図は渦電流発生状況を説明する斜視図、第８図
は渦電流の浸透深さを説明する側面図、第９図は
渦電流の電流密度Ｊの減衰特性を示すグラフであ
る。
２……検出器、５……材料、６……高透磁性鉄
心、９……コイル。
Fig. 1 is a circuit diagram of the eddy current flaw detection method, Fig. 2 is a sectional view showing an embodiment of the present invention, and Fig. 3 is a SUS32
Figure 4 is a graph showing the relationship between the usage time of one material and the reading value of the eddy current diagnostic device. Figure 4 is a graph showing the relationship between the σ phase area ratio and creep rate using measured data. Figure 5a
The figure is a circuit diagram showing the ultrasonic reflection echo method equipment, Figure 5b is a graph showing the voltage of the reflected echo actually measured by the ultrasonic reflection echo method, and Figure 6a is SUS321.
An enlarged view showing the metal structure of a new steel material and a material used for 120,000 hours, Figure 6b is an enlarged view of the σ phase of Figure 6a, Figure 7 is a perspective view explaining the eddy current generation situation, and Figure 8 is an eddy current diagram. FIG. 9 is a side view illustrating the current penetration depth and is a graph showing the attenuation characteristic of the current density J of eddy current. 2...Detector, 5...Material, 6...Highly permeable iron core, 9...Coil.
Claims (1)
する磁束が前記コイルに相対する金属板に渦電流
を発生し、該渦電流が前記金属板の物性により変
化し検出したその変化量で材質劣化を評価する渦
電流診断装置において、検出器に備えた前記コイ
ルの中心部に検出感度を向上させる高透磁性鉄心
を挿着しかつ前記励磁周波数を８０±２０ＫＨｚ
に設定することを特徴とするステンレス鋼の渦電
流診断装置。 The magnetic flux formed by passing an alternating current at the excitation frequency through the coil generates an eddy current in the metal plate facing the coil, and the eddy current changes depending on the physical properties of the metal plate, and the detected amount of change causes material deterioration. In the eddy current diagnostic device to be evaluated, a highly permeable iron core for improving detection sensitivity is inserted into the center of the coil provided in the detector, and the excitation frequency is set to 80 ± 20 KHz.
A stainless steel eddy current diagnostic device characterized by the following:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10599487U JPS6410656U (en) | 1987-07-10 | 1987-07-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10599487U JPS6410656U (en) | 1987-07-10 | 1987-07-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6410656U true JPS6410656U (en) | 1989-01-20 |
Family
ID=31339108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10599487U Pending JPS6410656U (en) | 1987-07-10 | 1987-07-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6410656U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021152527A (en) * | 2020-03-24 | 2021-09-30 | 国立大学法人九州工業大学 | Metallographic structure change detection method and metallographic structure change detection device |
-
1987
- 1987-07-10 JP JP10599487U patent/JPS6410656U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021152527A (en) * | 2020-03-24 | 2021-09-30 | 国立大学法人九州工業大学 | Metallographic structure change detection method and metallographic structure change detection device |
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