JPS552920A - Method of detecting surface dfect of non-magnetic material - Google Patents
Method of detecting surface dfect of non-magnetic materialInfo
- Publication number
- JPS552920A JPS552920A JP7548778A JP7548778A JPS552920A JP S552920 A JPS552920 A JP S552920A JP 7548778 A JP7548778 A JP 7548778A JP 7548778 A JP7548778 A JP 7548778A JP S552920 A JPS552920 A JP S552920A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- openings
- electromagnetic induction
- magnetic field
- test
- 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
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
PURPOSE: To detect surface defects, by impregnating the surface openings of non- magnetic materials (austinite stainless steel, copper alloy, etc.) with a liquid containing fine magnetic powder and by detecting the amount of magnetism of the magnetic material remaining in the openings by the electromagnetic induction or magnetic field detection method.
CONSTITUTION: Magnetic colloid solution is made of fine magnetic powder of 1 to 100mμ suspended in water or oily solvent. A penetration test method is applied for impregnation. Excess liquid may be wiped off with dry clth or by the application of an emulsifier and water spray. Thus the defective surface openings are impregnated with magnetic colloid solution. Next, defective openings are detected by the electromagnetic induction or magnetic field detection method. Here, the electromagnetic induction method will be explained. DC current of oscillator 5 is fed to test coil 3 via detector circuit 6 and cable 4, and eddy currents are produced by the magnetic field of the test coil on specimen 1. Their variation is converted into an electrical signal by detector circuit 6. Signal processing circuit 7 operates noise processing and others, and the results of the test are displayed by display 8.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7548778A JPS552920A (en) | 1978-06-23 | 1978-06-23 | Method of detecting surface dfect of non-magnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7548778A JPS552920A (en) | 1978-06-23 | 1978-06-23 | Method of detecting surface dfect of non-magnetic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS552920A true JPS552920A (en) | 1980-01-10 |
| JPS5746022B2 JPS5746022B2 (en) | 1982-09-30 |
Family
ID=13577686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7548778A Granted JPS552920A (en) | 1978-06-23 | 1978-06-23 | Method of detecting surface dfect of non-magnetic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS552920A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6013500U (en) * | 1983-07-06 | 1985-01-29 | 太産工業株式会社 | Case of electromagnetic pump drive control circuit device |
| US4713388A (en) * | 1984-10-05 | 1987-12-15 | Richter Gedeon Vegyeszeti Gyar Rt. | Certain 3- or 4-benzoyl-2-[(2-aminoethyl)thio-pyridines] and their anti-ulcer properties |
| US4859943A (en) * | 1987-12-28 | 1989-08-22 | The Babcock & Wilcox Company | Inspection method using magnetic particles in a liquid carrier in combination with electrical detection means |
| US4944185A (en) * | 1989-01-17 | 1990-07-31 | Westinghouse Electric Corp. | System and method for qualitatively and nondestructively inspecting adhesive joints and other materials |
| US4997834A (en) * | 1988-11-24 | 1991-03-05 | Yoshitomi Pharmaceutical Industries, Ltd. | Trans-4-amino(alkyl)-1-pyridylcarbamoylcyclohexane compounds and pharmaceutical use thereof |
| FR3097043A1 (en) * | 2019-06-07 | 2020-12-11 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Method for detecting a defect in a non-ferromagnetic material |
-
1978
- 1978-06-23 JP JP7548778A patent/JPS552920A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6013500U (en) * | 1983-07-06 | 1985-01-29 | 太産工業株式会社 | Case of electromagnetic pump drive control circuit device |
| JPH0431598Y2 (en) * | 1983-07-06 | 1992-07-29 | ||
| US4713388A (en) * | 1984-10-05 | 1987-12-15 | Richter Gedeon Vegyeszeti Gyar Rt. | Certain 3- or 4-benzoyl-2-[(2-aminoethyl)thio-pyridines] and their anti-ulcer properties |
| US4859943A (en) * | 1987-12-28 | 1989-08-22 | The Babcock & Wilcox Company | Inspection method using magnetic particles in a liquid carrier in combination with electrical detection means |
| US4997834A (en) * | 1988-11-24 | 1991-03-05 | Yoshitomi Pharmaceutical Industries, Ltd. | Trans-4-amino(alkyl)-1-pyridylcarbamoylcyclohexane compounds and pharmaceutical use thereof |
| US4944185A (en) * | 1989-01-17 | 1990-07-31 | Westinghouse Electric Corp. | System and method for qualitatively and nondestructively inspecting adhesive joints and other materials |
| FR3097043A1 (en) * | 2019-06-07 | 2020-12-11 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Method for detecting a defect in a non-ferromagnetic material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5746022B2 (en) | 1982-09-30 |
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