SU590654A1 - Method of non-destructive testing of ferromagnetic materials - Google Patents
Method of non-destructive testing of ferromagnetic materialsInfo
- Publication number
- SU590654A1 SU590654A1 SU762412146A SU2412146A SU590654A1 SU 590654 A1 SU590654 A1 SU 590654A1 SU 762412146 A SU762412146 A SU 762412146A SU 2412146 A SU2412146 A SU 2412146A SU 590654 A1 SU590654 A1 SU 590654A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- ferromagnetic materials
- destructive testing
- harmonic
- hardness
- judged
- Prior art date
Links
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Description
1one
Изобретение относитс к неразрушающему контролю ферромагнитных материалов и может быть использовано дл контрол твердости холоднокатанной ленты из малоуглеродистых сталей.The invention relates to non-destructive testing of ferromagnetic materials and can be used to control the hardness of cold-rolled strip of low carbon steels.
Известен способ контрол твердости, заключающийс в том, что деталь намагничивают до насыщени переменным магнитным полем с одновременным подмагничиванием посто нным полем, выдел ют л-ую четную гармонику измеренного сигнала, измер ют сдвиг фаз между п-ой гармоникой и опорным сигналом, преобразованным в синусоидальный с частотой лш н но сдвигу фаз суд т о коэрцитивной силе.A known method of controlling hardness is that the part is magnetized to saturation with an alternating magnetic field with simultaneous biasing by a constant field, the l-th even harmonic of the measured signal is extracted, the phase shift between the 5th harmonic and the reference signal is converted into a sinusoidal with a frequency of less than one phase shift, the coercive force is judged.
Однако этот способ при контроле твердости холоднокатанной ленты обладает низкой точностью из-за вли ни нрокатки, так как магнитные характеристики ленты, по которым суд т о твердости, в том числе и коэрцитивна сила, различны вдоль н поперек прокатки .However, this method, when testing the hardness of cold-rolled tape, has low accuracy due to the influence of rolling, since the magnetic characteristics of the tape, by which hardness is judged, including the coercive force, are different along and across the rolling.
Наиболее близким по техиической сущности вл етс способ неразрущающ.его контрол , заключающийс в намагничивании ферромагнитной ленты переменным магнитным полем с одновременным подмагничиванием посто нным полем и выделении четных и нечетных высщих гармоник.The closest in technical essence is the method of non-destructive control, which consists in magnetizing a ferromagnetic tape with an alternating magnetic field with simultaneous magnetization by a constant field and the separation of even and odd high harmonics.
Однако такой способ имеет недостаточную точность контрол на тех зчастках, где нет зависимости между сигналом второй гармоннки и твердостью.However, this method has insufficient control accuracy on those parts where there is no relationship between the second harmonic signal and hardness.
Целью изобретени вл етс повыщенне точности контрол .The aim of the invention is to increase the accuracy of control.
Дл этого но нредлагаемому способу выдел ют вторые гармоники тангенциальных составл ющнх во взаимно перпеидикул рных направлени х, суммируют их, выдел ют третью гармонику нормальной составл ющей, суммируют ее с результирзаощей тангенциальной составл ющей и но полученным данным суд т о контролируемом параметре.For this, but the proposed method, the second harmonics of the tangential components in mutually perpendicular directions are selected, they are summed up, the third harmonic of the normal component is extracted, the resultant with the tangential component results is obtained, but the data obtained are judged to be a controlled parameter.
На фиг. 1 приведена схема устройства дл реализации нредлагаемого способа; на фиг. 2 - вид по стрелке А на фиг. 1. . Устройство содержит катушку 1 возбуждени , измерительную катушку 2 нормальной составл ющей, комненсационную катущку 3 нормальной составл ющей, измерительные катущки 4 н 5 тангенциальных составл ющих, KO.vinencaunoHHbie катушки 6 н 7 тангенциальных составл ющих, корпус 8, компенсатор 9, магнит 10, генератор 11, избирательный усилитель 12 третьей гармоники, избирательные усилители 13 и 14 вторых гармоник, сумматор 15 вторых гармоник, сумматор 16 вторых и третьей гармоник и регистрирующий прибопFIG. 1 shows a diagram of the device for implementing the proposed method; in fig. 2 is a view along arrow A in FIG. one. . The device contains the excitation coil 1, the measuring coil 2 of the normal component, the compensation component 3 of the normal component, the measuring coils 4 and 5 of the tangential components, KO.vinencaunoHHie coils 6 and 7 of the tangential components, housing 8, compensator 9, magnet 10, generator 11, a third harmonic selective amplifier 12, second harmonics selective amplifiers 13 and 14, a second harmonic adder 15, a second and third harmonic adder 16 and a recording instrument
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762412146A SU590654A1 (en) | 1976-10-14 | 1976-10-14 | Method of non-destructive testing of ferromagnetic materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762412146A SU590654A1 (en) | 1976-10-14 | 1976-10-14 | Method of non-destructive testing of ferromagnetic materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU590654A1 true SU590654A1 (en) | 1978-01-30 |
Family
ID=20679892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU762412146A SU590654A1 (en) | 1976-10-14 | 1976-10-14 | Method of non-destructive testing of ferromagnetic materials |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU590654A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5280240A (en) * | 1989-10-02 | 1994-01-18 | North American Philips Corporation | Methodology using odd harmonic components of an induced magnetic field for analyzing superconducting magnetic materials and their properties |
| US5283524A (en) * | 1989-10-02 | 1994-02-01 | U.S. Philips Corporation | AC magnetic susceptometer with odd harmonic measurement for analyzing superconductive magnetic materials |
-
1976
- 1976-10-14 SU SU762412146A patent/SU590654A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5280240A (en) * | 1989-10-02 | 1994-01-18 | North American Philips Corporation | Methodology using odd harmonic components of an induced magnetic field for analyzing superconducting magnetic materials and their properties |
| US5283524A (en) * | 1989-10-02 | 1994-02-01 | U.S. Philips Corporation | AC magnetic susceptometer with odd harmonic measurement for analyzing superconductive magnetic materials |
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