SU602845A1 - Method of magnetographic inspection of articles made of ferromagnetic materials - Google Patents

Method of magnetographic inspection of articles made of ferromagnetic materials

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Publication number
SU602845A1
SU602845A1 SU752161550D SU2161550D SU602845A1 SU 602845 A1 SU602845 A1 SU 602845A1 SU 752161550 D SU752161550 D SU 752161550D SU 2161550 D SU2161550 D SU 2161550D SU 602845 A1 SU602845 A1 SU 602845A1
Authority
SU
USSR - Soviet Union
Prior art keywords
magnetic
magnetization
carrier
product
magnetogram
Prior art date
Application number
SU752161550D
Other languages
Russian (ru)
Inventor
Александр Фролович Зайцев
Владимир Петрович Петренко
Original Assignee
Проектно-Конструкторский Технологический Институт
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Проектно-Конструкторский Технологический Институт filed Critical Проектно-Конструкторский Технологический Институт
Application granted granted Critical
Publication of SU602845A1 publication Critical patent/SU602845A1/en

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  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Claims (3)

Целью изобретени   вл етс  повышение достоверности контрол . Дл  этого на магнитном носителе путем удалени  ферромагнитного сло  получают немагнитные участки, в процессе считывани  магнитограммы сравнивают сигнал от границы иамагниченного и немагнитно,го участков магнитного носител  с эталонным сигналом , определ ют по результату сравнени  степень намагниченности магнитного носител , и с vHeTOM степени намагниченности корректируют режим намагничивани  издели  Способ осуществл етс  следук цим образом . В ферромагнитном носителе путем удалени  ферромагнитного сло  получают немагнит ные участки, расположенные перпендикул рн направлению считывани , например пробивают отверсти  дйайетром .1,5 мм на равном рассто нии одно от другого вдоль продольной оси магнитного носител . Снимают магнитограмму магнитного рельефа при переходе измерительным преобразователем границы раздела намагниченного и немагнитного участков. Получают эталонную магнитограмму на основании экспериментальных исследований дл  различных марок сталей, толщины контролируемого издели  и типов намагничивающих устройств. Сравнива  магнитограммы магнитного рельефа при переходе измерительным преобразователем границы раздела намагниченного и немагнитного участков эталонного и использ уемого при контроле носителей, суд т о степени намагниченности последнегх) и корректируют в соответствии с полученными сведени ми режим намагничивани  издели . Формулаизобретени  Способ магнитографического контрол  изделий из ферромагнитных материалов, заключающийс  в том, что изделие намагничивают совместно с разметенным на его поверхности носителем, считывают с носител  магнитограмму и по ней суд т о наличии и параметрах дефектов, отличающийс  тем, что, с целью повышени  достоверности контрол , на магнитном носителе путем удалени  ферромагнитного сло  получают .немагнитные участки, в процессе считывани  магнитограммы сравнивают сигнал от границы намагниченного и немагнитного участков магнитного носител  с эталонным сигналом, определ ют по результату сравнени  степень намагниченности магнитного носител  и с учетом степени намагниченности корректируют режим намагничивани  издели ,. Источники информации, прин тые во внимание при экспертизе: 1.Авторское свидетельство СССР М;. 174415, кл. ( О1 К 27/82, 1964. The aim of the invention is to increase the reliability of the control. To do this, on a magnetic carrier, by removing the ferromagnetic layer, non-magnetic sections are obtained, in the process of reading the magnetogram, the signal from the interface of the magnetic and non-magnetic sections of the magnetic carrier is compared with the reference signal, the magnetization degree of the magnetic carrier is determined by the comparison result, and magnetization of the product. The method is carried out in the following manner. In a ferromagnetic carrier, by removing the ferromagnetic layer, non-magnetic portions located perpendicular to the reading direction are obtained, for example, holes are punched with a .1.5 mm diameter and an equal distance from one another along the longitudinal axis of the magnetic carrier. The magnetogram of the magnetic relief is removed when the measuring transducer passes the interface between the magnetized and nonmagnetic portions. A reference magnetogram is obtained on the basis of experimental studies for various steels, thickness of the monitored product and types of magnetizing devices. Comparing the magnetograms of the magnetic relief when the measuring transducer passes the interface between the magnetized and nonmagnetic areas of the reference and used in the control of carriers, the degree of magnetization of the latter is judged and the magnetization mode of the product is adjusted according to the obtained information. The method of magnetographic control of products made of ferromagnetic materials, namely, that the product is magnetized together with the carrier scattered on its surface, a magnetic tape is read from the carrier and is judged on the presence and parameters of defects, in order to increase the reliability of the control on a magnetic carrier, by removing the ferromagnetic layer, nonmagnetic regions are obtained; in the process of reading, the magnetogram compares the signal from the boundary of the magnetized and nonmagnetic portion in a magnetic carrier with a reference signal, the degree of magnetization of the magnetic carrier is determined from the comparison result and, taking into account the degree of magnetization, the magnetization of the product is corrected. Sources of information taken into account during the examination: 1. USSR author's certificate M ;. 174415, class (O1 C 27/82, 1964. 2.Сборник Дефектоскопи  сварных соединeнийpv ., МДНТП, 1969, с, 125-134. 2. Collection of Flaw Detection of Welded Connections pv., MDNTP, 1969, p. 125-134. 3. Козлов В. С. Физика магнитографиеской дефектоскопии, М., Машинострое-, ие, 1968, с. 40-51.3. Kozlov V.S. Physics of magnetic-magnetic flaw detection, M., Mashinostroe- ie, 1968, p. 40-51.
SU752161550D 1975-08-11 1975-08-11 Method of magnetographic inspection of articles made of ferromagnetic materials SU602845A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU752161550A SU954868A1 (en) 1975-08-11 1975-08-11 Method of magnetographic checking of ferromagnetic material articles

Publications (1)

Publication Number Publication Date
SU602845A1 true SU602845A1 (en) 1978-04-15

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Application Number Title Priority Date Filing Date
SU752161550D SU602845A1 (en) 1975-08-11 1975-08-11 Method of magnetographic inspection of articles made of ferromagnetic materials
SU752161550A SU954868A1 (en) 1975-08-11 1975-08-11 Method of magnetographic checking of ferromagnetic material articles

Family Applications After (1)

Application Number Title Priority Date Filing Date
SU752161550A SU954868A1 (en) 1975-08-11 1975-08-11 Method of magnetographic checking of ferromagnetic material articles

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2591748A1 (en) * 1985-10-29 1987-06-19 Bruss Polt I Magnetographic method for quality control of materials and defect measurement apparatus for carrying out this method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2591748A1 (en) * 1985-10-29 1987-06-19 Bruss Polt I Magnetographic method for quality control of materials and defect measurement apparatus for carrying out this method

Also Published As

Publication number Publication date
SU954868A1 (en) 1982-08-30

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