SU1056047A1

SU1056047A1 - Ferromagnetic article ultrasonic quality control method

Info

Publication number: SU1056047A1
Application number: SU823468827A
Authority: SU
Inventors: Александр Васильевич Медведев; Борис Наумович Домашевский
Original assignee: Научно-производственное объединение "Атомкотломаш"
Priority date: 1982-07-09
Filing date: 1982-07-09
Publication date: 1983-11-23

Abstract

1. СПОСОБ УЛЬТРАЗВУКОВОГО КОНТРОЛЯ КАЧЕСТВА ФЕРРОМАГНИТНЫХ ИЗДЕЛИ1{ , заключакхцнйс в том, что нанос т на поверхность издели контактг ную среду, возбуждают в изделии 1юверхностные акустичес1а1е колебани , измер ют параметры прошедших через среду и изделие акустических сигналов и по параметрам последних суд т о качестве, отличающийс тем, что, с целью пов11Ш1ени достоверности контрол , в качестве контшстной среды используют ферромагнитную жидкость, воздействуют на изделие магнитным полем, а в качестве измер емых параметров используют врем прохождени акустических сигналов через изделие и ферромагнитную жидкость. 2. Способ по п.1, о т л и ч а ющ и и с тем, что, с целью определени глубины залегани дефекта изме- g н ют частоту магнитного пол до стабилизации времени прохо иени акусти- С/) . ческих сигналов через ферромагнитную ; жидкость и по ЭТОЙ частоте суд т о глубине залегани дефекта.1. THE METHOD OF ULTRASONIC QUALITY CONTROL OF FERROMAGNETIC PRODUCTS1 {concluded in that the latter are applied to the surface of the product by contacting medium, the acoustic signals that pass through the medium and the product are excited in the product, and the parameters of the last acoustic oscillations are measured, and the parameters of the acoustic signals passing through the medium and the product are measured, and the parameters of the acoustic signals passing through the medium and the product are measured, and the parameters of the acoustic signals passing through the medium and the product are measured, and the parameters of the acoustic signals passing through the medium and the product are measured, and the parameters of the acoustic signals passing through the medium and the product are measured, and the parameters of the acoustic signals passed through the medium and the product are measured and measured according to the measurements. characterized in that, in order to increase the reliability of the control, ferromagnetic liquid is used as a medium, the product is acted upon by a magnetic field, and the measured parameters are The time of passing acoustic signals through the product and the ferromagnetic fluid is used. 2. The method according to claim 1, in connection with the fact that, in order to determine the depth of the defect, the frequency of the magnetic field is changed until the acoustic transmission time C /) is stabilized. cic signals through ferromagnetic; fluid and THIS frequency judged the depth of the defect.

Description

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Claims

1. METHOD OF ULTRASONIC QUALITY CONTROL OF FERROMAGNETIC PRODUCTS, which consists in applying contact medium to the surface of the product, exciting surface acoustic vibrations in the product, measuring the parameters of acoustic signals transmitted through the medium and judging by the parameters of the latter, which differ in quality that, in order to increase the reliability of control, a ferromagnetic fluid is used as a contact medium, a magnetic field is applied to the product, and used as measured parameters in The transmission of acoustic signals through the product and ferromagnetic fluid.

2. The method of pop.!, Characterized in that, in order to determine the depth of the defect, change the frequency of the magnetic field to stabilize the transit time of the acoustic signals through the ferromagnetic fluid and this frequency is used to judge the depth of the defect.

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