RU2010121417A

RU2010121417A - METHOD FOR MAGNETIC DEFECTOSCOPY OF PRODUCTS IN STRESSED STATE

Info

Publication number: RU2010121417A
Application number: RU2010121417/28A
Authority: RU
Inventors: Александр Петрович Степанов (RU); Александр Петрович Степанов; Алексей Игоревич Милованов (RU); Алексей Игоревич Милованов; Максим Александрович Степанов (RU); Максим Александрович Степанов
Priority date: 2010-05-26
Filing date: 2010-05-26
Publication date: 2011-12-10
Also published as: RU2441227C1

Abstract

Способ магнитной дефектоскопии изделий в напряженном состоянии, обеспечивающий обнаружение в процессе эксплуатации зон возникновения и роста местных напряжений, опасных развитием усталостных процессов и разрушением, в изделиях из ферромагнитного материала, находящихся под действием нагрузки и намагниченных с образованием полюсов симметричного магнитного поля на оси симметрии профилей сечений по всей длине объектов наблюдения, отличающийся тем, что об изменениях значений местных напряжений в зонах сечений судят по изменению величины магнитной индукции в попарно симметричных точках сечений на границах изделий, с возможностью определения характера напряженного состояния в зонах сечения по разности значений магнитной индукции в этих точках, а также с возможностью выявления предпосылок к разрушению изделия из-за превышения допускаемых напряжений или нарастания усталостных процессов, сравнением рабочих значений магнитной индукции с данными по эталонным образцам. The method of magnetic defectoscopy of products in tension, which ensures the detection during operation of zones of occurrence and growth of local stresses that are dangerous for the development of fatigue processes and destruction, in products of ferromagnetic material that are under load and magnetized with the formation of poles of a symmetric magnetic field on the axis of symmetry of the section profiles along the entire length of the objects of observation, characterized in that changes in the values of local stresses in the zones of sections are judged by the change in the value magnetic induction at pairwise symmetric cross-section points at the product boundaries, with the possibility of determining the nature of the stress state in the cross-section zones by the difference in the magnetic induction values at these points, as well as with the possibility of identifying the prerequisites for the destruction of the product due to exceeding permissible stresses or increasing fatigue processes, comparing the working values of magnetic induction with the data on the reference samples.

Claims

The method of magnetic defectoscopy of products in tension, which ensures the detection during operation of zones of occurrence and growth of local stresses that are dangerous for the development of fatigue processes and destruction, in products of ferromagnetic material that are under load and magnetized with the formation of poles of a symmetric magnetic field on the axis of symmetry of the section profiles along the entire length of the objects of observation, characterized in that changes in the values of local stresses in the zones of sections are judged by the change in the value magnetic induction at pairwise symmetric cross-section points at the product boundaries, with the possibility of determining the nature of the stress state in the cross-section zones by the difference in the magnetic induction values at these points, as well as with the possibility of identifying the prerequisites for the destruction of the product due to exceeding permissible stresses or increasing fatigue processes, comparing the working values of magnetic induction with the data on the reference samples.