Method and apparatus for establishing magnetization levels for m

Details Method and apparatus for establishing magnetization levels for m Method and apparatus for establishing magnetization levels for m

1978-12-28

1981-09-15

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

By paramagnetic particles

324202, 324228, G01N 2784, G01R 3312, G01N 2772, G01R 3500

Patent

active

042900166

ABSTRACT:
A method and apparatus are provided which are based upon a discovery that regardless of the type of ferromagnetic material of a part and its shape, there is a certain direct, uniform and constant relationship between the level of magnetization required for satisfactory testing by the magnetic particle method and the response which is obtained from an eddy current instrument which has been properly calibrated and which is used under proper conditions. After removal of scale from a surface portion of a part and after demagnetization of the part, a probe of the eddy current instrument is simply placed against such surface portion and the part is magnetized at a level which produces a certain target eddy current indication. The instrument may be readily calibrated through the use of a test block which has a milled slot of a certain size. Preferably, the probe is of a crossed coil type permitting a rapid scanning operation with respect to a plurality of surface areas of a part of irregular shape.

REFERENCES:
patent: 3495166 (1970-02-01), Lorenzi et al.
Schroeder "Magnetic Flux Density Measurements Relative to Magnetic Particle Testing", pub. by ASTM Phila. Pa. May 1976 pp. 211-219.
Kraska et al., "Eddy Current Measurement of Magnetic Flux Density", General American Research Division Tech. Report AMFL-TR 72-115, May 1972.
Horstkotte et al., "Magnetic Particle Testing" 10/1945 General Electric Review pp. 24-30.

Affiliated with

Also associated with

Rating

Method and apparatus for establishing magnetization levels for m does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for establishing magnetization levels for m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for establishing magnetization levels for m will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-392800