Process allowing background noise to be reduced during eddy-curr

Details Process allowing background noise to be reduced during eddy-curr Process allowing background noise to be reduced during eddy-curr

1994-07-26

1997-06-03

Bray, W. Donald

Metal deforming

By use of roller or roller-like tool-element

Comprising tool movable relative to stationary work-portion...

72227, 72 168, 72 3106, 138 39, 324225, 324238, 32420723, B21D 702

Patent

active

056343655

ABSTRACT:
The process relates to the aptitude for detectability of defects using eddy-currents on metal tubes cold laminated using a pilger mill and relates more particularly to the possibility of reducing the background noise and increasing the ratio between a standard signal and this background noise.
The process consists of carrying out, after reduction in section by at least 30% in a cold pilger mill, a hollow drawing pass with a reduction in the external diameter of approximately 0.1% to 5%. The signal/background noise ratio can in this way be multiplied by a factor of between 2 and 3.7, in the case of a series of tubes made of INCO 690 alloy, as shown in the single figure.
The invention also relates to tubes produced using this process.
Application in production of steam generating tubes for nuclear power stations.

REFERENCES:
patent: 4030333 (1977-06-01), Bellmann et al.
patent: 5101366 (1992-03-01), Cueman et al.

Affiliated with

Also associated with

Rating

Process allowing background noise to be reduced during eddy-curr does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process allowing background noise to be reduced during eddy-curr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process allowing background noise to be reduced during eddy-curr will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-384226