SU714265A1 - Method of manufacturing check specimen for flaw detection - Google Patents

Description

(54) METHOD OF MANUFACTURING A CONTROL SAMPLE FOR DEFECTIC

applied by electroerosion cutting using an eoweter with a diameter of OD mm

The drawing shows the control of,

According to izofetenii, the proposed method: was carried out on plates of steel grade EI-961 in VNS-17, 135 mm long, 12 mm wide, 3 mm thick,

On the side of the cribs plate electro-cutting using copper; wires with a diameter of 0.1 mm were slit 1 mM deep. Spine iron nitrates to a depth of about 3 mm, followed by mechanical processing (grinding and polishing to remove the layer to 0.04 mm),

Plates prepared in such an offphase were loaded on a test machine up to 5 tons. Large sections were tested in sections with large pressure gauges and 1i6fQS Tracts were placed in the zone and length; стра stranilis11 for the entire width of the image. Loading of 1-stodil in the experimentally selected interval of loads, which ensures that tpferiiBH of a given size is obtained. In the case of a treshing width from 0.1 to) 1O micromylase 1 phi 54senin up to 75 kg / mmG, the third was detected and measured by the width of the openings with nuMt tdbto 1 tillographic and elecron microscope.

The implementation of the method confirmed the potential for significantly simplifying the positioning of the cracks, which made it possible to create a control of

for gas sorption flaw detection with a crack opening width of 0.051 MKM.

The proposed method will allow more than 5O times to reduce the time for the detection and measurement of microcracks.

 the invention

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Claims (3)

1, A method for fabricating a reference inspection for flaw detection, concludes in that. nitrate the surface layer of the offshore plate to a predetermined depth and apply loads to it until cracks are obtained, characterized in that, in order to obtain 1 cracks of the depth of the depth of the predetermined depth, before nitriding, on the side faces of the plastic, the slots and ticks are applied to the cracks formed the load in the direction perpendicular to the test plan, 2, The method according to p. 1, about tlc ch yusch and with the fact that, in order to standardize the created cracks, cut through the cutting of electroerosion cutting using a wire diameter 0, 1 mm, - -; : ..,,. . - ., .Information sources, accepted jap attention when examining 1, T1iggitle W-D. et al. Detection of fatigue cracks by nondestructive control methods, 3. Ma t Evci Е1974, t, 32 No. 10, 2, US Patent No. 3791198, class 73-53, 1974, 3. USSR author's certificate M 266331, cl. G 01 N 27 / 84,1970 (prototype).