Device for measuring the ferrite content in an austenitic stainl

Details Device for measuring the ferrite content in an austenitic stainl Device for measuring the ferrite content in an austenitic stainl

1974-10-29

1976-02-10

Corcoran, Robert J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 3312

Patent

active

039380378

ABSTRACT:
A device is provided for measuring the ferrite content of austenitic stainless steel weld material. The device includes a base plate for rotatably mounting a mechanical vernier member thereupon; the mechanical vernier member supports a cantilever beam in a manner to provide vertical positioning of the beam. Suspended from the free end of the beam is a permanent magnet below which is positioned the specimen of austenitic weld material which is to be tested. Strain gauges are provided on the top surface of the beam for measuring the magnetic force between the magnet and weld material by measuring the amount of downward deflection of the beam. The measurement is then converted into a reading which indicates the percentage of ferrite of the weld material in the joint.

REFERENCES:
patent: 3013204 (1961-12-01), Ford, Jr. et al.
patent: 3244971 (1966-04-01), Thompson
Entin, S. D.; Mag. Method of Quantitative Determinator of Ferrite In Weld National; Weld Proc.; Vol. 19; No. 2 (Feb. 1972) pp. 21-26.

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