Production of aluminium alloy strip

Details Production of aluminium alloy strip Production of aluminium alloy strip

1982-07-23

1984-01-31

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148128, 266 87, 266 90, C21D 154, C21D 1100

Patent

active

044287828

ABSTRACT:
In the heat treatment of aluminium alloy strip, in which hardening of the material is effected by heat treatment to dissolve pre-existing precipitates in the metal matrix followed by quenching and ageing, the electrical conductance of the strip after quenching is measured using a conductivity probe scanned across the width of the strip, the heating being controlled in accordance with the measured conductance so as to obtain uniform electrical conductance across the width of the strip. This measured electrical conductance has a close correlation with the required mechanical properties. A transmitter producing an electromagnetic field is moved across the strip and a receiver, picking up signals due to the eddy currents in the strip, provides an output automatically controlling the movement of flux modifiers of a transverse flux induction heater to control the strip heating.

REFERENCES:
patent: 1386645 (1921-08-01), Moore
patent: 3058840 (1962-10-01), Kerr et al.
patent: 3310736 (1967-03-01), Bayly et al.
patent: 4000458 (1976-12-01), Miller et al.
Schroder et al., "Measurement of the Surface Temperature of Cold Rolled Steel"; Testing of Matts. and Components by Infrared Radiation, pp. 129-137, 11/18/75.

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