Means of determining extrusion temperatures

Details Means of determining extrusion temperatures Means of determining extrusion temperatures

1976-12-21

1977-11-08

Lanham, C.W.

Metal deforming

By extruding through orifice

72271, 72342, 73339R, B23C 2308

Patent

active

040569632

ABSTRACT:
In an extrusion process comprising the steps of fabricating a metal billet, heating said billet for a predetermined time and at a selected temperature to increase its plasticity and then forcing said heated billet through a small orifice to produce a desired extruded object, the improvement comprising the steps of randomly inserting a plurality of small metallic thermal tabs at different cross sectional depths in said billet as a part of said fabricating step, and examining said extruded object at each thermal tab location for determining the crystal structure at each extruded thermal tab thus revealing the maximum temperature reached during extrusion in each respective tab location section of the extruded object, whereby the thermal profile of said extruded object during extrusion may be determined.

REFERENCES:
patent: 2171180 (1939-08-01), Jones
patent: 2671559 (1954-03-01), Rosenkranz
patent: 3798942 (1974-03-01), Brackow
patent: 3839898 (1974-10-01), Talboom, Jr. et al.

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