Means of determining extrusion temperatures

Patent · Fri Dec 31 23:00:00 EST 1976

OSTI ID:862955

McDonald, Robert E ^[1]; Canonico, Domenic A ^[2]

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1. Oliver Springs, TN
2. Oak Ridge, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 4056963
• OSTI ID: 862955
• Country of Publication: United States
• Language: English

Related Subjects

/72/374/
billet
comprising
crystal
crystal structure
depths
desired
determined
determined time
determining
examining
extruded
extrusion
extrusion process
fabricating
forcing
heated
heating
improvement
improvement comprising
increase
inserting
location
maximum
maximum temperature
means
metal
metallic
orifice
plasticity
plurality
predetermined
predetermined time
process
process comprising
produce
profile
randomly
reached
respective
revealing
section
sectional
selected
selected temperature
step
steps
structure
tab
tabs
temperature
temperatures
thermal
time
whereby