Method of manufacturing metallic products such as sheet by cold working and flash anealing

Patent · Mon Jan 01 00:00:00 EST 2001

OSTI ID:874012

Hajaligol, Mohammad R ^[1]; Sikka, Vinod K ^[2]

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1. Midlothian, VA
2. Oak Ridge, TN

A metallic alloy composition is manufactured into products such as press formed or stamped products or rolled products such as sheet, strip, rod, wire or band by one or more cold working steps with intermediate or final flash annealing. The method can include cold rolling an iron, nickel or titanium aluminide alloy and annealing the cold worked product in a furnace by infrared heating. The flash annealing is preferably carried out by rapidly heating the cold worked product to an elevated temperature for less than one minute. The flash annealing is effective to reduce surface hardness of the cold worked product sufficiently to allow further cold working. The product to be cold worked can be prepared by casting the alloy or by a powder metallurgical technique such as tape casting a mixture of metal powder and a binder, roll compacting a mixture of the powder and a binder or plasma spraying the powder onto a substrate. In the case of tape casting or roll compaction, the initial powder product can be heated to a temperature sufficient to remove volatile components. The method can be used to form a cold rolled sheet which is formed into an electrical resistance heating element capable of heating to 900.degree. C. in less than 1 second when a voltage up to 10 volts and up to 6 amps is passed through the heating element.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Chrysalis Technologies Incorporated (Richmond, VA)
• Patent Number(s): US 6294130
• OSTI ID: 874012
• Country of Publication: United States
• Language: English

Related Subjects

method
manufacturing
metallic
products
sheet
cold
flash
anealing
alloy
composition
manufactured
press
formed
stamped
rolled
strip
rod
wire
band
steps
intermediate
final
annealing
rolling
iron
nickel
titanium
aluminide
product
furnace
infrared
heating
preferably
carried
rapidly
elevated
temperature
minute
effective
reduce
surface
hardness
sufficiently
allow
prepared
casting
powder
metallurgical
technique
tape
mixture
metal
binder
roll
compacting
plasma
spraying
substrate
compaction
initial
heated
sufficient
remove
volatile
components
form
electrical
resistance
element
capable
900
degree
voltage
10
volts
amps
passed
metallic alloy
flash annealing
remove volatile
resistance heating
volatile components
alloy composition
plasma spray
aluminide alloy
heating element
elevated temperature
electrical resistance
temperature sufficient
plasma spraying
metal powder
titanium aluminide
cold rolled
cold rolling
powder metallurgical
tape casting
rolled sheet
preferably carried
roll compaction
reduce surface
surface hardness
rolled products
stamped products
metallic products
element capable
volatile component
infrared heating
metallic product
resistance heat
tape cast
press formed
manufacturing metallic
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