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TECHNOLOGY
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Cards (9)
Annealing
Process
Heating steel to a
desired
temperature, holding it at that temperature for a period of time, then
slowly
cooling.
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Normalising
Process
Heating steel to a
desired
temperature, holding it at that temperature for a
short
period of time, then cooling in
air.
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Hardening
Process
Heating
high
carbon
steel until it's
red
hot then
quenching
it in cold
water
or
oil.
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Tempering
Process
Heating
high
carbon
steel to the
desired
temperature depending on the use case then
quenching
in
cold
water.
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Effects of
annealing
-
Increased
Toughness
-
Reduced
Hardness
-
Increased
Ductility
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Effects of
normalising
-
Increased
Hardness
-
Increased
Strength
-
Easier
to work
-
Increased
Brittleness
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Effects of
hardening
-
Increases
Hardness
-
Increases
Brittleness
(often
tempered
after to
reduce
brittleness)
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Effects of
tempering
(At
high
temperatures)
-
Reduced
Brittleness
-
Increased
Ductility
-
Reduced
Strength
-
Reduced
Hardness
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Effects of
tempering
(At
low
temperatures)
-
Reduced
Brittleness
-
Decrease
Ductility
- Increase Strength
- Increase Hardness
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