HEAT
TREATMEN
T

Lech Szurek
Adam Potrykus
III ESO

The aim



The process of Heat
Treatment



Critical Temperature
Range



Cooling material



Tempering



Annealing

Heat treatment

is the process of
the heating a
metal alloy to a
temperature
around its
melting point
and then cooling
it in a special
way

The aim of heat treatment is

to get required changes in

material properties

Each type of

steel has its

CRITICAL
TEMPERATURE
RANGE

, which is

the temperature
at which the steel
becomes solid.

In the process,

steel is heated to a

temperature

slightly above the

critical

temperature. This

temperature

usually ranges from

815°C to 1260°C.

At a next stage,

steel is cooled
under proper
conditions using
various cooling
media such as
oil, water or air

Steel that

has been
treated and
cooled in the
way
described, is
very

hard

and brittle.

Another

process is

TEMPERIN

G which is

just reheating

the steel to

its critical

temperature

Tempering

softens the
steel. The
process of
softening is
called

ANNEALIN
G

Steels that

have been
subjected to
these
processes are
very useful in
manufacturing
steel tools.

Sources of pictures

•

http://www.inductoheat.co.uk
/induction_heat_treatment.as
p

•

www.sermatech.com/
specialProcesses/heattreat.ht
ml

Sources of text

•

„English Across Marine
Engineering”

Wiesława Buczkowska,
2003 Gdańsk

Thank you for the
attention !!!