Ferrous Alloys 7.3.1

A phase of iron with a BCC structure

An interstitial solid solution of carbon in FCC iron

A type of heat treatment process

A phase found only in non-ferrous metals

To melt metals for casting

To remove impurities from metals

To alter mechanical properties by heating and cooling metals

To mix different metals into an alloy

Annealing

Galvanization

Hardening

Tempering

Rapid cooling in water or oil

Slow cooling to soften the metal

Heating without changing microstructure

Hardening the outer surface only

To make them brittle and hard

To relieve internal stresses and create a uniform grain size

To increase electrical conductivity

To dissolve carbon in iron

To increase hardness and make metal brittle

To reduce hardness and relieve internal stresses

To absorb carbon into the surface

To rapidly cool the metal in oil

Tempering

Ageing

Carburisation

Stress relieving

Nitriding

Curie temperature

Melting point

Austenite point

Critical Temperature

Annealing

Stress relieving

Case hardening

Precipitation hardening (Ageing)

0.6 %

2.14%

0.8%

1.14