Engineering Materials
Free cutting steels

Contain carbon in free from
Require minimum cutting force
Is used where rapid machining is the prime requirement
Can be cut freely

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
Cyaniding is the process of

Dipping steel in cyanide bath
Obtaining cyanide salts
Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness
Reacting steel surface with cyanide salts

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
Chromium in steel

Improves cutting ability and reduces hardenability
Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
Improves wear resistance, cutting ability and toughness
Gives ductility, toughness, tensile strength and anti-corrosion properties

ANSWER DOWNLOAD EXAMIANS APP