Engineering Materials
Cyaniding is the process of

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

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Engineering Materials
Tungsten in steel

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

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Engineering Materials
The unit cells

All of these
Have the same orientation and their similar faces are parallel
May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice
Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal

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