Engineering Materials
Thermoplastic materials are those materials which

Are used as a friction lining for clutches and brakes
Are formed into shape under heat and pressure and results in a permanently hard product
Do not become hard with the application of heat and pressure and no chemical change occurs
Are flexible and can withstand considerable wear under suitable conditions

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Engineering Materials
Cyaniding is the process of

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

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