The surface hardness of the following order is achieved by nitriding operation__________________?

Related Mcqs:

Hardness of steel depends on_________________?

A. amount of carbon it contains B. the shape and distribution of the car-bides in iron C. method of fabrication D. contents of alloying elements E. the quality of ore from which it is made...

Hardness of lower bainite (tempered martensite) is about________________?

A. RC 65 B. RC 48 C. RC 57 D. RC 80 E. RC 32...

A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as_________________?

A. allotropic change B. recrystallisation C. heat treatment D. precipitation E. austempering...

Tungsten in steel________________?

A. improves wear resistance, cutting ability and toughness B. refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties C. improves cutting ability and reduces hardenability D. gives ductility, toughness, tensile strength and anticorrosion properties E. raises its melting point...

Bell metal contains_____________________?

A. 70% copper and 30% zinc B. 90% copper and 10% tin C. 85-92% copper and rest tin with little lead and nickel D. 70-75% copper and rest tin E. 70-75% copper and rest zinc and tin...