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Railway wagon axles are made by heating ...

Railway wagon axles are made by heating rods of iron embedded in charcoal powerder. The process is known as

A

Case hardening

B

Sherardizing

C

Annelaing

D

Tempering

Text Solution

Verified by Experts

The correct Answer is:
A
Case hardeing: The process of hardening the surface of wrought iron by depositing a surface layer of steel on it is called case-hardening it is done by heating wrought iron in cantact with potassium ferrocyanide.
Alternatively, case hardening can also be done by heating wrought iron with charcoal and then plunging it a suitable oil.
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Knowledge Check

  • Axles are made by heating rods of iron embedded in charcoal powder. The process is known as :

    A
    tempering
    B
    annealing
    C
    nitriding
    D
    case hardening

  • The heating rods of iron embedded in charcoal powder are used to make railway wagon axles. The process is known as

    A
    Case hardening
    B
    Sheradizing
    C
    Annealing
    D
    Tempering

  • When limestone is heated strongly, it gives off CO_(2) . In matallurgy this process is known as

    A
    Calcination
    B
    Roasting
    C
    Smelting
    D
    Ore dressing

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