Effect of carbon - Chilled cast iron

Q.  What is the effect of increased carbon content on chilled cast iron?
- Published on 11 Sep 15

a. Chilling depth increases
b. Hardness of chilled zone increases
c. Both a. and b.
d. None of the above

ANSWER: Hardness of chilled zone increases

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    Discussion

  • Sravanthi   -Posted on 21 Nov 15
    - Chilled cast iron consists of carbon, silicon and manganese.

    - As carbon content increases depth of chill decreases but hardness of the chilled zone increases. Increase in silicon and 0.1% phosphorus content also decreases depth of chill.

    - Carbide structure is refined by 0.1 inch nickel. The depth of chill unit is also decreased by manganese content.

    - The resistance of chilled face to spalling, pitting, chipping and heat checking can be improved by Molybdenum.

    - Chilled cast iron has high wear resistance, good abrasion and damping capacity.

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