Which elements increase chilled depth of cast irons?

Q.  Which of the following elements increase/s chilled depth for chilled cast irons?
- Published on 11 Sep 15

a. Silicon
b. Manganese
c. Manganese sulphide
d. All of the above

ANSWER: Manganese sulphide

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    Discussion

  • Sravanthi   -Posted on 21 Nov 15
    - Chilled cast iron consists of 2.8 to 3.6% carbon, 0.5 to 0.8% silicon and 0.4 to 0.6% 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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