Question

What is inoculation of cast iron?

(a) Addition of sulphur alloys

(b) Addition of silicon alloys

(c) Addition of oxides

(d) Addition of parent metal’s ore

I have been asked this question at a job interview.

The doubt is from Furnaces for Melting topic in portion Pouring – Gating Design, Melting Furnaces, Melting and Casting Quality of Casting-Forming-Welding I

Answer 1

Correct option is (b) Addition of silicon alloys

The best I can explain: Inoculation of cast iron is the addition of certain silicon alloys to molten iron to produce changes in graphite distribution.