Presence of silicon in steel_____________________?
Correct answer: B. Decreases the blow holes formation tendency in castings
- A. Is in the form of free Si
- B. Decreases the blow holes formation tendency in castings
- C. Indicates that steel is not deoxidised properly
- D. None of these
Explanation
Silicon is commonly added to steel as a deoxidiser, removing dissolved oxygen and thereby reducing carbon-monoxide blowholes during solidification. It is therefore not normally present merely as free silicon in the steel.
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