207) Which of the following element results in presence of free graphite in C.I.
Answer is:
silicon
Related Engineering Materials MCQ with Answers
Answer is:
is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
Explanation:
White cast iron Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost un-machinable
White cast iron is a cast iron without any alloy addition and with low Carbon and Si content such that the structure is hard brittle iron carbide with no free graphite.
A fast cooling rate prevents the precipitation of Carbon as graphite.
Answer is:
0.45 to 0.55%
Explanation:
Large forgings, crank shafts, axles made from cast iron or forged steel. Steel is usually used in high loading situations, and this steel contains carbon up to 0.45 to 0.55%.