Steel Making

Question 1

What type of iron is produced in a blast furnace?

Answer 1

Usable engineering steel

Question 2

What three materials are added to a blast furnace during the production of pig
iron? What is the main purpose of each?

Answer 2

1) Iron Ore: source of elemental Iron
2) Limestone: flux agent that removes impurities and forms slag
3) Coke: reducing agent that removes Oxygen from the iron ore

Question 3

What are the 2 most common furnace types?

Answer 3

Basic oxygen furnace
Electric arc furnace

Question 4

What is meant by the term basic?

Answer 4

Refractory lining of the basic oxygen furnace that has a high pH

Question 5

What are two casting methods used to produce steel?

Answer 5

Continuous casting
Ingot casting

Question 6

Name and describe the four basic types of steel ingot structures produced
by teeming.

Answer 6

1) Rimmed steel: no deoxidants are added
2) Semi-killed steel: small amounts of deoxidants are added
3) Fully killed: fully deoxidized steel
4) Capped: cao or a seal is placed over the mold to suppress gas evolution

Question 7

What is meant by segregation?

Answer 7

Changing alloy composition through the ingot due to changing cooling rates

Question 8

Which of the above Ingot structures are considered the superior product?

Answer 8

Fully killed

Question 9

What rolling direction usually has the highest strength?

Answer 9

direction parallel to the rolling direction

Question 10

What is anisotropy?

Answer 10

When metal grains are turned into long stringers in the rolling direction