Phase Diagram

Question 1

What is the general equation of Monotectic Reaction?

Answer 1

Liquid 1 → Liquid 2 +Solid 1

Question 2

What is the general equation of Eutectic Reaction?

Answer 2

Liquid → Solid 1 +Solid 2

Question 3

What is the general equation of Eutectoid Reaction?

Answer 3

Solid 1 → Solid 2 + Solid 3

Question 4

What is the general equation of Peritectic Reaction?

Answer 4

Liquid + Solid 1 → Solid 2

Question 5

What is the general equation of Peritectoid Reaction?

Answer 5

Solid 1 + Solid 2 → Solid 3

Question 6

ingot iron

Answer 6

Almost pure form of metal iron, consist only less than 0.5% impurities.

Question 7

Also known as iron carbide (Fe3C) contains 6.67wt% C. It is the hardest structure yet the most brittle.

Answer 7

CEMENTITE

Question 8

It’s maximum solubility is 2% C at 2065 degrees Fahrenheit

Answer 8

Austenite (gamma)

Question 9

Eutectic mixture of cementite and austenite, it contains 4.3% C

Answer 9

Ledeburite

Question 10

The softest structure in Iron-Iron Carbide phase diagram which dissolve 0.008% C at room temp.

Answer 10

Ferrite (alpha)

Question 11

Combination of Ferrite and Cementite. A eutectoid mixture of austenite containing 0.8% C at 1333 degrees Fahrenheit.

Answer 11

Pearlite

Question 12

An alloy containing less than 2% C is called as

Answer 12

Steel

Question 13

An alloy containing more than 2% C is called as

Answer 13

Cast iron

Question 14

What does the first digit of the classification of steels mean?

Answer 14

It indicates the types of steel in which belongs to i.e. 1- carbon steel, 2- nickel steel, 3- nickel chromium steel

Question 15

What does the second digit of the classification of steels mean?

Answer 15

indicates the approximate percentage(%) of the predominant alloying element

Question 16

What does the last 2-3 digit in the classification of steels mean?

Answer 16

It indicate the mean carbon content divide by 100