Phase Diagrams - Part 1 Flashcards

1
Q

What does the XYWZ stand for in the AISI-SAE steel designation system?

A

X: Indicates the group of carbon steel
Y: Amount of alloy
WZ: Carbon concentration to 0.01%

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2
Q

What are the three main types of steel and their %C?

A
  1. Eutectoid %C = 0.76
  2. Hypoeutectoid %C < 0.76
  3. Hypereutectoid %C > 0.76
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3
Q

What is pearlite made up of?

A

Alternate layers of ferrite and cementite (Fe3C)

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4
Q

Fraction ferrite equation

A

X / X + Y

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5
Q

Fraction pearlite equation

A

Y / X + Y

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6
Q

What are the three types of steel made up of?

A

Hypoeutectoid - Ferrite + Pearlite
Eutectoid - 100% Pearlite
Hypereutectoid - Pearlite + Cementite

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7
Q

What are the three types of heat treatment

A
  1. Quenching
  2. Tempering
  3. Annealing
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