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General Steel Metallurgy 3
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The melting point of pure iron is
2800degF (1550degC)
When impurities in molten steel are not fluxed away by limestone, what is the finished product is called?
Pig Iron
Approximately how much carbon and silicon are in Pig Iron?
3%-4% carbon
1%-3% silicon
What minerals are fluxed away by limestone?
Calcium
Magnesium
Aluminum Oxide
Bessemer steel that is further refined into "duplexed" steel has what impurities removed?
Sulfur
Phosphorus
Iron Oxide
Two processes for reducing the carbon content of pig iron are:
The Bessemer Process and the Oxygen Process.
Tool steel and special-alloy steel can be refined in what type of furnace?
An Electric Arc (or Induction) furnace.
How much carbon is in low carbon steel?
Less than 0.30% carbon
How much carbon is in medium carbon steel?
0.30% to 0.70% carbon
How much carbon is in high carbon steel?
0.70% to 1.4% carbon
Low alloy steel contains what percentage of alloying elements?
less than 8% total alloying ingredients
High alloy steel contains what percentage of alloying elements?
more than 8% total alloying ingredients.
What ingredient is added to steel for deoxidation?
Aluminum
Which of these ingredients does not increase steel's hardness?
A. Chromium
B. Boron
C. Carbon
D. Titanium
D. Titanium
Titanium fixes carbon and reduces hardness.
Which two of these ingredients do not increase steel's strength?
a.manganese
b.nickel
c.molybdenum
d.silicone
a.
manganese
r
educes brittleness
by combining with sulfur.
b.
nickel increases toughness
, hardness, and corrosion resistance, but not strength.
Body-centered cubic steel is called
A. austenite
B. martensite
C. ferrite
C. ferrite
A hard and very brittle super-saturated solution of carbon in iron is called
A. austenite
B. ferrite
C. martensite
C. martensite
Face-centered cubic steel is called
A. ferrite
B. austenite
C. martensite
B. austenite
What is the approximate carbon content of cast iron?
2% carbon
What is the carbon content of wrought iron?
less than 0.1% carbon
What are the effects of low and high levels of chromium in steel?
Up to 2% increases hardenability. 4-18% increases corrosion resistance.
What are the effects of low and high levels of nickel in steel?
2-5% increases toughness. 12-20% increases corrosion resistance.
Iron Carbide is also known as
A. Cementite
B. Martensite
C. Pearlite
D. Banite
A. Cementite
It contains about 6.7% carbon.
Pearlite consists of what two components?
A. Ferrite and Banite
B. Martensite and Austenite
C. Austenite and Cementite
D. Ferrite and Martensite
E. Ferrite and Cementite
E. Ferrite and Cementite
FCC iron is also known as
A. Delta Iron
B. Gamma Iron
C. Alpha Iron
B. Gamma Iron
BCC iron can either be:
A. Alpha or gamma
B. Delta or gamma
C. Delta or alpha
D. Alpha or beta
C. Delta or alpha
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Author
RJVan
ID
235319
Card Set
General Steel Metallurgy 3
Description
Mechanical Professional Engineering Exam Review
Updated
2016-03-17T21:56:26Z
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