iron carbon Flashcards
1
Q
ferrite starts at what state
A
BCC
2
Q
gamma iron is at what temp
A
912 c (FCC)
3
Q
delta iron at what state( delta ferrite)
A
BCC
4
Q
what temp delta ferrite melts
A
1538 c
5
Q
most fe-c alloys have less what concentration
A
7%
6
Q
pure iron wt concentration
A
0.008
7
Q
steel wt concentration
A
0.008-2.14
8
Q
cast iron wt concentration
A
2.14-6.67
9
Q
what’s the state after 6.67 wt-C
A
cementite
10
Q
whats the exact composition of Fe-C like
A
cementite
11
Q
what’s the bad effect of graphite in iron
A
increases wear resistance and decreases tensile strength
12
Q
alpha ferrite structure
A
BCC
13
Q
carbon dissolves less because of
A
bcc structure and few interstitials where c fits.
14
Q
how much max carbon ca be dissolved in alpha ferrite structure
A
0.022
15
Q
whats the gamma iron called
A
austenite
