Post on 17-Feb-2018
7/23/2019 Diagramma FeC
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TFe-C
(Fe) , (.) 1539C.
: 910
C: Fe-
bcc.
(910, 1400): Fe-
fcc.
(1400, 1539o): Fe-
bcc.
, Fe.
Fe , :
, 768 C ( Curie)
. Fe-Fe-, (fcc
bcc).
, o Fe (C)
. Fe-C.
Fe-C
, (
).
Fe-C
Fe-C :() Fe-Fe3C (-) (
, . ), . . 1.
() Fe-C(-) (
), . . 2.
, ,
(),
Fe-C.
. 2
, . . 1.
1. Fe-C
1. H
.
2. 1135C, 1130
C.
3. H C 4.25%,
4.30%.
4. 738C, 723
C.
5. H C 0.69%,
0.80%.
6.
(Si)>0.7% ..,
,
(Si)
7/23/2019 Diagramma FeC
2/9
1: Fe-Fe3C
2
7/23/2019 Diagramma FeC
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2: () () Fe-C
3
7/23/2019 Diagramma FeC
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Fe-C
A. AC
:(C) < 0.008%.
:0.008 (C)2.11% ((C) > 1%).
:2.11 950
C)
().
(C)
, C.
: .
:
, .
4
7/23/2019 Diagramma FeC
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/
/-, L+.
/, L+Fe3C (/, L+C).
/ , L+.
/
/-, +.
/, +
/, + Fe3C (/, +C).
,
( ) 88.5%
11.5% . ()
(C)=0.8% 723C.
/, + Fe3C (/, +C),
( ).
(C)=4.3% 1130C.
: , ,
, 723C
().
() 1492
C, L (0.51%) + (0.10%) (0.18%)
(C) 1130C),
L (4.2%) (2.11%) + Fe3C(6.67%)
(S) 723C),
(0.8%) a (0.025%) + Fe3C(6.67%)
0: Curie (210oC)
1: (723oC)
2: Curie (768oC)
3: (C)0.8%,
GS (C).
4: -,
NJ (C).
m:0.8%(C)2.11%,
SE (C).
: ,
c, , , r,
. c3, Ar3, cm, rm... cr, .
5
7/23/2019 Diagramma FeC
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Fe-C
. (. 3)
3:
(-)
-, L
().
(C) (,
. 3) .
. (. 4)
()
.
(-)
+:
(i)
(ii) (Widmanstatten) .
()
(
).
+Fe3C
.
(
) .
. (. 5)
+Fe3C ( ) . .
6
7/23/2019 Diagramma FeC
7/9
.
+Fe3C
,
( ).
().
:
(i) ()
L+Fe3C .
(ii) ( + )
.
(iii)
+Fe3C.
(iv)
().
(v) +Fe3C
. , , ()
.
. 6 ,
.
4: o () , () , ()
7
7/23/2019 Diagramma FeC
8/9
5: o () , () , ()
8
7/23/2019 Diagramma FeC
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1 2
3 4
5 6
6: C1: Fe-C2: Fe-C3: Fe-C4: Fe-C5: Fe-C
6: Fe-C
9