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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)

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1: Fe-Fe3C

2

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2: () () Fe-C

3

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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

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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

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Fe-C

. (. 3)

3:

(-)

-, L

().

(C) (,

. 3) .

. (. 4)

()

.

(-)

+:

(i)

(ii) (Widmanstatten) .

()

(

).

+Fe3C

.

(

) .

. (. 5)

+Fe3C ( ) . .

6

7/23/2019 Diagramma FeC

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.

+Fe3C

,

( ).

().

:

(i) ()

L+Fe3C .

(ii) ( + )

.

(iii)

+Fe3C.

(iv)

().

(v) +Fe3C

. , , ()

.

. 6 ,

.

4: o () , () , ()

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5: o () , () , ()

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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

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