ֲ
.. 뺺, 25, 54,938, 0,13 . ( 4S² ' 3d-, , 3d- 6 ). - . ٳ 7,3 / ³, 1244 C, 2095 C, 14,6 / , 224,8 / . , . 75-85% Mn , ~ 1380 C. [1;2]
: Mn2C6 (5,4% C), Mn3C (6,77% C), Mn5C2 (8,03% C) Mn7C3 (8,57% C). ε-, . Mn-C (.2.1):
: , C
1 +δ-Mn↔γ-Mn 1120
P2 +ε-↔γ-Mn 1240
P3 +Mn C ↔ε- 1307
P4 +C ↔Mn7C3 1340
ϳ Mn3C 980-1040 C. , <1100 . 㳿 ó Mn7C3, Mn5C2 Mn23C6 -84540, -63430, -24960 / . Mn23C6 :
23Mn +6 C = Mn23C6 (T), (2.1)
ΔH0298 =- 24550 / .
Mn7C3 :
7Mn +3 C = Mn7C3, (2.2)
ΔH0298 =- 112400 / .
[1]
. 2.1 - ij . 2.2 - ij
Mn- Mn-Si
Mn-Si .2.2
Mn6Si, Mn9Si2 Mn11Si19, . , . Mn3Si, Mn5Si3, MnSi, MnSi17 17,0; 24,85; 30,5 28,15 / . [6]
³ : Mn6Si, Mn9Si2, Mn5Si3, MnSi . MnSi (33,8% Si), ΔH = 60,60 / , 1170 C. , . ٳ Mn-Si . 1773 30% 60% 5,31 4,35 /³. 25-70% 䳿 , . Mn-Si ' . , ﳿ ﳿ , 40-70%. Mn-Si .
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: MnO2, Mn2O3, Mn3O4, MnO. MnO, > 3000 C ΔH0298 = 385,186 / . г MnO = 1 :
lg [O] Mn = (-4823 / T) +1,159, (2.3)
1515 0,0095%. 1273 α-Mn3O4. = 20 (MnO), β-Mn3O4 1450º MnO, MnO → 1657º. [1;2]
, . . ³ : Mn3P, Mn2P, Mn3P3, MnP. Mn-P , . 1593. 15 0,5% 0,041 3*10-5 0,59 0,98. γ-Mn γ- 1573 Mn-P :
lg γMn= -4,29/[1+0,455(xMn/xP)2], (2.4)
lg γ=18,88{[1+0,455(xMn*xP)]-1-[1+0,455(x2Mn/xP)]-1}, (2.5)
Mn-P -ﳿ , Mn3P Mn2P Mn P. [3]
.2.3 , γ-Fe γ-Mn. α-Mn β-Mn ' 68-70% . Mn-Fe 1232 º 87%. 1300 50% . - 8360 / Mn = 0,7.
90% 㳿, , . , 3547-97, .2.1 [4]
. 2.3 - ij Mn-
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2.1-ճ , 3547-97
, % | ||||||
Mn | C | Si | P(A) | P() | S | |
88 | 85,0 88,0 . | 1,8 | 2,5 | 0,10 | 0,40 | ..0,35 |
- . 88 2,0% 0,1%, 0,4%. ' . ' .
: [6]
-: , , :
[Mn] Fe + [O] Fe = (MnO), (2.6)
KMn = aMnO / (aMn ao), (2.7)
Mn- ; MnO, Mn, O- , .
, ( ). , , , .
-: , Fe-C, , , .
- : 0,4-0,8% Mn, - 12-16% 25-30%, - 4 17%. , . 1 1,8% - 0,09% 216 65 , -58 -118 ˚ C. . , , 75 (75% Mn), - . , (εMn = -7,17) . [3]