1. . ..., . .. , , , 1969 .
2. : . . . .. .. , , 1983 . 480 .
3. . . . , , 1975 .
4. . .., , , 1982 .
5. , . .. , , , 1986 .
6. 7.090404 / .: .. .-: - , 2002.- 38 .
7. . IJ 7. 090510 / .: .. .- , IJ, 2005.- 34 .
.
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: .
, : 1) ;
, ( ): 10.
, , :
= 145 = 0,145 .
: t0 = 10 .
ʳ : t..= 790 .
: Dt = 12 .
--: = 0,66.
-: = 0,80.
в
: l, , () i, , . l=f(t), =f(t), i=f(t), , , .
10, [1, . 512]:
C = 1,0 %; Mn = 0,5 %; Si = 0,25 %; P = 0,045 %; S = 0,04 %,
, Mn, Si, P, S , , , , %.
0 10 0 :
0 = 1,163(60 - 8,7 - 14,4 Mn - 29,0 Si) =
= 1,163(60 - 8,7.1,0 - 14,4.0,5 - 29,0.0,25) = 42,86 /(×).
t:
200 = 0,95. 0 = 0,95.42,86 = 40,72 /(.);
400 = 0,85. 0 = 0,85.42,86 = 36,43 /(.);
600 = 0,75. 0 = 0,75.42,86 = 32,14 /(.);
800 = 0,68. 0 = 0,68.42,86 = 29,14 /(.);
1000 = 0,68. 0 = 0,68.42,86 = 29,14 /(.);
1200 = 0,73. 0 = 0,73.42,86 = 31,23 /(.).
|
|
= f(t).
:
= 7880 - 40C - 16Mn - 73Si;
= 7880 - 40.1,0 - 16.0,5 - 73.0,25 = 7813,7 /3.
[1, 13] () it t:
t = 100 i100 = 48,6 /;
t = 200 i200 = 99,2 /;
t = 300 i300 = 154,5 /;
t = 400 i400 = 211,0 /;
t = 500 i500 = 274,1 /;
t = 600 i600 = 346,3 /;
t = 700 i700 = 421,9 /;
t = 800 i800 = 544,3 /;
t = 900 i900 = 605,0 /;
t = 1000 i1000 = 670,7 /;
t = 1100 i1100 = 741,1 /;
t = 1200 i1200 = 804,3 /.
(ﳿ) 10 i =f(t).
, :
- - (t = const);
- - , (t = 790 = const).
. t0 = 10 t1 = 650 , - t1 = 650 t. = 790 .
:
t= t. + 100 =790 + 100 = 890 .
, . , S, :
S = hc = = 0,145 .