- | σF lim, | ||
, | (180300) | (180300) | 1,8 HB |
(4855) HRC | (250320) | ||
(4855) HRC | |||
(550750) HV | (3242) HRC | 300 + 12HRC | |
(5662) HRC | (3245) HRC |
1.3.2. :
sF = 1,75 , , , ; sF = 1,55
1.3.3. :
, (7)
, (8)
NF lim = 4106 ;
NF 1 NF 2 - (NF = NH).
1 ≤ kFL ≤ 4 - 350 ,
1 ≤ kFL ≤ 2,5 - 350 .
NF > NF lim, kFL = 1.
1.3.4.
, (9)
γFC = 0,35, HRC < 35; γFC = 0,25, HRC ≥ 35; γFC = 0,1, ; , ' '' , .
2. w ()
, (10)
2 , ͷ;
u ;
Ψba (Ψba = b/aw) (. 2.1);
β (. 2.2);
v (. 2.3);
α (. 2.4);
(. 2.5);
- ;
- ;
(10) + - , - - .
2.1. . , :
Ψba = 0,300,50 ;
Ψba = 0,250,40 ;
Ψba = 0,200,25 ;
Ψba = 0,400,60 .
Ψba = 0,10,2.
2.2. β () Ψbd = b/d 1 . 2.2.1.
2.2.1
β
1,0 < Ψbd < 1,6 | ||
HRC ≥ 35 | HRC < 35 | |
1,0 + 0,766 Ψbd | 1,0 + 0,3466 Ψbd | |
1,0 + 0,275 Ψbd | 1,0 + 0,1275 Ψbd | |
1,0 + 0,1388 Ψbd | 1,0 + 0,0086 Ψbd | |
Ψbd < 1,0 | ||
1,0 + 0,766 Ψbd | 1,0 + 0,4466 Ψbd | |
1,0 + 0,275 Ψbd | 1,0 + 0,1 Ψbd | |
1,0 + 0,052 Ψbd | 1,0 + 0,0373 Ψbd |
: Ψbd = 0,5 Ψba (u 1).
|
|
, 6.
≤ 350 > 350
. 6. β
( , 7)
. 7.
2.3. v = 1,0.
2.4. : α = 1,05, α = 1.
2.5. = 430 , = 495 ( 21354 87).
R40 (. 2.2.2), , .
2.2.2
, ( 6636 69)
3,2 | 5,6 | ||||||||
3,4 | 6,0 | 10,5 | 34/35 | 60/62 | |||||
3,6 | 6,3 | 63/65 | |||||||
3,8 | 6,7 | 11,5 | 67/70 | ||||||
4,0 | 7,1 | 71/72 | |||||||
4,2 | 7,5 | ||||||||
4,5 | 8,0 | 45/47 | |||||||
4,8 | 8,5 | ||||||||
5,0 | 9,0 | 50/52 | |||||||
5,3 | 9,5 | 53/55 |
: .
3.
(11)
4.
, b 1 , b 2:
(12)
5.
(13)
6.
, (14)
Km (. 6.1);
KF (. 6.2);
[σF]min [σF]1 [σF]2;
(2 ͷ; b 2 d 2 ; [σF]min ).
6.1. :
Km = 3,5 , Km = 5,0 .
6.2. KF = KFβKFv,
|
|
KFβ (. 6.2.1);
KFv (. 6.2.2).
6.2.1. KFβ () Ψbd = b/d 1 . 2.6.1.
2.6.1
Fβ
1,0 < Ψbd < 1,6 | ||
HRC ≥ 35 | HRC < 35 | |
1,0 + 1,2 Ψbd | 1,0 + 0,733 Ψbd | |
1,0 + 0,417 Ψbd | 1,0 + 0,294 Ψbd | |
1,0 + 0,265 Ψbd | 1,0 + 0,125 Ψbd | |
Ψbd < 1,0 | ||
1,0 + 1,2 Ψbd | 1,0 + 1,1 Ψbd | |
1,0 + 0,42 Ψbd | 1,0 + 0,22 Ψbd | |
1,0 + 0,155 Ψbd | 1,0 + 0,07 Ψbd |
, 8.
≤ 350 > 350
. 8. Fβ
( , 7)
6.2.2. Fv = 1,0.
( 9563 - 80), mn ≥ mno (. .2.6.2), mn = (0,010,02) aw.
2.6.2