. , , : σ F ≤ σ FP.
[7, . 29]
KF : KF = K KFv KF β KF α;
KFv , , [7, . 30, . 13]:
ω Fv , / [7, . 30, . 13]:
δ F , (. 5.7);
KF β , , ψ bd (. 5.4);
KF α , (. 5.9);
YFS , (. 5.5).
σ FP / YFS, , ;
Y β , ; Y β = 1 εβ (β / 120) ≥ 0,7 [7, . 32, . 13];
Y ε , ; εβ ≥ 1
Y ε= 1 / εα;
εβ < 1
Y ε = 0,2 + 0,8 / εα [7, . 32, . 13,];
KF = K KFv KF β KF α = 11,1121,11,35 = 1,652.
Y β = 1 εβ β / 120 = 1 1,005 (7,2522 / 120) = 0,9392 > 0,7
[7, . 32, . 13];
Y ε = 1 / εα = 1/ 1,6757 = 0,5967.
[7, . 62, . 20]:
ZV 1 = Z 1/ cos3β = 20/ cos37,2522 = 21,17;
ZV 2 = Z 2 / cos3β = 104/ cos37,2522 = 103,83.
, YFS 1 = 4,1; YFS 2 = 3,6 (. 5.5).
σ FP / YFS:
σ FP 1 / YFS 1 = 334,6 / 4,1 = 81,6;
σ FP 2 / YFS 2 = 277,9 / 3,6 = 77,2.
, σ FP 2 / YFS 2 < σ FP 1 / YFS 1:
σ FP 2 = 277,9 .
: 105,795 < 277,9 .
σ F 2 σ FP 2, , .
5.2
- | σ H lim b , | ||
, | 350 | σ H lim b = 2 + 70 | |
3850 HRC | σ H lim b = 17 HRC + + 200 | ||
56 HRC | σ H lim b = 23 HRC | ||
550750 HV | σ H lim b = 1050 |
|
|
5.3
- | |||||
40, 45, 50,40X, 40XH, 40X | , | 180350 | 1,75 HB | ||
40X, 40XA | 4555 HRC | 500550 | |||
40X, 40XH2MA | 4858 HRC | 2535 HRC | |||
20, 202, 122, 123 | 5663 HRC | 3045 HRC | |||
, | 700950 HV | 2440 HRC | 300 + 1,2 RC | ||
5.4
w ( 218566)
w, | |
40, 50, 63, 80, 100, 125,160, 200, 250, 315, 400, 500 | |
71, 90, 112, 140, 180, 224, 280, 355, 450, 560, 710 |
: 1 2.
5.5
m ( 956379)
m, | |
1,0; 1,25; 1,5; 2,0; 2,5; 3; 4; 5; 6; 8; 10; 12 | |
1,125; 1,375; 1,75; 2,25; 2,75; 3,5; 4,5; 5,5; 7; 9 |
: 1 2; m = 3,75; 4,25; 6,5 ; , .
5.6
15 10 6 3 | 12 8 5 2 | 30 15 10 4 | 20 10 7 3 |
5.7
δ F δ
δ F | δ | ||
1 2 350 | 1 2 350 | ||
: | 0,016 0,011 | 0,06 0,04 | 0,14 0,10 |
0,06 | 0,02 | 0,04 |
5.8
g 0
m, | 164381 | |||
3,55 | 3,8 | 4,7 | 5,6 | 7,3 |
10 | 4,2 | 5,3 | 6,1 | 8,2 |
10 | 4,8 | 6,4 | 7,3 | 10,0 |
5.9
KH α KF α
, / | KH α | KF α | |
5 | 1,03 1,07 1,13 | 1,07 1,22 1,35 | |
5 10 | 1,05 1,10 | 1,20 1,30 | |
10 15 | 1,08 1,15 | 1,25 1,40 |
. 5.3. KH β
. 5.4. KF β
|
|
. 5.5. YFS,