..2
...3
3
..3
...4
..4
.5
..5
, 㳿 VICKERS..6
.7
ꅅ...7
..8
, , , , . 㳿 : 璺, , , , .
.
. .
.
RSt. 37-2 (Germany) .
³ 3.
1
ճ 3
ճ | % |
() | 0.14-0.22 |
(Si) | 0.12-0.3 |
(Mn) | 0.4-0.65 |
(Cr) | 0.3 |
ѳ(S), | 00.5 |
(P), | 00.4 |
̳(Cu), | 0.3 |
ͳ(Ni), | 0.3 |
(As), | 00.8 |
.3 , . . . , 䳿 .
.3 : , - , , . , : , , .
( ) . , . . ̳ :
|
|
= +Mn/6+(Ni+Cu)/15+(Cr+Mo+V)/5, %
, . 0.40, , - .
= 0.18+0.5/6+(0.3+0.3)/15+0.3/5 = 0.36 %
.
, , . , , . : , .
ǒ 2 1 5264-80.
璺 .
.
.
ij :
d = 3
:
F (6 8) d F =7 3=21
:
I.= F. d =d2 i/4 = 3.14 32 15/4 = 105
d ,2
/2,
(2036),
U= 28
:
V=(α I) / (100 F) = (8 105) / (100 7800 0.000126) = 12.23 /