1. III
  2. ) , ;
  3. ) : .
  4. - .
  5. ֲͲ ²
  6. . .
sH lim b,
- <350 2 + 70
' HRC 38-50 18 HRC +150
HRC 40-50 17 HRC+200
- HRC > 56 23 HRC
HV 550 -750
. NHO , < 200 NHO= 107; 200-500 NHO 107 6 . 107.

3.3. ,

ij , , s, , s, ()
100-500
9090-120. 120
30 140. 140
40 120120-160. 160
40 150150-180.180

. 3.3.

ij , , s, , s, ()
4045 -
3535 -
, HRC
30, 35, 40, 40123, 1824, 2020, 25, 30, 35302, 382, 4040, 40, 35 45 - 5550 - 6356 - 6356 - 6345 - 63 , ͳ

[s] = 0,45 ([s1] + [S2]), (3.10)

[s1] [s2] - ;

[s] ? 1,23 [s min],

[s min], , [s2].



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