, . 15, 20, 122, 18, 20 . . HRC58...63, 6, 40, 45, 40, 40 HRC45...55. , , , ( ). , . . .
, v1 ; γ . . . ( ), , , . , , v =5...30 / 10-1, . v ≤6 / 9-4, 10-4-4 . .; HRC≥45.
, , . . . , . v ≤2 / 15, 18 20. , . ; (), ( ). , . , .
12 , 13675-68 ( 311-76), 5, 6, 7, 8 9- . 7, 8 9- . v2, .
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43. . . : t = p1z1, u1 = p1z1n1. u2 = pd2n2 = pmz2n2. u1 = u2, z1n1 = z2n2 z1w1 = z2w2. ,
u = w1 / w2 = n1 / n2 = z2 / z1.
, . uS (. 3.38, ) . , :
/ cos g.
. 3.38 , () () , u , .
, . , , , . 1,5 .
, f¢
f¢ = f / cos a = tg j¢,
j¢ .
. 3.38. : ;
uS . .