F 0 (6.39). 6.7,
:
F 2 - 0,794×103× F + 15,75×104 = 0.
F 0 = 407,44. , F 0, , F 0 = 407,44 . 6.7 6.8, . .
, , , . , - . .
6.6.3
- , . [20], .
, , , () . , . , .
, , , , . , . , , .
. , . - , , (, , , , , ..), .. . .
, . , . , .
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, , , . (t) t / M (t) .
, , , , . - , , . , - , , . :
(6.42)
J , ; dJ / dt ; - ; q - ; - , ; k - . , . (6.42)
lg t = C 1× / + lg C 2, (6.43)
1 = q / (2,303× k); 2 = const; t - .
(6.43) lg t 1/, ( 6.6, ), . , 1 2 , lg C 2, φ tg φ = C 1× . , φ . 1 2 6.6, , . (1 / 2 - 1/ 1) , . , . , ( - ) ( ) . , ( ), . (6.43) , . , , , , .
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d n . , (6.43) . tg φ, (6.43) (%). (%) . , , , . , , , 20% , - 50%. , , . lg t 1 / , ( 6.6, ). 1 2. 1 / 1, 1 / 2 . lg (d / n) 1 / , ( 6.6, ), . (%) , .
t t = K yc× t .
K yc = [-(q / k) × (1 / 2 1 / 1)], (6.44)
1 2 - ( 1 > 2). , [20].