1.1 炭素当量と変態温度の計算式
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| ●変態温度（ºC) |
Ac3 = 937.2 - 436.5C + 56Si - 19.7Mn - 16.3Cu - 26.6Ni - 4.9Cr + 38.1Mo
+ 124.8V + 136.3Ti - 19.1Nb + 198.4Al + 3315B
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Ac1 = 750.8 - 26.6C + 17.6Si - 11.6Mn - 22.9Cu - 23Ni + 24.1Cr + 22.5Mo
- 39.7V - 5.7Ti + 232.4Nb - 169.4Al - 894.7B
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Ms = 521 - 353C - 22Si - 24.3Mn - 7.7Cu - 17.3Ni - 17.7Cr - 25.8Mo
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| ●炭素当量 |
| CE(IIW) = C + Mn/6 + (Cu+Ni)/15 + (Cr+Mo+V)/5 |
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| CE(WES) = C + Si/24 + Mn/6 + Ni/40 + Cr/5 + Mo/4 + V/14 |
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| Pcm = C + Si/30 + Mn/20 + Cu/20 + Ni/60 + Cr/20 + Mo/15 + V/10 + 5B |
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| CEn = C + f(C){Si/24 + Mn/6 + Cu/15 + Ni/20 + (Cr+Mo+Nb+V)/5} |
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| ここで, f(C) = 0.75 + 0.25tanh{20(C - 0.12)} |
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