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根據鋼種與熱處理工藝估算回火後硬度(HRC)
| 鋼種 | 淬火溫度°C | 水淬HRC | 回火軟化k | 臨界直徑mm | 用途 |
|---|---|---|---|---|---|
| 45 | 840 | 55 | 3.0 | 15 | 軸類、齒輪 |
| 40Cr | 850 | 55 | 2.5 | 25 | 軸類、連桿 |
| 42CrMo | 850 | 55 | 2.0 | 40 | 高強度軸 |
| T10 | 780 | 62 | 4.0 | 20 | 刀具、模具 |
| GCr15 | 840 | 62 | 1.5 | 30 | 軸承、量具 |
| Cr12MoV | 1020 | 60 | 1.0 | 100 | 冷作模具 |