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請問,,淬火用空冷,,冷速能滿足條件么,? |
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點評
我知道啊,我是說硬度不對,,這個硬度不應(yīng)該是淬火硬度,,剛查了下,65mn調(diào)質(zhì)硬度也有hrc40以上了,。建議去查資料
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