[問題] 恨鐵不成鋼
生鐵、鋼、熟鐵的分別大家應該都知道,
俗語說恨鐵不成鋼,
請問這個鐵到底是生鐵還是熟鐵?
鐵匠打鐵的時候,
除了打出形狀以外,也是在調整碳的比例。
但是到底是把碳打進去,還是把碳打出來?
我以前一直覺得是熟鐵→鋼。
但古代來說要還原成熟鐵應該比較困難,
應該是獲得生鐵比較容易,再慢慢打成鋼。
請問恨鐵不成鋼(打鐵過程)
到底是生鐵變成鋼?
還是熟鐵變成鋼?
抑或是都有可能?
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