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| multiple tempering (【技】对淬硬钢进行反复多次回火的热处理工艺。高合金钢淬火所得到的残留奥氏体稳定性高，在 500°C 以下回火不发生转变。为消除大量的残留奥氏体，必须加热到 500 ~ 600°C 保温，然后冷却时才发生残留奥氏体向马氏体的转变，形成部分新生马氏体。如此反复多次，残留奥氏体才基本转变完了。为消除每次新生的马氏体产生的内应力，也需要进行多次回火。) | |||
| multiple temperature | |||
| repeated tempering | |||
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