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二次渗碳体
met.
secondary cementite
(【技】 Fe-C 系中高于共析成分的奥氏体从高温慢冷下来,在发生共析相变之前析出的渗碳体。它包括过冷奥氏体在形成珠光体之前析出的渗碳体。)
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