In the martensitic transformation of an ultrahigh carbon steel (UHCS) containing 1.58%C, a kind of jujube-stone-like martensite has been observed in addition to lath and twinning martensites.

• 超高碳(1.；58%25C)钢中的马氏体相变产物除了板条马氏体、片状马氏体外；还发现枣核状马氏体