一种亚稳态铁酸盐和碳化铁集合体，由奥氏体在低于珠光体温度但高于马氏体初温时变性而形成。
A metastable aggregate of ferrite and cementite resulting from the transformation of austenite at temperatures below the pearlite but above the marten site start temperature.
含铁碳化物或含碳铁的固体溶体，冷却可形成珠光体或马氏体。
A solid solution of ferric carbide or carbon in iron; cools to form pearlite or marten site.
钢的组织主要由针状铁素体和马氏体两相组成。
Mainly its metallographic structure consists of acicular ferrite and martensite.
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