通过热模拟试验,研究了0.058%C-0.92%Mn-0.51%V钢在变形后等温过程中的组织变化规律及显微硬度变化规律,并用透射电镜研究了V(C,N)的沉淀析出规律.结果表明,变形后在650、700、750℃等温100 s时可获得单相铁素体组织,从而基本消除珠光体组织.等温转变过程中,铁素体先是主要沿奥氏体晶界形核,随后逐渐变为晶内形核.V(C,N)的沉淀析出存在两种形式:相间析出和随机析出.V(C,N)的相间析出消除了C元素在奥氏体中的富集,是获得单相铁素体组织的重要条件.
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