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本文采用电解萃取-化学相分析法配合透射扫描电镜与能谱仪,研究了铌钒微合金化钢的析出相和析出行为。结果表明,在控轧冷却过程中不断地析出一种铌钒复合碳氮化物(Nb,V)(C,N),其中的铌钒比随析出温度而变:高温区形成富铌的碳氮化物;在低温区形成富钒的碳氮化物。经过三阶段轧制后,铌几乎全部脱溶,而钒则大约有一半在固溶体中。定量地研究了应变后等温处理过程中的应变诱导析出和随之而来的回溶现象。
In this paper, electrolytic precipitation - chemical phase analysis coupled with transmission electron microscopy and energy dispersive spectroscopy to study the precipitation of niobium and vanadium microalloyed steel and precipitation behavior. The results show that during the process of controlled rolling and cooling, a niobium vanadium compound carbonitride (Nb, V) (C, N) is continuously precipitated, of which the niobium vanadium ratio changes with the precipitation temperature: the niobium- In the low temperature region to form vanadium-rich carbonitride. After three-stage rolling, niobium is almost completely desolventized, while about half of vanadium is in the solid solution. The strain-induced precipitation and consequent remelting phenomena during isothermal treatment after strain have been quantitatively investigated.