CAJ | 학술논문

稀土在钒微合金钢中有一定的固溶量，并可达10-5～10-4(质量分数)数量级。稀土降低碳氮化钒完全溶解的温度，阻止奥氏体中钒的应变诱导析出。在铁素体区稀土促进碳氮化钒析出，并细化沉淀相。钒和稀土复合微合金化有更强的推迟形变奥氏体动态再结晶，抑制奥氏体晶粒长大和细化晶粒的作用。
희토재범미합금강중유일정적고용량，병가체10-5～10-4(질량분수)수량급。희토강저탄담화범완전용해적온도，조지오씨체중범적응변유도석출。재철소체구희토촉진탄담화범석출，병세화침정상。범화희토복합미합금화유경강적추지형변오씨체동태재결정，억제오씨체정립장대화세화정립적작용。
The combined effect of V and RE in microalloy steel was studied by TEM, SEM, ICP and thermal simulation methods. The content of solid solution RE can reach 1×10-5～1×10-4 order of magnitude in steel. The solid solution RE can decrease the solution temperature of precipitated V(C,N), impede the precipitation of V(C,N) in austenite and accelerate and refine the precipitation of V(C,N) in ferrite. The combined effect of V and RE can delay the dynamic recrystallization, refine the grain and second phase particles, and promote the precipitation of V(C,N) considerably.