【摘要】 用Gleeble-3800热模拟试验机结合金相分析研究了低碳Nb-V微合金化钢奥氏体连续冷却过程的相变规律。结果表明:试验钢的动态CCT曲线和静态CCT曲线相比,整体向左上方移动,随冷却速度的增大,A→α-Fe相变开始温度逐渐降低;高温变形促进铁素体和珠光体相变,缩小了铁素体转变区;当冷速较低时变形促进贝氏体转变,冷速较高时变形抑制贝氏体转变。更多还原

【Abstract】 The transformation behavior of Nb-V micro-alloyed low carbon austenite steel during continuous cooling was investigated through Gleeble-3800 themomechanical simulator and metallographic analysis.The experimental results show that the dynamic CCT diagrams shift to the left and upper compared with the static ones,the begin temperature of A→α-Fe transformation is gradually lower with the increase of cooling rate.The high temperature deformation improves Ferrite and Pearlite transformation and decreases Ferrite transformation zone.When the cooling rate is lower,the deformation improves Bainite transformation;when the cooling rate is higher,the deformation restrains Bainite transformation.更多还原