摘要
开发了0.06C-1.08Si-1.64Mn-0.30Mo-0.039Nb-0.01Ti铁素体-贝氏体微合金化(F+B)钢;用Gleeble.1500热模拟机测定了该实验钢在900℃变形50％后0.5～40℃／s冷却速度下的连续冷却转变曲线(CCT),并分析了形变奥氏体的相变组织。结果表明,该钢的CCT曲线分为多边形铁素体转变区和贝氏体转变区两大部分,中间被奥氏体亚稳区隔开;当冷速≤2℃／s时,钢中出现多边形铁索体,当冷速≥5℃／s时,组织主要为粒状贝氏体和板条贝氏体。
Ferrite-bainite （ F ＋ B） microalloying steel 0. 06C-1.08Si-1.64Mn-0. 30Mo-0. 039Nb-0. 01Ti has been developed; continuous cooling transformation （CCT） diagram of 50% deformed test steel at 900 ℃ and with cooling rate 0. 5 -40 ℃/s was obtained by Gleeble-1500 thermal simulator, and phase transformation structure of deformed austenite was analyzed. Results showed that the CCT diagram was composed of polygonal ferrite transformation region and bainite transformation region which were divided by metastable austenite region; as cooling rate was ≤2 ℃/s, polygonal ferrite oc- curred in steel and as the cooling rate was ≥5 ℃/s, main Structure in steel consisted of granular bainite and lath bainite.
出处
《特殊钢》
北大核心
2007年第3期35-37,共3页
Special Steel
基金
中信-CBMM铌钢研究与开发基金资助项目(编号:2006RMJS-D017)
