【摘要】 用Gleeble-1500热模拟试验机研究了非调质钢34Mn2VN(%:0.30～0.34C、1.20～1.70Mn、0.014～0.018N、0.07～0.12V)在950℃、平均应变速率2s-1、应变15%后以0.1～45℃/s不同冷却速率下冷却的动态CCT曲线和组织转变。结果得出,当冷却速率控制在0.8～2.0℃/s时所得到细小的铁素体和少量贝氏体组织,具有较高的冲击韧性。生产应用表明,采用该冷却速率生产Φ139.7×7.7(mm)和Φ114.0×6.4(mm)管材的冲击功为47.8～50.9J。更多还原

【Abstract】 Dynamic continuous cooling transformation(CCT)curves and structure transition of non quenched-tempered steel 34Mn2VN(0.30～0.34C,1.20～1.70Mn,0.014～0.018N,0.07～0.12V)at 950 ℃ with average strain rate 2 s-1 and 15% strain,then cooling with 0.1～45 ℃/s different rate have been studied by Gleeble-1500 thermal simulation machine.The results obtained that as cooling rate was controlled within 0.8～2.0 ℃/s,the fine ferrite and minor bainite structure was obtained,it had higher impact toughness.Commercial production application showed that the impact energy of Φ139.7×7.7(mm)and Φ114.0×6.4(mm)steel tubes produced with that cooling rate was 47.8～50.9 J.更多还原