高温长期时效12％Cr钢中Cr_（23）C_6变化规律研究  

TEM Study on Cr_(23)C_6 Behaviour in 12%Cr Steel at High Temperature Long Time Aging

作　　者：张金旺[1] 赵利平[1] 王乐才 李云香[1] 符长璞[1] 憨勇[1] 刘守智[1] 

机构地区：[1]太原重型机械学院,西安理工大学

出　　处：《金属热处理学报》1996年第1期16-20,共5页

基　　金：机械工业部基金

摘　　要：采用透射电镜分析、Ｘ射线衍射分析、电子探针分析和碳化物电解萃取相分析等方法，研究了２Ｃｒ１２ＭｏＶＮｂＮＢ耐热钢高温长期时效条件下Ｃｒ_（２３）Ｃ_６的析出部位与形态变化规律。结果表明：Ｃｒ_（２３）Ｃ_６相约占该钢全部强化相的６４％，是主要强化相。Ｃｒ_（２３）Ｃ_６在奥氏体晶界和板条马氏板条界及板条群界析出、由长条状变为球状或块状的过程受Ｃｒ元素体扩散控制。The Cr23C6 behaviour in 2Cr12MoVNbNB heat resisting steel at high temperature long time aging is investigated by means of transmission electron microscope、X ray diffraction 、electron probe and electrolytic extraction etc. The results show that Cr23C6 is mainly precipitated in the steel,which comprises 64 precent of the second phases in the steel, and that Cr23C6 is precipitated at intercrystalline of austenite and the boundary of lath martensite, and that the Cr23C6 changing from the band to sphericity is controlled by the Cr block diffusion.

关 键 词：Cr23C6 析出 扩散 长大 溶解 铬钢 耐热钢 

分 类 号：TG142.73[一般工业技术—材料科学与工程]