P92钢中δ-铁素体内Laves相的长大规律  

Growth Behavior of Laves Phase of δ-Ferrite in P92 Steels

作　　者：石如星[1] 刘正东[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081

出　　处：《钢铁》2012年第6期55-59,共5页Iron and Steel

基　　金：国家科技支撑计划资助项目(2007BAE51B02);国家973计划资助项目(2010CB600804)

摘　　要：用透射电镜、扫描电镜对两炉δ-铁素体含量不同的P92钢中的Laves相形貌与尺寸进行了分析与测量。结果表明:在时效状态下,δ-铁素体内也有Laves相析出,其尺寸显著大于马氏体基体中的Laves相;δ-铁素体含量越高,δ-铁素体内的Laves相尺寸与增长速度越大;δ-铁素体含量对马氏体基体中的Laves相尺寸影响不大。The growth of Laves phase in P92 steel after aging at 600 ℃ was investigated by transmission electron mi croscopy（TEM）, scanning electron microscopy（SEM）. Experimental results show that Laves precipitate in δ-Fe region, and the size and coarsening rate are significant higher than the Laves phase in martensite matrix; the higher the content of 3-Fe, the greater the size and growth rate of Laves phase in the 3-Fe; the content of 3-Fe has little impact on the size of Laves phase in martensite matrix.

关 键 词：P92耐热钢 Δ铁素体 LAVES相 

分 类 号：TG142.1[一般工业技术—材料科学与工程]