摘要
应用高分辨电子显微镜(HREM)观察M50NiL高温渗碳轴承钢中的马氏体和强化相Fe2Mo的形貌、结构及其与马氏体的取向关系。分析结果表明:M50NiL高温渗碳轴承钢心部组织主要为板条马氏体,表层组织主要为片状马氏体,其亚结构孪晶的孪生面为{211}晶面族;M50NiL钢中观察到纳米级强化相Fe2Mo,长条状,宽约2～3nm;部分Fe2Mo沿马氏体的孪生面生长,生长方向为[111]M;纳米级强化相Fe2Mo与马氏体的取向关系为:{112}M//{001}Fe2Mo,[1 11]M//[100]Fe2Mo。
The morphology, structure of Fe2Mo and its orientation relationship with martensite in M5ONiL high temperature bearing steel were observed by high resolution electron microscopy （HREM）. The results show that there is plate martensite in cementite sur- face layer, and lath martensite in the center of bearing steel M50NiL. A little of twin martensite is observed in the eementite surface lay- er, and the twin plane is martensitic { 112]. crystal plane. Precipitates Fe2Mo with width of 2 -3nm were observed in experimental steel, and grown along the twin plane between martcnsite bars, the width direction is perpendicular to the twin plane and the length direction parallel to the twin plane; the orientation relationship between the nano-precipitates Fe：Mo and twin martensite is
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2012年第4期44-48,共5页
Journal of Aeronautical Materials
基金
973资助项目(61385)
