9CrSi钢贝氏体转变过程中位向关系的改变  

THE CHANGE OF ORIENTATION RELATIONSHIP DURING BAINITIC TRANSFORMATION IN 9CrSi STEEL

作　　者：龚方岳[1] 刘文西[2] 王利杰[2] 陈玉如[2] 杨立波[2] 

机构地区：[1]天津大学材料系,天津市300072 [2]天津大学

出　　处：《金属热处理学报》1991年第3期12-16,共5页

摘　　要：本文应用透射电镜研究了9CrSi 钢的贝氏体相变。从组织形态上看,贝氏体片本身存在两个区域:即中脊附近的内部区和外侧的外部区。内部区中的贝氏体铁素体与奥氏体之间呈 N-W 位向关系,而外部区则呈 K-S 关系。两个区域的组织形态和碳化物分布均有所不同。根据这些事实,认为贝氏体相变在不同阶段具有不同的机制。In this paper,bainitic transformation in 9CrSi steel was inves-tigated by means of TEM.From characteristics of the structure morphology,bainitic platelet of the 9CrSi steel consists of two regions,the internalregion near its midrib and the external region.In the internal region,thebainitic ferrite is related to austeuite by N-W orientation relationship,but K-S one for the external region.The structure morphology andcarbide distribution of the two regions are altered correspondingly.These results indicate that the bainitic transformation process in the steelincludes two stages controlled by different mechanism respectively.

关 键 词：贝氏体 中脊 位向关系 9CrSi钢 

分 类 号：TG151[金属学及工艺—热处理]