GD钢下贝氏体相变研究  

Lower Bainitic Transformation of GD Steel

作　　者：文翠娥[1] 孙培祯[1] 谢长生 崔昆[1] 

机构地区：[1]北京航空航天大学,华中理工大学,北京航空航天大学一系第八研究室

出　　处：《钢铁研究学报》1995年第2期54-58,共5页Journal of Iron and Steel Research

摘　　要：利用ＴＥＭ研究了ＧＤ钢下贝氏体的组织形态，并探讨了贝氏体的相变机制。ＧＤ钢中下贝氏体是由一束贝氏体铁素体片条组成的，而每一片条又是由多个贝氏体相变基元组成。下贝氏体中普遍存在中脊。ＧＤ钢中存在一种类马氏体形貌贝氏体。研究表明，下贝氏体相变过程中必定存在切变。The microstructure of lower bainite in GD steel has been investigated with TEM,and the transformation mechanism of bainite has been studied.It is found that the lower bainite consists of packets of bainite ferrite plates,each plate is composed of several bainite transformation units,Bainite midrib exists generally. There occurs so called morphologically martensitoid bainite. The results show that there exists shear deformation in lower bainte transformation.

关 键 词：贝氏体 相变基元 类马氏体形貌 冷作模具钢 

分 类 号：TG142.45[一般工业技术—材料科学与工程] TG111.5[金属学及工艺—金属材料]