铌、钛微合金化仿晶界型铁素体／粒状贝氏体复相钢的形变诱导铁素体相变的研究  

Study on Deformation Induced Ferrite Transformation of the Grain Boundary Allotriomorphic Ferrite/granular Bainite (FGBA/Bg) and Nb-Ti Microalloyed Duplex Steel

作　　者：黄海冰[1] 白秉哲[1] 冯勇[2] 徐洪庆[2] 

机构地区：[1]清华大学材料科学与工程系,北京100084 [2]济南钢铁集团公司,山东济南250101

出　　处：《金属热处理》2006年第z1期124-129,共6页Heat Treatment of Metals

基　　金：国家高技术研究发展计划(863计划)

摘　　要：以仿晶界型铁素体型／粒状贝氏体复相钢为对象,研究了铌、钛微合金化对其形变诱导铁素体相变的影响以及以仿晶界铁素体／粒状贝氏体为基本组织的复相钢形变诱导铁素体相变规律。研究表明,仿晶界铁素体／粒状贝氏体复相钢进行微合金化,会使其形变诱导铁素体相变受到抑制而推迟;同时因为微合金元素的加入,细化了相变中诱导析出的铁素体晶粒,有利于复相钢中粒状贝氏体的形成。形变参数对相变过程有着显著的影响,奥氏体化温度决定了奥氏体原始晶粒尺寸同样影响着形变诱导铁素体相变过程。采用合适的形变参数和奥氏体温度都可以促进形变诱导铁素体相变的进行从而细化铁素体晶粒。The effect of the deformation induced ferrite transformation processing about plain carbon grain boundary allotriomorphic ferrite/granular bainite (FGBA/Bg) duplex steel with broad application prospective was studied. Through the research of DIFT of the microalloying steel ,we can know that microalloying restrains the process of DIFT and refines the ferrite grain size. Deforming parameters can have remarkable effect and the austeniting temperature can determine the original austenite grain size, consequently influence the process of DIFT. Adopting appropriate deforming parameters and austeniting temperature can boost the process and refine ferrite grain size.

关 键 词：晶粒细化 形变诱导铁素体相变 仿晶界型铁素体/粒状贝氏体 微合金化 

分 类 号：TG113.12[金属学及工艺—物理冶金]