张宇光,赵爱民,王艾青,马海,赵征志

• 1:北京科技大学冶金工程研究院

摘要(Abstract)：

利用金相显微镜、X射线衍射等方法研究了0.15C-1.46Si-1.56Mn-0.06Nb冷轧TRIP钢板等温淬火温度对组织和力学性能的影响。结果表明,试验钢最佳的临界热处理工艺:在840℃两相区保温180 s,再快速冷却到420℃并在该温度保温240 s,进行贝氏体等温转变处理。采用这种热处理工艺,试验钢的微观组织为铁素体+贝氏体+残留奥氏体,其中铁素体占72%,贝氏体占20%,残留奥氏体占8%,可获得较佳的相变诱发塑性和较好的强韧性配合,其强塑积可达到2.5×104MPa.%,提高或降低贝氏体等温淬火温度都会降低强塑积。结果还表明,在840℃,适当的延长热处理时间可以提高残留奥氏体体积分数及残留奥氏体的碳含量,有助于提高材料的强塑积。

关键词(KeyWords)： TRIP钢;相变诱发塑性;等温淬火温度;残留奥氏体

Abstract:

Keywords:

基金项目(Foundation): 国家“十一五”科技支撑计划(2006BAE03A06);; 北京市科委重大项目(D07010300700701)

作者(Author): 张宇光,赵爱民,王艾青,马海,赵征志

DOI: 10.13289/j.issn.1009-6264.2010.02.020

参考文献(References)：

• [1]Zackay V F,Pacher E R.The enhancement of ductility on high-strength steels[J].Trans ASMSoc Mat,1967,60(2):252-258.
• [2]Ushilda K.Recent developments in steel sheets[J].Scandinavian Metall,1999,28:33-39.
• [3]Fischer F D,Reisner G,Werner E,et al.A new view on transformation induced plasticity(TRIP)[J].International Journal of Plasticity,2000,16:723-725.
• [4]王利,朱晓东,张丕军,等.汽车轻量化与先进的高强度钢板[J].宝钢技术,2003,(5):53-59.WANG Li,ZHU Xiao-dong,ZHANG Pi-jun,et al.Lightweighting of automobiles and advanced high strength steel[J].Bao Steel Technology,2003,(5):53-59.
• [5]Tomita Y,Morioka K.Effect of microstructure on transformation-induced plasticity of silicon containing low-alloy steel[J].MaterialsCharacterization,1997,38:243-250.
• [6]Hanzaki A Z,Hodgson P D,Yue S.The influence of bainite on retained austenite characteristics in Si-Mn TRIP steel[J].ISIJ Int,1995,35:81-83.
• [7]Sugimoto K I,Misu M,Kobayashi M.Effects of second phase morphology on retained austenite morphology and tensile properties in a TRIP-Aideddual-phase steel sheet[J].ISIJ Int,1993,33:775-778.
• [8]Basuki A,Aernoudt E.Influence of rolling of TRIP steel in the intercritical region on the stability of retained austenite[J].Materials ProcessingTechnology,1999,89:37-43.
• [9]Gallagher MF,Speer J G,Matlock D K.Effect of annealing temperature on austenite decomposition in a Si-alloyed TRIP steel[C]//Damm E B,Merwin M J.Symposium on the thermodynamics,kinetics,characterization and modeling of austenite formation and decomposition.Chicago:Illinois,The Iron&Steel Society and TMS,2003:563-576.

文章评论(Comment)：