赵爱民,张宇光,赵征志,张明明,唐荻,李本海

• 1:北京科技大学冶金工程研究院
• 2:首钢技术研究院

摘要(Abstract)：

为了研究Al和P合金元素在TRIP钢固态相变过程中的作用,研究了4种不同合金成分C-Mn-Al-P TRIP钢的CCT图。结果表明,Al元素强烈的缩小奥氏体相区,提高Ac3与Ms。Al元素促使CCT图左移和上移。P元素能够阻碍碳化物的生成,当钢中P含量达到0.14%,能显著的将CCT图中的珠光体区与贝氏体区右移。P元素对铁素体相变和马氏体相变没有显著影响。利用类平衡下切变长大模型估算了4种TRIP钢的Bs点(A6钢为567℃,P1钢为556℃,P2钢为514℃,P3钢为548℃),与实际测量值吻合较好。研究表明在相同条件下,Al元素降低ΔμFγ→e,cαh,即增加相变驱动力,同时还降低ΔGmsh,eFaer,即降低切变阻力,提高Bs点。P元素增加ΔGmsh,eFaer,即增加切变阻力,降低Bs点。

关键词(KeyWords)： 相变诱发塑性;连续冷却转变;相变热力学;贝氏体;铝

Abstract:

Keywords:

基金项目(Foundation): 国家“863”计划(2008AA03Z502);; 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): 赵爱民,张宇光,赵征志,张明明,唐荻,李本海

DOI: 10.13289/j.issn.1009-6264.2011.04.020

参考文献(References)：

• [1]Zackay V F,Parker E R,Fahr D D,et al.The enhancement of ductility in high strength steels[J].Trans of ASM,1967,60(2):252-259.
• [2]Sankaran S,Subramanya S V,Kaushik V,et al.Thermomechanical processing and characterization of multi phase microstructures in a V bearingmedium carbon microalloyed steel[J].Journal of Materials Processing Technology,2003,139:642-647.
• [3]Jacques P J,Harlet P h,Girault E,et al.The developments of cold-rolled TRIP-assisted multiphase steels-low silicon TRIP-assisted multiphasesteels[J].ISIJ International,2001,41(9):1061-1067.
• [4]Srivastava A K,Bhattacharjee D,Jha G,et al.Microstructure and mechanical characterization of C-Mn-Al-Si cold-rolled TRIP-aided steel[J].Materials Science and Engineering A,2007,445-446:549-557.
• [5]Meyer M D,Vanderschueren D,Cooman B C D.The influence of the substitution of Si by Al on the properties of cold rolled C-Mn-Si TRIP steels[J].ISIJ International,1999,39(8):813-822.
• [6]Suh D W,Park S J,Oh C S,et al.Influence of partial replacement of Si by Al on the change of phase fraction during heat treatment of TRIP steels[J].Scripta Materialia,2007,57(12):1097-1100.
• [7]Cooman B C D.Structure-properties relationship in TRIP steels containing carbide-free bainite[J].Current Opinion in Solid State and MaterialsScience,2004,8(3):285-303.
• [8]孟延军,关昕.金属学及热处理[M].北京:冶金工业出版社,2008:146-147.
• [9]石霖.合金热力学[M].北京:机械工业出版社,1992:285-331.
• [10]俞德刚,王世道.贝氏体相变理论[M].上海:上海交通大学出版社,1998:202-266.
• [11]Wang J,Zwaag S.Stabilization mechanisms of retained austenite in transformation-induced plasticity steel[J].Metallurgical and MaterialsTransactions A,2001,32(6):1527-1539.
• [12]王世道,俞德刚.Fe-C合金贝氏体相变热力学研究[J].金属学报,1989,25(4):257-263.Wang Shi-dao,YU De-gang,Thermodynamic study of bainitic transformation in Fe-C alloys[J].Acta Metallurgica Sinica,1989,23(4):257-263.
• [13]于燕,刘相华,王华,等.汽车用高强度钢板强化机理研究[J].汽车工艺与材料,2006,7:12-16.YU Yan,LIU Xiang-hua,WANG Hua,et al.The strengthening mechanism research of automobile-used high strength steel[J].AutomobileTechnology and Material,2006,7:12-16.

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