李娜,刘国权,康人木,杨云,余慧

• 1:北京科技大学材料科学与工程学院
• 2:江苏省南通建工集团股份有限公司
• 3:北京科技大学新金属材料国家重点实验室
• 4:四川省川威集团有限公司

摘要(Abstract)：

设计和研究了一种新型高铝(1.8%Al)淬火-碳分配-回火(Q-P-T)高强钢。基于JMatPro 6.0软件和约束条件碳平衡热力学(Constrained Carbon Equilibrium,CCE)模型的模拟计算结果,制定了该钢的热处理工艺,进行了盐浴热处理和力学性能实验,并通过SEM和TEM对实验钢的组织进行了观察与分析。结果表明:Q-P-T实验钢的组织主要由板条马氏体、一定数量的富碳残留奥氏体和弥散分布的碳化物组成,其中马氏体和弥散的碳化物主要提供强化,残留奥氏体则主要起到提高塑性的作用。实验钢经Q-P-T处理后获得了高抗拉强度(1260 MPa)和塑性(18%)的良好匹配且其热处理工艺容易控制,验证了高铝钢采用Q-P-T热处理的可行性。

关键词(KeyWords)： 高铝Q-P-T钢;高强度低合金钢;热处理工艺;强韧化;残留奥氏体

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51071019);; 国家高级技术研究发展计划项目(863计划)(2013AA031301)

作者(Author): 李娜,刘国权,康人木,杨云,余慧

DOI: 10.13289/j.issn.1009-6264.2013.03.023

参考文献(References)：

• [1]Speer J G,Rizzo F C,Matlock D K,et al.The“quenching and partitioning”process:Background and recent progress[J].Materials Research,2005,8(4):417-423.
• [2]Edmonds D V,Rizzo F C,De Cooman B C,et al.Quenching and partitioning martensite-A novel steel heat treatment[J].Mater Sci Eng A,2006,438-440:25-34.
• [3]徐祖耀.钢热处理的新工艺[J].热处理,2007,22(1):1-10.Hsu T Y(Xu Zuyao).New processes for steel heat treatment[J].Heat Treatment,2007,22(1):1-10.
• [4]徐祖耀.淬火-碳分配-回火(Q-P-T)工艺浅介[J].金属热处理,2009,34(6):1-8.Hsu T Y(Xu Zuyao).A brief introduction to quenching-partitioning-tempering(Q-P-T)process[J].Heat Treatment of Metals,2009,34(6):1-8.
• [5]Hsu T Y(Xu Zuyao).Design of structure,composition and heat treatment process for high strength steel[J].Mater Sci Forum,2007,561-565:2283-2286.
• [6]胡浙梁,王晓东,王利,等.新型Q-P-T钢性能及其微观组织[J].材料热处理学报,2010,31(4):76-80.HU Zhe-liang,WANG Xiao-dong,WANG Li,et al.Property and microstructure of a novel Q-P-T steel[J].Transactions of Materials and HeatTreatment,2010,31(4):76-80.
• [7]De Meyer M,Vanderschueren D,De Cooman B C.Influence of the substitution of Si by Al on the properties of coll rolled C-Mn-Si TRIP steels[J].ISIJ Int,1999,39(8):813-824.
• [8]李华瑞.材料X射线衍射分析实用方法[M].北京:冶金工业出版社,1994.
• [9]Speer J G,Edmonds D V,Rizzo F C,et al.Partitioning of carbon from supersaturated plates of ferrite,with application to steel processing andfundamentals of the bainite transformation[J].Current Opinion in Solid State and Materials Science,2004(8):219-237.
• [10]Speer J G,Matlock D K,De Cooman B C,et al.Comments on“On the definitions of paraequilibrium and orthoequilibrium”by M Hillert and J Agren[J].Scripta Mater,2004,50:697-699.
• [11]Clarke A J,Speer J G,Miller M K,et al.Carbon partitioning to austenite from martensite or bainite during the quench and partition(Q&P)process:A critical assessment[J].Acta Materialia,2008,56(1):16-22.
• [12]Wang X D,Huang B X,Wang L,et al.Microstructure and mechanical properties of microalloyed high-strength transformation-induced plasticity steels[J].Metall Mater Trans A,2008,39(1):1-7.
• [13]Zhong N,Wang X D,Wang L,et al.Enhancement of the mechanical properties of a Nb-microalloyed advanced high-strength steel treated byquenching-partitioning-tempering process[J].Mater Sci Eng A,2009,506:111-116.
• [14]Bailey J E,Hirsch P B.The dislocation distribution,flow stress,and stored energy in cold-worked polycrystalline silver[J].Philosophical Magazine,1960,5(53):485-497.
• [15]Miyata K,Kushida T,Omura T,et al.Coarsening kinetics of multicomponent MC-type carbides in high-strength low-alloy steels[J].Metall MaterTrans A,2003,34:1565-1573.

文章评论(Comment)：