陈英伟,吴晓春,宋雯雯,闵永安

• 1:上海大学材料科学与工程学院

摘要(Abstract)：

利用透射电镜观察、能谱分析以及三维原子探针分析微观原子分布等方法,结合热稳定性实验数据,对含铌热作模具钢SDH8Nb中碳化物的形态、大小及其变化情况和对材料热稳定性能的影响进行了研究。结果表明:SDH8Nb钢的热稳定性明显优于传统的H13钢。淬回火后,在SDH8Nb钢中,主要碳化物为垂直态的长棒状Mo2C型碳化物,以及少量的Cr和V的碳化物,而Nb元素在淬回火后固溶到基体中,经过长时间保温后,以NbC的形式析出,提高了材料的抗回火软化能力。

关键词(KeyWords)： 热稳定性;析出;碳化物演变;铌钢

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑计划课题(2007BAE51B04)

作者(Author): 陈英伟,吴晓春,宋雯雯,闵永安

DOI: 10.13289/j.issn.1009-6264.2010.05.027

参考文献(References)：

• [1]杜志伟,刘宗昌,朱文方,等.H13钢淬火、回火过程中相变的研究[J].包头钢铁学院学报,2001,20(1):34-36.DU Zhi-wei,LIU Zong-chang,ZHU Wen-fang et al.Study on the phase transformation of H13 steel during quenching and tempering[J].Journal ofBaotou University of Iron and Steel Technology,2001,20(1):34-36.
• [2]Unterweiser P M,Boyer H E,Kubbs J J.Heat treater's guide standard practices and procedures for steel[M].ASM,Metals Park,Ohio,USA,44073,1982:493.
• [3]Elias C N,Da Costa Viana C S.Effect of ausforming on microstructure and hardness of AISI H13 steel modified with niobium[J].Materials Scienceand Technology,1992,8:785-789.
• [4]Tsujii N,Abe G,Fukura K,Sunada H.Effect of testing atmosphere on low cycle fatigue of hot work tool steel at elevated temperature[J].Journal ofMaterials Science Letters,1996,15:1251-1254.
• [5]Delagnes D,Lamesle P,Mathon M H,et al.Influence of silicon content on the precipitation of secondary carbides and fatigue properties of a 5%Crtempered martensitic steel[J].Materials Science and Engineering A,2005,394:435-444.
• [6]李平安,高军.热作模具钢的热稳定性研究[J].金属热处理,1997,22(12):10-12.LI Ping-an,GAO Jun.Study on heat stability of hot die steels[J].Heat Treatment of Metals,1997,22(12):10-12.
• [7]崔忠圻,刘北兴.金属学与热处理原理[M].哈尔滨:哈尔滨工业大学出版社,1998:70-72.
• [8]张树松,仝爱莲.钢的强韧化机理与技术途径[M].北京:兵器工业出版社,1995.
• [9]Michael Bischof,Peter Staron,Devrim Caliskanoglu.On the overaging behaviour of tool steel X38CrMoV5-3[J].Materials Science and EngineeringA,2008,472:148-156.
• [10]宋延沛,王爱琴,王文焱,等.RE-Nb对铸造3Cr2MoNiWV热锻模具钢组织和力学性能的影响[J].钢铁研究学报,2006(2):37-40.SONG Yan-pei,WANG Ai-qin,WANG Wen-yan,et al.Effects of RE-Nb on microstructure and mechanical properties of cast 3Cr2MoNiWV hot-workdie steel[J].Journal of Iron and Steel Research,2006(2):37-40.

文章评论(Comment)：