李红宇,韩军,邢健,薛晶晶,刘倚天,韩吉庆

• 1:西安诺博尔稀贵金属材料有限公司

摘要(Abstract)：

利用万能拉伸试验机、光学显微镜(OM)和扫描电镜(SEM)研究了变形速率对核电用304L不锈钢管材室温拉伸性能、真应力-应变曲线、加工硬化指数和断口形貌的影响。结果表明:随着变形速率的降低,管材抗拉强度略增,屈服强度略降,断后伸长率大幅提高,管材屈强比降低,韧性增强,加工硬化指数增加。不同变形速率下管材的断裂均为微孔聚集型韧性断裂,低变形速率下管材断口均匀分布着等轴韧窝,管材整体塑性变形充分且分布均匀,材料塑性变形能力强,利于管材的加工成型。

关键词(KeyWords)： 304L不锈钢管;变形速率;力学性能;加工硬化指数;断口形貌

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 李红宇,韩军,邢健,薛晶晶,刘倚天,韩吉庆

DOI: 10.13289/j.issn.1009-6264.2017-0301

参考文献(References)：

• [1]刘建章.核结构材料[M].北京:化工工业出版社,2007.
• [2]韩飞.304奥氏体不锈钢冷加工硬化及退火软化的研究[D].长沙:中南大学,2004.HAN Fei.Study on the cold working hardening and annealing softening behaviors of 304 austenitic stainless steel[D].Chang Sha:Central South University,2004.
• [3]Llewellyn D T.Work hardening effects in austenitic stainless steels[J].Material Science and Technology,1997,13:389-400.
• [4]王松涛,杨柯,单以银,等.冷变形对高氮奥氏体不锈钢组织与力学行为的影响[J].金属学报,2007,43(7):713-718.WANG Song-tao,YANG Ke,SHAN Yi-yin et al.Effect of cold deformation on microstructure mechanical behavior of high nitrogen austenitic stainless steel[J].Acta Metallurgica Sinica,2007,43(7):713-718.
• [5]郑津洋,郭阿宾,缪存坚,等.奥氏体不锈钢深冷容器室温应变强化技术[J].压力容器,2010,27(8):28-32.ZHENG Jin-yang,GUO A-bin,MIAO Cun-jian,et al.Cold stretching technique for austenitic stainless steel cryogenic pressure vessels[J].Pressure Vessel Technology,2010,27(8):28-32.
• [6]Lee Woei-Shyan,Chi-Feng Lin,Tsung-Ju Liu.Strain rate dependence of impact properties of sintered 316L stainless steel[J].Journal of Nuclear Materials,2006,359(3):247-257.
• [7]Chen J Y,Sia Nemat-Nasser.A model for experimentally-observed high-strain-rate dynamic strain aging in titanium[J].Acta Mater,2000,48:3131-3144.
• [8]石德珂,杨桂应.1Crl8Ni9Ti不锈钢钢的变形[J].金属热处理学报,1992,13(1):35-39.SHI De-ke,YANG Gui-ying.Deformation characteristics of austenitic stainless steel 1Crl8Ni 9Ti[J].Transactions of Metal Heat Treatment,1992,13(1):35-39.
• [9]Sato K,Hirotsu Y,Ichinose M,et al.Effect of deformation induced phase transformation and twinning on the mechanical properties of austenitic Fe-Mn-Al Alloys[J].Trans ISIJ,1989,29:868-875.
• [10]Choi Jom-Yong,Won Jin.Strain induced martensite formation and its effect on strain hardening behavior in the cold drawn 304austenitic stainless steels[J].Script Materialia,1997(36):99-104.
• [11]刘伟,李志斌,王翔,等.应变速率对奥氏体不锈钢应变诱发α'马氏体转变和力学行为的影响[J].金属学报2009,45(3):285-291.LIU Wei,LI Zhi-bin,WANG Xiang,et al.Effect of strain rate on strain inducedα'-martensite transformation and mechanical response of austenitic stainless steels[J].Acta Metallurgica Sinica.2009,45(3):285-291.
• [12]Milad M,Zreiba N,Elhalouani F,et al.The effect of cold work on structure and properties of AISI 304 stainless steel[J].Journal of Materials Processing Technology,2008,203(1):80-85.
• [13]常东华,周晓,魏佰友.应变硬化指数n值的测定和应用[J].理化检验-物理分册,2006,42(5):242-244.CHANG Dong-hua,ZHOU Xiao,WEI Bai-you.Measurement and application of tensile strain hardening exponent-values[J].PTCA(Part A:Phys Test),2006,42(5):242-244.
• [14]钟群鹏,赵子华.断口学[M].北京:高等教育出版社,2005:140-155.
• [15]范光伟,王桂平,李志斌.0Cr18Ni9不锈钢中非金属夹杂来源分析[J].北京科技大学学报,2007,29(8):776-780.FAN Guang-wei,WANG Gui-ping,LI Zhi-bin.Origin of non-metallic inclusion in stainless steel[J].Journal of University of Science and Technology Beijing,2007,29(8):776-780.

文章评论(Comment)：