童明伟,袁泽喜,张开广,范巍

• 1:武汉科技大学材料与冶金学院
• 2:武汉钢铁(集团)公司研究院

摘要(Abstract)：

利用力学性能测试、光学显微镜、透射电镜观察等方法,阐明了回火热处理对低屈强比高强度钢组织与力学性能的影响规律。研究表明,回火温度对低屈强比高强度钢的组织和力学性能具有决定性影响。回火前,试验钢显微组织主要由细小板条状和粒状贝氏体组成,还含有少量铁素体及一些M/A岛。随回火温度提升,板条贝氏体逐渐合并长大,板条宽度增加,M/A岛分解,抗拉强度和冲击韧性下降,而屈服强度保持稳定,导致屈强比升高。M/A岛以块状和链条状形态存在,位于板条之间或贝氏体/铁素体边界。较低的回火温度可获得高强度、高韧性和低屈强比钢,这主要归功于其细小的板条组织和稳定的M/A岛。

关键词(KeyWords)： 高强钢;低屈强比;回火热处理;组织与性能

Abstract:

Keywords:

基金项目(Foundation): 国家“十二五”科技支撑计划项目(2012BAJ13B01)

作者(Author): 童明伟,袁泽喜,张开广,范巍

DOI: 10.13289/j.issn.1009-6264.2015.05.023

参考文献(References)：

• [1]Barsom J M.High performance steels and their use in structures[C]//Proceedings of the International Symposium on High Performance Steels for Structural Applications.Cleveland,Ohio,1995:3-11.
• [2]Das S,Ghosh A.The effect of cooling rate on structure and properties of a HSLA forging[J].Scripta Materialia,2003,48(1):51-57.
• [3]Decooman B C.Structure-properties relationship in TRIP steels containing carbide-free bainite[J].Current Opinion in Solid State and Material Science,2004,8(3):285-303.
• [4]Tang Z H,Stumpf W.The effect of microstructure and processing variables on the yield to ultimate tensile strength ratio in a Nb-Ti and a Nb-Ti-Mo line pipe steel[J].Material Science and Engineering A,2008,490:391-402.
• [5]Li Z,Wu D.Study of the high strength and low yield ratio cold forging steel[J].Material Science and Engineering A,2007,452/453:142-148.
• [6]Yang D Z,Sun X W,Lei T C.Effect of intercritical quenching on microstructure and tensile properties of steels 15 and 15Mn2Nb[J].Journal of Material Science,1983,18(9):2727-2731.
• [7]Kim N J,Thomas G.Effects of the constituents on the mechanical behavior of low carbon steels[J].Scripta Metallurgica,1984,18(8):817-820.
• [8]Shikanai N,Kagawa H,Kurihara K.Influence of microstructure on yielding behavior of heavy gauge high strength steel plates[J].ISIJ International,1992,32(3):335-342.
• [9]Kim C.Modeling tensile deformation of dual-phase steel[J].Metallurgical and Materials Transanction A,1988,19(5):1263-1268.
• [10]Kim Y M,Kim S K,Lim Y J,et al.Effect of microstructure on the yield ratio and low temperature toughness of linepipe steels[J].ISIJ International,2002,42(12):1571-1577.
• [11]Hayashi K,Nagao A,Matsuda Y.550 and 610 MPa class high-strength steel plates with excellent toughness for tanks and penstocks produced using carbide morphology controlling technology[J].JFE Technical Report,2008(11):19-25.
• [12]Nagao A,Ito T,Obinata T.Development of YP 960 and 1100 MPa class ultra high strength steel plates with excellent toughness and high resistance to delayed fracture for construction and industrial machinery[J].JFE Technical Report,2008,11(11):13-18.
• [13]Pontremoli M,Bufalini P,Aprile A,et al.Development of grade API X80 pipeline steel plates produced by controlled rolling[J].Metals Technology,1984,11(11):504-514.
• [14]杨浩,杨汉,曲锦波.热处理工艺对690 MPa级低屈强比高强钢组织性能的影响[J].材料热处理学报,2013,34(5):137-142.YANG Hao,YANG Han,QU Jin-bo.Effect of heat treatment on microstructure and mechanical properties of a 690 MPa grade high strength steel with low yield ratio[J].Transactions of Materials and Heat Treatment,2013,34(5):137-142.
• [15]康永林,陈庆军,王可鲁,等.700 MPa级低碳贝氏体钢的热处理工艺研究[J].材料热处理学报,2005,26(3):96-99.KANG Yong-lin,CHEN Qing-jun,WANG Ke-lu,et al.Study on heat treatment process of the 700MPa grade low carbon bainitic steel[J].Transactions of Materials and Heat Treatment,2005,26(3):96-99.
• [16]Remesh C Sharma.Principles of Heat Treatment of Steel[M].New Age International,1996:187-188.
• [17]You Y,Shang C J,Chen L,et al.Investigation on the crystallography of the transformation products of reverted austenite in intercritically reheated coarse grained heat affected zone[J].Materials&Design,2013,43:485-491.
• [18]Kim B C,Lee S,Kim N J,et al.Microstructure and local brittle zone phenomena in high-strength low-alloy steel welds[J].Metallurgical Transaction A,1991,22(1):139-149.
• [19]Lee S,Kim B C,Kwon D.Correlation of microstructure and fracture properties in weld heat-affected zones of thermomechanically controlled processed steels[J].Metallurgical and Materials Transaction A,1992,23(10):2803-2816.
• [20]Zhou Q,Qian L H,Tan J,et al.Inconsistent effects of mechanical stability of retained austenite on ductility and toughness of transformation-induced plasticity steels[J].Material Science and Engineering A,2013,578:370-376.

文章评论(Comment)：