蓝慧芳,杜林秀,李卓,刘彦春,刘相华

• 1:东北大学轧制技术及连轧自动化国家重点实验室
• 2:酒泉钢铁公司钢研院新产品开发研究所

摘要(Abstract)：

通过两阶段控制轧制加快速冷却,综合利用细晶强化、相变强化和析出强化等强化机制获得了满足了国标GB/T 16270-1996中Q550和Q620要求的高强度钢板。通过光学显微镜、扫描电镜和背散射衍射手段研究了终冷温度及终轧温度对力学性能的影响。结果表明,随终冷温度降低,屈服强度、抗拉强度和屈强比升高;终轧温度高不利于组织的细化,导致强度和韧性降低;随终冷温度升高,M-A岛的尺寸增大,体积分数增多,不利于韧性和塑性的提高。

关键词(KeyWords)： 控轧控冷;高强度钢;组织细化;强韧化机制

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑计划项目(2006BAE03A08)

作者(Author): 蓝慧芳,杜林秀,李卓,刘彦春,刘相华

参考文献(References)：

• [1]王国栋,刘相华,吴迪.节约型钢铁材料及其减量化加工制造[J].轧钢,2006,23(2):1-5.
• [2]Jahazi M,Egbali B.The influence of hot rolling parameters on the microstructure and mechanical properties of an ultra-high strength steel[J].Journal ofMaterials Processing Technology,2000,103(2):276-279.
• [3]Adem Bakkaloglu.Effect of processing parameters on the microstructure and properties of an Nb microalloyed steel[J].Materails Letters,2002,56(3):263-272.
• [4]Bhadeshia H K D H.Bainite in steels-transformations,microstructure and properties[M].Second Edition.The Institute of Materials,2001.
• [5]XIAO Fu-ren,LIAO Bo,SHAN Yi-yin,et al.Challenge of mechanical properties of an acicular ferrite pipeline steel[J].Materials Science and EngineeringA,2006,431(1-2):41-52.
• [6]孔君华,吴力新,谢长生.热轧工艺对低碳微合金钢组织与性能的影响[J].热加工工艺,2004,11:43-45.
• [7]Young Min Kim,Hakcheol Lee,Nack J Kim.Transformation behavior and microstructural characteristics of acicular ferrite in linepipe steels[J].MaterialsScience and Engineering A,2008,478(1-2):361-370.
• [8]赵明纯,单以银,曲锦波,等.控轧控冷工艺对X60管线钢组织及力学性能的影响[J].金属学报,2001,37(2):179-183.
• [9]田村今男.高强度低合金钢的控制轧制与控制冷却[M].王国栋,等,译.北京:冶金工业出版社,1992.
• [10]康永林,于浩,王克鲁,等.CSP低碳钢薄板组织演变及强化机理研究[J].钢铁,2003,38(8):20-26.
• [11]Terry Gladman,David Dulieu,Ian D Mcivor.Structure-property relationships in high-strength microalloyed steels[A].Microalloying 75,Proceedings of anInternational Symposiumon High-strength,Low-alloy Steels[C].New York:Union Ccarbide Corporation,1977:32-55.
• [12]TANG Zheng-hua,Stumpf Waldo.The role of molybdenum additions and prior deformation on acicular ferrite formation in microalloyed Nb-Ti low-carbon line-pipe steels[J].Materials Characterization,2008,59(6):717-728.

文章评论(Comment)：