Q690MPa海洋平台用钢形变奥氏体的静态再结晶
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摘要
采用双道次热压缩法探究Q690 MPa级别海洋平台用钢形变奥氏体的静态再结晶行为。采用Gleeble-3500热模拟机,分析了变形量、变形速率和变形温度因素对静态再结晶的影响。结果表明:随着变形量、变形速率和变形温度的增加,静态再结晶体积分数基本也随之增加,这与材料的位错密度和位错增殖速度直接相关。同时,建立了该钢的静态再结晶动力学模型,静态再结晶激活能为339.44 kJ/mol。
The double pass hot compression method was adopted to investigate the static recrystallization behavior of deformed austenite of Q690 MPa grade steel for offshore platform. The Gleeble 3500 thermal/mechanical simulator was used to analyze the effect of deformation, deformation rate and deformation temperature on the static recrystallization. The results show that the volume fraction of static recrystallization basically increases with the increase of deformation, deformation rate and deformation temperature, which is directly related to the dislocation density and the rate of dislocation growth. At the same time, the static recrystallization kinetic model of the steel is established, and then, the static recrystallization activation energy is 339.44 kJ/mol.
The double pass hot compression method was adopted to investigate the static recrystallization behavior of deformed austenite of Q690 MPa grade steel for offshore platform. The Gleeble 3500 thermal/mechanical simulator was used to analyze the effect of deformation, deformation rate and deformation temperature on the static recrystallization. The results show that the volume fraction of static recrystallization basically increases with the increase of deformation, deformation rate and deformation temperature, which is directly related to the dislocation density and the rate of dislocation growth. At the same time, the static recrystallization kinetic model of the steel is established, and then, the static recrystallization activation energy is 339.44 kJ/mol.
引文
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[2]陈庆军,康永林,孙浩,等.X70管线钢热变形奥氏体的静态再结晶行为[J].北京科技大学学报,2007,29(12):1212-1215.
[3]柳东徽,赵亚娟.热变形奥氏体静态再结晶规律的研究[J].现代冶金,2015(1):9-11.
[4]Kobayashi R.Modeling and numerical simulations of dendritic crystal growth[J].Physica D:Nonlinear Phenomena,1993,63(3/4):410-423.
[5]张杰,蔡庆伍,武会宾,等.E690海洋平台用钢力学性能和海洋大气腐蚀行为[J].北京科技大学学报,2012,34(6):657-665.
[6]吴辉,赵燕青,李闯,等.690MPa级海洋平台用钢的组织和性能[J].金属热处理,2010,35(9):20-25.
[7]刘年富,何矿年,李桦,等.E36级海洋平台用钢的试制[J].钢铁,2011,46(5):97-100.
[8]狄国标,刘振宇,刘相华,等.低碳海洋平台用钢E40-Z35的研制[J].东北大学学报(自然科学版),2009,30(11):1582-1585.
[9]黄维,高真凤,何立波.海洋平台用钢板品种发展及研发概况[J].上海金属,2013,35(4):53-58.
[10]赵宝纯,赵坦,李桂艳,等.一种钒氮微合金钢的静态再结晶行为[J].钢铁研究学报,2013,21(1):54-58.
[11]李立新,雷浩,方燕子,等.DC03钢静态再结晶模型的研究[J].钢铁钒钛,2013,34(2):98-102.
[12]吕良星.金属组织转变与变形的相场与晶体塑性模拟及其耦合模型[D].哈尔滨:哈尔滨工业大学,2011.
[13]Siciliano F,Jonas J J.Mathematical modeling of the hot strip rolling of microalloyed Nb,multiply-alloyed Cr-Mo,and plain C-Mn steels[J].Metallurgical&Materials Transactions A,2000,31(2):511-530.