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铌钒微合金化高强度船板钢的连续冷却转变规律 预览 被引量:11

Continuous cooling transformation of Nb-V-microalloyed high-strength hull steel
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摘要 利用相变仪和热模拟试验机模拟现场生产工艺条件测定了一种铌钒微合金化高强度船板钢的静态和经三种终轧温度变形后的动态连续冷却转变(CCT)曲线。结果表明:同静态CCT曲线比较,实验钢的动态CCT曲线整体向左上方移动。随冷却速度的增大,实验钢的γ/α相变开始温度逐渐降低;贝氏体相变开始温度Bs先升高到一个平台,随冷却速度的进一步增加又降低;铁素体晶粒细化。终轧温度自900降至800℃,动态CCT曲线的γ/α相变开始温度及贝氏体上临界冷却速度轻微增加,Bs下降10℃左右,晶粒细化。 A thermo-simulating machine and a dilatometer were used to test the continuous cooling transformation (CCT) diagrams of a kind of Nb-V-microalloyed high-strength hull steel, including the dynamic (with deformation at three temperatures) and the static (without deformation) CCT diagrams, Experimental results show that the dynamic CCT diagrams shift to the left and upper compared with the static ones. With increasing cooling rate the onset temperature of γ/α transformation is gradually lowered, the starting temperature of bainitic transformation Bs increases to a plateau and then decreases, and the ferrite grains are dramatically refined. When the finish rolling temperature reduces from 900 ℃ to 800 ℃, the onset temperature of γ/α transformation and the upper critical cooling rate for bainite slightly increase while Bs decreases about 10 ℃, and the ferrite grains are refined.
作者 肖国华 王福明 李长荣 肖寄光 XIAO Guohua , WANG Fuming , LI Changrong , XIAO Jiguang 1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 2) School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
出处 《北京科技大学学报》 EI CAS CSCD 北大核心 2008年第5期 495-500,共6页 Journal of University of Science and Technology Beijing
基金 国家自然科学基金资助项目(No.50574010 No.50731002)
关键词 船板钢 连续冷却转变曲线 铌钒微合金化 控轧控冷 hull steel continuous cooling transformation (CCT) diagram Nb-V-microalloyed controlled rolling and controlledcooling
作者简介 肖国华(1974-),男,博士研究生,E—mail:xiaoguohua009@gmail.com 王福明(1963-),男,教授,博士生导师
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参考文献14

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二级参考文献2

  • 1Choo W Y 高怀(译).再结晶控制轧制生产船体用Ti、Nb结构钢的发展.高洁净度超细晶微合金化高强高韧钢文集1[M].北京:冶金部钢铁研究总院,1998.60-62. 被引量:1
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