| 两阶段控制冷却工艺对含钼X80抗大变形管线钢组织与性能的影响 |
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| 引用本文： | 孟德亮,康永林,郑晓飞,安守勇,夏佃秀.两阶段控制冷却工艺对含钼X80抗大变形管线钢组织与性能的影响[J].北京科技大学学报,2011(7):834-840. |
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| 作者姓名： | 孟德亮 康永林 郑晓飞 安守勇 夏佃秀 |
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| 作者单位： | 北京科技大学材料科学与工程学院;济南钢铁集团总公司技术中心; |
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| 基金项目： | 国家高技术研究发展计划资助项目(No.2009AA03Z518) |
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| 摘 要： | 采用TMCP热轧及轧后两阶段控制冷却技术,在试验室制备了含Mo成分的X80级抗大变形管线钢,并利用扫描电镜和透射电镜等分析方法研究了不同冷却条件对组织与性能的影响.结果表明,采用两阶段控制冷却工艺的含Mo成分X80抗大变形管线钢为铁素体-贝氏体双相组织;随加速冷却中开冷温度降低,组织中铁素体含量增加,试样强度降低,屈强比降低,均匀伸长率提高;随加速冷却中终冷温度降低,贝氏体中M/A含量减少,尺寸更细小,分布更分散,试样强度变化不大但均匀伸长率显著提升.分析表明,当铁素体含量一定时,均匀伸长率与贝氏体中M/A密切相关,细小且均匀分布的M/A可提高加工硬化速率,推迟颈缩发生,使均匀伸长率升高.当加速冷却中开冷温度为690℃、终冷温度为450℃时,组织中铁素体的体积分数约为23%、晶粒尺寸约为5μm,M/A岛尺寸约为1μm,组织均匀性良好,试样得到最优的强度塑性匹配.
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| 关 键 词： | 管线钢 钼 控制冷却 微观组织 力学性能 |
Effect of two-stage controlled cooling on the microstructure and properties of Mo-containing X80 high-deformability pipeline steel |
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| MENG De-liang,KANG Yong-lin,ZHENG Xiao-fei,AN Shou-yong,XIA Dian-xiu School of Materials Science , Engineering,University of Science , Technology Beijing,Beijing ,China Technology Center,Jinan Iron & Steel Co.Ltd.,Jinan ,China.Effect of two-stage controlled cooling on the microstructure and properties of Mo-containing X80 high-deformability pipeline steel[J].Journal of University of Science and Technology Beijing,2011(7):834-840. |
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| Authors: | MENG De-liang KANG Yong-lin ZHENG Xiao-fei AN Shou-yong XIA Dian-xiu School of Materials Science Engineering University of Science Technology Beijing Beijing China Technology Center Jinan Iron & Steel CoLtd Jinan China |
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| Institution: | MENG De-liang1),KANG Yong-lin1),ZHENG Xiao-fei1),AN Shou-yong2),XIA Dian-xiu2) 1) School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China 2) Technology Center,Jinan Iron & Steel Co.Ltd.,Jinan 250101,China |
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| Abstract: | A Mo-containing X80 high-deformability pipeline steel was processed by TMCP rolling and two-stage controlled cooling in laboratory.The effects of cooling conditions on the microstructure and properties of the steel were investigated by scanning electron microscopy(SEM) and transmission electron microscopy(TEM).It is found that the microstructure of the steel processed by two-stage controlled cooling is ferrite-bainite dual phase.As the start temperature in accelerated cooling comes down,both the strength an... |
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| Keywords: | pipeline steel molybdenum controlled cooling microstructure mechanical properties |
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