| 空冷弛豫对X70级抗大变形管线钢组织性能的影响 |
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| 引用本文： | 焦多田,蔡庆伍,武会宾,冉旭,任毅.空冷弛豫对X70级抗大变形管线钢组织性能的影响[J].材料热处理学报,2009,30(5). |
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| 作者姓名： | 焦多田 蔡庆伍 武会宾 冉旭 任毅 |
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| 作者单位： | 1. 北京科技大学高效轧制国家工程研究中心,北京,100083
2. 鞍钢技术中心,辽宁,鞍山,114001 |
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| 基金项目： | 国家“十一五”科技支撑计划(2006BAE03A06) |
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| 摘 要： | 用显微组织分析,力学性能检测以及SUPPA55场发射扫描电镜,研究轧后空冷弛豫对X70级抗大变形管线钢综合性能的影响。结果表明,在相同的轧制工艺下,试验钢随着空冷弛豫时间延长,入水温度降低,先共析铁素体的量和析出物的量都逐渐增多,前者的软化效果与后者的析出强化共同作用,使强度和塑性变化复杂化。试验钢存在最佳的一个入水温度区间,获得先共析铁素体+贝氏体的双相组织,两者呈层状交叠分布,在软化和强化效果的综合作用下得到了抗大变形管线钢X70级所要求的强度塑性最佳匹配。
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| 关 键 词： | X70级管线钢 弛豫时间 双相组织 抗大变形 |
Influence of air-cooling relaxation on microstructure and properties of X70 pipeline steel with high deformation resistance |
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| JIAO Duo-tian,CAI Qing,WU Hui-bin,RAN Xu,REN Yi.Influence of air-cooling relaxation on microstructure and properties of X70 pipeline steel with high deformation resistance[J].Transactions of Materials and Heat Treatment,2009,30(5). |
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| Authors: | JIAO Duo-tian CAI Qing WU Hui-bin RAN Xu REN Yi |
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| Affiliation: | 1.National Engineering Research Center for Advanced Rolling Technology;University of Science and Technology Beijing;Beijing 100083;China;2.Technical Center of Anshan Iron and Steel Co Ltd;Anshan 114001;China |
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| Abstract: | The microstructure and mechanical properties of X70 pipeline steel with different air-cooling relaxation time after rolling was studied by using a SUPPA55 field emission scanning electron microscope and tensile testing.It is found that with extension of relaxation time,the water-entry temperature reduces,the quantity of proeutectoid ferrite and precipitation increases,the change of strength and plasticity becomes complex because of the combination of softening effect by the former and precipitation strength... |
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| Keywords: | X70 relaxation time dual phase microstructure high deformation resistance |
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