Influence of Deformation and Coiling Temperature on Mechanical Properties of a High Strength Pipeline Steel

机译：变形和卷取温度对高强度管线钢力学性能的影响

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One of the components required to successfully produce high strength pipeline steel is to optimize precipitation strengthening. Some high strength pipeline grades rely on increased levels of Nb; in these grades, it is important to ensure that all the Nb is effectively employed. It is generally accepted that choice of coiling temperature is critical in maximizing the Nb precipitation in ferrite. Additional control of this precipitation may be attained by deformation at these coiling temperatures, an approach termed 'cool deformation'. In this work, steel specimens were heated to temperature of 1200℃ and held at temperature for 20 minutes to ensure significant dissolution of Nb precipitates. Some specimens were aged at 400℃ for times ranging from 10 minutes to 10 hours followed by air-cooling. Others were subjected to deformation at 400℃ ('cool deformation') prior to aging. It was found that the cool deformation improves the mechanical properties by microstructure; both yield and tensile strengths are significantly higher than that of the aged only specimens. By using low voltage imaging on a field emission gun scanning electron microscopy (FE-SEM), precipitates were observed and identified. The effects of the thermal and cool deformation schedules on the precipitate characteristics are described in this paper.

机译：成功生产高强度管线钢所需的组件之一是优化沉淀强化。一些高强度管道牌号依赖于增加的Nb含量。在这些等级中，重要的是要确保有效利用所有的铌。通常认为，盘绕温度的选择对于最大化铁素体中的Nb沉淀至关重要。可以通过在这些卷取温度下变形（称为“冷变形”的方法）来实现对该沉淀的其他控制。在这项工作中，将钢试样加热到1200℃，并在该温度下保持20分钟，以确保Nb沉淀物的显着溶解。一些试样在400℃下老化10分钟至10小时，然后进行空冷。其他的则在老化之前在400℃下变形（“冷变形”）。发现冷变形通过微观结构改善了机械性能。屈服强度和抗拉强度均显着高于仅老化的试样。通过在场发射枪扫描电子显微镜（FE-SEM）上使用低压成像，可以观察到并鉴定出沉淀物。本文描述了热变形和冷变形方案对沉淀物特性的影响。

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《International Conference on Microalloying for New Steel Processes and Applications; 20050907-09; Basque Country(ES)》|2005年|P.597-604|共8页
会议地点 Basque Country(ES)
作者
A.M. Elwazri; D. Bai; F. Siciliano; S. Yue;
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作者单位

Department of Metals and Materials Engineering, McGill University 3610 University St., Montreal, Quebec, Canada, H3A 2B2;

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原文格式 PDF
正文语种 eng
中图分类冶炼方法;
关键词
cool deformation; Nb precipitates; ferrite matrix; coiling temperature; mechanical properties; shear punch; FE-SEM;

机译：冷变形; Nb析出物;铁素体基体;卷取温度;力学性能;剪切冲头; FE-SEM;

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1. Investigation of the Deformation Degree Influence on the Mechanical Properties of the High-Strength Steel in the Process of Presetting for Combined Strengthening [J] . Kurits E.A., Lubchenko A.P. Металлофизика и новейшие технологии: Науч.-теорет. журн. . 2000,第8期

机译：复合强化预设定形变对高强度钢力学性能影响的研究
2. Effect of cool deformation on mechanical properties of a high-strength pipeline steel [J] . A. M. Elwazri, R. Varano, S. Yue, Metallurgical and Materials Transactions A . 2005,第11期

机译：冷变形对高强度管线钢力学性能的影响
3. Effect of Cool Deformation on Mechanical Properties of a High-Strength Pipeline Steel [J] . A.M. Elwazri, R. Varano, F. Siciliano Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science . 2005,第11期

机译：冷变形对高强度管线钢力学性能的影响
4. Influence of Deformation and Coiling Temperature on Mechanical Properties of a High Strength Pipeline Steel [C] . A.M. Elwazri, D. Bai, F. Siciliano, International Conference on Microalloying for New Steel Processes and Applications . 2005

机译：变形和卷积温度对高强度管线钢力学性能的影响
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机译：γ和（γ+α）区域的热塑性变形对高强度低合金（HSLA）钢的组织和力学性能的影响
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。

Influence of Deformation and Coiling Temperature on Mechanical Properties of a High Strength Pipeline Steel

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