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首页> 外文期刊>JFE technical report >Development Of Api X80 Grade Electric Resistance Welding Line Pipe With Excellent Low Temperature Toughness
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Development Of Api X80 Grade Electric Resistance Welding Line Pipe With Excellent Low Temperature Toughness

机译：优异的低温韧性Api X80级电阻焊管线管的研制

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摘要

This paper introduces nature and characteristics of the X80 electric resistance welding (ERW) line pipe. Thick-walled high strength line pipes are to be increasingly used for high pressure pipeline operation to improve the transport efficiency for natural gas and oil. To improve the material properites of hot coil for X80, the effects of microstructure, chemical composition on strength and toughness were investigated. Based on the result, JFE Steel has developed ultra low carbon bainitic ferrite steel with fine precipitates and no coarse pearlite or martensite by applying JFE Steel s thermomechanical controlled process (TMCP) technologies. Good balance of material properties of base material and seam weld suitable for low temperature use was obtained.
机译：本文介绍了X80电阻焊（ERW）管线管的性质和特点。厚壁高强度管线管将越来越多地用于高压管线操作，以提高天然气和石油的输送效率。为了提高X80热轧卷的材料性能，研究了显微组织，化学成分对强度和韧性的影响。基于此结果，JFE Steel通过应用JFE Steel的热机械控制工艺（TMCP）技术开发了具有细小析出物且没有粗大珠光体或马氏体的超低碳贝氏体铁素体钢。获得了适合低温使用的基础材料和缝焊的材料性能的良好平衡。

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