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首页> 外文会议>International Conference on Offshore Mechanics and Arctic Engineering 2007(OMAE2007) vol.4; 20070610-15; San Deigo,CA(US) >METALLURGICAL DESIGN OF NEWLY DEVELOPED MATERIAL FOR SEAMLESS PIPES OF X80-X 100 GRADES
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METALLURGICAL DESIGN OF NEWLY DEVELOPED MATERIAL FOR SEAMLESS PIPES OF X80-X 100 GRADES

机译：X80-X 100级无缝管新开发材料的冶金设计

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摘要

With the increasing development of oil and gas fields in deepwater or ultra-deepwater with deep well depth, the development of high strength seamless pipe has become necessary. This paper describes a metallurgical design of seamless pipe with high strength reaching X80-X100 grade (minimum yield strength, 552 Mpa - 689 Mpa) manufactured by steel containing very low carbon and with a microstructure of uniform bainite. The effect of microstructure of quenched and tempered (QT) steel on strength and toughness is investigated in laboratory. Uniform bainitic structure without coarse martensite-austenite constituent (M-A) is obtained by lowering bainite transformation temperature during quenching process by controlling the alloying elements. Moreover the structure is very effective in obtaining good toughness for tempered steel even with the high strength X100 grade. Sufficiently low hardness and good toughness in heat affected zone (HAZ) are confirmed by welding tests. The trial production of developed steel is conducted by applying inline QT process in medium-size seamless mill according to an alloying design obtained in laboratory tests. The seamless pipes of the trial production achieve grades X80 to X100 by changing tempering temperature. Some data of mechanical properties of the produced pipes is introduced.
机译：随着深水或深井超深水油田的发展，发展高强度无缝管成为必要。本文描述了一种无缝钢管的冶金学设计，该无缝钢管的高强度达到X80-X100级（最低屈服强度，552 Mpa-689 Mpa），是由含碳量极低且贝氏体组织均匀的钢制成的。在实验室中研究了调质（QT）钢的显微组织对强度和韧性的影响。通过控制合金元素来降低淬火过程中的贝氏体转变温度，可以获得没有粗马氏体-奥氏体成分（M-A）的均匀贝氏体组织。此外，即使在高强度X100等级下，该结构也对获得回火钢良好的韧性非常有效。通过焊接测试确认了在热影响区（HAZ）中足够低的硬度和良好的韧性。根据实验室测试中获得的合金化设计，通过在中型无缝轧机中应用在线QT工艺进行开发钢的试生产。试生产的无缝管通过改变回火温度达到X80至X100级。介绍了所生产管道的机械性能的一些数据。

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