Development and Application of φ457 mm x 25.4 mm Large Size X65QO Seamless Steel Tube for Deep Subsea

熊刚; 夏文斌; 李端正; 田研

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Development and Application of φ457 mm x 25.4 mm Large Size X65QO Seamless Steel Tube for Deep Subsea

更新时间：2026-01-21

- Development and Application of φ457 mm x 25.4 mm Large Size X65QO Seamless Steel Tube for Deep Subsea
- Special Steel Vol. 42, Issue 5, Pages: 41-45(2021)
- 作者机构：
  
  1. 中海石油(中国有限公司)海南分公司,海口,570311
  2. 湖南衡阳华菱钢管(集团)有限公司技术中心,衡阳,421001
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：27 January 2021，
  
  Online First：03 February 2023，
  
  Published：03 February 2021
- 稿件说明：
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熊刚, 夏文斌, 李端正, et al. Development and Application of φ457 mm x 25.4 mm Large Size X65QO Seamless Steel Tube for Deep Subsea[J]. Special Steel, 2021, 42(5): 41-45.
DOI：

熊刚, 夏文斌, 李端正, et al. Development and Application of φ457 mm x 25.4 mm Large Size X65QO Seamless Steel Tube for Deep Subsea[J]. Special Steel, 2021, 42(5): 41-45. DOI：

摘要

设计研制了生产深水油气田大口径海底管线用无缝钢管的成分要求和工艺路线。小批量试制X65QO海底管线管，试制结果表明

通过微合金成分优化(/% ：0.15Mo，0.04Nb，0.09V，0.06Ti)

皮尔格周轧管工艺，配合930 ℃淬火+670 ℃回火调质工艺

X65QO钢级深海海底管线管屈服强度为~500 MPa

抗拉强度为~580 MPa

-30℃低温冲击功＞300J

裂纹尖端开口位移(CTOD)以及焊接性能和氢致裂纹(HIC)性能较好，完全符合用户的要求。

Abstract

The composition and process flowsheet of deep water oilfield large size deep subsea pipeline steel have been designed and developed. The experimental batch results of X65QO steel seamless tube show that: through the optimization of micro alloy composition (/% ：0.15Mo

0.04Nb

0.09V

0.06Ti)

pilger tube rolling process

combined with 930 °C quenching and 670 °C tempering process

the yield strength of X65QO steel grade seamless steel tube for deep sea is ~500 MPa

the tensile strength is ~ 580 MPa

and the low temperature impact at -30°C is more than 300J

the CTOD ( Crack Tip Opening Displacement)

welding properties and HIC (Hyrogen-Induced Cracking) properties are good

which fully meet customer requirements.

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