Transactions of Materials and Heat Treatment

Title：Forging and heat treatment process on connection hub for deep-sea system

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ClassificationCode：TG115

year,vol(issue):pagenumber：2024,49(1):54-58

Abstract：

Based on the development experience of a deep-sea oil and gas field in the South China Sea, and based on the working condition requirements of on-site low-temperature and high-pressure, the forging and heat treatment process of the deep-sea connection system forgings were reasonably designed to ensure that the connection hub forgings met the development and production needs of deep-sea oil and gas wells. Then, combined with chemical composition control, the trial production of large-wall-thickness forgings of connection system was carried out, and the related analysis on the chemical composition, mechanical properties, impact energy and microstructure of the forgings samples were carried out. The results show that the chemical composition and mechanical properties of the forgings are excellent and meet the actual requirements of deep-sea production working conditions. After the optimization of production process, the mechanical properties and impact fracture toughness of the forgings are good. The microstructure after heat treatment is granular bainite + ferrite with with grain size of 9. The grain size at different positions is more uniform, and there is no obvious difference in non-metallic inclusions.

Funds：

工业和信息化部高技术船舶与科研项目（MC-202030-H04）；国家发展和改革委员会项目（LSZX-2020-HN-05）；国家发展和改革委员会科技攻关项目（CCL2020HNFN0183）

作者简介：董晓雨（1982-），男，硕士，高级工程师 E-mail：dongxy10@cnooc.com.cn 通信作者：刘统亮（1997-），男，硕士，工程师 E-mail：liutl6@cnooc.com.cn

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