海洋工程装备与技术

海洋工程装备与技术 ›› 2014, Vol. 1 ›› Issue (2): 160-165.

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大型液化天然气船围护系统及其低温金属材料焊接技术

林文虎1, 华学明1,,A;*, 吴毅雄1, 唐永生2, 张汇平2   

  1. 1. 上海交通大学上海市激光制造与材料改性重点实验室,上海 200240
    2. 沪东中华造船(集团)有限公司,上海 200129
  • 收稿日期:2014-05-29 出版日期:2014-03-29 发布日期:2017-08-12
  • 通讯作者: 华学明
  • 作者简介:

    林文虎(1991-),男,博士研究生,主要从事焊接冶金和失效分析.

  • 基金资助:
    工业和信息化部高技术船舶科研计划"新型液化天然气船液货围护系统预先研究项目"

Reviews of the Cargo Containment Systems of Large Scale LNG Carriers and the Welding of Related Low Temperature Metals

Wen-hu LIN1, Xue-ming HUA1, Yi-xiong WU1, Yong-sheng TANG2, Hui-ping ZHANG2   

  1. 1. Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Hudong-Zhonghua Shipbuilding (Group) Co.,Ltd., Shanghai 200129, China
  • Received:2014-05-29 Online:2014-03-29 Published:2017-08-12

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摘要：

液化天然气(LNG)船围护系统的材料选择影响液货舱的结构设计,安全性设计和成本设计,其中金属材料是与设计和制造过程关联程度最大的因素.讨论了围护系统的承力构件和保温层的组成结构,考虑在-196 ℃具有可行性的低温金属材料有Invar合金,304L不锈钢,Ni9钢和A5083铝合金.材料的导热性能影响隔热层设计和焊接冶金,强度影响板材厚度的设计,厚度则影响材料的成本,加工,搬运,安装和焊接.总结了4种金属材料的材料性能参数和焊接性.

关键词: 液化天然气船, 低温金属材料, 材料性能, 焊接性

Abstract:

Materials selection of liquefied natural gas (LNG) cargo containment systems has influence on the design of structure, safety and cost. As cryogenic temperature metals make up the most in LNG carriers, they are closely related to the design and manufacture. Considering the bearing part and insulation part of containment system, four different metals including invar alloy, 304L stainless steel, Ni9 steel and A5083 aluminum alloy can be taken into account. Thermal conductivity influences the insulation layer's design and welding metallurgy, while low mechanical strength improves the thickness of plate that influences the processing, moving, installation and cost. Material parameters and welding techniques of them are summarized.

Key words: liquefied natural gas carrier, low temperature metal, mechanical properties, weldability

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