Domestic Development of ENiCrMo-6 Electrode for LNG Storage Tank

WANG Qingjiang; HU Pengliang; ZHENG Qingming; LIU Manyu; CHEN Bo; XU Kai; WU Pengbo

doi:10.7512/j.issn.1001-2303.2023.01.17

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Domestic Development of ENiCrMo-6 Electrode for LNG Storage Tank
Vol. 53, Issue 1, Pages: 112-117(2023)
DOI： 10.7512/j.issn.1001-2303.2023.01.17

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王庆江，胡鹏亮，郑庆铭，等.LNG储罐用ENiCrMo-6型焊条的国产化研制［J］.电焊机，2023，53（1）：112-117.

WANG Qingjiang, HU Pengliang, ZHENG Qingming, et al.Domestic Development of ENiCrMo-6 Electrode for LNG Storage Tank[J].Electric Welding Machine, 2023, 53(1): 112-117.
王庆江，胡鹏亮，郑庆铭，等.LNG储罐用ENiCrMo-6型焊条的国产化研制［J］.电焊机，2023，53（1）：112-117. DOI： 10.7512/j.issn.1001-2303.2023.01.17.

WANG Qingjiang, HU Pengliang, ZHENG Qingming, et al.Domestic Development of ENiCrMo-6 Electrode for LNG Storage Tank[J].Electric Welding Machine, 2023, 53(1): 112-117. DOI： 10.7512/j.issn.1001-2303.2023.01.17.

摘要

ENiCrMo-6型焊条主要用于9%Ni钢制液化天然气（LNG）储罐的焊接，其长期依赖进口导致生产成本较高、技术发展受限，实现国产化十分必要。介绍了国产镍基合金ENiCrMo-6型焊条的研制，选用纯镍焊芯和CaO-CaF,2,-TiO,2,渣系作为焊条药皮的基础渣系组合。对研制的ENiCrMo-6焊条进行焊接工艺性试验、微观组织观察和力学性能试验，结果表明其工艺性水平与进口焊条相当，熔敷金属和焊接接头的强度、塑性和韧性优良，满足9%Ni钢制LNG装置的设计和施工要求，其中-196 ℃低温冲击吸收能量远高于技术要求，可应用于实际工程。

Abstract

ENiCrMo-6 electrode is mainly used for welding LNG plant made by 9%Ni steel on land and ship. Its long-term dependence on import leads to high production cost and limited technology development, so it,',s necessary to realize the localization. In this paper, the development of domestic ENiCrMo-6 electrode is introduced. The pure nickel core and CaO-CaF,2,-TiO,2, slag system are selected as the base slag system of the electrode coating to make the electrode meet the requirements of engineering application with suitable for alternating welding, all position welding and excellent manufacturability. The manufacturability, microstructure and mechanical properties of the developed ENiCrMo-6 electrode are studied. The results show that its technology level is equivalent to that of imported electrode, and the strength, plasticity and toughness of the deposited metal and the welded joint are excellent and can meet the design and construction requirements of the 9%Ni steel LNG plant. The impact absorbed energy at -196 ℃ is far higher than the technical requirements, which can be applied to practical projects and solve the situation that this electrode depends on imports for a long time.

关键词

9%Ni钢ENiCrMo-6焊条熔敷金属力学性能全位置

Keywords

9%Ni steelENiCrMo-6 electrodedeposited metalmechanical propertiesall position

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