LNG用低温高锰钢及其焊接技术发展

LNG用低温高锰钢及其焊接技术发展 Development of low-temperature high manganese steel and its welding technology in LNG field 郭伟 GUO Wei 1 first-author 蔡艳 CAI Yan 1 2 华学明 HUA Xueming 1 2 上海交通大学上海市激光制造与材料改性重点实验室 上海交通大学上海市激光制造与材料改性重点实验室 Shanghai Key Laboratory of Materials Laser Processingand Modification,Shanghai Jiao Tong University Shanghai Key Laboratory of Materials Laser Processingand Modification,Shanghai Jiao Tong University 高新船舶与深海开发装备协同创新中心 高新船舶与深海开发装备协同创新中心 Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration 随着国际LNG产业的迅猛发展,对LNG储运低温材料的需求日益增加。为了兼顾服役性能和制造成本,Mn元素含量为20%～28%的低温高锰钢得到关注。该钢种采用Mn元素替代Ni元素,并添加适量的C、N、Cu等元素,在控制成本的同时获得良好的组织稳定性和低温强韧性,具有广阔的应用前景。低温高锰钢焊接时易出现热裂纹、元素烧损以及接头低温性能下降等问题,对焊接材料开发和焊接工艺优化提出了较高要求。加强对LNG船用低温高锰钢及其焊接技术的研发,有助于提高我国船舶制造企业的国际竞争力。 With the rapid development of international LNG industry,the demand for low-temperature materials of LNG storage and transportation is increasing. For both the service performance and manufacturing cost,the low-temperature high manganese steel with Mn content of about 20% ～28% has been paid more and more attention. Mn is used instead of Ni,and C,N,Cu are added to some extent. The low-temperature high manganese steel has a broad application prospect because of its low cost and good austenite stability. The common problems of low-temperature high manganese steels welding include hot crack,element burning,and low temperature performance of joint. High requirements on welding consumable development and welding technology optimization are put forward. The research and development of low-temperature high manganese steel and its welding technology will help to increase the international competitiveness of China’s LNG shipbuilding industry. 高锰钢 奥氏体化元素 元素烧损 热裂纹 低温性能 high manganese steel austenitizing elements burning loss hot crack cryogenic properties TG142.1;TG457.11 国家重点研发计划(2017YFB0703003) 2022-03-08 11 50