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

作　　者：郭伟 蔡艳[1,2] 华学明 GUO Wei;CAI Yan;HUA Xueming(Shanghai Key Laboratory of Materials Laser Processingand Modification,Shanghai JiaoTong University,Shanghai 200240,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China)

机构地区：[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]高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《电焊机》2020年第11期7-11,I0003,共6页Electric Welding Machine

基　　金：国家重点研发计划(2017YFB0703003)。

摘　　要：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 perf-ormance 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.

关 键 词：高锰钢 奥氏体化元素 元素烧损 热裂纹 低温性能 

分 类 号：TG457.11[金属学及工艺—焊接]