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.
作者
郭伟
蔡艳
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)
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)。
关键词
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
