摘要
粗晶区是焊接接头性能最为薄弱的区域,在高酸性气田服役条件下更为突出。通过焊接热模拟的方法研究了焊接热输入和不同后热处理状态对L415级管线钢粗晶区组织和性能的影响。结果表明,采用焊接热输入为25 kJ/cm,焊后进行700℃×1 h的退火处理时,可以获得较好的组织和性能,-30℃冲击吸收能量平均值为260 J。
Coarse grained region is the weakest region in the welded joint,especially under the service condition of high acid gas.The influence of heat inputs and post-treatments on the coarse grained region of L415 pipeline steel were studied by welding thermal simulation.The results showed that the joint with better microstructure and properties can be obtained at the heat input of 25 kj/cm and annealing treatment at700 ℃ for 1 hour,the average Charpy impact absorbed energy at-30 X.can reach up to 260 J.
出处
《焊接》
北大核心
2013年第11期49-52,71-72,共4页
Welding & Joining
关键词
L415管线钢
焊接热模拟
粗晶区
热输入
后热处理
L415 pipeline steel
welding thermal simulation
coarse grained region
heat input
post-treatment
