摘要
采用实物焊接和热模拟的方法研究了大型原油储罐用610MPa级高强度钢板大热输入焊接性能。结果表明,试验钢具有良好的抗大热输入量焊接的能力,原因是钢板中存在大量细小、弥散分布的TiN复合粒子,在焊接热循环的高温阶段,TiN粒子通过有效钉轧奥氏体晶界和促进铁素体晶内形核,抑制了焊接热影响区组织粗化;采用气电立焊和埋弧横焊焊接后,焊接对接接头的拉伸强度、低温冲击和冷弯性能优良,性能指标富余量大,试验钢板完全可以应用于10万m3及以上大型石油储罐的建造。
The welding performance of 610 MPa high-strength steel plate for large oil storage tank was studied by large heat input real welding and thermal simulation. The results showed that the test steel had better ability to bend large heat input welding. There are many fine and dispersed second-phase TiN complex particles in the test steel, which can refine HAZ grain by prevent growth of primitive austenite and promote phase transformation of ferrite as nucleus. The mechanical properties of the test steel after welding by electro gas arc welding and submerged arc welding were very well, it is feasible to manufacture large oil storage tank with 0.1 million m3 capacity or above by the 610 MPa high-strength steel.
出处
《山东冶金》
CAS
2012年第4期36-39,共4页
Shandong Metallurgy
关键词
原油储罐用钢
焊接性能
大热输入
热模拟
埋弧横焊
steel plate for oil storage tank
welding performance
large heat input
thermal simulation
submerged arc welding
