摘要
采用闪光对焊焊接工艺制备了贝氏体钢与奥-贝钢心轨焊接接头。分析了组织的金相、硬度以及拉伸、冲击和疲劳性能。研究结果表明:焊接接头中主要以贝氏体为主,夹杂着少量的铁素体组织,接头的奥贝钢侧热影响区存在马氏体。焊接接头具有良好的硬度、拉伸和冲击性能,其疲劳性能达到500万次,高于TB/T1632.2-2005要求。
In this paper,the weld joint of austenitic-bainitic alloy railway switch and bainitic steel were presented by flash butt welding. The microstructure,micro-hardness,tensile strength,impact strength and fatigue were investigated.The results showed that there was bainitic in the morphology basically,with some ferrite.And there was also some martensite in the heat affected zone （HAZ）.The welded joint showed perfect mechanical properties.lt has the perfect fatigue properties of 5 000 000 times which higher than TB/T1632.2-2005 standard.
出处
《电焊机》
2008年第8期16-18,72,共4页
Electric Welding Machine
关键词
闪光对焊
奥-贝钢
贝氏体钢
flash butt welding
austenitic-bainitic alloy steel
bainitic steel
