摘要
选用两组不同焊接热输入分别对2A12铝合金进行了焊接工艺评定，并对焊接接头进行了拉伸试验、弯曲试验、硬度检测、宏观检查及金相组织分析等。通过对比两种不同焊接热输入下所焊焊接接头的力学性能及金相组织的变化，尤其是焊接热输入对焊接接头软化程度及晶粒度的影响，优化出焊接2A12铝合金时比较理想的焊接热输入，即7．2—9kJ／cm。该结论可用于指导同类产品的焊接生产、，
The WPQ（welding procedure qualification） was carried out for 2A12 aluminum alloy by adopting two groups of different wehling heat input. The tensile test, bend test, hardness test, macro examination and metallographic structure analysis were conducted for wehted joint. By comparing the change of mechanical properties and metallographic structure under 2 kinds of welding heal input, especially the effect of heat input on the softening degree and grain size, the ideal wehting heat input, namely 7.2-9 kJ/cm, was optimized for 2A12 aluminum alloy, which is used to guide the welding production of similar products.
出处
《焊管》
2015年第9期41-44,共4页
Welded Pipe and Tube
关键词
焊接
2Al2铝合金
焊接热输入
金相组织
力学性能
welding
2A12 aluminum alloy
welding heat input
metallographic structure
mechanical properties
