热输入对2Al2铝合金焊接接头组织及性能的影响
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摘要
选用两组不同焊接热输入分别对2Al2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2Al2铝合金时比较理想的焊接热输入,即7.2~9 k J/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 2Al2 aluminum alloy by adopting two groups of different welding heat input. The tensile test, bend test, hardness test, macro examination and metallographic structure analysis were conducted for welded joint. By comparing the change of mechanical properties and metallographic structure under 2 kinds of welding heat input, especially the effect of heat input on the softening degree and grain size, the ideal welding heat input, namely7.2~9 k J/cm, was optimized for 2Al2 aluminum alloy, which is used to guide the welding production of similar products.
The WPQ(welding procedure qualification) was carried out for 2Al2 aluminum alloy by adopting two groups of different welding heat input. The tensile test, bend test, hardness test, macro examination and metallographic structure analysis were conducted for welded joint. By comparing the change of mechanical properties and metallographic structure under 2 kinds of welding heat input, especially the effect of heat input on the softening degree and grain size, the ideal welding heat input, namely7.2~9 k J/cm, was optimized for 2Al2 aluminum alloy, which is used to guide the welding production of similar products.
引文
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[2]王元良.铝合金运载工具轻量化及其焊接新技术的发展[J].电焊机,2005,35(9):14-18.
[3]胡敏英,吴志生,赵菲,等.铝合金激光焊接的工艺特点及发展现状[J].热加工工艺,2007,36(15):88-91.
[4]李兵,谢里阳,张君一,等.2Al2铝合金搅拌摩擦焊工艺与焊缝组织特征分析[J].制造技术与机床,2008(1):69-73.
[5]张凌峰,熊毅,张毅,等.2Al2铝合金在激光冲击下的组织与性能[J].轻合金加工技术,2011(10):59-62.
[6]马壮,李应红,任旭东,等.LY2铝合金激光冲击处理实验研究[J].航空精密制造技术,2007,43(3):48-49.
[7]范勇,王声波,吴鸿兴,等.7050航空铝合金激光冲强化残余压应力研究[J].应用激光,2003,23(1):7-10.
[8]杨志坤,李明,杨卫国,等.2Al2铝合金板焊接裂纹分析[J].新技术新工艺,2006(4):90-92.
[9]中国机械工程学会热处理分会.热处理工程师手册[M].北京:机械工业出版社,2002.
[10]黎俊初,周德生,刘大海,等.2Al2铝合金筋板件T型搅拌摩擦焊工艺及焊后热处理[J].材料科学与工艺,2011(2):80-85.