摘要
采用Al-Si-Mg钎料成功实现了5005铝合金与1Cr18Ni9Ti不锈钢的真空钎焊,借助扫描电镜、能谱分析仪和X射线衍射仪对焊后接头界面组织进行分析,同时对接头抗剪强度进行测试.结果表明,焊后接头界面结构从1Cr18Ni9Ti不锈钢侧到5005铝合金侧的界面组织依次为Fe Al,Fe Al3,FemAln+αAl.随着钎焊温度的升高或保温时间的延长,接头抗剪强度均呈现先升高后降低的变化趋势.当钎焊温度为580℃,保温时间为15 min时,接头抗剪强度达到最大值49 MPa.接头断裂形式受钎焊温度的影响,当钎焊温度较低时,接头断裂于铝合金侧氧化膜层及FemAln+αAl反应层;温度升高至580℃时,接头断裂于FemAln+αAl反应层中,接头抗剪强度最高.
Vacuum brazing of 5005 aluminum alloy and1Cr18Ni9 Ti stainless steel was carried out with Al-Si-Mg filler foil. The interfacial microstructure and mechanical properties of the brazed joints were investigated by scanning electron microscope,energy dispersion spectrometer,x-ray diffractometer and tensile test,respectively. The experimental result showed that the typical interface structure of the joints was 1Cr18Ni9 Ti stainless steel/FeA l/FeA l3/FemAln+ αAl/5005 aluminum alloy.With brazing temperature and holding time,inereased the shear strength of the joints increased firstly and then decreased. Besides,mechanical property tests showed thatwhen the brazing temperature was 580℃ and the holding time was15 min,the maximum shear strength of joints was 49 MPa. Moreover,the fracture form of the joints was mainly affected by the brazing temperature. When the brazing temperature was low,the joints fractured in the oxide layer and FemAln+ αAl layer. When the temperature was high,the joints fractured in FemAln+ αAl layer completely.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2017年第1期107-111,共5页
Transactions of The China Welding Institution
基金
清华大学先进成形制造教育部重点实验室开放基金资助项目(2010007)
