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工藝參數(shù)對SiCp/101Al復合材料電子束焊接頭的影響
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江蘇省自然科學基金資助(BK2002094)


Effects of Electron Beam Welding Parameters on SiCp/101Al Welded Joints
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    摘要:

    以SiCp/101Al復合材料為研究對象，采用真空電子束焊接技術(shù)，研究在不同工藝參數(shù)條件下獲得接頭的組織與性能。通過拉伸試驗，研究不同工藝參數(shù)對獲得接頭力學性能的影響；利用光學顯微鏡觀察分析不同參數(shù)條件下接頭區(qū)域的金相組織；采用透射電鏡觀察SiC-A1界面微觀結(jié)構(gòu)；利用掃描電鏡觀察接頭斷口形貌；利用X射線衍射儀測定接頭焊縫區(qū)的相結(jié)構(gòu)。結(jié)果表明，在保證試件完全焊透的情況下，降低電子束的線能量，可在一定程度上提高接頭的強度；接頭中的氣孔主要形成于熔合線區(qū)域，快速焊接和電子束掃描可使氣孔形成受到大大抑制；進一步的修飾焊有利于提高焊接接頭的質(zhì)量

    Abstract:

    SiC particulate reinforced aluminium metal matrix composites SiCp/101Al were welded by electron beam welding with different welding parameters, and the structure and properties of welded joints were investigated. The mechanical properties of welded joints with different welding parameters were studied through tensile test. The microstructure of weld metal was analyzed with optical microscope and the morphology of joint fracture was observed by SEM. The interfacial structure of SiC-A1 was analyzed with TEM, and the phase constituent of welded joint was tested by XRD. The results show that the joint strength can be improved by decreasing the heat input power of electron beam when getting the penetration bead. Some pores appeared mainly near in the bond line, but porosity can be suppressed to a great extent by increasing welding speed or electron beam scanning. Moreover, the modification of welding is advantageous to improve the joint qualities.

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季小輝,王少剛,董桂萍.工藝參數(shù)對SiCp/101Al復合材料電子束焊接頭的影響[J].稀有金屬材料與工程,2009,38(9):1650~1654.[Ji Xiaohui, Wang Shaogang, Dong Guiping. Effects of Electron Beam Welding Parameters on SiCp/101Al Welded Joints[J]. Rare Metal Materials and Engineering,2009,38(9):1650~1654.]
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  • 收稿日期:2008-09-13
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