EFFECTOF ALLOY ING FILLERMETAL ADD ITION ONM ICROSTRUCTURE OF LASER BEAM WELDED SiCP/6061AlMMC
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摘要: 以N i 片作为合金化填充材料对SiCP/6061A l 金属基复合材料(SiCP/6061A lMMC) 进行激光焊接, 研究了激光输出功率、焊接速度等焊接工艺参数对焊缝显微组织的影响。结果表明, 采用金属N i 片作为合金化填充材料对SiCP/6061A lMMC 进行激光焊接, 可以在一定程度上抑制SiC 颗粒的溶解及针状脆性相Al4C3 的形成, 并获得以Al3Ni 等相为增强相的焊缝显微组织, 但在焊缝心部有粗大的气孔形成。
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关键词:
- SiCP/6061Al 复合材料 /
- 激光焊接 /
- 合金化填充材料 /
- Al3Ni
Abstract: A SiC particle reinforced alum inum alloy metalmatrix composite, SiCP/6061A lMMC, is welded by laser beam w elding using nickel p lates as alloying fillermetal. M icrostructure of thew eld ischaracterized as functions of laser p rocessing parameters. Results show that the dissolution ofreinforcement SiC particles and formation of the needle-like harmful Al4C3 phases are noticeablysupp ressed using nickel as the alloying filler metal. The new reinforcements, such as Al3Ni, AlNi,etc, are p roduced in-situ in theweld by laser beam w elding of SiCP/6061AlMMC using nickel plate asalloying filler metal.-
Key words:
- SiCP/6061AlMMC /
- laser beam welding /
- alloying filler metal /
- Al3Ni
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