谢俊峰
,
朱有利
,
黄元林
,
白昶
材料工程
doi:10.11868/j.issn.1001-4381.2015.03.010
对2A12-T3和2A11-O铝合金进行了超声波焊接,研究了不同超声波焊接工艺参数对焊接界面结合状况的影响.采用扫描电镜、电子背散射衍射和透射电镜研究了焊接界面的组织结构.结果表明,当超声波焊接振幅为30μm,焊接时间为0.2s,焊接界面结合状况较好,焊接界面的线性焊接密度接近100％.氩气保护也会对线性焊接密度产生影响.当焊接振幅为15μm时,氩气保护可提高线性焊接密度;但当焊接振幅为30μm,氩气保护对线性焊接密度无明显影响.超声波焊接过程中,焊接界面上产生波纹和漩涡状塑性流动,发生动态回复和连续动态再结晶,形成由位错缠结、位错胞、亚晶和细小晶粒组成的焊接界面组织.
关键词:
超声波焊接
,
线性焊接密度
,
氩气保护
,
塑性流动
,
连续动态再结晶
W.Xie
金属学报(英文版)
Shanghai No.5 Steel Co., Ltd. has recently introduced a set of 5-ton protective atmosphere electroslag remelting furnace and a set of lO-ton helium-cooling vacuum arc remelting furnace,both of them are the first one of its kind in China. With these equipment, remelting processes about alloy GH4169, GH2132 and GH738 were researched, the process of producing alloy GH4169 by VIM+ VAR + ESR triplex-process was developed, and their effects were discussed.
关键词:
superalloy
,
null
,
null
