CuAlBe/Ni/1Cr18Ni9Ti固相扩散焊

CuAlBe/Ni/1Cr18Ni9Ti Solid Diffusion Bonding

以Ｎｉ 箔作中间层对新型阻尼材料ＣｕＡｌＢｅ 合金与１Ｃｒ１８Ｎｉ９Ｔｉ 不锈钢固相扩散焊接头的微观组织作了试验研究。结果表明，焊接热－ 力循环易使ＣｕＡｌＢｅ 合金近界面生成粗大的β相，α相沿晶界网状分布，这将引起热弹性马氏体阻尼功能退化；同时，ＣｕＡｌＢｅ 合金与１Ｃｒ１８Ｎｉ９Ｔｉ 不锈钢两者塑性变形能力的差异在较大程度上影响着扩散焊初期的原子扩散，进而影响稳定扩散阶段的冶金结合性。此外，焊接过程中原子相互扩散在一定程度上影响着接头的断裂特征。

The experiment analyzed the microstructure of solid diffusion bonding between CuAlBe —— a new type damping material and 1Cr18Ni9Ti stainless steel with Ni foil interlayer. The result showed that the microstructure of CuAlBe alloy nearby interface may be of roar β phase following a network α phase distributing in grain boundary after thermal force cycle. This will cause degeneration of damping function of the thermal elastic martensite. At the same time, the atom diffusion was affected greatly by the difference of plastic deformation ability between CuAlBe and 1Cr18Ni9Ti at initial period of diffusion bonding, moreover ,this would affect metallurgy weld ability at steady diffusing period. Besides, atom diffusion in welding process exerts some influence on fracture character of material in certain degree.