摘要
研究了铝合金表面激光熔覆 Fe Al青铜层的组织结构, 结果表明, 熔覆层的组织结构为孪晶结构的 α Cu+ 颗粒状( Cu, Fe, Si)9 Al4 (γ1 )+ 少量的 Cu3 Al(β), 硬质点相强化、孪晶强化、细晶强化和固溶强化的共同作用使得熔覆层的维氏硬度达到了 3 000 M Pa~3 500 M Pa, 明显高于其名义硬度 1 800 M Pa~2 100 M Pa。同时, 分析了熔覆层相结构的形成原因。
The microstructure of a laser clad Fe Al bronze coating on an Al alloy substrate has been investigated. The results show that the structure of the coating is twinned α Cu with twin structure, pellet like aluminide (Cu, Fe, Si) 9Al 4( γ 1 ) and a small amount of aluminide Cu 3Al( β ). The microhardness of the laser clad coating (3 000 MPa^3 500 MPa)is much higher than that of the alloy. This significant hardening effect is contributed to the formation of hard phases, the twin ned structure, fine grains and pronounced solid solution strengthening. The reason for the formation of the observed structures in the clad is also discussed.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
1999年第4期218-221,共4页
Rare Metal Materials and Engineering
基金
高等学校博士点学科专项科研基金
关键词
激光熔覆层
铝合金
青铜
组织
相结构
laser clad coating, Al alloy, Fe Al bronze, microstructure and phase structure