A long period lamellar carbide(Cr_7C_3)is found inFe-base clad zone,a large amount of dislocations and the Ni_3Si phases inNi-base clad zone,and a lot of stacking faults on Co-base clad zone.

• 实验表明:Fe 基熔覆层内形成了长周期结构的层片状 Cr_7C_3、孪晶和位错; Ni 基熔覆层内存在着大量位错和 Ni_3Si相;