The TIG welding is used for surfacing to study the cladding layers of Ni

3

Al and Ni

3

Al+Cr

3

C

2

intermetallic compoundbased metal powder-cored wires on different substrate materials.The results show that:（1） After cladding

the average dilution rate of Ni

3

Al+Cr

3

C

2

wire（34.55%） is lower than that of Ni

3

Al wire（42.8%）;（2） The microstructure of cladding layer after surfacing with pure Ni

3

Al metal powder-cored wire is mainly single γ’-Ni

3

Al phase

and when using Ni

3

Al+Cr

3

C

2

wire

the cladding layer is mainly composed of γ’-Ni

3

Al phase and MC type and M23 C6 type carbides;（3）The microhardness of Ni

3

Al+Cr

3

C

2

cladding layer is significantly higher than that of pure Ni

3

Al cladding layer;（4） Using Ni

3

Al

Ni

3

Al+Cr

3

C

2

metal powder-cored wire for cladding on 4 kinds of experimental substrates

the bead has good metallurgy bonding and wetting

and few defects after surfacing

and the hardness of the surfacing layer is higher than that of the base metal

so it can be used for surfacing of related materials.