WC

x

/CoCrCuFeNi

1-x

（x=0

0.1

0.2

0.3）high entropy alloy composite coatings were prepared on 304 stainless steel surface by electron beam cladding technology with different tungsten carbide（WC）content.The phase composition and microstructure of the composite coatings with different WC content were investigated by using X-ray diffraction（XRD）and scanning electron microscopy（SEM）.The surface hardness of the composite coatings was measured by vickers hardness micrometer.The results show that the high-entropy alloy coatings with different WC content are composed of simple face-centered cubic structure（FCC）phase

and with the increase of WC content

the intensity of diffraction peak of FCC phase is gradually weakened

and the position of diffraction peak is also gradually shifted to a lower angle.When WC is absent in the coating

the coating structure is mainly composed of equiaxed crystals.When WC is added

a small number of columnar crystals appear in the middle and bottom position of the coating.Compared with laser cladding and arc melting

element segregation can be effectively inhibited by high-energy electron beam with the high cooling rate

so the degree of segregation in the coating is relieved.With the increase of WC content

cracks in the coating is decreased gradually

while the hardness is increased firstly and then decreased.