In　the　present　investigation,　carbon　and　chromium　were　added　into　the　submerged　arc　flux-cored　wire　in　two　different　ways　for　the　Cr5　deposited　metal.　The　chromium　carbide　was　added　into　fluxcored　wire　1#.　The　graphite　and　chromium　were　added　into　flux-cored　wire　2#.　The　results　showed　that　numerous　white　hard　phases　with　higher　alloy　content　dispersed　in　the　deposited　metal　1#,　in　which　the　element　distribution　and　microstructure　were　inhomogeneous　than　that　of　deposited　metal　2#.　After　experiencing　the　same　thermal　cycles,　the　cracks　initiated　early,　and　grew　quickly　in　the　specimen　1#.　In　the　process　of　thermal　fatigue,　cracks　grew　along　the　boundaries　of　the　hard　phases.　It　is　expected　that　the　serious　composition　segregation　was　the　main　reason　of　resulting　in　fast　growth　of　cracks　in　deposited　metal　1#.　It　was　effective　for　weakening　the　fatigue　crack　tendency　that　alloy　composition　distribution,　microstructures.　It　is　consistent　with　the　practical　application.Changing　the　addition　way　of　alloy　is　a　new　effective　way　for　grain　refinement　and　microstructure　uniformity　instead　of　modifying　agent　and　external　excitation.　©　Sila　Science.