The affect of cladding reparation rate（25%

50%

75% and 100%） on mechanical property of 15-5PH precipitation hardening stainless steel is studied. Cladding repairing samples are also used for testing fractograph

metallographic structure

internal flaws and microstructure hardness. The results show that the tensile strength under different cladding reparation rate is higher than the matrix; however its ductility decreases with the increase of cladding reparation rate. Among all the studied samples

the tensile strength and mechanical property reach the peak under 25% cladding reparation rate sample. The metallographic structures of cladding reparation area

heat-affected zone and undamaged matrix is compact. Among them

the structure of heat-affected zone shows apparent direction

with refined grains and flawless interface and surface. The microstructure hardness rises from cladding reparation to matrix

with peak value in heat-affected zone. The adhesive force of cladding area is weaker than that of inner matrix. The results show that fractograph of samples all resemble V shape.