The invention discloses a re-manufacturing method for direct
laser cladding of a failed carburized
quenching piece. The method comprises the following specific steps that (1), surface treatment is carried out, specifically, surface treatment is performed on the surface of a base body of the failed carburized
quenching piece, so that the surface is kept clean and is free of an
oxide layer; (2),
laser cladding is carried out, specifically, according to a matrix material, a cladding material is selected, a cladding device is selected, process parameters during cladding are set, and
laser claddingre-manufacturing repair is carried out on the surface of the treated failed carburized
quenching piece; and (3), inspection is carried out, specifically, crack detection and
hardness detection are carried out on the carburized quenching piece. When the laser cladding is carried out in the step (2), the used re-manufacturing
repair material is a
powder material and has a particle size of 150 meshes to 270 meshes; and the
repair material comprises the following components of, in percentage by
mass, 0.1 wt.%-0.17 wt.% of C, 15 wt.%-18.5 wt.% of Cr, 0.3 wt.%-1.00 wt.% of Mn, 1.0 wt.% -1.5 wt.% ofSi, 1.2 wt.%-2.0 wt.% of Mo, 0.8 wt.%-1.50 wt.% of B, 1.2 wt.%-2.0 wt.% of Ni, and the balance Fe. According to the re-manufacturing method, laser cladding can be carried out without removing a carburized layer, a cladding layer is free of cracks, the forming process is good, and meanwhile, the cladding layer has excellent
wear resistance.