The invention relates to a method for performing stainless steel strip-
electrode submerged-arc build-up
welding on low-
alloy parent steel. The method comprises the following steps: S1, performing preheating before
welding, and performing first-layer stainless steel strip-
electrode submerged-arc build-up
welding on a surface to be subjected to build-up welding, of the low-
alloy parent steel, so as to form a first stainless steel build-up welding layer; S2, performing post-heating treatment; S3, performing second-layer stainless steel strip-
electrode submerged-arc build-up welding and third-layer stainless steel strip-electrode submerged-arc build-up welding on the first stainless steel build-up welding layer so as to form a second stainless steel strip-electrode submerged-arc build-up welding layer and a third stainless steel strip-electrode submerged-arc build-up welding layer; and S4, performing postwelding heat treatment. According to the method, the thicknesses of hardening
layers of transition regions of stainless steel strip-electrode submerged-arc build-up welding joints are effectively controlled by controlling preheating temperature, interlayer temperature, welding currents, welding voltages, welding speed, temperature of post-heating treatment, time of post-heating treatment, temperature of postwelding heat treatment and time of postwelding heat treatment, so that the thicknesses of the hardening
layers are reduced by over 50%; the
bonding strength of the build-up welding
layers and the parent steel is improved; the problem that in the prior art, a stainless build-up welding layer on the low-
alloy parent steel can crack, and even be stripped off, at a stainless steel strip-electrode submerged-arc build-up
welding joint is solved.