The invention relates to the technical field of
laser cladding, in particular to a
laser quick repair process method for a large
rotary machine bearing bush. According to the
laser quick repair process method, a layer of purpose-made powdered materials capable of meeting operating requirements is arranged on the surface of a part in advance; then, high-energy
laser beams are used for quick scanning
processing on the
coating; the powdered materials arranged in advance melt instantaneously and solidify;
base metal below the
coating melts into a
thin layer along with the
coating, molecular or atomic interdiffusion quickly occurs in a quite narrow area in a boundary between the
thin layer and the coating, and
solid metallurgical bonding is formed at the same time; a substrate is extremely little affected by heat under a rapid heating condition and does not deform. The laser quick repair process method for the large
rotary machine bearing bush achieves the effect that a local and whole-area
Babbitt metal laser cladding layer is formed on the substrate made of cast steel and
bronze alloy, a
Babbitt metal layer which is 1.0-15 mm is formed as required, and metallurgical bonding between
Babbitt metal and various substrates is realized; the laser cladding layer is low in
dilution, compact in structure and free of delaminating, air holes,
slag inclusion, cracks and other quality defects.