Laser preprocessing method for remanufacturing of blade part

• Main Authors: HUANG ZHIGANG, ZHANG YONGJUN, GU YONGYU, LUO HONGPING, WANG GUAN, ZHANG YONGKANG
• Format: Patent
• Language: English
• Published: 09.12.2015
• Subjects: COMBINED OPERATIONS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; OTHER WORKING OF METAL; PERFORMING OPERATIONS; TRANSPORTING; UNIVERSAL MACHINE TOOLS

The invention discloses a laser preprocessing method for remanufacturing of a blade part. The laser preprocessing method comprises the steps that firstly, a blade is washed and the surface of the blade is coated with an absorption material layer, then the back side of the blade is impacted by means of a high-power short pulse laser, materials in a transverse invisible crack position on the front side break into flying pieces under the effect of impact waves, and then the invisible cracks become visible; secondly, the front side of the blade is impacted, small-scale invisible cracks are pressed under the effect of laser impact waves, a visible crack area is ablated by means of a long pulse laser, and a welding groove is formed; and finally, the crack area is scanned repeatedly by means of a long pulse laser, so the temperature of the materials in the area is increased and solid is molten, and meanwhile the small-scale invisible cracks are eliminated. By the adoption of the laser preprocessing method, the transverse invisible cracks can be made visible, and the small-scale invisible cracks can be eliminated; in this way, the invisible cracks can be repaired while the visible cracks are repaired, and accordingly the service life of the repaired blade is prolonged, and the maintenance cost is reduced.