CHALLENGES OF PROPERTY INHERITANCE DURING THE TECHNOLOGICAL PROCESSING OF FUEL PUMP PRECISION PARTS

Authors

• Alakbar Huseynov Azerbaijan Technical University
• Azersilah Holding Baku
• Farid Huseynli Phd https://orcid.org/0009-0007-5393-9440
• Mirzabay Safarov National Aerospace Agency

DOI: https://doi.org/10.30678/fjt.160975

Keywords:

pasta, diffusion metallization, laser, complex boronchromization, surface hardness, roughness

Abstract

Laser surface hardening technology is a progressive innovation compared to traditional processing methods. The maximum hardening effect from laser surface treatment is achieved in combined technology, where the laser thermal treatment is preceded by a paste treatment or a coating application operation. With the discrete laser coating method of surface coatings, it is possible to create surfaces of certain shapes, sizes and properties on the surface, which will ensure the hardness, wear resistance and reliability of the surface during the friction process. During boronchromization, the following primary materials for powder mixtures were used: X97 ГОСТ 5905-79 chromium powder with a fraction of 0.07...0.2 mm; В4С3Н ТУ2-036-879-81 boron carbide polishing powder, ПЦ-2 ГОСТ 12601-76 zinc powder, Al2О3 GOST 3136-76 aluminum oxide. The complex diffusion metallization method chosen for the restoration of worn precision parts of fuel apparatus and pumps allows not only to restore linear dimensions, but also to harden the restored surfaces. Laser heating, which causes phase changes in the surface layer, requires a minimum density of radiation energy (103 - 104 W/cm²) and an exposure time of 10-3 - 10-2 s. It is possible to harden and restore the surface by applying paste to precision parts and then using the diffusion metallization method in vacuum with a laser.