INFLUENCE OF THE TEMPERIG TEMPERATURE AND LASER BEAM ON HARDNESS AND WEAR OF THE OVERLAY WELDED LAYERS
DOI:
https://doi.org/10.5755/j01.mech.17.6.1016Abstract
In this paper we report the results of overlay welded layers by automatic device under the flux, its hardness depending on tempering temperature and influence of laser beam on structure and wear.
Specimens of structural steel Ст3 were overlay welded with material powders sprayed over the surface and melted under the coating of flux or material powder mixtures sprayed over the surface melted unemployed standard flux.
The all components were melted by arc between continuously supplied 1.2 mm diameter low carbon steel wire Cв 08 and structural steel Ст3. For overlay welding standard flux AMS1 (have more 50% MnO and SiO2), chromium, tungsten, Fe – 70% Mn and boron carbide (Ba4C) and SiCaBa powder, secondary material powders (glass, high speed steel P6M5 chips, metal ceramic plates BK – 8, SiC from grinding disks) and to increase amount of carbon the graphite powders were used.
Overlay welded layers was periodically impacted by laser beam in microscopical analiser MLA10. The wear tests have been done by abrading welded specimens at applied load 320 N. For the wear of overlay welded layers influence of structure, chemical composition and hardness was obtained. Laser beam treatment of overlay welded layers in no all senses increase the wear resistance.
