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13 August 1993 Laser surface alloying of steel with TiC
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Laser technology enables a specimen surface to be melted and alloyed without the substrate itself being heated, whereby a surface with special attributes is obtained while the properties of the substrate are unchanged. The surface of Armco iron, AISI 1045, and AISI 1095 steels were laser alloyed with TiC powder, using a CO2 laser of 2.5 kW maximum power. Optimal laser and powder feed parameters were established. Particles of TiC were injected into the molten surface layer, forming a composite material, steel + TiC. The microstructures were investigated metallographically. Some of the particles had partially melted during their passage through the laser beam and had re-solidified, forming small and fine dendrites. Surface hardness increased, mainly due to the presence of these undissolved TiC particles. A new mathematical model describing the alloying process, based on the equation of heat conductance, to the alloying process is presented.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. Ariely, Menahem Bamberger, Helmut Huegel, and Mark Geller "Laser surface alloying of steel with TiC", Proc. SPIE 1972, 8th Meeting on Optical Engineering in Israel: Optoelectronics and Applications in Industry and Medicine, (13 August 1993);


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