ConferencePaper
1604-2004: SUPERNOVAE AS COSMOLOGICAL LIGHTHOUSES  (2003)

Development and microstructural analysis of TiC/TiC-Ni coatings on 347H stainless steel using CO2 laser scanning

Bansal V.; Ramos, J. A.; Bourell D.L.; Govindaraju M.R.

Keywords: temperature, evolution, corrosion, resistance, gas, micron, coatings, surfaces, surface, features, light, alloys, dioxide, nickel, steel, ni, bonds, carbon, optical, substrates, carbide, wear, titanium, mixing, applications, low, metallurgy, welding, coating, speeds, scanning, lasers, mirrors, raster-scanning, modification, Materials, Metallurgical, Stainless, cameras, High, Inert, good, indicating, sizes, Microstructural, Deposited, porosities, analyses, metallographies, hardnesses

Abstract

Pre-deposited coatings consisting of pure TiC and TiC+Ni micron size powders were consolidated over the surface of 347 stainless steel flat specimens by means of a high speed raster-scanning 1 kW CO2 laser with a TEM00 beam of about 0.4 mm diameter. Samples were characterized using SEM, EDS, XRD, optical metallography and microhardness. The coatings showed a strong metallurgical bond with the substrate, good mixing of substrate and coating materials on the surface, rapid dilution of coating within the substrate, low porosity and a considerable increase in surface hardness. Some of the microstructural features observed are explained in the light of solidification theory. This technique could serve applications where selective regions of a steel substrate need to be wear-resistance enhanced.

Más información

Título de la Revista: 1604-2004: SUPERNOVAE AS COSMOLOGICAL LIGHTHOUSES
Editorial: ASTRONOMICAL SOC PACIFIC
Fecha de publicación: 2003
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-57349091304&partnerID=q2rCbXpz