Imperfections in chromiun carbide overlays deposited by submerged arc welding

Full text: Welded deposited chromium carbide overlay's has been widely used in various branches of welding overlay's industry related to wear. Characterization techniques are an important tool in the development of chromium carbide overlays resistant to wear, enabling the identification of phases, constituents and Imperfections. In this work one used optical microscopy, scanning electron microscopy and energy dispersive spectroscopy, electron backscattered diffraction and X-ray diffraction on chromium carbide overlay's deposited by submerged arc welding process in order to better understand the microstructure and the imperfection in this material. The characterization techniques identified precisely the elements of the overlay's enabling point of the main cause of the observed imperfections such as cracks, porosities and clusters of particles known in the industry as 'rice crispies'. (author)