Author
J.C. Gutierrez
Bio: J.C. Gutierrez is an academic researcher from National University of Colombia. The author has contributed to research in topics: Abrasion (mechanical) & Shielded metal arc welding. The author has an hindex of 1, co-authored 1 publications receiving 279 citations.
Papers
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TL;DR: In this paper, a study was made to compare the microstructure and abrasion resistance of hardfacing alloys reinforced with primary chromium carbides, complex carbides or tungsten carbides.
318 citations
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TL;DR: In this article, a new complex Fe-Cr-W-Mo-Nb alloy with high boron content was set into comparison with lower alloyed materials on basis Fe−Cr-B-C, a synthetic multiphase alloy on iron base with around 50.1% tungsten carbides and a crack free martensitic Fe•Cr-C alloy containing finely precipitated Niobium carbides.
192 citations
TL;DR: A comprehensive survey of welding processes used to deposit wear resistant overlays is presented in this paper, based on both literature review and research work performed at the Canadian Centre for Welding and Joining.
173 citations
TL;DR: In this article, the effect of ferroboron and the amount of powder mixture on wear resistance of hardfacing alloys was investigated. And the results showed that increasing the powder mixture amount enhanced the wear resistance.
125 citations
TL;DR: In this article, four kinds of welding deposits were evaluated, applied through two different welding processes: flux cored arc welding and shielded metal arc welding (SMAW), and the most important variable to improve abrasion resistance is the microstructure of hardfacing deposits, where the carbides act as barriers to abrasive particle cutting.
112 citations
TL;DR: In this article, the effect of carbide degradation in a WC/W 2 C reinforced Ni-based hardfacing was assessed under abrasive and combined impact/abrasive conditions.
Abstract: Within this work, the effect of carbide degradation in a WC/W 2 C reinforced Ni-based hardfacing was assessed under abrasive and combined impact/abrasive conditions. In view of the above, a WC/W 2 C reinforced Ni-based hardfacing was deposited by plasma transferred arc (PTA) welding using different welding currents. Microstructure was characterised by quantitative metallography to determine specific structural parameters: mean carbide diameter and carbide area fraction. Scanning electron microscopy (SEM, EDS) and X-ray diffraction (XRD) were also used to characterise carbide dissolution mechanism. Tribological behaviour was determined with a 3-body abrasion test according to ASTM G65 and with a cyclic impact/abrasion test (CIAT). Results showed significant carbide degradation with increasing welding current, resulting in a significant reduced primary carbide content and carbide diameter. Reduced carbide content indicated a significantly wear rate increase under pure 3-body abrasion conditions. Specific wear energy was determined under pure abrasive condition and showed significant dependence on the primary carbide content. However, wear rates under combined impact/abrasion were at constant level due to the reduction of the brittle primary carbide content.
100 citations