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- W4224212140 abstract "Abstract In the search for versatile and effective weld cladding processes to deposit ultra-wear-resistant Ni-WC MMC (Ni-based tungsten carbide metal matrix composite) overlays for mining applications, there is an increasing interest in exploring advanced low-heat-input cold metal transfer (CMT) method. Depositions of single weld bead tracks of Ni-WC MMCs on steel plates were performed by employing CMT process; Taguchi design of experiments was used to plan the experimental investigation. All weld tracks exhibit continuous and uniform bead profile and sound metallurgical bonding to the substrate. Retained WCs are present in the overlay tracks relatively uniformly. Formation of primary WC and secondary carbides is observed depending on the level of dilution. In contrast to traditional gas metal arc welding (GMAW) processes, volume fraction of retained WC ( f WC ) is not directly correlated with heat input for CMT process, and can reach a high level together with improved weld bead appearance at high deposition rate. f WC is negatively correlated with dilution rate. Deposition rate has a positive correlation with average instantaneous power, which is, in turn, positively correlated with wire feed speed. Addition of oxygen into shielding gas mixtures promotes carbide transfer from cored feed wire to the weld track and increases f WC . Analysis of Signal-to-Noise ratios shows that it is difficult to find a single set of optimized process control parameters, and trade-offs are needed in the engineering practice. The present investigation demonstrates that CMT process has a clear advantage for depositing Ni-WC MMC overlays over traditional GMAW technologies and that Taguchi method is a powerful tool in process improvement for weld cladding of Ni-WC MMC overlays." @default.
- W4224212140 created "2022-04-26" @default.
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- W4224212140 date "2022-04-21" @default.
- W4224212140 modified "2023-10-15" @default.
- W4224212140 title "Experimental investigation into weld cladding of Ni-WC MMC overlays by CMT process" @default.
- W4224212140 doi "https://doi.org/10.21203/rs.3.rs-1556833/v1" @default.
- W4224212140 hasPublicationYear "2022" @default.
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