Development and Sliding Wear Behavior of Co-Mo-Cr-Si Cladding through Microwave Heating
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The aim of the present study is to improve the sliding wear resistance of pure titanium grade-2 substrate by developing CoMoCrSi (Tribaloy T400) cladding on it by using microwave hybrid heating technique. The developed cladding is characterized by microstructural features, phase analysis, measurement of microhardness by employing a scanning electron microscope (SEM), X-ray diffraction (XRD) and Vickers microhardness. The cladding and substrate are subjected to sliding wear test against alumina counterpart at elevated temperatures under dry conditions using a pin on disc tribometer. The test is performed by varying normal load and temperatures, whereas sliding speed is maintained constant. The developed clad shown partial melting of CoMoCrSi powders and obtained sound metallurgical bonding with the substrate. The high specific energy of microwave diluted the substrate atoms into cladding region which forms Cr3C2, Co3Ti, and TiC, phases confirmed by phase analysis. The cladding obtained better porosity and microhardness are 1.5 ± 0.2% μm and 760 ± 35 Hv respectively. The substrate exhibits low microhardness of 182 ± 25 Hv. The cladding exhibits 6 times of lower volume loss and 70.14% of less wear rate with respect to the substrate. The cladding experienced least coefficient of friction is 0.55 compared with the substrate. The worn surfaces of cladding and substrate are examined. The detailed mechanism of wear is discussed in this paper.
KeywordsTribaloy Microwave cladding Partial melt Metallurgical bonding Sliding wear
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Authors wish to thank Mechanical Engineering department NITK Surathkal for their encouragement and support to carryout wear experiments. This research work did not fund by any government or non-government sectors.
- 10.Sharma AK, Gupta D (2010) Method of cladding/coating of metallic and nonmetallic powders on metallic substrates by microwave irradiation, Indian patent 2010, application No. 527/DelGoogle Scholar
- 20.Prasad CD, Joladarashi S, Ramesh MR, Srinath MS, Channabasappa BH (2019) Microstructure and tribological behavior of flame sprayed and microwave fused CoMoCrSi/CoMoCrSi-Cr3C2 coatings. Mater Res Express 6(2019):026512Google Scholar