Study on Wear Behaviors of Ni₃Al/Cr-Carbides Cladding Layer on High Strength Steel Substrate

Abstract:

A cladding layer of Ni₃Al matrix composite reinforced with 18 vol. % Cr-carbides was applied by using tungsten inert gas (TIG) welding process on high strength steel substrate. The filler metal as welding wire prepared by horizontal continuous casting process with a composition of Ni-2.5C-30Cr-9Al-0.02B (in wt. %) is used. A bulk material of NAC-alloy composite with 18 vol. % Cr₃C₂-particles produced by Hot Isostatic Pressing (HIP) was also investigated as a reference material. The composition of NAC-alloy is Ni-9.87Al-11.63Fe-0.50Mn-0.50Ti-0.2B in weight percentage. The pin-on-disk (POD) tribometer tests were carried out at room temperature in dry sliding condition at a pressure of 2.83 MPa (20N). The results revealed that Ni₃Al/ Cr-carbides cladded layer by TIG process improved wear properties significantly with very low values of the friction coefficient (0.13 ± 0.02) and the specific wear rate (0.162 x 10^-5 mm³/N·m) as compared to the reference HIP processed composite with the friction coefficient (0.68 ± 0.02) and the specific wear rate (0.908 x10^-5 mm³/N·m) under the same testing conditions.

• Periodical: Advanced Materials Research (Volume 936)
• Pages: 1273-1282
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.936.1273
• Online since: June 2014
• Authors: Ka Rin Gong*, Tong Bang An, Zhi Feng Zhou, Zhi Ling Tian, Chang Hai Li
• Keywords: Cladding, Friction Coefficient (FC), Intermetallic, Sliding Wear, Specific Wear Rate

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