Comparative Study of Plasma Cladded Fe-Based Composite Hardfacings with In Situ Synthesized Cr and Ti Carbide Reinforcement

Abstract:

This study aimed to compare the X3CrNiMo17-13-3 stainless steel based plasma transferred arc (PTA) cladded hardfacings, reinforced with the in-situ synthesized Cr and Ti carbides. Carbon black and either pure Cr, pure Ti, or TiO₂ were utilized as reinforcement precursors (the respective hardfacings are further referred to as Cr+C, Ti+C and TiO₂+C). The pre-placed mixtures of matrix and reinforcement precursor powders were remelted by the plasma transferred arc, applying the preliminarily optimized process parameters (95 A, 22 – 24 V, 0.2 mm/s). As a reference, the unreinforced stainless steel hardfacing was used. The carbide reinforcement was successfully in-situ synthesized in all the hardfacings. The Cr + C hardfacing exhibited the largest average hardness (556 ± 29 HV1), while the TiO₂ + C hardfacing had the largest average Young’s modulus (156.3 ± 19.7 GPa). The Cr + C and Ti + C hardfacings demonstrated the 2.3 and 2.1 times higher resistance to abrasive wear than the reference hardfacing. The TiO₂ + C hardfacing showed 1.5 times lower wear resistance than the reference hardfacing presumably due to a lack of the reinforcement and a lower strain hardening ability.

• Periodical: Solid State Phenomena (Volume 320)
• Pages: 83-89
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.320.83
• Online since: June 2021
• Authors: Dmytro Tkachivskyi*, Mart Viljus, Rainer Traksmaa, Maksim Antonov, Andrei Surzhenkov, Kristjan Juhani, Priit Kulu
• Keywords: Carbide Reinforcement, Cladding, Fe-Based Hardfacing, In Situ Synthesis, PTA

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