Authors: Wonchol Son, UnChol Ri, Songgil Jong, GumChol Ri, HuiChong KANG Wonzun Ri, Sokchol Ri
In order to improve wear resistance of components such as screws with severe friction-wear, microstructure and wear resistance of Fe-C-Cr-Mo-V-Ti-N hardfacing metal were investigated. Ferroalloys added into the coating of hardfacing electrodes were nitrided jointly. The microstructure and wear resistance of hardfacing metals were characterized by means of X-ray diffraction (XRD), optical microscopy (OM), field emission scanning electron microscope (FESEM) and energy dispersive X-ray spectrometry (EDS). In addition, Factsage 7.0 software was used to calculate the equilibrium phase diagram of the hardfacing metals. The results show that the hardfacing layers mainly consist of martensite, austenite, α-Fe, M23C6, M7C3, V8C7-type carbides and MX-type complex precipitations (M= V, Ti; X=C, N). The Fe-C-Cr-Mo-V-Ti-N hardfacing layer possesses 1.5 times higher wear resistance than cladding layers without nitrides.
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[v1] 2019-12-08 20:02:08
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