Titanium carbide coating to improve surface characteristic, wear and corrosion resistance of spheroidal graphite cast irons

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NSTL

外文摘要：© 2022In this study, titanium carbide (TiC) coatings were grown on the surface of a spheroidal graphite cast iron (SGI) via thermo-reactive diffusion (TRD) using powder-pack processing at 800 °C, 850 °C and 900 °C for 4 h. The TiC coatings obtained on the SGI were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), surface profilometry, microhardness, VDI adhesion testing, wear testing, and electrochemical corrosion testing. Depending on the TRD temperature, continuous, crack-free, and smooth TiC coatings of 5–11 μm thickness and 27.96–32.45 GPa hardness were obtained on the surface. The high chemical stability, high hardness, and good adhesion strength of TiC coatings resulted in a reduced friction, high wear resistance, and superior corrosion resistance compared to the untreated sample. Delamination and oxidation assisted abrasive wear transformed into oxidation-assisted adhesive wear in the coated samples. Galvanic corrosion was dominant in untreated SGI, while homogeneous corrosion occurred in the coated samples. TiC coatings grown using TRD have the potential to be used in engineering components exposed to tribo-corrosive conditions.

外文关键词：

CorrosionSpheroidal graphite cast ironThermo-reactive diffusion techniqueTitanium carbide coatingWear

作者：

Gunen A.、Soylu B.、Karakas O.

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作者单位：

Department of Metallurgy and Materials Engineering Faculty of Engineering and Natural Sciences Iskenderun Technical University

Department of Metallurgy and Materials Engineering Institute of Graduate Studies Iskenderun Technical University

MMK Metallurgy Industry Trade and Port Co.

出版年：

2022

DOI：

10.1016/j.surfcoat.2022.128280

Surface & Coatings Technology

ISTP

ISSN：0257-8972

年,卷(期)：2022.437

参考文献量78