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

被引:37
作者
Guenen, Ali [1 ]
Soylu, Betuel [2 ,3 ]
Karakas, Ozguer [3 ]
机构
[1] Iskenderun Tech Univ, Fac Engn & Nat Sci, Dept Met & Mat Engn, TR-31200 Antakya, Turkey
[2] Iskenderun Tech Univ, Inst Grad Studies, Dept Met & Mat Engn, TR-31200 Antakya, Turkey
[3] MMK Met Ind Trade & Port Co, TR-31400 Antakya, Turkey
关键词
Spheroidal graphite cast iron; Thermo-reactive diffusion technique; Titanium carbide coating; Wear; Corrosion; THERMAL REACTIVE DIFFUSION; AISI D3 STEEL; CHROMIUM CARBIDE; MECHANICAL-PROPERTIES; PACK CEMENTATION; FAILURE ANALYSIS; GROWTH-BEHAVIOR; STAINLESS-STEEL; BORIDE COATINGS; HEAT-TREATMENT;
D O I
10.1016/j.surfcoat.2022.128280
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In 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 degrees C, 850 degrees C and 900 degrees 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 mu m 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.
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页数:17
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