TiC Particle Reinforced Reactive Plasma Cladding Composite Coating by the Precursor Carbonization-Composition Process

Abstract

Fe-Cr-Ti-C composite powder was prepared by precursor carbonization-composition process using the mixture of ferrotitanium, chromium, iron powders and precursor sucrose as raw materials. In situ synthesized TiC particle reinforced composite coating was fabricated on substrate of Q235 steel by reactive plasma cladding process using Fe-Cr-Ti-C composite powder. Microstructure of the coating was observed by scanning electron microscope (SEM), the phases in the coating were determined by X-ray diffraction (XRD), and the wear resistance of the composite coating was evaluated under dry sliding wear test conditions at room temperature. Results indicate that the composite coating consists of in-situ the reinforcing TiC carbide, (Cr,Fe)7C3 eutectics and austenitic, and is metallurgically bonded to the Q235 steel substrate. TiC carbide in the composite coating showed the gradient distribution. TiC particles present granular in the fusion zone and central zone, and present dendritic in the surface of the composite coating. Hardness of the coating from surface to fusion zone is little difference, the average hardness of the coating is about HV0.2750, is as 3.2 times as the base. The wear mass loss of Q235 base material is 12 times as that of the composite coating.

First-principles calculation on LaAlO3 as the heterogeneous nucleus of TiC

“…Because of its high hardness and wear resistance, Fe-Cr-C-Ti alloy has been widely applied in metallurgical, mineral and cement industries [1][2][3]. According to its microstructure, the Fe-Cr-C-Ti alloy can be divided into hypoeutectic, eutectic and hypereutectic ones, and the microstructure is mainly composed of martensite and complex carbides, such as MC, M 7 C 3 and M 23 C 6 [4,5].…”

Influence of Process Parameters on Microstructure of Reaction Plasma Cladding TiC-Fe-Cr Coating

“…Laser equipment costs 4-5 times as much as plasma equipment. Studies have been shown that the production efficiency of plasma cladding is about 6-10 times of laser cladding, and the powder utilization ratio of plasma cladding is about 2-4 times that of laser cladding [9][10][11]. Therefore, plasma cladding technology has broad application prospects in many fields such as machinery, electric power, coal and metallurgy.…”