Effect of nano-WC content on microstructures and wear resistance of laser cladding Fe-based alloy coatings

Abstract

Abstracts Three kinds of Fe-based power with different content of nano-WC were successfully prepared on 35CrMoV steel using laser cladding technique. The influence of nano-WC on the macro-morphology, microstructure and wear resistance of Fe-based coatings under different wear conditions was investigated by scanning electron microscopy and three-dimensional non-contact surface mapping. It has been found that a lot of fine grains and equiaxed grains synthesized with the addition of nano-WC. Both the volume fraction of eutectics and wear resistance of Fe-based coatings are greatly increased with a moderate addition of nano-WC, which is attributed to the exist of the partial dissolution of hard and high temperature WC phase in the composite coating. The wear rates increase more than 2–3 times with the addition of nano-WC range from 5 wt% WC to 10 wt%WC. Hence the addition of nano-WC strengthening phase is an effective and feasible way to improve the mechanical properties, especial for the tribological properties.

Wear and corrosion behavior of nano carbide dispersed AISI304 stainless steel by laser surface processing

“…. Nano carbide dispersed Fe has also been reported to be developed recently by Gao et al [23] by mixing Fe particles with nano WC (5 wt.% and 10 wt%) and laser cladding with a DLS300C laser. This kind of nano carbide dispersion has also been reported to increase the wear resistance of steel substrates.…”

“…Reports are also available to develop metal matrix composite coating by laser cladding technique [16][17][18][19][20][21][22][23][24][25][26][27]. Tehrani et al [16] developed WC-Ni composite coating by electroless plating of WC on Ni and its laser melting using Nd:YAG laser.…”

Simultaneously Improving Microstructures and Wear Properties of Ni60 Coating by Heat Treatment

“…Due to the excellent corrosion resistance and wear properties of Ni60 (Ni-Cr-B-Si) alloys, they have been widely used in metallurgy, mining, and other fields for the repair and protection of fragile parts [3]. Therefore, laser cladding Ni60-based coating on the 35CrMoV substrate is an effective way to reinforce the surface performance of components [4]. Nevertheless, the cracks and stress concentration are susceptible to generation in the laser cladding process [5].…”

Effect of CeO2 on crack sensitivity and tribological properties of Ni60A coatings prepared by laser cladding

“…In this case, cracks and voids usually occur in the coating. 12,13 In order to reduce the cracking sensitivity of the laser coating and improve the surface quality, many scholars try to add other powders into the original powder. Especially in recent years, rare earth oxides has been demonstrate that it could effectively refine the grain structure, purify the molten pool.…”