Material Removal Characteristic of Laser Cladding Cobalt-Based Alloy in the Photochemical Process

Abstract

Cobalt-based alloy materials, widely used for laser cladding, are difficult to process. To address this problem, and based on the analysis of the physicochemical properties of cobalt and its compounds, a method for removing cobalt-based alloy materials under photocatalytic conditions was proposed under the effect of ultraviolet photocatalysis and chemical corrosion. In this study, a material removal model under photocatalytic conditions was established, and the reaction principle of cobalt-based alloys under ultraviolet photocatalysis and chemical corrosion conditions was described. We designed a corrosion solution configuration test and established a cobalt-based alloy processing test based on a pneumatic wheel test platform. The processing test proved that the combination of ultraviolet (UV) photocatalysis and Basic Yellow 40 + TiO 2 chemical corrosion pretreatment can significantly increase the mechanical material removal rate of cobalt-based alloy materials and effectively reduce surface roughness. At the same time, processing efficiency can be increased over 40%. This showed that the new method is capable of performing well in the field of mold cobalt-based alloy coating processing in the future.

A critical review of copper electroless deposition on glass substrates for microsystems packaging applications

“…Excimer lasers remove material from the workpiece by ablation. It can be either photo-thermal [224], photochemical [225,226], or combined [227,228]. The material removal by the photo-thermal process is due to the melting and vaporization; however, direct chemical bond decomposition results in material removal during the photochemical The energy of a krypton fluoride excimer laser [229] having an emission wavelength of 248 nm is roughly 5 eV.…”