Effects Of Dispersants And Defoaming Agents On The Performance Of Grinding Wheels Made By Sol-Based In-Situ Molding
Keywords
Sol-Gel Diamond Dispersant Defoamersol-Gel Diamond Dispersant Defoamer
Abstract
Using diamond micropowder and silica sol as raw materials, the sol-gel in-situ molding method was used to prepare diamond/ceramic bond grinding wheels. The effects of 4 kinds of dispersants and 3 kinds of defoaming agents on the diamond/ceramic bond mixed slurry and Influence of grinding wheel performance. The results show that: when the addition amount (mass fraction) of naphthalene-based water reducing agent is 0.4%, the viscosity of the mixed slurry reaches the minimum value, and the dispersion and fluidity are optimal; when the addition amount of silicone DD defoamer When it is 0.2%, the microstructure of the composite sintered body becomes uniform, the porosity is the smallest, and the flexural strength is the largest; compared with the grinding wheel without additives, the structure of the grinding wheel with dispersant and defoaming agent is uniform and dense, and the cemented carbide after grinding The surface quality of the workpiece is good, without deep scratches, and the surface roughness is 0.04 ¦Ìm. With micro diamond powder and silica sol as raw materials, the diamond and vitrified grinding wheel were prepared by sol-gel in-situ method.The effect of dispersant and defoamer on the properties of mixed slurry and abrasives was studied.The results show that with 0.4% naphthalene based super plasticizer added, the dispersity and the fluidity of mixed slurry are good, and the viscosity reaches the minimum value.When the addition of silicone defoamer DD is 0.2%, the microstructure of the composite sintered body is uniform with the minimum porosity and the maximum bend strength.Compared with the grinding wheel without additives, the microstructure of grinding wheel with dispersant and defoamer is dense and uniform.The surface The quality of cemented carbide grinded by the new designed wheel is better. No deep scratches were observed, and the surface roughness was 0.04 ¦Ìm.
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Original research was done by Wan Long¢k, Liu Yingying, Wang Junsha, Li Jianwei, Xu Junjie, Li Yingying
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