Ceramic microcrystalline grinding wheel for grinding cobalt-chromium-nickel alloy sealing block and manufacturing method of ceramic microcrystalline grinding wheel

Abstract

The invention belongs to the technical field of grinding machining, and particularly relates to a ceramic microcrystalline grinding wheel for grinding cobalt-chromium-nickel alloy sealing block and amanufacturing method of the ceramic microcrystalline grinding wheel. The ceramic microcrystalline grinding wheel comprises a first ceramic microcrystalline abrasive, a second ceramic microcrystallineabrasive, a low-temperature ceramic binding agent, an additive, a pore-forming agent, a temporary binder and a wetting agent. The coarse-grain-sized first ceramic microcrystalline abrasive is taken asthe main abrasive; the fine-grain-sized second ceramic microcrystalline abrasive is taken as the auxiliary abrasive; the low-temperature ceramic binding agent which is prepared from the raw materialsof SiO2, B2O3, Al2O3, K2O, Na2O, MgO, and TiO2 in a certain ratio and through high-temperature smelting is selected to be matched with the additive (MnO2) in a certain ratio; and the shortage of workpiece burning and the grinding wheel surface retentivity conflict when an existing ceramic microcrystalline grinding wheel grinds and machines a cobalt-chromium-nickel alloy is overcome.

Description

technical field [0001] The invention belongs to the technical field of grinding, and in particular relates to a ceramic microcrystalline grinding wheel for grinding a cobalt-chromium-nickel alloy sealing block and a preparation method thereof. Background technique [0002] The sealing characteristics of aero-engine seals have a very important impact on engine performance, especially the gas path seal, which will directly affect the increase of engine boost ratio and turbine efficiency. Studies have shown that when the seal leakage is reduced by 1%, the engine thrust will increase by 1%, and the fuel consumption rate will decrease by 0.1%. If the sealing leakage is reduced by 1%, the thrust will increase by 0.8%, and the fuel consumption rate will decrease by 0.5%. Therefore, the gas path sealing technology that reduces the gap between the compressor, turbine blade tip and casing has become an important means to improve engine performance. [0003] At present, the commonly ...

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Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the defects of workpiece burns and grinding wheel surface retention conflicts in the existing vitrified microcrystalline grinding wheel when grinding cobalt-chromium-nickel alloys, thereby proposing a grinding wheel for grinding Vitrified microcrystalline grinding wheel of cobalt-chromium-nickel alloy sealing block and preparation method thereof

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