A kind of superalloy chemical polishing agent and preparation method thereof

Abstract

The invention relates to a high-temperature alloy chemical polishing agent and a preparation method thereof, and belongs to the technical field of high-temperature alloy treatment. The polishing agentcomprises the components of 50 g / L to 70 g / L of sulfuric acid, 30 g / L to 70 g / L of phosphoric acid, 5 g / L to 7 g / L of sodium methylene bis-naphthalene sulfonate, 1 g / L to 1.5 g / L of sodium dodecyl sulfate, 3 g / L to 6 g / L of glycerinum, and the balance being water. The preparation method comprises the steps that phosphoric acid and sulfuric acid are mixed and are fully stirred, the temperature isdecreased to the room temperature, and a component A is obtained; sodium methylene bis-naphthalene sulfonate, sodium dodecyl sulfate and glycerinum are added into water, and a component is obtained after stirring; the component A is added into the component B, the components are fully stirred, and the polishing agent is obtained. According to the high-temperature alloy chemical polishing agent andthe preparation method thereof, the polishing agent does not contain nitric acid and hydrochloric acid, less volatile harmful gases are generated during operation, stability is good, environmental pollution is low, and surface quality of a polished high-temperature alloy is high; and in the method, the situations that during mixing, the temperature of the polishing agent is increased as sulfuricacid releases heat, and harmful gases are generated due to decomposition of nitric acid are avoided.

Description

technical field [0001] The invention relates to a high-temperature alloy chemical polishing agent and a preparation method thereof, belonging to the technical field of high-temperature alloy processing. Background technique [0002] Superalloys have excellent high-temperature strength, good oxidation resistance and hot corrosion resistance, and are widely used in the manufacture of key components in the aerospace field. In recent years, with the rapid development of superalloy laser selective melting forming technology, higher requirements have been put forward for the rough surface of superalloy components after laser selective melting, especially the rough surface finish of the inner runner. [0003] At present, there are three main methods for superalloy polishing: mechanical polishing, chemical polishing and electrochemical polishing. Among them, the accessibility of mechanical polishing is poor, and the electrochemical polishing process is complicated, so it is difficu...

AI Technical Summary

Problems solved by technology

Among them, the accessibility of mechanical polishing is poor, and the electrochemical polishing process is complicated, so it is difficult to meet the requirements of polishing with complex shape structure and inner flow channel structure.

Chemical polishing has the advantages of simple process, convenient operation, and is suitable for workpieces with complex shapes. However, there is currently a lack of efficient chemical polishing agents for superalloys.

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