Electrolyte plasma polishing electrolyte solution for nickel-based superalloy and polishing method of electrolyte plasma polishing electrolyte solution

Abstract

The invention discloses an electrolyte plasma polishing electrolyte solution for a nickel-based superalloy and a polishing method of the electrolyte plasma polishing electrolyte solution. The polishing solution comprises the following raw materials by weight: 1.5%-3% of sulfate, 0.3%-1.5% of a complexing agent, and the balance of water. The polishing method comprises the following steps: 1) adding the mixed electrolyte into water, fully stirring the water until the electrolyte is uniformly mixed, heating the resulting product to 70-75 DEG C, and adding the prepared polishing solution into a polishing tank; (2) clamping a nickel-based superalloy workpiece to be polished to a special clamp and immersing the clamp into the electrolyte solution with an immersion depth of 10-50 mm; (3) introducing direct current, wherein the output voltage is 250-350 V and the polishing time is 1-10 min; and (4) taking out the polished workpiece, and cleaning and drying the workpiece. The provided electrolyte solution is neutral or slightly acidic, the electrolyte in the electrolyte solution is environment-friendly and pollution-free, the surface of the polished nickel-based high-temperature alloy is bright and glossy, and the polishing efficiency and the current efficiency are improved.

Description

technical field [0001] The invention relates to the field of electrolyte plasma polishing nickel-based superalloy, in particular to an electrolyte for polishing GH4169 nickel-based superalloy and a preparation method thereof. Background technique [0002] Nickel-based superalloys have good strength, hardness, oxidation resistance and corrosion resistance at high temperatures, as well as good thermal processing performance, welding performance and fatigue resistance, and are widely used in aviation, aerospace and new energy fields. The most common failure mode of aerospace parts is fatigue fracture, and because the surface of the part is the boundary between the part and the external environment, many fatigue cracks are generated on the surface, so the surface quality of the part has a significant impact on its durability limit and corrosion resistance. A good polishing process can reduce the surface roughness value of the part, improve the smoothness, and improve the corrosi...

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Problems solved by technology

However, since this invention is only applicable to electrolytic polishing of nickel-based superalloys, it is not suitable for electrolytic plasma polishing of nickel-based superalloys, and the electrolyte components used in this invention contain strong acids, which are highly toxic and dangerous, and the waste liquid produced is also difficult to handle

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