Salt bath nitriding treatment method for compressor high-speed steel sliding sheet

Abstract

The invention provides a salt bath nitriding treatment method for a compressor high-speed steel sliding sheet, and belongs to the technical filed of machines. The problem that a white bright layer isformed through an existing salt bath nitriding treatment method for the compressor high-speed steel sliding sheet is solved. The salt bath nitriding treatment method for the compressor high-speed steel sliding sheet comprises the following sequence steps that first, pre-treatment is conducted, specifically, a workpiece is clamped and cleaned; second, preheating is conducted, specifically, the workpiece is loaded into a salt bath furnace to be preheated; third, salt bath nitriding treatment is conducted, specifically, nitrogen is led into the salt bath furnace in the salt bath nitriding treatment process, and salt bath nitriding salt is composed of the following components of, by weight, 30%-50% of urea, 25%-40% of sodium carbonate, 20-30% of potassium carbonate and 5%-10% of lithium carbonate; fourth, oil cooling is conducted; and fifth, aftertreatment is conducted. By adopting the salt bath nitriding treatment method to machine the compressor high-speed steel sliding sheet, the whitebright layer cannot be formed on the surface of the compressor high-speed steel sliding sheet.

Description

Technical field [0001] The invention belongs to the field of chemical technology, and relates to a surface chemical treatment, in particular to a salt bath nitriding treatment method for a compressor high-speed steel sliding vane. Background technique [0002] Compressor slides are mainly made of high-speed steel and stainless steel; because of different raw materials, the processing technology of compressor slides is not completely the same; especially the surface treatment process of compressor slides. There are many related documents on the production of compressor sliding vanes, such as salt bath nitrocarburizing of high-speed steel sliding vanes (publication number CN1616705A), salt bath nitrocarburizing of stainless steel sliding vanes (publication number CN161674A), a compressor The manufacturing method of sliding vane (authorization announcement number CN1239826C), salt bath nitriding method for high-speed steel air-conditioning compressor blades (application publication ...

AI Technical Summary

Problems solved by technology

However, in the technical scheme described in the salt bath nitrocarburizing treatment of high-speed steel slides (publication number CN1616705A), a white layer of 2 to 3 μm will be formed. If the white layer is not removed, the coating formed by the PVD treatment process will be high in hardness and brittle. During the use of the compressor, the white layer is easy to crack, so that the service life of the sliding vane cannot meet the design requirements

Although the technical solution recorded in the salt bath nitriding treatment method for high-speed steel air-conditioning compressor blades (application publication number CN101871087A) can make the surface of the workpiece difficult to form a white layer, it cannot guarantee that the white layer will not form, and thus cannot guarantee the quality of the product.

To ensure the quality of the product, the current technical solution is to use a grinder to grind off the white layer, but there are problems of increased production cycle and increased production cost.

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