Steel and titanium alloy low-temperature pulse ion nitrocarburizing and cathode arc ion plating M/MN alternate plating thick-film technology

Abstract

The invention discloses a steel and titanium alloy low-temperature pulse ion nitrocarburizing and cathode arc ion plating M / MN alternate plating thick-film technology, and belongs to the technical field of material surfaces. The technology is characterized in that the stress relief annealing is performed for a workpiece 3 by cold rolling or cold drawing; a nitrocarburizing layer and M / MN alternate composite thick-film layer with a mildly transitional hardness of a wear resistant layer on the surface of the workpiece is prepared to prevent the falling of a coating film; a transition layer with a thickness of 1-3 microns is formed between a modified layer and an ion plating M film layer to improve the adhesiveness of the coating film; ion plating M and MN alternate coating films are prepared; the ion plating M film can partially absorb the internal stress of the MN plating film; and the plating film is not liable to fall. The technology has the effects and benefits of solving low hardness and weak wear resistance of a titanium alloy, replacing electroplating hard chromium, having no environmental pollution, having no harm to human bodies and having wide application range, such as molds, machine tool parts, mine machinery, locomotives and piston rings.

Description

technical field [0001] The invention belongs to the technical field of material surface, and relates to low-temperature pulse ion nitrocarburizing and cathodic arc ion plating M / MN alternate thick film plating process, and prepares a nitrocarburizing layer whose hardness of a wear-resistant layer on the surface of a workpiece is in a moderate transition distribution+ M / MN alternating composite thick film layer; M stands for Cr, or Ti, or Al, or CrTiAl: N stands for nitrogen or NH 3 : MN represents CrN, or TiN, or AlN, or CrTiAlN. Background technique [0002] The current electroplating hard chrome process method: hanger-chemical degreasing-washing-drying-preheating-anodic treatment-impulse current-electrochrome plating-water washing-drying-inspection-packaging-warehousing, the problems in the electroplating process are: The use of acid-base salts seriously pollutes the environment, and hexavalent chromium is produced during the electroplating process, which is harmful to th...

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Problems solved by technology

[0006] The effects and benefits of the present invention are: to solve the environmental pollution caused by electroplating hard chromium; the hardness of titanium alloy is not high, and the wear resistance is insufficient; the hardness of the wear-resistant layer on the surface of the workpiece can be prepared with a moderate transitional nitrocarburizing layer + M / MN alternate composite thickness The film layer is not easy to fall off in the service hard coating layer; the preparation of the wear-resistant thick coating by the present invention is widely used, and all steel and titanium alloy workpieces such as molds, fixtures, machine tool parts, chemical machinery, agricultural machinery, mining machinery, locomotives, shafts, Rods, cylinder liners, piston rings, intake and exhaust cutting, textile machinery, aerospace, aviation, petrochemical, electric power, communications, automobiles, medical treatment, ships and other fields

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