A method for surface treatment of copper-zinc alloy cold stamping parts

Abstract

The invention mainly relates to the technical field of metal surface treatment, and discloses a surface treatment method for a copper-zinc alloy cold-stamped part. The surface treatment method comprises the following steps of cleaning, coarse grinding, pickling, fine grinding and oil-coating. The method is simple and is convenient to operate, so that roughness of the a copper-zinc alloy cold-stamped part is reduced to be 0.11 [mu]m, golden color of the copper-zinc alloy cold-stamped part is kept, oxidization is delayed, and the service life is prolonged by 2.5 times; a lipase solution is used to perform intermittent type ultrasonic cleaning, so that the surface treatment method is simple and efficient, quickly removes greasy dirt, can perform complete biodegradation and avoids pollution, on environment, of complex chemical components in a conventional cleanout fluid; after being frozen, a cleaned part is coarsely grinded, so that brittleness can be increased, abrasion on an abrasive belt is reduced, roughness of coarse grinding can be reduced, coarse grinding difficulty is reduced, high temperature generated during coarse grinding can be reduced, oxidization is avoided, and golden color is kept.

Description

technical field [0001] The invention mainly relates to the technical field of food additive processing, in particular to a surface treatment method for a copper-zinc alloy cold stamping part. Background technique [0002] Copper-zinc alloy is a kind of memory alloy, golden yellow, like the color of gold, commonly known as brass, and has a wide range of uses. Small fractures and flaws produced in the cold stamping process will affect the use value of copper-zinc alloy. [0003] Cold stamping is a pressure processing method that uses a stamping die to apply pressure to a sheet or hot material on a press at room temperature to cause plastic deformation or separation to obtain parts of the desired shape and size. The process is simple, but cold During the stamping process, the friction force is large, and the metal flow is intermittent, which is easy to cause defects such as breakage, wrinkling, and scratches on the plate, and will not scrap the stamping parts, but the surface o...

AI Technical Summary

Problems solved by technology

[0003] Cold stamping is a pressure processing method that uses a stamping die to apply pressure to a sheet or hot material on a press at room temperature to cause plastic deformation or separation to obtain parts of the desired shape and size. The process is simple, but cold During the stamping process, the friction force is large, and the metal flow is intermittent, which is easy to cause defects such as breakage, wrinkling, and scratches on the plate, and will not scrap the stamping parts, but the surface of the stamping parts needs to be treated to remove and dilute the defects. At present, the existing surface treatment method has cumbersome steps and complicated operation, and will also cause pollution to the environment. A titanium-chromium alloy stamping part and its surface treatment process disclosed in the patent document CN106187315A need to spray glaze on the surface of the stamping part, and then For PVD coating, first cover the metallic luster applied to the stamping parts, and then perform coating to increase the metallic luster. The process is cumbersome and covers up the original color of the stamping parts