Tungsten-removing treatment method of tungsten carbide work piece

Abstract

The invention relates to the technical field of tungsten-removing treatment methods and provides a tungsten-removing treatment method of a tungsten carbide work piece, which has no damages on human bodies and no toxin, and is environmental friendly and low in cost. The tungsten-removing treatment method comprises the following technical steps of: washing the tungsten carbide work, clamping, preparing electrolyte, removing a coating and washing.

Description

technical field [0001] The invention relates to the technical field of tungsten stripping treatment methods, in particular to a tungsten stripping treatment method for tungsten carbide workpieces. Background technique [0002] After the tungsten carbide steel body is used in service, the tungsten carbide sprayed on the surface needs to be removed again, so that the workpiece can be repaired and sprayed again for use. However, because the surface hardness of tungsten carbide can reach about HV1400, the body is too hard. (including cutting and grinding) it is difficult to remove the tungsten carbide on the surface. In the past, people usually used chemical tungsten removal method, that is, hydrofluoric acid, nitric acid, hydrochloric acid, etc. were used to react with the workpiece to remove tungsten. It can cause chronic poisoning, rhinitis, bronchitis, emphysema, etc., and some allergies, dermatitis, eczema, etc. Hydrochloric acid is extremely volatile, and water vapor in t...

AI Technical Summary

Problems solved by technology

[0002] After the tungsten carbide steel body is used in service, the tungsten carbide sprayed on the surface needs to be removed again, so that the workpiece can be repaired and sprayed again for use. However, because the surface hardness of tungsten carbide can reach about HV1400, the body is too hard. (including cutting and grinding) Difficult to remove surface tungsten carbide

In the past, people usually used chemical tungsten removal method, that is, hydrofluoric acid, nitric acid, hydrochloric acid, etc. were used to react with the workpiece to remove tungsten. It can cause chronic poisoning, rhinitis, bronchitis, emphysema, etc., and some allergies, dermatitis, eczema, etc. Hydrochloric acid is extremely volatile, and water vapor in the air can react with it to form hydrochloric acid mist and Hypochlorous acid is easy to corrode objects, endangers human body, animals and plants, and has a destructive effect on the surface of workpieces. For example, when hydrofluoric acid, nitric acid, and hydrochloric acid are used for tungsten stripping, tungsten carbide workpieces are often corroded

In addition, tungsten can also be removed by sandblasting, but this method is too costly, and the tungsten carbide sprayed on the bottom groove and contour of the workpiece cannot be removed