Method for delamination of ceramic hard material layers from steel and cemented carbide substrates

Abstract

In order to improve a method for decoating of ceramic hard material layers from steel and cemented carbide substrates having a ceramic hard material layer on part of the surface thereof and to make it amenable to further applications, it is proposed that the workpieces () to be decoated be inserted—preferably with a part thereof without a ceramic hard material layer—into guard elements, preferably protective plugs, which fit in diameter and height, and be pressed into a holder (), the holder with the workpieces () to be decoated be contacted with the plus pole of the current pulse driver, an either acidic or basic electrolytic bath be selected, the contacted holder be placed into the selected electrolytic bath (), at least one electrode () be positioned at a predetermined distance from the holder and the latter be contacted with the negative pole of the power pulse generator (), the decoating is performed by means of the current pulse driver, with endpoint detection being performed continuously or a control for decoating being conducted at time intervals.