Soğuk Dövmede Kullanılan Yüzey İşlem Metotları

Pre-treatment and coating stages of raw material are essential applications for cold forging. The quality of the pre-treatment affects the adhesion, appearance, and corrosion resistance of the coating. Accordingly, the material flow during forging is also highly affected. Successful cold forging operation is closely related to an efficient raw material coating operation and the most common coating system is zinc-phosphate coating. Recently, zinc-phosphate coating has been accepted as an environmentally dangerous coating type. The most promising alternative of zinc-phosphate coating is polymer coating. Polymer coating is an environment-friendly coating method that can promote lean production, low operating costs and stocks and higher profitability. In this study, raw material pre-treatment and coating methods used in cold forging were examined. Moreover, the surface qualities of bolt samples produced with polymer coated after sandblasting raw materials and zinc-phosphate coated after acid cleaning raw materials were studied. The forging performance of the polymer coating, which is a more environmental-friendly method, has been found to be similar to that of the conventional method, the zinc-phosphate coating.