Drilling WALTER TITEX Surface treatments and hard material coating for increasing performance Surface treatments Steam treatment of tools made fr

Drilling WALTER TITEX Surface treatments and hard material coating for increasing performance Surface treatments Steam treatment of tools made from HSS Implementation Dry steam atmosphere, 520 to 580 °C Nitriding of tools made from HSS Implementation Treatment in media giving off nitrogen, 520 °C to 570 °C Effect Adherent oxide layer consisting of Fe3O4 approx. 0.003 to 0.010 mm deep Effect Enrichment of surface with nitrogen and partially with carbon Property low tendency towards cold welding increased surface hardness and therefore improved wear resistance increased corrosion resistance improved sliding properties due to better lubricant adhesion as a result of FeO crystals Reduction in grinding stress Property low tendency towards cold welding and built up edges increased hardness and therefore more wear resistance Hard material coatings Surface coating has developed into a proven technology for improving the performance of metal cutting tools. Unlike surface treatment, the surface of the tool is not chemically altered, but a thin coating is applied. With Walter Titex tools made from high-speed steel and carbide, PVD processes are used for coating which operate at process temperatures of less than 600 °C and therefore do not change the basic tool material. Carbide coatings are harder and more wear-resistant than the cutting tool material itself. Also they separate the cutting tool material and the material that is going to be cut from each other they act as a thermal insulating layer This improves the service life of the coated tools, and increases the cutting speed and the feed rate at the same time. Surface treatment/ coating Process/coating Property Example tool uncoated No treatment Steam oxide Steam treatment Universal treatment for HSS Oxide margin Steam treatment Universal treatment of lands for HSS TiN coating Universal coating TIP TiN Point coating Special coating for optimum chip evacuation TFL Tinal coating High-performance coating with wide application area TFT Tinal TOP coating High performance coating with particularly low friction TFP Tinal Point coating High-performance coating for optimum chip evacuation TTP Tinal TOP Point coating High-performance coating with particularly low friction TML Tinal microcoating Special coating for small drills with extremely low friction XPL AlCrN coating High-performance coating for maximum wear resistance DPL Double coating High-performance coating for maximum wear resistance DPP Double point coating High-performance coating for maximum wear resistance AML AlTiN microcoating Special coating for small drills with extremely low friction AMP AlTiN micro-Point coating Special coating for small drills with extremely low friction B 393 Technical information