802 Каталог GUHRING 2016 Режущий инструмент для обработки наружной и внутренней резьбы Стр.790

Каталог GUHRING 2016 Режущий инструмент для резьбы Стр. 790 0802 Lab2u

Technical section SURFACE TREATMENT AND COATINGS FOR THREADING TOOLS Bright surface finish Our high speed steel or own carbide production tools offer good basic characteristics for the machining of various materials. Steam tempered surface finish When steam tempering, the border zones of steel surfaces are chemically modified in the jm range, thereby developing a crystalline iron oxide coating (3-10 jmm). These surfaces improve the reactional behaviour of the tools. Thanks to this surface transition the lubricant / coolant adheres better to the tool. This procedure is normally applied for the machining of carbon steel that tends to develop built up edges and cold welding at low cutting speeds. An additional nitriding of bright tools ensures an increased hardness of the surface thanks to the incorporation of nitrogen which also makes abrasive applications possible. TiN-coating Max. application temperature: < 600° C Colour: Yellow gold Hardness: 2300 HV0.05 The TiN-coating, introduced by Guhring in the early 1980’s displays, especially in thread production, good performance characteristics, in this area it is applied as proven broad band coating. TiCN-coating Max. application temperature: < 600° C Colour: Grey violet Hardness: 3000 HV0.05 An additional incorporation of carbon increases the toughness and hardness of TiCN and possesses a lower friction coefficient than the TiN-coating. Thanks to its wear-resistance it is especially suitable for abrasive applications. 790 GUHRING