Общий каталог Yamawa 2022 - 2023 - страница 1211

19. 19. Surface Treatment Description of products High speed cutting and hard-to-machine material cutting are the recent technology. To meet this tendency, the hard layer coating by vapor deposi- tion over tool's surface has become popular. There are two coating methods, CVD and PVD. PVD is mainly used for tap. ■Physical Vapor Deposition ○Inside of the container of high vacuum, are vapor deposition materials heated. And we vapor-deposit particles ionized by electric discharge on tool's surface. ○Due to its low reaction temperature (lower than 500˚C), PVD makes little change in shape and hardness of HSS tools. ○We have adopted iron plating method, and are coating thin layer (1-4um) over our HSS and carbide tools. The layer processed by this method is very high in its adherence and its wear resistance. ■The features and classification of coating Classification Titanium nitride aluminum Titanium nitride (TiN) Titanium carbonitride (TiCN) Chromium nitride (CrN) Features (TiAIN) Vickers Hardness Wear resistance Good Excellent Excellent Normal Welding resistance Good Good Good Excellent Heat resistance Good Normal Excellent Excellent Acid resistance Good Normal Excellent Good Slippery Good Excellent Good Excellent Blue Dray Color Gold Violet Silver Violet Carbon Steels Carbon Steels Stainless Steels Copper Aluminum forging Hard Steels Cast Irons Workpiece materials Stainless Steels Aluminum forging Cast Irons Brass・Bronze Note: Evaluation (tri-level) of characteristic features is just comparative of these four coatings, TiN, TiCN, TiAlN, and CrN, in the table. These coatings have great advantages of wear resistance, welding resistance, and friction reduction. The values of vickers hardness are also higher than the heat treatment or nitriding of HSS cutting tools from the table. ■Comparison between bright and TiN coated ■Comparison between bright and TiCN coated Tapping condition Tapping condition Tap : F-SL P2 M6×1 Tap : N-RS G7P M6×1 Work piece : S45C (213~222HB) Work piece : ADC12 Number of tapped holes Number of tapped holes Hole size : φ5mm Hole size : φ5.54mm Tapping Length : 14mm (through hole) Tapping Length : 14mm (through hole) Cutting Speed : 30m/min Cutting Speed : 15m/min Fluid : Water Soluble cutting oil Fluid : Water Soluble cutting oil Machine : CNC tapping machine Machine : CNC tapping machine Information Technical F-SL design F-SL N-RS design N-RS design (Bright) (TiN coated) (Bright) (TiCN coated) Technical-60