Обший каталог Yamawa 2016 - 2017 - страница 828

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19. Surface Treatment Description of products ■Hard coating 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 (TiN) Titanium carbonitride (TiCN) Titanium nitride aluminum 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 Color Gold Blue Dray 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 Number of tapped holes Work piece : Ck45 (213~222HB) Number of tapped holes Work piece : Aluminum alloy Hole size : 5mm         die casting (Si = 12%) Tapping Length : 14mm (through hole) Hole size : 5.54mm Cutting Speed : 30m/min Tapping Length : 14mm (through hole) Fluid : Water Soluble cutting oil Cutting Speed : 15m/min Machine : CNC tapping machine Fluid : Water Soluble cutting oil Machine : CNC tapping machine Technical Information F-SL design F-SL N-RS design N-RS design (Bright) (TiN coated) (Bright) (TiCN coated) Technical-53 824