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1、HSS30GPa结合力：结合力：60N5mmWC球，球，40N加载，加载，200mm/s,1小时无明显小时无明显磨损磨损与与TiN比，比，CrTiAlN钻孔钻孔数可多数可多1倍左右倍左右CrTiAlNCrTiAlNWorkpiece Material: Plain Carbon Steel (EN9) 190 HVTool: Tungsten Carbide Drills (6.4 mm )CoatingNumber of HolesCrTiAlN328Uncoated 73185rpm (64m/min) & 0.30mm/rev lubricated: 7.5% oil concentra
2、ted water based coolantHoles: Through (19mm deep)Drilling PerformanceDrilling PerformanceCrTiAlNCrTiAlNWorkpiece Material: Alloy Steel EN24 363HVTool: High Speed Steel (1/4” drills) Holes: Through (12.6 mm deep)2440rpm (48.7m/min) & 0.11mm/rev & 268mm/min lubrication: 7.5% oil concentrated water bas
3、ed coolantCoatingNumber of HolesCrTiAlN232Uncoated 0Drilling PerformanceDrilling PerformanceCrAlTiN Cr/Ti在相当宽范围在相当宽范围 内稳定的硬度、结合力内稳定的硬度、结合力 PoD, 5 mm WC/Co ball, 200 mms-1CrTiAlN Cr/Ti在相当宽范围在相当宽范围 内稳定摩擦磨损性能内稳定摩擦磨损性能 Drilling Speed:4050 rpm, (equivalent to 80m/min) Feed: 945mm/min Conditions: Through
4、hole, 20mmCoolant: Cimstar MB603, 5%, Drill testSamplesOne foldTwo foldThree foldCrAlTiCr Coating Deposition- CFUMSIP - 1 Ti, 1 Al, 2 Cr- Ar- N2 OEM control loopDeposition ProcessCrTiAlN多层膜多层膜复合的方法除多复合的方法除多元外可形成多层，元外可形成多层，层厚可降至纳米，层厚可降至纳米，成为成为纳米调幅结纳米调幅结构。构。TiN/NbN多层多层5nmCrTiAlNCrTiAlN 镀程序镀程序 CrNCrTiA
5、lNSubstrate高速钢基体高速钢基体1200 目抛光目抛光Cr bond layer0.2 m Cr底层底层Graded layer0.3 m CrTiAlN梯度层梯度层Nanolayers4 m CrTiAlN多层多层, ,其中其中10nm 15nm, CrN层层 6.0nm25nmQuelle: A: Matthews, University of Hull, UKA. Matthews, University of Hull, U.K.Fracture Toughnes of a single- and multi- layer Multilayers with a modulat
6、ion of elastic moduli hinder the cracks propagation65%Ti，35%Al的TiAlN和WC形成调幅结构，波长为10-20nm在TiN的底层上沉积TiAlN/WC白色为TiAlN黑色WCRenucleation at the incoherent interfaceTiN+AlTiN和CrN+TiN调幅周期与硬度理论曲线Buffer layer decreases residual stressBuffer thickness on scratch results摩擦系数和层数关系 多层的摩擦模型Surface and Coatings Tec
7、hnology 163 .164 (2003) 571.577Cr+CrN层薄，磨损量低MonoMulti纳米晶超硬膜纳米晶超硬膜纳米复合纳米复合超硬膜结超硬膜结构示意图构示意图纳米晶与纳米晶与非晶结构非晶结构纳米复合纳米复合TiN晶粒尺寸与硬度关系晶粒尺寸与硬度关系Ti-Cu-N多元膜中Cu%与硬度关系由于形成纳米复合结构，软金属加入也可由于形成纳米复合结构，软金属加入也可提高硬质膜硬度提高硬质膜硬度Grain size vs. Cu% in Ti-Cu-NTiN199719931990PVD Coating Development19851987TiCN, CrNTiAlNWC/C and
8、 MoS2C and DLC (new generation)2000TiAlSiN, super-lattice Hard Coatings: (TiN, TiCN, CrN, TiAlN,.)uUses: cutting and forming applicationsuLess efficient : Wear ProtectionuWhy?: High , abrasive due to hardness and surface roughnessDLCuProperties: Hard, lower friction. mechanical component application
9、suUses: low since the coatings introductionuProblems:uHardness brittlenessuLow adhesion level load bearing capacity limitedHard coatingsLubricant coatingsMe-CHProperties: Less hard, less brittle, very good adhesion, medium load bearing capacity, low friction ( 0.15).Self-Lubricants Based on MoS2(MoS
10、T) and C (Graphit-iC)uWear protection: Necessary to use a true solid lubricant to enable the protection of the opposite surface by formation of a transfer layer. uUses:MoS2: vacuum only, low loaduUses: Graphite: used in most water based lubricant, not suitable in vacuumuProperties:A1- Low friction coefficient 2- Hardness Low wear rateB1- Hardness 2- adherence Load bearing capacity
