Presentation on theme: "Nitriding Team Nitriding"— Presentation transcript:
1 Nitriding Team Nitriding The diffusion of nitrogen into the surface layers of low carbon steels at elevated temperature. The formation of nitrides in the surface layer creates increased mechanical properties.Team NitridingBeth Blumhardt – Brent Fogal – Greg Mooren – Jana Young
2 Nitriding Introduction Benefits of Nitriding Types of Nitriding Future of NitridingProcess DeterminationCVD ReactionDeposition ProcessDiffusion DepthProcess ResultsIntroduction
3 Nitriding Benefits Principal Reasons for Nitriding are: Obtain High Surface HardnessObtain a Resistant SurfaceIncrease Wear ResistanceIncrease Tensile Strength and Yield PointImprove Fatigue LifeImprove Corrosion Resistance(Except for Stainless Steels)Benefits
5 ***Lots of more nitriding methods for specific applications*** Process methods for nitriding include:GasLiquidPlasmaBrightPack***Lots of more nitriding methods for specific applications***
6 Gas Nitriding Gas methods: Case-Hardening Process Nitrogen IntroductionSurface of a Solid Ferrous AlloySuitable TemperatureBetween 495 and 565°C (for Steels)Nitrogenous GasAmmonia
7 Liquid Nitriding Liquid nitriding: Thermo-chemical Diffusion Treatment Hardening Components With Repeatability. Salt Bath, at Less Critical Temperatures.Preserves Dimensional StabilityCorrosion ProtectionExhibit Long-Term Resistance to Wear, Seizure, Scuffing, Adhesion and Fatigue.
8 Plasma Nitriding Set-Up Process Vacuum ChamberPressure = 0.64 PaPre-Heat CycleSurface CleaningIon BombardmentControl Gas FlowN, H, CH4Ionization by VoltageBlue-Violet GlowWear Resistant LayerSet-UpProcess
9 The Future of Nitriding Replacing Liquid NitridingEnvironmental EffectsEase of ControlMore Complex SubstratesPerformed at Lower TemperaturesCreates Higher Residual Stress <PLASMA / ION NITRIDING
10 Problem Statement Gas Nitriding How do the variables of nitriding steel affect the process and the mechanical properties of the surface?The following variables were investigated:TimeTemperatureGas VelocityDevelop Process Model
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