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Heat Treating Steel. By: Louie Mysse Brandon Okerlund. Heat Treatment Processes. Tempering Annealing Stress Relieving Normalizing Quenching. Tempering. Reheating a Hardened Material Increases Ductility and Toughness Three Components Temperature Time Cooling Rate. - PowerPoint PPT Presentation
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Heat Treating SteelBy: Louie Mysse Brandon Okerlund
TemperingAnnealingStress RelievingNormalizingQuenching
Heat Treatment Processes
Reheating a Hardened Material Increases Ductility and ToughnessThree ComponentsTemperatureTimeCooling RateTempering
Heating and holding a suitable temperature followed by an appropriate cooling rate.Quenching has to occurProduces desirable changes in the material properties or microstructure
Annealing
Relieves stresses that remain locked in a structure as a consequence of a manufacturing sequenceWeldingCutting with a torchMachiningStress-Relief
Both Thermal and Microstructure point of viewThermalHeating then cooled in still or slightly agitated air
Normalizing
Rapid cooling of steel from an elevated temperatureTypical Quenching techniquesWaterOilAir
Quenching
What is the hardness required?Refer to Heat Treaters GuideHow Deep do You Need the Treatment?CaseThroughWhat type of Heat Treatment is required?Tempering, Annealing, Stress-Relief, Normalizing, Quenching
How To Heat Treat In Shop
Turn On FurnaceSet To Appropriate TemperatureDetermine from referencesPlace Metal In Furnace When Up to TemperatureLeave for determined timeRemove and Immediately Quench Quench in appropriate fluidOil, Water, AirRe-Set Furnace Temperature (Tempering)Place Metal Back in Furnace (Tempering)Leave for determined timeRemove and Cool at Designated Rate (Tempering)How To Heat Treat In Shop
Sample Annealing Video
Establish the type of steel that will be usedDetermine the desired propertiesHardnessCase/ThroughChoose the proper quenching technique
Ordering Heat Treating Processes
Metals Handbook Desk Edition, Second Edition.JR Davis, Davis and Associates, 1998, ASM InternationalSteel Aluminum Stock List and Reference Book,Jorgensen Steel, Earle M. Jorgensen Co., 1998. (Section S.)
References