Experimental and Computational Study of Induction Surface Hardening

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Experimental and Computational Study of Induction
Surface Hardening
Jiahorn Wu wujiaho_at_iit.edu T. Calvin
Tszeng tszeng_at_iit.edu Philip Nash
nash_at_iit.edu
Aug 29, 2003
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Advantages of Induction Heat
Treating

• Induction heat treating is effective for surface
  hardening, through hardening, tempering, stress
  relieving, annealing and normalizing.
• Induction heat treating can be performed in a
  very short time, with extremely high efficiency.
• High productivity.
• Less distortion.
• A clean working environment.

Fig.1 From Inductoheat
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Plan of work

• Simulating agreement between thermal couples
  temperature history and computational results.
• Further validation will be verified by
  microstructures and dilatometry test.
• Control of case depth by induction heating power.

Fig.2 From Inductoheat
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Experimental setting
Fig 3 Lepel induction machine ModelT-30-3-KC-SW
Volt230V AMP180A Cycle60
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Workpiece layout
Fig.5 Top surface
Fig.3 workpiece setup
Fig.4 FEM objects
Fig.6 Buttom surface
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Computational FEM Mesh
Simulation conditions Frequency30K
Hz Current250-280 A
Fig.7 Customized FEM mesh
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Experimental results
Fig. 8 Temperature History
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Computational Results
Fig. 9 Computational Temperature History
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Experimental Vs. Computational Results
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Heating Power Density
Fig. 10 Heating Power Density ( 4 sec.)
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Fig.11 Heating Power Density ( 24 sec. )
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Magnetic Field Profile
Fig. 12 Magnetic Field Profiles
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Work In The Future

• More accurate thermal electromagnetic
  properties is required.
• Valid computational results will being made
  through compare with hardness, microstructure
  and dilatometry
• data.
• Newly reliable induction machine is helpful in
  further accurate experiments.

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• THANK YOU!