homogeneous austenitic structure.
Heat Treatment 1: Rapidly cool to 650\deg C, hold for 5 seconds, rapidly cool to 400\deg C,
hold for 100 seconds, quench to room temperature.
Heat Treatment 2: Rapidly cool to 600\deg C, hold for 800 seconds, rapidly cool to
500\deg C, hold for 200 seconds, quench to room temperature.
Heat Treatment 3: Rapidly cool to 610\deg C, hold for 2 seconds, rapidly cool to 500\deg C,
hold for 1000 seconds, quench to room temperature, reheat to 690\deg C for 20 hours, cool
to room temperature.
Heat Treatment 4: Rapidly cool to 450\deg C, hold for 40 seconds, quench to room
temperature.
Heat Treatment 5: Rapidly cool to room temperature, reheat to 400\deg C for 30
minutes, quench to room temperature.