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One Minute Mentor: Isothermal Transformation Diagram for Tool Steels

Isothermal Transformation Diagram for Tool Steels

The graph shows the isothermal transformation diagram for the steel AISI 1075/DIN EN C75. Cooling curves  show three process cycles for molten metal quenching in the time-temperature-transformation plots:

  • Ms: martempering to produce circular or band saws, flapper valves, or springs
  • Bai: austempering to produce cutting dies, leather and paper cutting tools, and on parts for cars
  • P: patenting to produce a ready-to-roll strip for seat belt springs or cable springs

Volume 4D, Heat Treating of Irons and Steels -> Tool Steels ->  Processes and Furnace Equipment for Heat Treating of Tool Steels -> Equipment for Austenitizing, Quenching, and Tempering of Tool Steels

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