Locally Austempered Ductile Iron (LADI) 2010-01-0652
There are numerous component applications that would benefit from localized austempering (heat treating only a portion of the component) for either improved wear properties or fatigue strength. Currently available methods for “surface austempering” of ductile iron are often expensive and not as well controlled as would be desired. This study was undertaken to find a better process. Locally Austempered Ductile Iron (LADI) is the result of those efforts.
LADI is a surface hardening heat treatment process that will produce a localized case depth of an ausferrite microstructure (ADI) in a desired area of a component. This process has been jointly developed by Ajax Tocco Magnethermic Corporation (ATM) and Applied Process, Inc.- Technologies Division (AP) with support and collaboration from ThyssenKrupp Waupaca, Inc. (TKW). This paper describes the outcome of using this patent pending process (US #65/195,131).
Christopher A. Bixler, Kathy L. Hayrynen, John Keough, George Pfaffmann, Scott Gledhill
Applied Process Inc., Ajax TOCCO Magnethermic, ThyssenKrupp Waupaca Inc.
SAE 2010 World Congress & Exhibition
SAE International Journal of Materials and Manufacturing-V119-5, Advances In Light Weight Materials – Aluminum, Casting Materials, and Magnesium Technologies, 2010-SP-2294, SAE International Journal of Materials and Manufacturing-V119-5EJ