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This proceedings provides the latest knowledge and information on scientific advances, technology innovations, industry trends, and commercial practice in heat treating, with contributions from leading international experts. Papers address the latest state-of-the-art in heat treating materials, processes, products, equipment, methodology, and quality control. The Heat Treating Society 2011 Conference was designed around a Heat Treat University theme, with papers addressing fundamentals through emerging technologies. Subjects addressed in-depth include quenching and control of residual stresses, induction heating, gear heat treatment, vacuum technology, atmosphere technology, heat treat manufacturing advances, heat treating of aluminum, microstructure evolution, surface hardening, and many more.

The second article in this series looks at materials testing, microstructural evaluation, mechanical testing, and residual stress and distortion using the DANTE Controlled Gas Quenching process.

The DANTE heat-treatment-simulation software package is available from Deformation Control Technology Inc. It is a finite-element-based tool that can be used to predict metallurgical phase transformations, dimensional changes and the stress state of steel hot forgings as a consequence of cooling practices. The surface and internal temperatures of a hot-forged shape change in accordance with surface heat loss.

Distortion developed during the heat treatment of steel parts is a common and expensive problem. No universally applicable solution has yet been developed even though heat treaters have identified many sources of distortion and devised a variety of empirical rules-of-thumb to help minimize it. Traditionally, distortion problems hagve been addressed through a variety of corrective measures, each of which increases manufacturing costs. To address the problem of heat treat distortion, a collaborative program was initiated to examine a subset of distortion sources for a very common heat treating process: immersion quenching of carburized, low-alloy steel parts. The project was sponsored by the Manufacturing Technology Directorate, Wright Laboratory (WL/MTX), Air Force Material Command, Wright-Patterson Air Force Base, Ohio, under cooperative agreement award F33615-96-5619 to the National Center for Manufacturing Sciences Incorporated (NCMS), Ann Arbor, Michigan. (Example materials include steel 5120 gear.)