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1 A D V A N C E D M A T E R I A L S & P R O C E S S E S | F E B R U A R Y / M A R C H 2 0 2 0 3 3 UNDERSTANDING AND OPTIMIZING NITROGEN- HYDROGEN FURNACE ATMOSPHERES FOR ANNEALING LiangHe, Thomas Philips, Donald J. Bowe, Guido Plicht, andMark K. Weise Proper specification, measurement, and control of annealing furnace atmospheres are critical to reduce sooting, oxidation, sticking, and distortion. EDITORIAL OPPORTUNITIES FOR HTPro IN 2020 The editorial focus for HTPro in 2020 reflects some key technology areas wherein opportunities exist to lower manufacturing and processing costs, reduce energy consumption, and improve performance of heat treated components through continual research and development. May/June Testing & Process Control September Thermal Processing in On/Off Highway Applications November/December Atmosphere & VacuumHeat Treating To contribute an article to one of the upcoming issues, contact Vicki Burt at vicki.burt@ asminternational.org . To advertise, contact kelly.johanns@ asminternational.org . DEPARTMENTS 1 2 | EDITORIAL 1 4 | HEAT TREATING SOCIETY NEWS ABOUT THE COVER Surfacemicrostructure of 52100 steel sample after being held at 850°C for 80minutes wet N 2 atmosphere, dewpoint = -4°C . VACUUM CARBURIZATION OF A TRANSMISSION SHAFT M.A. Delgado-López,R. Colás, and V. Esteve Tests conducted on vacuumcarburized and quenched shafts identify variables that increase distortion and themagnitude of residual stresses. EDITOR Victoria Burt TECHNICAL ADVISORS HTS R&D Committee PRODUCTIONMANAGER Kelly Sukol NATIONAL SALESMANAGER Kelly Johanns 440.318.4702 kelly.johanns@asminternational.org HEAT TREATINGSOCIETY EXECUTIVE COMMITTEE Eric L. Hutton, President James P. Oakes, Immediate Past President Lesley Frame, Vice President HTPro is published quarterly by ASM International®, 9639 Kinsman Road, Materials Park, OH 44073, 440.338.5151, asminternational.org. Vol. 8, No. 1 Copyright ©2020 by ASM International®. All rights reserved. The acceptance and publication of manuscripts in HTPro does not imply that the editors or ASM International accept, approve, or endorse the data, opinions, and conclusions of the authors. Althoughmanuscripts published in HTPro are intended to have archival significance, authors’ data and interpretations are frequently insufficient to be directly translatable to specific design, production, testing, or performance applications without independent examination and verification of their applicability and suitability by professionally qualified personnel. 11 8