Heat Treating Hints^sm
© 1995-2009
The Herring Group, Inc.

Heat Treating Hints^sm is one of our ways of sharing knowledge with the Industry we love. This is a changing series of technical articles which will be updated every month, and is designed to inform and educate. We cover a wide range of subjects extracted from our vast library of technical knowledge.

“The Heat Treat Doctor” presents…

Technology Trends in Vacuum Heat Treating - Part Three

Part Three of this three part series focuses on new technologies and future developments in vacuum heat-treating. Technologies include such areas as rotational compression brazing of rocket engine nozzles, beta annealing of aerospace alloys (BASCA Process), low-pressure vacuum carburizing and carbonitriding and high temperature vacuum sintering/hardening. Looking forward, critical technologies in the biomedical, aerospace, electronics, optical, and automotive industries will take advantage of these energy saving and environmental (green) friendly technologies.
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Peak Shaving

Natural gas is a vital commodity that is at the heat of most heat treat processes. Yet do we really understand what makes up this fuel, how it is changing based on supply and demand pressures and how it is and will be delivered to us? Peak shaving is explained, the properties of aerated propane presented and control issues discussed in such a way as to allow the average heat treater to understand what he must do to compensate for these changes over time.
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Heat Treatment of Titanium and Titanium Alloys

Titanium usage is increasing in part due to the demands of new aircraft and there is renewed interest in learning about the various heat-treating processes for these titanium alloys. In addition, the practical considerations needed to control process and equipment variability in real world applications is presented.
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Ideal Diameter

Ideal diameter is an excellent means of comparing the relative hardenability of two materials as well as determining if it is possible to harden a particular cross section (or ruling section) of a given steel. DI values are discussed from the standpoint of hardenability, grain size and quench severity. A method for calculating DI values is also presented and explained.
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Generic and practical information is presented on this Website and in these downloadable files.  It is not intended to replace or supplement federal, state, and local codes, government standards, insurance requirements, company policies and procedures, or common sense. In addition, all equipment manufacturers’ instructions and operating and maintenance manuals should always be thoroughly read and followed. Further, personnel training should be provided unequivocally to everyone who will be associated with operating such equipment. It is the responsibility of the individual downloading this information to pass along these and other warnings as appropriate prior to the use of the material. The Limit of Liability Statement found elsewhere on this Website applies to this information.

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