Heat Treating Hintssm
© 1995-2009
The Herring Group, Inc.
Heat Treating Hintssm 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…
Endothermic
Gas Generator Maintenance & Safety Checklist
Maintenance
of an Endothermic gas generator is critical to the operational
success of the heat treat department,
and as essential as on any furnace or piece of machinery in the
manufacturing operation. The maintenance of this unit is a team
effort between the Heat Treater and maintenance department. It
is strongly recommended that a detailed log be kept of not only
the maintenance performed, but the operational condition based
on a daily review of the generator performance. The Heat Treater
is the first line of defense in helping to spot and track changes
in generator performance. This checklist will help.
Download
the Adobe PDF to learn more.
Cleaning
of Fasteners Before & After Heat Treating
Many fastener heat treatment operations must deal with poorly
cleaned parts. This is especially
challenging with respect to controlling the furnace atmosphere
and also results in higher than normal equipment maintenance.
While most atmosphere heat treat processes can tolerate some degree
of wet or oily parts, there is no excuse for not taking the time
to understand how to better clean these products.
Download
the Adobe PDF to learn more.
Consideration in Heat Treatment - Part One: Types & Purpose
of Furnace Atmospheres
A
critical consideration in heat treatment is the type, consistency
and control of the furnace atmosphere. The
article discusses the purpose of a furnace atmosphere and how
it must vary to achieve the desired end result. A technical explanation
of the types and uses of the various furnace atmospheres is provided.
Download
the Adobe PDF to learn more.
Consideration in Heat Treatment - Part Two: Furnace Atmosphere
Control
The composition
of the furnace atmosphere is dynamic and constantly changing,
so we must use measurement and
control devices to ensure good quality control. In particular,
for atmospheres designed to run "neutral," that is,
provide a stable platform for enriching gas additions or to avoiding
decarburization and/or carburization. This is accomplished by
making sure that one or several of the following control methods
is monitoring and/or controlling the process: (a) dew point analysis;
(b) infrared analyzer (single- or multiple gas analyzers); (c)
oxygen (carbon) probes and (d) shim stock analysis.
Download
the Adobe PDF to learn more.
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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