Duplex Process

duplex process

[′dü‚pleks ‚präs·əs]
(metallurgy)
A two-step procedure in which steel is refined by one process (usually the Bessemer process) and finished by another process (usually open-hearth or electric-furnace). Also known as duplexing; duplex practice.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Duplex Process

 

in metallurgy, a steel-making process that is carried out in two successive steel-melting units (the process is sometimes also used to smelt cast iron, beginning in a cupola furnace and ending in an electric furnace).

The duplex process, which was first used in the second half of the 19th century, makes possible more efficient use of various units. For example, the duplex process using a basic open hearth furnace and an arc furnace or a converter and an arc furnace is used to increase the output of the electric furnace (that is, to increase the output of high-quality steel) and to reduce the specific consumption of electric power, which is accomplished by removing from the electric furnace such operations as the melting of the charge and the partial refining of the metal; in the duplex process, only the final refining and deoxidation of the steel are carried out in the arc furnace. The application of the duplex process is limited.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Typical would be the customisation of PVD coatings, along with low-friction Carbon thin films, such as WCC-H and DLC, and a recently developed duplex process called Nitron 100 for titanium alloys and stainless steels.
Using a duplex process, the base metal can first be hardened by the diffusion of nitrogen into the surface.
These include PVD coatings, along with low friction carbon thin films, such as WCC-H and DLC, and a recently developed duplex process called Nitron 100 for titanium alloys and stainless steels.
Forcing nitrogen into the surface by the high-energy techniques used in ion implantation compresses the |lattice' so that the duplex process delivers dramatic improvements in wear and corrosion resistance.