Subzero

Subzero literally means "beneath zero." As such, it is usually used for negative numbers, especially with regards to temperature.

Sub-Zero Treatment, also known as cryogenic treatment, utilizes ultra-cold temperatures to modify the micro-structure of metals and other materials. It is part of heat treating operations in manufacturing processes. This process requires temperatures of at least -120°F to begin. For deep sub-zero treatment the parts must cooled to -300°F where they are held for relatively long periods of time and then slowly warmed back up. This treatment has many benefits including:
*Improved stress relief
*Better dimensional stability
*More uniform structural stability
*Improved wear resistance
*Useful technique for shrink fitting

This type of heat-treating production has been widely accepted as a cost reduction process and performance enhancing technology. [http://www.nitrofreeze.com/cryogenictreatment.html] [ [http://www.specialtyheat.com/subzero.asp Sub Zero Treating Services ] ] [ [http://www.linde-gas.com/international/web/lg/com/likelgcom30.nsf/docbyalias/ind_subzero Sub-Zero Treatment - Industry Know-how > Heat Treatment | Linde Gases Division ] ]

Subzero can also mean:

In popular culture:
*Sub-Zero (Mortal Kombat), one of the characters from the video game series "Mortal Kombat".
** Noob Saibot, a hidden character introduced in "Mortal Kombat II" and later established as the original Sub-Zero from the first "Mortal Kombat" and the older brother of the current one.
**"", a spin-off video game.
*Subzero (horse), a racehorse that won the 1992 Melbourne Cup.
*Sub Zero (television), a television gameshow for children produced by the BBC.
* Subzero (band), a "metalcore" band under the Stillborn Records label.
*"", an animated 1998 movie.
* One of the "stalkers" from the movie "The Running Man".

As a title:
*Sub-Zero Refrigerator, a refrigerator brand name.

References