Continuous heat treatment furnace and utilizing the same, metal tube and heat treatment method
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United States of America Patent
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Feb 4, 2014
Grant Date -
Jun 24, 2010
app pub date -
Dec 31, 2009
filing date -
Jul 25, 2005
priority date (Note) -
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Abstract
A continuous heat treatment furnace is provided in which an atmosphere-control gas is introduced to a heating chamber having a heating zone, metal tubes are continuously charged along an axial direction from a furnace entrance, and the metal tube subjected to a heat treatment is taken out from a furnace. The continuous heat treatment furnace includes a front chamber which has a preheating zone on an entrance side of the heating chamber and seal curtains which are located on an entrance side and an exit side of the front chamber.
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