Method for directly enameling steel parts using a single enamel coating
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United States of America Patent
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Nov 17, 1987
Issued Date -
N/A
app pub date -
May 27, 1986
filing date -
Jan 11, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns a method for firing enamel on steel parts, especially on steel sheet of aluminum stabilized continuous cast steel material, as well as an enameling oven with a firing zone and an entry zone serving as a prewarming zone for the carrying out of this process. The invention is characterized in that the heating of the steel part or steel sheet to the firing temperature is interrupted before reaching the firing temperature, in that hydrogen dissolved in the steel is released during the interruption time, that the steel part subsequently is heated further to the firing temperature, is held at this temperature and is then cooled in a known way. The enameling oven for carrying out the method consists according to the invention of a degasing zone inserted between the firing zone and the prewarming zone, in which degasing zone the workpiece coated with enamel is held for a given minimum time at a definite temperature.
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