Process and apparatus for heat treatment of steel material such as of soft steel or the like
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United States of America Patent
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May 28, 1985
Issued Date -
N/A
app pub date -
Dec 29, 1983
filing date -
Jul 21, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process and apparatus for heat treatment of a steel article made of soft steel or the like comprising heating the steel article to a brazing temperature of 1100.degree.-1200.degree. C., then cooling the steel article in a furnace to a temperature of about 570.degree.-720.degree. C., and thereafter rapidly cooling the article. The article is heated to brazing temperature in an oxidation-free atmosphere and is also cooled in an oxidation-free atmosphere. The article can be rapidly cooled by contact with a surface pretreatment solution.
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