Stainless steel parts with suppressed release of sulfide gas and method of producing
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United States of America Patent
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Sep 21, 2004
Grant Date -
Nov 21, 2002
app pub date -
Apr 30, 2002
filing date -
Jul 26, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed are stainless steel parts, particularly, parts of electronic apparatus, with which troubles caused by so-called 'sulfide gas' mainly of H.sub.2 S must be avoided. Release of the sulfide gas from the parts is effectively suppressed. The parts have high hardness and corrosion resistance, and can be produced with high finishing accuracy. The stainless steel parts are produced by processing a ferritic or a martensitic stainless steel of a specific alloy composition by forging and/or machining to the shape of the part followed by quenching and tempering, or quenching and tempering followed by machining to the shape of the part, and applying a solution of oxidative acid to the surface of the part so as to dissolve and remove sulfides existing on the surface of the part.
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