| 摘要 |
PURPOSE:To obtain a steel sheet for engine gaskets having an excellent spring characteristic and stress corrosion cracking characteristic by subjecting a stainless steel which contains C at a low ratio and is added with N at a specific ratio to final cold rolling at a specific draft then to an aging treatment in a specific temp. range. CONSTITUTION:The stainless steel having the compsn. consisting of <=0.03% C, 15.0-20.0% Cr, 5.0-10.0% Ni, 0.08-0.30% N, and the balance Fe and inevitable impurities is used as a stock. Such steel is subjected to hot rolling, cold rolling and soln. heat treatment, etc., then to the final cold rolling at >=30% draft. The steel is then subjected to the aging treatment for >=10sec in a >=300 deg.C-<=600 deg.C range. The stainless steel sheet which is improved in the stress corrosion cracking characteristic and has the spring characteristic and oscillation fatigue characteristic necessary as the stock for a metallic gasket, etc., is thereby obtd.
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