Process for the production of stainless steel sheets having an excellent corrosion resistance
First Claim
1. A process for the production of stainless steel sheets having an excellent corrosion resistance, wherein said stainless steel sheet contains C:
- not more than 0.01 wt %, S;
not more than 0.005 wt % and O;
not more than 0.005 wt % said stainless steel being produced by the steps of;
hot rolling said stainless steel sheet at a draft below 830°
C. of greater than about 30%,cooling the resulting hot rolled sheet at a cooling rate of greater than about 25°
C./sec,coiling said stainless steel sheet at a temperature of less than about 650°
C., and thereafter subjecting said stainless steel sheet to annealing and pickling.
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Abstract
This invention relates to a process for the production of stainless steel sheets and proposes a process for the production of stainless steel sheets having a more excellent corrosion resistance as compared with the conventional one without trimming the steel sheet surface after annealing-pickling by preventing the chapping of steel sheet surface created in the production of present stainless steel sheet, particularly stainless steel sheets having extreme-low amounts of C, S, O.
For this purpose, according to the invention, a starting material of stainless steel containing C: not more than 0.01 wt %, S: not more than 0.005 wt % and O: not more than 0.005 wt % is subjected to a hot rolling at a draft below 830° C. of not less than 30%, cooled at a cooling rate of not less than 25° C. sec, coiled below 650° C. and then annealed and pickled.
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Citations
7 Claims
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1. A process for the production of stainless steel sheets having an excellent corrosion resistance, wherein said stainless steel sheet contains C:
- not more than 0.01 wt %, S;
not more than 0.005 wt % and O;
not more than 0.005 wt % said stainless steel being produced by the steps of;hot rolling said stainless steel sheet at a draft below 830°
C. of greater than about 30%,cooling the resulting hot rolled sheet at a cooling rate of greater than about 25°
C./sec,coiling said stainless steel sheet at a temperature of less than about 650°
C., and thereafter subjecting said stainless steel sheet to annealing and pickling. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- not more than 0.01 wt %, S;
Specification