Method of manufacturing austenitic stainless steel plates

Details Method of manufacturing austenitic stainless steel plates Method of manufacturing austenitic stainless steel plates

C - Chemistry, Metallurgy

22

C

148/31

C22C 37/00 (2006.01) C21D 8/02 (2006.01)

Patent

CA 1237642

ABSTRACT OF THE DISCLOSURE METHOD OF MANUFACTURING AUSTENITIC STAINLESS STEEL PLATES An austenitic stainless steel plate containing up to 0.08 wt.% of carbon, up to 1.0 wt.% of silicon, up to 2.0 wt.% of manganese, 8.0 - 16.0 wt.% of nickel, 16.0 - 20.0 wt.% of chromium, 0 - 30 wt.% of molybdenum, up to 0.25 wt.% of nitrogen and the balance of iron and inherent impurities, is manufactured by rolling a stainless steel blank at a temperature higher than TR(°C) = 940 + 30 (%Mo), and then cooling the rolled blank from a temperature above 800°C to a temperature below 500°C at a cooling speed higher than Rc (°C/sec.) shown by the following equations: log (Rc) = - 0.32 + 14 (%C + %N) - 0.067 (%Mo) when (%C + %N) ? 1.0 wt.% ; and log (Rc) = 1.08 - 0.067 (%Mo) when (%C + %N) > 1.0 wt.%.

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