| 摘要 |
<p>The invention deals with a hot rolled and enamelled steel sheet free of fish scale defects, comprising, in % by weight:
C: 0.02 - 0.1 %
Mn : 0.3 - 1%
Al : 0.1 - - 0.4 %
Si : 0 - 0.3%
B : 0,002 - 0.01%
Nb: 0 - 0.1%
V : 0 - 0.08%
Ni : 0 - 0,35 %
Cu : 0 - 0,25 %
N: < 0.04 %
P : < 0,03 %
S : < 0.03 %
the balance being iron and unavoidable impurities due to smelting, said steel sheet having a thickness Th and having being coiled at a temperature T coiling , after being hot rolled, said composition comprising moreover a boron content B above or equal to Bmin defined according to the following relationship : Bmin ppm = 60 - 12 × Th mm + T coiling °C / 18
and with a manufacturing process of said sheet.</p> |
