| 摘要 |
<p>The invention relates to a high strength hot dip galvanised steel strip consisting, in mass percent, of the following elements: 0.10 - 0.18 % C 1.90 - 2.50 % Mn 0.30 - 0.50 % Si 0.50 - 0.70 % Al 0.10 - 0.50 % Cr 0.001 - 0.10 % P 0.01 - 0.05 % Nb max 0.004 % Ca max 0.05 % S max 0.007 % N and optionally at least one of the following elements: 0.005 - 0.50 % Ti 0.005 - 0.50 % V 0.005 - 0.50 % Mo 0.005 - 0.50 % Ni 0.005 - 0.50 % Cu max 0.005 % B the balance being Fe and inevitable impurities, wherein 0.80 % < Al + Si < 1.05 % and Mn + Cr > 2.10 %. This steel offers improved formability at a high strength, has a good weldability and surface quality together with a good producability and coatability.</p> |
