| 摘要 |
<p>The invention relates to a high strength hot dip galvanised complex phase steel strip consisting, in mass percent, of the following elements: 0.13-0.19 %C, 1.70- 2.50 %Mn, max 0.15 % Si, 0.40 - 1.00 % Al, 0.05 - 0.25 % Cr, 0.01 - 0.05 % Nb, max 0.10 % P, max 0.004 % Ca, max 0.05 % S, max 0.007 % N, and optionally at least one of the following elements: max 0.50 % Ti, max 0.40 % V, max 0.50 % Mo, max 0.50 % Ni, max 0.50 % Cu, max 0.005 % B, the balance being Fe and inevitable impurities, wherein 0.40 % < Al + Si < 1.05 % and Mn + Cr > 1.90 %, and having a complex phase microstructure, in volume percent, comprising 8-12 % retained austenite, 20 - 50 % bainite, less than 10 % martensite, the remainder being ferrite, as well as to a method of producing the same.</p> |
