| 摘要 |
<p>The present invention relates to a lightweight hot rolled steel sheet having excellent hot rolling property and corrosion resistance and a method for manufacturing the same. An embodiment according to the present invention provides a lightweight hot rolled steel sheet having excellent hot rolling property and corrosion resistance and a method for manufacturing the same which contains C: 0.5% or less, Al: 12 to 18%, Ti: 0.1 to 2.0%, Cu: 0.3 to 1.0%, Cr: more than 5 to 12%, Ni: 0.1 to 0.5%, Mn: 0.5 to 3.0%, Mo: 0.02 to 1%, Nb: 0.05 to 1%, S: 0.01% or less, P: 0.02% or less, N: 0.01% or less, remaining Fe and other inevitable impurities in w%, wherein the Anti-phase Boundary Energy is lower than 70mJ/m_2. According to the present invention, a steel plate which has an excellent productivity without generating cracks during hot rolling even if Al an element with a low melting point is added by more than 12% and has high ductility, low specific gravity and an excellent corrosion resistance in a sulfuric acid atmosphere can be provided by improving the integrity between ordered phases such as B2, DO3 and BCC phase and at the same time by suppressing generation of carbide precipitates.</p> |
