High-tensile strength steel and manufacturing method thereof

High-tensile strength steel and manufacturing method thereof

  • CN 102,124,133 A
  • Filed: 03/27/2009
  • Published: 07/13/2011
  • Est. Priority Date: 03/31/2008
  • Status: Active Application
First Claim
Patent Images

1. high-strength steel, it has following one-tenth and is grouped into:

  • Contain that C;

    0.03~

    0.10 quality %, Si;

    0.30 quality % are following, Mn;

    1.60~

    2.30 quality %, P;

    0.015 quality % following, S;

    0.005 quality % is following, Al;

    0.005~

    0.06 quality %, Nb;

    0.004~

    0.05 quality %, Ti;

    0.005~

    0.02 quality %, N;

    0.001~

    0.005 quality %, Ca;

    0.0005~

    0.003 quality %And the content of Ca, S and O satisfies following (1) formula, and surplus is made up of Fe and unavoidable impurities,0<

    (Ca-(0.18+130×

    Ca)×

    O)/1.25/S<

    1 …

    (1)Wherein, Ca, S and O represent the quality % content of each element.

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