Rolled steel with excellent toughness of sparkling heat effect section and manufacturing method thereof

Rolled steel with excellent toughness of sparkling heat effect section and manufacturing method thereof

  • CN 101,294,257 A
  • Filed: 02/19/2008
  • Published: 10/29/2008
  • Est. Priority Date: 04/23/2007
  • Status: Active Application
First Claim
Patent Images

1. the steel of the tenacity excellent of a welding heat affected zone, it is characterized in that, % contains in quality:

  • C;

    0.01~

    0.2%, Si;

    0.5% following but do not contain 0%, Mn;

    2.5% is following but do not contain 0%, Ti;

    0.03% is following but do not contain 0% and N;

    0.01% following but do not contain 0%, and satisfy;

    P;

    0.02% following but do not contain 0%, S;

    0.015% is following but do not contain 0% and Al;

    0.01% following and contain 0%And, also containing REM;

    0.0010~

    0.1% and Zr;

    0.001~

    0.05%, surplus is iron and unavoidable impurities,In inclusion, contain REM and Zr, and satisfy;

    Solid solution REM;

    0.0010% is following and contain 0%, solid solution Zr;

    0.0010% is following and contain 0%.

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