High-strength wire rod having superior rod drawability, manufacturing method therefor

High-strength wire rod having superior rod drawability, manufacturing method therefor

  • CN 101,208,445 A
  • Filed: 06/29/2006
  • Published: 06/25/2008
  • Est. Priority Date: 06/29/2005
  • Status: Active Grant
First Claim
Patent Images

1. high-strength wire material that the pull and stretch value is high, it contains C:

  • 0.7~

    1.2%, Si;

    0.35~

    1.5%, Mn;

    0.1~

    1.0%, N;

    0.001~

    0.006%, Al;

    0.005~

    0.1% in quality %, also by containing B with 0.0004~

    0.0060% scope of supplying with, and solid solution B amount is more than 0.0002%, remainder is Fe and unavoidable impurities, and tensile strength TS (MPa) represents with following formula (1);

    The part of the degree of depth from the top layer to 100 μ

    m, below 10%, remainder is a pearlitic structure by the first area occupation ratio of analysing the non-pearlitic structure that ferrite, pseudopearlite or bainite constitute of separating out along original austenite crystal prevention,TS 〉

    =(1000 * C (%)-(mm)+450,10 * line footpath) (1).

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