Low-carbon sulfur-automatic steel with good cutability

Low-carbon sulfur-automatic steel with good cutability

  • CN 101,331,242 A
  • Filed: 10/12/2006
  • Published: 12/24/2008
  • Est. Priority Date: 12/16/2005
  • Status: Active Application
First Claim
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1. the low-carbon (LC) sulphur free-cutting steel of an excellent in machinability is characterized in that, contains:

  • C;

    0.02~

    0.15 quality %,Si;

    0.004 quality % following but do not contain 0 quality %,Mn;

    0.6~

    3 quality %,P;

    0.02~

    0.2 quality %,S;

    0.35~

    1 quality %,Al;

    0.005 quality % following but do not contain 0 quality %,0;

    0.008~

    0.03 quality %,N;

    0.007~

    0.03 quality %,Surplus is Fe and unavoidable impurities,And ratio [Mn]/[S] of Mn content [Mn] and S content [S] is in 3~

    4 scope, and satisfies (1) formula, should (1) formula be;

    10·

    [C]×

    [Mn] -0.94+1226·

    [N] 2

    1.2…

    (1) And, in should (1) formula should [C], should [Mn] and should [N] represent the content of representing with mass percent of C, Mn and N respectively.

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