Micro Alloying steel

Micro Alloying steel

  • CN 104,254,626 B
  • Filed: 04/30/2013
  • Issued: 04/17/2018
  • Est. Priority Date: 04/30/2013
  • Status: Active Grant
First Claim
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1. a kind of cracked and the Micro Alloying steel used, it is characterised in that comprising following composition of steel, contained in terms of quality %Have:

  • C:

    0.20~0.60%,Si:

    0.50~2.0%,Mn:

    0.20~2.0%,P:

    0.010~0.15%,S:

    0.010~0.15%,V:

    0.20~0.50%,N:

    0.002~0.02%,Its surplus is made of Fe and impurity,By maximum being averaged relative to the V concentration in the steel of the V concentration in the steel on section of steelThe ratio of value as V segregation than when, the segregation of the V is compared for 1.0 less than 3.0,The fragment yield of the plane of disruption is below 1.0mg, and the fragment yield of the plane of disruption, is to make test film with height of the fallAfter 100mm fractures, be repeated 10 times by the plane of disruption dock and with the moment of torsion of 20Nm tighten work that bolt assembled andUnclamp bolt and decontrol the gross weight of the fragment to have come off during the work of the plane of disruption.

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