Abrasion-resistant steel plate or sheet with excellent weld toughness and delayed fracture resistance

Abrasion-resistant steel plate or sheet with excellent weld toughness and delayed fracture resistance

  • CN 102,959,113 A
  • Filed: 06/29/2011
  • Published: 03/06/2013
  • Est. Priority Date: 06/30/2010
  • Status: Active Application
First Claim
Patent Images

1. the wear-resistant steel plate of a toughness of welded zone and delayed fracture resistance characteristics excellence has following composition:

  • In quality %, contain that C;

    0.20~

    0.30%, Si;

    0.05~

    1.0%, Mn;

    0.40~

    1.2%, P;

    0.010% are following, S;

    0.005% is following, Cr;

    0.40~

    1.5%, Nb;

    0.005~

    0.025%, Ti;

    0.005~

    0.03%, Al;

    0.1% are following, below the N;

    0.01%, hardenability index DI* by formula (1) expression is more than 45, remainder is formed by Fe and inevitable impurity, and microtexture is as matrix phase take martensite;

    DI*



    33.85×



    0.1×

    C)

    0.5×



    0.7×

    Si+

    1)

    ×



    3.33×

    Mn+

    1)

    ×



    0.35×

    Cu+

    1)

    ×



    0.36×

    Ni+

    1)

    ×



    2.16×

    Cr+

    1)

    ×





    Mo+

    1)

    ×



    1.75×

    V+

    1)

    ×



    1.5×

    W+

    1)

    ·

    ·

    ·

    ·

    ·



    1)

    In the formula (1), each symbol of element is the content in quality %.

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