Austenite-based weld and employ stress corrosion cracking preventive maintenance method and the grain boundary corrosion preventive maintenance method of this material

Austenite-based weld and employ stress corrosion cracking preventive maintenance method and the grain boundary corrosion preventive maintenance method of this material

  • CN 102,245,345 B
  • Filed: 12/16/2009
  • Issued: 09/02/2015
  • Est. Priority Date: 12/18/2008
  • Status: Active Grant
First Claim
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1. a stress corrosion cracking preventive maintenance method, is the preventive maintenance method of the structure welding austenite stainless steel steel being carried out to stress corrosion cracking, it is characterized in that having following steps:

  • On the surface of the welding heat affected zone of described structure, the welding material as described below by built-up welding and form the built-up welding step in built-up welding portion,Wherein, described welding material is austenite-based weld, containing below C;

    0.01wt%, below Si;

    0.5wt%, below Mn;

    0.5wt%, below P;

    0.005wt%, below S;

    0.005wt%, Ni;

    15 ~ 40wt%, Cr;

    20 ~ 30wt%, below N;

    0.01wt%, below O;

    0.01wt%, surplus is Fe and inevitable impurity, whereinThe B contained as described inevitable impurity in described welding material is below 3wtppm, and the content of described C, P, S, N and O in described welding material adds up to below 0.02wt%.

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