Method for producing high-strength stainless steel pipe, and high-strength stainless steel pipe

Method for producing high-strength stainless steel pipe, and high-strength stainless steel pipe

  • CN 105,579,597 A
  • Filed: 08/04/2014
  • Published: 05/11/2016
  • Est. Priority Date: 09/04/2013
  • Status: Active Application
First Claim
Patent Images

1. the manufacture method of a high strength stainless steel pipe, it is characterized in that, one-tenth is grouped in mass % containing C:

  • 0.005 ~ 0.05%, Si;

    0.05 ~ 1.0%, Mn;

    0.2 ~ 1.8%, below P;

    0.03%, below S;

    0.005%, Cr;

    14 ~ 20%, Ni;

    1.5 ~ 10%, Mo;

    1 ~ 5%, below V;

    0.5%, below N;

    0.15%, below O;

    0.01%, the steel pipe of predetermined size made by Al;

    0.002 ~ 0.1% and the former material of steel that surplus is made up of Fe and inevitable impurity, to this steel pipe repeatedly carry out more than twice reheat the quench treatment being cooled to less than 100 DEG C to the temperature of more than 750 DEG C with speed of cooling more than air cooling, and, in described quench treatment, final quench treatment is at χ

    phase and M 23c 6precipitation Temperature more than temperature under carry out, implement temper at the temperature then below 700 DEG C.

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