Nanocarbide precipitation strengthened ultrahigh-strength corrosion-resistant, structural steels

Nanocarbide precipitation strengthened ultrahigh-strength corrosion-resistant, structural steels

  • CN 1,514,887 B
  • Filed: 02/11/2002
  • Issued: 05/15/2013
  • Est. Priority Date: 02/09/2001
  • Status: Active Grant
First Claim
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1. an alloy composite, is characterized in that:

  • with array configuration, by weight, contain 0.1~

    0.3% carbon C, 8~

    17% cobalt Co, 0~

    5% nickel, 6~

    11% chromium Cr, less than 1% silicon Si, less than 0.5% manganese Mn, with less than 0.15% bronze medal Cu, have and be selected from lower one or more;

    less than 3% molybdenum Mo, less than 0.3% niobium Nb, less than 0.8% vanadium V, less than 0.2% tantalum Ta, less than 3% tungsten W;

    And have and be selected from from lower one or more;

    less than 0.2% titanium Ti, less than 0.2% lanthanum La or other rare earth elements, less than 0.15% zirconium Zr, less than 0.005% boron;

    Mainly with iron Fe balance, incidental element and other impurity, wherein, by weight;

    sulphur S is less than 0.02%, and phosphorus P is less than 0.012%, and oxygen O is less than 0.015%, and nitrogen N is less than 0.015%;

    Described alloy contains lath martensite mutually for principal phase, and institute with requiring the maintenance lath martensite have the austenite that retains less than 2.5 volume %, the existence form of described carbon is that mean diameter is less than the nano level M of 10nm 2C carbide dispersion, wherein M is selected from one or more elements in Mo, Nb, V, Ta, W, Cr.

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