| 摘要 |
Tubular metal products and methods of making tubular metal products for use in sour gas wells, which are characterized by resistance to hydrogen sulfide embrittlement at temperatures up to about 600 DEG F., are provided based upon an alloy having the composition up to about 0.035% maximum carbon, up to about 0.15% maximum silicon, up to about 0.15% maximum manganese, up to about 0.010% maximum sulfur, up to about 0.015% maximum phosphorus, about 19.0% to about 21.0% chromium, about 33.0% up to 37.0% nickel, about 9.0% to about 10.5% molybdenum, up to about 1.00% titanium, up to about 0.015% boron, up to about 2% iron and the balance cobalt, said tubular product having been strengthened by explosive shock loading which may be followed by heat treatment to further strengthen the tubular product. A small amount of cold work between the explosive shock strengthening treatment and heat treatment may be used to control the size and shape of the product and provide additional strengthening if needed. This same practice may be applied to other alloys of the nickel-base, iron-nickel base, cobalt-nickel base, cobalt base and iron-nickel-cobalt base groups which are responsive to cold working to produce higher strengths and reduce sulfide stress cracking.
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