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    Process for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking
    1.
    发明授权
    Process for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking 失效
    制造具有改进的抗应力腐蚀开裂性能的高强度深井套管和管道的方法

    公开(公告)号：US4421571A

    公开(公告)日：1983-12-20

    申请号：US389568

    申请日：1982-06-17

    申请人： Takeo Kudo ,  Yasutaka Okada ,  Taishi Moroishi ,  Akio Ikeda ,  Hiroo Ohtani ,  Kunihiko Yoshikawa

    发明人： Takeo Kudo ,  Yasutaka Okada ,  Taishi Moroishi ,  Akio Ikeda ,  Hiroo Ohtani ,  Kunihiko Yoshikawa

    IPC分类号： C21D8/10 ,  C22C19/05 ,  C22C38/44

    CPC分类号： C21D8/105 ,  C22C19/05 ,  C22C38/44

    摘要： A process for manufacturing high strength deep well casing, tubing, and drill pipes, which have improved resistance to stress corrosion cracking is disclosed. The process comprises the steps of preparing an alloy composition which is:______________________________________ C .ltoreq.0.05% Si .ltoreq.1.0% Mn .ltoreq.2.0% P .ltoreq.0.030% S .ltoreq.0.005% N 0-0.30% Ni 25-60% Cr 15-35% Mo 0-12% W 0-24% Cr (%) + 10Mo (%) + 5W (%) .gtoreq. 50% 1.5% .ltoreq. Mo (%) + 1/2W (%) .ltoreq. 12% Cu 0-2.0% Co 0-2.0% Rare Earths 0-0.10% Y 0-0.20% Mg 0-0.10% Ti 0-0.5% Ca 0-0.10% and incidental impurities balance; ______________________________________ applying, after hot working, the solid solution treatment to the alloy at a temperature of from the lower limit temperature (.degree.C.) defined by the following empirical formula: 260 log C(%)+1300 to the upper limit temperature (.degree.C. ) defined by the following empirical formula: 16Mo(%)+10W(%)+10Cr(%)+777 for a period of time of not longer than 2 hours; and applying cold working to the resulting alloy with a reduction in thickness of 10-60%. The hot working may be carried out with a reduction in thickness of 10% or more for the temperature range of not higher than the recrystallizing temperature thereof.

    摘要翻译： 公开了一种制造具有改进的耐应力腐蚀开裂性能的高强度深井套管，管道和钻杆的方法。 该方法包括以下步骤：制备合金组合物，其为：-C 15％Si = 1.0％-Mn 2.0％P / = 50％-1.5％

    Ferritic stainless steel having good corrosion resistance
    6.
    发明授权
    Ferritic stainless steel having good corrosion resistance 失效
    铁素体不锈钢具有良好的耐腐蚀性

    公开(公告)号：US4360381A

    公开(公告)日：1982-11-23

    申请号：US251771

    申请日：1981-04-07

    申请人： Yoshio Tarutani ,  Taishi Moroishi ,  Masao Koike

    发明人： Yoshio Tarutani ,  Taishi Moroishi ,  Masao Koike

    IPC分类号： C22C38/26

    CPC分类号： C22C38/26

    摘要： A 10-35% Cr ferritic stainless steel stabilized with 0.20-1.00% of Nb wherein Nb%.gtoreq.(8.times.C%+2.0%) with impurities, such as carbon, nitrogen, phosphorous, oxygen and sulfur reduced to given levels is disclosed. By reducing the sulfur content to a level of not greater than 0.002%, preferably less than 0.001% or in cases where copper and/or nickel is added, to a level of not greater than 0.005%, the corrosion resistance of the resulting steel can markedly be improved. Since the ferritic stainless steel of this invention also exhibits a combination of good surface appearance and formability, it can be substituted for certain austenitic stainless steels not only as a general corrosion resistant material, but also as a material for making external automotive trims and so on.

    摘要翻译： 公开了一种用0.20-1.00％的Nb稳定化的10-35％Cr铁素体不锈钢，其中Nb％> =（8×C％+ 2.0％）与杂质如碳，氮，磷，氧和硫相比减少到给定水平 。 通过将硫含量降低到不大于0.002％，优选小于0.001％或在加入铜和/或镍的情况下，其含量不得高于0.005％，所得钢罐的耐腐蚀性 明显改善。 由于本发明的铁素体不锈钢也表现出良好的表面外观和成形性的组合，所以它可以代替一些奥氏体不锈钢，不仅可以作为一般的耐腐蚀材料，而且可以用作制造外部汽车饰件等的材料 。

    High temperature oxidation resistant austenitic steel
    8.
    发明授权
    High temperature oxidation resistant austenitic steel 失效
    耐高温氧化奥氏体钢

    公开(公告)号：US4530720A

    公开(公告)日：1985-07-23

    申请号：US553875

    申请日：1983-11-21

    申请人： Taishi Moroishi ,  Hisao Fujikawa ,  Junichiro Murayama ,  Yuji Shoji

    发明人： Taishi Moroishi ,  Hisao Fujikawa ,  Junichiro Murayama ,  Yuji Shoji

    IPC分类号： C22C38/00 ,  C22C38/40 ,  C22C38/58 ,  C22C38/38

    CPC分类号： C22C38/40 ,  C22C38/58 ,  F28F19/06 ,  F28F21/083

    摘要： The present invention relates to the austenitic steel having improved resistance to oxidation at the high temperature, comprising not more than 0.10% C, 0.1-5.0% Si, not more than 3% Mn, 7-45% Ni, 15-30% Cr and sulfur content being restricted to not more than 0.003%. According to the present invention, by limiting the sulfur content in the austenitic steel to not more than 0.003%, preferably to not more than 0.0015%, the heat-resisting steel material which can show improved resistance to oxidation under severe conditions including repeated heating to high temperatures and cooling to room temperature is provided.

    摘要翻译： 本发明涉及耐高温氧化性能提高的奥氏体钢，其含有不超过0.10％的C，0.1-5.0％的Si，不超过3％的Mn，7-45％的Ni，15-30％的Cr 硫含量限制在0.003％以下。 根据本发明，通过将奥氏体钢中的硫含量限制在不大于0.003％，优选至不多于0.0015％的耐热钢材料，其可以在恶劣条件下显示出提高的抗氧化性，包括重复加热至 提供高温和冷却至室温。