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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％

    Steels which are useful in fabricating pressure vessels
    6.
    发明授权
    Steels which are useful in fabricating pressure vessels 失效
    可用于制造压力容器的钢

    公开(公告)号：US4375377A

    公开(公告)日：1983-03-01

    申请号：US237958

    申请日：1981-02-25

    申请人： Hiroo Ohtani ,  Seiichi Watanabe

    发明人： Hiroo Ohtani ,  Seiichi Watanabe

    IPC分类号： C21D1/28 ,  C21D8/02

    CPC分类号： C21D1/28 ,  C21D8/0263

    摘要： Chromium-molybdenum steels which have high strengths, good hydrogen attack resistivities, good high-temperature ductilities and high creep rupture strength, and which, when formed into steel plates, welded and given a high-temperature strain relief annealing treatment will acquire high resistivity to creep damage, comprises 0.11 to 0.17% of C, 0.50 to 1.20% of Si, 0.46 to 1.00% of Mn, 1.00 to 1.50% of Cr, 0.45 to 0.65% of Mo, 0.00015 to 0.0015% of B, 0.010 to 0.100% of Sol. Al and inevitably entrained impurities, the balance to make up 100% of Fe. Preferably the inevitable nitrogen and phosphorus impurities are kept below 0.0060% of N and 0.010% of P.

    摘要翻译： 具有高强度，良好的氢侵蚀电阻，良好的高温延展性和高蠕变断裂强度的铬钼钢，并且当形成钢板时，焊接并进行高温应变消除退火处理将获得高电阻率 蠕变损伤包括C的0.11〜0.17％，Si：0.50〜1.20％，Mn：0.46〜1.00％，Cr：1.00〜1.50％，Mo：0.45〜0.65％，B：0.00010〜0.115％ 的Sol。 Al和不可避免的夹带杂质，余量弥补100％的Fe。 优选地，不可避免的氮和磷杂质保持在N的0.0060％和P.0.010％以下。

    Heavy thick high-strength casting having improved weldability and impact properties
    7.
    发明授权
    Heavy thick high-strength casting having improved weldability and impact properties 失效
    具有改善焊接性和冲击性能的重型高强度铸件

    公开(公告)号：US4344801A

    公开(公告)日：1982-08-17

    申请号：US236312

    申请日：1981-02-20

    申请人： Tatsuro Kunitake ,  Hiroo Ohtani ,  Seiichi Watanabe ,  Toshiji Takigawa ,  Yoshiro Matsumoto

    发明人： Tatsuro Kunitake ,  Hiroo Ohtani ,  Seiichi Watanabe ,  Toshiji Takigawa ,  Yoshiro Matsumoto

    IPC分类号： C21D1/78 ,  C21D9/00

    CPC分类号： C21D1/78

    摘要： A heavy thick steel casting having high mechanical strength with a tensile strength of 80 kg/mm.sup.2 or more, excellent impact properties with a vE.sub.O value of more than 8 kg-m/cm.sup.2 and improved weldability, and also a method of manufacturing the same.In the method, steel containing boron as an essential component and with a Ceq value corresponding to the maximum thickness of the product is cast. The casting is solidified in air, then heated to a temperature of 930.degree. to 1,050.degree. C. for one hour or more, followed by air cooling. Thereafter, the casting is quenched and tempered to thereby impart the casting with the desired characteristics.

    摘要翻译： 具有抗拉强度为80kg / mm 2以上的机械强度高的重型厚钢铸件，vEO值大于8kg-m / cm 2的优异的冲击性能和改善的可焊性，以及其制造方法。 在该方法中，铸造含有硼作为必需组分并且具有对应于产品的最大厚度的Ceq值的钢。 将该铸件在空气中固化，然后加热到930〜1050℃的温度1小时以上，然后冷却。 此后，将铸件淬火和回火，从而赋予铸件所需的特性。

    Method of making steels which are useful in fabricating pressure vessels
    8.
    发明授权
    Method of making steels which are useful in fabricating pressure vessels 失效
    制造用于制造压力容器的钢的方法

    公开(公告)号：US4394187A

    公开(公告)日：1983-07-19

    申请号：US238030

    申请日：1981-02-25

    申请人： Hiroo Ohtani ,  Seiichi Watanabe

    发明人： Hiroo Ohtani ,  Seiichi Watanabe

    IPC分类号： C22C38/32 ,  C22C38/22 ,  C21D8/02

    CPC分类号： C22C38/32

    摘要： Chromium-molybdenum structural steels which have high tensile strength, low susceptability to temper embrittlement, high hydrogen attack resistivity and high temperature ductility and which can be formed into very thick steel plates comprise 0.05 to 0.20% of C, 0 to 0.15% of Si, 0.46 to 1.00% of Mn, 2.00 to 3.50% of Cr, 0.80 to 1.20% of Mo, 0.00015 to 0.0015% of B, 0.005 to 0.070% of Sol. Al and inevitably entrained impurities, the balance to make up 100% of Fe. Preferably the inevitably entrained impurities of nitrogen and phosphorus are below 0.0060% of N and 0.0010% of P.

    摘要翻译： 具有高拉伸强度，回火脆化敏感性低，耐高侵蚀电阻率和高温延展性并且可以形成非常厚的钢板的铬钼结构钢包括0.05至0.20％的C，0至0.15％的Si， Mn为0.46〜1.00％，Cr为2.00〜3.50％，Mo为0.80〜1.20％，B为0.00015〜0.0015％，Sol为0.005〜0.070％。 Al和不可避免的夹带杂质，余量弥补100％的Fe。 优选氮和磷不可避免地携带的杂质低于N的0.0060％和P.10的0.0010％。