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    HIGH STRENGTH SEAMLESS STEEL PIPE FOR USE IN OIL WELLS AND MANUFACTURING METHOD THEREOF
    3.
    发明公开
    HIGH STRENGTH SEAMLESS STEEL PIPE FOR USE IN OIL WELLS AND MANUFACTURING METHOD THEREOF 审中-公开
    用于油井的高强度无缝钢管及其制造方法

    公开(公告)号：EP3192889A1

    公开(公告)日：2017-07-19

    申请号：EP15839926.1

    申请日：2015-08-20

    申请人： JFE Steel Corporation

    发明人： YUGA, Masao ,  ISHIGURO, Yasuhide ,  OKATSU, Mitsuhiro ,  FUJIMURA, Kazuki

    IPC分类号： C22C38/00 ,  C21D8/10 ,  C21D9/08 ,  C22C38/32 ,  C22C38/54

    CPC分类号： C22C38/12 ,  C21D8/105 ,  C21D9/085 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/32 ,  F16L9/02

    摘要： Provided is a high-strength seamless steel pipe for an oil country tubular goods having excellent sulfide stress corrosion cracking resistance. The high-strength seamless steel pipe for an oil country tubular goods has the composition which contains, by mass%, 0.20 to 0.50% C, 0.05 to 0.40% Si, 0.3 to 0.9% Mn, 0.015% or less P, 0.005% or less S, 0.005 to 0.1% Al, 0.008% or less N, more than 0.6% and 1.7% or less Cr, more than 1.0% and 3.0% or less Mo, 0.01 to 0.30% V, 0.001% or more and less than 0.01% Nb, 0.0003 to 0.0030% B, and 0.0030% or less O (oxygen). The high-strength seamless steel pipe for an oil country tubular goods has the microstructure where a volume fraction of a tempered martensitic phase is 95% or more, and prior austenitic grains have a grain number of 8. 5 or more, and a segregation degree index Ps which is defined by a formula Ps = 8.1 (X Si + X Mn + X Mo ) + 1.2X P relating to X M which is a ratio between a segregated portion content and an average content is set to less than 65. (Here, X M : (segregated portion content (mass%) of element M) / (average content (mass%) of element M))

    摘要翻译： 本发明提供一种耐硫化物应力腐蚀开裂性优异的油井管用高强度无缝钢管。 本发明的油井管用高强度无缝钢管以质量％计含有C：0.20〜0.50％，Si：0.05〜0.40％，Mn：0.3〜0.9％，P：0.015％以下，0.005％ 更少的S，0.005-0.1％的Al，0.008％或更少的N，大于0.6％和1.7％或更少的Cr，大于1.0％和3.0％或更少的Mo，0.01-0.30％的V，0.001％或更多， ，Nb：0.01％以上，B：0.0003〜0.0030％，O（氧）：0.0030％以下。 该油井管用高强度无缝钢管具有回火马氏体相的体积分数为95％以上，并且原奥氏体粒子的粒数为8.5以上，偏析度 由与分离部分含量与平均含量之间的比率XM相关的公式Ps = 8.1（XSi + XMn + XMo）+ 1.2XP定义的指标Ps被设定为小于65.（这里，XM：（ 元素M的偏析部分含量（质量％））/（元素M的平均含量（质量％）））

    STEEL SULFIDE-STRESS-CRACKING TEST METHOD AND SEAMLESS STEEL PIPE HAVING EXCELLENT SULFIDE-STRESS-CRACKING RESISTANCE
    4.
    发明公开
    STEEL SULFIDE-STRESS-CRACKING TEST METHOD AND SEAMLESS STEEL PIPE HAVING EXCELLENT SULFIDE-STRESS-CRACKING RESISTANCE 审中-公开
    钢的硫化物应力开裂试验方法和具有优良的硫化物应力开裂性的无缝钢管

    公开(公告)号：EP3173764A1

    公开(公告)日：2017-05-31

    申请号：EP15824727.0

    申请日：2015-07-17

    申请人： JFE Steel Corporation

    发明人： YUGA, Masao ,  ISHIGURO, Yasuhide ,  FUJIMURA, Kazuki ,  OKATSU, Mitsuhiro ,  SUGANO, Yoshiyuki

    IPC分类号： G01N3/08 ,  G01N17/00 ,  C22C38/00 ,  C22C38/50

    CPC分类号： G01N17/006 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  G01N3/08 ,  G01N17/00 ,  Y10T436/184

    摘要： When the resistance to sulfide stress corrosion cracking is evaluated by applying a constant load stress σ (MPa) to a round bar tensile test specimen immersed in a test solution and checking whether failure occurs before a particular time passes, the round bar tensile test specimen including a parallel section, a shoulder section, and a grip section is used. In the round bar tensile test specimen, the shoulder section is formed by a curve having two or more radii of curvature, a radius of curvature R1 (mm) of a portion adjacent to the parallel section is 15 mm or more and satisfies (0.22σ - 119) ≤ R1 ≤ 100, a length X1 (mm) of a portion of the curve having the radius of curvature R1 in a longitudinal direction of the test specimen satisfies X1 ≥ √{(r/8) × (R1 - r 2 /4)} (r: radius (mm) of the round bar tensile test specimen in the parallel section), and the radius of curvature R1 is larger than other radii of curvature. Thus, even when the steel is a high-strength steel having a yield strength of 758 MPa or higher, the occurrence of the failure in the shoulder section is suppressed, and the resistance to sulfide stress corrosion cracking can be properly evaluated.

    摘要翻译： 当通过对浸入试验溶液中的圆棒拉伸试验样品施加恒定负荷应力σ（MPa）并且在特定时间过后检查是否发生破坏来评价耐硫化物应力腐蚀开裂性能时，圆棒拉伸试验样品包括 平行部分，肩部部分和把手部分。 在圆棒拉伸试验片中，肩部由具有两个以上曲率半径的曲线形成，与平行部相邻的部分的曲率半径R1（mm）为15mm以上，满足（0.22σ -119）≤R1≤100时，在试验片的长度方向上具有曲率半径R1的曲线部分的长度X1（mm）满足X1≥√{（r / 8）×（R1-r2 / 4）}（r：平行截面中的圆棒拉伸试验片的半径（mm）），曲率半径R1大于其他曲率半径。 因此，即使在钢为屈服强度为758MPa以上的高强度钢的情况下，也能够抑制肩部的失效发生，能够适当地评价耐硫化物应力腐蚀开裂性。

    HEAT TREATMENT EQUIPMENT LINE FOR SEAMLESS STEEL PIPE, AND METHOD FOR MANUFACTURING HIGH-STRENGTH STAINLESS STEEL PIPE
    5.
    发明公开
    HEAT TREATMENT EQUIPMENT LINE FOR SEAMLESS STEEL PIPE, AND METHOD FOR MANUFACTURING HIGH-STRENGTH STAINLESS STEEL PIPE 审中-公开
    热处理厂线生产高强度不锈钢管无缝钢管及方法

    公开(公告)号：EP2933344A1

    公开(公告)日：2015-10-21

    申请号：EP13862381.4

    申请日：2013-12-11

    申请人： JFE Steel Corporation

    发明人： EGUCHI, Kenichiro ,  ISHIGURO, Yasuhide

    IPC分类号： C21D9/08 ,  C21D1/18 ,  C22C38/00 ,  C22C38/58

    CPC分类号： C21D9/085 ,  C21D1/25 ,  C21D9/0062 ,  C21D9/08 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

    摘要： Provided are a method for manufacturing a high strength stainless steel tube or pipe and a heat treatment equipment line for a high strength stainless steel tube or pipe in order to give stable product quality to a high Cr seamless steel tube or pipe which is subjected to a quenching and tempering treatment.
    Using an online heat treatment equipment for a seamless steel tube or pipe in which cooling facilities 4 which are capable of cooling a heat treated steel tube or pipe to a temperature of 20°C or lower are arranged on one of the ends or a portion of a heat treatment carrier line 3 which is arranged between the equipment for quenching 2 and the tempering furnace 5, by performing a heat treatment on a steel tube or pipe containing 14% or more of Cr in a manner such that a steel tube or pipe is cooled to a temperature of 20°C or lower after the steel tube or pipe has been cooled in a cooling process of a quenching treatment to a temperature of 50°C or lower and that the steel tube or pipe is thereafter subjected to a tempering treatment in order to manufacture a high strength stainless steel tube or pipe having stable quality.

    摘要翻译： 提供了用于制造其经受的高强度不锈钢管或管和热处理设备行以得到稳定的产品质量提高到一个高的Cr无缝钢管或管的高强度不锈钢管或管道的所有的方法 调质处理。 使用落在线热处理设备的无缝钢管或管，其中冷却设备4，其能够经热处理的钢管或管道在冷却至20℃或更低的被布置在端部上的一个或一个的一部分的温度的 其在设备之间设置用于骤冷2和回火炉5，通过在钢管或管道在寻求一种方式含有14％以上的Cr进行热处理的热处理载波线路3中的所有做了钢管或管道是 冷却至20℃或更低的钢管或管道已在淬火处理的冷却过程中被冷却至50℃或更低的温度后的温度，也做了钢管或此后管进行回火处理 为了制造具有稳定质量的高强度不锈钢管或管道。

    HIGH-STRENGTH SEAMLESS STEEL PIPE WITH EXCELLENT RESISTANCE TO SULFIDE STRESS CRACKING FOR OIL WELL, AND PROCESS FOR PRODUCING SAME
    6.
    发明公开
    HIGH-STRENGTH SEAMLESS STEEL PIPE WITH EXCELLENT RESISTANCE TO SULFIDE STRESS CRACKING FOR OIL WELL, AND PROCESS FOR PRODUCING SAME 审中-公开
    具有优良的耐高强度无缝钢管硫化物应力用于生产开裂油井及工艺

    公开(公告)号：EP2796587A1

    公开(公告)日：2014-10-29

    申请号：EP12859680.6

    申请日：2012-12-18

    申请人： JFE Steel Corporation

    发明人： EGUCHI, Kenichiro ,  ISHIGURO, Yasuhide ,  MIYATA, Yukio

    IPC分类号： C22C38/32 ,  C22C38/54 ,  C21D8/10 ,  C21D9/08

    CPC分类号： C21D8/105 ,  C21D1/25 ,  C21D8/10 ,  C21D9/08 ,  C21D9/085 ,  C21D2211/008 ,  C21D2221/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  F16L9/02

    摘要： A seamless steel pipe has a composition containing, by mass%, C: 0.15 to 0.50%, Si: 0.1 to 1.0%, Mn: 0.3 to 1.0%, P: 0.015% or less, S: 0.005% or less, Al: 0.01 to 0.1%, N: 0.01% or less, Cr: 0.1 to 1.7%, Mo: 0.40 to 1.1%, V: 0.01 to 0.12%, Nb: 0.01 to 0.08%, Ti: 0.03% or less, and B: 0.0005 to 0.003%, has a structure composed of a tempered martensite phase as a main phase with a prior austenite grain size number of 8.5 or more, and has a hardness distribution in which in four portions 90° apart from each other in the circumferential direction, hardness is 295 HV10 or less in any one of an inner surface-side region at 2.54 to 3.81 mm from the inner surface of the pipe, an outer surface side-region at the same distance from the outer surface of the pipe, and a center of the thickness. Therefore, the seamless steel pipe has high strength of 110 ksi grade (yield strength: 758 MPa or more) and excellent SSC-resistance. The composition may further contain Cu and/or W and/or Ni and/or Ca.

    摘要翻译： 甲无缝钢管具有如下组成成分：以质量％计含有C：0.15〜12：50％以下，Si：0.1〜1.0％以下，Mn：0.3〜1.0％，P：0.015％以下，S：0.005％或以下，Al： 0点01分〜0.1％，N：0.01％以下，Cr：0.1〜1.7％以下，Mo：0.40〜1.1％，V：0.01〜12：12％以下，Nb：0.01〜12：08％以下，Ti：0.03％以下，B： 0.0005〜0.003％，具有与8.5或更高的原始奥氏体粒度号为主相的回火马氏体相构成的结构，并且具有在四个部分90°彼此分开在圆周方向上，其中A硬度分布 ，硬度是在其内表面侧的区域中的任何一个在2:54从管的内表面在与管的外表面相同的距离295 HV10或更少3.81毫米，外表面侧区域，和一个 厚度的中心。 因此，无缝钢管具有110ksi级的高强度（屈服强度：758 MPa以上）和优良的耐SSC性。 该组合物可以含有另外的Cu和/或W和/或Ni和/或Ca.

    HIGH-STRENGTH SEAMLESS STEEL TUBE FOR USE IN OIL WELLS, WHICH HAS EXCELLENT RESISTANCE TO SULFIDE STRESS CRACKING AND PRODUCTION METHOD FOR SAME
    7.
    发明公开
    HIGH-STRENGTH SEAMLESS STEEL TUBE FOR USE IN OIL WELLS, WHICH HAS EXCELLENT RESISTANCE TO SULFIDE STRESS CRACKING AND PRODUCTION METHOD FOR SAME 审中-公开
    高强度无缝钢管FOR USE石油钻井具有产生杰出抗SSC性性能和工艺

    公开(公告)号：EP2447386A1

    公开(公告)日：2012-05-02

    申请号：EP10792232.0

    申请日：2010-06-23

    申请人： JFE Steel Corporation

    发明人： EGUCHI, Kenichiro ,  TANAKA, Yuji ,  KIMURA, Mitsuo ,  ISHIGURO, Yasuhide ,  YAMADA, Katsumi ,  NAKAMICHI, Haruo

    IPC分类号： C22C38/00 ,  C21D9/08 ,  C22C38/32 ,  C22C38/54

    摘要： Provided is a high-strength seamless steel tube, having excellent resistance to sulfide stress cracking (SSC resistance), for oil wells. In particular, the seamless steel tube contains 0.15% to 0.50% C, 0.1% to 1.0% Si, 0.3% to 1.0% Mn, 0.015% or less P, 0.005% or less S, 0.01% to 0.1% Al, 0.01% or less N, 0.1% to 1.7% Cr, 0.4% to 1.1% Mo, 0.01% to 0.12% V, 0.01% to 0.08% Nb, and 0.0005% to 0.003% B or further contains 0.03% to 1.0% Cu on a mass basis and has a microstructure which has a composition containing 0.40% or more solute Mo and a tempered martensite phase that is a main phase and which contains prior-austenite grains with a grain size number of 8.5 or more and 0.06% by mass or more of a dispersed M 2 C-type precipitate with substantially a particulate shape.

    摘要翻译： 本发明提供一种高强度无缝钢管，其具有优良的耐硫化物应力裂纹（SSC性），油井。 特别是，无缝钢管含有0.15％至至0.50％的C，0.1％至1.0％的Si，0.3％至1.0％的Mn，0.015％或更少的P，0.005％或更少的S，0.01％至0.1％的Al，0.01％至 或更低的N，0.1％至1.7％的Cr，0.4％至1.1％的Mo，0.01％至至0.12％的V，0.01％至0.08％至Nb和0.0005〜0.003％B或另外含有0.03％〜1.0％的Cu上的 质量碱，并且具有具有含0.40％以上固溶Mo的组合物和回火马氏体相的显微组织所做的是一个主相和质量以上含有具有8.5以上且0.06％的粒度号原奥氏体晶粒 与近似粒状分散的M 2 C型析出物。