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    • 11. 发明专利
    • Seamless pipe of martensitic stainless steel for oil well pipe and process for producing the same
    • 用于油管的马氏体不锈钢的无缝管及其生产方法
    • JP2010168646A
    • 2010-08-05
    • JP2009202744
    • 2009-09-02
    • Jfe Steel CorpJfeスチール株式会社
    • EGUCHI KENICHIROMIYATA YUKIOKIMURA MITSUO
    • C22C38/00C21D9/08C22C38/48C22C38/58
    • PROBLEM TO BE SOLVED: To provide a seamless pipe for an oil well pipe having high strength including a yield stress YS in the 95-ksi class (665-758 MPa) and excellent low-temperature toughness in combination, and to provide a process for producing the same. SOLUTION: A seamless stainless-steel pipe having a composition containing, by mass, ≤0.020% C, 10 to 14% Cr, ≤3% Ni, ≤0.05% N, and 0.03 to 0.2% Nb, or further containing ≤1.0% Si, 0.1 to 2.0% Mn and ≤0.10% Al is subjected to quenching in which the pipe is heated to a quenching temperature not lower than the A c3 transformation point and then cooled to a temperature range of 100°C or lower at a cooling rate not lower than those of air cooling and, subsequently to the quenching, to tempering in which the pipe is heated to a tempering temperature not lower than 550°C and then cooled. This seamless pipe. Thus, the seamless pipe of martensitic stainless steel for an oil well pipe which has a tempered martensitic structure in which the amount of niobium precipitated is 0.020% or larger, and has high strength including the yield strength in the 95-ksi class and excellent low-temperature toughness having a vTrs of -40°C or lower in combination and can be subjected to warm straightening, is obtained. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种具有高强度的油井管的无缝管,其中包括95-ksi级(665-758MPa)的屈服应力YS和组合的优异的低温韧性,并且提供 其制造方法。 解决方案:一种无缝不锈钢管,其组成含有质量分数为含有≤0.020%C,10-14%Cr,≤3%Ni,≤0.05%N和0.03-0.2%Nb,或进一步含有 将≤1.0%的Si,0.1〜2.0%的Mn和≤0.10%的Al进行淬火,其中将管加热至不低于A c3 相变点的淬火温度,然后冷却至温度 范围为100℃以下,冷却速度不低于空气冷却的冷却速度,随后进行淬火,回火后将管道加热至不低于550℃的回火温度,然后冷却。 这种无缝管。 因此,具有铌的析出量为0.020%以上的回火马氏体组织的油井管马氏体不锈钢的无缝管,具有95kS级的屈服强度和优异的低强度 - 组合温度为-40℃或更低的温度韧性,并且可以进行热矫正。 版权所有(C)2010,JPO&INPIT
    • 12. 发明专利
    • Low alloy high strength seamless steel pipe for oil well having excellent sulfide stress corrosion cracking resistance and its manufacturing method
    • 低合金高强度无缝钢管,具有优异的硫酸应变腐蚀开裂电阻及其制造方法
    • JP2014012890A
    • 2014-01-23
    • JP2013118441
    • 2013-06-05
    • Jfe Steel CorpJfeスチール株式会社
    • EGUCHI KENICHIROISHIGURO YASUHIDEOKATSU MITSUHIROSUGANO YOSHIYUKIMIYATA YUKIO
    • C22C38/00C21D9/08C22C38/32C22C38/54
    • PROBLEM TO BE SOLVED: To provide a low alloy high strength seamless steel pipe for an oil well having excellent sulfide stress corrosion cracking resistance and its manufacturing method.SOLUTION: A seamless steel pipe contains a composition comprising, 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 0.10%, N:0.01% or less, Cr:0.1 to 1.7%, Mo:0.4 to 1.1%, V:0.01 to 0.12%, Nb:0.01 to 0.08%, Ti:0.005 to 0.03% and B:0.0005 to 0.0030% and has each segregation degree of Mn, Mo and Cr in a segregation part of 1.5 or less. A manufacturing method of the seamless steel pipe includes applying, to the seamless steel pipe, segregation lowering treatment for heating the seamless steel pipe at T (°C) in range of 1100°C to 1300°C and maintaining for a definite period of time and then cooling it, and thereafter, applying hardening treatment one or more times and then tempering treatment.
    • 要解决的问题:提供一种具有优异的耐硫化物应力腐蚀开裂性的油井的低合金高强度无缝钢管及其制造方法。无缝钢管含有以质量%计含有C:0.15〜 0.50%,Si:0.1〜1.0%,Mn:0.3〜1.0%,P:0.015%以下,S:0.005%以下,Al:0.01〜0.10%,N:0.01%以下,Cr:0.1〜1.7 %,Mo:0.4〜1.1%,V:0.01〜0.12%,Nb:0.01〜0.08%,Ti:0.005〜0.03%,B:0.0005〜0.0030%,偏析Mn,Mo,Cr的偏析度 部分为1.5以下。 无缝钢管的制造方法包括向无缝钢管施加在1100℃〜1300℃的T(℃)下加热无缝钢管的偏析降低处理,并保持一定时间 然后冷却,然后进行一次或多次硬化处理,然后进行回火处理。
    • 13. 发明专利
    • Hot-rolled steel sheet excellent in surface quality and ductile crack propagation property and manufacturing method therefor
    • 表面质量优良的热轧钢板和DUCTILE CRACK传播性能及其制造方法
    • JP2013047392A
    • 2013-03-07
    • JP2012224674
    • 2012-10-10
    • Jfe Steel CorpJfeスチール株式会社
    • EGUCHI KENICHIRONAKADA HIROSHIKAMI TSUTOMU
    • C21D8/02B21B1/26C22C38/00C22C38/14C22C38/58
    • PROBLEM TO BE SOLVED: To provide a method for manufacturing a hot-rolled steel sheet excellent in surface quality, and excellent in a ductile crack propagation property.SOLUTION: The method comprises preparing a steel raw material including C: 0.02 to 0.08%, Nb: 0.03 to 0.10%, Ti: 0.005 to 0.05% and a properly adjusted amount of Si, Mn, P, S, Al, N, and then applying a rough rolling process, a finish rolling process and a winding-up process. After the rough rolling process and before the finish rolling process or during the finish rolling process, acceleration quenching is applied which quenches rapidly a surface layer at a cooling speed of 50°C/s or more until it reaches the temperature below the Artransformation point, and then this acceleration quenching is stopped. Thereafter, the finish rolling is applied at a condition that the reduction ratio per one pass is limited to (1.1× uniform elongation)% or below. Thereby, a high tension hot-rolled steel sheet excellent in the surface quality and excellent in toughness, especially the ductile crack propagation property can be manufactured.
    • 待解决的问题:提供一种表面质量优异,延展性裂纹扩展性优异的热轧钢板的制造方法。 解决方案:该方法包括制备包括C:0.02〜0.08%,Nb:0.03〜0.10%,Ti:0.005〜0.05%,适当调整量的Si,Mn,P,S,Al, N,然后进行粗轧工序,精轧工序和清理工序。 在粗轧过程之后和精轧过程之前或精轧过程中,进行加速淬火,其以50℃/ s以上的冷却速度快速淬火表面层,直到其达到低于Ar 3 转换点,然后停止加速淬火。 此后,在每次通过的压下率被限制为(1.1×均匀伸长率)%以下的条件下进行精轧。 由此,可以制造表面质量优异,韧性优异,特别是延性裂纹扩展性优异的高张力热轧钢板。 版权所有(C)2013,JPO&INPIT
    • 19. 发明专利
    • БЕСШОВНАЯ ВЫСОКОПРОЧНАЯ ТРУБА ИЗ НЕРЖАВЕЮЩЕЙ СТАЛИ НЕФТЕПРОМЫСЛОВОГО СОРТАМЕНТА И СПОСОБ ЕЁ ИЗГОТОВЛЕНИЯ
    • RU2716438C1
    • 2020-03-12
    • RU2019126391
    • 2018-01-23
    • JFE STEEL CORP
    • KAMO YUICHIYUGA MASAOEGUCHI KENICHIROISHIGURO YASUHIDE
    • C22C38/54
    • Изобретениеотноситсяк областиметаллургии, аименнок бесшовнойвысокопрочнойтрубенефтепромысловогосортаментаизнержавеющейстали. Трубаимеетпределтекучести 862 МПаилиболееи состав, содержащий, мас.%: С: 0,05 илименее, Si: 0,5 илименее, Mn: 0,15-1,0, P: 0,030 илименее, S: 0,005 илименее, Cr: 14,5-17,5, Ni: 3,0-6,0, Мо: 2,7-5,0, Cu: 0,3-4,0, W: 0,1-2,5, V: 0,02-0,20, Al: 0,10 илименее, N: 0,15 илименее, B: 0,0005-0,0100, остальное - Fe инеизбежныепримеси. Длякомпонентовсталивыполняютсяследующиеусловия: -5,9×(7,82+27C-0,91Si+0,21Mn-0,9Cr+Ni-1,1Mo+0,2Cu+11N)≥13,0 и Cu+Mo+W+Cr+2Ni≤34,5, где C, Si, Mn, Cr, Ni, Мо, Cu, W и N представляютсодержаниекаждогоэлемента, мас.%. Трубаимеетструктуру, содержащуюболее 45 об.% фазымартенситав качествепервичнойфазы, 10–45 об.% фазыферритаи 30 об.% илименеефазыостаточногоаустенитав качествевторичнойфазы. Зёрнаферрита, измеренныеметодомдифракцииобратногорассеянияэлектроновв непрерывнойобласти 100 мм,имеютразмер 500 мкмилименее, приэтомзёрнас разностьюориентировкикристалловнеболее 15° представляютоднии тежезёрна. Обеспечиваетсявысокаянизкотемпературнаяударнаявязкость, коррозионнаястойкостьк диоксидууглерода, стойкостьк сульфидномукоррозионномурастрескиваниюподнапряжением (SCC) истойкостьк сульфидномурастрескиваниюподнапряжением (SSC). 2 н. и 3 з.п. ф-лы, 2 табл.