公开(公告)号：JP2013249516A

公开(公告)日：2013-12-12

申请号：JP2012125126

申请日：2012-05-31

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： MIYATA YUKIO ,  ISHIGURO YASUHIDE ,  ISHIKAWA KAZUTOSHI ,  NAKABASHI SATORU

IPC: C21D8/10 ,  C21D9/08 ,  C22C38/00 ,  C22C38/58

CPC classification number: C22C38/54 ,  C21D8/10 ,  C21D8/105 ,  C21D9/08 ,  C21D9/085 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

Abstract: PROBLEM TO BE SOLVED: To provide a method of manufacturing a stainless steel seamless pipe for use as oil well piping that has a wall thickness surpassing 25.4 mm and exhibits high strength, toughness and corrosion resistance.SOLUTION: A stainless steel seamless pipe is obtained by hot rolling a steel material whose composition includes, by mass, 0.005-0.06% of C, 0.05-0.5% of Si, 0.2-1.8% of Mn, 15.5-18.0% of Cr, 1.5-5.0% of Ni, 0.02-0.2% of V, 0.002-0.05% of Al, 0.01-0.15% of N, and 0.006% or less of O, and additionally includes one or more of 1.0-3.5% of Mo, 3.0% or less of W, and 3.5% or less of Cu so as to satisfy [Cr+0.65Ni+0.60Mo+0.30W+0.55Cu-20C≥19.5] and [Cr+Mo+0.50W+0.30Si-43.5C-0.4Mn-Ni-0.3Cu-9N≥11.5]. On this occasion, hot rolling is carried out so as to achieve a total rolling reduction rate of 30% or more in the temperature range of 1100-900°C. After completion of the hot rolling, cooling is carried out, and a hardening-tempering treatment or tempering treatment is performed.

Abstract translation: 要解决的问题：提供一种制造不锈钢无缝管的方法，该无缝管用作油井管道，其壁厚超过25.4mm，具有高强度，韧性和耐腐蚀性。解决方案：通过以下方法获得不锈钢无缝管： 热轧钢材，其组成为：C：0.005〜0.06％，Si：0.05〜0.5％，Mn：0.2〜1.8％，Cr：15.5〜18.0％，Ni：0.02〜0.2 V的％，Al的0.002〜0.05％，N的0.01〜0.15％，O的0.006％以下，另外还含有1.0〜3.5％的Mo，3.0％以下的W和3.5％ 以下，[Cr + 0.65Ni + 0.60Mo + 0.30W + 0.55Cu-20C≥19.5]和[Cr + Mo + 0.50W + 0.30Si-43.5C-0.4Mn-Ni-0.3Cu- 9N≥11.5]。 在这种情况下，进行热轧，以在1100-900℃的温度范围内实现30％以上的总压下率。 热轧结束后，进行冷却，进行淬火回火处理或回火处理。

公开(公告)号：JP2013227611A

公开(公告)日：2013-11-07

申请号：JP2012099769

申请日：2012-04-25

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： YAMADA KATSUMI ,  TANAKA YUJI ,  ISHIGURO YASUHIDE ,  EGUCHI KENICHIRO

IPC: C22C38/00 ,  C21D8/02 ,  C22C38/32 ,  C22C38/54

Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive high strength steel that stably combines high strength of at least YS:120 ksi class and SSC excellent resistance.SOLUTION: A steel includes, by mass, 0.25-0.35% of C; 0.10-0.30% of Si; at most 0.80% of Mn; at most 0.010% of P; at most 0.003% of S; 0.003-0.1% of Al; at most 0.0040% of N; 0.5-0.7% of Cr; 0.5-1.0% of Mo; 0.05-0.8% of Cu; 0.015-0.030% of Ti; 0.005-0.025% of Nb; 0.05-0.10% of V; and 0.0005-0.0015% of B, and includes: a composition that contains P, Ti and N, which are regulated to satisfy P/Ti*

Abstract translation: 要解决的问题：提供一种廉价的高强度钢，其稳定地结合至少YS：120ksi等级的高强度和SSC优异的耐性。解决方案：钢包含质量为0.25-0.35％的C; 0.10-0.30％的Si; 至多0.80％的锰; 至多0.010％的P; 最多0.003％的S; 0.003-0.1％的Al; 最多0.0040％的N; 0.5-0.7％的Cr; 0.5-1.0％的Mo; 0.05-0.8％的Cu; 0.015-0.030％Ti; 0.005-0.025％的Nb; 0.05-0.10％V; 和0.0005-0.0015％的B，并且包括：调节为满足P / Ti * <1.6（其中，Ti *为（有效Ti量）= Ti-3.4×N）的P，Ti和N的组合物） ; 以及由老γ粒子的平均粒径为12μm以下的回火马氏体相构成的结构。

公开(公告)号：JP2013170305A

公开(公告)日：2013-09-02

申请号：JP2012036154

申请日：2012-02-22

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： ISHIGURO YASUHIDE ,  ARAYA MASATOSHI ,  SATO AKIO

IPC: C23C22/73 ,  C21D7/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/58 ,  C23C22/07

Abstract: PROBLEM TO BE SOLVED: To provide a simple method for determining chemical conversion treatability of steel, and a method for producing steel excellent in chemical conversion treatability utilizing the same.SOLUTION: Target steel is immersed in a chemical solution (chemical conversion treatment solution), and the immersing potential of the steel is continuously measured from the start of immersion to measure the time required for the immersing potential of the steel to be the same as the natural immersing potential in the chemical solution. The obtained time is compared with the appropriate treatment time determined for performing the chemical conversion treatment of steel using a chemical solution (chemical conversion treatment solution) to be used, and when the obtained time is 2/3 or less of the appropriate treatment time, the steel is determined to be steel excellent in chemical conversion treatability. Further, when the method for determining the chemical conversion treatability of steel is used to determine the chemical conversion treatability of target steel, and the steel is determined to be steel poor in chemical conversion treatability, improvement treatment of the chemical conversion treatability is performed to form steel excellent in chemical conversion treatability. A preferred improvement treatment of chemical conversion treatability includes the treatment of applying cold rolling, a shot blast, pickling, polishing/grinding, and the like.

Abstract translation: 要解决的问题：提供一种用于确定钢的化学转化处理性的简单方法，以及利用该钢的化学转化处理性优异的钢的生产方法。溶液：将目标钢浸入化学溶液（化学转化处理溶液）中， 并且从浸渍开始连续地测量钢的浸渍电位，以测量钢的浸渍电位与化学溶液中的天然浸渍电位相同所需的时间。 将获得的时间与使用要使用的化学溶液（化学转化处理溶液）进行钢的化学转化处理所确定的适当的处理时间进行比较，并且当获得的时间为适当处理时间的2/3以下时， 钢被确定为具有优异的化学转化处理性的钢。 此外，当使用用于确定钢的化学转化处理性的方法来确定目标钢的化学转化处理性，并且钢被确定为钢在化学转化处理性方面较差时，进行化学转化处理性的改进处理以形成 钢优良的化学转​​化处理性。 化学转化处理性的优选改进处理包括冷轧，喷丸，酸洗，抛光/研磨等的处理。

公开(公告)号：JP2009233678A

公开(公告)日：2009-10-15

申请号：JP2008079401

申请日：2008-03-26

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： OKABE YOSHITOMO ,  KAWABATA YOSHIKAZU ,  TOYODA SHUNSUKE ,  ISHIGURO YASUHIDE ,  SAKATA TAKASHI

IPC: B23K13/00 ,  B21C37/08 ,  B21C51/00 ,  B23K13/08

Abstract: PROBLEM TO BE SOLVED: To manufacture an electric resistance welded tube having very excellent welding quality by measuring the length of a narrow space part from a welding point to a V-converging position with high accuracy, and setting the welding heat input so that the length of the narrow space part becomes optimum.
SOLUTION: The image of a part in a vicinity of a welding point 3 of a workpiece 10 is continuously picked up for the time of ≥10ms at the image pickup speed of ≤1/200 second by a high speed camera 6, the length of a narrow space part 4 from the welding point 3 to the V-converging position 7 is measured based on the picked-up image. The welding heat input of the electric resistance welding is adjusted so that the measured length L(mm) of the narrow space part satisfies the inequalities (1) 0.259t+0.013d-0.00548v-6.16

Abstract translation: 要解决的问题：通过以高精度测量从焊接点到V形聚集位置的窄空间部分的长度，制造具有非常优良焊接质量的电阻焊管，并将焊接热输入设定为 狭窄空间部分的长度变得最佳。 解决方案：通过高速摄像机6，以≤1/ 200秒的摄像速度连续地拾取工件10的焊接点3附近的部分的图像≥10ms的时间， 基于拍摄图像测量从焊点3到V会聚位置7的窄空间部分4的长度。 调整电阻焊接的焊接热输入，使得窄空间部分的测量长度L（mm）满足不等式（1）0.259t + 0.013d-0.00548v-6.16

公开(公告)号：JP2019027990A

公开(公告)日：2019-02-21

申请号：JP2017149960

申请日：2017-08-02

Applicant: JFE STEEL CORP

Inventor： MIZUNO DAISUKE ,  ISHIGURO YASUHIDE

IPC: G01N17/00

Abstract: 【課題】油井やガス井に用いる油井管の深さに応じた腐食環境の差を簡便に求め、この深さによる環境条件の違いに応じて最適な鋼材を選定する。【解決手段】井戸の深さに応じて硫化物応力割れ感受性が異なる複数の油井管を使用するものとし、その際、該井戸の深さによる温度分布を考慮して、使用する複数の油井管用鋼材に硫化物応力割れが発生する臨界pHと同じpHとなる温度をそれぞれ推定し、これらの温度となる深さ位置を油井管の切替深度として、最深部に用いる油井管用鋼材よりも、より浅い領域に用いる油井管用鋼材として、順次、硫化物応力割れ試験(SSC試験)における硫化物応力割れ感受性が低い鋼材を選定する。【選択図】図2

公开(公告)号：JP2014114500A

公开(公告)日：2014-06-26

申请号：JP2012271180

申请日：2012-12-12

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： EGUCHI KENICHIRO ,  ISHIGURO YASUHIDE

IPC: C21D9/08 ,  C22C38/00 ,  C22C38/58

CPC classification number: 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

Abstract: PROBLEM TO BE SOLVED: To provide a production method of a high strength stainless steel pipe that is for imparting a stable product quality to a high Cr based seamless steel pipe in which hardening and temper treatments are performed; and a heat treatment equipment line of the high strength stainless steel pipe.SOLUTION: In online heat treatment equipment of a seamless steel pipe, low temperature cooling equipment 4 in which cooling can be performed to at most 20°C is disposed in one end or a part of a heat treatment carrier line 3 disposed between hardening equipment 2 and a temper heating furnace 5, in a heat treatment of a steel pipe including Cr of at least 14%, hardening cooling to at least 50°C is performed, continuously cooling to at least 20°C is performed, then a temper treatment is performed, and a stable quality high strength stainless steel pipe is produced.

Abstract translation: 要解决的问题：提供一种高强度不锈钢管的制造方法，其用于对进行硬化和回火处理的高Cr类无缝钢管赋予稳定的产品质量; 和高强度不锈钢管的热处理设备线。解决方案：在无缝钢管的在线热处理设备中，将冷却至多20℃的低温冷却设备4设置在一端或 设置在硬化设备2和回火加热炉5之间的热处理载体管线3的一部分，在包括至少14％的Cr的钢管的热处理中，淬火冷却至至少50℃，连续冷却 至少20℃，然后进行回火处理，并且生产稳定质量的高强度不锈钢管。

公开(公告)号：JP2013032584A

公开(公告)日：2013-02-14

申请号：JP2012145097

申请日：2012-06-28

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： ISHIGURO YASUHIDE ,  KIMURA MITSUO ,  EGUCHI KENICHIRO ,  YOKOGAWA HIROSHI ,  KATAGIRI TADAO ,  TANAKA MASATO

IPC: C22C38/00 ,  C21D9/08 ,  C22C38/14 ,  C22C38/58

CPC classification number: C21D9/085 ,  C21D1/25 ,  C21D1/63 ,  C21D8/105 ,  C21D2261/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/28 ,  C22C38/38 ,  C22C38/40 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  F16L9/02

Abstract: PROBLEM TO BE SOLVED: To provide a thick-walled high-strength seamless steel pipe having excellent sour resistance.SOLUTION: The steel pipe is obtained by subjecting a raw steel pipe to quenching and tempering to regulate the treated steel pipe so as to have a yield strength exceeding 450 MPa and at least the outermost surface or innermost surface of the pipe so as to have Vickers hardness HV5, which can be measured at a load of 5 kgf (testing force, 49 N), of 250 HV5 or less. This regulation is accomplished by subjecting the steel pipe which has been quenched to working processing in which the surface layer of the steel pipe is ground by 0.3 mm or more in depth, in the thickness direction, from the surface. Alternatively, the regulation is attained by conducting the quenching in such a manner that the raw steel pipe is held in the air atmosphere at an elevated temperature not lower than the Ac3 transformation point for 120 seconds or longer and thereafter the steel pipe is water-cooled in a nucleate boiling state or is water-cooled first in a film boiling state and then in a nucleate boiling state. With such quenching, it is possible to obtain a steel pipe in which each surface layer has hardness reduced to the value of 250 HV5 or below and which has an M-shaped hardness distribution in which a position where the hardness is maximum is present at a position on the way to the center of the wall thickness from the surface, or to obtain a steel pipe that has a U-shaped or flat hardness distribution in which the hardness of the surface layers is highest but not higher than the value of 250 HV5. Thus, the obtained steel pipe has significantly improved sour resistance.

Abstract translation: 要解决的问题：提供具有优异耐酸性的厚壁高强度无缝钢管。 解决方案：钢管是通过对生钢管进行淬火和回火来调节经处理的钢管，以获得屈服强度超过450MPa，并且至少管的最外表面或最内表面为 具有维氏硬度HV5，其可以在5kgf（测试力，49N）的负载下测量为250HV5以下。 该调整是通过对被淬火的钢管进行从表面到厚度方向的深度处理钢管表面层的加工处理的0.3mm以上的处理。 或者，通过进行淬火，使原料钢管在不低于Ac 3相变点的升高温度下保持在空气气氛中120秒以上，然后将钢管水冷 处于核沸腾状态，或首先在薄膜沸腾状态下水冷却然后处于成核沸腾状态。 通过这样的淬火，可以获得其表面层的硬度降低到250HV5以下的钢管，并且具有M形硬度分布，其中硬度最大的位置存在于 从表面到达壁厚中心的位置，或获得具有U形或平坦硬度分布的钢管，其中表面层的硬度最高但不高于250 HV5的值 。 因此，所获得的钢管具有显着改善的耐酸性。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2010090442A

公开(公告)日：2010-04-22

申请号：JP2008262062

申请日：2008-10-08

Applicant: Honda Motor Co Ltd ,  Jfe Steel Corp ,  Jfeスチール株式会社 ,  本田技研工業株式会社

Inventor： ISHIGURO YASUHIDE ,  SATO AKIO ,  SHIMIZU YASUHISA

IPC: C22C38/00 ,  B21C37/08 ,  C21D8/10 ,  C22C38/06 ,  C22C38/58

CPC classification number: B21C37/08 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/38

Abstract: PROBLEM TO BE SOLVED: To provide a high workability and high strength steel pipe having excellent chemical treatment property, and to provide a method for producing the same.
SOLUTION: When a steel plate comprising, by mass, ≥0.05% C, >0.7% Si and ≥0.8% Mn is used as a mother plate, and is worked into a pipe shape, the total of the absolute values of surface strain in the circumferential direction respectively applied in each step of the working is controlled to ≥5% by nominal strain. In this way, even if a welded steel pipe is produced using a steel plate comprising >0.7% Si, the steel pipe having satisfactory chemical treatment property is obtained without performing mechanical grinding, chemical pickling treatment or the like.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供具有优异的化学处理性能的高加工性和高强度钢管，并提供其制造方法。 解决方案：当使用质量分数为≥0.05％C，> 0.7％Si和≥0.8％Mn的钢板作为母板时，加工成管状， 在工作的每个步骤中分别施加的圆周方向的表面应变通过标称应变被控制为≥5％。 以这种方式，即使使用含有> 0.7％Si的钢板制造焊接钢管，也可以在不进行机械磨削，化学酸洗处理等的情况下获得具有令人满意的化学处理性能的钢管。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2010089127A

公开(公告)日：2010-04-22

申请号：JP2008262054

申请日：2008-10-08

Applicant: Honda Motor Co Ltd ,  Jfe Steel Corp ,  Jfeスチール株式会社 ,  本田技研工業株式会社

Inventor： ISHIGURO YASUHIDE ,  SATO AKIO ,  SHIMIZU YASUHISA

IPC: B21D1/00 ,  B21C37/08 ,  C21D9/46 ,  C22C38/00 ,  C22C38/06 ,  C22C38/58

CPC classification number: C23C22/78 ,  B21C37/08 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/38

Abstract: PROBLEM TO BE SOLVED: To provide a working method of a high-strength member having a higher Si-content than 0.7 mass%.
SOLUTION: Working process is applied to a high-strength steel material containing ≥0.05 mass% C, >0.7 mass% Si and ≥0.8 mass% Mn, to form a member with a predetermined shape, wherein working amount is adjusted such that sum of absolute values of surface strains in a predetermined direction respectively imparted in each process of working is 5% or more in a nominal strain. Even when Si is contained in an amount of >0.7 mass%, the member is made to have a remarkably improved chemical conversion property without specifically carrying out mechanical grinding, chemical pickling processing or the like.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供具有比0.7质量％高的Si含量的高强度部件的加工方法。 解决方案：将工作过程应用于含有≥0.05质量％C，> 0.7质量％Si和≥0.8质量％Mn的高强度钢材，以形成具有预定形状的构件，其中将工作量调整为 在每个工作过程中分别赋予的预定方向上的表面应变的绝对值之和在标称应变中为5％以上。 即使在Si含量为> 0.7质量％的情况下，也可以在不特别进行机械研磨，酸洗处理等的情况下使化学转化性显着提高。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2014012890A

公开(公告)日：2014-01-23

申请号：JP2013118441

申请日：2013-06-05

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： EGUCHI KENICHIRO ,  ISHIGURO YASUHIDE ,  OKATSU MITSUHIRO ,  SUGANO YOSHIYUKI ,  MIYATA YUKIO

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

Abstract: 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.

Abstract translation: 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。