EP2952592B1 - Fertigungsverfahren und fertigungsvorrichtung für nahtlose stahlrohre mit ausgezeichneter zähigkeit - Google Patents

Fertigungsverfahren und fertigungsvorrichtung für nahtlose stahlrohre mit ausgezeichneter zähigkeit Download PDF

Info

Publication number
EP2952592B1
EP2952592B1 EP14746700.5A EP14746700A EP2952592B1 EP 2952592 B1 EP2952592 B1 EP 2952592B1 EP 14746700 A EP14746700 A EP 14746700A EP 2952592 B1 EP2952592 B1 EP 2952592B1
Authority
EP
European Patent Office
Prior art keywords
less
pipe
pipe body
quenching
tempering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14746700.5A
Other languages
English (en)
French (fr)
Other versions
EP2952592A4 (de
EP2952592A1 (de
Inventor
Takeshi Suzuki
Kenichiro Eguchi
Yasuhide Ishiguro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Publication of EP2952592A1 publication Critical patent/EP2952592A1/de
Publication of EP2952592A4 publication Critical patent/EP2952592A4/de
Application granted granted Critical
Publication of EP2952592B1 publication Critical patent/EP2952592B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00Process control or regulation for heat treatments
    • C21D11/005Process control or regulation for heat treatments for cooling
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/001Ferrous alloys, e.g. steel alloys containing N
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/002Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Definitions

  • the present invention relates to a method and a facility for manufacturing a seamless steel pipe excellent in toughness. These are used in particular for manufacturing a product pipe with excellent toughness by performing quenching and tempering, which is thermal refining, on a pipe body, which is an intermediate product (semimanufactured product) of a seamless steel pipe of a steel grade such as stainless steel having a low Ms point (martensitic transformation start temperature) and a low Mf point (martensitic transformation finish temperature).
  • excellent in toughness refers to, for example, the quality of satisfying ISO standard 13680. That is to say, it means that, when a Charpy impact test is performed on three transverse test pieces (in C direction) which are taken from the central part of the wall thickness of a product pipe at a test temperature of -10°C, the average absorbed energy (vE -10 ) of the three test pieces is 40 J or more, and the number of test pieces whose absorbed energy is less than 40 J is one or less, where the absorbed energy thereof is 27 J or more (2/3 or more of the required value of 40 J).
  • Examples of related art for manufacturing a seamless steel pipe include the following techniques.
  • Patent Literature 1 discloses a technique for manufacturing a product having high strength and high toughness by controlling a heating temperature and a cooling rate when a quenching heat treatment is performed in order to manufacture a 13Cr seamless stainless steel pipe having a large wall thickness.
  • Patent Literature 2 discloses a facility for minimizing a decrease in productive efficiency when a quenching treatment is performed on a steel grade on which quenching treatment cannot be performed at a high cooling rate. In the facility, however, the heat treatment is performed on a first-in first-out basis as long as no trouble occurs.
  • Patent Literature 3 discloses a method for manufacturing a seamless steel pipe composed of a martensite-ferrite dual phase steel.
  • Patent Literature 4 discloses a technique for decreasing a variation in hardness in the longitudinal direction of a steel pipe after quenching has been performed using a quenching method in which a quenching liquid is made to flow in one direction through the steel pipe, by controlling the flow rate of the liquid in accordance with the measured values of temperatures of the liquid which are determined on the entrance side and exit side of the pipe.
  • a pipe body which is an intermediate product of a seamless steel pipe of a steel grade of, for example, martensitic stainless steel, is subjected to a heat treatment for quenching and tempering so as to be controlled to at the required level of strength and toughness after having been made into a pipe having a predetermined size by performing tube rolling using hot working.
  • the pipe body is heated to a temperature equal to or higher than the Ac 1 point and equal to or lower than the Ac 3 point in a heating furnace and then rapidly cooled to near room temperature by performing, for example, water cooling first in a quenching treatment, and the rapidly cooled pipe body is heated to a temperature equal to or lower than the Ac 1 point in another heating furnace and then allowed to cool in a subsequent tempering treatment (refer to, for example, Patent Literature 1).
  • a subsequent tempering treatment (refer to, for example, Patent Literature 1).
  • facilities by which such heat treatments are performed are continuously linable, and treatment conditions such as heating temperatures and heating times are respectively set in accordance with various kinds of products.
  • a desired area ratio of a martensite phase is achieved by performing quenching and tempering described above.
  • an Ms point and an Mf point widely vary in accordance with steel chemical composition which characterizes the steel grade, and there is even a steel grade having an Ms point lower than 100°C and an Mf point lower than room temperature.
  • the temperature of the pipe body after quenching has been performed is commonly confirmed by determining the surface temperature thereof.
  • a quenching method and a quenching facility for decreasing a variation in hardness in the longitudinal direction of a pipe body by performing flow control of a quenching liquid are known (refer to, for example, Patent Literature 4), however, there is a problem in that it is difficult to realize not only a decrease in material variability due to non-uniform microstructure distribution in the wall thickness direction of a pipe body of specific steel grades but also the maintenance of a satisfactory productive efficiency for the whole heat treatment line at the same time in the case where the specific steel grades and other steel grades are subjected to a heat treatment in the same heat treatment line as described above.
  • the present inventors diligently conducted investigations in order to solve the problems described above, and as a result, found that there is a significant decrease in material variability described above and that there is an improvement in the average value of data (average value of vE -10 ) within the range of the material variability described above, by discriminating pipe bodies made of steel grades having an Ms point lower than 200°C from pipe bodies made of the other steel grades, and in the case of former, after water cooling has been performed for quenching, by additionally leaving the pipe bodies at room temperature until the temperature difference between the portion having the highest temperature and the portion having the lowest temperature in a cross section in a direction at a right angle to the pipe axis (in the wall thickness direction) becomes less than 2.0°C. In the case of latter, it is appropriate that the pipe bodies be subjected to ordinary quenching and tempering.
  • the present invention has been completed on the basis of the knowledge described above, and the subject matter of the present invention is as follows.
  • Fig. 1 is a schematic plan view illustrating an example of a heat treatment line used for the present invention.
  • Fig. 1 is a schematic plan view illustrating an example of a heat treatment line used for the present invention.
  • a pipe body also called pipe A for convenience
  • a pipe body which has been judged to be a pipe having an Ms point of 200°C or higher
  • a heating furnace for quenching 2 is heated to an appropriate temperature corresponding to its steel grade using a heating furnace for quenching 2, and then cooled so that the temperature of the outer surface of the pipe body becomes almost equal to room temperature by immersing the pipe body in cooling water in a quenching water tank 3.
  • the pipe body is transported through a cooling bed 4 to a heating furnace for tempering 5 in which the pipe body is subjected to a tempering treatment at an appropriate temperature corresponding to its steel grade.
  • the Ms point is calculated using equation (1) described later.
  • a pipe body (also called pipe B for convenience), which has been judged to be a pipe having an Ms point lower than 200°C, is treated in the same pathway as a pipe A is treated until the pipe body is transported to the cooling bed 4.
  • a pipe B is transported to a holding bed (also called buffer line) 6, which is a different pathway from that to which the pipe A is transported, and left at room temperature on the buffer line 6 until the temperature difference (referred to as ⁇ T) between the portion having the highest temperature and the portion having the lowest temperature in a cross section in a direction at a right angle to the pipe axis becomes less than 2.0°C.
  • the pipe B is returned to the cooling bed 4 and subjected to a tempering treatment in the same pathway as the pipe A is treated.
  • the cooling bed 4 and the holding bed 6 are different facilities from each other in the example of the present invention. However, in the case where there is sufficient room on the cooling bed 4, some part of the cooling bed may be used as a holding bed.
  • examples of the specific steel grade described above include, for example, a steel grade having a chemical composition containing, by mass%, C: 0.005% to 0.05%, Si: 0.05% to 1.0%, Mn: 0.2% to 1.8%, P: 0.03% or less, S: 0.005% or less, Cr: 11% to 20%, Ni: 1.5% to 10%, Mo: 1% to 5%, N: 0.15% or less, and the balance being Fe and inevitable impurities.
  • the chemical composition may further contain, by mass%, one, two, or more selected from among Al: 0.002% to 0.05%, Cu: 3.5% or less, Nb: 0.5% or less, V: 0.5% or less, Ti: 0.3% or less, Zr: 0.2% or less, W: 3% or less, B: 0.01% or less, Ca: 0.01% or less, and REM: 0.01% or less instead of some portion of Fe.
  • a martensitic transformation ratio that is, the amount of residual austenite at each position in the wall thickness direction of a pipe body is practically determined by the temperature distribution in the wall thickness direction of the pipe body (temperature distribution in a cross section in a direction at a right angle to the pipe axis) when starting tempering.
  • a difference (variation) in the amount of residual austenite at the positions in the wall thickness direction of the pipe body is non-negligible.
  • Such a variation in the amount of residual austenite is one of the factors which cause the material variability of a product.
  • a pipe B is left at room temperature until ⁇ T becomes less than 2.0°C according to the present invention.
  • the reason why the discrimination criterion for a pipe B is set to be that the pipe has an Ms point lower than 200°C is because it was found that, from the results of the experiments conducted by the present inventors, there is practically no problem with considering that this criterion is almost equivalent to the condition that the pipe has an Mf point lower than room temperature.
  • the Ms point is calculated using equation (1) below which has been derived using regression analysis regarding the relationship between the contents [mass%] of the constituents of the chemical composition of steel and the experimental data of the Ms point which were determined using the thermal expansion curves which were obtained in advance by conducting continuous cooling transformation experiments using thermal expansion test pieces having various chemical compositions for the specified steel grade described above.
  • a waiting time (lead time) from an end of quenching treatment (water cooling) to a start of tempering treatment is set in accordance with the steel grade which is going to be heat-treated.
  • a Ms point is determined in advance using equation (1) above, and a calculation device is prepared by combining measured data of an ambient temperature and surface temperature of a pipe body, and heat-transfer calculation.
  • Steel billets having the chemical compositions and the Ms points, which were calculated using equation (1), given in Table 1 were formed into pipes by performing hot working, and thereafter air-cooled to a temperature of 100°C to room temperature to obtain 10 pipe bodies having an outer diameter of 195.0 mm and a wall thickness of 27.0 mm which were used as starting materials of seamless steel pipes.
  • the pipe bodies were left at room temperature (in atmospheric air) for 8 hours or more, then charged into a heating furnace for tempering when ⁇ T (calculated value) became 1.2°C to 1.8°C , and subjected to a tempering treatment at a temperature of 600°C.
  • ⁇ T (calculated value) was 6.0°C when the pipe bodies were charged into the heating furnace for tempering.
  • V-notched test pieces S1, S2, and S3 which were taken from each of the tempered pipe bodies in accordance with JIS Z 2202 (sampling position was the central part of the wall thickness of the pipe body, the length of the test piece was 10 mm, the longitudinal direction of the test piece was the circumferential direction of the pipe body (C direction), and the depth direction of the V notch was the longitudinal direction of the pipe body (L direction)
  • a Charpy impact test was conducted in accordance with JIS Z 2242 and vE -10 was obtained.
  • Table 2 indicates, in the case of the examples of the present invention, the average value of vE -10 values (the number of the samples was 15) was 87.7 J, where there was no test piece having a vE -10 value of less than 40 J. In addition, the variation in the vE -10 value was very small as indicated by a standard deviation of 3.8 J. On the other hand, in the case of the comparative examples, the average value of the vE -10 values (the number of the samples was 15) was 81.7 J. However, there were two test pieces having a vE -10 value of less than 40 J.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Claims (2)

  1. Verfahren für die Herstellung eines nahtlosen Stahlrohrs, umfassend einen Vorgang zur Durchführung des Vergütens an einem Rohrkörper (1), der ein Zwischenprodukt eines nahtlosen Stahlrohrs mit einer chemischen Zusammensetzung ist, die in Massen-% besteht aus: C 0,005% bis 0,05%, Si: 0,05% bis 1,0%, Mn: 0,2% bis 1,8%, P: 0,03% oder weniger, S: 0,005% oder weniger, Cr: 11% bis 20%, Ni: 1,5% bis 10%, Mo: 1% bis 5%, N: 0,15% oder weniger, wahlweise eines, zwei oder mehr, ausgewählt aus Al: 0,002% bis 0,05%, Cu: 3,5% oder weniger, Nb: 0,5% oder weniger, V: 0,5% oder weniger, Ti: 0,3% oder weniger, Zr: 0,2% oder weniger, W: 3% oder weniger, B: 0,01% oder weniger, Ca: 0,01% oder weniger und REM: 0,01% oder weniger, wobei der Rest Fe und unvermeidliche Verunreinigungen sind, wobei das Verfahren umfasst: im Voraus Bestimmen, ob der Rohrkörper (1) aus einer Stahlsorte mit einem Ms-Punkt unter 200°C hergestellt ist oder nicht; zusätzliches Belassen des Rohrkörpers (1) aus einer Stahlsorte mit einem Ms-Punkt von weniger als 200°C bei Raumtemperatur, bis die Temperaturdifferenz zwischen dem Abschnitt mit der höchsten Temperatur und dem Abschnitt mit der niedrigsten Temperatur in einem Querschnitt in einer Richtung in einem rechtem Winkel zur Rohrachse nach der Abschreckbehandlung weniger als 2,0°C annimmt, und anschließendes Durchführen der Temperbehandlung; und andererseits Durchführen einer Temperbehandlung an dem Rohrkörper (1) einer Stahlsorte, die keinen Ms-Punkt von weniger als 200°C aufweist, ohne den Rohrkörper (1) bei Raumtemperatur zu belassen, nachdem eine Abschreckbehandlung durchgeführt wurde, wobei der Ms-Punkt unter Verwendung der Gleichung (1) berechnet wird: Ms ° C = 502 810 % C 1230 % N 13 % Mn 30 % Ni 12 % Cr 54 % Cu 6 % Mo
    Figure imgb0004
    wobei unter der Annahme, dass M ein Atomsymbol ist, das Symbol (%M) den Gehalt eines konstituierenden chemischen Elements darstellt, das durch das Symbol M in Gleichung (1) dargestellt wird, und (%M) dem Wert 0 zugewiesen wird, für den fall, dass das Symbol M für ein chemisches Element steht, das nicht in dem Stahl enthalten ist.
  2. Anlage zum Herstellen eines nahtlosen Stahlrohrs, umfassend eine Anlage, in der ein Rohrkörper (1), der ein Zwischenprodukt eines nahtlosen Stahlrohrs ist, einem Vergüten unterzogen wird, wobei die Anlage umfasst:
    eine Einrichtung zum Vorausbestimmen auf der Grundlage der in Anspruch 1 angegebenen Gleichung (1), ob der Rohrkörper (1) aus einer Stahlsorte mit einem Ms-Punkt unter 200°C hergestellt ist oder nicht,
    einen Heizofen zum Abschrecken (2),
    einen Abschreckwassertank (3),
    ein Kühlbett (4) und einen Heizofen zum Tempern (5),
    und ein Haltebett (6), in dem der Rohrkörper (1) aus einer Stahlsorte mit einem Ms-Punkt von weniger als 200°C zusätzlich bei Raumtemperatur belassen wird, bis die Temperaturdifferenz zwischen dem Abschnitt mit der höchsten Temperatur und dem Abschnitt mit der niedrigsten Temperatur in einem Querschnitt in einer Richtung rechtwinklig zur Rohrachse geringer wird als 2,0°C, bevor die Temperbehandlung ausgeführt wird.
EP14746700.5A 2013-01-31 2014-01-22 Fertigungsverfahren und fertigungsvorrichtung für nahtlose stahlrohre mit ausgezeichneter zähigkeit Active EP2952592B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013016459A JP5907083B2 (ja) 2013-01-31 2013-01-31 靭性に優れた継目無鋼管の製造方法及び製造設備
PCT/JP2014/000297 WO2014119251A1 (ja) 2013-01-31 2014-01-22 靭性に優れた継目無鋼管の製造方法及び製造設備

Publications (3)

Publication Number Publication Date
EP2952592A1 EP2952592A1 (de) 2015-12-09
EP2952592A4 EP2952592A4 (de) 2016-04-27
EP2952592B1 true EP2952592B1 (de) 2019-06-12

Family

ID=51261968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14746700.5A Active EP2952592B1 (de) 2013-01-31 2014-01-22 Fertigungsverfahren und fertigungsvorrichtung für nahtlose stahlrohre mit ausgezeichneter zähigkeit

Country Status (5)

Country Link
US (1) US20150368734A1 (de)
EP (1) EP2952592B1 (de)
JP (1) JP5907083B2 (de)
CN (1) CN104968808B (de)
WO (1) WO2014119251A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016113794A1 (ja) * 2015-01-15 2016-07-21 Jfeスチール株式会社 油井用継目無ステンレス鋼管およびその製造方法
CN108431246B (zh) 2016-01-13 2020-02-18 日本制铁株式会社 油井用不锈钢管的制造方法及油井用不锈钢管
CN110484814B (zh) * 2019-08-05 2021-05-18 中国科学院金属研究所 一种含稀土航空航天用高强度钢无缝管及其制备方法
CN111304429B (zh) * 2020-04-01 2021-08-27 益大特钢有限公司 一种用于无缝钢管加工用热处理设备

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5739129A (en) * 1980-08-15 1982-03-04 Nippon Kokan Kk <Nkk> Heat-treatment for seamless steel pipe
JPS611922Y2 (de) * 1980-10-14 1986-01-22
JPS6254021A (ja) * 1985-05-23 1987-03-09 Kawasaki Steel Corp 耐硫化物応力腐食割れ性に優れる高強度継目無鋼管の製造方法
DE69525171T2 (de) * 1994-10-20 2002-10-02 Sumitomo Metal Ind Verfahren zum herstellen nahtloser stahlrohre und produktionsanlage dafür
JP3694967B2 (ja) * 1996-04-19 2005-09-14 住友金属工業株式会社 マルテンサイト系ステンレス鋼継目無鋼管の製造方法
JP2001032022A (ja) 1999-07-22 2001-02-06 Sumitomo Metal Ind Ltd 鋼管の焼入れ方法および焼入れ装置
JP3900801B2 (ja) * 2000-07-21 2007-04-04 住友金属工業株式会社 継目無鋼管の熱処理設備
JP2002038219A (ja) * 2000-07-25 2002-02-06 Sumitomo Metal Ind Ltd マルテンサイト系ステンレス鋼管の製造方法
JP5109222B2 (ja) 2003-08-19 2012-12-26 Jfeスチール株式会社 耐食性に優れた油井用高強度ステンレス継目無鋼管およびその製造方法
JP4380487B2 (ja) * 2004-09-28 2009-12-09 住友金属工業株式会社 マルテンサイト系ステンレス鋼管の製造方法
JP4792778B2 (ja) * 2005-03-29 2011-10-12 住友金属工業株式会社 ラインパイプ用厚肉継目無鋼管の製造方法
JP4940970B2 (ja) 2007-01-31 2012-05-30 Jfeスチール株式会社 厚肉13Cr系ステンレス鋼管の製造方法
JP5233366B2 (ja) 2008-03-31 2013-07-10 Jfeスチール株式会社 鋼管の焼入れ設備
WO2010026672A1 (ja) * 2008-09-04 2010-03-11 Jfeスチール株式会社 油井管用マルテンサイト系ステンレス継目無鋼管およびその製造方法
AR075976A1 (es) * 2009-03-30 2011-05-11 Sumitomo Metal Ind Metodo para la manufactura de tuberias sin costura
JP5487689B2 (ja) * 2009-04-06 2014-05-07 Jfeスチール株式会社 油井管用マルテンサイト系ステンレス継目無鋼管の製造方法
US9546408B2 (en) * 2011-03-18 2017-01-17 Nippon Steel & Sumitomo Metal Corporation Quenching method for steel pipe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
JP5907083B2 (ja) 2016-04-20
EP2952592A4 (de) 2016-04-27
EP2952592A1 (de) 2015-12-09
US20150368734A1 (en) 2015-12-24
CN104968808B (zh) 2017-11-17
WO2014119251A1 (ja) 2014-08-07
CN104968808A (zh) 2015-10-07
JP2014148699A (ja) 2014-08-21

Similar Documents

Publication Publication Date Title
EP2933344B1 (de) Wärmebehandlungsanlagenlinie für ein nahtloses stahlrohr und verfahren zur herstellung eines hochfesten rostfreien stahlrohrs
EP3192890B1 (de) Hochfestes nahtloses stahlrohr zur verwendung in ölbohrlöchern und herstellungsverfahren dafür
EP3354755B1 (de) Verfahren zur herstellung eines hochfesten nahtlosen bainitischen stahlrohrs und hochfestes nahtloses bainitisches stahlrohr
JP6197850B2 (ja) 二相ステンレス継目無鋼管の製造方法
EP2796587A1 (de) Hochfestes nahtloses stahlrohr mit hervorragender beständigkeit gegenüber sulfidbedingter spannungsrissbildung für ölbohrloch und verfahren zu seiner herstellung
US11821051B2 (en) Apparatus line for manufacturing seamless steel pipe and tube and method of manufacturing duplex seamless stainless steel pipe
EP3023507B1 (de) Anordnung von vorrichtungen zur herstellung nahtloser stahlrohre sowie verfahren zur herstellung hochfester nahtloser edelstahlrohre für ölbohrungen
EP3088544A1 (de) Heissgepresstes stahlblechelement, herstellungsverfahren dafür und stahlblech zur heisspressung
EP3222742B1 (de) Gewalzter stahlstab oder gewalztes drahtmaterial für kaltgeschmiedete komponente
EP3153597A1 (de) Rohr aus niedriglegiertem stahl für ölbohrloch
EP2952592B1 (de) Fertigungsverfahren und fertigungsvorrichtung für nahtlose stahlrohre mit ausgezeichneter zähigkeit
EP3222743B1 (de) Gewalzter stahlstab oder gewalztes drahtmaterial für kaltgeschmiedete komponente
EP3085801B1 (de) Heissgepresstes stahlblech und verfahren zu dessen herstellung
EP3088547A1 (de) Heissgepresstes stahlblechelement, herstellungsverfahren dafür und heissgepresstes stahlblech
CN106795602A (zh) 厚壁油井用钢管和其制造方法
JP6292142B2 (ja) 油井用高強度ステンレス継目無鋼管の製造方法
JP6315076B2 (ja) 油井用高強度ステンレス継目無鋼管の製造方法
EP3722449B1 (de) Warmgewalztes stahlblech für gewickelte rohre und verfahren zu dessen herstellung
EP3061836B1 (de) Vorrichtungsanordnung zur herstellung eines dicken stahlmaterials und verfahren zur herstellung eines dicken stahlmaterials
JP2003342689A (ja) 中炭素鋼管および低合金鋼管とそれらの製造方法
EP3214189A1 (de) Verfahren zur herstellung von stahl für eine hochfeste hohlfeder

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150831

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

A4 Supplementary search report drawn up and despatched

Effective date: 20160324

RIC1 Information provided on ipc code assigned before grant

Ipc: C21D 9/08 20060101AFI20160318BHEP

Ipc: C22C 38/58 20060101ALI20160318BHEP

Ipc: C22C 38/00 20060101ALI20160318BHEP

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20180215

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190104

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1142614

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190615

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602014048210

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20190612

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190912

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190912

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190913

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1142614

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190612

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191014

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191012

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602014048210

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

26N No opposition filed

Effective date: 20200313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200224

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

PG2D Information on lapse in contracting state deleted

Ref country code: IS

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20200122

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200122

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200122

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200131

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200122

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190612

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20221208

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20221130

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20231212

Year of fee payment: 11