EP3033186B1 - Verfahren zur herstellung eines vergüteten nahtlos warmgefertigten stahlrohres - Google Patents

Verfahren zur herstellung eines vergüteten nahtlos warmgefertigten stahlrohres Download PDF

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Publication number
EP3033186B1
EP3033186B1 EP14752294.0A EP14752294A EP3033186B1 EP 3033186 B1 EP3033186 B1 EP 3033186B1 EP 14752294 A EP14752294 A EP 14752294A EP 3033186 B1 EP3033186 B1 EP 3033186B1
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EP
European Patent Office
Prior art keywords
pipe
diameter
tempering
cooling
temperature
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
EP14752294.0A
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German (de)
English (en)
French (fr)
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EP3033186A1 (de
Inventor
Christof DELHAES
Heiko Hansen
Rolf Kümmerling
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.)
Vallourec Deutschland GmbH
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Vallourec Deutschland GmbH
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Publication date
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Priority to PL14752294T priority Critical patent/PL3033186T3/pl
Publication of EP3033186A1 publication Critical patent/EP3033186A1/de
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/085—Cooling or quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
    • C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/14—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/08—Diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling

Definitions

  • the invention relates to a method for producing a quenched, seamless hot-rolled steel tube, in which a hollow block heated to forming temperature is rolled to a tube with a finished diameter after rolling in a rolling mill and subsequently annealed and the diameter of the tube grows during the annealing with corresponding compensation parameters ,
  • the tube expands when heated and a subsequent obstruction of shrinkage, inter alia, in the structural transformation during the quenching process can also affect the diameter of the finished tube.
  • US 2009/0038358 A1 - describes a method for the production of seamless tubes, wherein the tube have improved mechanical properties and a large-scale energy savings are to be made possible by a continuous process from the cross rolling to the heat treatment.
  • a sizing roll is carried out at a temperature in the range of 600 to 800 degrees C and selected for subsequent reheating at least 440 degrees C as the inlet temperature of the steel pipe.
  • the object of the invention is to provide a production method for quenched seamlessly hot-rolled steel tubes, which allows a more economical production of such pipes while maintaining the geometric requirements for the quenched finished tube.
  • US 2009/0038358 A1 - describes a method for the production of seamless tubes, wherein the tube have improved mechanical properties and a large-scale energy savings are to be made possible by a continuous process from the cross rolling to the heat treatment.
  • a sizing roll is carried out at a temperature in the range of 600 to 800 degrees C and selected for subsequent reheating at least 440 degrees C as the inlet temperature of the steel pipe.
  • a method for producing a quenched, seamless hot-rolled steel tube in which a warmed to forming temperature hollow block is rolled into a tube with a finished diameter after rolling in a rolling mill and subsequently annealed and during the annealing with appropriate compensation parameters of the diameter the tube increases, thereby improving that, with knowledge of the diameter growth of the tube when tempering the finished diameter of the tube to be annealed after rolling in the rolling mill is adjusted, that the annealing consists of heating in a furnace, then continuous cooling in a cooling section and a tempering process , the compensation parameters are set on the basis of the range of previously determined relationships between diameter, pipe wall thickness, material quality, compensation parameters and diameter growth, and then based on the measured finished diameter of the currently rolled tube, the tempering parameters are finely adjusted with respect to the target diameter of the tube to be achieved after tempering.
  • the innovative approach of the invention is that the knowledge of the influence of the compensation parameters on the diameter changes of the tube by the annealing for different material grades and dimensions (diameter, wall thickness) is used to determine the finished diameter for the rolling mill.
  • This process is particularly advantageous and safe to manufacture if the tempering of the currently measured target diameter of the pipes to be coated is available in the pipe mill and the specifications for the selected manipulated variables are finely adjusted due to the dependencies of the diameter growth on the pipe material and the quenching parameters.
  • the compensation parameters are set in such a way that a pipe having a target diameter which corresponds to a finished diameter after tempering within a predetermined tolerance range is produced.
  • the parameters which have an influence on the cooling rate of the tube heated to austenitizing temperature are to be understood as the tempering parameters.
  • the quenching of the heated tube is carried out according to the invention by means of a continuous cooling, as only in this type of cooling can be specifically influenced on the cooling rate and thus on the change in diameter. Also important is the measurement and control of the influencing cooling parameters.
  • a further simplification of the production process is achieved in that the finished diameter is achieved after tempering without the aid of mills.
  • the proposed method has the advantage that can be dispensed with the method after the tempering of the pipe with this method, so that on the one hand significantly reduces the cost and on the other hand, the investment for the expensive sizing mill and the associated costs of maintenance and energy can be avoided.
  • cheaper materials can be used for various material grades and lower tempering furnace temperatures can be achieved with correspondingly lower energy consumption.
  • a higher tempering temperature is necessary for the sizing, because the tube must be plastically deformed and the elastic spring back is to be kept small.
  • a so-called "richer" starting material with a higher content of alloy constituents must again be used than is necessary.
  • the setting of the target diameter after annealing is done as before. However, this is not achieved by a sizing after tempering but by a combination of finished diameter of the rolling mill after rolling and a targeted set diameter growth during annealing.
  • a particular simplification of the manufacturing process can be achieved in that, knowing the diameter growth of the tube when tempering a group of tube types with the same nominal diameter but different wall thicknesses, material grades or specifications is determined, set for a uniform finished diameter of the pipe to be tempered after rolling becomes.
  • different types of tubes can be rolled with a uniform finished diameter of the pipe to be tempered after rolling, although these types of tubes have different target diameter after tempering.
  • At least the number of finished diameters of the tube to be coated after rolling can be minimized by a corresponding group formation of tube types and thus the frequency of retrofitting the rolling mill can be minimized.
  • the compensation parameters are set in such a way that, starting from the uniform finish diameter, a tube with its target diameter is produced for each tube type in the group.
  • the finished diameter of the tube is measured after rolling and used as an input for tempering.
  • the target diameter of the tube is adjusted after tempering by changing the cooling rate in the cooling section.
  • the tube heated to austenitizing temperature and continuously transported via a roller table is usually quenched by means of stationary application of water to the final temperature to be reached.
  • the temperature of the cooling water, the intensity of the water cooling as quantity per unit of time, and the transport speed of the pipe via the roller table must be mentioned as significant factors influencing the height of the cooling rate.
  • the parameters of the quenching process if in the external cooling the amount of water applied to the pipe to be cooled controllably between 50 and 300m 3 / h, the cooling water temperature below 40 ° C and the transport speed of the tube in the cooling section to values between 0 , 1 and 1 m / s.
  • the amount of cooling water should be between 50 and 250 m 3 / h.
  • the internal cooling is preferably realized via a lance insertable into the tube.
  • the heating for hardening or austenitizing also in take place an oven, which has at least two zones over the furnace length and of which the first serves for heating and the second for temperature compensation in the tube.
  • the heating takes place for hardening or austenitizing the tube in a first furnace and for equalizing the temperature in the tube in a second furnace.
  • the heating for hardening or austenitizing takes place in a lifting beam furnace with three zones, the first zone for preheating, the second zone for heating and the third zone for temperaure compensation in the pipe and wherein the different zones in one or more ovens can be located.
  • the holding time should be at austenitizing temperature at least 3 minutes, with the holding time then begins when the lowest temperature reached in the pipe reaches the value "pipe set temperature minus 20 ° C". In this way, optimal starting conditions for homogeneous material properties of the tube are created after the subsequent quenching process.
  • FIG. 1 shows schematically how the method according to the invention is applied to set a uniform finished diameter for the mill for different target diameter to be achieved after tempering.
  • target diameter is meant a target size.
  • the finished diameter after the rolls or the finished diameter after tempering is understood as a certain actual size.
  • the FIG. 1 shows diameter values or ranges of five exemplary tube types which are qualitatively defined by the influencing factors wall thickness W, material quality G and specification S. Under material quality G are essentially the material properties and S specification essentially the dimensions and tolerances to understand.
  • the minimum and maximum diameter growth in absolute values is now determined for each type of pipe and applied starting from the target diameter after tempering in the sense of a diameter reduction.
  • the minimum diameter growth is registered in the form of the white area with the legend "minimum growth of the tube diameter during annealing" and results for this type of tube from the minimum required compensation parameters such as a minimum cooling rate to achieve the desired target structure during annealing.
  • the finished diameter of the rolling mill is now set to a value within the "allowed range for the diameter before tempering", preferably in the middle of the "allowed range for the diameter before annealing".
  • All five tube types can now be rolled uniformly on this rolling mill and the end diameters differing from each other after tempering are achieved by a corresponding adjustment of the tempering parameters.
  • the "allowed range for the diameter before annealing” has a sufficient bandwidth to account for any manufacturing tolerances.
  • the resulting "allowed range for the diameter before annealing" is very narrow or there is no corresponding area in the sense of a cut area. In this case, then the groups are to be chosen differently or to form subgroups of pipe types, for which then again results in a "permitted range for the diameter before annealing" with a sufficient bandwidth.
  • FIGS. 2 to 5 show by way of example the dependence of the diameter growth of the tube on the tempering parameters, in particular the cooling parameters.
  • the adapted quenching parameters in particular the pipe speed, the volume flow and with or without internal cooling, it is possible for the same finished diameter of the rolling mill, which is within predetermined tolerances of, for example +/- 0.5%, the desired target diameter after tempering depending on the type of pipe to reach.
  • FIG. 2 shows how the growth of the diameter during tempering depends on the diameter size increases at a constant pipe wall thickness for a material family A from the oil field pipe area (OCTG).
  • the throughput speed of the pipe through the cooling section is kept constant at 35% of the maximum value, the quenching conditions on the outside ie the amount of water, the number of ring showers and the water pressure.
  • the pipes were also quenched inside with a constant amount of water per time.
  • FIG. 3 shows the same dependency as in FIG. 2 however, without additional internal cooling and for a selected flow rate of 22% of the maximum value.
  • FIGS. 4 and 5 For example, the minimum and maximum growth are shown within practicable values for the tempering parameters, such as flow rate and "with" or "without” internal cooling.
  • the nominal size 406.4 x 14.6 mm results FIG. 5 a minimum growth of the diameter of 0.9 mm and out FIG. 4 a maximum of 1.46 mm.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Steel (AREA)
EP14752294.0A 2013-08-14 2014-08-11 Verfahren zur herstellung eines vergüteten nahtlos warmgefertigten stahlrohres Active EP3033186B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14752294T PL3033186T3 (pl) 2013-08-14 2014-08-11 Sposób wytwarzania ulepszanej, bezszwowej, wykańczanej na gorąco rury stalowej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013108803.1A DE102013108803A1 (de) 2013-08-14 2013-08-14 Verfahren zur Herstellung eines vergüteten nahtlos warmgefertigten Stahlrohres
PCT/EP2014/067170 WO2015022294A1 (de) 2013-08-14 2014-08-11 Verfahren zur herstellung eines vergüteten nahtlos warmgefertigten stahlrohres

Publications (2)

Publication Number Publication Date
EP3033186A1 EP3033186A1 (de) 2016-06-22
EP3033186B1 true EP3033186B1 (de) 2017-07-12

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EP14752294.0A Active EP3033186B1 (de) 2013-08-14 2014-08-11 Verfahren zur herstellung eines vergüteten nahtlos warmgefertigten stahlrohres

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Country Link
US (1) US10100384B2 (ru)
EP (1) EP3033186B1 (ru)
AR (1) AR097813A1 (ru)
BR (1) BR112016000039B1 (ru)
DE (1) DE102013108803A1 (ru)
EA (1) EA030732B1 (ru)
ES (1) ES2641572T3 (ru)
MX (1) MX2016001962A (ru)
PL (1) PL3033186T3 (ru)
UA (1) UA118966C2 (ru)
WO (1) WO2015022294A1 (ru)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014110980B4 (de) 2014-08-01 2017-10-26 Vallourec Deutschland Gmbh Verfahren zur Herstellung von warmgewalzten nahtlosen Rohren mit verdickten Enden
WO2017207660A1 (en) * 2016-05-31 2017-12-07 Vallourec Deutschland Gmbh Method for producing an elongated hollow body consisting of steel and having a polygonal, in particular square or rectangular, cross-section
JP6805639B2 (ja) * 2016-08-29 2020-12-23 日本製鉄株式会社 ステンレス鋼管の製造方法

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Publication number Priority date Publication date Assignee Title
JPS5818404B2 (ja) * 1975-01-24 1983-04-13 日本鋼管株式会社 ダイケイウスニクコウカンノヤキイレ ヤキモドシホウホウ
JPS52152814A (en) * 1976-06-14 1977-12-19 Nippon Steel Corp Thermo-mechanical treatment of seamless steel pipe
JPS57155325A (en) 1981-03-20 1982-09-25 Sumitomo Metal Ind Ltd Production of seamless steel pipe
DE3127373C2 (de) 1981-07-09 1985-08-29 Mannesmann AG, 4000 Düsseldorf Verfahren zum Herstellen von nahtlosen Stahlrohren für die Erdölindustrie
JP5119574B2 (ja) 2005-04-26 2013-01-16 Ｊｆｅスチール株式会社 Ｔｉ添加系低炭素鋼からなる継目無鋼管の熱処理方法
MX2008012240A (es) * 2006-03-28 2008-10-07 Sumitomo Metal Ind Metodo para fabricar conductos y tubos de acero sin costuras.
CN101993991B (zh) * 2010-11-20 2012-11-21 衡阳华菱钢管有限公司 一种低碳锰钢的钢管热处理方法

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Publication number Publication date
US20160376677A1 (en) 2016-12-29
DE102013108803A1 (de) 2015-02-19
UA118966C2 (uk) 2019-04-10
EA030732B1 (ru) 2018-09-28
US10100384B2 (en) 2018-10-16
EA201690242A1 (ru) 2016-06-30
WO2015022294A1 (de) 2015-02-19
ES2641572T3 (es) 2017-11-10
EP3033186A1 (de) 2016-06-22
AR097813A1 (es) 2016-04-20
PL3033186T3 (pl) 2017-12-29
BR112016000039B1 (pt) 2020-10-27
MX2016001962A (es) 2017-02-28

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