WO2014054287A1 - 厚肉鋼管の製造方法 - Google Patents
厚肉鋼管の製造方法 Download PDFInfo
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- WO2014054287A1 WO2014054287A1 PCT/JP2013/005900 JP2013005900W WO2014054287A1 WO 2014054287 A1 WO2014054287 A1 WO 2014054287A1 JP 2013005900 W JP2013005900 W JP 2013005900W WO 2014054287 A1 WO2014054287 A1 WO 2014054287A1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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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
- 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
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- 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
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/001—Heat treatment of ferrous alloys containing Ni
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- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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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
- 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
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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
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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
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
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- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Definitions
- the target strength mentioned here means a yield point, specifically, a 0.2% proof stress, a 0.7% proof strength, or a yield strength.
- the inner / outer surface immersion axial quenching method which is performed, is advantageous in that it has a large cooling capacity and a simple structure of the apparatus (see Patent Document 1 [0002]).
- Patent Document 1 [0002] In order to minimize the difference in cooling history in the circumferential direction of pipe, the steel pipe is immersed in water in the water tank while rotating, and the water injected from the nozzle in the water (nozzle)
- a rotary quenching equipment for steel pipe that sprays and quenches the inner and outer surfaces of the steel pipe is installed in the final heat treatment line of the carbon steel pipe (Patent Documents 2 [0002] to [0003]. reference).
- the steel pipe having the composition A disclosed in Patent Document 3 is the thick steel pipe, it is stably adjusted to the target strength (surface hardness / center) in one QT. It is difficult to adjust the hardness ratio to 1.00 to 1.05. Therefore, in such a case, conventionally, one or both of repeating Q (quenching) a plurality of times or increasing the amount of alloy that contributes to improving the hardenability in the composition A is included. Measures were adopted. However, the former measure has the disadvantage of increasing heat treatment costs, and the latter measure is limited because the weldability and corrosion resistance (particularly corrosion resistance in hydrogen sulfide environment (hydrogen sulfide corrosion resistance)) are impaired. In addition, there is a disadvantage that the alloy cost is increased. Therefore, in the background art, the thick steel pipe is stably adjusted to the target strength by one QT (surface hardness / center hardness ratio: adjusted to 1.00 to 1.05). There was a problem that it was difficult.
- the present inventors diligently studied to solve the above-mentioned problems, and as a result, immersed in water while rotating around the tube axis while supporting a high-temperature steel pipe, water flows on the inner and outer surfaces of the steel pipe while continuing the rotation.
- the cooling step of imparting a cooling property by adopting a specific cooling condition, the cooling capacity is improved so that even the thick steel pipe having the composition A is sufficiently hardened to the center of the thickness.
- the target strength can be stably adjusted (adjusted to the ratio of surface hardness / center hardness: 1.00 to 1.05) by one QT, and the present invention has been made.
- the present invention supports a steel pipe having a thickness of 1/2 inch or more heated in the ⁇ range (austenite region) and is immersed in water while rotating around the tube axis and rotating in the water.
- the axial flow that is the water flow in the direction of the pipe axis on the inner surface (inside surface of a pipe)
- the collision flow that is the water flow that collides with the outer surface of the tube (outer surface of a pipe)
- the rotation has a pipe peripheral speed (circumferential velocity of pipe) of 4 m / s or more
- the application of the axial flow and the collision flow is as follows: Starting within 1.1 s after immersion of the entire steel pipe and continuing until the steel pipe reaches 150 ° C.
- the pipe flow velocity (pipe flow velocity) is 7 m / s or more
- the discharge flow velocity of the collision flow Production of thick-walled steel pipes characterized by a discharge velocity of 9 m / s or more. It is a method.
- the cooling capacity during quenching is improved to the range of 7500 to 8000 kcal / m 2 ⁇ h ⁇ ° C. in terms of the heat-transfer coefficient at the inner and outer surfaces of the steel pipe, Even the thick steel pipe of A can be fully fired to the center of the thickness, and can be stably adjusted to the target strength by one QT.
- FIG. 1 is a schematic diagram showing an example of a cooling process according to the present invention.
- a steel pipe 1 having a thickness of 1/2 inch or more (preferably 2 inches or less) heated to the ⁇ region for quenching is supported and rotated 2 around the pipe axis.
- the axial flow 5 which is the water flow in the axial direction of the tube, is directed to the tube inner surface side, toward the tube outer surface side.
- a collision flow 6 which is a water flow that collides with the outer surface of the tube.
- the support and rotation means (support and rotary means) of the steel pipe 1 are a plurality of pipes having a rotation axis parallel to the pipe axis on the pipe outer periphery at a plurality of places (at least two places) in the pipe axis direction of the steel pipe 1.
- the steel pipe 1 is supported by abutting (at least two places) on the rollers 10, and the steel pipe 1 is rotated 2 by driving and rotating any one (at least one place) of the plurality of rollers 10.
- the plurality of rollers 10 can be moved in and out of the water 3 by being supported and lifted by support lifting means (not shown).
- the water temperature of the water 3 is preferably 50 ° C. or less.
- the axial flow 5 is given by water injection (water injection) from a nozzle 11 disposed on one end surface side of the steel pipe 1 in the tube axis direction.
- the collision flow 6 is applied by water injection from a plurality of nozzles 12 arranged in the pipe axis direction on both sides of the steel pipe 1 in the pipe radial direction.
- the nozzles 11 and 12 are supported and lifted by the support lifting / lowering means (not shown) and can enter and exit the water 3.
- VLC 7 m / s or more
- the pipe peripheral speed VR of the rotation 2 is less than the VCR (4 m / s)
- a plastic strain plastic due to a difference in cooling history at a position in the pipe peripheral direction and a difference in transformation behavior associated therewith. Since strain) increases and the steel pipe deforms, VR ⁇ VRC (4 m / s).
- the pipe peripheral speed VR is 5 m / s or more.
- the upper limit value of VR is 8 m / s or less because of the steel pipe popping out due to eccentricity.
- t1C 1.1 s
- bubbles generated on the inner surface side of the tube are more stable. It evolves into a film (water vapor film) and adheres to the inner surface of the tube, and the attached water vapor film is difficult to be detached from the inner surface of the tube even by the application of the axial flow 7, and the cooling capacity does not improve, so t1 ⁇ t1C (1 .1s).
- t1 is 0.9 s or less.
- T1C 150 ° C.
- T1 is a value measured when the axial flow 5 and the collision flow 6 are stopped and held in water for about 10 seconds, extracted into the atmosphere, and further held for about 10 seconds.
- T1 is 100 ° C. or lower.
- the lower limit of T1 is 50 ° C. because the cooling time is required and the productivity is lowered as the temperature is lowered.
- VL of the axial flow 5 is less than the VLC (7 m / s), it is difficult to remove bubbles generated on the inner surface of the tube, and the cooling ability of the inner surface of the tube is not improved. Therefore, VL ⁇ VLC (7 m / s) ).
- the pipe flow velocity VL is 10 m / s or more.
- the upper limit of VL is 20 m / s from the reason of equipment cost.
- the discharge flow velocity VT of the collision flow 6 is less than the VTC (9 m / s), it is difficult to remove bubbles generated on the outer surface of the tube, and the cooling capacity of the outer surface of the tube is not improved. Therefore, VT ⁇ VTC (9 m / s) ).
- the discharge flow velocity VT of the collision flow 6 is 12 m / s or more.
- the upper limit of VT is 30 m / s for reasons of equipment costs.
- the steel composition of the steel pipe to which the present invention is applied has a thin target (thickness less than 1/2 inch), and a predetermined target strength can be obtained stably even if the cooling conditions specified in the present invention are not met.
- the predetermined target strength is stabilized by the method of the present invention.
- the said composition A is mentioned, for example.
- a seamless steel pipe having the chemical composition (unit: mass%, balance is Fe and inevitable impurities) and size (wall thickness t x outer diameter D x length L) shown in Table 1 is tempered only once (QT). Processed.
- the cooling process of the Q treatment was the cooling process of the form illustrated in FIG.
- the T treatment (tempering treatment) was performed under normal tempering conditions (conditions of heating to the normal tempering temperature inside the furnace and then allowing to cool outside the furnace).
- Table 2 shows the processing conditions of the QT process.
- the steel pipe after the T treatment was examined for the yield point (target strength: abbreviation TS) and the hardness of the surface part and the central part in the thickness direction.
- the difference in hardness between the surface layer portion and the center portion is reduced (the surface / center hardness ratio is within 1.00 to 1.05), and a homogeneous material can be obtained.
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Abstract
Description
1) 管端(pipe end)を含む多点拘束(multiple constraint)に鋼管の回転を付加した浸漬式内外面焼入法(both side dip quenching of steel pipes)は、焼入歪(quench distortion)の防止に著効があり、しかも、冷却能力(cooling capacity)も向上するので、継目無鋼管(seamless steel pipe)や電縫鋼管(electric resistance welded steel pipe)、特に、厚肉鋼管の熱処理(Q-T)に適している(非特許文献1参照)。
2) 加熱された鋼管を水槽に投入して浸漬し、鋼管の内外両面にその軸線方向(direction of axis)に沿う冷却水流(cooling water flow)(軸流(axial stream))を与えて焼入れを行う方式である内外面浸漬軸流焼入方式は、冷却能力が大きく、装置(equipment)の構造が単純であると云う点で有利である(特許文献1[0002]参照)。
3) 管周方向(circumferential direction of pipe)の冷却履歴(cooling history)の差を最小にする為に鋼管を回転させながら水槽の水に浸漬し、水中のノズル(nozzle)から噴射させた水を鋼管の内外面に吹き付け、急冷する鋼管の回転焼入れ装置(rotary quenching equipment)が、炭素鋼管の最終熱処理ライン(final heat treatment line)内に設置されている(特許文献2[0002]~[0003]参照)。
前記冷却工程において、前記回転2は管周速VRを該VRの臨界値(critical value)VCR=4m/s以上とし、前記軸流5および、衝突流6の付与は、前記鋼管1全体の浸漬4後の時間の臨界値t1C=1.1s以内に開始して前記鋼管1が温度の臨界値T1C=150℃以下となるまで継続させ、前記軸流5の管内流速VLを該VLの臨界値VLC=7m/s以上、前記衝突流6の吐出流速VTを該VTの臨界値VTC=9m/s以上とする。
好ましくは、管周速VRは5m/s以上である。なお、VRの上限値は、偏心による鋼管の飛び出しの理由から、8m/s以下である。
前記鋼管1全体の浸漬4から前記軸流5および、衝突流6の付与開始までの時間t1が前記t1C(1.1s)超であると、特に管内面側に生じた気泡がより安定な水蒸気膜(water vapor film)へと進化して管内面に付着し、該付着した水蒸気膜は前記軸流7の付与によっても管内面から離脱させ難く、冷却能力が向上しないため、t1≦t1C(1.1s)とする。好ましくは、t1は0.9s以下である。
前記軸流5の管内流速VLが前記VLC(7m/s)未満であると、管内面側に生じた気泡を除去し難く、管内面の冷却能が向上しないため、VL≧VLC(7m/s)とする。
好ましくは、管内流速VLは10m/s以上である。なお、VLの上限値は、設備コストの理由から、20m/sである。
好ましくは、衝突流6の吐出流速VTは12m/s以上である。なお、VTの上限値は、設備コストの理由から、30m/sである。
本発明を適用する鋼管の鋼組成は、薄肉(肉厚1/2インチ未満)では本発明に規定された冷却条件を外れても所定の目標強度が安定して得られるが、厚肉(肉厚1/2インチ以上、好ましくは2インチ以下)では、従来の冷却方法では、所定の目標強度が安定して得られない鋼組成であっても、本発明方法により、所定の目標強度が安定して得られるれる。このような鋼組成としては、例えば前記組成Aが挙げられる。
前記調査の結果を表2に示す。表2より、本発明例では比較例に比べて、肉厚中心でのTSが前記目標強度95~140ksi(=655~965MPa)に達したことが分る。加えて表層部と中心部の硬さの差が小さくなり(表面/中心硬さ比:1.00~1.05に収まり)均質な材質が得られることが認められる。
2 回転
3 水(冷媒)
4 浸漬
5 軸流
6 衝突流
10 ローラ
11,12 ノズル
Claims (1)
- γ域に加熱した肉厚1/2インチ以上の鋼管を支持して管軸周りに回転させつつ水中に浸漬し、前記水中で回転中の鋼管に対し、管内面側へは管軸方向の水流である軸流、管外面側へは管外面に衝突する水流である衝突流を付与する冷却工程を有する厚肉鋼管の製造方法であって、前記回転は管周速を4m/s以上とし、前記軸流および、衝突流の付与は、前記鋼管全体の浸漬後1.1s以内に開始して前記鋼管が150℃以下となるまで継続させ、前記軸流の管内流速を7m/s以上、前記衝流の吐出流速を9m/s以上とすることを特徴とする厚肉鋼管の製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112015007331A BR112015007331A2 (pt) | 2012-10-04 | 2013-10-03 | método para fabricar tubo de aço de parede espessa |
EP13844288.4A EP2905347B1 (en) | 2012-10-04 | 2013-10-03 | Method for manufacturing heavy wall steel pipe |
US14/433,727 US9506132B2 (en) | 2012-10-04 | 2013-10-03 | Method for manufacturing heavy wall steel pipe |
JP2014539616A JP5896036B2 (ja) | 2012-10-04 | 2013-10-03 | 厚肉鋼管の製造方法 |
MX2015003780A MX2015003780A (es) | 2012-10-04 | 2013-10-03 | Metodo para la fabricacion de un tubo de acero de pared gruesa. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012221875 | 2012-10-04 | ||
JP2012-221875 | 2012-10-04 |
Publications (1)
Publication Number | Publication Date |
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WO2014054287A1 true WO2014054287A1 (ja) | 2014-04-10 |
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US (1) | US9506132B2 (ja) |
EP (1) | EP2905347B1 (ja) |
JP (1) | JP5896036B2 (ja) |
AR (1) | AR092900A1 (ja) |
BR (1) | BR112015007331A2 (ja) |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2016152668A1 (ja) * | 2015-03-24 | 2016-09-29 | 日本発條株式会社 | 中空スタビライザ |
WO2016152671A1 (ja) * | 2015-03-24 | 2016-09-29 | 日本発條株式会社 | 中空スタビライザの製造方法 |
CN112111641A (zh) * | 2020-09-29 | 2020-12-22 | 邯郸新兴特种管材有限公司 | 一种厚壁L80-13Cr无缝钢管的热处理方法 |
Families Citing this family (1)
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CN112378166B (zh) * | 2020-11-16 | 2021-12-28 | 灵璧久工精密钢管制造有限公司 | 一种无缝钢管加工用冷却装置及其使用方法 |
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- 2013-10-03 MX MX2015003780A patent/MX2015003780A/es active IP Right Grant
- 2013-10-03 WO PCT/JP2013/005900 patent/WO2014054287A1/ja active Application Filing
- 2013-10-03 BR BR112015007331A patent/BR112015007331A2/pt not_active Application Discontinuation
- 2013-10-03 JP JP2014539616A patent/JP5896036B2/ja active Active
- 2013-10-03 US US14/433,727 patent/US9506132B2/en active Active
- 2013-10-03 EP EP13844288.4A patent/EP2905347B1/en active Active
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Cited By (8)
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WO2016152668A1 (ja) * | 2015-03-24 | 2016-09-29 | 日本発條株式会社 | 中空スタビライザ |
WO2016152671A1 (ja) * | 2015-03-24 | 2016-09-29 | 日本発條株式会社 | 中空スタビライザの製造方法 |
JP2016179764A (ja) * | 2015-03-24 | 2016-10-13 | 日本発條株式会社 | 中空スタビライザの製造方法 |
JP2016179765A (ja) * | 2015-03-24 | 2016-10-13 | 日本発條株式会社 | 中空スタビライザ |
EP3281814A4 (en) * | 2015-03-24 | 2018-11-21 | NHK Spring Co., Ltd. | Method for producing hollow stabilizer |
US10415110B2 (en) | 2015-03-24 | 2019-09-17 | Nhk Spring Co., Ltd. | Method for producing hollow stabilizer |
US10442269B2 (en) | 2015-03-24 | 2019-10-15 | Nhk Spring Co., Ltd. | Hollow stabilizer |
CN112111641A (zh) * | 2020-09-29 | 2020-12-22 | 邯郸新兴特种管材有限公司 | 一种厚壁L80-13Cr无缝钢管的热处理方法 |
Also Published As
Publication number | Publication date |
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JPWO2014054287A1 (ja) | 2016-08-25 |
EP2905347A1 (en) | 2015-08-12 |
EP2905347A4 (en) | 2016-03-16 |
BR112015007331A2 (pt) | 2017-07-04 |
US9506132B2 (en) | 2016-11-29 |
JP5896036B2 (ja) | 2016-03-30 |
MX2015003780A (es) | 2015-07-14 |
US20150247227A1 (en) | 2015-09-03 |
AR092900A1 (es) | 2015-05-06 |
EP2905347B1 (en) | 2019-03-06 |
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