CA2602526A1 - A method of manufacturing a heavy wall seamless steel pipe for line pipe - Google Patents

A method of manufacturing a heavy wall seamless steel pipe for line pipe Download PDF

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Publication number
CA2602526A1
CA2602526A1 CA002602526A CA2602526A CA2602526A1 CA 2602526 A1 CA2602526 A1 CA 2602526A1 CA 002602526 A CA002602526 A CA 002602526A CA 2602526 A CA2602526 A CA 2602526A CA 2602526 A1 CA2602526 A1 CA 2602526A1
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CA
Canada
Prior art keywords
pipe
temperature
cooling
heating
seamless
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Granted
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CA002602526A
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French (fr)
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CA2602526C (en
Inventor
Kunio Kondo
Yuji Arai
Nobuyuki Hisamune
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Nippon Steel Corp
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Individual
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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
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • 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
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)
  • Metal Extraction Processes (AREA)

Abstract

A heavy wall seamless steel pipe for line pipe with a high strength and increased toughness, which has a chemical composition, by mass%, that consists of C: 0.03 to 0.08%, Si: not more than 0.25%, Mn:0.3 to 2.5%, Al: 0.001 to 0.10%, Cr: 0.02 to 1.0%, Ni: 0.02 to 1.0%, Mo: 0.02 to 1.2%, Ti:0.004 to 0.010%, N:0.002 to 0.008%, and 0.0002 to 0.005%, in total, of at least one selected from Ca, Mg and REM, and the balance Fe and impurities, optionally including V: 0 to 0.08%, Nb: 0 to 0.05%
or Cu: 0 to 1.0%,and that P and S among impurities are not more than 0.05% and not more than 0.005% respectively. It may contain 0.0003 to 0.01% of boron.

A manufacturing method thereof is characterized by cooling rate, heating condition for piercing, and heat treating after pipe making.

Claims (6)

1. A heavy wall seamless steel pipe for line pipe with a high strength and increased toughness, which has a chemical composition, by mass%, that consists of C: 0.03 to 0.08%, Si: not more than 0.25%, Mn:0.3 to 2.5%, Al: 0.001 to 0.10%, Cr: 0.02 to 1.0%, Ni: 0.02 to 1.0%, Mo: 0.02 to 1.2%, Ti:0.004 to 0.010%, N:0.002 to 0.008%, and 0.0002 to 0.005%, in total, of at least one selected from Ca, Mg and REM, and the balance Fe and impurities, optionally including V. 0 to 0.08%, Nb: 0 to 0.05%
or Cu: 0 to 1.0%,and that P and S among impurities are not more than 0.05% and not more than 0.005% respectively.
2. A heavy wall seamless steel pipe for line pipe with a high strength and increased toughness, which has a chemical composition, by mass%, that consists of C: 0.03 to 0.08%, Si: not more than 0.25%, Mn:0.3 to 2.5%, Al: 0.001 to 0.10%, Cr: 0.02 to 1.0%, Ni: 0.02 to 1.0%, Mo: 0.02 to 1.2%, 'fi:0.004 to 0.010%, N:0.002 to 0.008%,B:
0.0003 to 0.01%, and 0.0002 to 0.005%, in total, of at least one selected from Ca, Mg and REM, and the balance Fe and impurities, optionally including V. 0 to 0.08%, Nb:
0 to 0.05% or Cu: 0 to 1.0%,and that P and S among impurities are not more than 0.05% and not more than 0.005% respectively.
3. A method of manufacturing a heavy wall seamless steel pipe for line pipe with a high strength and increased toughness characterized by comprising the following steps (a) to (e):

(a) ~Forming a billet with a round cross section by continuous casting of molten steel that has the chemical composition according to Claim 1 or 2.

(b) ~Cooling the billet to the room temperature at not less than 6°C/min of an average cooling rate between 1400 and 1000°C.

(c) ~Heating the billet to the temperature between 1150 and 1280°C at not more than 15°C/min of an average heating rate between 550 and 900°C, then piercing and rolling, to make a seamless pipe.

(d) ~Cooling forcedly the seamless pipe to a temperature of not higher than 100°C at not less than 8°C/min of an average cooling rate between 800 and 500°C, immediately after pipe making, or after isothermal treating at the temperature between 850 and 1000°C immediately in succession with pipe making, or after heating to the temperature between 850 and 1000°C after once cooling in succession with pipe making.

(e) ~Tempering the seamless pipe at the temperature between 500 and 690°C.
4. A method of manufacturing a heavy wall seamless steel pipe for line pipe with a high strength and increased toughness characterized by comprising the following steps (a) to (f):

(a) ~Forming a bloom or slab with a square cross section by continuous casting of molten steel that has the chemical composition according to Claim 1 or 2.

(b) ~Cooling the bloom or slab to the room temperature at not less than 8°C/min of an average cooling rate between 1400 and 1000°C.

(c) ~Heating the bloom or slab to the temperature between 1150 and 1280°C at not more than 15°C/min of an average heating rate between 550 and 900°C, and then cooling to the room temperature, to form a billet with a round cross section by forging and/or rolling.

(d) ~Heating the billet to the temperature between 1150 and 1280°C, then piercing and rolling, to make a seamless pipe.

(e) ~Cooling forcedly the seamless pipe to a temperature of not higher than 100°C at not less than 8°C/min of an average cooling rate between 800 and 500°C, immediately after pipe making, or after isothermal treating at the temperature between 850 and 1000°C immediately in succession with pipe making, or after heating to the temperature between 850 and 1000°C after once cooling in succession with pipe making.

(f) ~Tempering the seamless pipe at the temperature between 500 and 690°C.
5. A method of manufacturing a heavy wall seamless steel pipe for line pipe with a high strength and increased toughness characterized by comprising the following steps (a) to (e):

(a) ~Forming a billet with a round cross section by continuous casting of a molten steel that has the chemical composition according to Claim 1 or 2.

(b) ~Cooling the billet to the room temperature at not less than
6°C/min of an average cooling rate between 1400 and 1000°C.

(c) ~Isothermal treating the billet during not less than 15 minutes at the temperature between 550 and 1000°C, and heating to the temperature between 1150 and 1280°C, then piercing and rolling, to make a seamless pipe.

(d) ~Cooling forcedly the seamless pipe to a temperature of not higher than 100°C at not less than 8°C/min of an average heating rate between 800 and 500°C, immediately after pipe making, or after isothermal treating at the temperature between 850 and 1000°C immediately in succession with pipe making, or after heating to the temperature between 850 and 1000°C after once cooling in succession with pipe making.

(e) ~Tempering the seamless pipe at the temperature between 500 and 690°C.

6. A method of manufacturing a heavy wall seamless steel pipe for line pipe with a high strength and increased toughness characterized by comprising the following steps (a) to (f):

(a) ~Forming a bloom or slab with a square cross section by continuous casting of a molten steel that has the chemical composition according to Claim 1 or 2.

(b) ~Cooling the bloom or slab to the room temperature at not less than 8°C/min of an average cooling rate between 1400 and 1000°C.

(c) ~Isothermal treating the bloom or slab during not less than 15 minutes at the temperature between 550 and 1000°C, and heating to the temperature between 1150 and 1280°C, then forging and/or rolling, to form a billet with a round cross section, and then cooling to the room temperature.

(d) ~Heating the billet to the temperature of 1150 to 1280°C, then piercing and rolling, to make a seamless pipe.

(e) ~Cooling forcedly the seamless pipe to a temperature of not higher than 100°C at not less than 8°C/min of an average cooling rate between 800 and 500°C, immediately after pipe making, or after isothermal treating at the temperature between 850 and 1000°C immediately in succession with pipe making, or after heating to the temperature between 850 and 1000°C after once cooling in succession with pipe making.

(f) ~Tempering the seamless pipe at the temperature between 500 and 690°C.
CA2602526A 2005-03-29 2006-03-09 A method of manufacturing a heavy wall seamless steel pipe for line pipe Expired - Fee Related CA2602526C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2005-095240 2005-03-29
JP2005095240A JP4792778B2 (en) 2005-03-29 2005-03-29 Manufacturing method of thick-walled seamless steel pipe for line pipe
PCT/JP2006/304613 WO2006103894A1 (en) 2005-03-29 2006-03-09 Thick seamless steel pipe for line pipe and method for production thereof

Publications (2)

Publication Number Publication Date
CA2602526A1 true CA2602526A1 (en) 2006-10-05
CA2602526C CA2602526C (en) 2011-08-16

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CA2602526A Expired - Fee Related CA2602526C (en) 2005-03-29 2006-03-09 A method of manufacturing a heavy wall seamless steel pipe for line pipe

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US (2) US20080047635A1 (en)
EP (1) EP1876254B1 (en)
JP (1) JP4792778B2 (en)
CN (1) CN100543167C (en)
AR (1) AR052706A1 (en)
AU (1) AU2006229079C1 (en)
BR (1) BRPI0608953B8 (en)
CA (1) CA2602526C (en)
NO (1) NO340772B1 (en)
WO (1) WO2006103894A1 (en)

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