CA2509581A1 - High-strength martensitic stainless steel with excellent resistances to carbon dioxide gas corrosion and sulfide stress corrosion cracking - Google Patents

High-strength martensitic stainless steel with excellent resistances to carbon dioxide gas corrosion and sulfide stress corrosion cracking Download PDF

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CA2509581A1
CA2509581A1 CA002509581A CA2509581A CA2509581A1 CA 2509581 A1 CA2509581 A1 CA 2509581A1 CA 002509581 A CA002509581 A CA 002509581A CA 2509581 A CA2509581 A CA 2509581A CA 2509581 A1 CA2509581 A1 CA 2509581A1
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during tempering
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CA2509581C (en
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Hideki Takabe
Masakatsu Ueda
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Nippon Steel Corp
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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
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • 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
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • 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
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • 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
    • C22C38/02—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
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/004—Dispersions; Precipitations
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

The present invention provides a martensitic stainless steel in which specified elements in a steel composition are limited. The martensitic stainless steel can have high strength of 0.2% proof stress of 860 MPa or more and excellent carbon dioxide gas corrosion resistance and sulfide stress-corrosion cracking resistance by limiting the steel composition of specified elements and defining Mo content in the steel by relationships with IM values as well as by forming microstructure of the steel with main tempered martensite, carbide precipitated during tempering, and intermetallic compounds such as a Laves phase, a a phase and the like. As a result the martensitic stainless steels of the present invention can be applied to practical steels, which can be widely used in oil well tubes and the like under environment including carbon dioxide gas, hydrogen sulfide, chlorine ions or two or more of them, in wide fields.

Claims (9)

1. A high strength martensitic stainless steel excellent in carbon dioxide gas corrosion resistance and sulfide stress-corrosion cracking resistance and having 0.2 % proof stress of 860 MPa or more, characterized by including, by mass %, C:
0.005 - 0.04 %, Si: 0.5 % or less, Mn: 0.1 - 3.0 %, P: 0.04 % or less, S: 0.01 % or less, Cr: 10 - 15 %, Ni: 4.0 - 8 %, Mo: 2.8 - 5.0 %, Al: 0.001- 0.10 % and N: 0.07 %
or less, and the balance Fe and impurities, and also characterized by satisfying the expression (1) given below wherein the microstructure mainly comprises tempered martensite, carbide precipitated during tempering, and intermetallic compounds such as Laves phase, o phase and the like finely precipitated during tempering.

Mo ~ 2.3 - 0.89 Si + 32. 2 C ... (1) wherein the symbols of the respective elements in the expression (1) show the content (mass %) of each element.
2. A high strength martensitic stainless steel excellent in carbon dioxide gas corrosion resistance and sulfide stress-corrosion cracking resistance and having 0.2 % proof stress of 860 MPa or more, characterized by including, by mass %, C:
0.005 - 0.04 %, Si: 0.5 % or less, Mn: 0.1 - 3.0 %, P: 0.04 % or less, S: 0.01 % or less, Cr: 10 - 15 %, Ni: 4.0 - 8 %, Mo: 2.8 - 5.0 %, Al: 0.001- 0.10 % and N: 0.07 %
or less, and further containing one or more selected from a group consisting of Ti:
0.005 -0.25 %, V: 0.005 - 0.25 %, Nb: 0.005 - 0.25 %, and Zr: 0.005 - 0.25 %, and the balance Fe and impurities, and also characterized by satisfying the expression (1) given below wherein the microstructure mainly comprises tempered martensite, carbide precipitated during tempering, and intermetallic compounds such as Laves phase, .sigma.
phase and the like finely precipitated during tempering.

Mo ~ 2.3 - 0.89 Si + 32. 2 C ... (1) wherein the symbols of the respective elements in the expression (1) show the content (mass %) of each element.
3. A high strength martensitic stainless steel excellent in carbon dioxide gas corrosion resistance and sulfide stress-corrosion cracking resistance and having 0.2 % proof stress of 860 MPa or more, characterized by including, by mass %, C:
0.005 - 0.04 %, Si: 0.5 % or less, Mn: 0.1 - 3.0 %, P: 0.04 % or less, S: 0.01 % or less, Cr: 10 - 15 %, Ni: 4.0 - 8 %, Mo: 2.8 - 5.0 %, Al: 0.001- 0.10 %, N: 0.07 % or less, and Cu: 0.05 - 1 %, and the balance Fe and impurities, and also characterized by satisfying the expression (1) given below wherein the microstructure mainly comprises tempered martensite, carbide precipitated during tempering, and intermetallic compounds such as Laves phase, a phase and the like finely precipitated during tempering.

Mo ~ 2.3 - 0.89 Si + 32. 2 C ... (1) wherein the symbols of the respective elements in the expression (1) show the content (mass %) of each element.
4. A high strength martensitic stainless steel excellent in carbon dioxide gas corrosion resistance and sulfide stress-corrosion cracking resistance and having 0.2 % proof stress of 860 MPa or more, characterized by including, by mass %, C:
0.005 - 0.04 %, Si: 0.5 % or less, Mn: 0.1 - 3.0 %, P: 0.04 % or less, S: 0.01 % or less, Cr: 10 - 15 %, Ni: 4.0 - 8 %, Mo: 2.8 - 5.0 %, Al: 0.001- 0.10 %, N: 0.07 % or less, and Cu: 0.05 - 1 %, and further containing one or more selected from a group consisting of Ti: 0.005 - 0.25 %, V: 0.005 - 0.25 %, Nb: 0.005 - 0.25 %, and Zr: 0.005 -0.25 %, and the balance Fe and impurities, and also characterized by satisfying the expression (1) given below wherein the microstructure mainly comprises tempered martensite, carbide precipitated during tempering, and intermetallic compounds such as Laves phase, a phase and the like finely precipitated during tempering.
Mo ~ 2.3 - 0.89 Si + 32. 2 C ... (1) wherein the symbols of the respective elements in the expression (1) show the content (mass %) of each element.
5. A high strength martensitic stainless steel excellent in carbon dioxide gas corrosion resistance and sulfide stress-corrosion cracking resistance and having 0.2 % proof stress of 860 MPa or more, characterized by including, by mass %, C:
0.005 - 0.04 %, Si: 0.5 % or less, Mn: 0.1 - 3.0 %, P: 0.04 % or less, S: 0.01 % or less, Cr: 10 - 15 %, Ni: 4.0 - 8 %, Mo: 2.8 - 5.0 %, Al: 0.001- 0.10 % and N: 0.07 %
or less, and further containing one or more selected from a group consisting of Ca:
0.0002 -0.005 %, Mg: 0.0002 - 0.005 %, La: 0.0002 - 0.005 %, and Ce: 0.0002 - 0.005 %, and the balance Fe and impurities, and also characterized by satisfying the expression (1) given below wherein the microstructure mainly comprises tempered martensite, carbide precipitated during tempering, and intermetallic compounds such as Laves phase, .sigma. phase and the like finely precipitated during tempering.

Mo ~ 2.3 - 0.89 Si + 32. 2 C ... (1) wherein the symbols of the respective elements in the expression (1) show the content (mass %) of each element.
6. A high strength martensitic stainless steel excellent in carbon dioxide gas corrosion resistance and sulfide stress-corrosion cracking resistance and having 0.2 % proof stress of 860 MPa or more, characterized by including, by mass %, C:
0.005 - 0.04 %, Si: 0.5 % or less, Mn: 0.1 - 3.0 %, P: 0.04 % or less, S: 0.01 % or less, Cr: 10 - 15 %, Ni: 4.0 - 8 %, Mo: 2.8 - 5.0 %, Al: 0.001- 0.10 % and N: 0.07 %
or less, and further containing one or more selected from a group consisting of Ti:
0.005 -0.25 %, V: 0.005 - 0.25 %, Nb: 0.005 - 0.25 %, and Zr: 0.005 - 0.25 %, and one or more selected from a group consisting of Ca: 0.0002 - 0.005 %, Mg: 0.0002 - 0.005 %, La:
0.0002 - 0.005 %, and Ce: 0.0002 - 0.005 %, and the balance Fe and impurities, and also characterized by satisfying the expression (1) given below wherein the microstructure mainly comprises tempered martensite, carbide precipitated during tempering, and intermetallic compounds such as Laves phase, .sigma. phase and the like finely precipitated during tempering.

Mo ~ 2.3 - 0.89 Si + 32. 2 C ... (1) wherein the symbols of the respective elements in the expression (1) show the content (mass %) of each element.
7. A high strength martensitic stainless steel excellent in carbon dioxide gas corrosion resistance and sulfide stress-corrosion cracking resistance and having 0.2 % proof stress of 860 MPa or more, characterized by including, by mass %, C:
0.005 - 0.04 %, Si: 0.5 % or less, Mn: 0.1 - 3.0 %, P: 0.04 % or less, S: 0.01 % or less, Cr: 10 - 15 %, Ni: 4.0 - 8 %, Mo: 2.8 - 5.0 %, Al: 0.001- 0.10 %, N: 0.07 % or less, and Cu: 0.05 - 1 %, and further containing one or more selected from a group consisting of Ca: 0.0002 - 0.005 %, Mg: 0.0002 - 0.005 %, La: 0.0002 - 0.005 %, and Ce:
0.0002 -0.005 %, and the balance Fe and impurities, and also characterized by satisfying the expression (1) given below wherein the microstructure mainly comprises tempered martensite, carbide precipitated during tempering, and intermetallic compounds such as Laves phase, .sigma. phase and the like finely precipitated during tempering.
Mo ~ 2.3 - 0.89 Si + 32. 2 C ... (1) wherein the symbols of the respective elements in the expression (1) show the content (mass %) of each element.
8. A high strength martensitic stainless steel excellent in carbon dioxide gas corrosion resistance and sulfide stress-corrosion cracking resistance and having 0.2 % proof stress of 860 MPa or more, characterized by including, by mass %, C:
0.005 - 0.04 %, Si: 0.5 % or less, Mn: 0.1 - 3.0 %, P: 0.04 % or less, S: 0.01 % or less, Cr: 10 - 15 %, Ni: 4.0 - 8 %, Mo: 2.8 - 5.0 %, Al: 0.001- 0.10 %, N: 0.07 % or less, and Cu: 0.05 - 1 %, and further containing one or more selected from a group consisting of Ti: 0.005 - 0.25 %, V: 0.005 - 0.25 %, Nb: 0.005 - 0.25 %, and Zr: 0.005 -0.25 %, and one or more selected from a group consisting of Ca: 0.0002 - 0.005 %, Mg:
0.0002 - 0.005 %, La: 0.0002 - 0.005 %, and Ce: 0.0002 - 0.005 %, and the balance Fe and impurities, and also characterized by satisfying the expression (1) given below wherein the microstructure mainly comprises tempered martensite, carbide precipitated during tempering, and intermetallic compounds such as Laves phase, .sigma.
phase and the like finely precipitated during tempering.
Mo ~ 2.3 - 0.89 Si + 32. 2 C ... (1) wherein the symbols of the respective elements in the expression (1) show the content (mass %) of each element.
9. A high strength martensitic stainless steel excellent in carbon dioxide gas corrosion resistance and sulfide stress-corrosion cracking resistance and having 0.2 % proof stress of 860 MPa or more, characterized by including compositions defined in any one of Claims 1 to 8 and characterized in that steel, which satisfies the expression (1) given below, is subjected to tempering in which (20 + log t)(T +
273) satisfies 13500 - 17700 when, after quenching the steel at a quenching temperature of 880 °C - 1000 °C, a range of a tempering temperature is set to 450 °C
- 620 °C, a tempering temperature is set to T (°C) and tempering time is set to t (hour), whereby the microstructure of said steel mainly comprises tempered martensite, carbide precipitated during tempering, and intermetallic compounds such as Laves phase, .sigma. phase and the like finely precipitated during tempering.

Mo ~ 2.3 - 0.89 Si + 32. 2 C ... (1) wherein the symbols of the respective elements in the expression (1) show the content (mass %) of each element.
CA2509581A 2002-12-20 2003-12-18 High-strength martensitic stainless steel with excellent resistances to carbon dioxide gas corrosion and sulfide stress corrosion cracking Expired - Fee Related CA2509581C (en)

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JP2002369595 2002-12-20
JP2002-369595 2002-12-20
PCT/JP2003/016288 WO2004057050A1 (en) 2002-12-20 2003-12-18 High-strength martensitic stainless steel with excellent resistances to carbon dioxide gas corrosion and sulfide stress corrosion cracking

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US (1) US20050224143A1 (en)
EP (1) EP1584699A4 (en)
JP (1) JP4428237B2 (en)
CN (1) CN100368579C (en)
AR (1) AR042494A1 (en)
AU (1) AU2003289437B2 (en)
BR (1) BRPI0317550B1 (en)
CA (1) CA2509581C (en)
MX (1) MXPA05006562A (en)
NO (1) NO337858B1 (en)
RU (1) RU2307876C2 (en)
WO (1) WO2004057050A1 (en)

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