KR950000910A - High-performance stainless steels with minimum molybdenum content and high tungsten content - Google Patents

High-performance stainless steels with minimum molybdenum content and high tungsten content Download PDF

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KR950000910A
KR950000910A KR1019940003757A KR19940003757A KR950000910A KR 950000910 A KR950000910 A KR 950000910A KR 1019940003757 A KR1019940003757 A KR 1019940003757A KR 19940003757 A KR19940003757 A KR 19940003757A KR 950000910 A KR950000910 A KR 950000910A
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South Korea
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max
alloy
content
stainless steel
present
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KR1019940003757A
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Korean (ko)
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KR970001326B1 (en
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김영길
권혁상
오방원
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천성순
한국과학기술원
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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
    • C22C38/44—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
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/18—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
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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

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

Abstract

본 발명은 종래의 이상 스테인레스강 합금에 첨가되고 있는 Mo를 W으로 치환하고 Mo의 함량을 최소화 함으로써 내식성의 저하없이 시그마상의 생성에 의한 취성의 발생이 현저히 지연되는 이상 스테인레스강 합금에 관한 것으로서, 그 조성은 중량 분율로 Cr 20~27%, Ni 4~7%, N 0.1~0.35%, W 1~4%, Mo 최대 1.0%, Si 최대 0.8%, Mn 최대 2.0%, Cu 최대 2.0%, Ce 최대 0.18%, B 최대 0.007%, C 최대 0.05%, S 최대 0.03%, P 최대 0.04% 및 잔량의 Fe와 잔여 불순물로 이루어진다.The present invention relates to an ideal stainless steel alloy in which the brittleness caused by the generation of sigma phase is remarkably delayed by replacing the Mo added to the conventional ideal stainless steel alloy with W and minimizing the content of Mo. Composition is by weight fraction Cr 20-27%, Ni 4-7%, N 0.1-0.35%, W 1-4%, Mo max 1.0%, Si max 0.8%, Mn max 2.0%, Cu max 2.0%, Ce Up to 0.18%, up to 0.007% of B, up to 0.05% of C, up to 0.03% of S, up to 0.04% of P, and residual amounts of Fe and residual impurities.

본 발명의 합금은 염화물 분위기하에서의 핏팅 및 응력 부식 저항성이 우수하면서도 시그마상 석출이 억제되어, 기존의 이상 스테인레스강으로는 제조가 곤란하였던 대형 주조 제품 및 대형 파이프의 제조가 가능하며 여간 성형, 용접 등에도 장점을 가지고 있다. 본 발명의 합금은 발전소, 석유 및 가스 산업의 생산 및 공정 설비, 화학공정 설비, 종이 산업 등 고내식성과 고강도가 요구되는 부위에 사용될 수 있다.The alloy of the present invention is excellent in the fitting and stress corrosion resistance in the chloride atmosphere, while suppressing sigma phase precipitation, it is possible to manufacture large cast products and large pipes, which were difficult to manufacture with conventional abnormal stainless steel, can be formed between the molding, welding, etc. Also has advantages. The alloy of the present invention can be used in areas where high corrosion resistance and high strength are required, such as power plants, production and processing facilities in the oil and gas industry, chemical process equipment, and paper industry.

Description

몰리브덴 최소 저함량 및 텅스텐 고함량의 고기능 이상 스테인레스강High-performance stainless steels with minimum molybdenum content and high tungsten content

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 이상 스테인레스강 합금에 있어서, 텅스텐 및 몰리브덴의 함량에 따른 핏팅 부식 저항성의 변화를 80℃의 3.5% NaCl 용액 중에서의 핏팅 전위의 변화로서 나타낸 도면, 제2도는 이상 스테인레스강 합금에 있어서 텅스텐 및 몰리브덴의 함량에 따른 취성 발생 특성의 변화를 80℃ 등온 열처리에 따른 상온 충격 에너지의 변화로서 나타낸 도면, 제3도는 본 발명의 합금 8 및 11과 비교 합금 2(ALLOY 2205)을 1050℃에서 수냉한 경우와 노냉한 경우의 상온 충격 에너지를 나타낸 도면.1 is a diagram showing the change in the fitting corrosion resistance according to the content of tungsten and molybdenum in the ideal stainless steel alloy as a change in the fitting potential in a 3.5% NaCl solution at 80 ° C. FIG. 2 is a tungsten in the ideal stainless steel alloy. And the change in brittleness characteristics according to the content of molybdenum as a change in the impact energy at room temperature according to the isothermal heat treatment at 80 ℃, Figure 3 is water cooling of alloy 8 and 11 and Comparative Alloy 2 (ALLOY 2205) of the present invention at 1050 ℃ A diagram showing the room temperature impact energy in one case and in the cold case.

Claims (3)

중량 분율로 Cr 20~27%, Ni 4~7%, N 0.1~0.35%, W 1~4%, Mo 최대 1.0%, Si 최대 0.8%, Mn 최대 2.0%, Cu 최대 2.0%, Ce 최대 0.18%, B 최대 0.007%, C 최대 0.05%, S 최대 0.03%, P 최대 0.04% 및 잔량의 Fe와 잔여 불순물로 이루어지는 것을 특징으로 하는 이상 스테인레스강 합금.By weight fraction Cr 20-27%, Ni 4-7%, N 0.1-0.35%, W 1-4%, Mo max 1.0%, Si max 0.8%, Mn max 2.0%, Cu max 2.0%, Ce max 0.18 An ideal stainless steel alloy, characterized by consisting of%, B max 0.007%, C max 0.05%, S max 0.03%, P max 0.04%, and residual amounts of Fe and residual impurities. 제1항에 있어서, 중량 분율로 Cr 20~27%, Ni 4~7%, N 0.1~0.35%, W 1~4%, Mo 0.5~1.0%, Si 최대 0.8%, Mn 최대 2.0%, Cu 최대 2.0%, Ce 최대 0.18%, B 최대 0.007%, C 최대 0.05%, S 최대 0.03%, P 최대 0.04% 및 잔량의 Fe와 잔여 불순물로 이루어지는 것을 특징으로 하는 합금.According to claim 1, by weight fraction Cr 20-27%, Ni 4-7%, N 0.1-0.35%, W 1-4%, Mo 0.5-1.0%, Si max 0.8%, Mn max 2.0%, Cu Alloy up to 2.0%, Ce up 0.18%, B up 0.007%, C up 0.05%, S up 0.03%, P up 0.04% and residual Fe and residual impurities. 제1항에 있어서, 중량 분율로 Cr 20~27%, Ni 4~7%, N 0.1~0.35%, W 2~4%, Si 최대 0.8%, Mn 최대 2.0%, Cu 최대 2.0%, Ce 최대 0.18%, B 최대 0.007%, C 최대 0.05%, S 최대 0.03%, P 최대 0.04% 및 잔량의 Fe와 잔여 불순물로 이루어지는 것을 특징으로 하는 합금.The method of claim 1, wherein by weight fraction Cr 20-27%, Ni 4-7%, N 0.1-0.35%, W 2-4%, Si max 0.8%, Mn max 2.0%, Cu max 2.0%, Ce max An alloy characterized by consisting of 0.18%, B max 0.007%, C max 0.05%, S max 0.03%, P max 0.04%, and the balance of Fe and residual impurities. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940003757A 1993-06-24 1994-02-28 High functional duplex stainless steel having a minimized content of molybdenum and a high content of tungsten KR970001326B1 (en)

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KR1019940003757A KR970001326B1 (en) 1993-06-24 1994-02-28 High functional duplex stainless steel having a minimized content of molybdenum and a high content of tungsten

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KR93-11576 1993-06-24
KR930011576 1993-06-24
KR1019940003757A KR970001326B1 (en) 1993-06-24 1994-02-28 High functional duplex stainless steel having a minimized content of molybdenum and a high content of tungsten

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6704535B2 (en) * 1996-01-10 2004-03-09 Canon Kabushiki Kaisha Fiber-reinforced intermediate transfer member for electrophotography, and electrophotographic apparatus including same
KR100605678B1 (en) * 1999-11-08 2006-07-31 주식회사 포스코 A heat resistant stainless steel having good heat resistant strength
KR101034869B1 (en) * 2008-11-12 2011-05-17 한국전기연구원 Tubular Nanoporous Oxide Ceramic Membranes and Filters Using the Same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6704535B2 (en) * 1996-01-10 2004-03-09 Canon Kabushiki Kaisha Fiber-reinforced intermediate transfer member for electrophotography, and electrophotographic apparatus including same
KR100605678B1 (en) * 1999-11-08 2006-07-31 주식회사 포스코 A heat resistant stainless steel having good heat resistant strength
KR101034869B1 (en) * 2008-11-12 2011-05-17 한국전기연구원 Tubular Nanoporous Oxide Ceramic Membranes and Filters Using the Same

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