WO2016068291A1 - Acier inoxydable à base de ferrite présentant une haute résistance à la corrosivité provoquée par du gaz d'échappement et la condensation et des propriétés au brasage élevées et procédé pour la fabrication de ce dernier - Google Patents

Acier inoxydable à base de ferrite présentant une haute résistance à la corrosivité provoquée par du gaz d'échappement et la condensation et des propriétés au brasage élevées et procédé pour la fabrication de ce dernier Download PDF

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WO2016068291A1
WO2016068291A1 PCT/JP2015/080751 JP2015080751W WO2016068291A1 WO 2016068291 A1 WO2016068291 A1 WO 2016068291A1 JP 2015080751 W JP2015080751 W JP 2015080751W WO 2016068291 A1 WO2016068291 A1 WO 2016068291A1
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brazing
exhaust gas
stainless steel
steel
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PCT/JP2015/080751
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English (en)
Japanese (ja)
Inventor
雅俊 安部
濱田　純一
信彦 平出
憲博 神野
成雄 福元
農 金子
篤剛 林
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新日鐵住金ステンレス株式会社
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Priority claimed from JP2015210741A external-priority patent/JP6159775B2/ja
Application filed by 新日鐵住金ステンレス株式会社 filed Critical 新日鐵住金ステンレス株式会社
Priority to KR1020177005854A priority Critical patent/KR101959149B1/ko
Priority to KR1020197002307A priority patent/KR102037643B1/ko
Priority to EP15855321.4A priority patent/EP3214198B1/fr
Priority to CN201580047756.4A priority patent/CN106715741B/zh
Priority to MX2017002911A priority patent/MX2017002911A/es
Priority to US15/504,750 priority patent/US20170275723A1/en
Priority to ES15855321T priority patent/ES2922207T3/es
Publication of WO2016068291A1 publication Critical patent/WO2016068291A1/fr
Priority to US16/368,260 priority patent/US10752973B2/en

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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
    • C21D1/26—Methods of annealing
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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    • C21—METALLURGY OF IRON
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    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C—CHEMISTRY; METALLURGY
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    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
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    • C21—METALLURGY OF IRON
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    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273—Final recrystallisation annealing
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    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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    • 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
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    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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    • C22C38/00—Ferrous alloys, e.g. steel alloys
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    • C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
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    • C22C38/00—Ferrous alloys, e.g. steel alloys
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    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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
    • C21D2211/005—Ferrite

Definitions

  • the EGR cooler is generally assembled by brazing and a high brazing property is required for the parts to be used.
  • the wettability of the surface is important in order to improve the brazing property.
  • Ti is more easily oxidized than Fe and Cr, and forms an oxide film with low wettability on the surface. For this reason, it is desirable to lower the Ti content.
  • Al forms an oxide film with low wettability on the surface.
  • the surface roughness of the steel plate greatly affects the wettability, it is also very important to control the surface properties by controlling the manufacturing conditions.
  • B 0.0002 to 0.0030%
  • Ca 0.0002 to 0.0100%
  • Zr 0.010 to 0.300%
  • Co 0.010 to 0.300%
  • Ga 0.0001 to 0.0100%
  • Ta 0.0001 to 0.0100%
  • REM 0.001 to 0.200%
  • Si promotes the generation of Ti-based oxides by increasing the activity of Ti
  • the rolling oil may be mineral oil or water-soluble oil.
  • V In improving corrosion resistance, V can be contained in an amount of 0.300% or less. It is a V amount of 0.010% or more that a stable effect can be obtained. The amount of V is more preferably 0.020 to 0.050%.
  • Ca is added for desulfurization, but if an excessive amount of Ca is added, water-soluble inclusions CaS are generated and the corrosion resistance is lowered. Therefore, Ca can be added in an amount of 0.0002 to 0.0100%. The amount of Ca is more desirably 0.0002 to 0.0050%.
  • the annealing process of the cold-rolled sheet includes a process in which the steel sheet is retained at 650 to 950 ° C. for 5.0 s or more, and the steel sheet is 80.degree. It is desirable to have a step of staying for 0 s or less.
  • a test piece having both a width and a length of 100 mm was cut out from the produced steel plate.
  • the arithmetic average roughness of the steel surface in each of the rolling direction (L direction), the direction perpendicular to the rolling direction (C direction), and the direction inclined 45 ° to the rolling direction (V direction) It measured using the shape measuring machine.
  • the measurement length was 4.0 mm
  • the measurement speed was 0.30 mm / s
  • the cutoff wavelength was 0.8 mm.
  • the average value of three measurement results was defined as the arithmetic average roughness in that direction.
  • the residence time of the steel sheet at 650 to 950 ° C. was set to 5.0 s or more, and the residence time of the steel sheet at 950 to 1050 ° C. was set to 80.0 s or less. It can be seen that the change in the grain size number before and after the brazing heat treatment is 5.0 or less in the steel type manufactured under these conditions.
  • the ferritic stainless steel having excellent corrosion resistance against exhaust gas condensate of the present invention is suitable as a member used in exhaust gas recirculation devices such as automobile mufflers, exhaust heat recovery devices, and EGR (Exhaust Gas Recirculation) coolers.
  • exhaust gas recirculation devices such as automobile mufflers, exhaust heat recovery devices, and EGR (Exhaust Gas Recirculation) coolers.

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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 Sheet Steel (AREA)

Abstract

L'invention porte sur un acier inoxydable à base de ferrite, contenant 0,001 à 0,030 % en masse de C, 0,01 à 1,00 % en masse de Si, 0,01 à 2,00 % en masse de Mn, 0,050 % en masse ou moins de P, 0,0100 % en masse ou moins de S, 11,0 à 30,0 % en masse de Cr, 0,01 à 3,00 % en masse de Mo, 0,001 à 0,050 % en masse de Ti, 0,001 à 0,030 % en masse d'Al, 0,010 à 1,000 % en masse de Nb et 0,050 % en masse ou moins de N, la partie restante comprenant du Fe et des impuretés inévitables. De plus, les quantités (% en masse) de Al, Ti et Si satisfont à la relation Al/Ti ≥ 8,4 Si - 0,78.
PCT/JP2015/080751 2014-10-31 2015-10-30 Acier inoxydable à base de ferrite présentant une haute résistance à la corrosivité provoquée par du gaz d'échappement et la condensation et des propriétés au brasage élevées et procédé pour la fabrication de ce dernier WO2016068291A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
KR1020177005854A KR101959149B1 (ko) 2014-10-31 2015-10-30 내 배기 가스 응축수 부식성과 브레이징성이 우수한 페라이트계 스테인리스 강 및 그 제조 방법
KR1020197002307A KR102037643B1 (ko) 2014-10-31 2015-10-30 내 배기 가스 응축수 부식성과 브레이징성이 우수한 페라이트계 스테인리스 강 및 그 제조 방법
EP15855321.4A EP3214198B1 (fr) 2014-10-31 2015-10-30 Acier inoxydable à base de ferrite présentant une haute résistance à la corrosivité provoquée par du gaz d'échappement et la condensation et des propriétés au brasage élevées et procédé pour la fabrication de ce dernier
CN201580047756.4A CN106715741B (zh) 2014-10-31 2015-10-30 耐排气冷凝水腐蚀性和钎焊性优良的铁素体系不锈钢及其制造方法
MX2017002911A MX2017002911A (es) 2014-10-31 2015-10-30 Acero inoxidable a base de ferrita con alta resistencia a la corrosividad provocada por gas de escape y condensacion y altas propiedades de soldadura fuerte y metodo para fabricar el mismo.
US15/504,750 US20170275723A1 (en) 2014-10-31 2015-10-30 Ferrite-based stainless steel with high resistance to corrosiveness caused by exhaust gas and condensation and high brazing properties and method for manufacturing same
ES15855321T ES2922207T3 (es) 2014-10-31 2015-10-30 Acero inoxidable a base de ferrita con alta resistencia a la corrosión provocada por gases de escape y condensación y altas propiedades de soldadura fuerte y método de fabricación del mismo
US16/368,260 US10752973B2 (en) 2014-10-31 2019-03-28 Ferrite-based stainless steel with high resistance to corrosiveness caused by exhaust gas and condensation and high brazing properties and method for manufacturing same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2014222201 2014-10-31
JP2014-222201 2014-10-31
JP2015-210741 2015-10-27
JP2015210741A JP6159775B2 (ja) 2014-10-31 2015-10-27 耐排ガス凝縮水腐食性とろう付け性に優れたフェライト系ステンレス鋼及びその製造方法

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US16/368,260 Division US10752973B2 (en) 2014-10-31 2019-03-28 Ferrite-based stainless steel with high resistance to corrosiveness caused by exhaust gas and condensation and high brazing properties and method for manufacturing same

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WO2019159606A1 (fr) * 2018-02-14 2019-08-22 Ｊｆｅスチール株式会社 Acier inoxydable ferritique

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