EP1281785B1 - Acier inoxydable austénique pour déformation à froid pouvant être suivi d'un usinage - Google Patents

Acier inoxydable austénique pour déformation à froid pouvant être suivi d'un usinage Download PDF

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Publication number
EP1281785B1
EP1281785B1 EP02291881A EP02291881A EP1281785B1 EP 1281785 B1 EP1281785 B1 EP 1281785B1 EP 02291881 A EP02291881 A EP 02291881A EP 02291881 A EP02291881 A EP 02291881A EP 1281785 B1 EP1281785 B1 EP 1281785B1
Authority
EP
European Patent Office
Prior art keywords
steel
composition
stainless steel
nickel
austenitic stainless
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02291881A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1281785A3 (fr
EP1281785A2 (fr
Inventor
Jean-Michel Hauser
Raphael Craen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ugitech SA
Aperam Stainless France SA
Original Assignee
Ugitech SA
Aperam Stainless France SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ugitech SA, Aperam Stainless France SA filed Critical Ugitech SA
Publication of EP1281785A2 publication Critical patent/EP1281785A2/fr
Publication of EP1281785A3 publication Critical patent/EP1281785A3/fr
Application granted granted Critical
Publication of EP1281785B1 publication Critical patent/EP1281785B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • C22C38/18—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
    • 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
    • C21D2261/00—Machining or cutting being involved
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars

Definitions

  • the invention relates to austenitic stainless steel for cold deformation type cold stamping.
  • Steels that contain a minimum of 11% chromium are said to be rustproof and have a good resistance to corrosion.
  • the austenitic stainless steels also contain nickel, which gives them advantageous properties of implementation, especially in cold processing.
  • One of the austenitic steels most commonly used is a steel whose composition is as follows: C ⁇ 0.08, Si ⁇ 1%, Mn ⁇ 2%, S ⁇ 03%, P ⁇ 0.045%, 18 ⁇ Cr20%, 8 ⁇ Ni ⁇ 12%, which lends itself well to cold processing, but is limited in the field of deformation due to its relatively high work hardening coefficient, defining a significant consolidation due to the formation of hardening martensite.
  • Another austenitic stainless steel of the following composition is known: C ⁇ 0.12%; If ⁇ 1%; Mn ⁇ 2%; S ⁇ 0.03%; P ⁇ 0.045%; 17 ⁇ Cr ⁇ 19%; 10 ⁇ Ni ⁇ 13%, which provides a solution to the problem of hardenability due to a relatively high nickel content, which reduces the formation of hardening martensite.
  • the presence of nickel at these levels also limits the elongation properties of the steel, moreover, this steel is expensive given the high nickel content.
  • Copper acts as nickel by limiting the formation of martensite hardening.
  • there is an upper limit for the use of copper typically 3.5%, which can not be exceeded, to avoid a burn phenomenon during the hot rolling of the steel.
  • this higher copper content makes it possible to obtain a good deformation capacity, or even to reduce the nickel content globally to around 8%.
  • Such a steel composition is used in cold stamping long stainless steel products.
  • This composition is recommended especially for cold-heading applications, for which it offers a low coefficient of work hardening thanks to very high levels of nickel and manganese.
  • EP 0 976 541 A discloses a composite wire comprising a carbon steel core and a stainless steel coating.
  • the composition of the stainless steel whose structure is predominantly martensitic after drawing, comprises 0.005 to 0.05% of C, 0.005 to 0.05% of N, 0.1 to 2% of Si, of 0 , 1 to 5% Mn, 5 to 12% Ni, 10 to 20% Cr, 0 to 3% Mo and 0 to 4% Cu, the remainder being iron and impurities resulting from development.
  • the object of the invention is to propose a cold-workable austenitic stainless steel that can be machined with improved mechanical properties compared with standard austenitic stainless steel steels, properties of great interest for impact-type processing applications. cold,
  • Md30 551 - 462 (C% + N%) - 9.2Si% - 20 Mn% - 13.7 Cr% - 29 Ni% - 29 Cu% - 18, 5 MB% is less than -60.
  • the carbon is controlled to a content of less than 0.030% in order to limit the formation and hardening of martensite hardening. In the same way, and for the same reason, it is necessary to control the sum of the carbon and nitrogen contents to a value of less than 0.07%.
  • the nickel content has been lowered between 4.55% and 7% and preferably about 5%.
  • the lowering of the Ni content is compensated by a manganese content of between 5% and 9% and preferably about 8%.
  • the chromium content guarantees a good resistance to corrosion, it is chosen between 15% and 18%.
  • Copper is present in the composition to stabilize the austenite. It is limited, as specified in the prior art to a content of less than 4%. A content greater than 2% is preferred for better stabilization of the austenite.
  • Sulfur is limited to a content of less than 0.01% and preferably to a content of less than 0.002% in order to limit the formation of manganese sulphides, which is detrimental to hot processing and corrosion resistance.
  • composition also contains molybdenum at less than 0.8% and phosphorus at less than 0.030%.
  • a composition of a steel 1 according to the invention has been compared with a reference standard austenitic steel, the compositions of which are shown in Table 1 below: Table 1.
  • the steel according to the invention has good corrosion resistance, comparable to that of a standard type 304 steel.
  • the steel according to the invention has a non-magnetic character in the annealed state, and weakly magnetic in the hardened state, in weldability, a weldability equivalent to that of a standard type 304 steel and machinability, machinability similar to that of a standard type 304 steel.
  • the steel of the invention is commercially at an attractive cost by using alloy elements that are less expensive than nickel, and it remains easy to use at all stages of its production, in particular thanks to a hot structure. and mechanical properties compatible with production in standard production of standard austenitic stainless steels.
  • the steel of the invention lends itself well to the production of parts comprising a first cold stamping operation followed by finishing machining.
  • the field of its use is potentially fastening such as screws, bolts, nuts, threaded rods, and all special parts implemented by cold stamping such as, for example, fittings, parts for the automobile such as bindings, air-bags, support and body of probes or else, parts for large series connectors such as, for example, electrical fasteners.

Landscapes

  • 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 Sheet Steel (AREA)
  • Heat Treatment Of Articles (AREA)
EP02291881A 2001-07-27 2002-07-25 Acier inoxydable austénique pour déformation à froid pouvant être suivi d'un usinage Expired - Lifetime EP1281785B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0110070A FR2827876B1 (fr) 2001-07-27 2001-07-27 Acier inoxydable austenitique pour deformation a froid pouvant etre suivi d'un usinage
FR0110070 2001-07-27

Publications (3)

Publication Number Publication Date
EP1281785A2 EP1281785A2 (fr) 2003-02-05
EP1281785A3 EP1281785A3 (fr) 2003-05-14
EP1281785B1 true EP1281785B1 (fr) 2013-01-09

Family

ID=8865996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02291881A Expired - Lifetime EP1281785B1 (fr) 2001-07-27 2002-07-25 Acier inoxydable austénique pour déformation à froid pouvant être suivi d'un usinage

Country Status (8)

Country Link
US (1) US20030021716A1 (es)
EP (1) EP1281785B1 (es)
KR (1) KR20030011628A (es)
CA (1) CA2395628C (es)
ES (1) ES2402763T3 (es)
FR (1) FR2827876B1 (es)
MX (1) MXPA02007294A (es)
TW (1) TW554053B (es)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7951900B2 (en) * 2005-06-17 2011-05-31 Eastman Chemical Company Dialysis filter housings comprising polyester compositions formed from 2,2,4,4-tetramethyl-1,3-cyclobutanediol and 1,4-cyclohexanedimethanol
JP4907151B2 (ja) * 2005-11-01 2012-03-28 新日鐵住金ステンレス株式会社 高圧水素ガス用オ−ステナイト系高Ｍｎステンレス鋼
CN100464000C (zh) * 2007-06-12 2009-02-25 江阴康瑞不锈钢制品有限公司 奥氏体冷镦不锈钢及其钢丝的制造方法
SG10201700586QA (en) 2007-11-29 2017-02-27 Ati Properties Inc Lean austenitic stainless steel
KR101467616B1 (ko) 2007-12-20 2014-12-01 에이티아이 프로퍼티즈, 인코퍼레이티드 내부식성 린 오스테나이트계 스테인리스 강
US8337749B2 (en) 2007-12-20 2012-12-25 Ati Properties, Inc. Lean austenitic stainless steel
RU2461641C2 (ru) 2007-12-20 2012-09-20 ЭйТиАй ПРОПЕРТИЗ, ИНК. Аустенитная нержавеющая сталь с низким содержанием никеля и содержащая стабилизирующие элементы
SE533635C2 (sv) 2009-01-30 2010-11-16 Sandvik Intellectual Property Austenitisk rostfri stållegering med låg nickelhalt, samt artikel därav
JP6259621B2 (ja) 2012-09-27 2018-01-10 新日鐵住金ステンレス株式会社 冷間加工性、耐食性に優れた超非磁性軟質ステンレス鋼線材及びその製造方法、鋼線、鋼線コイル並びにその製造方法
EP2813906A1 (fr) * 2013-06-12 2014-12-17 Nivarox-FAR S.A. Pièce pour mouvement d'horlogerie
CN103447348A (zh) * 2013-07-25 2013-12-18 张家港市胜达钢绳有限公司 一种不锈钢线材的制造方法
JP2016069680A (ja) * 2014-09-30 2016-05-09 国立大学法人 名古屋工業大学 ステンレス鋼の制振処理
KR101965524B1 (ko) * 2015-03-06 2019-04-03 닛폰 스틸 앤드 스미킨 스테인레스 스틸 코포레이션 내수소 취화 특성이 우수한 고강도 오스테나이트계 스테인리스강 및 그 제조 방법
US11149324B2 (en) 2015-03-26 2021-10-19 Nippon Steel Stainless Steel Corporation High strength austenitic stainless steel having excellent resistance to hydrogen embrittlement, method for manufacturing the same, and hydrogen equipment used for high-pressure hydrogen gas and liquid hydrogen environment
CN109136757B (zh) * 2018-09-05 2020-10-27 包头钢铁（集团）有限责任公司 中碳冷镦钢线材和中碳冷镦钢线材的生产方法
CN113265585B (zh) * 2021-05-14 2023-02-24 山西太钢不锈钢股份有限公司 一种汽车安全气囊用不锈钢及其生产方法与应用

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US3615365A (en) * 1968-04-18 1971-10-26 Allegheny Ludlum Steel Austenitic stainless steel
US4568387A (en) * 1984-07-03 1986-02-04 Allegheny Ludlum Steel Corporation Austenitic stainless steel for low temperature service
US4814140A (en) * 1987-06-16 1989-03-21 Carpenter Technology Corporation Galling resistant austenitic stainless steel alloy
JPH04272158A (ja) * 1991-02-28 1992-09-28 Nippon Stainless Steel Co Ltd 加工硬化性の少ない非磁性ステンレス鋼
US5286310A (en) * 1992-10-13 1994-02-15 Allegheny Ludlum Corporation Low nickel, copper containing chromium-nickel-manganese-copper-nitrogen austenitic stainless steel
KR950009223B1 (ko) * 1993-08-25 1995-08-18 포항종합제철주식회사 프레스 성형성, 열간가공성 및 고온내산화성이 우수한 오스테나이트계 스테인레스강
JPH08283915A (ja) * 1995-04-12 1996-10-29 Nkk Corp 加工性に優れたオーステナイトステンレス鋼
US5788922A (en) * 1996-05-02 1998-08-04 Crs Holdings, Inc. Free-machining austenitic stainless steel
FR2766843B1 (fr) * 1997-07-29 1999-09-03 Usinor Acier inoxydable austenitique comportant une tres faible teneur en nickel
JP4207137B2 (ja) * 1998-02-16 2009-01-14 日立金属株式会社 高硬度高耐食ステンレス鋼
FR2776306B1 (fr) * 1998-03-18 2000-05-19 Ugine Savoie Sa Acier inoxydable austenitique pour l'elaboration notamment de fil
EP0976541B1 (fr) * 1998-07-30 2003-03-26 Aster Fil composite comprenant une ame en acier au carbone et une couche externe en acier inoxydable

Also Published As

Publication number Publication date
MXPA02007294A (es) 2003-09-04
EP1281785A3 (fr) 2003-05-14
EP1281785A2 (fr) 2003-02-05
TW554053B (en) 2003-09-21
CA2395628C (fr) 2010-11-23
US20030021716A1 (en) 2003-01-30
FR2827876B1 (fr) 2004-06-18
ES2402763T3 (es) 2013-05-08
CA2395628A1 (fr) 2003-01-27
FR2827876A1 (fr) 2003-01-31
KR20030011628A (ko) 2003-02-11

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