EP0742845A1 - Acier inoxydable austenitique pour emploi a chaud - Google Patents

Acier inoxydable austenitique pour emploi a chaud

Info

Publication number
EP0742845A1
EP0742845A1 EP95941782A EP95941782A EP0742845A1 EP 0742845 A1 EP0742845 A1 EP 0742845A1 EP 95941782 A EP95941782 A EP 95941782A EP 95941782 A EP95941782 A EP 95941782A EP 0742845 A1 EP0742845 A1 EP 0742845A1
Authority
EP
European Patent Office
Prior art keywords
chemical composition
stainless steel
steel according
steel
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.)
Ceased
Application number
EP95941782A
Other languages
German (de)
English (en)
French (fr)
Inventor
James Henry Davidson
Williams Résidence Château-des-Perrières MIHOUB
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.)
Imphy SA
Original Assignee
Imphy 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 Imphy SA filed Critical Imphy SA
Publication of EP0742845A1 publication Critical patent/EP0742845A1/fr
Ceased legal-status Critical Current

Links

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
    • 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

Definitions

  • the invention relates to an austenitic stainless steel for hot use.
  • Alloy 286 is an austenitic superalloy containing approximately 26% Nickel, 15% Chromium, 1.25% Molybdenum and 2% Titanium. Titanium is intended to form hardening precipitates of ⁇ phase ⁇ These alloys can be used up to 700 ° C but not beyond because, above this temperature, the ⁇ 'phase is unstable and tends to transform into ⁇ phase which is less hardening. In addition, the nickel content being high, these alloys are expensive.
  • Martensitic stainless steels contain around 12% chromium and little or no nickel, so that their price is significantly lower than that of alloys of type 286, but on the other hand, they can only be used up to 600 ° C, which is insufficient for some applications.
  • the object of the present invention is to remedy these drawbacks by proposing a stainless steel for hot use which is more economical than alloys of type 286 and which has hot mechanical characteristics comparable to or even superior to those of these alloys.
  • the invention relates to an austenitic stainless steel for hot use, the chemical composition, by weight, comprises:
  • the austenitic matrix has an optimal composition, it is preferable that:
  • Ni is the nickel content of the steel
  • Cr is the chromium content
  • F is calculated by the formula:
  • the steel When the steel is produced by reflow of scrap alloys or steel, it may also contain residual elements such as Silicon, Copper, Cobalt, or Vanadium, in contents of less than 0.5% for each of these.
  • the rest of the chemical composition consists of Iron and impurities resulting from the production.
  • This steel can be manufactured in any desired form: sheet metal, bar, profile, wire, forgings.
  • a heat treatment consisting for example of dissolution by heating between 850 ° C and 1050 ° C for about an hour, followed by rapid cooling to avoid uncontrolled precipitation, for example by quenching with water, then an income by holding for 10 to 24 hours at a temperature between 680 ° C and 760 ° C followed by quenching in air.
  • steels A to G are manufactured, the chemical compositions of which, in% by weight, are given by the following table
  • t R is the breaking time
  • a R is the elongation at break
  • ⁇ R is the necking.
  • the properties of the steel according to the invention make it particularly suitable for the manufacture of connecting parts and in particular of bolts for hot use, in particular for assembling parts of a heat engine, and for example, for fixing a turbo compressor on the exhaust manifold of an automobile engine.
  • the steel according to the invention is also very well suited to the manufacture of components for boilers or for steam turbines of thermal power plants, such as casings, exchangers or rotors.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
EP95941782A 1994-12-13 1995-12-07 Acier inoxydable austenitique pour emploi a chaud Ceased EP0742845A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9414942 1994-12-13
FR9414942A FR2727982A1 (fr) 1994-12-13 1994-12-13 Acier inoxydable austenitique pour emploi a chaud
PCT/FR1995/001617 WO1996018750A1 (fr) 1994-12-13 1995-12-07 Acier inoxydable austenitique pour emploi a chaud

Publications (1)

Publication Number Publication Date
EP0742845A1 true EP0742845A1 (fr) 1996-11-20

Family

ID=9469720

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95941782A Ceased EP0742845A1 (fr) 1994-12-13 1995-12-07 Acier inoxydable austenitique pour emploi a chaud

Country Status (8)

Country Link
US (1) US5753178A (enExample)
EP (1) EP0742845A1 (enExample)
JP (1) JPH09506933A (enExample)
KR (1) KR100215531B1 (enExample)
FI (1) FI112872B (enExample)
FR (1) FR2727982A1 (enExample)
TW (1) TW381121B (enExample)
WO (1) WO1996018750A1 (enExample)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832425B1 (fr) * 2001-11-16 2004-07-30 Usinor Alliage austentique pour tenue a chaud a coulabilite et transformation ameliorees
DE602006020424D1 (de) * 2006-06-30 2011-04-14 Arcelormittal Stainless & Nickel Alloys Leiterplatten für Brennstoffzellebauteile
KR101894848B1 (ko) 2014-02-28 2018-09-05 현대자동차주식회사 오스테나이트계 내열합금 및 이를 이용한 내열볼트의 제조방법
CN107075629B (zh) * 2014-09-19 2020-03-24 日本制铁株式会社 奥氏体系不锈钢板
CN105463337A (zh) * 2015-12-04 2016-04-06 苏州金业船用机械厂 一种不锈钢船用螺旋桨
CN108374119B (zh) * 2018-03-19 2020-05-12 东北大学 一种抗拉强度1100MPa无磁不锈钢热轧板及制造方法
DE102020213539A1 (de) * 2020-10-28 2022-04-28 Siemens Energy Global GmbH & Co. KG Legierung, Rohteil, Bauteil aus Austenit sowie ein Verfahren

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2744821A (en) * 1951-12-13 1956-05-08 Gen Electric Iron base high temperature alloy
US2793948A (en) * 1954-08-27 1957-05-28 Nyby Bruk Ab Restorable fe-cr-ni alloy
US3065067A (en) * 1959-01-21 1962-11-20 Allegheny Ludlum Steel Austenitic alloy
US3065068A (en) * 1962-03-01 1962-11-20 Allegheny Ludlum Steel Austenitic alloy
US3795552A (en) * 1971-04-14 1974-03-05 Carpenter Technology Corp Precipitation hardened austenitic ferrous base alloy article
US3708353A (en) * 1971-08-05 1973-01-02 United Aircraft Corp Processing for iron-base alloy
SE369925B (enExample) * 1973-02-20 1974-09-23 Sandvik Ab
JPS6029453A (ja) * 1983-07-29 1985-02-14 Hitachi Ltd 蒸気タ−ビン動翼用Ｃｒ−Νｉ合金
JP2659373B2 (ja) * 1987-07-21 1997-09-30 日立金属株式会社 高温ボルト用素材の製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9618750A1 *

Also Published As

Publication number Publication date
KR100215531B1 (ko) 1999-08-16
WO1996018750A1 (fr) 1996-06-20
FR2727982B1 (enExample) 1997-02-21
US5753178A (en) 1998-05-19
FR2727982A1 (fr) 1996-06-14
FI112872B (fi) 2004-01-30
JPH09506933A (ja) 1997-07-08
FI963149A0 (fi) 1996-08-12
FI963149L (fi) 1996-08-12
TW381121B (en) 2000-02-01
KR970700784A (ko) 1997-02-12

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