EP0109350B1 - Nickel-Chromlegierung - Google Patents

Nickel-Chromlegierung Download PDF

Info

Publication number
EP0109350B1
EP0109350B1 EP83730106A EP83730106A EP0109350B1 EP 0109350 B1 EP0109350 B1 EP 0109350B1 EP 83730106 A EP83730106 A EP 83730106A EP 83730106 A EP83730106 A EP 83730106A EP 0109350 B1 EP0109350 B1 EP 0109350B1
Authority
EP
European Patent Office
Prior art keywords
alloy
temperature
less
resistance
thermal treatment
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
EP83730106A
Other languages
English (en)
French (fr)
Other versions
EP0109350A2 (de
EP0109350A3 (en
Inventor
Toshio Takasago Technical Institute Yonezawa
Nobuya Takasago Technical Institute Sasaguri
Kichiro Takasago Technical Institute Onimura
Hiroshi Takasago Technical Institute Susukida
Katsuji Takasago Technical Institute Kawaguchi
Takaya C/O Kobe Shipyard & Engine Works Kusakabe
Hiroo Nagano
Takao Minami
Kazuo Yamanaka
Yasutaka Okada
Mamoru Inoue
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.)
Mitsubishi Heavy Industries Ltd
Nippon Steel Corp
Original Assignee
Mitsubishi Heavy Industries Ltd
Sumitomo Metal Industries Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27469183&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0109350(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP57197362A external-priority patent/JPS5985850A/ja
Priority claimed from JP10409583A external-priority patent/JPS59232246A/ja
Priority claimed from JP10409483A external-priority patent/JPS59229457A/ja
Priority claimed from JP58156427A external-priority patent/JPS6050134A/ja
Application filed by Mitsubishi Heavy Industries Ltd, Sumitomo Metal Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0109350A2 publication Critical patent/EP0109350A2/de
Publication of EP0109350A3 publication Critical patent/EP0109350A3/en
Application granted granted Critical
Publication of EP0109350B1 publication Critical patent/EP0109350B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon

Definitions

  • the present invention relates to a non-deposition hardening type nickel based alloy which will be subjected to a high-temperature and high-pressure water or vapor and which has a remarkably improved crystal boundary etching resistance, mechanical properties and pitting corrosion resistance, in addition to the maintenance of a stress corrosion cracking resistance, and further has a bettered stress corrosion resistance in an aqueous NaOH solution.
  • the present invention relates to a nickel-chromium alloy excellent in a stress corrosion cracking resistance, more specifically, to a nickel-chromium alloy in which the stress corrosion cracking resistance is noticeably improved by depositing an insolubilized carbide in grains thereof and by strengthening a coating on the surface thereof.
  • nickel based alloys such as INCOROI 800 (trade name), and INCONEL 600 (trade name) and INCONEL 690 (trade name) set forth in Table 1 below.
  • these alloys have further been treated by heating them at a rather lower temperature than a level (hereinafter referred to as TO C), at which a carbide is thoroughly solubilized, alternatively by further additionally specifically heating and retaining them at a temperature of 650 to 750 ° C, in order to improve the crystal boundary etching resistance and stress corrosion cracking resistance.
  • TO C a level
  • TO C a level at which a carbide is thoroughly solubilized
  • the nickel based alloys which have undergone such a conventional thermal treatment are still poor in the pitting corrosion resistance and stress corrosion cracking resistance.
  • an object of the present invention is to provide a method for a thermal treatment of a nickel based alloy without such drawbacks above, i.e. a method for a thermal treatment of a nickel based alloy by which its mechanical properties, pitting corrosion resistance, stress corrosion cracking resistance and crystal boundary etching resistance can be improved.
  • said alloy consisting of, in term of % by weight, 58 % or more of Ni, 25 to 35 % of Cr, 0,003 % or less of B, 0,012 to 0,035 % of C, 1 % or less of Mn, 0,5 % or less of Si, 0,015 % or less of P, 0,015 % or less of S, optionally 0,5 % orless of Al; 0,01 to 1,0 % of Ti; 0,5 to 5,0 % in all, of one or more of Mo, W and V, and the balance being Fe plus impurities.
  • an object of the present invention is to provide an alloy which can overcome such a drawback inherent in the 30% Cr-60% Ni system alloy and which is excellent in a corrosion resistance, especially the stress corrosion cracking resistance so that it may be used for the tubes, the containers and their fittings in the nuclear reactors, the chemical plants and the like in the form of thick-walled plates, round rods or pipes.
  • the inventors of the present case have paid much attention to the fact that the aforesaid 30% Cr-60% Ni based alloy is finally annealed at a relatively high temperature of 980 to 1150°C in compliance with a carbon content and is used in a state of including no insolubilized carbide, and they have researched into a relation between a morphology of the carbide in the alloy system and its corrosiveness. As a result, it has been found that an active deposition of the carbide, if in the grains thereof, is rather effective for the improvement in the stress corrosion cracking resistance.
  • Japanese Patent Disclosure No. 25216/1979 discloses a method in which after a final annealing treatment, the alloy is successively heated and retained at a temperature of 550 to 850 C for a period of 1 to 100 hours in order to deposit a carbide on crystal boundaries, thereby heightening the SCC resistance.
  • a resistance to the stress corrosion cracking caused by the alkaline concentrate i.e. an alkali stress corrosion cracking resistance and the pitting corrosion resistance cannot be improved.
  • the nickel based alloy obtained by such a conventional method cannot always provide a satisfactory combination of the alkali stress corrosion cracking resistance and the pitting corrosion resistance.
  • an object of the present invention is to provide a method of preparing an alloy for a heat transfer pipe excellent in the corrosion resistance, especially an alloy for a heat transfer pipe excellent in the alkali stress corrosion cracking resistance and the pitting corrosion resistance.
  • the nickel based alloy inter alia the high Cr-Ni based alloy including 25 to 35% of Cr is small in the solubility of C therein, Cr carbide deposits on crystal boundaries during the cooling process or practical use after the annealing step in order to form Cr-poor layers thereon, so that the stress corrosion cracking will take place thereon.
  • the present invention is characterized by an alloy for heat transfer pipes excellent in an alkali stress corrosion cracking resistance which is obtained by heating and retaining said alloy at a temperature within the range of a temperature (T ⁇ C), at which a carbide in said alloy is thoroughly solubilized, to T + 100°C for 1 minute or more; cooling it once to a level of 200 C or less; and carrying out a thermal treatment under conditions within a hatched range Z in Figure 5.
  • T ⁇ C a temperature
  • the present invention is directed to the alloy for a heat transfer pipe which is excellent in the alkali stress corrosion cracking resistance and the pitting corrosion resistance in the alkaline environments, but in a preferred embodiment, it is directed to the alloy for a heat transfer pipe on the secondary side of a nuclear reactor, for example a heat transfer pipe of a steam generator in a pressurized water reactor.
  • FIGS. 1 to 3 the detailed description will be made to an alloy to be treated.
  • the content of Cr is less than 25%, the alloy will have a less crystal boundary etching resistance and stress corrosion cracking resistance; when it is more than 35%, abnormal substances will deposit in the second thermal treatment process, which fact will lead to the deterioration in ductility. Therefore, the content of Cr is within the range of 25 to 35%.
  • the content of B is 0.003% or less.
  • the content of C is less than 0.012%, the alloy will have an insufficient strength; when it is in excess of 0.035%, it will be poor in the stress corrosion cracking resistance. Therefore, the content of C is within the range of 0.012 to 0.035%.
  • Elements P, S and the like are incorporated into the product as impurities during a process of a usual iron manufacture or steel manufacture, but too much impurities have bad influence upon the corrosion resistance. Therefore, the content of P is 0.015% or less and that of S is also 0.015% or less.
  • Mn and Si are added for the sake of a deoxidation, a reinforcement of a matrix and a reinforcement of grain boundaries, but when the content of Mn is more than 1%, the alloy will be hard to melt, and when the content of Si is more than 0.5%, the alloy will be poor in welding properties. Therefore, the content of Mn is 1 % or less, and that of Si is limited to 0.5% or less.
  • the retention time is prolonged with the increase in the wall thickness of the material, hence it is impossible to uniformly define the retention time.
  • the retention time takes 30 minutes or so per 2.54 cm (1 inch) of the material thickness, and in the case that the material thickness is 2.54 cm or less, 1 to 30 minutes will be usually taken.
  • the alloy is cooled, for example, from a level of 200 C to room temperature.
  • the cooling rate less than a furnace cooling rate is not advantageous, but any rate of the furnace cooling rate or more is in fact satisfactory.
  • the cooling rate of the furnace cooling rate or more can be obtained by, for example, the furnace cooling, an air cooling, gas cooling, oil cooling, water cooling and the like.
  • the nickel based alloy according to the present invention can noticeably improve the crystal boundary etching resistance, pitting corrosion resistance, mechanical properties and stress corrosion cracking resistance, therefore this invention is most suitable for the thermal treatment for materials which will be subjected to a high-temperature and high-pressure water of 200 to 400 C, for example, materials for a container for giving off vapor in a nuclear reactor and materials for a cooling system in the nuclear reactor.
  • the specific thermal treatment is carried out by retaining a temperature of 600 to 750 °C for 0.1 to 100 hours as shown in Figure 5, whereby the carbide will semicontinuously deposit on the crystal boundaries and the Cr-poor layers in the vicinity of positions where the carbide exists will recover, thereby increasing the crystal boundary stress corrosion cracking resistance.
  • the reason why such specific thermal treatment conditions are restricted to the hatched range (Z) in Figure 5 is as follows: On the left side of the hatched range (Z) in Figure 5, the retention time is lacking. As a result, the Cr carbide will deposit on the crystal boundaries and the Cr-poor layers formed there-around will hot enough recover, so that the SCC resistance cannot be obtained to a satisfactory degree.
  • the hatched range (Z) terminates at a position corresponding to 100 hours.
  • Such a restriction is for an economical reason, though the farther prolonged heating treatment is good for the SCC resistance.
  • temperature when it is less than 600 C, diffusion rates of Cr and C will be low.
  • the very longtime heating operation will be required, which fact is not practical. Therefore, the lower limit of the temperature is set to 600 ° C.
  • the thermal treatment conditions in the present invention are restricted to the hatched range (Z) surrounded by points A (10 1 hours, 750 C), B (10 2 hours, 750 ° C) and C (10 2 hours, 600 C) in Figure 15.
  • the alkali stress corrosion cracking test was accomplished by polishing the specimens with emery paper No. 320; bending them into a U-shape and holding them with bolts and nuts; immersing them in a solution including 30% of NaOH in an autoclave container (a high-temperature and high-pressure container) at 325° C for 2000 hours; and, after the completion of the immersion process, measuring a depth of cracks by a microscope.
  • an autoclave container a high-temperature and high-pressure container
  • Figure 5 presents the stress corrosion cracking test results of the specimens of alloy No. 1 under the above-mentioned alkaline conditions.
  • white circles and black circles represent specimens having cracks less than 25 ⁇ in depth and those having cracks more than 25 ⁇ in depth, respectively.
  • the specimens in the hatched range (Z) surrounded by points A, B and C have good alkali stress corrosion cracking resistance.
  • the alloys according to the present invention other than alloy No. 1 also had substantially similar results.
  • Table 7 summarizes the results of the corrosion resistance under the same conditions as in Figure 6.
  • circles, triangles and crosses represent specimens not having any pitting corrosion, those having the slight pitting corrosions and those having the pitting corrosions. It can be understood from these results that the alloys according to the present invention are more excellent in the pitting corrosion resistance, as compared with the conventional alloys. Particularly, when the total amount of Mo, V and W to be added is 1.0% or more, the alloy can have the extremely excellent pitting corrosion resistance.
  • the alloy according to the present invention is excellent in the pitting corrosion resistance, the stress corrosion cracking resistance and the alkali stress corrosion cracking resistance, and, in place of the conventional Alloy 600, the alloy according to the present invention can be thus used, for example, particularly for a heat transfer pipe of a steam generator in a pressurized water reactor.

Landscapes

  • 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 Nonferrous Metals Or Alloys (AREA)

Claims (2)

1. Verfahren zur Herstellung einer Nickel-Chrom-Legierung für ein Material,das Wasser oder Dampf mit hohen Temperaturen und hohem Druck ausgesetzt ist,wobei in einer ersten Wärmebehandlungsstufe die Nickelbasislegierung erhitzt und bei einer Temperatur T ° C(bei der Chromkarbide völlig gelöst sind)bis(T+100) °C gehalten wird,wobei diese der schraffierten Zone in Fig.4 entspricht und abgekühlt wird mit einer Abkühlgeschwindigkeit einer Ofenabkühlung oder mehr, wobei die Nickelbasislegierung dann gehalten wird bei einer Temperatur von 600 bis 750 ° C innerhalb eines Wiedersensibilisierungs- bereiches,der der schraffierten Zone in Fig.2 entspricht und zwar für eine Zeitdauer von 0,1bis100 Stunden und abgekühlt wird mit einer Abkühlgeschwindigkeit einer Ofenabkühlung oder mehr, wobei die Legierung in Gewichtsprozenten besteht aus 58% oder mehr Ni,25bis35%Cr,0,003%oder weniger B,0,012bis0,035% C,1% oder weniger Mn,0,5%oder weniger Si,0,015%oder weniger P,0,015%oder weniger S,eventuell 0,5 oder weniger Ai,0,01bis1,0% Ti,0,5 bis 5,0% insg.von einem oder mehreren Mo,W und V und wobei der Rest Eisen und Verunreinigungen ist.
2. Verfahren nach Anspruch 1,wobei das Material nach der ersten Behandlung auf 200 ° C oder weniger abgekühlt wird und die zweite Behandlung unter Bedingungen,die innerhalb des schraffierten Bereiches(2) in Figur 5 liegen,ausgeführt wird.
EP83730106A 1982-11-10 1983-11-09 Nickel-Chromlegierung Expired - Lifetime EP0109350B1 (de)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP197362/82 1982-11-10
JP57197362A JPS5985850A (ja) 1982-11-10 1982-11-10 Ｎｉ基合金の熱処理法
JP104095/83 1983-06-13
JP10409583A JPS59232246A (ja) 1983-06-13 1983-06-13 耐応力腐食割れ性に優れたＮｉ−Ｃｒ合金
JP10409483A JPS59229457A (ja) 1983-06-13 1983-06-13 耐応力腐食割れ性に優れたＮｉ基高Ｃｒ合金
JP104094/83 1983-06-13
JP156427/83 1983-08-29
JP58156427A JPS6050134A (ja) 1983-08-29 1983-08-29 伝熱管用合金およびその製造方法

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP19890103551 Division-Into EP0329192B1 (de) 1982-11-10 1983-11-09 Nickel-Chrom-Legierung
EP89103551.1 Division-Into 1983-11-09

Publications (3)

Publication Number Publication Date
EP0109350A2 EP0109350A2 (de) 1984-05-23
EP0109350A3 EP0109350A3 (en) 1987-08-26
EP0109350B1 true EP0109350B1 (de) 1991-10-16

Family

ID=27469183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83730106A Expired - Lifetime EP0109350B1 (de) 1982-11-10 1983-11-09 Nickel-Chromlegierung

Country Status (2)

Country Link
EP (1) EP0109350B1 (de)
DE (2) DE3382737T2 (de)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235075B1 (de) * 1986-01-20 1992-05-06 Mitsubishi Jukogyo Kabushiki Kaisha Legierung auf Nickelbasis und Verfahren zu ihrer Herstellung
FR2596066B1 (fr) * 1986-03-18 1994-04-08 Electricite De France Alliage austenitique nickel-chrome-fer
US4798633A (en) * 1986-09-25 1989-01-17 Inco Alloys International, Inc. Nickel-base alloy heat treatment
US4969964A (en) * 1989-05-19 1990-11-13 Inco Alloys International, Inc. Heat treatment method for reducing polythionic acid stress corrosion cracking
GB8922161D0 (en) * 1989-10-02 1989-11-15 Inco Alloys Ltd Exhaust valve alloy
US5211911A (en) * 1992-03-09 1993-05-18 Epri High vanadium austenitic heat resistant alloy
RO122761B1 (ro) 2001-01-23 2010-01-29 Aventis Pasteur Vaccin multivalent antimeningococic conţinând polizaharid-proteină
FR2845098B1 (fr) * 2002-09-26 2004-12-24 Framatome Anp Alliage a base de nickel pour la soudure electrique d'alliages de nickel et d'aciers fil de soudage et utilisation
JP3976003B2 (ja) 2002-12-25 2007-09-12 住友金属工業株式会社 ニッケル基合金およびその製造方法
US20040221929A1 (en) 2003-05-09 2004-11-11 Hebda John J. Processing of titanium-aluminum-vanadium alloys and products made thereby
US7837812B2 (en) 2004-05-21 2010-11-23 Ati Properties, Inc. Metastable beta-titanium alloys and methods of processing the same by direct aging
KR101399795B1 (ko) * 2006-08-08 2014-05-27 헌팅턴 앨로이즈 코오포레이션 용접 금속 및 용접에서 사용되는 물품, 용접물 및 용접물의제조 방법
US10053758B2 (en) 2010-01-22 2018-08-21 Ati Properties Llc Production of high strength titanium
US9255316B2 (en) 2010-07-19 2016-02-09 Ati Properties, Inc. Processing of α+β titanium alloys
US8499605B2 (en) 2010-07-28 2013-08-06 Ati Properties, Inc. Hot stretch straightening of high strength α/β processed titanium
US8613818B2 (en) 2010-09-15 2013-12-24 Ati Properties, Inc. Processing routes for titanium and titanium alloys
US9206497B2 (en) 2010-09-15 2015-12-08 Ati Properties, Inc. Methods for processing titanium alloys
US10513755B2 (en) 2010-09-23 2019-12-24 Ati Properties Llc High strength alpha/beta titanium alloy fasteners and fastener stock
US8652400B2 (en) * 2011-06-01 2014-02-18 Ati Properties, Inc. Thermo-mechanical processing of nickel-base alloys
US9050647B2 (en) 2013-03-15 2015-06-09 Ati Properties, Inc. Split-pass open-die forging for hard-to-forge, strain-path sensitive titanium-base and nickel-base alloys
US9869003B2 (en) 2013-02-26 2018-01-16 Ati Properties Llc Methods for processing alloys
US9192981B2 (en) 2013-03-11 2015-11-24 Ati Properties, Inc. Thermomechanical processing of high strength non-magnetic corrosion resistant material
US9777361B2 (en) 2013-03-15 2017-10-03 Ati Properties Llc Thermomechanical processing of alpha-beta titanium alloys
US11111552B2 (en) 2013-11-12 2021-09-07 Ati Properties Llc Methods for processing metal alloys
US10094003B2 (en) 2015-01-12 2018-10-09 Ati Properties Llc Titanium alloy
US10502252B2 (en) 2015-11-23 2019-12-10 Ati Properties Llc Processing of alpha-beta titanium alloys
CN115247225B (zh) * 2022-03-09 2023-04-28 江西宝顺昌特种合金制造有限公司 一种中频炉冶炼uns n06600合金的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR483744A (fr) * 1916-01-04 1917-08-02 Driver Harris Wire Company Perfectionnements aux objets soumis à de hautes températures externes
DE2809081A1 (de) * 1977-03-04 1978-09-14 Hitachi Ltd Legierung des eisen-nickel-chrom-molybdaen-systems mit hoher festigkeit und duktilitaet sowie verwendung dieser legierung
FR2507630A1 (fr) * 1981-06-10 1982-12-17 Sumitomo Metal Ind Alliage perfectionne pour la fabrication de chemisages et de tubes a haute resistance mecanique pour puits profonds

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB483744A (en) * 1936-10-28 1938-04-26 William Spencer Percival Improvements in or relating to thermionic valve amplifying circuits
US3303531A (en) * 1965-02-26 1967-02-14 Engelhard Ind Inc Spinnerette
AT294438B (de) * 1968-02-08 1971-11-25 Int Nickel Ltd Nickellegierungen
JPS5425216A (en) 1977-07-29 1979-02-26 Mitsubishi Heavy Ind Ltd Heat-treatment method for ni-based alloy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR483744A (fr) * 1916-01-04 1917-08-02 Driver Harris Wire Company Perfectionnements aux objets soumis à de hautes températures externes
DE2809081A1 (de) * 1977-03-04 1978-09-14 Hitachi Ltd Legierung des eisen-nickel-chrom-molybdaen-systems mit hoher festigkeit und duktilitaet sowie verwendung dieser legierung
FR2507630A1 (fr) * 1981-06-10 1982-12-17 Sumitomo Metal Ind Alliage perfectionne pour la fabrication de chemisages et de tubes a haute resistance mecanique pour puits profonds

Also Published As

Publication number Publication date
DE3382737T2 (de) 1994-05-19
DE3382433D1 (de) 1991-11-21
DE3382737D1 (de) 1994-03-10
EP0109350A2 (de) 1984-05-23
EP0109350A3 (en) 1987-08-26

Similar Documents

Publication Publication Date Title
EP0109350B1 (de) Nickel-Chromlegierung
CN100467624C (zh) 制备具有改良抗蚀性的不锈钢的方法
CN102245345B (zh) 奥氏体系焊接材料以及使用了该材料的应力腐蚀开裂预防维护方法和晶界腐蚀预防维护方法
Streicher Theory and Application of Evaluation Tests for Detecting Susceptibility to Intergranular Attack in Stainless Steels and Related Alloys—Problems and Opportunities
US4162930A (en) Austenitic stainless steel having excellent resistance to intergranular and transgranular stress corrosion cracking
US4714501A (en) Method for thermal treatment of alloy for heat transfer pipes
Blair Cast stainless steels
US4201574A (en) Low carbon Ni-Cr austenitic steel having an improved resistance to stress corrosion cracking
EP0384013A1 (de) Verfahren zur Verstärkung von kaltgeformten Legierungen auf Nickelbasis
EP0964072B1 (de) Austenitischer rostfreier stahl mit widerstand gegen schädigung durch neutronenstrahlung
US4710237A (en) Method for thermal treatment of nickel based alloy materials
JPS58177444A (ja) Ｎｉ−Ｃｒ合金の熱処理法
US4715909A (en) Nickel-chromium alloy in stress corrosion cracking resistance
EP1087028B1 (de) Hochchromhaltiger, hitzebeständiger, ferritischer Stahl
JPS62180043A (ja) 耐熱衝撃割れ感受性、耐食性および機械的性質にすぐれるオ−ステナイト・フエライト２相ステンレス鋳鋼
EP0329192B1 (de) Nickel-Chrom-Legierung
JPH05112842A (ja) 低被曝性で耐アルカリ腐食性の良好なＮｉ−Ｃｒ合金
JPH06128671A (ja) 耐応力腐食割れ性に優れた合金
JP2677135B2 (ja) 耐応力腐食割れ性に優れた合金
JP2001152293A (ja) 高Ｃｒフェライト系耐熱鋼
Debray et al. Materials in the primary circuit of water-cooled power reactors
JPH0153340B2 (de)
JPS60245773A (ja) 高耐食性Ｎｉ基合金の製造方法
JPS5817823B2 (ja) Ｃｒを含有するＮｉ基合金の熱処理方法
Bednar Chloride Stress Corrosion Cracking in Nonsensitized Ferritic Stainless Steel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR SE

17P Request for examination filed

Effective date: 19840514

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR SE

17Q First examination report despatched

Effective date: 19880629

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR SE

XX Miscellaneous (additional remarks)

Free format text: TEILANMELDUNG 89103551.1 EINGEREICHT AM 09/11/83.

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3382433

Country of ref document: DE

Date of ref document: 19911121

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: VALINOX

Effective date: 19920707

26 Opposition filed

Opponent name: FRAMATOME

Effective date: 19920713

Opponent name: SIEMENS AKTIENGESELLSCHAFT, BERLIN UND MUENCHEN

Effective date: 19920714

Opponent name: VALINOX

Effective date: 19920707

EAL Se: european patent in force in sweden

Ref document number: 83730106.8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19981105

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19981110

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19981116

Year of fee payment: 16

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19990113

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO