EP0087183B1 - Procédé pour la fabrication d'une pièce à grains fins comme produit fini à partir d'un alliage austénitique à base de nickel résistant à la chaleur - Google Patents

Procédé pour la fabrication d'une pièce à grains fins comme produit fini à partir d'un alliage austénitique à base de nickel résistant à la chaleur Download PDF

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Publication number
EP0087183B1
EP0087183B1 EP83200164A EP83200164A EP0087183B1 EP 0087183 B1 EP0087183 B1 EP 0087183B1 EP 83200164 A EP83200164 A EP 83200164A EP 83200164 A EP83200164 A EP 83200164A EP 0087183 B1 EP0087183 B1 EP 0087183B1
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EP
European Patent Office
Prior art keywords
weight
workpiece
deformation
fine
temperature
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Expired
Application number
EP83200164A
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German (de)
English (en)
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EP0087183A1 (fr
Inventor
Gernot Dr. Gessinger
Günther Dr. Schröder
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.)
BBC Brown Boveri AG Switzerland
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BBC Brown Boveri AG Switzerland
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Publication of EP0087183A1 publication Critical patent/EP0087183A1/fr
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    • 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 invention is based on a method for producing a workpiece according to the preamble of claim 1.
  • a fine-grained end product starting from a blank made of a heat-resistant alloy (e.g. nickel superalloy), can be produced in several operations.
  • this applies to a method in which, in a first step, the starting material is deformed in a conventional manner, just below its recrystallization temperature, so that the desired fine-grained structure is established in an intermediate product.
  • this intermediate product is then converted into the end product by quasi-isothermal forging using heated dies (GB-PS 1 253 861).
  • GB-PS 1 253 861 heated dies
  • a method is known from US Pat. No. 3,975,219, according to which a crystal structure, in particular an elongated coarse grain, which is favorable for the high-temperature behavior, is produced in a nickel-based superalloy in the end product.
  • a so-called superplastic state is initially set in order to keep the deformation temperatures and the shaping forces within moderate limits.
  • isothermal forming takes place under very specific temperature and deformation conditions, which are selected so that an elongated coarse grain is obtained during the final zone annealing. If there is a deviation from the optimal parameters, an undesirable fine-grained recrystallization structure is produced.
  • the invention is based on the object of specifying a method which enables the production of a fine-grained finished part from a heat-resistant superalloy which is not in the superplastic state in the delivery state, starting from a workpiece of any grain size in the simplest, cost-effective and time-saving manner.
  • the figure shows a diagram with the relationship between the deformation temperature and the grain size of the structure present in the end product.
  • the deformation temperature T in ° C is plotted on the abscissa on a natural scale, and the mean crystallite diameter d in ⁇ is plotted on the ordinate on a logarithmic scale.
  • the solid line refers to the mean values.
  • the dashed lines indicate the upper and lower limits of the scattering range resulting from the variation of the initial grain size and the test conditions.
  • the invention is not restricted to the exemplary embodiments.
  • Superalloys of the trade names Astroloy, Nim 901, IN 100, Rene 95, MERL 76, A 286 and the like can be used as the starting material.
  • the deformation temperatures can be between approx. 960 ° C and 1200 ° C.
  • the optimal deformation temperature depends on the alloy composition, the workpiece dimension and other process parameters and can be determined from case to case by the practical experiment.
  • the method according to the invention makes it possible to convert forged blanks made of superalloys directly into a fine-grained end product (finished part) in a single operation and in only one heat, regardless of the structural state of the starting material.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)
  • Heat Treatment Of Nonferrous Metals Or Alloys (AREA)

Claims (3)

1. Procédé pour la fabrication thermomécanique d'une pièce à grain fin constituant une pièce finie avec une taille de grain moyenne de 100 µm maximum, en un alliage austénitique à base de nickel, résistant à la chaleur, dans lequel le matériau de départ, dans son état de livraison, ne se trouve pas à l'état superplastique et peut présenter une taille de grain quelconque, dans lequel une pièce est transformée en la pièce finie, en une seule chaude et en une seule opération directement à partir de son état de livraison, par forgeage isotherme dans une matrice dans fe domaine de températures de 960°C a 1200°C avec une vitesse de déformation ε̇ de 1.10-3 s-1 à 1 s-1, ε étant défini comme suit:
Figure imgb0005
avec
Ao = aire de la section du produit avant la déformation
Af = aire de la section du produit après la déformation
In = logarithme naturel
t = temps en secondes.
2. Procédé suivant la revendication 1, caractérisé en ce que l'alliage à base de nickel présente la composition pondérale suivante:
C = 0,03 %
Cr = 19,5 %
Mo = 4.5 %
Co = 14,0 %
Ti = 3,0 %
Al = 1,4%
Fe = 2,0
Ni = solde,

et en ce que la déformation de la pièce est effectuée à une température de 1080°C avec une vitesse ε̇ de 10-3 à 1 s-1.
3. Procédé suivant la revendication 1, caractérisé en ce que l'alliage à base de nickel présente la composition pondérale suivante:
C = 0,05 %
Cr = 18,5 %
Ni = 53,0 %
Mo = 3,0 %
Nb = 5,3 %
Ti = 1,0 %
AI = 0,5 %
Fe = solde,

et en ce que la déformation de la pièce est effectuée à une température de 1050° C avec une vitesse ε̇ de 10-3 à 1 s-1.
EP83200164A 1982-02-18 1983-01-28 Procédé pour la fabrication d'une pièce à grains fins comme produit fini à partir d'un alliage austénitique à base de nickel résistant à la chaleur Expired EP0087183B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1019/82A CH661455A5 (de) 1982-02-18 1982-02-18 Verfahren zur herstellung eines feinkoernigen werkstuecks als fertigteil aus einer warmfesten austenitischen nickelbasislegierung oder aus der legierung a 286.
CH1019/82 1982-02-18

Publications (2)

Publication Number Publication Date
EP0087183A1 EP0087183A1 (fr) 1983-08-31
EP0087183B1 true EP0087183B1 (fr) 1987-04-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200164A Expired EP0087183B1 (fr) 1982-02-18 1983-01-28 Procédé pour la fabrication d'une pièce à grains fins comme produit fini à partir d'un alliage austénitique à base de nickel résistant à la chaleur

Country Status (5)

Country Link
US (1) US4453985A (fr)
EP (1) EP0087183B1 (fr)
JP (1) JPS58151458A (fr)
CH (1) CH661455A5 (fr)
DE (1) DE3371229D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105499477A (zh) * 2016-03-04 2016-04-20 大连大高阀门股份有限公司 核一级爆破阀剪切帽锻造工艺

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH654593A5 (de) * 1983-09-28 1986-02-28 Bbc Brown Boveri & Cie Verfahren zur herstellung eines feinkoernigen werkstuecks aus einer nickelbasis-superlegierung.
CH669396A5 (fr) * 1986-09-02 1989-03-15 Bbc Brown Boveri & Cie
US5693159A (en) * 1991-04-15 1997-12-02 United Technologies Corporation Superalloy forging process
JP4485747B2 (ja) 2001-05-15 2010-06-23 株式会社三徳 金属合金の鋳造形の製造方法
US6705385B2 (en) 2001-05-23 2004-03-16 Santoku America, Inc. Castings of metallic alloys with improved surface quality, structural integrity and mechanical properties fabricated in anisotropic pyrolytic graphite molds under vacuum
DE60219796T2 (de) 2001-06-11 2008-01-17 Santoku America, Inc., Tolleson Schleudergiessen von superlegierungen auf nickelbasis mit verbesserter oberflächenqualität, konstruktiver stabilität und verbesserten mechanischen eigenschaften in isotropen graphitmodulen unter vakuum
US6755239B2 (en) 2001-06-11 2004-06-29 Santoku America, Inc. Centrifugal casting of titanium alloys with improved surface quality, structural integrity and mechanical properties in isotropic graphite molds under vacuum
US6799627B2 (en) 2002-06-10 2004-10-05 Santoku America, Inc. Castings of metallic alloys with improved surface quality, structural integrity and mechanical properties fabricated in titanium carbide coated graphite molds under vacuum
US6986381B2 (en) * 2003-07-23 2006-01-17 Santoku America, Inc. Castings of metallic alloys with improved surface quality, structural integrity and mechanical properties fabricated in refractory metals and refractory metal carbides coated graphite molds under vacuum
JP6139224B2 (ja) * 2013-04-04 2017-05-31 株式会社東芝 高強度薄肉伝熱管ならびにその製造方法および伝熱管製造装置
CN110695282A (zh) * 2019-10-22 2020-01-17 成都先进金属材料产业技术研究院有限公司 Gh3128合金棒材制备方法
CN110802189B (zh) * 2019-11-12 2021-06-01 中航上大高温合金材料有限公司 一种难变形高温合金板坯锻造工艺

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519503A (en) * 1967-12-22 1970-07-07 United Aircraft Corp Fabrication method for the high temperature alloys
US3677830A (en) * 1970-02-26 1972-07-18 United Aircraft Corp Processing of the precipitation hardening nickel-base superalloys
US3975219A (en) * 1975-09-02 1976-08-17 United Technologies Corporation Thermomechanical treatment for nickel base superalloys
ATE6674T1 (de) * 1980-08-08 1984-03-15 Bbc Aktiengesellschaft Brown, Boveri & Cie. Verfahren zur herstellung eines werkstueckes aus einer warmfesten legierung.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105499477A (zh) * 2016-03-04 2016-04-20 大连大高阀门股份有限公司 核一级爆破阀剪切帽锻造工艺
CN105499477B (zh) * 2016-03-04 2017-10-24 大连大高阀门股份有限公司 核一级爆破阀剪切帽锻造工艺

Also Published As

Publication number Publication date
CH661455A5 (de) 1987-07-31
DE3371229D1 (en) 1987-06-04
EP0087183A1 (fr) 1983-08-31
US4453985A (en) 1984-06-12
JPS58151458A (ja) 1983-09-08

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