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EP0282204B1 - Geformter Körper, gebildet aus Kupfer-Beryllium-Legierung und Verfahren zu seiner Herstellung - Google Patents

Geformter Körper, gebildet aus Kupfer-Beryllium-Legierung und Verfahren zu seiner Herstellung Download PDF

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Publication number
EP0282204B1
EP0282204B1 EP88301618A EP88301618A EP0282204B1 EP 0282204 B1 EP0282204 B1 EP 0282204B1 EP 88301618 A EP88301618 A EP 88301618A EP 88301618 A EP88301618 A EP 88301618A EP 0282204 B1 EP0282204 B1 EP 0282204B1
Authority
EP
European Patent Office
Prior art keywords
alloy
formability
rolled sheet
cold rolling
annealing
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
EP88301618A
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English (en)
French (fr)
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EP0282204A1 (de
Inventor
Yosuke Matsui
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.)
NGK Insulators Ltd
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NGK Insulators Ltd
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Filing date
Publication date
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Publication of EP0282204A1 publication Critical patent/EP0282204A1/de
Application granted granted Critical
Publication of EP0282204B1 publication Critical patent/EP0282204B1/de
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
    • 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
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon

Definitions

  • the present invention relates to the manufacture of a shaped body which comprises Be-Cu alloy material.
  • Be-Cu alloy is widely used as an excellent raw material with high mechanical strength and electrical conductivity.
  • a Be-Cu alloy material having a sufficient formability to withstand severe working conditions.
  • the first mode is to subject the rolled sheet of the Be-Cu alloy to a subsequent age hardening, and deliver the material to customers as a so-called mill hardened material.
  • the material is then subjected to various work treatments, including bending into the desired configuration of a parts body in the factory of the customer. In many cases, the shaped parts body so obtained is incorporated into the products as it is.
  • the second mode is to deliver to customers the rolled sheet of the Be-Cu alloy which is then subjected to various work treatments to achieve the desired configuration of a parts body in the factory of the customer, and subsequently to an age hardening in the factory of either the customer or the raw material supplier, to form a complete parts body with a desired strength.
  • the cold rolling to be effected after the solution treatment is a parameter dominantly influential on the characteristics of the material, and is intended to improve the product strength, to prevent the deformation of the material after the aging, and to promote the age precipitation.
  • the material already subjected to the age hardening as a mill hardened material
  • the material with a higher post aging strength has a decreased elongation, an inferior formability and markedly degraded degree of freedom of bending.
  • the preservation of the desired formability of Be-Cu alloy could be achieved only with the sacrifice of the fundamental feature of the alloy, i.e. its excellent high strength.
  • WO 80/01169 describes a process in which a cold rolling following solution treatment is followed by two age-hardening steps at respectively 260-430°C and 480-650°C, prior to straightening and stress relieving.
  • An object of the present invention is to improve the Be-Cu alloy material, with an originally degraded formability as a result of the cold rolling with the reduction of 20% or more, such that the material is capable of withstanding a bending with a smaller radius of curvature during the shaping into the desired configuration of a parts body, and to readily realize the maximum post aging strength of the Be-Cu alloy which has already been shaped into the desired configuration.
  • a solution treatment is carried out with respect to a rolled Be-Cu alloy sheet including 0.2 to 0.8 wt% Be, 0.3 to 4.0 wt% Ni and/or Co, the balance consisting of Cu and unavoidable impurities.
  • This sheet is subjected to a cold rolling with a reduction of 20% or more, and the cold rolled sheet is subjected to an annealing at a temperature of 250 to 550°C to release part of the work strain to recover the formability of the Be-Cu alloy material.
  • the so-obtained material is subjected to necessary work, including bending into a predetermined configuration of the parts body, and then to an aging at a temperature of 350-500°C, thereby to realize the maximum post aging strength.
  • the cold rolling carried out after the solution treatment is followed by an annealing at a predetermined temperature thereby to release part of the work strain and to recover the formability, and the so-obtained Be-Cu alloy material with an improved formability is then shaped into the desired configuration of the final body and subjected to an age hardening, whereby it becomes possible to produce products with a desired high strength.
  • Be-Cu alloy which includes 0.2 to 0.8 wt% Be, 0.3 to 4.0 wt% Ni and/or Co, the balance consisting of Cu and unavoidable impurities.
  • the amount of Be has been defined as ranging from 0.2 to 0.8 wt%.
  • the amount of Ni and/or Co has been defined as ranging from 0.3 to 4.0 wt%.
  • the rolled sheet of Be-Cu alloy with the above-mentioned composition is subjected to a cold rolling, following the solution treatment, with the reduction of 20% or more.
  • a cold rolling following the solution treatment, with the reduction of 20% or more.
  • the present invention defines the temperature range of 250 to 550°C due to the reason that the temperature below 250°C does not result in a sufficient recovery of the formability, on one hand, while the temperature above 550°C results in an excessively aged state whereby a sufficiently high strength cannot be achieved through the age hardening after the shaping into the desired configuration, on the other hand.
  • the present invention defines the temperature range of 350 to 500°C due to the reason that the temperature below 350°C does not induce the precipitation hardening, on one hand, and the temperature above 500°C, though effective to improve the electrical conductivity, results in an excessively aged state whereby a sufficient strength cannot be achieved, on the other hand.
  • R/t value The formability as mentioned in Table 1 and claim 2 hereof has been determined with respect to rolled sheets of Be-Cu alloy prior to the age hardening step, and is expressed as R/t value, where R is a safety bending radius determined by whether or not cracks are formed in the bent portion of the sheet after it has been bent by 180° about an axis in parallel with the rolling direction, and t is the thickness of the sheet by which the safety bending radius is divided.
  • R is a safety bending radius determined by whether or not cracks are formed in the bent portion of the sheet after it has been bent by 180° about an axis in parallel with the rolling direction
  • t the thickness of the sheet by which the safety bending radius is divided.
  • a smaller R/t value indicates that the sheet is capable of withstanding a more severe work conditions including bending with a smaller bending radius.
  • the annealing has been carried out at a higher temperature so that the precipitation nuclei became coarse accompanying decrease in the post aging 0.2% yield strength.
  • the annealing has been carried out under a lower temperature so that is was not possible to achieve a sufficient recovery of the formability after the annealing.
  • the comparative sample (21) exhibits an excessively aged state as a result of aging under a higher temperature, while the comparative sample (22) is in a non-aged state due to the aging treatment under a lower temperature; for both of these samples the post aging 0.2% yield strength has decreased.
  • the cold rolling following the solution treatment is carried out with a higher value such as to improve the post aging strength and to prevent post aging deformations in an effective manner. Also, the degradation of the formability, which has hitherto been considered inevitable, can be prevented positively by the annealing at a predetermined temperature.
  • the solution treatment can be carried out with respect to the sheet of a greater thickness.
  • the solution treatment can be effected with respect to the sheet of 1.0 mm thickness.
  • the shape of the sheet can be properly corrected and also the aging precipitation can be more or less prompted, so that it is possible to prevent undesirable shrinkage arising during the aging after the material has been worked into the configuration of the parts body.

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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)
  • Conductive Materials (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Steel (AREA)

Claims (2)

  1. Verfahren zur Herstellung eines aus einer Be-Cu-Legierung bestehenden Formkörpers mit einer vorbestimmten Konfiguration, wobei das Verfahren das Unterwerfen eines Walzblechs aus Be-Cu-Legierung, die 0,2 bis 0,8 Gew.-% Be, 0,3 bis 4,0 Gew.-% Ni und/oder Co enthält, wobei der Rest aus Cu und unvermeidlichen Verunreinigungen besteht, den folgenden Behandlungsschritten:
    A. Unterwerfen des genannten Walzblechs einer Lösungsbehandlung;
    B. Kaltwalzen des genannten Walzblechs mit einer Reduktion von 20% oder mehr;
    C. Unterwerfen des kaltgewalzten Blechs dem Tempern bei einer Temperatur von 250 bis 550°C, um einen Teil der durch die Verformung hervorgerufenen Spannungen aufzuheben und um die Verformbarkeit wiederzuerlangen, um ein Be-Cu-Legierungsrohmaterial zu bilden;
    D. Bearbeiten, einschließlich Biegen, des so erhaltenen Legierungsrohmaterials, in seinem getemperten Zustand und vor jeglicher Alterungshärtung, zur Erzielung einer vorbestimmten Konfiguration des fertigen Körpers; und
    E. Altern des bearbeiteten Legierungsmaterials bei einer Temperatur von 350 bis 500°C,
    umfaßt.
  2. Verfahren nach Anspruch 1, worin der genannte Temperschritt C so durchgeführt wird, daß das Blech im Verformbarkeitstest eine Verformbarkeit (wie gemäß vorliegender Erfindung definiert) R/t ≦ 5 erreicht, worin R der Biegeradius und t die Dicke des Walzblechs aus Be-Cu-Legierung ist.
EP88301618A 1987-03-12 1988-02-25 Geformter Körper, gebildet aus Kupfer-Beryllium-Legierung und Verfahren zu seiner Herstellung Expired - Lifetime EP0282204B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP55147/87 1987-03-12
JP5514787A JPS63223151A (ja) 1987-03-12 1987-03-12 ベリリウム銅合金材料よりなる部品成形体及びその製造方法

Publications (2)

Publication Number Publication Date
EP0282204A1 EP0282204A1 (de) 1988-09-14
EP0282204B1 true EP0282204B1 (de) 1993-09-22

Family

ID=12990650

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88301618A Expired - Lifetime EP0282204B1 (de) 1987-03-12 1988-02-25 Geformter Körper, gebildet aus Kupfer-Beryllium-Legierung und Verfahren zu seiner Herstellung

Country Status (3)

Country Link
EP (1) EP0282204B1 (de)
JP (1) JPS63223151A (de)
DE (1) DE3884239T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018896B3 (de) * 2006-04-24 2007-12-13 Infineon Technologies Ag Ortsselektive Veränderung der Materialeigenschaft kaltverformter elektrischer Klemmen durch Berücksichtigung der variablen Rekristallisationstemperatur

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0774420B2 (ja) * 1991-02-21 1995-08-09 日本碍子株式会社 ベリリウム銅合金の製造方法
US5486244A (en) * 1992-11-04 1996-01-23 Olin Corporation Process for improving the bend formability of copper alloys
KR100328891B1 (ko) * 1994-01-06 2002-08-21 니뽄 가이시 가부시키가이샤 강도,가공성및내열성이뛰어난베릴륨-구리합금및그의제조방법
US6001196A (en) * 1996-10-28 1999-12-14 Brush Wellman, Inc. Lean, high conductivity, relaxation-resistant beryllium-nickel-copper alloys
EP0854200A1 (de) * 1996-10-28 1998-07-22 BRUSH WELLMAN Inc. Kupfer-Beryllium Legierung
US6129795A (en) * 1997-08-04 2000-10-10 Integran Technologies Inc. Metallurgical method for processing nickel- and iron-based superalloys
JP5480688B2 (ja) * 2010-03-26 2014-04-23 株式会社神戸製鋼所 Ｐｐキャップ用アルミニウム合金板およびその製造方法
EP3208664B1 (de) * 2016-02-19 2023-08-16 Omega SA Uhrwerk oder uhr ohne magnetische signatur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179314A (en) * 1978-12-11 1979-12-18 Kawecki Berylco Industries, Inc. Treatment of beryllium-copper alloy and articles made therefrom
US4394185A (en) * 1982-03-30 1983-07-19 Cabot Berylco, Inc. Processing for copper beryllium alloys
CA1237361A (en) * 1983-11-10 1988-05-31 Brush Wellman Inc. Thermomechanical processing of beryllium-copper alloys
US4579603A (en) * 1985-03-18 1986-04-01 Woodard Dudley H Controlling distortion in processed copper beryllium alloys

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Basis and Industrial Technology for Copper and Copper Alloy, May 25, 1988, Nippon Shindo Kyokai, page 479 *
Materials Science and Technology, Feb. 1986, vol. 2, page 125 *
NGK Metal Review, 11/1981, No. 4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018896B3 (de) * 2006-04-24 2007-12-13 Infineon Technologies Ag Ortsselektive Veränderung der Materialeigenschaft kaltverformter elektrischer Klemmen durch Berücksichtigung der variablen Rekristallisationstemperatur

Also Published As

Publication number Publication date
EP0282204A1 (de) 1988-09-14
JPS63223151A (ja) 1988-09-16
JPH0123526B2 (de) 1989-05-02
DE3884239T2 (de) 1994-03-31
DE3884239D1 (de) 1993-10-28

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