EP0018818A1 - Precipitation hardening copper alloys - Google Patents

Precipitation hardening copper alloys Download PDF

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Publication number
EP0018818A1
EP0018818A1 EP80301407A EP80301407A EP0018818A1 EP 0018818 A1 EP0018818 A1 EP 0018818A1 EP 80301407 A EP80301407 A EP 80301407A EP 80301407 A EP80301407 A EP 80301407A EP 0018818 A1 EP0018818 A1 EP 0018818A1
Authority
EP
European Patent Office
Prior art keywords
copper alloy
alloys
precipitation hardenable
chromium
copper
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.)
Withdrawn
Application number
EP80301407A
Other languages
German (de)
English (en)
French (fr)
Inventor
Richard Allen Burkett
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.)
Enfield Rolling Mills Ltd
Original Assignee
Enfield Rolling Mills 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
Application filed by Enfield Rolling Mills Ltd filed Critical Enfield Rolling Mills Ltd
Publication of EP0018818A1 publication Critical patent/EP0018818A1/en
Withdrawn legal-status Critical Current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
    • C22C9/00—Alloys based on copper
    • C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent

Definitions

  • This invention relates to precipitation and . dispersion hardening copper alloys and more particularly to precipitation hardening copper alloys that combine good mechanical and electrical properties.
  • copper alloys are not susceptible to improvement in hardness and strength by heat treatment processes.
  • One useful exception to this is the copper-beryllium alloys which are precipitation or age hardenable. These copper alloys, typically containing between 1 and 2% beryllium, are useful because of their non magnetic properties, good electrical-conductivity, high tensile strength, high degree of hardness, and their ability to be cast, wrought, forged or drawn. 'Because of these properties they find utility in the manufacture of various 'types of scientific instruments, electrical contact points, coil springs, non magnetic cutting tools and the like.
  • Copper beryllium alloys have useful mechanical and electrical properties, their cost is comparatively high due to the scarceness of beryllium in the earth's crust. Of even greater concern, however is that it is now recognized that beryllium is an extremely toxic material and is a hazardous carcinogen. This makes it difficult to process copper beryllium alloys with conventional techniques without creating danger to the health of workers and without violating exposure standards as set by various governmental health organisations. Copper-beryllium alloys present a health hazard not only at the time of manufacturing the alloy, but also in subsequent operations which give rise to air borne metallic oxide dust particles.
  • copper base alloys also tend to be deficient in certain respects.
  • brasses, phosphor bronzes, nickel silvers and most copper alloys obtain their property increases through cold working, which decreases formability in proportion to the amount of cold work.
  • Other dispersion hardening alloys have insufficient electrical conductivity to be useful in electrical applications.
  • This invention provides a beryllium-free precipitation hardenable copper alloy that has mechanical and electrical properties similar to those ordinarily only obtained with copper-beryilium alloys.
  • the copper alloys of the invention combine useful properties of tensile strength, yield strength, hardness, formability, corrosion resistance and resistance to fatigue, and electrical conductivity.
  • a copper-nickel alloy includes minor quantities of silicon, chromium and aluminum.
  • nickel is required and the practical upper limit from the standpoint of electrical conductivity is 9%.
  • the silicon, chromium and aluminum are all essential, at least in small amounts, of from 0.05% to 2%. Within these limits, a large number of alloys can be made. No specific percentages can be given as ideal since, as is so often the case, an increase or decrease in a particular component is a trade off of one desirable property for another and the exact formulation selected will depend on the end use requirements.
  • the total amount of silicon, aluminum and chromium however, preferably does not exceed 2%.
  • a typically useful alloy with a good average range of properties comprises 4.5% nickel, 0.5 to 0.7% aluminum and silicon and 0.25% chromium. It may also be desirable to add trace amounts (i.e. up to 0.01%) of incidental elements such as lithium, boron or phosphorous for deoxidizing or fluidity purposes.
  • the alloys of this invention have a very complex structure of the various pseudo-binary systems with copper as the base component and the other elements combined in various combinations as the other phases.
  • the alloy has increased solubility at elevated temperatures and this alpha state can be maintained by rapidly quenching to room temperature, thereby creating an unstable, super saturated condition that only requires the proper temperature to precipitate the hardening phases.
  • the alloys of this invention are readily hardenable, which is a time/temperature related function. For example, maximum hardness can be obtained in less than 2 hours if the alloys are heated to about 400 C., but, this time can be reduced to only about 15 seconds at a temperature of about 750° C .
  • Table I shows typical property values of the alloys according to the invention.
  • alloys having the constitution shown in Table II were made in accordance with this invention using standard techniques.
  • Table III shows the variation in properties obtained for the alloys of Table II. The property data listed was obtained after heat ageing at 450°C for the times shown.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Conductive Materials (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Dental Preparations (AREA)
EP80301407A 1979-04-30 1980-04-29 Precipitation hardening copper alloys Withdrawn EP0018818A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3429179A 1979-04-30 1979-04-30
US34291 1979-04-30

Publications (1)

Publication Number Publication Date
EP0018818A1 true EP0018818A1 (en) 1980-11-12

Family

ID=21875486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80301407A Withdrawn EP0018818A1 (en) 1979-04-30 1980-04-29 Precipitation hardening copper alloys

Country Status (8)

Country Link
EP (1) EP0018818A1 (enrdf_load_stackoverflow)
JP (1) JPS55158246A (enrdf_load_stackoverflow)
AU (1) AU521823B2 (enrdf_load_stackoverflow)
DK (1) DK186080A (enrdf_load_stackoverflow)
GB (1) GB2051127B (enrdf_load_stackoverflow)
IE (1) IE49710B1 (enrdf_load_stackoverflow)
NO (1) NO154019C (enrdf_load_stackoverflow)
ZA (1) ZA802595B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0436364A1 (en) * 1989-12-26 1991-07-10 Ampco Metal Manufacturing Inc. Improved copper-nickel-silicon-chromium alloy
EP0552479A1 (de) * 1992-01-17 1993-07-28 Wieland-Werke Ag Verfahren zur Verbesserung der Biegewechselfestigkeit von Halbzeug aus Kupferlegierungen
US7182823B2 (en) 2002-07-05 2007-02-27 Olin Corporation Copper alloy containing cobalt, nickel and silicon
CN101984108A (zh) * 2010-12-03 2011-03-09 中南大学 超高强、高抗应力松弛CuNiSiAl系弹性铜合金
CN103261460A (zh) * 2010-12-13 2013-08-21 日本精线株式会社 铜合金线及铜合金弹簧

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58124254A (ja) * 1982-01-20 1983-07-23 Nippon Mining Co Ltd 半導体機器のリ−ド材用銅合金
US20130333812A1 (en) * 2010-12-13 2013-12-19 Tohoku Techno Arch Co., Ltd. Copper alloy and process for producing copper alloy
JP6802689B2 (ja) * 2016-11-11 2020-12-16 三芳合金工業株式会社 析出硬化型銅合金及びその製造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851353A (en) * 1953-07-15 1958-09-09 Ibm Copper-base alloys
GB1161610A (en) * 1966-12-29 1969-08-13 Langley Alloys Ltd Improvements in Copper-Nickel-Silicon Alloys
DE1558474A1 (de) * 1967-03-01 1970-03-19 Dies Dr Ing Kurt Kupferlegierung und Verfahren zu ihrer Herstellung
GB1408343A (en) * 1973-03-02 1975-10-01 Gni I Pi Splavov I Alloy based on copper
GB1422215A (en) * 1973-03-02 1976-01-21 Gni I Pi Spalavov I Obrabotki Copper-based alloy

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851353A (en) * 1953-07-15 1958-09-09 Ibm Copper-base alloys
GB1161610A (en) * 1966-12-29 1969-08-13 Langley Alloys Ltd Improvements in Copper-Nickel-Silicon Alloys
DE1558474A1 (de) * 1967-03-01 1970-03-19 Dies Dr Ing Kurt Kupferlegierung und Verfahren zu ihrer Herstellung
GB1408343A (en) * 1973-03-02 1975-10-01 Gni I Pi Splavov I Alloy based on copper
GB1422215A (en) * 1973-03-02 1976-01-21 Gni I Pi Spalavov I Obrabotki Copper-based alloy

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0436364A1 (en) * 1989-12-26 1991-07-10 Ampco Metal Manufacturing Inc. Improved copper-nickel-silicon-chromium alloy
EP0552479A1 (de) * 1992-01-17 1993-07-28 Wieland-Werke Ag Verfahren zur Verbesserung der Biegewechselfestigkeit von Halbzeug aus Kupferlegierungen
US7182823B2 (en) 2002-07-05 2007-02-27 Olin Corporation Copper alloy containing cobalt, nickel and silicon
US8257515B2 (en) 2002-07-05 2012-09-04 Gbc Metals, Llc Copper alloy containing cobalt, nickel and silicon
US8430979B2 (en) 2002-07-05 2013-04-30 Gbc Metals, Llc Copper alloy containing cobalt, nickel and silicon
CN101984108A (zh) * 2010-12-03 2011-03-09 中南大学 超高强、高抗应力松弛CuNiSiAl系弹性铜合金
CN103261460A (zh) * 2010-12-13 2013-08-21 日本精线株式会社 铜合金线及铜合金弹簧
CN103261460B (zh) * 2010-12-13 2015-11-25 日本精线株式会社 铜合金线及铜合金弹簧

Also Published As

Publication number Publication date
GB2051127A (en) 1981-01-14
NO801272L (no) 1980-10-31
AU5793080A (en) 1980-11-06
AU521823B2 (en) 1982-04-29
NO154019C (no) 1986-07-02
ZA802595B (en) 1981-04-29
IE49710B1 (en) 1985-11-27
GB2051127B (en) 1983-01-26
JPS55158246A (en) 1980-12-09
DK186080A (da) 1980-10-31
IE800880L (en) 1980-10-30
NO154019B (no) 1986-03-24
JPS633938B2 (enrdf_load_stackoverflow) 1988-01-26

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

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Effective date: 19801209

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ENFIELD ROLLING MILLS LIMITED

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18W Application withdrawn

Withdrawal date: 19880516

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Inventor name: BURKETT, RICHARD ALLEN