EP2406406B1 - Alliage de laiton sans plomb - Google Patents

Alliage de laiton sans plomb Download PDF

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Publication number
EP2406406B1
EP2406406B1 EP09841636.5A EP09841636A EP2406406B1 EP 2406406 B1 EP2406406 B1 EP 2406406B1 EP 09841636 A EP09841636 A EP 09841636A EP 2406406 B1 EP2406406 B1 EP 2406406B1
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EP
European Patent Office
Prior art keywords
alloy
lead
less
alloys
tellurium
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.)
Active
Application number
EP09841636.5A
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German (de)
English (en)
Other versions
EP2406406A4 (fr
EP2406406A1 (fr
Inventor
Norman Michael Lazarus
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.)
Aviva Metals Inc
Original Assignee
National Bronze and Metals Inc
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 National Bronze and Metals Inc filed Critical National Bronze and Metals Inc
Priority to PL09841636T priority Critical patent/PL2406406T3/pl
Publication of EP2406406A1 publication Critical patent/EP2406406A1/fr
Publication of EP2406406A4 publication Critical patent/EP2406406A4/fr
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    • 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
    • C22C9/04—Alloys based on copper with zinc as the next major constituent

Definitions

  • the present invention relates to brass compositions with extremely low to no lead content.
  • the compositions exhibit good machinability and strength similar to that of conventional leaded brass alloy free machining brass.
  • the lead phase in copper lead alloys can be affected by corrosive attacks with hot organic or mineral oil.
  • hot organic or mineral oil For example, when temperature of such an alloy rises, it has been known that the oil can break down to form peroxides and organic gases which effect a degree of leaching on the lead phase within the alloy. If this leaching progresses to any appreciable extent, the component, if it is a bearing or structural component, may eventually malfunction or fail.
  • the present invention relates to a brass alloy consisting of: copper, from 2% to less than 15% zinc, from 0.4% to 1.0% tellurium, less than 0.25% lead, and optionally less than 0.02% phosphorus.
  • the alloy typically has a lead content of from less than 0.025% to less than 0.001% which is considered “lead-free.”
  • the alloy exhibits excellent machinability and conductivity. Depending on the composition of the alloy, the tensile strength will vary between 240 MPa and 530 MPa and yield strength will vary from 200 to 450 MPa. Conductivity will range from 28% to 49% IACS.
  • the machinability of the novel alloy of the invention is similar to that for lead containing compositions. This eliminates or reduces the amount of retooling needed to use the novel alloys to produce finished products such as plumbing fixtures.
  • the brass alloys of the present invention are prepared by first melting copper at a temperature of about 1050°C. Zinc and tellurium are then added to the molten copper. Brass alloy is then cast into billets utilizing horizontal or vertical casting methods.
  • the copper used to make the alloys is typically copper cathode or high grade uncontaminated and pure copper scrap comprising 99.95% minimum copper and to .05% impurities.
  • Lead is a typical impurity, comprising less than 0.025% of the copper used.
  • Zinc is the next major component comprising from 2% to less than 15% of the alloy.
  • Tellurium is used as a replacement for lead. Like lead, tellurium is added to improve machinability of the alloy without the negative contribution of lead. Tellurium is added in an amount ranging from 0.4% to 1.0%. In one embodiment, tellurium comprises about .5% of the alloy. The amount of tellurium used will depend, in part, on the amount of copper used in the alloy, as copper levels increase the amount of tellurium used with decrease. Like lead, the addition of tellurium to the alloy creates discontinuities in the copper and zinc phases of the alloy like those shown in Figs 1-3 . The good dispersion of these discontinuities leads to the improved machinability of the alloys.
  • One advantage of the present invention is that the alloys exhibit machinability similar to that of lead containing alloys while using significantly lower amounts of tellurium.
  • phosphorous When phosphorous is used, the amount present will typically be less than 0.02% of the alloy.
  • the resulting alloys will generally exhibit excellent machinability and conductivity as indicated by Ultimate Tensile Strength (UTS) ranging from 240 to 530 MPa and a yield strength of from 200 MPa to 450 MPa as determined using ASTM method B140.
  • UTS Ultimate Tensile Strength
  • the actual Tensile strength and Yield strength will depend, in part, on the actual composition of the alloy.
  • Conductivity of the alloys will range from 28 to 45% IACS.
  • the billets were then changed into an extrusion press at a temperature ranging from about 780°C to about 860°C.
  • the billets were then hot extruded through a variety of dies and at different pressures to produce numerous sizes. Each shot was lubricated prior to extrusion and the extrusion dies were preheated. The results are shown in Table 2.
  • Conductivity tests were then conducted on various samples. Conductivity diminishes as the ratio of zinc content increases. The results ranged from at least about 28% to about 49% maximum.
  • FIGS 1-3 Photomicrographs of Samples C1, C2 and C3 were taken after draw and are shown in FIGS 1-3 .
  • the micro structure in the alloys were uniform indicating good dispersion of the tellurium throughout the alloy.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Conductive Materials (AREA)
  • Contacts (AREA)
  • Adornments (AREA)

Claims (6)

  1. Alliage de laiton composé de :
    cuivre ;
    de 2 % à moins de 15 % de zinc ;
    de 0,4 % à 1,0 % de tellure ;
    moins de 0,25 % de plomb ; et
    éventuellement moins de 0,02 % de phosphore.
  2. Alliage selon la revendication 1 ayant une teneur en plomb inférieure à 0,025 %.
  3. Alliage selon la revendication 1 ayant une teneur en plomb inférieure à 0,001 %.
  4. Alliage selon la revendication 1 ayant une résistance à la traction allant de 240 MPa à 530 MPa.
  5. Alliage selon la revendication 1 ayant une limite d'élasticité allant de 200 MPa à 450 MPa.
  6. Alliage selon la revendication 1 ayant une conductivité allant de 28 % à 49 % IACS.
EP09841636.5A 2009-03-09 2009-08-12 Alliage de laiton sans plomb Active EP2406406B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09841636T PL2406406T3 (pl) 2009-03-09 2009-08-12 Bezołowiowy stop mosiężny

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/400,283 US20100226815A1 (en) 2009-03-09 2009-03-09 Lead-Free Brass Alloy
PCT/US2009/053505 WO2010104527A1 (fr) 2009-03-09 2009-08-12 Alliage de laiton sans plomb

Publications (3)

Publication Number Publication Date
EP2406406A1 EP2406406A1 (fr) 2012-01-18
EP2406406A4 EP2406406A4 (fr) 2015-09-02
EP2406406B1 true EP2406406B1 (fr) 2017-11-22

Family

ID=42678418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09841636.5A Active EP2406406B1 (fr) 2009-03-09 2009-08-12 Alliage de laiton sans plomb

Country Status (17)

Country Link
US (3) US20100226815A1 (fr)
EP (1) EP2406406B1 (fr)
JP (1) JP2012519781A (fr)
KR (1) KR20110131272A (fr)
CN (1) CN102414337A (fr)
AU (1) AU2009341842A1 (fr)
BR (1) BRPI0924388B1 (fr)
CA (1) CA2754813A1 (fr)
CO (1) CO6450681A2 (fr)
ES (1) ES2655893T3 (fr)
IL (1) IL215077A0 (fr)
MX (1) MX2011009526A (fr)
PL (1) PL2406406T3 (fr)
RU (1) RU2011140852A (fr)
SG (1) SG174312A1 (fr)
WO (1) WO2010104527A1 (fr)
ZA (1) ZA201106652B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109266900A (zh) * 2018-12-07 2019-01-25 宁波艾维洁具有限公司 一种无铅耐腐蚀的抗脱锌黄铜合金及其制备方法
US11427891B2 (en) 2019-07-24 2022-08-30 Nibco Inc. Low silicon copper alloy piping components and articles

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2027807A (en) * 1932-05-13 1936-01-14 Chase Companies Inc Copper base alloy
US2102388A (en) * 1933-09-21 1937-12-14 American Brass Co Copper-sulphur alloy
JPS6274037A (ja) * 1985-09-26 1987-04-04 Furukawa Electric Co Ltd:The 高力高導電性銅合金
JPH03170646A (ja) * 1989-11-28 1991-07-24 Nippon Mining Co Ltd 結晶粒が微細でかつ低強度な銅合金の製造方法
JPH03193849A (ja) * 1989-12-22 1991-08-23 Nippon Mining Co Ltd 結晶粒が微細でかつ低強度な銅合金及びその製造方法
EP0518903B1 (fr) 1990-03-06 1997-07-16 United States Bronze Powders Incorporated Ameliorations concernant les compostions pour la metallurgie des poudres
JPH04128332A (ja) * 1990-09-18 1992-04-28 Sumitomo Metal Mining Co Ltd Ｔｅが添加された耐腐食性に優れる黄銅
GB9101828D0 (en) 1991-01-29 1991-03-13 Us Bronze Powders Inc Improvements in and relating to brass compositions
US5137685B1 (en) * 1991-03-01 1995-09-26 Olin Corp Machinable copper alloys having reduced lead content
JP3418301B2 (ja) * 1997-01-09 2003-06-23 古河電気工業株式会社 打抜加工性に優れた電気電子機器用銅合金
US6413330B1 (en) * 1998-10-12 2002-07-02 Sambo Copper Alloy Co., Ltd. Lead-free free-cutting copper alloys
US6471792B1 (en) * 1998-11-16 2002-10-29 Olin Corporation Stress relaxation resistant brass
JP4729680B2 (ja) * 2000-12-18 2011-07-20 Ｄｏｗａメタルテック株式会社 プレス打ち抜き性に優れた銅基合金
EP1731624A4 (fr) * 2004-03-12 2007-06-13 Sumitomo Metal Ind Alliage de cuivre et m thode de production de celui-ci
CN1563449A (zh) * 2004-04-07 2005-01-12 四川鑫炬矿业资源开发股份有限公司 一种高塑性、优质锻造的环保型碲黄铜合金材料
EP1777305B1 (fr) * 2004-08-10 2010-09-22 Mitsubishi Shindoh Co., Ltd. Moulage d'alliage de cuivre avec des granules de cristal raffiné
DE502005009545D1 (de) * 2004-10-11 2010-06-17 Diehl Metall Stiftung & Co Kg Kupfer-zink-silizium-legierung, deren verwendung und deren herstellung
JP5116976B2 (ja) * 2006-02-10 2013-01-09 三菱伸銅株式会社 半融合金鋳造用原料黄銅合金

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20170145544A1 (en) 2017-05-25
CA2754813A1 (fr) 2010-09-16
BRPI0924388A2 (pt) 2017-06-06
RU2011140852A (ru) 2013-04-20
AU2009341842A1 (en) 2011-10-06
CN102414337A (zh) 2012-04-11
ZA201106652B (en) 2012-05-30
SG174312A1 (en) 2011-10-28
US20100226815A1 (en) 2010-09-09
IL215077A0 (en) 2011-12-01
US20230151457A1 (en) 2023-05-18
EP2406406A4 (fr) 2015-09-02
EP2406406A1 (fr) 2012-01-18
WO2010104527A1 (fr) 2010-09-16
MX2011009526A (es) 2011-12-16
ES2655893T3 (es) 2018-02-22
JP2012519781A (ja) 2012-08-30
KR20110131272A (ko) 2011-12-06
BRPI0924388B1 (pt) 2021-05-04
PL2406406T3 (pl) 2018-05-30
CO6450681A2 (es) 2012-05-31

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