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WO1989008725A1 - Alliage de laiton et procede de fabrication et utilisation d'un tel alliage - Google Patents

Alliage de laiton et procede de fabrication et utilisation d'un tel alliage Download PDF

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Publication number
WO1989008725A1
WO1989008725A1 PCT/SE1989/000125 SE8900125W WO8908725A1 WO 1989008725 A1 WO1989008725 A1 WO 1989008725A1 SE 8900125 W SE8900125 W SE 8900125W WO 8908725 A1 WO8908725 A1 WO 8908725A1
Authority
WO
WIPO (PCT)
Prior art keywords
brass
alloy
brass alloy
composition
alloy according
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.)
Ceased
Application number
PCT/SE1989/000125
Other languages
English (en)
Inventor
Johan KRÄMER
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.)
Tour and Andersson AB
Original Assignee
Tour and Andersson AB
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 Tour and Andersson AB filed Critical Tour and Andersson AB
Publication of WO1989008725A1 publication Critical patent/WO1989008725A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C22C9/04—Alloys based on copper with zinc as the next major constituent

Definitions

  • the present invention relates to a brass alloy according to the preamble of patent claim 1. Furthermore, it relates to a method for the preparation of such a brass alloy according to the preamble of the first method claim as well as a use of said brass alloy.
  • Brass exists in two technically interesting main forms, ⁇ -brass containing more than 62 % Cu and (Y + ⁇ , -brass containing 54-62 % Cu.
  • 0 + p -brass is located at 64.5 % Cu at the point of solidification of the alloy and at 62 % Cu at lower tempe ⁇ ratures.
  • a slow cooling or a special heat treatment it is possible, if the precentage is above 62 % Cu, to recrys- tallize all the metal to the ⁇ -phase.
  • the 0 ⁇ -phase has a face-centered cubic structure, while the ⁇ -phase has a body-centered cubic structure.
  • Such alloy metals are i.a. Sn, Pb, Fe, Ni, Mn, Si and Al, which may be included in various types of special brass.
  • the corrosion resistance of brass is reduced when the zinc content increases.
  • This de ⁇ terioration may in certain cases manifest itself as a se ⁇ lective elimination or corrosion of the zinc, a so called dezincification.
  • Said inhibitors may be plain or combined, e.g. P, As, Sb, Bi and/or Si.
  • the C -phase is the only phase which can be inhibited by means of said elements. (b -brass and the f ⁇ -phase of a t* I -mix ⁇ ture are attacked firstly, since they are less electro ⁇ positive than the (X -phase.
  • brass can be subjected to other types of corrosion, such as stress corrosion and intergranular corrosion. Agents which prevent one type of corrosion are not always effective against other types of corrosion.
  • Si does not display any particular negative characteristics and also results in stress corrosion resistance.
  • the percentages of Cu, Mn, Pb, Si, As and Zn are those percentages, which were regarded as fixing the characte ⁇ ristics of the prepared alloy.
  • the percentages of the re ⁇ maining elements Al, Fe, Ni, Sb, and Sn were values for a maximum admixture without any disturbing secondary effects.
  • said elements were fundamentally undesirable impuri ⁇ ties, which however could be put up with if present in the above-stated limited amount.
  • the reason why said elements existed inApplicant's previous alloy is that brass to a great extent is made of brass scrap having a varying and partly unknown composition. By putting up with or tolera ⁇ ting more elevated impurity contents less expensive raw materials (scrap) could be used and consequently a re ⁇ Jerusalem cost of production be attained.
  • Said previous alloy could solely be used when die-casting.
  • By admixing lead it obtained excellent characteristics when machined in cutting processes. It displayed an ex ⁇ cellent stress corrosion resistance as well as a satis ⁇ factory but limited dezincification resistance. However, it displayed an intergranular corrosion in a sulphate- containing water.
  • An additional purpose was to obtain a more generally use ⁇ ful brass- alloy, which can be not only die-casted but als chilled, extruded to bars, tubes and profiles as well as warm-pressed. Additional desirable characteristics were satisfactory cold forming characteristics as well as main ⁇ tained sat sfactory characteristics when subjected to cut ting operations.
  • Brass having the lower Cu-content is solely dezincificati resistant subsequent to a heat-treatment.
  • the Cu-percen- tage ought to be larger than 62.5 % also when a heat-trea ment is used.
  • US 2 007 008 relates to an alloy having the following composi ⁇ tion: 61 % Cu, 0.4-0.8 % Si, 0.2-0.4 % Fe, the rest zinc. '
  • this alloy inevitably contains a certain amount of -phase and consequently is not dezincification re ⁇ sistant.
  • DE 2 353 238 relates to an alloy having 95-63 % Cu, 0.04- 0.25 % P, 0.07-0.7 % Fe and the rest Zn. Also, as much as 0.1 %, preferably 0.020-0.035 % As, can be added. As has been mentioned above, the phosphorus admixture yields a too hard product as far as many applications are concerned and there is a danger of smelting problems when a P-content is to be adjusted. An As-content results in an intergranu ⁇ lar corrosion.
  • the alloy according to the present invention may contain as much as 0.05 % Al, 0.8 %, preferably 0.5 %, Sn, 0.04 % P, 0.02 % Bi and 0.05 % Sb without a deterioration as regards the corrosion re ⁇ sistance and/or other characteristics of the alloy.
  • a sulphate- containing water merely traces of As ought to exist, say 0-0.020 % As, while in case this risk is smaller as much as 0.020 % As can be tolerated.
  • Supp ⁇ liers of brass from smelting plants do not warrant smaller amounts than 0.020 % As.
  • An admixture of As of up to 0.020 % is regarded as an As-free material according to existing regulations.
  • An additional purpose of the invention is to propose a method of producing a brass alloy of the type mentioned above, which enables one to use cheap brass scrap as a raw material.
  • Fe By admixing Fe as a master alloy, in which Fe as well as Cu are cubicly face-centered, Fe will mainly be evenly dist ⁇ ricited as finely divided Fe-atoms in the matrix of the ma ⁇ terial.
  • Fe is added as Fe-metal, the iron will ea ⁇ gerly combine with e.g. Si, B, Al and P in the melt and form intermetallic inclusions with them.
  • the corrosion-inhibiting elements are combined and consequent ⁇ ly they can no longer contribute to an increase in the cor ⁇ rosion resistance.
  • coarse, hard inclusions of this kind impair the cuttability due to the tool wear.
  • the alloy was moderately resistant to a dezincification.
  • An alloy with the following composition was prepared: 64.9 % Cu, 32.3 % Zn, 1.7 % Pb, 0.033 % As, 0.54 % Si, 0.054 % Fe, 0.36 % Ni and 0.05 % Sn.
  • This alloy has a satisfactory dezincification resistance, intergranular corrosion resistance and stress resistance. It is suitable for die-casting, extrusion, chill casting as well as warm-pressing.
  • Fe is to be added in the form of a ferro-copper alloy
  • the bars and the tubes respectively are pressed, heat-trea- ted at 550 + 25°C for 2 h, hard-drawn and reeled. It is easy to handle the bar products in a cutting operation and they have a satisfactory dezincification resistance, stress corrosion resistance as well as intergranular corrosion resistance.
  • This alloy has a satisfactory dezincification resistance, stress corrosion resistance and intergranular corrosion resistance and it is easy to handle it in a cutting ope ⁇ ration.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)
  • Extrusion Of Metal (AREA)

Abstract

L'alliage de laiton décrit a la composition suivante: 63,5 à 66,5 % de Cu+Ni, 0 à 0,8 % de Ni, 0,5 à 3,0 % de Pb, O,3 à 1,0 % de Si, de préférence 0,65 à 0,80 % de Si, et 0,07 à 0,80 % de Fe, de préférence 0,10 à 0,50 % de Fe, le reste étant essentiellement composé de Zn. Un tel alliage est résistant à la dézincification, à la corrosion sous tension et à la corrosion intergranulaire. Il peut être formé par moulage par injection, par moulage en coquille, par estampage à chaud et par forgeage à chaud. La présente invention décrit également un alliage ayant une composition plus limitée, 64,5 à 65,5 % de Cu+Ni, 0 à 0,8 % de Ni, 1,5 à 2,2 % de Pb, 0,65 à 0,80 % de Si et 0,10 à 0,20 de Fe, le reste étant essentiellement du Zn, qui peut être extrudé sous forme de barres, de tubes et de sections profilées. Lorsque l'alliage est fondu, il est possible que des additions de Fe soient nécessaires sous la forme d'un alliage de ferrocuivre.
PCT/SE1989/000125 1988-03-16 1989-03-13 Alliage de laiton et procede de fabrication et utilisation d'un tel alliage Ceased WO1989008725A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8800931-1 1988-03-16
SE8800931A SE8800931D0 (sv) 1988-03-16 1988-03-16 Messingslegering och sett att framstella densamma

Publications (1)

Publication Number Publication Date
WO1989008725A1 true WO1989008725A1 (fr) 1989-09-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1989/000125 Ceased WO1989008725A1 (fr) 1988-03-16 1989-03-13 Alliage de laiton et procede de fabrication et utilisation d'un tel alliage

Country Status (3)

Country Link
AU (1) AU3437289A (fr)
SE (1) SE8800931D0 (fr)
WO (1) WO1989008725A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0572959A1 (fr) * 1992-06-02 1993-12-08 HETZEL METALLE GmbH Alliage de laiton
US5961749A (en) * 1997-05-30 1999-10-05 Diehl Stiftung & Co. Use of a brass alloy for sanitary pipes
WO2001014606A1 (fr) * 1999-08-26 2001-03-01 Tour & Andersson Hydronics Ab Alliage de laiton de moulage sous pression resistant a la dezincification
EP1273671A1 (fr) * 2001-07-05 2003-01-08 Diehl Metall Stiftung & Co. KG Alliage cuivre-zinc résistant à la dezincification et son procédé de fabrication
EP1598436A4 (fr) * 2002-12-27 2007-08-22 Sumitomo Light Metal Ind Materiau metallique et procede de production de celui-ci
CN105264101A (zh) * 2013-06-05 2016-01-20 三越金属株式会社 铜基合金
CN114318053A (zh) * 2021-12-15 2022-04-12 中船重工西安东仪科工集团有限公司 一种普通黄铜快速熔化方法
CN115261668A (zh) * 2022-06-30 2022-11-01 宁波金田铜业(集团)股份有限公司 一种黄铜合金带材及其制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0768595B2 (ja) * 1991-11-14 1995-07-26 三宝伸銅工業株式会社 耐蝕性銅基合金材

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2007008A (en) * 1934-02-19 1935-07-02 Phelps Dodge Copper Prod Copper zinc alloy containing silicon and iron
DE1458322A1 (de) * 1962-09-19 1968-10-17 Nordiske Kabel Traad Gegen Salzwasser unempfindliche,plastisch verformbare Legierung aus Messing oder Aluminium-Messing
DE2040031A1 (de) * 1969-08-18 1971-03-11 Alcuma Establishment Kupfer-Zinklegierung fuer druckdichte Gussstuecke
DE2353238B1 (de) * 1973-10-24 1975-02-06 Wieland Werke Ag Verwendung einer phosphorhaltigen Messinglegierung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2007008A (en) * 1934-02-19 1935-07-02 Phelps Dodge Copper Prod Copper zinc alloy containing silicon and iron
DE1458322A1 (de) * 1962-09-19 1968-10-17 Nordiske Kabel Traad Gegen Salzwasser unempfindliche,plastisch verformbare Legierung aus Messing oder Aluminium-Messing
DE2040031A1 (de) * 1969-08-18 1971-03-11 Alcuma Establishment Kupfer-Zinklegierung fuer druckdichte Gussstuecke
DE2353238B1 (de) * 1973-10-24 1975-02-06 Wieland Werke Ag Verwendung einer phosphorhaltigen Messinglegierung

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 126, No. C 249; & JP,A,59 118 842, publ. 09-07-84. *
PATENT ABSTRACTS OF JAPAN, Vol. 8, No. 15 (C-206); & JP,A,58 181 839, publ. 24-10-83. *
PATENT ABSTRACTS OF JAPAN, Vol. 8, No. 19(C-207); & JP,A,58 185 738, publ. 29-10-1983. *
PATENT ABSTRACTS OF JAPAN, Vol. 8, No. 236; & JP,A,59 118 840, publ. 09-07-84. *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0572959A1 (fr) * 1992-06-02 1993-12-08 HETZEL METALLE GmbH Alliage de laiton
US5961749A (en) * 1997-05-30 1999-10-05 Diehl Stiftung & Co. Use of a brass alloy for sanitary pipes
US6787101B1 (en) 1999-08-26 2004-09-07 Tour & Andersson Ab Die-casting brass alloy which is resistant to dezincification
WO2001014606A1 (fr) * 1999-08-26 2001-03-01 Tour & Andersson Hydronics Ab Alliage de laiton de moulage sous pression resistant a la dezincification
EP1273671A1 (fr) * 2001-07-05 2003-01-08 Diehl Metall Stiftung & Co. KG Alliage cuivre-zinc résistant à la dezincification et son procédé de fabrication
DE10132055C2 (de) * 2001-07-05 2003-12-11 Diehl Metall Stiftung & Co Kg Entzinkungsbeständige Kupfer-Zink-Legierung sowie Verfahren zu ihrer Herstellung
DE10132055A1 (de) * 2001-07-05 2003-01-23 Diehl Metall Stiftung & Co Kg Entzinkungsbeständige Kupfer-Zink-Legierung sowie Verfahren zu ihrer Herstellung
EP1598436A4 (fr) * 2002-12-27 2007-08-22 Sumitomo Light Metal Ind Materiau metallique et procede de production de celui-ci
CN105264101A (zh) * 2013-06-05 2016-01-20 三越金属株式会社 铜基合金
CN105264101B (zh) * 2013-06-05 2017-11-14 三越金属株式会社 铜基合金
CN114318053A (zh) * 2021-12-15 2022-04-12 中船重工西安东仪科工集团有限公司 一种普通黄铜快速熔化方法
CN114318053B (zh) * 2021-12-15 2022-10-18 中船重工西安东仪科工集团有限公司 一种普通黄铜快速熔化方法
CN115261668A (zh) * 2022-06-30 2022-11-01 宁波金田铜业(集团)股份有限公司 一种黄铜合金带材及其制备方法
CN115261668B (zh) * 2022-06-30 2023-02-28 宁波金田铜业(集团)股份有限公司 一种黄铜合金带材及其制备方法

Also Published As

Publication number Publication date
SE8800931D0 (sv) 1988-03-16
AU3437289A (en) 1989-10-05

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