EP3529389A1 - Kupfer-zink-legierung - Google Patents
Kupfer-zink-legierungInfo
- Publication number
- EP3529389A1 EP3529389A1 EP19701767.6A EP19701767A EP3529389A1 EP 3529389 A1 EP3529389 A1 EP 3529389A1 EP 19701767 A EP19701767 A EP 19701767A EP 3529389 A1 EP3529389 A1 EP 3529389A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- copper
- alloy
- weight
- zinc alloy
- content
- 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.)
- Granted
Links
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910001297 Zn alloy Inorganic materials 0.000 title claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 17
- 239000011701 zinc Substances 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 123
- 239000000956 alloy Substances 0.000 claims description 123
- 239000000047 product Substances 0.000 claims description 45
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000011265 semifinished product Substances 0.000 claims description 3
- 229910001369 Brass Inorganic materials 0.000 description 40
- 239000010951 brass Substances 0.000 description 40
- 239000010949 copper Substances 0.000 description 15
- 229910021332 silicide Inorganic materials 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000008092 positive effect Effects 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 238000000137 annealing Methods 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 238000005482 strain hardening Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 2
- 241001275902 Parabramis pekinensis Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/054—Nanosized particles
-
- 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 invention provides a copper-zinc alloy and a copper-zinc alloy product produced from such an alloy.
- the invention relates to a special brass alloy.
- Special brass alloys are used to produce a wide variety of products.
- a typical application for the use of special brass alloy products are bearing parts, engine and gear parts, such as synchro rings and the like, as well as fittings, especially for drinking water applications.
- Brass alloy products are also used for electrical and refrigeration applications, for example, for the manufacture of connector shoes, contact terminals or the like. In refrigeration applications, the good thermal conductivity of brass alloy products is used.
- These brass alloys have a high copper content due to the well-known good thermal conductivity of copper and are only correspondingly low alloyed.
- Special brass alloys have a significantly lower thermal conductivity.
- a brass alloy should have particularly good electrically conductive properties, the Cu content should be selected to be correspondingly high. However, the electrical conductivity of such a product decreases with increasing zinc content. For this reason, special alloys having good electrical conductivity in the foreground are alloys which have a Zn content of typically not more than 5 to 10% by weight. In addition to the elements copper and zinc, one or more of the following elements are involved in the construction of special brass alloys: Al, Sn, Si, Ni, Fe and / or Pb. Each of these elements has a different influence on the properties of the special brass alloy produced from the alloy.
- a special brass alloy from which special brass alloy products are to be produced for electrical applications, must not only have sufficient electrical conductivity, but, in addition, in order to be able to produce the desired products, they must have good workability and machinability, as well as sufficient strength values. With regard to processability of the alloy, it should be producible with standard processing steps so that the costs of special brass alloy products produced therefrom are not made more expensive by complicated and possibly unusual process control steps.
- This alloy comprises 70-83% by weight of Cu, 1-5% by weight of Si and the other matrix-active elements: 0.01-2% by weight Sn, 0.01-0.3% by weight Fe and or Co, 0.01-0.3% by weight of Ni, 0.01-0.3% by weight of Mn, balance Zn together with unavoidable impurities.
- the alloy may contain up to 0.1% by weight of P and the elements Ag, Al, As, Sb, Mg, Ti and Cr each contain at most 0.5% by weight.
- a copper-zinc alloy as a material for electronic components is known from DE 41 20 499 C1.
- This prior art alloy comprises 74-82.9 wt% Cu, 1-2 wt% Si, 0.1-0.4 wt% Fe, 0.02-0.1 wt% P, 0.1-1.0% by weight of Al, balance Zn together with customary impurities.
- Brass alloys which should have good electrical conductivity, are produced with a high Cn content.
- the alloy according to DE 41 20 499 C1 is one such.
- this prior art brass alloy has a rather high mechanical strength and a high spring bending limit and thus a corresponding modulus of elasticity, resilient connector parts can be produced from this alloy.
- the electrical conductivity is only between 6.0 - 7.0 MS / m.
- the invention is therefore the task of proposing a special brass alloy, which is particularly suitable for the manufacture of electrically conductive components, such as contacts as parts of connectors, which is characterized by improved mechanical properties and an improved electrical conductivity.
- this should have a good machinability and good Kaltumform zucchiniseigenschaften.
- a copper-zinc alloy for the production of electrically conductive components, such as contacts consisting of:
- This copper-zinc alloy is characterized by its special alloy composition.
- the main alloying elements of this alloy are the elements Cu, Zn and Sn. Due to the relatively high Zn content and the correspondingly lower Cu content, it was surprisingly found that, nevertheless, the electrical conductivity meets the requirements imposed on a product made from this alloy and even the conductivity of prior art special brass alloys, which have been used for electrically conductive applications exceeds.
- Si is involved in the alloy at 0.015-0.15 wt%. The Si in the alloy serves to form silicides as fine precipitates in the microstructure. The size of the silicides is typically less than 1 pm on average.
- silicides exceed a certain size, this has a detrimental effect on the polishability, coatability and / or solderability of the surface of the alloy product made of the alloy.
- a higher Si content can not improve the particular properties of the alloy according to the invention. Rather, this could adversely affect the desired good electrical conductivity.
- silicide-forming elements From the group of elements Mn, Fe, Ni and Al as silicide-forming elements, at least two elements are involved in the construction of the alloy. Together with Si, these elements form finely divided mixed silicides which have a positive effect on the abrasion resistance of the product made from the alloy. These silicides are finely distributed particles in the matrix. The proportion of these elements in the structure of the alloy is limited, to max.
- the elements Fe, Ni and Al are preferably involved in the construction of the alloy. Mn can be part of the alloy as a silicide-forming agent.
- the elements Fe, Ni and Al are preferably provided as silicide formers, which typically form mixed silicides. In one embodiment, it is provided that the Ni and Al components are each approximately the same size, while the Fe component is only 40-60% of the Ni or Al component. In a preferred embodiment, the Fe content is about 50% of the Ni or Al content.
- this alloy or an alloy product produced from this alloy has shown that this not only has a particularly fine grain (typically 10-100 pm), but is also very readily extrudable or hotformable, and can be readily cold worked by cold working and has a good machinability and yet has a very good electrical conductivity of more than 12 MS / m (20% IACS) for special brasses of the type in question. This is also confined to the relatively high Sn content with simultaneously limited proportions of the silicide-forming elements.
- brass alloys which should have good machinability must not have a copper content of less than 70% by weight (see, for example, US 2014/0234411 A1).
- the alloy according to the invention or the product produced therefrom is very easy to machine.
- What is of interest for electrical applications of a special brass alloy product made from this alloy is its particular good galvanic coatability.
- such products are coated with a particularly highly conductive metal layer, ie a coating whose electrical conductivity clearly exceeds that of the product made from the brass alloy.
- Such a metal layer is typically applied galvanically.
- this brass alloy can also be used to produce products with resilient properties, such as plug shoes as contacts.
- an E-modulus of more than 100 to 120 GPa this is in the size range of the E-modules, which are known from low-alloyed copper-zinc binary alloys, such as these typically for electrical applications in which it sometimes to be applied spring force, are used.
- this brass alloy can produce alloy products, which have an electrical conductivity of more than 12 MS / m (20% IACS). This achieves electrical conductivity values which are generally higher than for other special brass alloys with a Zn content of 30% by weight or more and which are sufficient for many applications. This is combined with strength values for alloy products made from this alloy, which are otherwise known only from special brass alloys specially designed for this purpose. However, they do not then have the further positive properties of this alloy or of a product produced therefrom.
- a special feature of this copper-zinc alloy is its simple chemical structure due to the small number of elements involved in the construction of the alloy. This also includes that the alloy is Cr-free.
- the alloy is also typically Pb-free, with a Pb content of max. 0.1 wt .-% is allowed. It can not always be avoided that small quantities of Pb are introduced into the alloy as a result of carry-over or the use of recycled material. Within the permitted range, Pb does not adversely affect the above-described positive properties of this copper-zinc alloy. With a maximum permitted content of 0.1% by weight of Pb, this alloy is still considered Pb-free.
- the particularly good machinability of an alloy product produced from this alloy can be specified with an index of 60-70 and in a specific embodiment of more than 80.
- the copper-zinc alloy according to the invention preferably has the following composition:
- Such an alloy is composed as follows:
- the preferred Zn content is between 32 and 36 wt .-%.
- the invention is described below with reference to an exemplary embodiment in comparison to three comparative alloys.
- the alloy according to the invention was prepared from two samples - the samples A and B - in addition to three comparative alloys and extruded.
- the composition of the tested alloys is shown in the following table:
- the comparative alloys are Alloy 1, Alloy 2 and Alloy 3.
- the alloy according to the invention has the following strength values according to Samples A and B:
- the microstructure of the alloy according to the invention has at room temperature predominantly a-phase in the matrix. At hot-stamping temperatures there is a sufficient proportion of ⁇ -phase.
- the grain structure is small at room temperature with a mean grain size of 10 to 100 pm.
- the silicides are finely distributed as fine precipitates that form from the press heat.
- the electrical conductivity can be improved by performing a subsequent annealing step, which is preferably carried out between 380 ° C and 500 ° C for about 3 hours.
- the annealing is carried out at temperatures between 440 ° C and 470 ° C for 3 hours.
- fine precipitates are removed, as these impede the electrical conductivity.
- an electrical conductivity of about 14.2 MS / m was measured on Samples A and B.
- the semifinished products produced therefrom can also be cold formed several times without intermediate annealing, for example stretched or bent, in order to allow the component to achieve particularly high strength values as a result of the cold work hardening that occurs therewith.
- FIGS. 1 to 5 show diagrams from which the mechanical strength properties of the alloy according to the invention are established with reference to sample A with increasing elongation of the sample body. In each case the strain on the starting surface or initial length of the sample body is plotted on the x-axis.
- FIG. 1 shows the development of the 0.2% proof stress of the specimen with increasing elongation, up to a total elongation of 60%.
- the 0.2% proof stress increases with increasing elongation of the specimen.
- the same behavior can be observed in the tensile strength.
- the elongation performed as cold working results in an increase in tensile strength of more than 100% when the specimen has been stretched over 50%.
- An increase in the yield ratio is also observed with increasing elongation of the specimen.
- the elongation at break is of particular interest to the claimed alloy. Despite elongation even in areas of over 50% and thus despite strong deformation, the elongation at break does not fall below a value of 10%
- the hardness increases due to the concomitant cold deformation, namely up to about 180 HB 2.5 / 62.5.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Nanotechnology (AREA)
- Conductive Materials (AREA)
- Contacts (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202018100075.6U DE202018100075U1 (de) | 2018-01-09 | 2018-01-09 | Kupfer-Zink-Legierung |
PCT/EP2019/050005 WO2019137832A1 (de) | 2018-01-09 | 2019-01-02 | Kupfer-zink-legierung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3529389A1 true EP3529389A1 (de) | 2019-08-28 |
EP3529389B1 EP3529389B1 (de) | 2020-03-04 |
Family
ID=65234514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19701767.6A Active EP3529389B1 (de) | 2018-01-09 | 2019-01-02 | Kupfer-zink-legierung |
Country Status (9)
Country | Link |
---|---|
US (1) | US20200370147A1 (de) |
EP (1) | EP3529389B1 (de) |
JP (1) | JP7374904B2 (de) |
KR (1) | KR20200103709A (de) |
CN (1) | CN111788321A (de) |
BR (1) | BR112020012537A2 (de) |
DE (1) | DE202018100075U1 (de) |
ES (1) | ES2780202T3 (de) |
WO (1) | WO2019137832A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102577574B1 (ko) | 2018-10-29 | 2023-09-11 | 오토 푹스 카게 | 특수 황동 합금 및 특수 황동 합금 프로덕트 |
DE102020128955A1 (de) | 2020-11-03 | 2022-05-05 | Aurubis Stolberg Gmbh & Co. Kg | Messinglegierung |
DE102021102120A1 (de) * | 2021-01-29 | 2022-08-04 | HME Brass Germany GmbH | Messinglegierung und Verfahren zum Herstellen eines Halbzeugs aus dieser Messinglegierung |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4205984A (en) * | 1978-06-28 | 1980-06-03 | Olin Corporation | Modified brass alloys with improved stress relaxation resistance |
JPS59153855A (ja) * | 1983-02-17 | 1984-09-01 | Nippon Mining Co Ltd | 耐食性に優れた銅合金 |
JPH01187705A (ja) * | 1988-01-22 | 1989-07-27 | Nippon Mining Co Ltd | 通電材料 |
DE4120499C1 (en) | 1991-06-21 | 1992-11-19 | Wieland-Werke Ag, 7900 Ulm, De | Low cost copper@ alloy for e.g. semiconductor carrier - contains zinc@, silicon, iron@, aluminium@, phosphorus@ and copper@ |
JP4129807B2 (ja) | 1999-10-01 | 2008-08-06 | Dowaホールディングス株式会社 | コネクタ用銅合金およびその製造法 |
DE10158130C1 (de) * | 2001-11-27 | 2003-04-24 | Rehau Ag & Co | Verwendung einer korrosionsbeständigen Kupfer-Zink-Legierung für Trinkwasserformteile |
DE10308779B8 (de) | 2003-02-28 | 2012-07-05 | Wieland-Werke Ag | Bleifreie Kupferlegierung und deren Verwendung |
US20050039827A1 (en) * | 2003-08-20 | 2005-02-24 | Yoshinori Yamagishi | Copper alloy having excellent corrosion cracking resistance and dezincing resistance, and method for producing same |
CN100415911C (zh) * | 2003-08-25 | 2008-09-03 | 同和矿业株式会社 | 优异抗腐裂性和抗脱锌性能的铜合金及其制造方法 |
JP5191725B2 (ja) | 2007-08-13 | 2013-05-08 | Dowaメタルテック株式会社 | Cu−Zn−Sn系銅合金板材およびその製造法並びにコネクタ |
JP5088425B2 (ja) * | 2011-01-13 | 2012-12-05 | 三菱マテリアル株式会社 | 電子・電気機器用銅合金、銅合金薄板および導電部材 |
DE102012002450A1 (de) * | 2011-08-13 | 2013-02-14 | Wieland-Werke Ag | Verwendung einer Kupferlegierung |
JP5876695B2 (ja) | 2011-09-29 | 2016-03-02 | 森下仁丹株式会社 | シームレスカプセルおよびその製造方法 |
JP5507635B2 (ja) | 2012-09-05 | 2014-05-28 | Dowaメタルテック株式会社 | 銅合金板材およびその製造方法 |
CN105779811B (zh) * | 2014-12-22 | 2018-10-09 | 百路达(厦门)工业有限公司 | 一种成型性能优异的环保黄铜合金及其制造方法 |
JP6576079B2 (ja) * | 2015-04-01 | 2019-09-18 | Dowaメタルテック株式会社 | 低Pb黄銅棒材およびその製造方法 |
DE202017103901U1 (de) | 2017-06-30 | 2017-07-17 | Otto Fuchs - Kommanditgesellschaft - | Sondermessinglegierung sowie Sondermessinglegierungsprodukt |
-
2018
- 2018-01-09 DE DE202018100075.6U patent/DE202018100075U1/de active Active
-
2019
- 2019-01-02 CN CN201980007349.9A patent/CN111788321A/zh active Pending
- 2019-01-02 WO PCT/EP2019/050005 patent/WO2019137832A1/de unknown
- 2019-01-02 JP JP2020537635A patent/JP7374904B2/ja active Active
- 2019-01-02 EP EP19701767.6A patent/EP3529389B1/de active Active
- 2019-01-02 BR BR112020012537-7A patent/BR112020012537A2/pt not_active Application Discontinuation
- 2019-01-02 KR KR1020207019688A patent/KR20200103709A/ko not_active Application Discontinuation
- 2019-01-02 ES ES19701767T patent/ES2780202T3/es active Active
- 2019-01-02 US US16/768,368 patent/US20200370147A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
ES2780202T3 (es) | 2020-08-24 |
EP3529389B1 (de) | 2020-03-04 |
DE202018100075U1 (de) | 2019-04-10 |
JP2021509934A (ja) | 2021-04-08 |
US20200370147A1 (en) | 2020-11-26 |
RU2020115663A3 (de) | 2022-02-17 |
CN111788321A (zh) | 2020-10-16 |
JP7374904B2 (ja) | 2023-11-07 |
BR112020012537A2 (pt) | 2020-11-24 |
WO2019137832A1 (de) | 2019-07-18 |
KR20200103709A (ko) | 2020-09-02 |
RU2020115663A (ru) | 2022-02-10 |
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