EP0711843B1 - Verwendung einer Kupfer-Zink-Legierung für Trinkwasserinstallationen - Google Patents
Verwendung einer Kupfer-Zink-Legierung für Trinkwasserinstallationen Download PDFInfo
- Publication number
- EP0711843B1 EP0711843B1 EP95116168A EP95116168A EP0711843B1 EP 0711843 B1 EP0711843 B1 EP 0711843B1 EP 95116168 A EP95116168 A EP 95116168A EP 95116168 A EP95116168 A EP 95116168A EP 0711843 B1 EP0711843 B1 EP 0711843B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- copper
- total content
- zinc alloy
- elements
- zinc
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
-
- 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 invention relates to the use of a copper-zinc alloy for drinking water installations, especially for manufacturing of fittings, connectors and other Objects in short or persistent contact with Drinking water.
- EP-OS 0.506.995 describes a machinable copper-zinc alloy with rare earth additives, especially lanthanum, Cerium, praseodymium, neodymium or mixed metal.
- rare earth additives especially lanthanum, Cerium, praseodymium, neodymium or mixed metal.
- As an essential Lead is included in the material up to alloyed to 3.5%, so that the demand for a clear Reduction of the nonchalance can not be met can.
- the invention is therefore based on the object for the above. Propose a copper alloy to use the one Favorable machining behavior for further processing and contains neither lead nor bismuth as components.
- the object is achieved by the use of a Copper-zinc alloy with the composition specified in claim 1 dissolved.
- Dispersoids act in a similar way to lead as a chip breaker, if they exist as discrete particles. you will be already in the form of powders with the appropriate particle size introduced into the melt.
- the dispersoid must a thermally so stable that it is in the casting process does not decompose or melt, on the other hand thermodynamically stable against reactions with the matrix elements copper and be zinc.
- the dispersoid particles In order to achieve a segregation that is as low as possible to achieve in the melt and the solidified casting structure, the dispersoid particles must be well wettable and you specific weight should correspond approximately to that of the melt.
- the compounds listed in Table 1 meet these criteria.
- the melting point of the dispersoid serves as a measure for assessing its thermal stability.
- the total content of the dispersoids is preferably 0.5 to 3 %.
- the elements yttrium and zirconium form copper and zinc intermetallic compounds with melting points below 980 ° C.
- Zirconium reacts with copper at 1116 ° C to Cu 4 Zr and at about 1050 ° C to Cu 6 Zr.
- the intermetallic phases are then, like the dispersion particles, as discrete particles at the grain boundaries.
- the total content of the elements added is preferably Yttrium and zirconium 0.2 to 2.5%.
- Copper and / or zinc can also have intermetallic phases can be set without involving the matrix elements.
- the phase-forming elements are initially in the melt solved.
- the actual phases are formed from the added ones Elements among themselves, due to their higher educational enthalpies compared to corresponding phases with Copper and / or zinc.
- these phases have an extraordinary thermodynamic Stability, which is also generally characterized by its high Expresses melting temperatures.
- the total content of these is preferably intermetallic Phase-forming elements 0.5 to 3%.
- the intermetallic phases listed in Table 2 essentially meet the criteria mentioned.
- the enthalpies of formation are not known for some compounds, but their suitability can be estimated from their melting temperatures.
- the standard enthalpy of formation of ⁇ -CuZn is about -18 kJ / mol for comparison.
- the total content of all additives is a maximum of 10%.
- Elemental copper and nickel were melted together with a Cu-Al master alloy at 1450 ° C. After the melt had cooled to 1100 ° C., elemental zinc was added. The composition of the melt was CuZn37 (Ni 3 Al) 2. The melt was poured off in a stand mold. The cast structure was then thermoformed with a degree of deformation of 55%, followed by 15% cold forming.
- Fig. 1 shows the casting structure of the material at 500 times magnification.
- the intermetallic Ni 3 Al phase is preferably in finely divided form in the ⁇ mixed crystals.
- Table 3 shows the mechanical characteristics determined in the cold-deformed state (Brinell hardness HB, tensile strength Rm, yield strength Rp 0.2, elongation A10, machining index Zi).
- the material has a machining index of approx. 80 to 90.
- Elemental copper was smelted together with a Cu-Co master alloy. After the addition of elemental zinc, the alloy with the composition CuZn39Co3 according to embodiment 1 was cast and processed.
- the mechanical characteristics of the cold-formed material are also summarized in Table 3 .
- the machining index is approximately 70 to 80.
- Fig. 6 shows a corresponding chip sample (see above conditions). Mechanical characteristics of the materials mentioned in the exemplary embodiments in comparison to commercial materials. Condition: 15% cold formed.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Domestic Plumbing Installations (AREA)
- Contacts (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Description
Verbindungen, die in Kupfer-Zink-Legierungen zur Einstellung von thermisch stabilen Dispersoiden mit spanbrechender Wirkung geeignet sind. | ||
Verbindung | Schmelztemp. in °C | Dichte in g/cm3 |
Cr2Ta | 2020 | 11,1 |
Dy2O3 | 2340 | 7,8 |
Er2O3 | 2400 | 8,6 |
MoB | 2600 | 8,6 |
Mo2C | 2687 | 8,9 |
NbC | 3500 | 7,8 |
Nd2O3 | 1900 | 7,2 |
Sm2O3 | < 1500 | 8,3 |
WS2 | 1250 | 7,5 |
WSi2 | 2165 | 9,4 |
Yb2O3 | 2227 | 9,1 |
ZrC | 3540 | 6,7 |
Intermetallische Verbindungen mit spanbrechender Wirkung in Kupfer-Zink-Legierungen. | |||
Verbindung | Schmelztemp. in °C | Dichte in g/cm3 | Standardbildungsenthalpie in kJ/mol |
LaAl2 | 1405 | 4,7 | - 150,6 |
La3Sb | ca. 1690 | ||
LaSb | ca. 1540 | 6,3 | |
La2Sn | 1420 | ca. 7 | |
Ni3Al | 1395 | 7,3 | - 153,1 |
NiAl | 1638 | 5,9 | - 118,4 |
Ni3Nb | ca. 1400 | 8,8 |
Der Werkstoff weist einen Zerspanungsindex von ca 80 bis 90 auf. Fig. 2 zeigt eine Makroaufnahme der resultierenden Drehspäne im Maßstab 1:1 (Schnittgeschwindigkeit vc = 100 m/Min., Vorschub f = 0,1 mm/U, Spantiefe a = 2,5 mm, Spanwinkel γ = 0°, Freiwinkel α = 8°).
Mechanische Kenndaten der in den Ausführungsbeispielen genannten Werkstoffe im Vergleich zu kommerziellen Werkstoffen. Zustand: 15 % kalt umgeformt. | ||||||
Beispiel | Werkstoff | HB 2,5/62,5 | Rm in N/mm2 | Rp0,2 in N/mm2 | A10 in % | Zi |
1 | CuZn39(Ni3Al)2 | 138 | 462 | 353 | 29,3 | 80 - 90 |
2 | CuZn39(Mo2C)2 | 131 | 450 | 348 | 21,8 | 70 - 80 |
3 | CuZn39Co3 | 128 | 465 | 371 | 27,8 | 70 - 80 |
CuZn39Pb3 | 128 | 485 | 345 | 23,2 | 100 | |
CuZn37 | 104 | 372 | 265 | 42 | < 40 |
Claims (7)
- Verwendung einer blei- und wismutfreien Kupfer-Zink-Legierung, die aus mindestens einem Zusatz aus mindestens einer der folgenden Gruppen a) bis d), Rest Kupfer und Zink im Verhältnis von 1,3 bis 2,0 besteht:a) die Gruppe besteht aus den thermisch stabilen Dispersoiden Cr2Ta, Dy2O3, Er2O3, MoB, Mo2C, NbC, Nd2O3, Sm2O3, WS2, WSi2, Yb2O3, ZrC im Gesamtgehalt von 0,1 bis 5,0 Gew.-%,b) die Gruppe besteht aus den Elementen Yttrium und Zirkonium im Gesamtgehalt von 0,1 bis 5,0 Gew.-%,c) die Gruppe besteht aus den intermetallischen Phasen bildenden Elementen Lanthan und Nickel im Gesamtgehalt von 0,1 bis 5,0 Gew.-%, denen jeweils mindestens ein weiteres der Elemente Aluminium, Niob, Antimon, Zinn im Gesamtgehalt von 0,1 bis 5,0 Gew.-% zugeordnet ist,d) die Gruppe besteht aus den ausscheidungsbildenden Elementen Silber, Kobalt, Magnesium, Titan im Gesamtgehalt von 1,0 bis 5,0 Gew.-%,
- Verwendung einer Kupfer-Zink-Legierung nach Anspruch 1,
bei welcher der Gesamtgehalt der Dispersoide 0,5 bis 3 % beträgt, für den Zweck nach Anspruch 1. - Verwendung einer Kupfer-Zink-Legierung nach Anspruch 1 oder 2,
bei welcher der Gesamtgehalt der zugesetzten Elemente Yttrium und Zirkonium 0,2 bis 2,5 % beträgt, für den Zweck nach Anspruch 1. - Verwendung einer Kupfer-Zink-Legierung nach einem oder mehreren der Ansprüche 1 bis 3,
bei welcher der Gesamtgehalt der intermetallische Phasen bildenden Elemente 0,5 bis 3 % beträgt, für den Zweck nach Anspruch 1. - Verwendung einer Kupfer-Zink-Legierung nach einem oder mehreren der Ansprüche 1 bis 4,
bei welcher der Gehalt der ausscheidungsbildenden Elemente Kobalt, Magnesium, Titan aus dem Bereich von 1 bis 3 % und der Silber-Gehalt aus dem Bereich von 3 bis 5 % derart ausgewählt ist, daß der Gesamtgehalt der Elemente 5 % nicht übersteigt, für den Zweck nach Anspruch 1. - Verwendung einer Kupfer-Zink-Legierung nach einem oder mehreren der Ansprüche 1 bis 5,
bei welcher der Gesamtgehalt aller Zusätze maximal 10 % beträgt, für den Zweck nach Anspruch 1. - Verwendung einer Kupfer-Zink-Legierung nach einem oder mehreren der Ansprüche 1 bis 6,
bei welcher das Verhältnis des Kupfer-Gehalts zum Zink-Gehalt zwischen 1,4 und 1,7 liegt, für den Zweck nach Anspruch 1.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4438485 | 1994-10-28 | ||
DE4438485A DE4438485C2 (de) | 1994-10-28 | 1994-10-28 | Verwendung einer Kupfer-Zink-Legierung für Trinkwasserinstallationen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0711843A2 EP0711843A2 (de) | 1996-05-15 |
EP0711843A3 EP0711843A3 (de) | 1996-12-11 |
EP0711843B1 true EP0711843B1 (de) | 1999-05-19 |
Family
ID=6531891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95116168A Expired - Lifetime EP0711843B1 (de) | 1994-10-28 | 1995-10-13 | Verwendung einer Kupfer-Zink-Legierung für Trinkwasserinstallationen |
Country Status (4)
Country | Link |
---|---|
US (1) | US5766377A (de) |
EP (1) | EP0711843B1 (de) |
DE (2) | DE4438485C2 (de) |
FI (1) | FI111856B (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11189856A (ja) * | 1997-10-24 | 1999-07-13 | Toto Ltd | 黄銅材、黄銅管材及びそれらの製造方法 |
DE10158130C1 (de) * | 2001-11-27 | 2003-04-24 | Rehau Ag & Co | Verwendung einer korrosionsbeständigen Kupfer-Zink-Legierung für Trinkwasserformteile |
US20030145681A1 (en) * | 2002-02-05 | 2003-08-07 | El-Shall M. Samy | Copper and/or zinc alloy nanopowders made by laser vaporization and condensation |
KR20050050654A (ko) * | 2002-09-13 | 2005-05-31 | 올린 코포레이션 | 시효 경화 구리계 합금 및 이의 가공방법 |
DE10301552B3 (de) * | 2003-01-16 | 2004-06-24 | Rehau Ag + Co. | Korrosionsbeständige Messinglegierung für Trinkwasserformteile |
CN1291051C (zh) * | 2004-01-15 | 2006-12-20 | 宁波博威集团有限公司 | 无铅易切削锑黄铜合金 |
US20060048553A1 (en) * | 2004-09-03 | 2006-03-09 | Keyworks, Inc. | Lead-free keys and alloys thereof |
CN1730692B (zh) * | 2005-08-09 | 2010-04-28 | 河北工业大学 | 一种功能合金材料及其制备方法和用途 |
DE102007015442B4 (de) * | 2007-03-30 | 2012-05-10 | Wieland-Werke Ag | Verwendung einer korrosionsbeständigen Kupferlegierung |
TWI485271B (zh) * | 2013-01-09 | 2015-05-21 | Globe Union Ind Corp | Low shrinkage corrosion resistant brass alloy |
CN104451247B (zh) * | 2014-11-20 | 2017-04-19 | 大连海事大学 | 具有防垢功能的纳米颗粒增强合金材料,其制备方法及应用 |
CN106086514B (zh) * | 2016-08-27 | 2017-12-05 | 泰州永盛包装股份有限公司 | 一种氧化钕弥散强化铜基合金及其制备方法 |
Family Cites Families (24)
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US1959509A (en) | 1930-06-14 | 1934-05-22 | Lucius Pitkin Inc | Copper base alloy |
IT979083B (it) * | 1973-02-13 | 1974-09-30 | Tonolli A E C Spa | Ottoni bifasici non fragili a caldo contenenti zirconio |
JPS5236733B2 (de) * | 1973-06-21 | 1977-09-17 | ||
GB1478162A (en) * | 1973-11-21 | 1977-06-29 | New Jersey Zinc Co | Powder-metallurgy of cobalt containing brass alloys |
JPS54135618A (en) | 1978-04-13 | 1979-10-22 | Sumitomo Metal Mining Co | Cuttable presssformable brass bismuth alloy |
JPS5629643A (en) * | 1979-08-16 | 1981-03-25 | Furukawa Kinzoku Kogyo Kk | Corrosion resistant free cutting brass |
JPS6013416B2 (ja) * | 1980-09-16 | 1985-04-06 | 三菱マテリアル株式会社 | 展伸加工性および耐候性にすぐれた白色Cu合金 |
JPS59133341A (ja) * | 1983-01-19 | 1984-07-31 | Mitsubishi Metal Corp | 耐食性および熱間加工性にすぐれた高強度Cu合金 |
JPS6082634A (ja) * | 1983-10-12 | 1985-05-10 | Nippon Mining Co Ltd | 耐食性に優れた銅合金 |
JPS6082632A (ja) * | 1983-10-12 | 1985-05-10 | Nippon Mining Co Ltd | 耐食性に優れた銅合金 |
JPS63100144A (ja) * | 1986-05-23 | 1988-05-02 | Nippon Mining Co Ltd | 耐食性に優れた銅合金 |
JPS6473035A (en) * | 1987-09-14 | 1989-03-17 | Yoshida Kogyo Kk | Cu shape memory alloy |
JPH02145736A (ja) * | 1988-11-25 | 1990-06-05 | Kobe Steel Ltd | 耐脱亜鉛腐食性が優れた銅合金 |
JPH03170647A (ja) * | 1989-11-28 | 1991-07-24 | Nippon Mining Co Ltd | 特殊黄銅の製造方法 |
JPH03291342A (ja) * | 1990-04-06 | 1991-12-20 | Chuetsu Gokin Chuko Kk | 耐摩耗性銅合金 |
JPH042416A (ja) * | 1990-04-17 | 1992-01-07 | Sumitomo Electric Ind Ltd | ワイヤ放電加工用電極線 |
US5167726A (en) * | 1990-05-15 | 1992-12-01 | At&T Bell Laboratories | Machinable lead-free wrought copper-containing alloys |
US5256214A (en) * | 1990-10-31 | 1993-10-26 | Olin Corporation | Copper alloys and method of manufacture thereof |
US5137685B1 (en) | 1991-03-01 | 1995-09-26 | Olin Corp | Machinable copper alloys having reduced lead content |
JP3399548B2 (ja) | 1991-03-30 | 2003-04-21 | 株式会社東洋伸銅所 | 熱間鍛造用合金 |
US5258108A (en) * | 1991-12-27 | 1993-11-02 | Blue Star Technologies, Ltd. | Fluid-treatment and conditioning apparatus and method |
BR9306475A (pt) * | 1992-06-02 | 1998-06-30 | Ideal Standard | Liga de latão |
US5330712A (en) * | 1993-04-22 | 1994-07-19 | Federalloy, Inc. | Copper-bismuth alloys |
US5360591A (en) * | 1993-05-17 | 1994-11-01 | Kohler Co. | Reduced lead bismuth yellow brass |
-
1994
- 1994-10-28 DE DE4438485A patent/DE4438485C2/de not_active Expired - Fee Related
-
1995
- 1995-10-13 DE DE59505964T patent/DE59505964D1/de not_active Expired - Fee Related
- 1995-10-13 EP EP95116168A patent/EP0711843B1/de not_active Expired - Lifetime
- 1995-10-25 FI FI955074A patent/FI111856B/fi active
-
1996
- 1996-09-16 US US08/714,498 patent/US5766377A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE4438485A1 (de) | 1996-05-02 |
EP0711843A2 (de) | 1996-05-15 |
FI955074A0 (fi) | 1995-10-25 |
DE4438485C2 (de) | 1998-05-20 |
FI955074A (fi) | 1996-04-29 |
DE59505964D1 (de) | 1999-06-24 |
EP0711843A3 (de) | 1996-12-11 |
US5766377A (en) | 1998-06-16 |
FI111856B (fi) | 2003-09-30 |
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