EP0572959B1 - Alliage de laiton - Google Patents
Alliage de laiton Download PDFInfo
- Publication number
- EP0572959B1 EP0572959B1 EP93108730A EP93108730A EP0572959B1 EP 0572959 B1 EP0572959 B1 EP 0572959B1 EP 93108730 A EP93108730 A EP 93108730A EP 93108730 A EP93108730 A EP 93108730A EP 0572959 B1 EP0572959 B1 EP 0572959B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- brass
- alloy
- samples
- brass alloy
- dezincification
- 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
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
Definitions
- the invention relates to a brass alloy, that is to say a kneaded or cast copper-zinc alloy.
- a brass alloy that is to say a kneaded or cast copper-zinc alloy.
- Such alloys are used, for example, in the optical industry, the jewelry industry, in the manufacture of pumps and in the manufacture of components for drinking water or sanitary installations.
- brass types with certain properties can be obtained. For example, it is common to add brass lead to improve machinability.
- Such types of brass are also referred to as "automatic brass”.
- Leaded brass grades for example Gk Ms 60 Fk, are used to manufacture components for sanitary installations, in particular water fittings.
- Such brass alloys have the disadvantage that they are not resistant to dezincification. Under corrosive influences, the zinc is released from the grain boundary areas, first of all from the layers near the surface. As dezincing progresses into the depth of the material, the structural structure of the workpiece is increasingly changed, which has the generally known consequences. With water fittings that come into contact with relatively aggressive water, this can lead to leaks in the fitting and ultimately make it necessary to replace it.
- the object of the invention is to provide a brass alloy in which this disadvantage does not occur. This object is achieved by a brass alloy with the composition mentioned in claim 1.
- the alloy according to the invention is resistant to dezincification and also has mechanical properties which it is particularly suitable for the production make components suitable for water installation, such as valves and fittings.
- FR-A-2 353 648 discloses (in claim 4) a good dezincification resistant brass alloy with 62.5-63.5% Cu, 1.3-1.6% Pb, traces of up to 0.3% Mn and Si each , 0.3-0.4% Al, 0.10-0.15% Sb, up to 0.25% Fe and Ni, 0.3-0.5% Sn, traces of Cr, Mg, As, Rest Zn.
- the mechanical characteristics of the alloy according to the invention are comparable to the brass alloys previously used for the stated purpose.
- the structure of the alloy according to the invention essentially has globular grains with a maximum size of approximately 100 ⁇ m.
- a fine-grained structure is the prerequisite for a melt to be void-free, i.e. solidifies without the formation of cavities or porous, sponge-like areas.
- the structural defects mentioned are responsible, for example, for surface defects and leaks in fittings.
- the alloy according to the invention was subjected to a dezincification resistance test according to ISO 6509 (Corrosion of metals and alloys / Determination of decincification resistance of brass, 1981 edition). The depth of dezincification was measured in the polished section. The result of the dezincification resistance test is shown in the following table: Table 1: Dezincification depth ( ⁇ m) P1-4 ⁇ 393 P5 70 P6 100
- the samples P1 - P4 concern a conventional brass with the following composition (in% by weight): 60.06% Cu, 1.65% Pb, ⁇ 0.010% Mn, ⁇ 0.010% Si, 0.65% Al, 0.020% Sb, 0.0008% B, 0.080% Fe, 0.030% Ni, 0.10% Sn and the remainder Zn.
- the values for the samples P 1 - P 4 were summarized in one line and the average value of the dezincification depth was given; the maximum value was 600 ⁇ m, the minimum was 200 ⁇ m.
- Samples P 11 to P14 are comparative samples which were cast from a conventional brass alloy with a composition corresponding to samples P1 to P4.
- Water fittings were cast with the alloy according to the invention and processed using customary production methods. It was found that the surface of the castings has at least as good a polishability as that of fittings cast from conventional brass alloys. It no significant differences were observed when machining the castings on automatic production machines. It was possible to retain the processing and setting parameters that were previously common.
- FIG. 1 The casting shown in FIG. 1 was used in a series of experiments. The break was carried out along the line II-II. The fault line was chosen so that it runs through a casting-critical area, in which experience has shown that structural defects occur very frequently.
- FIG. 2 shows a 10-fold enlargement of the break point of a specimen made from a conventional brass alloy.
- a spongy loosened area marked L can be clearly seen, which extends almost over the entire thickness D of the cast part wall. Such areas can later lead to leaks. If the areas extend across the entire thickness of a partition, there is a leak from the start in the case of a water fitting.
- 3 shows the breaking point of a specimen cast with the alloy according to the invention. It can be clearly seen that there is a continuously fine-grained and dense structure. A total of ten samples were examined in each case. Sponge-like areas as shown in FIG. 2 occurred in 5 of the comparison samples. The samples from the alloy according to the invention were always free from the structural defects mentioned.
- the structure of the alloy according to the invention has approximately globulitic grains with a maximum size of 100 ⁇ m.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Adornments (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Soft Magnetic Materials (AREA)
- Mechanical Operated Clutches (AREA)
- Contacts (AREA)
Claims (5)
- Alliage de laiton caractérisé par la composition suivante (% en masse) :Cu : 62,5 - 64 %Pb : 0,5 - 1,5 %Mn : 0,3 - 0,4 %Si : 0,5 - 0,7 %Al: 0,3 - 0,7 %Sb : 0,05 - 0,15 %B: 5 - 20 ppmFe: 0 - 0,25 %Ni : 0 - 0,5 %Sn: 0 - 0,25 %Zn: reste
- Alliage de laiton selon la revendication 1 caractérisé par la composition suivante (% en masse) :Cu : 62,5 - 64 %Pb : 1,0 - 1,5 %Mn : 0,3 - 0,4 %Si : 0,5 - 0,7 %Al : 0,3 - 0,7 %Sb : 0,05 - 0,1 %B : 5 - 15 ppmFe : 0 - 0,20 %Ni : 0 - 0,5 %Sn : 0 - 0,25 %Zn : reste
- Alliage de laiton selon la revendication 1 caractérisé par la composition suivante (% en masse) :Cu : 63,20 %Pb : 1,38 %Mn : 0,39 %Si : 0,55 %Al : 0,55 %Sb : 0,09 %B : 9 ppmFe : 0,23 %Ni : 0,19 %Sn : 0,21 %Zn : reste
- Alliage de laiton selon la revendication 2 caractérisé par la composition suivante (% en masse) :Cu : 63,58 %Pb : 1,20 %Mn : 0,37 %Si : 0,55 %Al : 0,54 %Sb : 0,09 %B : 11 ppmFe : 0,15 %Ni : 0,16 %Sn : 0,15 %Zn : reste
- Utilisation d'un alliage selon les revendications 1 à 4 pour la fabrication d'éléments pour installations d'eau potable.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4218514 | 1992-06-02 | ||
DE4218514 | 1992-06-02 | ||
DE4318377A DE4318377C2 (de) | 1992-06-02 | 1993-05-28 | Messinglegierung |
DE4318377 | 1993-05-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0572959A1 EP0572959A1 (fr) | 1993-12-08 |
EP0572959B1 true EP0572959B1 (fr) | 1997-02-19 |
Family
ID=25915427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93108730A Expired - Lifetime EP0572959B1 (fr) | 1992-06-02 | 1993-05-29 | Alliage de laiton |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0572959B1 (fr) |
AT (1) | ATE149042T1 (fr) |
AU (1) | AU664092B2 (fr) |
ES (1) | ES2099863T3 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE514752C2 (sv) | 1999-08-26 | 2001-04-09 | Tour & Andersson Hydronics Ab | Avzinkningsbeständig mässingslegering för pressgjutning |
DE10158130C1 (de) * | 2001-11-27 | 2003-04-24 | Rehau Ag & Co | Verwendung einer korrosionsbeständigen Kupfer-Zink-Legierung für Trinkwasserformteile |
DE10308778B3 (de) | 2003-02-28 | 2004-08-12 | Wieland-Werke Ag | Bleifreie Kupferlegierung und deren Verwendung |
CN101451204B (zh) * | 2008-12-15 | 2010-10-13 | 无锡吉泉五金机械有限公司 | 汽车空调用导向球及其制备方法 |
DE102013004081B4 (de) * | 2013-03-11 | 2023-06-07 | Hansa Metallwerke Ag | Sanitärer Armaturenkörper |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH540342A (de) * | 1970-08-20 | 1973-08-15 | Olof Manner Ab | Kupfer-Zinklegierung |
DE2159482A1 (de) * | 1971-12-01 | 1973-06-07 | Schreiber Gmbh Carl | Verwendung einer gusslegierung aus sondermessing |
FR2353648A1 (fr) * | 1976-05-31 | 1977-12-30 | Afica | Alliage de laiton biphase pour fonderie presentant des proprietes ameliorees de mise en oeuvre et une tres bonne resistance des pieces coulees a la dezincification |
SE8800931D0 (sv) * | 1988-03-16 | 1988-03-16 | Tour & Andersson Ab | Messingslegering och sett att framstella densamma |
-
1993
- 1993-05-29 AT AT93108730T patent/ATE149042T1/de not_active IP Right Cessation
- 1993-05-29 EP EP93108730A patent/EP0572959B1/fr not_active Expired - Lifetime
- 1993-05-29 ES ES93108730T patent/ES2099863T3/es not_active Expired - Lifetime
- 1993-06-02 AU AU40004/93A patent/AU664092B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
ATE149042T1 (de) | 1997-03-15 |
AU664092B2 (en) | 1995-11-02 |
AU4000493A (en) | 1993-12-09 |
ES2099863T3 (es) | 1997-06-01 |
EP0572959A1 (fr) | 1993-12-08 |
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