EP4584407A1 - Bleifreie messinglegierung und daraus hergestelltes maschinenelement - Google Patents
Bleifreie messinglegierung und daraus hergestelltes maschinenelementInfo
- Publication number
- EP4584407A1 EP4584407A1 EP23767827.1A EP23767827A EP4584407A1 EP 4584407 A1 EP4584407 A1 EP 4584407A1 EP 23767827 A EP23767827 A EP 23767827A EP 4584407 A1 EP4584407 A1 EP 4584407A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lead
- weight
- brass alloy
- free brass
- 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.)
- Pending
Links
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 lead-free brass alloy.
- the invention is therefore based on the object of providing a lead-free brass alloy that is easy to machine.
- the brass alloy according to the invention contains: 55 to 59% by weight of Cu, 2.0 to 2.5% by weight of Mn, 0.65 to 1.5% by weight of Si, less than 0.1% by weight of Pb, the balance Zn and unavoidable contamination.
- the brass alloy according to the invention has less than 0.1% by weight of Pb and is therefore considered lead-free. It has been shown that the brass alloy according to the invention shows satisfactory machinability despite the low lead content of less than 0.1% by weight. In particular, no unwanted long spiral chips are formed during machining. In addition, the friction properties of the lead-free brass alloy according to the invention are comparable to those of a lead-containing brass alloy.
- An advantageous embodiment of the invention provides that the ratio of the weight percent of Mn to Si corresponds to the inequality 2.0 ⁇ Mn/Si ⁇ 2.9. It has been found that this ratio between manganese and silicon leads to an optimal chemical composition and the formation of manganese silicides.
- the lead-free brass alloy according to the invention preferably contains less than 0.2% by weight of Fe.
- the lead-free brass alloy according to the invention preferably contains less than 0.5% by weight of Sn.
- the lead-free brass alloy according to the invention preferably contains 1.5 to 2.6% by weight of Ni.
- composition of the lead-free brass alloy according to the invention is particularly preferred: 57% by weight Cu, 2.3% by weight Mn, 1.0% by weight Si, 0.1% by weight Fe, 0.1% by weight Sn, 2 .0% by weight Ni, less than 0.1% by weight Pb, balance Zn and unavoidable impurities.
- a preferred embodiment of the invention provides that the lead-free brass alloy contains less than 0.1% by weight of Al.
- the invention relates to a machine element which is made from the lead-free brass alloy according to the invention. Due to its good friction properties, the lead-free brass alloy is ideal for the production of machine elements that are used with a lubricant.
- the invention is explained below using an exemplary embodiment with reference to the drawings.
- the drawings are schematic representations and show:
- Fig. 2 shows a chip image produced by machining a lead-free brass alloy according to the invention.
- An embodiment of the lead-free brass alloy has the following composition: 57% by weight Cu; 2.3% by weight Mn; 1.0% by weight Si; 0.1% by weight Fe; 0.1% by weight Sn; 2.0% by weight Ni; less than 0.1% by weight Pb; Rest of Zn and unavoidable impurities.
- the copper equivalent (CuEq) of the lead-free brass alloy is between 53% and 66% and can be calculated based on the alloy components as follows:
- Ni wt% nickel
- the lead-free brass alloy can be made into semi-finished products such as plates, pipes or bars, which can be used to make machine elements that are used with a lubricant.
- semi-finished products such as plates, pipes or bars
- An example of this are components of axial piston pumps subjected to friction.
- the lead-free brass alloy contains manganese silicides, which are responsible for the good friction properties.
- the machinability of the lead-free brass alloy is compared with a reference alloy.
- the table below shows the compositions of the lead-free brass alloy and the reference alloy:
- Fig. 1 shows the chip pattern of the lead-containing reference alloy
- Fig. 2 shows the chip pattern of the lead-free brass alloy in comparison. It can be seen that both alloys produce chips of approximately the same size and type. The chip quality of the lead-free brass alloy is therefore okay.
- the lead-free brass alloy can be used for the production of various machine elements, especially machine elements that are subjected to friction and are used with a lubricant.
- machine elements especially machine elements that are subjected to friction and are used with a lubricant.
- An example of this are components of axial piston pumps or sliding shoes.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Conductive Materials (AREA)
- Sliding-Contact Bearings (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022122831.2A DE102022122831A1 (de) | 2022-09-08 | 2022-09-08 | Bleifreie Messinglegierung und daraus hergestelltes Maschinenelement |
| PCT/EP2023/074002 WO2024052221A1 (de) | 2022-09-08 | 2023-09-01 | Bleifreie messinglegierung und daraus hergestelltes maschinenelement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4584407A1 true EP4584407A1 (de) | 2025-07-16 |
Family
ID=87974552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23767827.1A Pending EP4584407A1 (de) | 2022-09-08 | 2023-09-01 | Bleifreie messinglegierung und daraus hergestelltes maschinenelement |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20250197971A1 (https=) |
| EP (1) | EP4584407A1 (https=) |
| JP (1) | JP2025529999A (https=) |
| KR (1) | KR20250053089A (https=) |
| CN (1) | CN119790174A (https=) |
| DE (1) | DE102022122831A1 (https=) |
| MX (1) | MX2025002757A (https=) |
| WO (1) | WO2024052221A1 (https=) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN121250177A (zh) * | 2025-10-16 | 2026-01-02 | 浙江海亮股份有限公司 | 一种耐蚀易切削黄铜合金、制备方法及应用 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63130738A (ja) * | 1986-11-20 | 1988-06-02 | Nippon Mining Co Ltd | 快削銅合金 |
| EP2806044B1 (de) | 2007-06-28 | 2017-09-13 | Wieland-Werke AG | Kupfer-Zink-Legierung, Verfahren zur Herstellung und Verwendung |
| JP5253440B2 (ja) * | 2010-03-01 | 2013-07-31 | 大同メタル工業株式会社 | 内燃機関用過給機のすべり軸受 |
| KR101340487B1 (ko) * | 2011-09-30 | 2013-12-12 | 주식회사 풍산 | 쾌삭성 무연 구리합금 및 이의 제조방법 |
| CN102925743B (zh) * | 2012-11-12 | 2016-05-18 | 宁波博威合金材料股份有限公司 | 一种无铅耐磨铜合金 |
| DE102014106933A1 (de) | 2014-05-16 | 2015-11-19 | Otto Fuchs Kg | Sondermessinglegierung und Legierungsprodukt |
| DE102014014239B4 (de) | 2014-09-25 | 2024-04-11 | Wieland-Werke Ag | Elektrisches Verbindungselement |
| DE102016008928A1 (de) | 2016-07-21 | 2018-01-25 | Wieland-Werke Ag | Werkstoff aus einer Kupfer-Zink-Legierung, Verfahren zur Herstellung eines solchen Werkstoffs und Gleitelement aus einem solchen Werkstoff |
-
2022
- 2022-09-08 DE DE102022122831.2A patent/DE102022122831A1/de active Pending
-
2023
- 2023-09-01 KR KR1020257007730A patent/KR20250053089A/ko active Pending
- 2023-09-01 JP JP2025514636A patent/JP2025529999A/ja active Pending
- 2023-09-01 WO PCT/EP2023/074002 patent/WO2024052221A1/de not_active Ceased
- 2023-09-01 CN CN202380062475.0A patent/CN119790174A/zh active Pending
- 2023-09-01 EP EP23767827.1A patent/EP4584407A1/de active Pending
-
2025
- 2025-03-04 US US19/069,297 patent/US20250197971A1/en active Pending
- 2025-03-07 MX MX2025002757A patent/MX2025002757A/es unknown
Also Published As
| Publication number | Publication date |
|---|---|
| KR20250053089A (ko) | 2025-04-21 |
| CN119790174A (zh) | 2025-04-08 |
| WO2024052221A1 (de) | 2024-03-14 |
| JP2025529999A (ja) | 2025-09-09 |
| US20250197971A1 (en) | 2025-06-19 |
| DE102022122831A1 (de) | 2024-03-14 |
| MX2025002757A (es) | 2025-05-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
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| 17P | Request for examination filed |
Effective date: 20250227 |
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| AK | Designated contracting states |
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| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) |