WO2021198236A1 - Pb-freie cu-zn-legierung - Google Patents
Pb-freie cu-zn-legierung Download PDFInfo
- Publication number
- WO2021198236A1 WO2021198236A1 PCT/EP2021/058264 EP2021058264W WO2021198236A1 WO 2021198236 A1 WO2021198236 A1 WO 2021198236A1 EP 2021058264 W EP2021058264 W EP 2021058264W WO 2021198236 A1 WO2021198236 A1 WO 2021198236A1
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- WIPO (PCT)
- Prior art keywords
- alloy
- free
- content
- alloy according
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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
-
- 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 relates to a Pb-free Cu-Zn alloy, in particular for the production of alloy products used under lubricated conditions.
- This alloy is also used to manufacture components that are used in hydraulics, such as distributor plates.
- This known alloy has the following composition (data in% by weight): Cu: 57.0 - 59.0%, Mn: 1.5 - 3.0%, Al: 1, 3 - 2.3%, Si: 0.3 - 1.3%, the remainder zinc and unavoidable impurities. Permissible admixtures are tolerated (data in% by weight): Ni: max. 1.0%, Fe: max. 1.0%, Sn: max. 0.4%, Pb: 0.2 - 0.8 %. As can be seen from the material designation already given, this previously known alloy contains Pb.
- the special brass alloy CW713R is characterized by versatile application properties, such as high wear and cavitation resistance, lubricant compatibility and sufficient mechanical properties, especially with regard to the strength and toughness of the alloy product. These also include good machinability.
- the element Pb is incorporated into brass alloys to achieve the desired machinability. For health and environmental reasons, efforts have recently been made to lay out lead-free brass alloys. Efforts are made, if possible, not to forego the properties brought about by the Pb element in the alloy.
- DE 102005017 574 A1 describes a wear-resistant brass alloy for synchronizer rings with an optional lead content.
- the composition (data in% by weight) is 57.5 - 59% copper, 2 - 3.5% manganese, 1 - 3% aluminum, 0.9 - 1.5% silicon, 0.15 - 0.4 % Iron, 0-1% lead, 0-1% nickel, 0-0.5% tin and the remainder zinc.
- WO 2014/152619 A1 discloses a brass alloy for turbochargers with the following composition, optionally containing lead (data in% by weight): 57-60% copper, 1.5-3.0% manganese, 1.3-2.3% Aluminum, 0.5-2.0% silicon, 0-1% nickel, 0-1% iron, 0-0.4% tin, 0-0.1% lead and the remainder zinc.
- JP S56-127741 A specifies a brass alloy with the following composition (data in% by weight): 54-66% copper, 1.0-5.0% manganese, 1.0-5.0% aluminum, 0 , 2 - 1, 5% silicon, 0.5 - 4.0% nickel, 0.1 - 2.0% iron, 0.2 - 2.0% tin and the remainder zinc.
- the invention is based on the object of proposing a Pb-free Cu-Zn alloy which is basically suitable for an application or use for which the alloy CuZn37Mn3AI2PbSi described above for the prior art is also suitable was. It would be desirable if the mechanical strength properties would even be improved compared to this textilekann th special brass alloy, but without having to accept losses in terms of cold and hot formability and machinability.
- Unavoidable impurities in the alloy are permitted at 0.05% by weight per element, whereby the sum of the unavoidable impurities does not exceed 0.15% by weight.
- This alloy is characterized above all by the selection of the alloy elements Ni, Fe and Sn, as well as by the claimed contents of these elements in the alloy composition in relation to the other alloy elements, especially Mn, Al and Si.
- This balanced alloy composition ensures particularly good properties of the alloy product in terms of cold and hot formability, machinability, strength and wear resistance, the latter especially under lubricated conditions.
- Bi is used as a Pb substitute in other special brass alloys, but the alloy according to the invention does not use Bi.
- the previously known alloy CuZn37Mn3AI2PbSi also has good hot formability
- the subject matter of the claimed alloy not only has particularly good hot formability, but also good cold formability. The latter was not the case with the previously known alloy.
- the alloy structure contains a proportion of ⁇ mixed crystals of less than 3 - 5%.
- the same advantages of stress relief annealing also apply to extruded products, whereby a structure with a mixed crystal content of 10-15% can also be achieved by the thermal treatment mentioned.
- the strength values achievable with this alloy and the surprisingly significantly better cavitation resistance than comparative alloys were not foreseeable for the people involved in the development of this alloy.
- the alloy products produced from the alloy according to the invention by forging have a 0.2% yield strength between 330 and 350 MPa, which is significantly more than was usual with forgings of the alloy CuZn37Mn3AI2PbSi (values from 230 to 300 MPa).
- the tensile strength of alloy products made from the alloy of the invention is 600 to 640 MPa. In the case of the previously known alloy CuZn37Mn3AI2PbSi, the tensile strength values are usually between 590 and 670 MPa. Somewhat higher tensile strength values can also be achieved with special treatments.
- the special properties of an alloy product made from this alloy are based on the fact that the Si content is preferably not less than the Ni content. Furthermore, the Sn content of the alloy is preferably adjusted so that it is a maximum of only 50% of the Ni content or a maximum of 50% of the Si content. The Ni content is preferably not less than the Si content, deviations of up to 0.075% being tolerated.
- the Fe content also plays a role in interaction with the other elements. The Fe content is preferably about 0.05% to 0.1% by weight less than the Ni content.
- FIGS. 1a, 1b show photomicrographs of the sample 1 in the pressing state from the start of the pressing (FIG. 1a along the pressing direction; FIG. 1b transversely to the pressing direction).
- Figures 2a, 2b show corresponding microstructural images from the end of the press.
- the samples cut from the pressed rods were thermally relaxed in a subsequent step, namely for three hours at 360 ° C. Solid solution content of about 14% has been formed. The proportion of intermetallic phases is a good 3%.
- FIGS. 3a, 3b show microstructural images of sample 2 after the stress relief annealing described above.
- the intermetallic phases are designated with IMP.
- the HBW hardness was measured as HBW 2.5 / 62.5.
- the structure of the comparative sample CW713R in the pressed state is dominated by ⁇ -phases with a proportion of ⁇ -mixed crystal phase of around 10%.
- the Pb contained in this alloy has a grain-refining effect and serves as a chip breaker.
- FIG. 4 shows a microstructure in sample CW713R in the pressed state and after an annealing treatment, corresponding to that of sample 2.
- the proportion of a mixed crystal phase is approximately 40-45%.
- FIGS. 5a, 5b The resulting microstructure of a preliminary product forged in this way for a distributor plate for a hydraulic application is shown in FIGS. 5a, 5b.
- FIG. 5a shows the microstructure at the edge
- FIG. 5b shows the microstructure in the core of the forged product.
- the proportion of a-phase increases significantly, up to about 40%.
- the alloy product according to the invention can be drawn directly. However, intermediate annealing before drawing is preferred in order to achieve an alloy product that is as stress-free as possible. Furthermore, additional investigations with the alloy compositions of samples 1 and 2 for differently set material states have shown that the tensile strength R m , the 0.2% proof stress, the elongation at break and the hardness HB also for directly drawn or for drawn after an intermediate annealing step Samples compared to semi-finished products made from the comparative alloy CW713R are significantly higher. The same was found for the variants of the specimens for a material condition after a final stress-relieving anneal.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202180014863.2A CN115103921A (zh) | 2020-03-30 | 2021-03-30 | 无铅的铜锌合金 |
US17/790,947 US20230091831A1 (en) | 2020-03-30 | 2021-03-30 | Pb free Cu-Zn alloy |
JP2022558022A JP2023520678A (ja) | 2020-03-30 | 2021-03-30 | Pbを含まないCu-Zn合金 |
KR1020227037503A KR20220155437A (ko) | 2020-03-30 | 2021-03-30 | Pb-비함유 Cu-Zn 합금 |
ES21716326T ES2927042T3 (es) | 2020-03-30 | 2021-03-30 | Aleación de Cu-Zn libre de Pb |
BR112022015524A BR112022015524A2 (pt) | 2020-03-30 | 2021-03-30 | Liga de cu-zn isenta de pb |
EP21716326.0A EP3908682B1 (de) | 2020-03-30 | 2021-03-30 | Pb-freie cu-zn-legierung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202020101700.4U DE202020101700U1 (de) | 2020-03-30 | 2020-03-30 | Pb-freie Cu-Zn-Legierung |
DE202020101700.4 | 2020-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021198236A1 true WO2021198236A1 (de) | 2021-10-07 |
Family
ID=75377759
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/058264 WO2021198236A1 (de) | 2020-03-30 | 2021-03-30 | Pb-freie cu-zn-legierung |
Country Status (9)
Country | Link |
---|---|
US (1) | US20230091831A1 (de) |
EP (1) | EP3908682B1 (de) |
JP (1) | JP2023520678A (de) |
KR (1) | KR20220155437A (de) |
CN (1) | CN115103921A (de) |
BR (1) | BR112022015524A2 (de) |
DE (1) | DE202020101700U1 (de) |
ES (1) | ES2927042T3 (de) |
WO (1) | WO2021198236A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021118907A1 (de) * | 2021-07-21 | 2023-01-26 | Diehl Brass Solutions Stiftung & Co. Kg | Bleifreie Messinglegierung und Verwendung derselben |
CN115198139B (zh) * | 2022-08-31 | 2023-06-09 | 宁波金田铜业(集团)股份有限公司 | 一种耐磨黄铜合金棒材及其制备方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56127741A (en) | 1980-03-06 | 1981-10-06 | Honda Motor Co Ltd | Abrasion resistant copper alloy |
DE102005017574A1 (de) | 2005-04-16 | 2006-10-26 | Diehl Metall Stiftung & Co.Kg | Kupfer-Zink-Legierung und Verwendung einer solchen Legierung |
US20140259674A1 (en) * | 2013-03-15 | 2014-09-18 | Honeywell International Inc. | Brass alloys for use in turbocharger bearing applications |
US20160040269A1 (en) * | 2013-05-24 | 2016-02-11 | Wieland-Werke Ag | Refill for a ball-point pen and use thereof |
US20170145549A1 (en) * | 2014-05-16 | 2017-05-25 | Otto Fuchs Kommanditgesellschaft | High-Tensile Brass Alloy and Alloy Product |
JP2019178694A (ja) * | 2018-03-30 | 2019-10-17 | 株式会社Ihi | 過給機 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007029991B4 (de) * | 2007-06-28 | 2013-08-01 | Wieland-Werke Ag | Kupfer-Zink-Legierung, Verfahren zur Herstellung und Verwendung |
PL2806044T3 (pl) * | 2007-06-28 | 2018-03-30 | Wieland-Werke Ag | Stop miedzi i cynku, sposób jego wytwarzania i zastosowanie |
TW201114926A (en) * | 2009-10-29 | 2011-05-01 | Globe Union Ind Corp | Eco-frienly brass alloy |
CN101787461B (zh) * | 2010-03-02 | 2014-11-19 | 路达(厦门)工业有限公司 | 一种环保型锰黄铜合金及其制造方法 |
CN102251142A (zh) * | 2011-07-25 | 2011-11-23 | 龙工(上海)桥箱有限公司 | 一种行走马达用球铰的材料 |
CN102851533A (zh) * | 2012-09-26 | 2013-01-02 | 宁波正元铜合金有限公司 | 一种复杂黄铜及其制备方法和应用 |
CN103589903B (zh) * | 2013-08-16 | 2016-04-20 | 武汉泛洲中越合金有限公司 | 一种高强度耐磨铜合金及其制造方法 |
CN103725922B (zh) * | 2014-01-16 | 2017-06-20 | 沈阳亚欧星海铜业有限公司 | 一种无铅硅黄铜合金及制备方法 |
DE102014014239B4 (de) * | 2014-09-25 | 2024-04-11 | Wieland-Werke Ag | Elektrisches Verbindungselement |
DE202016102696U1 (de) * | 2016-05-20 | 2017-08-29 | Otto Fuchs - Kommanditgesellschaft - | Sondermessinglegierung sowie Sondermessinglegierungsprodukt |
CN109930025A (zh) * | 2019-03-22 | 2019-06-25 | 广东出入境检验检疫局检验检疫技术中心 | 一种无铅环保易切削黄铜材料 |
-
2020
- 2020-03-30 DE DE202020101700.4U patent/DE202020101700U1/de active Active
-
2021
- 2021-03-30 US US17/790,947 patent/US20230091831A1/en active Pending
- 2021-03-30 CN CN202180014863.2A patent/CN115103921A/zh active Pending
- 2021-03-30 JP JP2022558022A patent/JP2023520678A/ja active Pending
- 2021-03-30 BR BR112022015524A patent/BR112022015524A2/pt unknown
- 2021-03-30 KR KR1020227037503A patent/KR20220155437A/ko unknown
- 2021-03-30 ES ES21716326T patent/ES2927042T3/es active Active
- 2021-03-30 EP EP21716326.0A patent/EP3908682B1/de active Active
- 2021-03-30 WO PCT/EP2021/058264 patent/WO2021198236A1/de unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56127741A (en) | 1980-03-06 | 1981-10-06 | Honda Motor Co Ltd | Abrasion resistant copper alloy |
DE102005017574A1 (de) | 2005-04-16 | 2006-10-26 | Diehl Metall Stiftung & Co.Kg | Kupfer-Zink-Legierung und Verwendung einer solchen Legierung |
US20140259674A1 (en) * | 2013-03-15 | 2014-09-18 | Honeywell International Inc. | Brass alloys for use in turbocharger bearing applications |
WO2014152619A1 (en) | 2013-03-15 | 2014-09-25 | Honeywell International Inc. | Brass alloys for use in turbocharger bearing applications |
US20160040269A1 (en) * | 2013-05-24 | 2016-02-11 | Wieland-Werke Ag | Refill for a ball-point pen and use thereof |
US20170145549A1 (en) * | 2014-05-16 | 2017-05-25 | Otto Fuchs Kommanditgesellschaft | High-Tensile Brass Alloy and Alloy Product |
JP2019178694A (ja) * | 2018-03-30 | 2019-10-17 | 株式会社Ihi | 過給機 |
Also Published As
Publication number | Publication date |
---|---|
CN115103921A (zh) | 2022-09-23 |
US20230091831A1 (en) | 2023-03-23 |
EP3908682B1 (de) | 2022-08-17 |
DE202020101700U1 (de) | 2021-07-01 |
JP2023520678A (ja) | 2023-05-18 |
BR112022015524A2 (pt) | 2022-10-11 |
EP3908682A1 (de) | 2021-11-17 |
ES2927042T3 (es) | 2022-11-03 |
KR20220155437A (ko) | 2022-11-22 |
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