US20250197971A1 - Lead-free brass alloy and machine element produced therefrom - Google Patents

Lead-free brass alloy and machine element produced therefrom Download PDF

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Publication number
US20250197971A1
US20250197971A1 US19/069,297 US202519069297A US2025197971A1 US 20250197971 A1 US20250197971 A1 US 20250197971A1 US 202519069297 A US202519069297 A US 202519069297A US 2025197971 A1 US2025197971 A1 US 2025197971A1
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United States
Prior art keywords
lead
brass alloy
free brass
free
less
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Pending
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US19/069,297
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English (en)
Inventor
Florian Seuss
Patrick Feldner
Volker Bräutigam
Alexander Dehnelt
Sven Reimus
Miroslava Sakaliyska
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VDM Metals International GmbH
Diehl Brass Solutions Stiftung and Co KG
Original Assignee
VDM Metals International GmbH
Diehl Brass Solutions Stiftung and Co KG
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by VDM Metals International GmbH, Diehl Brass Solutions Stiftung and Co KG filed Critical VDM Metals International GmbH
Assigned to DIEHL BRASS SOLUTIONS STIFTUNG & CO. KG, VDM METALS INTERNATIONAL GMBH reassignment DIEHL BRASS SOLUTIONS STIFTUNG & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REIMUS, SVEN, Sakaliyska, Miroslava, Bräutigam, Volker, DEHNELT, ALEXANDER, Feldner, Patrick, Seuss, Florian
Publication of US20250197971A1 publication Critical patent/US20250197971A1/en
Pending legal-status Critical Current

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    • 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.
  • a lead-free brass containing: 55 to 59 wt % of Cu, 2.0 to 2.5 wt % of Mn, 0.65 to 1.5 wt % of Si, less than 0.1 wt % of Pb, and a balance of Zn and also unavoidable impurities.
  • the brass alloy of the invention possesses less than 0.1 wt % of Pb and is therefore deemed to be lead-free. It has emerged that in spite of the low lead content of less than 0.1 wt %, the brass alloy of the invention exhibits satisfactory machineability. In particular, machining is not accompanied by the formation of any unwanted long spiral chips. Furthermore, the frictional properties of the lead-free brass alloy of the invention are comparable with those of a lead-containing brass alloy.
  • the ratio of the weight percentages of Mn to Si corresponds to the inequation 2.0 ⁇ Mn/Si ⁇ 2.9. It has been found that this ratio between manganese and silicon leads to an optimal chemical composition and to the formation of manganese silicides.
  • the copper equivalent is 53 to 66%.
  • the lead-free brass alloy of the invention there is preferably less than 0.2 wt % of Fe.
  • the lead-free brass alloy of the invention there is preferably less than 0.5 wt % of Sn.
  • the lead-free brass alloy of the invention there is preferably 1.5 to 2.6 wt % of Ni.
  • composition of the lead-free brass alloy of the invention is particularly preferred: 57 wt % of Cu, 2.3 wt % of Mn, 1.0 wt % of Si, 0.1 wt % of Fe, 0.1 wt % of Sn, 2.0 wt % of Ni, less than 0.1 wt % of Pb, and a balance Zn and also unavoidable impurities.
  • the lead-free brass alloy contains less than 0.1 wt % of Al.
  • the lead-free brass alloy it may also be the case that there is less than 0.25 wt % of Cr and/or less than 0.25 wt of Ti and/or less than 0.25 wt % of Co.
  • the lead-free brass alloy of the invention Due to its good frictional properties, the lead-free brass alloy is ideally suited to the production of machine elements which are used with a lubricant.
  • FIG. 1 is a diagrammatic, plan view showing a chip pattern generated by machining a reference alloy
  • FIG. 2 is a plan view showing a chip pattern generated by machining a lead-free brass alloy of the invention.
  • one exemplary embodiment of the lead-free brass alloy has the following composition: 57 wt % of Cu; 2.3 wt % of Mn; 1.0 wt % of Si; 0.1 wt % of Fe; 0.1 wt % of Sn; 2.0 wt % of Ni; less than 0.1 wt % of Pb; and a balance Zn and also unavoidable impurities.
  • the copper equivalent (Cu Eq) of the lead-free brass alloy is between 53% and 66% and may be calculated as follows on the basis of the alloy constituents:
  • the lead-free brass alloy can be processed into intermediates such as plates, tubes or rods, from which machine elements used with a lubricant can be produced.
  • intermediates such as plates, tubes or rods, from which machine elements used with a lubricant can be produced.
  • machine elements used with a lubricant can be produced.
  • One example of these are axial piston pump components that are subject to friction.
  • the lead-free brass alloy includes manganese silicides, which are responsible for the good frictional properties.
  • Lead-free brass alloy Reference alloy chip (chip pattern FIG. 2) pattern FIG. 1) 57.2 wt % Cu, 57.2 wt % Cu, 2.3 wt % Mn, 2.2 wt % Mn, 1.0 wt % Si, 1.0 wt % Si, 0.1 wt % Fe, 0 wt % Fe, 0.05 wt % Sn, 0 wt % Sn, 0 wt % Pb, 0.66 wt % Pb.
  • FIG. 1 shows the chip pattern of the lead-containing reference alloy
  • FIG. 2 shows, in comparison to this, the chip pattern of the lead-free brass alloy. It is apparent that the two alloys generate chips of approximately the same size and kind. The chip quality of the lead-free brass alloy is therefore satisfactory.
  • the frictional coefficient was ascertained in identical trials. It was discovered that both the lead-free brass alloy and the lead-containing reference alloy possess virtually identical friction coefficients. The friction coefficient is about 0.012.
  • the lead-free brass alloy can be used for producing various machine elements, especially machine elements which are subject to friction and are used with a lubricant.
  • machine elements especially machine elements which are subject to friction and are used with a lubricant.
  • An example of these are axial piston pump components or sliding blocks.

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  • 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)
US19/069,297 2022-09-08 2025-03-04 Lead-free brass alloy and machine element produced therefrom Pending US20250197971A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102022122831.2 2022-09-08
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

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/074002 Continuation WO2024052221A1 (de) 2022-09-08 2023-09-01 Bleifreie messinglegierung und daraus hergestelltes maschinenelement

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US20250197971A1 true US20250197971A1 (en) 2025-06-19

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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=)

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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

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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

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KR20250053089A (ko) 2025-04-21
CN119790174A (zh) 2025-04-08
WO2024052221A1 (de) 2024-03-14
JP2025529999A (ja) 2025-09-09
EP4584407A1 (de) 2025-07-16
DE102022122831A1 (de) 2024-03-14
MX2025002757A (es) 2025-05-02

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