EP1502965A1 - Free cutting brass alloy - Google Patents

Free cutting brass alloy Download PDF

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Publication number
EP1502965A1
EP1502965A1 EP04466021A EP04466021A EP1502965A1 EP 1502965 A1 EP1502965 A1 EP 1502965A1 EP 04466021 A EP04466021 A EP 04466021A EP 04466021 A EP04466021 A EP 04466021A EP 1502965 A1 EP1502965 A1 EP 1502965A1
Authority
EP
European Patent Office
Prior art keywords
weight
free cutting
max
brass alloy
cutting brass
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.)
Withdrawn
Application number
EP04466021A
Other languages
German (de)
English (en)
French (fr)
Inventor
Antonin Strachovsky
Jiri Faltus
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.)
Kovohute Celakovice AS
VUK Panenske Brezany sro
Original Assignee
Kovohute Celakovice AS
VUK Panenske Brezany sro
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.)
Filing date
Publication date
Application filed by Kovohute Celakovice AS, VUK Panenske Brezany sro filed Critical Kovohute Celakovice AS
Publication of EP1502965A1 publication Critical patent/EP1502965A1/en
Withdrawn legal-status Critical Current

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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 concerns a free cutting brass alloy for heat and could moulding, primarily for manufacturing of rods by cold drawing.
  • the current free cutting brasses also known as screw brasses, are mostly Cu-Zn-Pb alloys and usually contain 57,0 to 60,0 % by weight of copper, 1,0 to 4,5 % by weight of lead and zinc residue. From these alloys are manufactured rods, tubes, profiles and wires by hot working. During the subsequent cutting operation, a fragile chip occurs due to the presence of lead.
  • the brass contains 57,0 to 60,0 % by weight of copper, 0,5 to 2,5 % by weight of bismuth and zinc residue. It may also contain lead, namely either as a tramp element or an alloying element when together with bismuth creates an addition to break a chip. Depending on the required need and purpose it may further also contain 0,15 to 0,3 % by weight of phosphor, incidentally a maximum of 0,1 % by weight of aluminum, a max. of 0,4 % by weight of iron, a max. of 0,3 % by weight of nickel, a max. of 0,1 % by weight of tin or a max. of 0,2 % by weight of other tramp elements on the whole.
  • neither this known workable brass fulfills all requirements, especially from the material structure and properties point of view resulting from requirements e.g. in automobile industry. It is not appropriate for other applications where significantly higher contents of copper and other alloying and tramp elements are required, namely because of its better drawability.
  • the mentioned above disadvantages of the current technology have been largely eliminated by use of free cutting brass alloy on the basis of Cu-Zn-Bi alloy, designated especially for cold drawing, according to the invention.
  • the principle of the invention consists in the fact, that the free cutting alloy brass contains 55,0 % to 75,0 % by weight of copper, 0,5 to 4,0 % by weight of bismuth as an exclusive addition, chip-breaking addition, zinc residue and incidental tramp elements and impurities.
  • the free cutting brass alloy according to the invention is a one-phase brass. It consists of only alpha phase with all positive implications on its properties and can be widely applied in various areas in industry.
  • the principle of the invention lies further in the fact that the fee cutting brass alloy may also contain lead.
  • lead is here only as a tramp element in the quantity of 0,001 to 0,2 % by weight.
  • An alternative modification of the free cutting brass alloy according to the invention where there is a requirement on a higher corrosion resistance, may further contain 0,05 to 0,3 % by weight of phosphor.
  • the free cutting brass alloy may also contain 0,01 to 3,0 % by weight of silicon, incidentally 0,01 to 2,0 % by weight of tin, a max. of 0,1 % by weight of aluminum, a max. of 0,4 % by weight of iron, a max. of 0,3 % by weight of nickel and a max. of 0,5 % by weight of other tramp elements on the whole.
  • the advantage of the free cutting brass alloy according to the invention is the fact that although this brass is unlike the current brasses practically leadless one, its workability is practically equal to common alloys Cu-Zn-Pb, such as e.g. CuZn40Pb2. At the same time, in contrast with other known so called leadless workable brasses, its drawability has been significantly improved while preserving its good formability. It can be processed by common way, such as casting, extrusion, rolling and unrolling of extrusions, cold drawing, straightening, sanding, drop forging or hot forging.
  • the free cutting brass alloy contains 70,47 % by weight of copper, 1,24 % by weight of bismuth and zinc residue.
  • the free cutting brass alloy contains 60, 97 % by weight of copper, 1,51 % by weight of bismuth, 0,009 % by weight of tin, 0,071 % by weight of lead, 0,003 % by weight of aluminum, 0,006 % by weight of iron, 0,022 % by weight of nickel, 0,018 % by weight of phosphor, less than 0,01 % by weight of silicon, zinc residue.
  • the free cutting brasses were manufactured in a channel-type furnace.
  • the both casts were prepared from copper Cu99,5, zinc Zn99,5, bismuth Bi99,9 and foundry alloy CuP10.
  • ingots with a diameter of 184 mm were cast by stationary casting into copper water-cooled moulds.
  • dimension stock in a length of 770 mm were then prepared and directly extruded on extrusions in a diameter of 18,5 mm.
  • the extrusion was conducted at a temperature of 720 to 740 °C at a leaving velocity of 3 to 4,5 m/min..
  • extrusions were coiled into circles in a diameter of 1,2 m. These extrusions were then straightened on prismatic cylinders, then cold drawn into a diameter of 18,0 mm and straightened and cut into the required length of 3,0 m.
  • the free cutting brass alloy according to the invention can be widely used primarily for forgings, solid or hollow rods and other profiles that are further designed for cutting operation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)
  • Conductive Materials (AREA)
EP04466021A 2003-08-01 2004-07-29 Free cutting brass alloy Withdrawn EP1502965A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ20032094A CZ20032094A3 (cs) 2003-08-01 2003-08-01 Automatová mosaz
CZ20032094 2003-08-01

Publications (1)

Publication Number Publication Date
EP1502965A1 true EP1502965A1 (en) 2005-02-02

Family

ID=33520395

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04466021A Withdrawn EP1502965A1 (en) 2003-08-01 2004-07-29 Free cutting brass alloy

Country Status (2)

Country Link
EP (1) EP1502965A1 (cs)
CZ (1) CZ20032094A3 (cs)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007034571A1 (en) * 2005-09-22 2007-03-29 Sanbo Shindo Kogyo Kabushiki Kaisha Free-cutting copper alloy containing very low lead
CN102206772A (zh) * 2010-03-30 2011-10-05 Lclip有限公司 黄铜合金
CN102329981A (zh) * 2011-09-22 2012-01-25 安徽精诚铜业股份有限公司 灯头用高拉伸性能黄铜带及其生产工艺
CN102477498A (zh) * 2010-11-26 2012-05-30 摩登岛股份有限公司 易切削的环保黄铜合金
CN102658452A (zh) * 2011-11-17 2012-09-12 中铝洛阳铜业有限公司 一种铜钢覆合用铜带加工工艺方法
CN103045903A (zh) * 2013-01-16 2013-04-17 苏州金仓合金新材料有限公司 一种用铋铝锡单向切削取代铅元素的黄铜合金棒及制备
CN103114222A (zh) * 2013-03-14 2013-05-22 上海天申铜业集团有限公司 一种无铅水表及其表壳的铸造方法
CN103710567A (zh) * 2013-12-17 2014-04-09 江西鸥迪铜业有限公司 一种易切削镍黄铜合金及其制备方法
CN109022844A (zh) * 2018-08-02 2018-12-18 济南大学 锌-铜合金中ε相的变质剂及变质方法
CN109266899A (zh) * 2018-11-16 2019-01-25 宁波金田铜业(集团)股份有限公司 一种环保低抗脱锌值dzr铜锭及其制备方法
CN112941363A (zh) * 2013-06-12 2021-06-11 株式会社栗本铁工所 水管部件用铜合金
CN116623037A (zh) * 2023-06-12 2023-08-22 宁波金田铜业(集团)股份有限公司 一种无铅易切削抗应力开裂的黄铜棒材及其制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ306429B6 (cs) * 2015-10-07 2017-01-18 Comtes Fht A.S. Obrobitelná mosaz se sníženým obsahem olova vhodná pro tváření válcováním za studena

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457478A1 (en) * 1990-05-15 1991-11-21 AT&T Corp. Machinable lead-free wrought copper-based alloys
US5637160A (en) * 1991-03-01 1997-06-10 Olin Corporation Corrosion-resistant bismuth brass
EP1038981A1 (en) * 1998-10-09 2000-09-27 Sambo Copper Alloy Co., Ltd Free-cutting copper alloy
JP2001059123A (ja) * 1999-08-24 2001-03-06 Hitachi Alloy Kk 無鉛快削性銅合金材
JP2002003967A (ja) * 2000-06-26 2002-01-09 Sumitomo Light Metal Ind Ltd 耐脱亜鉛腐食性に優れた無鉛快削黄銅およびその製造方法
JP2002030364A (ja) * 2000-07-19 2002-01-31 Sumitomo Light Metal Ind Ltd 高強度快削黄銅
JP2003277855A (ja) * 2002-03-22 2003-10-02 San-Etsu Metals Co Ltd 無鉛快削黄銅合金材及びその製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457478A1 (en) * 1990-05-15 1991-11-21 AT&T Corp. Machinable lead-free wrought copper-based alloys
US5637160A (en) * 1991-03-01 1997-06-10 Olin Corporation Corrosion-resistant bismuth brass
EP1038981A1 (en) * 1998-10-09 2000-09-27 Sambo Copper Alloy Co., Ltd Free-cutting copper alloy
JP2001059123A (ja) * 1999-08-24 2001-03-06 Hitachi Alloy Kk 無鉛快削性銅合金材
JP2002003967A (ja) * 2000-06-26 2002-01-09 Sumitomo Light Metal Ind Ltd 耐脱亜鉛腐食性に優れた無鉛快削黄銅およびその製造方法
JP2002030364A (ja) * 2000-07-19 2002-01-31 Sumitomo Light Metal Ind Ltd 高強度快削黄銅
JP2003277855A (ja) * 2002-03-22 2003-10-02 San-Etsu Metals Co Ltd 無鉛快削黄銅合金材及びその製造方法

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 03 29 March 1996 (1996-03-29) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 20 10 July 2001 (2001-07-10) *
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 05 3 May 2002 (2002-05-03) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7883589B2 (en) 2005-09-22 2011-02-08 Mitsubishi Shindoh Co., Ltd. Free-cutting copper alloy containing very low lead
WO2007034571A1 (en) * 2005-09-22 2007-03-29 Sanbo Shindo Kogyo Kabushiki Kaisha Free-cutting copper alloy containing very low lead
CN102206772A (zh) * 2010-03-30 2011-10-05 Lclip有限公司 黄铜合金
CN102477498A (zh) * 2010-11-26 2012-05-30 摩登岛股份有限公司 易切削的环保黄铜合金
CN102329981B (zh) * 2011-09-22 2013-07-31 安徽精诚铜业股份有限公司 灯头用高拉伸性能黄铜带及其生产工艺
CN102329981A (zh) * 2011-09-22 2012-01-25 安徽精诚铜业股份有限公司 灯头用高拉伸性能黄铜带及其生产工艺
CN102658452A (zh) * 2011-11-17 2012-09-12 中铝洛阳铜业有限公司 一种铜钢覆合用铜带加工工艺方法
CN102658452B (zh) * 2011-11-17 2014-07-16 中铝洛阳铜业有限公司 一种铜钢覆合用铜带加工工艺方法
CN103045903A (zh) * 2013-01-16 2013-04-17 苏州金仓合金新材料有限公司 一种用铋铝锡单向切削取代铅元素的黄铜合金棒及制备
CN103045903B (zh) * 2013-01-16 2015-04-22 苏州金仓合金新材料有限公司 一种用铋铝锡单向切削取代铅元素的黄铜合金棒及制备
CN103114222A (zh) * 2013-03-14 2013-05-22 上海天申铜业集团有限公司 一种无铅水表及其表壳的铸造方法
CN103114222B (zh) * 2013-03-14 2014-10-22 上海天申铜业集团有限公司 一种无铅水表表壳的铸造方法
CN112941363A (zh) * 2013-06-12 2021-06-11 株式会社栗本铁工所 水管部件用铜合金
CN103710567A (zh) * 2013-12-17 2014-04-09 江西鸥迪铜业有限公司 一种易切削镍黄铜合金及其制备方法
CN109022844A (zh) * 2018-08-02 2018-12-18 济南大学 锌-铜合金中ε相的变质剂及变质方法
CN109266899A (zh) * 2018-11-16 2019-01-25 宁波金田铜业(集团)股份有限公司 一种环保低抗脱锌值dzr铜锭及其制备方法
CN116623037A (zh) * 2023-06-12 2023-08-22 宁波金田铜业(集团)股份有限公司 一种无铅易切削抗应力开裂的黄铜棒材及其制备方法

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Publication number Publication date
CZ294891B6 (cs) 2005-04-13
CZ20032094A3 (cs) 2005-04-13

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