EP2963134B1 - Alliage de laiton à faible teneur en plomb - Google Patents

Alliage de laiton à faible teneur en plomb Download PDF

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Publication number
EP2963134B1
EP2963134B1 EP14176783.0A EP14176783A EP2963134B1 EP 2963134 B1 EP2963134 B1 EP 2963134B1 EP 14176783 A EP14176783 A EP 14176783A EP 2963134 B1 EP2963134 B1 EP 2963134B1
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EP
European Patent Office
Prior art keywords
alloy
lead
brass alloy
brass
cutting
Prior art date
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Application number
EP14176783.0A
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German (de)
English (en)
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EP2963134A1 (fr
Inventor
Jiade LI
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.)
Jiangxi Audy Brasswork Inc
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Jiangxi Audy Brasswork Inc
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Application filed by Jiangxi Audy Brasswork Inc filed Critical Jiangxi Audy Brasswork Inc
Priority to PL14176783T priority Critical patent/PL2963134T3/pl
Publication of EP2963134A1 publication Critical patent/EP2963134A1/fr
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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
    • C22C9/01—Alloys based on copper with aluminium as the next major constituent
    • 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 low-lead brass alloy.
  • Copper has excellent electrical conductivity and environmental friendliness, and bacteria harmful to the human can't survive on its surface.
  • Other elements are added into copper, so as to improve its performance.
  • lead has a destructive effect on the human health and ecological balance. It is also a trend around the world that there are increasing restrictions on the application of lead-containing alloy.
  • CN 101988164 A discloses a dezincification resistant brass alloy with low lead content, comprising less than 0.3 wt% of lead (Pb), 0.02 to 0.15 wt% of stibium (Sb), 0.02 to 0.25 wt% of arsenic (As), 0.4 to 0.8 wt% of aluminum (Al), 1 to 20 ppm of boron (B), and more than 97 wt% of copper (Cu) and zinc (Zn), wherein the copper content in the dezincification resistant brass alloy is 58 to 70 wt%.
  • the brass alloy of the invention can securely replace the alloy copper with a high lead content, and can completely meet the demands about restrictions on lead-containing products in the development of human society.
  • the inventors have proposed the following low-lead brass alloy.
  • a low-lead brass alloy (hereinafter referred to as the product 1), not in accordance with the present invention, comprises: by the total weight of the brass alloy, 62.5-63 wt% copper, 0.16-0.24 wt% lead, 0.55-0.7 wt% aluminum, and a balance of zinc.
  • the content of lead is reduced to 0.24 wt% or less, the content of copper is maintained at 62.5-63 wt%, and a trace amount of aluminum is added to increase cutting performance of the brass alloy.
  • aluminum has a higher tendency to be ionized on the surface of the alloy than zinc, and preferentially reacts with oxygen in a corrosive gas or solution to develop a dense protection film of aluminum oxide on the surface of the alloy, thus increasing corrosion resistance and dezincification resistance of the brass alloy in the severe environment.
  • aluminum can increase cast flowability of the alloy, so that the alloy exhibits a significant improvement in strength and hardness.
  • the content of aluminum is 0.55-0.7 wt% by the total weight of the brass alloy.
  • the product 1, not in accordance with the present invention further comprises: one or more elements selected from the group consisting of 0-0.02 wt% antimony, 0-0.2 wt% tin, 0-0.01 wt% magnesium, and 0.09-0.12 wt% arsenic by the total weight of the brass alloy. All of these elements can to a certain degree increase cutting performance of the brass alloy. The addition of antimony and tin can significantly increase strength of the alloy, and improve its plasticity and corrosion resistance. A trace amount of arsenic can increase dezincification resistance of the alloy. However, a high content of arsenic is not favorable, since it will decrease the thermal forgeability and squeezing performance of the alloy.
  • the above-mentioned product further comprises one or more elements selected from the group consisting of 0.0005-0.0009 wt% boron, 0.05-0.15 wt% iron, 0-0.15 wt% nickel, and 0-0.005 wt% zirconium by the total weight of the brass alloy.
  • Boron can increase corrosion resistance of the brass alloy, and can also prevent dezincification.
  • Iron can enhance toughness of the brass alloy.
  • Nickel can not only prevent the brass alloy from rusting, but also can form intermetallic compounds among metals in the alloy, which uniformly precipitate in the matrix, thus increasing wear resistance and strength of the alloy. Zirconium can help to refine grains, thus increasing casting performance of the brass alloy.
  • a low-lead brass alloy (hereinafter referred to as the product 2), not in accordance with the present invention, comprises: by the total weight of the brass alloy, 62.5-63 wt% copper, 0.16-0.24 wt% lead, two or more elements selected from the group consisting of 0.55-0.7 wt% aluminum, 0-0.02 wt% antimony, 0-0.2 wt% tin, and 0-0.01 wt% magnesium by the total weight of the brass alloy, and a balance of zinc.
  • Aluminum, antimony, tin, and magnesium are added on basis of the same reasons as the inventive product 1, and are added according to actual needs.
  • the product 2 further comprises two or more elements selected from the group consisting of 0.09-0.12 wt% arsenic, 0.0005-0.0009 wt% boron, 0.05-0.15 wt% iron, 0-0.15 wt% nickel, and 0-0.005 wt% zirconium by the total weight of the brass alloy.
  • Arsenic, boron, iron, nickel, and zirconium are added on basis of the same reasons as the inventive product 1, and are added according to actual needs.
  • a low-lead brass alloy (hereinafter referred to as the inventive product 3), in accordance with the invention, comprises: by the total weight of the brass alloy, 62.5-63 wt% copper, 0.16-0.24 wt% lead, 0-0.02 wt% antimony, 0-0.01 wt% magnesium, 0-0.2 wt% tin, 0.0005-0.0009 wt% boron, 0.55-0.7 wt% aluminum, 0.05-0.15 wt% iron, 0-0.15 wt% nickel, 0.09-0.12 wt% arsenic, 0-0.005 wt% zirconium, 0-0.01 wt% impurities, and a balance of zinc.
  • Antimony, magnesium, tin, boron, aluminum, iron, nickel, arsenic, and zirconium are added on basis of the same reasons as the product 1. In the inventive product 3, these elements are added simultaneously for the purpose of meeting needs for specific product performance.
  • the dezincification corrosion resistant performance measurement is performed according to AS-2345-2006 specification in the cast state, in which 12.8 g copper chloride is added into 1000C.C deionized water, and the object to be measured is placed in the resulting solution for 24 hr to measure a dezincification depth.
  • ⁇ indicates a dezincification depth of less than 300 ⁇ m; ⁇ indicates a dezincification depth between 300 ⁇ m and 400 ⁇ m; and ⁇ indicates a dezincification depth larger than 400 ⁇ m.
  • the cutting performance measurement is performed in the cast state, in which the same cutting tool is adopted with the same cutting speed and feed amount.
  • the cutting speed is 25 m/min (meter per minute)
  • the feed amount is 0.2 mm/r (millimeter per number of cutting edge)
  • the cutting depth is 0.5 mm
  • the measurement rod has a diameter of 20 mm
  • C36000 alloy is taken as a reference.
  • the relative cutting rate is derived by measuring the cutting resistance.
  • the relative cutting rate cutting resistance of C36000 alloy / cutting resistance of the sample.
  • ⁇ indicates a relative cutting rate larger than 85%; and ⁇ indicates a relative cutting rate larger than 70%.
  • Both the tensile strength measurement and the elongation rate measurement, as used herein, are performed in the cast state at room temperature as an elongation measurement.
  • the reference sample is a lead-containing brass with the same state and specification, i.e., C36000 alloy.
  • Table 1 lists 15 different constituents for the low-lead brass alloy, each constituent being in the unit of weight percentage (wt%). In particular, no. 7 and 15 of the embodiments illustrated in Table 1 are in accordance with the scope of the present invention. The remaining embodiments illustrated in Table 1 are not in accordance with the scope of the present invention. Table 1 No.
  • Measurements about cutting performance, dezincification corrosion resistant performance, tensile strength, and elongation rate are performed on alloys with the above constituents in the cast state at room temperature, and the reference sample is a lead-containing brass with the same state and specification, i.e., C36000 alloy.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Domestic Plumbing Installations (AREA)
  • Conductive Materials (AREA)

Claims (1)

  1. Alliage de laiton à faible teneur en plomb, caractérisé en ce qu'il comprend : par rapport au poids total de l'alliage de laiton, 62,5 à 63 % en poids de cuivre, 0,16 à 0,24 % en poids de plomb, 0 à 0,02 % en poids d'antimoine, 0 à 0,01 % en poids de magnésium, 0 à 0,2 % en poids d'étain, 0,0005 à 0,0009 % en poids de bore, 0,55 à 0,7 % en poids d'aluminium, 0,05 à 0,15 % en poids de fer, 0 à 0,15 % en poids de nickel, 0,09 à 0,12 % en poids d'arsenic, 0 à 0,005 % en poids de zirconium, 0 à 0,01 % en poids d'impuretés et un équilibre de zinc.
EP14176783.0A 2014-06-23 2014-07-11 Alliage de laiton à faible teneur en plomb Active EP2963134B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14176783T PL2963134T3 (pl) 2014-06-23 2014-07-11 Niskoołowiowy stop mosiężny

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410282838.4A CN104032176B (zh) 2014-06-23 2014-06-23 低铅黄铜合金

Publications (2)

Publication Number Publication Date
EP2963134A1 EP2963134A1 (fr) 2016-01-06
EP2963134B1 true EP2963134B1 (fr) 2018-05-23

Family

ID=51167766

Family Applications (1)

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EP14176783.0A Active EP2963134B1 (fr) 2014-06-23 2014-07-11 Alliage de laiton à faible teneur en plomb

Country Status (11)

Country Link
US (1) US20150368758A1 (fr)
EP (1) EP2963134B1 (fr)
JP (1) JP6069752B2 (fr)
KR (1) KR20150146347A (fr)
CN (1) CN104032176B (fr)
AU (1) AU2014204430B1 (fr)
DK (1) DK2963134T3 (fr)
ES (1) ES2680343T3 (fr)
PL (1) PL2963134T3 (fr)
PT (1) PT2963134T (fr)
TW (1) TWI577811B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104745863B (zh) * 2015-04-08 2017-09-08 九牧厨卫股份有限公司 一种适用于铸造的低铅耐脱锌黄铜合金
CN105543548A (zh) * 2015-12-22 2016-05-04 路达(厦门)工业有限公司 一种铸造用低成本无铅抗脱锌黄铜合金
CN107385273B (zh) * 2017-07-07 2019-03-01 路达(厦门)工业有限公司 一种铸造用环保黄铜合金及其制造方法
DE102017118386A1 (de) * 2017-08-11 2019-02-14 Grohe Ag Kupferlegierung, Verwendung einer Kupferlegierung, Sanitärarmatur und Verfahren zur Herstellung einer Sanitärarmatur
CN109468488A (zh) * 2018-12-24 2019-03-15 广州海鸥住宅工业股份有限公司 低铅抗脱锌黄铜合金及其制备方法

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE60010729T2 (de) 1999-08-26 2005-05-12 Tour & Andersson Ab Entzinkungsresistente spritzguss-messinglegierung
US20110064602A1 (en) 2009-09-17 2011-03-17 Modern Islands Co., Ltd. Dezincification-resistant copper alloy
CN101988164A (zh) 2009-08-06 2011-03-23 摩登岛股份有限公司 低铅的抗脱锌铜合金
CN103469004A (zh) 2013-08-14 2013-12-25 永和流体智控股份有限公司 一种无铅铜合金材料

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JPH111736A (ja) * 1997-06-09 1999-01-06 Chuetsu Gokin Chuko Kk 加熱装置用黄銅合金材料
JP4296344B2 (ja) * 2003-03-24 2009-07-15 Ｄｏｗａメタルテック株式会社 銅合金材
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JP3964930B2 (ja) * 2004-08-10 2007-08-22 三宝伸銅工業株式会社 結晶粒が微細化された銅基合金鋳物
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US20110064602A1 (en) 2009-09-17 2011-03-17 Modern Islands Co., Ltd. Dezincification-resistant copper alloy
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Also Published As

Publication number Publication date
PT2963134T (pt) 2018-10-08
JP2016008354A (ja) 2016-01-18
PL2963134T3 (pl) 2018-10-31
TW201600618A (zh) 2016-01-01
KR20150146347A (ko) 2015-12-31
AU2014204430B1 (en) 2015-12-10
DK2963134T3 (en) 2018-08-27
EP2963134A1 (fr) 2016-01-06
JP6069752B2 (ja) 2017-02-01
US20150368758A1 (en) 2015-12-24
CN104032176A (zh) 2014-09-10
CN104032176B (zh) 2015-03-11
ES2680343T3 (es) 2018-09-06
TWI577811B (zh) 2017-04-11

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