US20130183194A1 - Copper Alloy - Google Patents

Copper Alloy Download PDF

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Publication number
US20130183194A1
US20130183194A1 US13/823,584 US201113823584A US2013183194A1 US 20130183194 A1 US20130183194 A1 US 20130183194A1 US 201113823584 A US201113823584 A US 201113823584A US 2013183194 A1 US2013183194 A1 US 2013183194A1
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US
United States
Prior art keywords
copper
recited
alloy
alloy based
proportion
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.)
Abandoned
Application number
US13/823,584
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English (en)
Inventor
Thomas Helmenkamp
Dirk Rode
Uwe Quadfasel
Hark Schulze
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.)
KME Special Products GmbH and Co KG
Original Assignee
KME Germany GmbH
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 KME Germany GmbH filed Critical KME Germany GmbH
Publication of US20130183194A1 publication Critical patent/US20130183194A1/en
Assigned to KME GERMANY GMBH & CO. KG reassignment KME GERMANY GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HELMENKAMP, THOMAS, QUADFASEL, UWE, RODE, DIRK, SCHULZE, HARK
Abandoned 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
    • C22C9/05—Alloys based on copper with manganese 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
    • 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

Definitions

  • the present invention relates to a copper alloy, particularly a lead-free and tellurium-free copper alloy, as well as semifinished products made of such a copper alloy.
  • copper is an indispensable material because of its natural qualities. Especially when materials are required having the highest electrical and thermal conductivity, copper and copper alloys are of great importance.
  • the use of pure copper brings on difficulties if parts are to be processed in a metal-cutting manner.
  • the high toughness of copper which is particularly valued in chipless shaping, proves to be a disadvantageous material property in this instance. The cause for this is long chip formation, which impedes the operating sequence during drilling and turning, and leads to large wear of the cutting lips.
  • pure copper is normally workable or processable only at uneconomically high costs in time, personnel and tooling.
  • Machinable copper materials having admixtures of lead, bismuth, sulfur or tellurium.
  • lead, bismuth, sulfur or tellurium As early as in U.S. Pat. No. 1,959,509 the favorable influence of alloying bismuth on the machinability of copper alloys was explained. The advantageous properties of tellurium in copper alloys may be seen in U.S. Pat. No. 2,027,807.
  • Lead and bismuth act as chip breakers in metallic form, sulfur and tellurium, on the other hand, act as an intermetallic phase in the form of copper sulfide (Cu 2 S) or copper telluride (Cu 2 Te).
  • Cu 2 S copper sulfide
  • Cu 2 Te copper telluride
  • the low melting points of lead and bismuth restrict the hot ductility considerably, for instance, by extrusion, so that economical processability on conventional production devices cannot be taken for granted, or only in a limited way.
  • a copper alloy is proposed, in accordance with the present invention, based on copper having the addition of manganese and sulfur, as well as accompanying elements, which can do without lead or tellurium, but demonstrates good machinability.
  • the copper alloy consists of copper, which has as alloying components 0.05 to 0.80 wt. % manganese (Mn), 0.10 to 0.80 wt. % sulfur (S), and optionally one or more elements selected from the group made up of 0.002 to 0.05 wt. % phosphorus (P), 0.01 to 0.05 wt. % Chromium (Cr), 0.01 to 0.5 wt. % aluminum (Al), 0.01 to 0.5 wt. % magnesium (Mg), besides unavoidable impurities.
  • a mixed phase consisting of copper sulfide (Cu 2 S) and manganese sulfide (MnS) acts as chip breaker in the CuSMn alloy according to the present invention.
  • the manganese proportion amounts to 0.10 to 0.20 wt. %. Also preferred, there is a sulfur proportion, that is between 0.20 to 0.60 wt. %.
  • the object on which the present invention is based is furthermore attained by an alloy based on copper according to claims 9 - 12 . It consists of 0.30 to 1.50 wt. % calcium (Ca), optionally one or more elements selected from the group which consists of 0.005 to 0.05 wt. % manganese (Mn), 0.005 to 0.05 wt. % sulfur (S), 0.002 to 0.05 wt. % phosphorus (P), 0.01 to 0.5 wt. % chromium (Cr), 0.01 to 0.5 wt. % aluminum (Al), 0.01 to 0.5 wt. % magnesium (Mg), as well as the remainder copper (Cu) and unavoidable impurities.
  • the calcium proportion in the previous copper alloy is preferably between 0.5 to 1.0 wt. %.
  • the forming eutectic phase Cu 5 Ca acts as a chip breaker.
  • Phosphorus is used as a deoxidizer, which binds the free oxygen dissolved in the melt to itself, and thus avoids gas bubbles (hydrogen disease) and the oxidation of alloy components. Moreover, phosphorus is added to improve the flowing properties of the copper alloy during casting.
  • Aluminum increases the hardness and yield strength without reducing the toughness.
  • Aluminum is an element which improves the strength, machinability and resistance to abrasion, as well as the resistance to oxidation at high temperatures.
  • Chromium and manganese are used to improve the resistance to oxidation at high temperatures. In this instance, particularly good results are obtained if they are mixed with aluminum, so as to achieve a synergy effect.
  • the two copper materials CuSMn and CuCa proposed in the present invention have a machinability which is equal to or better than that of CuSP.
  • a machinability index of 90% was ascertained for CuSMn, 86% for CuCa and 76 and 79% for the reference materials CuTeP and CuSP.
  • the materials have an electric conductivity that is between 35 and 55 MS/m, particularly in a range of 48 to 53 MS/m.
  • the copper alloys proposed in the present invention are free from toxic alloying elements and are cost-effective, since the alloying elements are available cost-effectively.
  • a special criterion of the two proposed copper alloys is that workability using conventional production and processing machines is possible, and in particular, the alloys have both a sufficient cold-formability and also a very good hot ductility.
  • CuSMn, CuCa and the reference materials CuTeP and CuSP respectively were melted and cast to extrusion billets in a continuous casting method.
  • the composition of the materials is reproduced in Table 1.
  • the composition of CuSMn corresponds to claims 1 - 8
  • CuCa fulfills claims 9 - 12 .
  • the composition of the reference materials CuTeP and CuSP corresponds to the specifications of EN and ASTM.
  • the continuously cast round billets were extruded in an extruding press at a heating-up temperature of 850° C. without problems to bars and were subsequently drawn at a cross sectional reduction of 10 to 15% to a final diameter of 35 mm.
  • FIG. 1 shows the drilling chips from the machinability investigations.
  • the somewhat longer helical chip pieces occur only sporadically.
  • the very thorough and effortful machinability investigations have shown that the materials according to the present invention are at least equivalent in machinability to reference materials CuSP and CuTeP that have been available up to now, or even have slight advantages.
  • each alloying element aluminum (Al), calcium (Ca), cobalt (Co), chromium (Cr), iron (Fe), magnesium (Mg), manganese (Mn), molybdenum (Mo), nickel (Ni), tin (Sn) and zinc (Zn) was tested in combination with sulfur (S) and calcium (Ca) as a single addition to copper with respect to the achievable electrical conductivity and machinability.
  • the well-established materials CuSP and CuTeP were used as comparative samples for the machinability tests.
  • Qualitatively valued was the shape of the chips during the drilling of 3 mm holes and the appearance of drill fractures.
  • the desired material properties or property combinations were achieved by alloying manganese, specifically in a proportion of 0.05 to 0.80 wt. %, preferably 0.10 to 0.30 wt. %, particularly 0.10 to 0.20 wt. %, as well as sulfur in a proportion of 0.10 to 0.80 wt. %, particularly 0.20 to 0.60 wt. %.
  • an alloy based on copper which contains as an alloy component calcium having a proportion of 0.30 to 1.50 wt. %, preferably between 0.5 and 1.0 wt. %.
  • the two copper materials CuSMn and CuCa that were pointed out have the aforementioned independent chip-breaking phases, namely the mixed phase consisting of Cu 2 S and MnS and the eutectic phase Cu 5 Ca.

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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)
  • Forging (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
US13/823,584 2010-10-08 2011-08-16 Copper Alloy Abandoned US20130183194A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010038060.1 2010-10-08
DE201010038060 DE102010038060A1 (de) 2010-10-08 2010-10-08 Kupferlegierung
PCT/DE2011/001598 WO2012062248A2 (de) 2010-10-08 2011-08-16 Kupferlegierung

Publications (1)

Publication Number Publication Date
US20130183194A1 true US20130183194A1 (en) 2013-07-18

Family

ID=45606890

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/823,584 Abandoned US20130183194A1 (en) 2010-10-08 2011-08-16 Copper Alloy

Country Status (8)

Country Link
US (1) US20130183194A1 (de)
EP (1) EP2625300B1 (de)
JP (1) JP2013544962A (de)
BR (1) BR112013008521A2 (de)
DE (1) DE102010038060A1 (de)
MX (1) MX2012011929A (de)
PL (1) PL2625300T3 (de)
WO (1) WO2012062248A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115786753A (zh) * 2023-02-02 2023-03-14 泰州泰锦合金材料有限公司 一种含稀土金属的碲铜合金材料及其制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE1450094A1 (sv) 2014-01-30 2015-07-31 Arsenikfri mässing med förbättrad avzinkningshärdighet och skärbarhet

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959509A (en) 1930-06-14 1934-05-22 Lucius Pitkin Inc Copper base alloy
US2027807A (en) 1932-05-13 1936-01-14 Chase Companies Inc Copper base alloy
DE1558707A1 (de) * 1967-09-12 1970-04-23 Ver Deutsche Metallwerke Ag Aus dem Schmelzfluss oder durch Sintern hergestellte Kupferlegierungen mit 0,005 bis 2% Schwefel
JPS5344136B2 (de) * 1974-12-23 1978-11-27
JPS5675541A (en) * 1979-11-22 1981-06-22 Sumitomo Light Metal Ind Ltd Copper alloy for water or hot water supply piping material and heat exchanger tube material
JPS5760043A (en) * 1980-09-30 1982-04-10 Furukawa Electric Co Ltd:The Electrically conductive copper alloy with corrosion and heat resistance
JPS5852453A (ja) * 1981-09-21 1983-03-28 Furukawa Electric Co Ltd:The 自動車用ラジエ−タ−のフイン用銅合金
JPH06184672A (ja) * 1992-12-18 1994-07-05 Mitsubishi Materials Corp 給水給湯用耐孔食性銅合金配管
US20040115089A1 (en) * 1999-07-02 2004-06-17 Berkenhoff Gmbh. Weld-solder filler
JP2005171311A (ja) * 2003-12-11 2005-06-30 Nissan Motor Co Ltd 熱間鍛造用非調質クランクシャフト鋼

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115786753A (zh) * 2023-02-02 2023-03-14 泰州泰锦合金材料有限公司 一种含稀土金属的碲铜合金材料及其制备方法

Also Published As

Publication number Publication date
WO2012062248A3 (de) 2013-07-25
BR112013008521A2 (pt) 2016-07-12
PL2625300T3 (pl) 2017-04-28
EP2625300A2 (de) 2013-08-14
JP2013544962A (ja) 2013-12-19
WO2012062248A2 (de) 2012-05-18
MX2012011929A (es) 2013-02-07
EP2625300B1 (de) 2016-12-21
DE102010038060A1 (de) 2012-04-12
WO2012062248A8 (de) 2012-11-29

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AS Assignment

Owner name: KME GERMANY GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HELMENKAMP, THOMAS;RODE, DIRK;QUADFASEL, UWE;AND OTHERS;REEL/FRAME:031094/0136

Effective date: 20130525

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION