EP1559802A1 - Bleifreie Automatenkupferlegierung - Google Patents

Bleifreie Automatenkupferlegierung Download PDF

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Publication number
EP1559802A1
EP1559802A1 EP05075421A EP05075421A EP1559802A1 EP 1559802 A1 EP1559802 A1 EP 1559802A1 EP 05075421 A EP05075421 A EP 05075421A EP 05075421 A EP05075421 A EP 05075421A EP 1559802 A1 EP1559802 A1 EP 1559802A1
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Prior art keywords
remainder
alloy
machinability
alloys
silicon
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EP05075421A
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English (en)
French (fr)
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EP1559802B1 (de
Inventor
Keiichiro Sambo Copper Alloy Co. Ltd OISHI
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Mitsubishi Shindoh Co Ltd
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Sambo Copper Alloy Co Ltd
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    • 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
    • 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 present invention relates to lead-free, free- cutting copper alloys.
  • bronze alloys such as the one under JIS designation H5111 BC6 and brass alloys such as the ones under JIS designations H3250-C3604 and C3771.
  • Those alloys are enhanced in machinability by the addition of 1.0 to 6.0 wt% of lead and provide an industrially satisfactory machinability. Because of their excellent machinability, those lead-contained copper alloys have been an important basic material for a variety of articles such as city water faucets, water supply/drainage metal fittings and valves.
  • lead contained therein is an environment pollutant harmful to humans. That is, the lead-containing alloys pose a threat to human health and environmental hygiene because lead is contained in metallic vapor that is generated in the steps of processing those alloys at high temperatures such as melting and casting and there is also concern that lead contained in the water system metal fittings, valves and others made of those alloys will dissolve out into drinking water.
  • the cutting works, forgings, castings and others include city water faucets, water supply/drainage metal fittings, valves, stems, hot water supply pipe fittings, shaft and heat exchanger parts.
  • a lead-free copper alloy composition which comprises 69 to 79 wt% copper and the remaining wt% zinc
  • ⁇ (gamma) and the ⁇ (kappa) phases as set out in claim 1 hereinafter.
  • uses as set out in claim 2 hereinafter The uses of the invention are carried out in the manufacture of the following alloys:
  • the first to twelfth alloys contain machinability improving elements such as silicon and have an excellent machinability because of the addition of such elements.
  • the alloys with a high copper content which have great amounts of other phases, mainly kappa phase, than alpha, beta, gamma and delta phases can further improve in machinability in a heat treatment.
  • the kappa phase turns to a gamma phase.
  • the gamma phase finely disperses and precipitates to further enhance the machinability.
  • the alloys with a high content of copper are high in ductility of the matrix and low in absolute quantity of gamma phase, and therefore are excellent in cold workability.
  • the aforesaid heat treatment is very useful.
  • those which are high in copper content with gamma phase in small quantities and kappa phase in large quantities (hereinafter referred to as the "high copper content alloy") undergo a change in phase from the kappa phase to the gamma phase in a heat treatment.
  • the gamma phase is finely dispersed and precipitated, and the machinability is improved.
  • the materials are often force-air-cooled or water cooled depending on the forging conditions, productivity after hot working (hot extrusion, hot forging etc.), working environment and other factors.
  • the low copper content alloy those with a low content of copper (hereinafter called the low copper content alloy”) are rather low in the content of the gamma phase and contain beta phase.
  • the beta phase changes into gamma phase, and the gamma phase is finely dispersed and precipitated, whereby the machinability is improved.
  • Fig. 1 shows perspective views of cuttings formed in cutting a round bar of copper alloy by lathe.
  • 13003 is an alloy test piece obtained by heat-treating an extruded test piece with the same composition as first alloy No. 1007 under the same conditions as for No. 13001 - for 30 minutes at 580 ⁇ C.
  • No. 13004 is an alloy test piece obtained by heat-treating an extruded test piece with the same composition as No. 13007 under the same conditions as for 13002 - for two hours at 450 ⁇ C.
  • No. 13005 is an alloy test piece obtained by heat-treating an extruded test piece with the same composition as first alloy No. 1008 under the same conditions as for No. 13001 - for 30 minutes at 580 ⁇ C.
  • No. 13006 is an alloy test piece obtained by heat-treating an extruded test piece with the same composition as No. 1008 and heat-treated under the same conditions as for 13002 - for two hours at 450 ⁇ C.
  • 14005 corresponds to the alloy "JIS C 6191.” This aluminum bronze is the most excellent of the expanded copper alloys under the JIS designations with regard to strength and wear resistance.
  • No. 14006 corresponds to the naval brass alloy "JIS C 4622” and is the most excellent of the expanded copper alloys under the JIS designations with regard to corrosion resistance.
  • the chips from the cutting work were examined and classified into four forms (A) to (D) as shown in Fig. 1.
  • the results are enumerated in Table 38 to Table 66.
  • the chips in the form of a spiral with three or more windings as (D) in Fig. 1 are difficult to process, that is, recover or recycle, and could cause trouble in cutting work as, for example, getting tangled with the tool and damaging the cut metal surface.
  • chips in the form of a fine needle as (A) in Fig. 1 or in the form of an arc as (B) will not present such problems as mentioned above and are not bulky as the chips in (C) and (D) and easy to process. But fine chips as (A) still could creep into the sliding surfaces of a machine tool such as a lathe and cause mechanical trouble, or could be dangerous because they could stick into the worker's finger, eye or other body parts.
  • the surface condition of the cut metal surface was checked after cutting work.
  • the results are shown in Table 38 to Table 66.
  • the commonly used basis for indication of the surface roughness is the maximum roughness (Rmax). While requirements are different depending on the application field of brass articles, the alloys with Rmax ⁇ 10 microns are generally considered excellent in machinability. The alloys with 10 microns ⁇ Rmax ⁇ 15 microns are judged as industrially acceptable, while those with Rmax ⁇ 15 microns are taken as poor in machinability.
  • the following alloys are all equal to the conventional lead- contained alloys Nos. 14001 to 14003 in machinability: first alloys Nos. 1001 to 1008, second alloys Nos. 2001 to 2011, third alloys Nos. 3001 to 3012, fourth alloys Nos. 4001 to 4049, fifth alloys Nos. 5001 to 5020, sixth alloys Nos. 6001 to 6105, seventh alloys Nos. 7001 to 7030, eighth alloys Nos. 8001 to 8147, ninth alloys Nos. 9001 to 9005, tenth alloys Nos. 10001 to 10008, eleventh alloys Nos. 11001 to 11007, twelfth alloys Nos.
  • those alloys are favourably compared not only with the conventional alloys Nos. 14004 to 14006 with a lead content of not higher than 0.1 wt% but also Nos. 14001 to 14003 which contain large quantities of lead.
  • test pieces two test pieces, first and second test pieces, in the same shape 15 mm in outside diameter and 25 mm in length were cut out of each extruded test piece obtained as described above.
  • the first test piece was held for 30 minutes at 700° ⁇ C, and then compressed 70 percent in the direction of axis to reduce the length from 25 mm to 7.5 mm.
  • the surface condition after the compression 700°C deformability
  • the results are given in Table 38 to Table 66.
  • the evaluation of deformability was made by visually checking for cracks on the side of the test piece. In Table 38 to Table 66, the test pieces with no cracks found are marked "o", those with small cracks are indicated in "_” and those with large cracks are represented by a symbol "x".
  • the second test pieces were put to a tensile test by the commonly practised test method to determine the tensile strength, N/mm 2 and elongation, %.
  • the first to thirteenth alloys are equal to or superior to the conventional alloys Nos. 14001 to 14004 and No. 14006 in hot workability and mechanical properties and are suitable for industrial use.
  • the seventh and eighth alloys in particular have the same level of mechanical properties as the conventional alloy No. 14005, the aluminum bronze which is the most excellent in strength of the expanded copper alloys under the JIS designations, and thus have understandably a prominent high strength feature.
  • the first to six and ninth to thirteenth alloys were put to dezincification and stress corrosion cracking tests in accordance with the test methods specified under "ISO 6509” and “JIS H 3250" respectively to examine the corrosion resistance and resistance to stress corrosion cracking in comparison with the conventional alloys.
  • the first to fourth alloys and the ninth to thirteenth alloys are excellent in corrosion resistance and favourably comparable with the conventional alloys Nos. 14001 to 14003 containing great amounts of lead. And it was confirmed that especially the fifth and sixth alloys which seek improvement in both machinability and corrosion resistance are very high in corrosion resistance and superior in corrosion resistance to the conventional alloy No. 14006, a naval brass which is the most resistant to corrosion of all the expanded alloys under the JIS designations.
  • test sample In the stress corrosion cracking tests in accordance with the test method described in "JIS H 3250," a 150-mm-long sample was cut out from each extruded test piece. The sample was bent with its centre placed on an arc-shaped tester with a radius of 40 mm in such a way that one end and the other end subtend an angle of 45 degrees. The test sample thus subjected to a tensile residual stress was degreased and dried, and then placed in an ammonia environment in the desiccator with a 2.5% aqueous ammonia (ammonia diluted in the equivalent of pure water). To be exact, the test sample was held some 80 mm above the surface of aqueous ammonia in the desiccator.
  • test sample After the test sample was left standing in the ammonia environment for two hours, 8 hours and 24 hours, the test sample was taken out from the desiccator, washed in sulfuric acid solution 10% and examined for cracks under a magnifier of 10 magnifications.
  • the results are given in Table 38 to Table 50 and Table 61 to Table 66.
  • the alloys which have developed clear cracks when held in the ammonia environment for two hours are marked "xx.”
  • the test samples which had no cracks at passage of two hours but were found to have clear cracks at 8 hours are indicated by "x.”
  • the test samples which had no cracks at 8 hours, but were found to have clear cracks at 24 hours were indicated by "_”.
  • the test samples which were found to have no cracks at all at 24 hours are given a symbol "o.”
  • test piece in the shape of a round bar with the surface cut to a outside diameter of 14 mm and the length cut to 30 mm was prepared from each of the following extruded test pieces: No. 9001 to No. 9005, No. 10001 to No. 10008, No. 11001 to No. 11007, No. 12001 to No. 12021 and No. 14001 to No. 14006.
  • Each test piece was then weighed to measure the weight before oxidation. After that, the test piece was placed in a porcelain crucible and held in an electric furnace maintained at 500°C. At passage of 100 hours, the test piece was taken out of the electric furnace and weighed to measure the weight after oxidation. From the measurements before and after oxidation was calculated the increase in weight by oxidation.
  • the weight of each test piece increased after oxidation.
  • the increase was brought about by high-temperature oxidation. Subjected to a high temperature, oxygen combines with copper, zinc and silicon to form Cu 2 O, ZnO, Si0 2 . That is, oxygen increase contributes to the weight gain. It can be said, therefore, that the alloys which are the smaller in weight increase by oxidation are the more excellent in high-temperature oxidation resistance.
  • Table 61 to Table 64 and Table 66 The results obtained are shown in Table 61 to Table 64 and Table 66.
  • the ninth to twelfth alloys are equal to the conventional alloy No. 14005, an aluminum bronze ranking high in resistance to high-temperature oxidation among the expanded copper alloys under the JIS designations and are far smaller than any other conventional copper alloy.
  • the ninth to twelfth alloys are very excellent in machinability and resistance to high- temperature oxidation as well.
  • alloys Nos. 7001a to 7030a, Nos. 8001a to 8147a and Nos. 14001a to 14006a are identical in composition with the aforesaid copper alloys Nos. 7001 to 7030, Nos. 8001 to 8147 and Nos. 14001 to No. 14006 respectively.
  • test piece thus obtained was cut on the circumferential surface, holed and cut down into a ringshaped test piece 32 mm in outside diameter and 10 mm in thickness (that is, the length in the axial direction).
  • the test piece was then fitted around a free-rotating shaft, and a roll 48 mm in outside diameter placed in parallel with the axis of the shaft was urged against the test piece under a load of 50 kg.
  • the roll was made of stainless steel under the JIS designation SUS 304.
  • These free-cutting copper alloys are preferably subjected to a heat treatment for 30 minutes to 5 hours at 400 to 600 °C.
  • alloy composition (wt%) Cu Si Sn Al P Zn 3001 71.8 2.4 3.1 remainder 3002 78.2 2.3 3.3 remainder 3003 75.0 1.9 1.5 1.4 remainder 3004 74.9 3.2 0.09 remainder 3005 71.6 2.4 2.3 0.03 remainder 3006 76.5 2.7 2.4 0.21 remainder 3007 76.5 3.1 0.6 1.1 0.04 remainder 3008 77.5 3.5 0.4 remainder 3009 75.4 3.0 1.7 remainder 3010 76.5 3.3 0.21 remainder 3011 73.8 2.7 0.04 remainder 3012 75.0 2.9 1.6 0.10 remainder No. alloy composition (wt%) Cu Si Sn A Bi Te Se Zn 4001 70.8 1.9 3.4 0.36 remainder 4002 76.3 3.4 1.
  • machinability hot workability mechanical properties form of chippings condition of cut surface cutting force (N) 700°C deformability tensile strength (N/mm 2 ) elongation (%) 7001 o ⁇ ⁇ 138 ⁇ 670 18 7002 o ⁇ ⁇ 136 ⁇ 712 20 7003 o ⁇ ⁇ 132 ⁇ 783 23 7004 o ⁇ ⁇ 138 ⁇ 736 21 7005 o ⁇ ⁇ 136 ⁇ 785 23 7006 o ⁇ ⁇ 139 ⁇ 700 24 7007 ⁇ ⁇ 138 ⁇ 707 23 7008 o ⁇ ⁇ 131 ⁇ 805 22 7009 o ⁇ ⁇ 136 ⁇ 768 19 7010 o ⁇ ⁇ 135 ⁇ 778 23 7011 ⁇ ⁇ 137 ⁇ 677 23 7012 o ⁇ ⁇ 134 ⁇ 800 21 7013 o ⁇ ⁇ 133 ⁇ 819 22 7014 ⁇ ⁇ 138 ⁇ 641 21 7015 o ⁇
  • machinability hot workability mechanical properties form of chippings condition of cut surface cutting force (N) 700°C deformability tensile strength (N/mm 2 ) elongation (%) 7021 o ⁇ ⁇ 130 ⁇ 754 24 7022 o ⁇ ⁇ 134 ⁇ 780 23 7023 o ⁇ ⁇ 133 ⁇ 765 22 7024 o ⁇ ⁇ 135 ⁇ 772 23 7025 ⁇ ⁇ 138 ⁇ 687 24 7026 o ⁇ ⁇ 135 ⁇ 718 24 7027 o ⁇ ⁇ 136 ⁇ 742 18 7028 ⁇ ⁇ 138 ⁇ 785 20 7029 o ⁇ ⁇ 134 ⁇ 703 23 7030 o ⁇ ⁇ 135 ⁇ 820 18 No.
  • machinability hot workability mechanical properties form of chippings condition of cut surface cutting force (N) 700 °C deformability tensile strength (N/mm 2 ) elongation (%) 8001 o ⁇ ⁇ 132 ⁇ 655 15 8002 o ⁇ ⁇ 129 ⁇ 708 17 8003 o ⁇ ⁇ 127 ⁇ 768 20 8004 o ⁇ ⁇ 128 ⁇ 785 18 8005 o ⁇ ⁇ 131 ⁇ 714 16 8006 o ⁇ ⁇ 134 ⁇ 680 16 8007 o ⁇ ⁇ 132 ⁇ 764 17 8008 o ⁇ ⁇ 130 ⁇ 673 16 8009 o ⁇ ⁇ 132 ⁇ 759 18 8010 o ⁇ ⁇ 132 ⁇ 751 15 8011 o ⁇ ⁇ 134 ⁇ 767 17 8012 o ⁇ ⁇ 128 ⁇ 796 18 8013 o ⁇ ⁇ 129 ⁇ 784 18 8014 o ⁇ ⁇ 129 ⁇ 80
  • machinability hot workability mechanical properties form of chippings condition of cut surface cutting force (N) 700°C deformability tensile strength (N/mm 2 ) elongation (%) 8021 o ⁇ ⁇ 134 ⁇ 765 16 8022 o ⁇ ⁇ 132 ⁇ 770 16 8023 o ⁇ ⁇ 131 ⁇ 746 18 8024 o ⁇ ⁇ 132 ⁇ 816 19 8025 o ⁇ ⁇ 129 ⁇ 759 18 8026 o ⁇ ⁇ 130 ⁇ 726 17 8027 o ⁇ ⁇ 133 ⁇ 703 17 8028 o ⁇ ⁇ 132 ⁇ 737 18 8029 o ⁇ ⁇ 129 ⁇ 719 20 8030 o ⁇ ⁇ 133 ⁇ 645 23 8031 o ⁇ ⁇ 129 ⁇ 764 22 8032 o ⁇ ⁇ 131 ⁇ 790 19 8033 o ⁇ ⁇ 133 ⁇ 674 20 8034 o ⁇ ⁇ 131 ⁇ 748
  • machinability hot workability mechanical properties form of chippings condition of cut surface cutting force (N) 700°C deformability tensile strength (N/mm 2 ) elongation (%) 8041 o ⁇ ⁇ 128 ⁇ 735 23 8042 o ⁇ ⁇ 127 ⁇ 822 18 8043 o ⁇ ⁇ 131 ⁇ 780 18 8044 o ⁇ ⁇ 126 ⁇ 726 21 8045 o ⁇ ⁇ 128 ⁇ 766 22 8046 o ⁇ ⁇ 127 ⁇ 712 23 8047 o ⁇ ⁇ 128 ⁇ 674 21 8048 o ⁇ ⁇ 129 ⁇ 753 24 8049 o ⁇ ⁇ 127 ⁇ 768 22 8050 o ⁇ ⁇ 132 ⁇ 691 17 8051 o ⁇ ⁇ 131 ⁇ 717 17 8052 o ⁇ ⁇ 128 ⁇ 739 21 8053 o ⁇ ⁇ 128 ⁇ 730 22 8054 o ⁇ ⁇ 127 ⁇ 7
  • machinability hot workability mechanical properties form of chippings condition of cut surface cutting force (N) 700°C deformability tensile strength (N/mm 2 ) elongation (%) 8061 o ⁇ ⁇ 129 ⁇ 705 21 8062 o ⁇ ⁇ 131 ⁇ 690 22 8063 o ⁇ ⁇ 133 ⁇ 811 18 8064 o ⁇ ⁇ 131 ⁇ 746 17 8065 o ⁇ ⁇ 133 ⁇ 652 19 8066 o ⁇ ⁇ 130 ⁇ 758 19 8067 o ⁇ ⁇ 129 ⁇ 734 19 8068 o ⁇ ⁇ 131 ⁇ 710 17 8069 o ⁇ ⁇ 131 ⁇ 767 20 8070 o ⁇ ⁇ 131 ⁇ 753 18 8071 o ⁇ ⁇ 129 ⁇ 792 19 8072 o ⁇ ⁇ 131 ⁇ 736 21 8073 o ⁇ ⁇ 130 ⁇ 767 22 8074 o ⁇ ⁇ 132 ⁇ 679 19
  • machinability hot workability mechanical properties form of chippings condition of cut surface cutting force (N) 700°C deformability tensile strength (N/mm 2 ) elongation (%) 8081 o ⁇ ⁇ 132 ⁇ 706 23 8082 o ⁇ ⁇ 130 ⁇ 768 23 8083 o ⁇ ⁇ 128 ⁇ 774 25 8084 o ⁇ ⁇ 129 ⁇ 765 22 8085 o ⁇ ⁇ 130 ⁇ 729 23 8086 o ⁇ ⁇ 133 ⁇ 687 24 8087 o ⁇ ⁇ 131 ⁇ 798 20 8088 o ⁇ ⁇ 132 ⁇ 699 23 8089 o ⁇ ⁇ 130 ⁇ 740 21 8090 o ⁇ ⁇ 132 ⁇ 782 18 8091 o ⁇ ⁇ 129 ⁇ 763 22 8092 o ⁇ ⁇ 130 ⁇ 680 22 8093 o ⁇ ⁇ 131 ⁇ 655 23 8094 o ⁇ ⁇ 128 ⁇ 714 21 8095
  • machinability hot workability mechanical properties form of chippings condition of cut surface cutting force (N) 700°C deformability tensile strength (N/mm 2 ) elongation (%) 8101 o ⁇ ⁇ 131 ⁇ 685 18 8102 o ⁇ ⁇ 132 ⁇ 690 21 8103 o ⁇ ⁇ 133 ⁇ 744 17 8104 o ⁇ ⁇ 130 ⁇ 726 17 8105 o ⁇ ⁇ 133 ⁇ 751 19 8106 o ⁇ ⁇ 130 ⁇ 752 21 8107 o ⁇ 131 ⁇ 760 21 8108 o ⁇ ⁇ 132 ⁇ 748 22 8109 o ⁇ ⁇ 130 ⁇ 807 18 8110 o ⁇ ⁇ 133 ⁇ 739 16 8111 o ⁇ ⁇ 132 ⁇ 717 17 8112 o ⁇ ⁇ 134 ⁇ 763 20 8113 o ⁇ ⁇ 129 ⁇ 745 22 8114 o ⁇ ⁇ 132 ⁇ 722 20 8
  • machinability hot workability mechanical properties form of chippings condition of cut surface cutting force (N) 700 °C deformability tensile strength (N/mm 2 ) elongation (%) 8121 o ⁇ ⁇ 130 ⁇ 788 20 8122 o ⁇ ⁇ 131 ⁇ 755 22 8123 o ⁇ ⁇ 127 ⁇ 711 21 8124 o ⁇ ⁇ 130 ⁇ 763 20 8125 o ⁇ ⁇ 131 ⁇ 687 18 8126 o ⁇ ⁇ 134 ⁇ 706 17 8127 o ⁇ ⁇ 128 ⁇ 730 22 8128 o ⁇ ⁇ 130 ⁇ 702 23 8129 o ⁇ ⁇ 132 ⁇ 727 21 8130 o ⁇ ⁇ 130 ⁇ 701 24 8131 o ⁇ ⁇ 129 ⁇ 745 22 8132 o ⁇ ⁇ 132 ⁇ 749 21 8133 o ⁇ ⁇ 130 ⁇ 826 18 8134 o ⁇ ⁇ 128 ⁇ 770 20
  • machinability hot workability mechanical properties form of chippings condition of cut surface cutting force (N) 700°C deformability tensile strength (N/mm 2 ) elongation (%) 8141 o ⁇ ⁇ 131 ⁇ 687 22 8142 o ⁇ ⁇ 130 ⁇ 635 20 8143 o ⁇ ⁇ 129 ⁇ 710 23 8144 o ⁇ ⁇ 130 ⁇ 662 24 8145 o ⁇ ⁇ 128 ⁇ 728 23 8146 o ⁇ ⁇ 129 ⁇ 753 21 8147 o ⁇ ⁇ 130 ⁇ 709 24 No.

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EP05075421.7A 1998-10-12 1998-11-16 Bleifrei Automatenkupferlegierung Expired - Lifetime EP1559802B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP28859098 1998-10-12
JP28859098A JP3734372B2 (ja) 1998-10-12 1998-10-12 無鉛快削性銅合金
EP98953071A EP1045041B1 (de) 1998-10-12 1998-11-16 Bleifreie automatenkupferlegierung

Related Parent Applications (1)

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EP98953071A Division EP1045041B1 (de) 1998-10-12 1998-11-16 Bleifreie automatenkupferlegierung

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EP1559802A1 true EP1559802A1 (de) 2005-08-03
EP1559802B1 EP1559802B1 (de) 2014-01-15

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EP05017189A Expired - Lifetime EP1600515B8 (de) 1998-10-12 1998-11-16 Bleifreie Automatenkupferlegierung
EP05017190A Expired - Lifetime EP1600516B1 (de) 1998-10-12 1998-11-16 Bleifreie Automatenkupferlegierung
EP05017191A Expired - Lifetime EP1600517B1 (de) 1998-10-12 1998-11-16 Bleifreie Automatenkupferlegierung
EP98953071A Expired - Lifetime EP1045041B1 (de) 1998-10-12 1998-11-16 Bleifreie automatenkupferlegierung
EP05075421.7A Expired - Lifetime EP1559802B1 (de) 1998-10-12 1998-11-16 Bleifrei Automatenkupferlegierung

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EP05017189A Expired - Lifetime EP1600515B8 (de) 1998-10-12 1998-11-16 Bleifreie Automatenkupferlegierung
EP05017190A Expired - Lifetime EP1600516B1 (de) 1998-10-12 1998-11-16 Bleifreie Automatenkupferlegierung
EP05017191A Expired - Lifetime EP1600517B1 (de) 1998-10-12 1998-11-16 Bleifreie Automatenkupferlegierung
EP98953071A Expired - Lifetime EP1045041B1 (de) 1998-10-12 1998-11-16 Bleifreie automatenkupferlegierung

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EP (5) EP1600515B8 (de)
JP (1) JP3734372B2 (de)
KR (1) KR100352213B1 (de)
AU (1) AU744335B2 (de)
CA (1) CA2314144C (de)
DE (4) DE69832097T2 (de)
TW (1) TW421674B (de)
WO (1) WO2000022182A1 (de)

Cited By (3)

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EP2194150A1 (de) * 2008-12-02 2010-06-09 Xiamen LOTA International Co., Ltd Bleifreie und frei schneidbare Siliciummessinglegierung mit hohem Zinkanteil und Herstellungsverfahren dafür
EP3405592A4 (de) * 2016-01-21 2019-08-28 Fortune Mfg. Co. Ltd. Bleifreie zerspanbare messinglegierungen mit ausgezeichneter giessbarkeit, verfahren zur herstellung davon und anwendung davon
EP3985136A1 (de) 2020-10-16 2022-04-20 Diehl Metall Stiftung & Co. KG Bleifreie kupferlegierung sowie verwendung der bleifreien kupferlegierung

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Publication number Priority date Publication date Assignee Title
US8506730B2 (en) 1998-10-09 2013-08-13 Mitsubishi Shindoh Co., Ltd. Copper/zinc alloys having low levels of lead and good machinability
US7056396B2 (en) 1998-10-09 2006-06-06 Sambo Copper Alloy Co., Ltd. Copper/zinc alloys having low levels of lead and good machinability
JP3459623B2 (ja) * 2000-08-08 2003-10-20 京和ブロンズ株式会社 無鉛青銅合金
JP4496662B2 (ja) 2001-04-20 2010-07-07 株式会社豊田自動織機 斜板式圧縮機における斜板
US20040234412A1 (en) * 2002-09-09 2004-11-25 Keiichiro Oishi High-strength copper alloy
JP4522736B2 (ja) * 2004-03-30 2010-08-11 株式会社キッツ 金型鋳造用銅基合金とこの合金を用いた鋳塊・製品
US20070169854A1 (en) 2004-08-10 2007-07-26 Sanbo Shindo Kogyo Kabushiki Kaisha Copper-based alloy casting in which grains are refined
BRPI0516067B1 (pt) * 2004-10-11 2014-10-14 Diehl Metall Stiftung & Co Kg Liga de cobre/zinco/silício, e seu processo de produção
KR100631041B1 (ko) 2005-03-04 2006-10-04 주식회사 풍산 절삭성 및 가공성이 우수한 쾌삭황동합금
ES2294604T3 (es) 2005-07-28 2008-04-01 Gebr. Kemper Gmbh + Co. Kg Metallwerke Procedimiento de fabricacion de piezas fundidas en cobre, con tendencia a la migracion reducida.
WO2007013428A1 (ja) * 2005-07-28 2007-02-01 San-Etsu Metals Co., Ltd. 銅合金押出材およびその製造方法
ATE557108T1 (de) 2005-09-22 2012-05-15 Mitsubishi Shindo Kk Kupferautomatenlegierung mit sehr wenig blei
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