EP2960351A1 - Laiton sans bismuth et sans silicone et à faible teneur en plomb - Google Patents

Laiton sans bismuth et sans silicone et à faible teneur en plomb Download PDF

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Publication number
EP2960351A1
EP2960351A1 EP14730412.5A EP14730412A EP2960351A1 EP 2960351 A1 EP2960351 A1 EP 2960351A1 EP 14730412 A EP14730412 A EP 14730412A EP 2960351 A1 EP2960351 A1 EP 2960351A1
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Prior art keywords
alloy
lead
brass alloy
manganese
brass
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EP14730412.5A
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German (de)
English (en)
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EP2960351A4 (fr
Inventor
Jiade LI
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JiaXing IDC Plumbing & Heating Technology Ltd
Zhejiang Idc Fluid Control Co Ltd
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JiaXing IDC Plumbing & Heating Technology Ltd
Zhejiang Idc Fluid Control Co Ltd
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Publication of EP2960351A1 publication Critical patent/EP2960351A1/fr
Publication of EP2960351A4 publication Critical patent/EP2960351A4/fr
Withdrawn legal-status Critical Current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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • 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

Definitions

  • the invention relates to a low-lead brass alloy, and particularly to a brass alloy which is both free cutting and resistant to dezincification.
  • the brass for processing is added with metallic zinc by a percentage of 38-42%.
  • brass In order to make it easy to process brass, brass usually contains 2-3% lead to enhance strength and processability.
  • Lead-containing brass has excellent moldability (making it easy to fabricate products of various shapes), cutting performance, and abrasion resistance, so that it is widely applied to mechanical part with various shapes, accounts for a large proportion in the copper industry, and is well known as one of the most important basic material in the world.
  • lead-containing brass tends to dissolve in the solid or gas state. Medical studies have shown that lead can bring about substantial damage to the human hematopoietic and nervous systems, especially children's kidneys and other organs.
  • silicon may appear in the alloy metallographic structure as ⁇ phase (sometimes as ⁇ phase).
  • silicon may replace the function of lead in the alloy to an extent, and improve cutting performance of the alloy.
  • Cutting performance of the alloy increases with the content of silicon.
  • silicon has a high melting point and a low specific gravity and is prone to be oxidized.
  • silicon floats on the surface of alloy.
  • silicon will be oxidized into silicon oxides or other oxides, making it difficult to produce silicon-containing copper alloy.
  • the economic cost is increased.
  • Bismuth can be added to replace lead for forming cutting breakpoints in the alloy structure to improve cutting performance.
  • thermal cracking is prone to occur during forging in case of a high bismuth content, which is not conducive for producing.
  • 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 bismuth-free silicon-free brass alloys.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 1) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, 0.1-0.7 wt% aluminum, 0.05-0.5 wt% tin, and a balance of zinc.
  • the content of lead is reduced to 0.1-0.25 wt%
  • the content of copper is controlled at 60-65 wt%
  • a small quantity of aluminum and tin is added to improve cutting performance of the alloy.
  • the metallographic structure of the alloy mainly comprises ⁇ phase, ⁇ phase, ⁇ phase, and soft and brittle intermetallic compounds which are distributed in grain boundaries or grains. Copper and zinc make main constituents of the brass alloy.
  • Adding tin into the alloy can form ⁇ phase, thus increasing cutting performance of the alloy.
  • the addition of tin obviously increases strength, plasticity, and corrosion resistance of the alloy.
  • aluminum is added along with tin.
  • the content of tin and aluminum is 0.05-0.5 wt% and 0.1-0.7 wt%, respectively.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 2) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, 0.1-0.7 wt% aluminum, 0.05-0.5 wt% tin, and further comprises 0.05-0.5 wt% manganese and/or 0.05-0.3 wt% phosphorus, and a balance of zinc.
  • the inventive product 2 is further added with 0.05-0.3 wt% phosphorus and/or 0.05-0.5 wt% manganese.
  • phosphorus can't form ⁇ phase, phosphorus has a function of facilitating a good distribution of ⁇ phase, thus increasing cutting performance of the alloy.
  • ⁇ phase will disperse crystal grains of the primary ⁇ phase, thus increasing casting performance and corrosion resistance of the alloy.
  • phosphorus can not play its role effectively.
  • the content of phosphorus is higher than 0.3 wt%
  • casting performance and corrosion resistance will be affected adversely.
  • Adding manganese helps to improve dezincification resistance and cast flowability.
  • manganese can not play its role effectively.
  • manganese can play its role to the saturation value.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 3) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, 0.1-0.7 wt% aluminum, 0.05-0.5 wt% tin, and further comprises one or more element selected from the group consisting of 0.05-0.3 wt% phosphorus, 0.05-0.5 wt% manganese and 0.001-0.01 wt% boron by the total weight of the brass alloy, and a balance of zinc.
  • the inventive product 3 is further added with trace boron, so as to better suppress alloy dezincification, increase the mechanical strength, and alter defect structure of cuprous oxide film on the surface of copper alloy, thus forming a cuprous oxide film which is more uniform, dense, and stain resistant.
  • boron can't play its role as mentioned above.
  • the content of boron is higher than 0.01 wt%, the above performance can't be further increased.
  • the optimum content of boron is 0.001-0.01 wt%.
  • the content of phosphorus and manganese has the same interval as that of the inventive product 2, and this is based on the same reason as that of the inventive product 2.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 4) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, 0.1-0.7 wt% aluminum, 0.05-0.5 wt% tin, 0.05-0.3 wt% phosphorus, and further comprises 0.05-0.5 wt% manganese and 0.001-0.01 wt% boron, and a balance of zinc.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 5) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, 0.1-0.7 wt% aluminum, 0.05-0.5 wt% tin, 0.05-0.3 wt% phosphorus, 0.05-0.5 wt% manganese and 0.001-0.01 wt% boron, and a balance of zinc, and further comprises unavoidable impurities which comprise, by the total weight of the brass alloy, 0.25 wt% or less nickel, 0.15 wt% or less chrome and/or 0.25 wt% or less iron.
  • the inventive product 5 further comprises some unavoidable impurities, i.e., mechanical impurities of nickel, chrome and/or iron.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 6) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, 0.1-0.7 wt% aluminum, 0.05-0.5 wt% tin, 0.05-0.3 wt% phosphorus, 0.05-0.5 wt% manganese and 0.001-0.01 wt% boron, and a balance of zinc, wherein a total content of aluminum, tin, phosphorus, manganese and boron is not larger than 2 wt% of the total weight of the brass alloy.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 7) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, 0.1-0.7 wt% aluminum, 0.05-0.5 wt% tin, 0.05-0.3 wt% phosphorus, 0.05-0.5 wt% manganese and 0.001-0.01 wt% boron, and a balance of zinc, wherein a total content of aluminum, tin, phosphorus, manganese and boron is 0.2-2 wt% of the total weight of the brass alloy.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 8) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, and two or more elements selected from the group consisting of, by the total weight of the brass alloy, 0.1-0.7 wt% aluminum, 0.05-0.5 wt% tin, 0.05-0.3 wt% phosphorus, 0.05-0.5 wt% manganese and 0.001-0.01 wt% boron, and a balance of zinc.
  • Whether aluminum, tin, phosphorus, manganese and/or boron should be added depends on the requirement for cutting performance of various products.
  • the content to be added has the same interval as that of the inventive product 3, and this is based on the same reason as that of the inventive product 3.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 9) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, and two or more elements selected from the group consisting of, by the total weight of the brass alloy, 0.1-0.7 wt% aluminum, 0.05-0.5 wt% tin, 0.05-0.3 wt% phosphorus, 0.05-0.5 wt% manganese and 0.001-0.01 wt% boron, and a balance of zinc, and further comprises unavoidable impurities which comprise, by the total weight of the brass alloy, 0.25 wt% or less nickel, 0.15 wt% or less chrome and/or 0.25 wt% or less iron.
  • the inventive product 9 further comprises some unavoidable impurities, i.e., mechanical impurities of nickel, chrome and/or iron.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 10) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, 0.05-0.5 wt% tin and 0.05-0.3 wt% phosphorus, and a balance of zinc.
  • the content of phosphorus in the inventive product 10 has the same interval and effect as that in the inventive product 2.
  • phosphorus can't form ⁇ phase
  • phosphorus has a function of facilitating a good distribution of ⁇ phase.
  • ⁇ phase will disperse crystal grains of the primary ⁇ phase, thus increasing casting performance and corrosion resistance of the alloy.
  • the needs for cutting performance can still be met in the usual production situation.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 11) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, 0.05-0.5 wt% tin and 0.05-0.3 wt% phosphorus, and further comprises two or more elements selected from the group consisting of 0.1-0.7 wt% aluminum, 0.05-0.5 wt% manganese and 0.001-0.01 wt% boron by the total weight of the brass alloy, and a balance of zinc.
  • a low-lead bismuth-free silicon-free brass alloy with excellent cutting performance (hereinafter referred to as the inventive product 12) comprises, by the total weight of the brass alloy, 60-65 wt% copper, 0.1-0.25 wt% lead, 0.05-0.5 wt% tin and 0.05-0.3 wt% phosphorus, two or more elements selected from the group consisting of 0.1-0.7 wt% aluminum, 0.05-0.5 wt% manganese and 0.001-0.01 wt% boron by the total weight of the brass alloy, and further comprises unavoidable impurities which comprise, by the total weight of the brass alloy, 0.25 wt% or less nickel, 0.15 wt% or less chrome and/or 0.25 wt% or less iron, and a balance of zinc.
  • the inventive product 12 further comprises some unavoidable impurities, i.e., mechanical impurities of nickel, chrome and/or iron.
  • the invention further provides a method for fabricating brass alloy.
  • the method comprises the steps of:
  • a copper-manganese alloy is provided as the precursor of copper and manganese elements.
  • the melting furnace is a high-frequency melting furnace, and the high-frequency melting furnace is provided with a furnace lining of graphite crucible.
  • the high-frequency melting furnace has the features of a large melting rate, a large temperature elevating rate, cleanness without pollution, and the ability of self-stirring (i.e., under the action of magnetic field lines) during melting.
  • the low-lead bismuth-free silicon-free brass alloy is formed by adding various constituents in respective ratio, and then subjecting them to a process in a high-frequency melting furnace.
  • the resulting brass alloy has a mechanical processability which is comparable with that of the existing lead-containing brass, has an excellent tensile strength, elongation rate, and dezincification resistance, and has a low content of lead.
  • the brass alloy is suitable for replacing the existing lead-containing brass alloy and for producing parts like faucet and sanitary ware.
  • Fig. 1 is a flow chart illustrating a method for fabricating the inventive product 3.
  • the wording "or more”, “or less” in the expression for describing values indicates that the expression comprises the relevant values.
  • 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 100 ⁇ m
  • ⁇ indicates a dezincification depth between 100 ⁇ m and 200 ⁇ m
  • X indicates a dezincification depth larger than 200 ⁇ 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.
  • Fig. 1 is a flow chart illustrating a method for fabricating the inventive product 3, which comprises the steps of:
  • Table 1-1 lists inventive products 1 with 5 different constituents which are fabricated with the above process, which are respectively numbered as 1001-1005, each constituent being in the unit of weight percentage (wt%).
  • Table 1-1 No. copper (Cu) zinc (Zn) lead (Pb) aluminum (Al) tin (Sn) 1001 63.633 35.559 0.235 0.231 0.340 1002 64.365 34.183 0.250 0.700 0.500 1003 62.345 36.943 0.110 0.300 0.300 1004 65.000 34.424 0.100 0.424 0.050 1005 60.000 39.445 0.108 0.100 0.345
  • 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.
  • Table 2-1 lists inventive products 2 with 5 different constituents which are fabricated with the above process, which are respectively numbered as 2001-2005, each constituent being in the unit of weight percentage (wt%).
  • Table 2-1 No. copper (Cu) zinc (Zn) lead (Pb) aluminum (Al) tin (Sn) manganese (Mn) phosphorus (P) 2001 60.000 39.137 0.144 0.312 0.055 0.050 0.300 2002 64.307 34.305 0.214 0.700 0.320 ---- 0.152 2003 62.221 37.467 0.250 0.521 0.089 0.500 0.050 2004 65.000 32.662 0.213 0.685 0.500 0.432 ---- 2005 61.331 37.922 0.100 0.100 0.050 0.443 0.252
  • 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.
  • Table 3-1 lists inventive products 3 with 8 different constituents which are fabricated with the above process, which are respectively numbered as 3001-3008, each constituent being in the unit of weight percentage (wt%).
  • Table 3-1 No. copper (Cu) zinc (Zn) lead (Pb) aluminum (Al) tin (Sn) manganese (Mn) phosphorus (P) boron (B) 3001 62.400 36.395 0.220 0.542 0.152 ---- 0.288 0.001 3002 60.000 39.245 0.100 0.163 0.406 0.075 ---- 0.009 3003 64.221 34.422 0.122 0.344 0.500 0.332 0.050 0.007 3004 63.443 35.250 0.203 0.700 0.351 0.050 ---- 0.001 3005 63.766 34.967 0.200 0.698 0.081 ---- 0.286 ---- 3006 64.250 35.061 0.152 0.100 0.130 ---- 0.300 0.005 3007 60.355 38.534 0.250
  • 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.
  • Table 4-1 lists inventive products 4 with 8 different constituents which are fabricated with the above process, which are respectively numbered as 4001-4008, each constituent being in the unit of weight percentage (wt%).
  • Table 4-1 No. copper (Cu) zinc (Zn) lead (Pb) aluminum (Al) tin (Sn) manganese (Mn) phosphorus (P) boron (B) 4001 61.306 37.387 0.205 0.650 0.050 0.093 0.300 0.007 4002 61.560 37.539 0.100 0.165 0.413 0.170 0.050 0.001 4003 63.750 35.015 0.193 0.371 0.500 0.057 0.107 0.005 4004 62.105 36.704 0.211 0.502 0.333 0.050 0.083 0.010 4005 65.000 33.232 0.202 0.700 0.085 0.487 0.286 0.006 4006 62.950 35.663 0.188 0.304 0.132 0.498 0.260 0.003 4007 60.000 38.802 0.250 0.387 0.
  • 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.
  • Table 5-1 lists inventive products 5 with 8 different constituents which are fabricated with the above process, which are respectively numbered as 5001-5008, each constituent being in the unit of weight percentage (wt%).
  • Table 5-1 No. copper (Cu) zinc (Zn) lead (Pb) manganese (Mn) alumin um (Al) tin (Sn) phosphorus (P) boron (B) nickel (Ni) chrome (Cr) iron (Fe) 5001 61.783 37.673 0.100 0.067 0.155 0.050 0.105 0.002 --- 0.065 --- 5002 62.344 36.864 0.187 0.056 0.267 0.063 0.050 0.001 0.010 0.150 0.008 5003 65.000 33.638 0.250 0.500 0.100 0.172 0.211 0.010 0.007 0.097 0.015 5004 62.271 36.191 0.147 0.324 0.156 0.500 0.300 0.007 0.104 --- --- 5005 64.033 34.003 0.195 0.211 0.545
  • 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.
  • Table 6-1 lists inventive products 6 with 8 different constituents which are fabricated with the above process, which are respectively numbered as 6001-6008, each constituent being in the unit of weight percentage (wt%).
  • Table 6-1 No. copper (Cu) zinc (Zn) lead (Pb) manganese (Mn) aluminum (Al) tin (Sn) phosphorus (P) boron (B) 6001 62.311 37.687 0.103 0.105 0.100 0.050 0.211 0.009 6002 60.000 39.824 0.117 0.057 0.322 0.121 0.300 0.010 6003 62.052 37.195 0.201 0.050 0.203 0.234 0.055 0.008 6004 62.261 36.613 0.250 0.213 0.104 0.500 0.050 0.007 6005 64.075 34.316 0.207 0.304 0.556 0.432 0.103 0.005 6006 63.011 35.151 0.184 0.500 0.607 0.331 0.213 0.001 6007 65.000 33.371 0.197 0.443 0.700
  • 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.
  • Table 7-1 lists inventive products 7 with 8 different constituents which are fabricated with the above process, which are respectively numbered as 7001-7008, each constituent being in the unit of weight percentage (wt%).
  • Table 7-1 No. copper (Cu) zinc (Zn) lead (Pb) manganes e (Mn) aluminum (Al) tin (Sn) phosphoru s (P) boron (B) 7001 60.231 38.981 0.100 0.341 0.112 0.103 0.122 0.008 7002 61.054 38.264 0.196 0.117 0.231 0.076 0.050 0.010 7003 62.013 36.904 0.133 0.500 0.100 0.050 0.292 0.006 7004 62.613 35.805 0.100 0.493 0.540 0.143 0.300 0.004 7005 65.000 33.525 0.211 0.050 0.631 0.500 0.076 0.005 7006 63.011 35.287 0.250 0.210 0.700 0.410 0.123 0.007 7007 60.000 38.747 0.201
  • 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.
  • Table 8-1 lists inventive products 8 with 8 different constituents which are fabricated with the above process, which are respectively numbered as 8001-8008, each constituent being in the unit of weight percentage (wt%).
  • Table 8-1 No. copper (Cu) zinc (Zn) lead (Pb) manganes e (Mn) aluminum (Al) tin (Sn) phosphoru s(P) boron (B) 8001 60.000 39.615 0.105 0.052 0.123 --- 0.102 0.001 8002 62.031 37.395 0.197 0.121 0.100 0.102 0.050 ---- 8003 62.178 36.995 0.250 0.455 --- 0.112 --- 0.008 8004 65.000 33.839 0.100 0.500 0.341 0.050 0.158 0.010 8005 64.175 35.328 0.211 --- --- 0.277 0.007 8006 64.097 34.142 0.233 0.314 0.407 0.500 0.300 0.005 8007 63.050 35.487 0.102 0.218 0.518
  • 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.
  • Table 9-1 lists inventive products 9 with 8 different constituents which are fabricated with the above process, which are respectively numbered as 9001-9008, each constituent being in the unit of weight percentage (wt%).
  • Table 9-1 No. copper (Cu) zinc (Zn) lead (Pb) mangan ese (Mn) alumin um (Al) tin (Sn) phosph orus (P) boron (B) nickel (Ni) chrome (Cr) iron (Fe) 9001 61.058 38.409 0.112 --- --- 0.098 0.073 ---- --- 0.250 9002 62.025 36.933 0.109 0.102 0.500 0.050 0.050 0.010 0.009 0.113 0.099 9003 60.000 39.554 0.100 0.050 --- --- 0.007 0.215 --- 0.074 9004 61.256 36.743 0.207 0.321 0.700 0.134 0.231 0.008 0.250 0.150 --- 9005 65.000 34.019 0.198 0.0
  • 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.
  • Table 10-1 lists inventive products 1 with 5 different constituents which are fabricated with the above process0, which are respectively numbered as 10001-10005, each constituent being in the unit of weight percentage (wt%).
  • Table 10-1 No. copper (Cu) zinc (Zn) lead (Pb) tin (Sn) phosphorus (P) 10001 60.000 39.740 0.113 0.089 0.056 10002 62.345 37.272 0.100 0.050 0.231 10003 65.000 33.964 0.234 0.500 0.300 10004 61.983 37.366 0.247 0.324 0.078 10005 64.037 35.552 0.250 0.109 0.050
  • 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.
  • Table 11-1 lists inventive products 11 with 8 different constituents which are fabricated with the above process, which are respectively numbered as 11001-11008, each constituent being in the unit of weight percentage (wt%).
  • Table 11-1 No. copper (Cu) zinc (Zn) lead (Pb) manganes e (Mn) aluminum (Al) tin (Sn) phosphoru s(P) boron (B) 11001 63.521 36.133 0.119 0.098 ---- 0.067 0.050 0.010 11002 62.143 37.196 0.234 0.050 0.198 0.054 0.123 ----- 11003 60.000 39.228 0.235 0.178 0.100 0.103 0.150 0.006 11004 63.015 35.844 0.200 ---- 0.655 0.050 0.231 0.003 11005 65.000 33.061 0.250 0.500 0.543 0.343 0.300 0.001 11006 61.197 37.214 0.179 0.377 0.433 0.500 0.098 ----- 11007 61.132
  • 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.
  • Table 12-1 lists inventive products 12 with 8 different constituents which are fabricated with the above process, which are respectively numbered as 12001-12008, each constituent being in the unit of weight percentage (wt%).
  • Table 2-1 No. copper (Cu) zinc (Zn) lead (Pb) mangan ese (Mn) alumin um (Al) tin (Sn) phosph orus (P) boron (B) nickel (Ni) chrome (Cr) iron (Fe) 12001 61.148 38.358 0.250 0.098 --- 0.088 0.050 0.005 ---- ---- 0.003 12002 62.434 36.989 0.123 0.050 0.102 0.103 0.076 0.001 0.122 ---- ---- 12003 60.000 39.131 0.108 --- 0.234 0.231 0.136 0.010 ---- 0.150 ---- 12004 60.166 38.272 0.197 0.232 --- 0.455 0.220 0.007 0.250 0.098 0.103 12005
  • 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.
  • the lead-free bismuth-free silicon-free brass alloy of the invention can be formed by adding various constituents in respective ratio, and then subjecting them to a process in a high-frequency melting furnace.
  • the resulting brass alloy has a mechanical processability which is comparable with that of the existing lead-containing brass, has an excellent tensile strength, elongation rate, and dezincification resistance, and has a low content of lead.
  • the brass alloy is suitable for replacing the existing lead-containing brass alloy and for producing parts like faucet and sanitary ware.

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  • Crystallography & Structural Chemistry (AREA)
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  • Domestic Plumbing Installations (AREA)
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EP14730412.5A 2014-01-03 2014-04-09 Laiton sans bismuth et sans silicone et à faible teneur en plomb Withdrawn EP2960351A4 (fr)

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CN201410003999 2014-01-03
PCT/CN2014/074938 WO2015100872A1 (fr) 2014-01-03 2014-04-09 Laiton sans bismuth et sans silicone et à faible teneur en plomb

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JP (1) JP6008159B2 (fr)
KR (1) KR20150093099A (fr)
CN (1) CN103917675A (fr)
AU (1) AU2014202539B2 (fr)
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EP3050983B1 (fr) * 2015-01-28 2019-03-13 Toto Ltd. Laiton ayant une coulabilité améliorée et une résistance à la corrosion
JP6056947B2 (ja) * 2015-01-28 2017-01-11 Toto株式会社 鋳造性および耐食性に優れた黄銅
JP6576077B2 (ja) * 2015-04-01 2019-09-18 Ｄｏｗａメタルテック株式会社 低Ｐｂ黄銅棒材およびその製造方法
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
CN107699727A (zh) * 2017-09-28 2018-02-16 江苏晶王新材料科技有限公司 一种低铅铜合金复合材料
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DE102024128271A1 (de) * 2024-09-30 2026-04-02 Grohe Ag Kupfer-Zink-Legierung für eine Sanitärarmatur, Verwendung einer Kupfer-Zink-Legierung zur Herstellung einer Sanitärarmatur und Sanitärarmatur

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EP2960351A4 (fr) 2016-11-23
AU2014202539A1 (en) 2015-07-23
US20160145719A1 (en) 2016-05-26
WO2015100872A1 (fr) 2015-07-09
TW201527559A (zh) 2015-07-16
KR20150093099A (ko) 2015-08-17
JP2016508186A (ja) 2016-03-17
CN103917675A (zh) 2014-07-09
TWI550106B (zh) 2016-09-21
JP6008159B2 (ja) 2016-10-19
AU2014202539B2 (en) 2016-04-07

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