WO2019007309A1 - Alliage de laiton écologique pour coulage et son procédé de fabrication - Google Patents

Alliage de laiton écologique pour coulage et son procédé de fabrication Download PDF

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Publication number
WO2019007309A1
WO2019007309A1 PCT/CN2018/094181 CN2018094181W WO2019007309A1 WO 2019007309 A1 WO2019007309 A1 WO 2019007309A1 CN 2018094181 W CN2018094181 W CN 2018094181W WO 2019007309 A1 WO2019007309 A1 WO 2019007309A1
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WO
WIPO (PCT)
Prior art keywords
brass
alloy
brass alloy
content
copper
Prior art date
Application number
PCT/CN2018/094181
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English (en)
Chinese (zh)
Inventor
龙佳
张华威
毕秋
林明源
吕青
张卫星
胡振青
Original Assignee
路达(厦门)工业有限公司
百路达（厦门）工业有限公司
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 路达(厦门)工业有限公司, 百路达（厦门）工业有限公司 filed Critical 路达(厦门)工业有限公司
Priority to EP18828473.1A priority Critical patent/EP3650563A4/fr
Publication of WO2019007309A1 publication Critical patent/WO2019007309A1/fr

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Classifications

    • 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
    • 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
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/03—Making non-ferrous alloys by melting using master alloys
    • 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
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
    • 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 belongs to the technical field of alloys, and particularly relates to a lead-free environmentally-friendly brass alloy for casting which is different from bismuth brass, silicon brass and arsenic brass and does not contain selenium, tellurium, antimony, phosphorus, magnesium and manganese elements. Its manufacturing method.
  • Lead brass contains 1wt.%-4wt.% lead, which is widely used in various fields such as electrical, mechanical and plumbing because of its excellent cutting and forming properties and low cost.
  • lead brass is polluted by the environment during production and use, it is harmful to human health.
  • Developed countries and regions such as the United States, the European Union, and Japan have successively formulated lead-free standards and laws, such as NSF-ANSI61 and NSF-ANSI372.
  • AB-1953 in the United States defines "lead-free” as having a Pb content of no more than 0.25 wt%.
  • China's GB 18145-2014 "ceramic sealing nozzle" also stipulates that the precipitation of lead in drinking water parts should be less than 5ug / L.
  • Phosphorus, magnesium and manganese are added to some brass to improve the properties of brass, but the introduction of these elements has made it difficult to recycle used materials.
  • the object of the present invention is to provide an environmentally friendly brass alloy which can meet the requirements of lead-free and is different from bismuth brass, silicon brass and arsenic brass, and a preparation method thereof, and also in the brass alloy Contains no selenium, tellurium, antimony, phosphorus, magnesium or manganese.
  • Another object of the present invention is to provide an environmentally friendly brass alloy having excellent heat crack resistance and a method for preparing the same.
  • Another object of the present invention is to provide an environmentally friendly brass alloy having good polishing properties and a method of preparing the same.
  • a further object of the present invention is to provide an environmentally-friendly brass alloy with excellent comprehensive performance and a preparation method thereof, which can be mass-produced, low in cost, good in mechanical properties and casting properties, good in polishing and welding performance, and resistant to thermal cracking. Good, good resistance to stress corrosion.
  • the invention provides an environment-friendly brass alloy for casting, which has a composition of: 58-61.5 wt.% of Cu, ⁇ 0.25 wt.% of Pb, 0.5-0.8 wt.% of Al, ⁇ 0.1 wt.% of Sn, ⁇ 0.1 wt.% of Ni, 0.02-0.15 wt.% of Fe, 5-12 ppm of B, and the balance of Zn and unavoidable impurities.
  • the content of Cu in the brass alloy is preferably from 59 to 61% by weight.
  • the content of Al in the brass alloy is preferably from 0.6 to 0.8% by weight, more preferably from 0.65 to 0.75 wt.%.
  • the content of Pb in the brass alloy is preferably from 0.15 to 0.25 wt.%, and the machinability is good at this time, but it is preferably ⁇ 0.15 wt.%, more preferably ⁇ 0.1 wt.%, in order to achieve further lead-free demand. .
  • the content of Sn in the brass alloy is preferably 0.02 to 0.08 wt.%, more preferably 0.05 to 0.08 wt.%.
  • the content of Ni in the brass alloy is preferably 0.02 to 0.08 wt.%, or preferably ⁇ 0.02 wt.%.
  • the content of Fe in the brass alloy is preferably from 0.03 to 0.08 wt.%.
  • the content of B in the brass alloy is preferably 5 to 10 ppm, and more preferably 7 to 9 ppm.
  • the brass alloy has a thermal cracking resistance value of 245 to 400 N, more preferably 350 to 400 N.
  • the preparation method of the above brass alloy comprises the steps of: weighing brass waste materials, electrolytic copper, Zn, Al, Sn, Ni, Pb and copper-iron intermediate alloy according to the elements contained in the brass alloy and the mass percentage of each element; The content of Cu in the copper-iron intermediate alloy is 90-95 wt.%; an appropriate amount of slag-removing agent is added to the bottom of each furnace before smelting, and then Ni, copper-iron intermediate alloy, brass waste material is added, and the brass waste material is melted. Add 1/4 copper to the surface and add slag to the surface. After all the materials are completely melted, add Zn, Al, Sn, Pb, and mix well. After the metal is completely melted, the slag is heated and then tested. Testing, if necessary, adding a refining agent, after the various indicators are qualified, spitting, standing, and discharging the slag to the ingot; wherein at least one of the brass waste material and the refining agent contains boron.
  • the slag remover is not borax.
  • the additional refiner of the present invention is not a Cu-B master alloy refiner.
  • Adding no more than 0.25 wt.% of lead (Pb) can improve the cutting performance of brass alloys, refine grains, improve casting performance, and meet the lead content of AB1953 for parts and materials in contact with water in drinking water systems.
  • the amount does not exceed 0.25 wt.%, and the lead precipitation in NSF 61 and GB 18145-2014 is less than 5 ⁇ g / L.
  • Al element can significantly improve the fluidity of the alloy, improve the casting performance, and the effect of solid solution strengthening of Al can improve the strength of the alloy.
  • the Al content should be controlled at 0.5-0.8wt.%, and the Al content is too low.
  • the fluidity of the alloy is not improved obviously, and the product is easy to loosen and leak water, but when the Al content is too high, the fluidity will also decrease.
  • Iron (Fe) is an essential element of the present invention, mainly plays a role in refining crystal grains.
  • the solubility of Fe in brass structure is very small, and the Fe-rich phase is often present in the matrix to become a crystal nucleus to refine the crystal. Granules, thereby improving the fluidity and casting properties of the alloy.
  • B is present in the alloy, both Fe and B are combined, and the refining effect is better.
  • the Fe content should be controlled at 0.02-0.15wt.%, Fe ⁇ 0.02wt.%, and the refining effect is not good. When Fe>0.15wt.%, it is easy to form hard spots and reduce the polishing quality of the alloy.
  • the main function of boron (B) is to act together with Fe to refine the grains.
  • B the refining effect on the alloy is not obvious.
  • the inventors have found that hardening often occurs in the process of developing alloys. The problem of poor particle and polishing property, after repeated research, the inventors found that this is because the alloy has a relatively large amount of Fe and B at the same time, in order to maintain a good polishing property, the amount of Fe and B needs to reach a certain balance.
  • Fe>0.02wt.% the content of B must be controlled at ⁇ 12ppm to ensure the polishing quality of the product.
  • tin (Sn) element can improve corrosion resistance, improve casting performance and cutting performance, and reduce defects such as pores and porosity in the casting.
  • the Sn content of the present invention should be controlled below 0.1 wt.%, and the alloy becomes brittle when the content of Sn is too high. Casting performance deteriorates.
  • Ni nickel
  • the addition of nickel (Ni) element can improve the strength, toughness and corrosion resistance of the alloy, and in particular, can enhance the stress corrosion resistance of the brass.
  • the Ni of the present invention should be controlled below 0.1 wt.%, and if it is too high, the cost is increased.
  • the brass alloy of the present invention has at least the following beneficial effects as compared with the prior art:
  • the lead content of the brass alloy of the invention does not exceed 0.25 wt.%, and does not contain elements such as selenium, tellurium and antimony, which meets the requirements of the lead-free law of AB1953, and meets the requirements for the precipitation of metal in water in NSF61 and GB18145-2014. .
  • the alloy of the invention overcomes the problem that the brass is prone to hot cracking and has poor welding performance; overcomes the problem of poor resistance to stress corrosion of the silicon brass; overcomes the problem that the arsenic brass has poor fluidity and large shrinkage tendency.
  • the brass alloy of the present invention has good heat crack resistance.
  • the brass alloy of the present invention has a fine polishing property by blending Fe and B, and has good casting properties while having good casting properties.
  • the brass of the present invention does not contain elements such as P, Mg, and Mn, and avoids adverse effects caused by elements such as P, Mg, and Mn, and is also convenient for recycling old materials.
  • the raw material of the alloy of the invention uses brass waste material, has low copper content, low production cost, and has mass production, good mechanical properties and casting performance, good polishing and welding performance, good thermal crack resistance and resistance to stress corrosion. Comprehensive performance with good performance.
  • the alloy 1-6 of the invention is prepared according to the following method: the brass waste material, electrolytic copper, Zn, Al, Sn, Ni, Pb and copper-iron intermediate alloy are weighed according to the mass percentage of the alloy component of the invention, wherein the copper-iron intermediate alloy The content of Cu is 90-95wt.%; an appropriate amount of non-borax slag agent is added to the bottom of each furnace before smelting, and then nickel, copper-iron intermediate alloy, brass waste material is added, and the brass waste material has been melted by 1/4. Add electrolytic copper to the surface. After all the materials are completely melted, add Zn, Al, Sn, Pb, and stir them evenly.
  • Comparative Alloy 1 was a commercially available lead brass alloy ZCuZn40Pb2, the composition of which is shown in Table 1.
  • the comparative alloy 2-9 was prepared according to the following general method, and the raw materials used were determined according to the elements contained in the respective comparative alloys: Cu, Si, Zn, Al, Sn, Ni, Pb, Mn, and copper phosphorus were weighed according to the mass percentage of the alloy component.
  • Strip specimen used to determine the linear shrinkage of the alloy. The lower the linear shrinkage, the stronger the thermal crack resistance of the alloy.
  • the alloy melt was cast on a strip sample mold of length 200 mm at a temperature of 1050 ° C. After cooling, the line shrinkage was calculated by measuring the gap distance between the mold and the alloy sample.
  • Spiral sample The alloy melt was cast on a spiral sample mold at a temperature of 1050 ° C, and the flow length of the alloy melt was measured to measure the fluidity of the alloy. The longer the flow length, the better the fluidity of the alloy, the lower the shrinkage tendency of the alloy, and the better the casting performance.
  • Brinell hardness According to GB/T231.1-2009, the hardness of the alloy is tested. The round sample of the invention alloy and the comparative alloy is cast, and the two ends are leveled to test the Brinell hardness of each alloy.
  • a 35 mm long piece was sawed in the length direction of the ingot and its cross section was taken.
  • the cross section of the sample was polished by the process (100#-240#-400#-white cloth wheel).
  • the cross section of the polished sample was wiped clean with a dry cloth, and visual inspection was performed under conditions of a luminosity of not less than 300 LX to evaluate the polishing performance.
  • the welded parts are low pressure cast castings/CuZn37 brass tubes, brazed, flame heated, and the temperature is 350-400 °C.
  • the weldability evaluation standard is whether cracks and pores appear in the weld and heat affected zone, and no cracks or voids are qualified, which is indicated by “ ⁇ ”; otherwise, it is not qualified, and is represented by “ ⁇ ”.
  • the alloy melt was poured into a thermal cracking shrinkage apparatus at a temperature of 1050 ° C, and its thermal cracking resistance value was measured according to JB/T 4022.2 "Determination of the hot cracking tendency of the alloy casting property measurement method". The higher the thermal cracking resistance value, the smaller the thermal cracking tendency of the alloy.
  • the dissolution of the alloying elements of the present invention in water is performed according to the NSF/ANSI 61-2007 standard, and the detector is: Varian 820-MS Icp.
  • Mass Spectrometer inductively coupled plasma mass spectrometer
  • the time is 19 days
  • the sample is a faucet casting product.
  • Comparative alloy 1 is a lead-containing brass in which Pb is excessively exceeded
  • comparative alloy 4 is a Sb-containing brass in which Sb is excessively precipitated.
  • the comparative alloy 2-3 is bismuth brass, and their welding performance is unsatisfactory.
  • the welding performance of the alloy 1-6 of the invention is better than that of the comparative alloy 2-3; the linear shrinkage of the alloy 1-6 of the invention is smaller than that of the comparative alloy 2-3
  • the alloys 1-6 of the present invention have higher thermal cracking resistance values than the comparative alloys 2-3, which indicates that the alloys of the present invention have better thermal cracking resistance than bismuth brass.
  • Comparative alloy 5-6 is a silicon brass. According to the YS/T814-2012 test, the corrosion corrosion resistance of the comparative alloy 5-6 is unsatisfactory, and the stress corrosion resistance of the alloy 1-6 of the present invention is superior to that of the silicon brass.
  • the comparative alloy 7 is arsenic brass, and the linear shrinkage and the flowing length of the alloy 1-6 of the invention are obviously superior to those of the comparative alloy 7, that is, the shrinking tendency of the alloy of the invention is significantly smaller than that of the comparative alloy 7, and the casting performance is superior to that of the arsenic brass alloy.
  • the mechanical properties of the alloys 1-6 of the present invention are also significantly better than those of the arsenic brass alloys.
  • the polishing performance is inferior to that of the inventive alloy 1-6.
  • Comparative Alloy 9 The Cu content in Comparative Alloy 9 is higher than the Cu content in the present application, and the overall overall performance of Comparative Alloy 9 is not as good as Alloy 1-6 of the present invention, except for the high manufacturing cost.
  • the alloy of the invention meets the requirements of the lead-free law of AB1953, and the amount of metal precipitation in the water meets the requirements of GB18145-2014, overcomes the defects of bismuth brass, silicon brass and arsenic brass, and has good casting performance.
  • Comprehensive properties such as mechanical properties, polishing properties, weldability, stress corrosion resistance, and thermal crack resistance.
  • the alloy of the present invention will gradually expand in the application of future drinking water system components.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Domestic Plumbing Installations (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)

Abstract

La présente invention concerne un alliage de laiton écologique pour coulage et son procédé de fabrication. L'alliage de laiton est exempt des éléments sélénium, tellure, antimoine, phosphore, magnésium et manganèse, et ses constituants sont : 58-61,5 % en poids de Cu, ≤ 0,25 % en poids de Pb, 0,5-0,8 % en poids de Al, ＜0,1 % en poids de Sn, ＜0,1 % en poids de Ni, 0,02-0,15 % de Fe, et 5-12 ppm de B, le reste étant du Zn et des impuretés inévitables. En plus des excellentes performance de polissage et de résistance à la fissuration thermique, l'alliage de laiton présente de bonnes performances globales, et est approprié pour couler des pièces de plomberie pour salle de bains.
PCT/CN2018/094181 2017-07-07 2018-07-03 Alliage de laiton écologique pour coulage et son procédé de fabrication WO2019007309A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18828473.1A EP3650563A4 (fr) 2017-07-07 2018-07-03 Alliage de laiton écologique pour coulage et son procédé de fabrication

Applications Claiming Priority (2)

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CN201710551042.8 2017-07-07
CN201710551042.8A CN107385273B (zh) 2017-07-07 2017-07-07 一种铸造用环保黄铜合金及其制造方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117686291A (zh) * 2022-09-02 2024-03-12 山东众标企信检测科技有限公司 一种铜及铜合金光谱分析标准物质及其制备方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN110923497B (zh) * 2019-10-29 2021-03-16 福建工程学院 细化铜及铜合金结晶组织的中间合金、其制备方法及使用工艺
CN111101017B (zh) * 2019-12-31 2021-04-27 黑龙江北鸥卫浴用品有限公司 耐腐蚀低铅黄铜合金、黄铜铸件及其制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101619404A (zh) * 2009-08-11 2010-01-06 路达(厦门)工业有限公司 一种适于锻造用易切削无铅黄铜合金及其制备方法
CN102560190A (zh) * 2012-01-30 2012-07-11 九星控股集团有限公司 一种高锌无铅黄铜合金及制备方法
US20120251382A1 (en) * 2011-01-11 2012-10-04 Ningbo Xingaoda Advanced Metallic Materials Co., Ltd. Lead-free free-cutting corrosion-resistant silicon-bismuth brass alloy
CN103725919A (zh) * 2014-01-03 2014-04-16 安新县华昌合金厂 一种无铅黄铜合金
CN104745863A (zh) * 2015-04-08 2015-07-01 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
CN107385273A (zh) * 2017-07-07 2017-11-24 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

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4100583B2 (ja) * 1997-08-25 2008-06-11 中越合金鋳工株式会社 鉄系材料と高力黄銅合金を接合する方法
CN101440443A (zh) * 2008-12-10 2009-05-27 宁波博威集团有限公司 一种耐脱锌腐蚀的低锑铝黄铜合金及其制造方法
JP5513230B2 (ja) * 2009-06-17 2014-06-04 サンエツ金属株式会社 鋳造用銅基合金
CN102618747A (zh) * 2011-01-26 2012-08-01 摩登岛股份有限公司 易切削的黄铜合金
WO2015100873A1 (fr) * 2014-01-03 2015-07-09 嘉兴艾迪西暖通科技有限公司 Laiton sans plomb, sans bismuth, sans silicone
KR20150093099A (ko) * 2014-01-03 2015-08-17 찌아싱 아이디시 플러밍 엔드 히팅 테크놀로지 엘티디 비스무트와 규소를 포함하지 않은 낮은 리드 황동
CN104032176B (zh) * 2014-06-23 2015-03-11 江西鸥迪铜业有限公司 低铅黄铜合金
CN105779812B (zh) * 2014-12-22 2019-04-05 百路达（厦门）工业有限公司 一种黄铜合金
EP3050983B1 (fr) * 2015-01-28 2019-03-13 Toto Ltd. Laiton ayant une coulabilité améliorée et une résistance à la corrosion
CN106893883A (zh) * 2015-12-18 2017-06-27 九牧厨卫股份有限公司 一种铸造用低铅易切削硅黄铜合金及其制备方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101619404A (zh) * 2009-08-11 2010-01-06 路达(厦门)工业有限公司 一种适于锻造用易切削无铅黄铜合金及其制备方法
US20120251382A1 (en) * 2011-01-11 2012-10-04 Ningbo Xingaoda Advanced Metallic Materials Co., Ltd. Lead-free free-cutting corrosion-resistant silicon-bismuth brass alloy
CN102560190A (zh) * 2012-01-30 2012-07-11 九星控股集团有限公司 一种高锌无铅黄铜合金及制备方法
CN103725919A (zh) * 2014-01-03 2014-04-16 安新县华昌合金厂 一种无铅黄铜合金
CN104745863A (zh) * 2015-04-08 2015-07-01 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
CN107385273A (zh) * 2017-07-07 2017-11-24 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3650563A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117686291A (zh) * 2022-09-02 2024-03-12 山东众标企信检测科技有限公司 一种铜及铜合金光谱分析标准物质及其制备方法

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CN107385273B (zh) 2019-03-01
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CN107385273A (zh) 2017-11-24

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