CN107385273B - A kind of casting environment-friendly yellow brass alloy and its manufacturing method - Google Patents
A kind of casting environment-friendly yellow brass alloy and its manufacturing method Download PDFInfo
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- CN107385273B CN107385273B CN201710551042.8A CN201710551042A CN107385273B CN 107385273 B CN107385273 B CN 107385273B CN 201710551042 A CN201710551042 A CN 201710551042A CN 107385273 B CN107385273 B CN 107385273B
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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
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- 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
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- 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
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- 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
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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
Abstract
It is able to satisfy unleaded requirement the present invention provides a kind of and is different from Bi brass, silizin and environment-friendly yellow brass alloy of arsenic yellow copper and preparation method thereof, selenium, tellurium, antimony, phosphorus, magnesium, manganese element are also free of in the brass alloys.Alloy of the present invention is by as follows at being grouped as: the Cu of 58-61.5wt.%, the Al of Pb, 0.5-0.8wt.% of≤0.25wt.%, the Sn of < 0.1wt.%, < 0.1wt.% Ni, 0.02-0.15wt.% Fe, 5-12ppm B, remaining is Zn and inevitable impurity.Alloy of the present invention has good comprehensive performance in addition to polishing performance, heat crack resistance are excellent, the water heating bathroom components suitable for casting and forming.
Description
Technical field
The invention belongs to technical field of alloy, and in particular to one kind is different from Bi brass, silizin and arsenic yellow copper, and is free of
Casting leadless environment-friendly brass alloys and its manufacturing method of selenium, tellurium, antimony, phosphorus, magnesium, manganese element.
Background technique
Ledrite contains the lead of 1wt.%-4wt.%, because having excellent cutting and processability, and low in cost, quilt
It is widely used in the every field such as electrical, mechanical, hot-water heating.However, since ledrite can make environment in production, use process
At pollution, human health is endangered, the developed countries and regions such as the U.S., European Union, Japan successively formulate lead-free standard and decree, such as
NSF-ANSI61, NSF-ANSI372, AB-1953, RoHS etc..Wherein American AB -1953 to the definition of " unleaded " be Pb content not
More than 0.25wt%.China GB 18145-2014 " ceramic seal water nozzle " also answer in regulation drinking water components by the amount of precipitation of lead
Less than 5ug/L.
It is unleaded for realization brass, the cutting ability by realizing brass alloys for lead with selenium, tellurium, antimony was once studied,
And by adding suitable other elements to improve the comprehensive performance of brass alloys.Though adding selenium in brass, tellurium can be effectively improved
Cutting ability, but because selenium, tellurium are expensive, it is not easy to be added in fusion process, recovery rate is low, does not obtain marketing always and produces
Industry.And antimony itself has toxicity, and when Sb content is greater than 0.02%, the amount of dissolution of the product through NSF test antimony element in water
It will exceed 0.6 μ g/L as defined in GB18145-2014 standard, may not apply to potable water system components.
Studying the leadless environment-friendly brass for extensively and having obtained market high volume applications at present mainly has three categories, is bismuth Huang respectively
Copper, silizin and arsenic yellow copper, but this few class leadless environment-friendly brass is each defective.Bi brass is in forming process because being also easy to produce containing Bi
Fire check, and welding performance is poor, and due to bismuth in recovery process by associate lead, pollute environment, therefore Bi brass is always
Do not received by European market；Because its anti-stress corrosiveness is poor, stress corrosion failure easily occurs silizin in use for product；
And be the arsenic yellow copper for meeting the anti-dezincification requirement AS 2345-2006 in Australia (average dezincification layer depth is no more than 100 μm) exploitation, then
It is poor that there are alloy flowabilities, shrinks tendency greatly, the high problem of casting fraction defective.
Phosphorus, magnesium, manganese are added in some brass to improve the properties of brass, but the introducing of these elements is in waste material
Difficulty is brought in recycling.
Therefore, at present there are still demand come develop it is other be different from Bi brass, silizin and arsenic yellow copper, and without selenium,
Tellurium, antimony, phosphorus, magnesium, manganese high comprehensive performance leadless environment-friendly brass alloys.
Summary of the invention
For overcome the deficiencies in the prior art, unleaded requirement is able to satisfy it is an object of the present invention to provide one kind and be different from bismuth Huang
Copper, silizin and environment-friendly yellow brass alloy of arsenic yellow copper and preparation method thereof, in the brass alloys also without selenium, tellurium, antimony, phosphorus, magnesium,
Manganese element.
It is a further object to provide a kind of environment-friendly yellow brass alloy and its system with excellent heat crack resistance
Preparation Method.
It is a further object to provide a kind of environment-friendly yellow brass alloy with good polishability and its preparation sides
Method.
The further object of the present invention is to provide a kind of environment-friendly yellow brass alloy and preparation method thereof of high comprehensive performance, this
A little comprehensive performances include that can be mass, and at low cost, mechanical property and casting character are good, and polishing and welding performance are good, are resisted
Hot tearing is functional, and anti-stress corrosion performance is good.
The purpose of the present invention is achieved through the following technical solutions.
The present invention provides a kind of casting environment-friendly yellow brass alloy, consisting of: the Cu of 58-61.5wt.% ,≤
Ni, 0.02-0.15wt.%'s of the Al of Pb, 0.5-0.8wt.% of 0.25wt.%, the Sn of < 0.1wt.%, < 0.1wt.%
The B of Fe, 5-12ppm, remaining is Zn and inevitable impurity.
The content of Cu is preferably 59-61wt.% in the brass alloys.
The content of Al is preferably 0.6-0.8wt% in the brass alloys, more preferably 0.65-0.75wt.%.
The content of Pb is preferably 0.15-0.25wt.% in the brass alloys, and machinability is preferable at this time, but in order to reach
Further unleaded demand is it is also preferred that < 0.15wt.%, more preferably < 0.1wt.%.
The content of Sn is preferably 0.02-0.08wt.% in the brass alloys, more preferably 0.05-0.08wt.%.
The content of Ni is preferably 0.02-0.08wt.% in the brass alloys, or preferably < 0.02wt.%.
The content of Fe is preferably 0.03-0.08wt.% in the brass alloys.
The content of B is preferably 5-10ppm in the brass alloys, is even more preferably 7-9ppm.
The thermal crack resistant force value of the brass alloys is 245-400N, more preferable 350-400N.
The preparation method of above-mentioned brass alloys, comprising the following steps: the matter of element and each element according to contained by brass alloys
Amount percentage weighs brass waste material, cathode copper, Zn, Al, Sn, Ni, Pb and copper and iron intermediate alloy, wherein copper and iron intermediate alloy
In Cu content be 90-95wt.%；Then plus Ni, copper and iron intermediate alloy, Huang every furnace melting forehearth bottom adds appropriate slag-cleaning agent,
Copper waste material adds cathode copper and slag-cleaning agent on surface when brass waste material has melted 1/4, after all materials are melted completely
Zn, Al, Sn, Pb are sequentially added, and is stirred, heating fishing slag, then carries out composition detection after metal is completely melt
And performance detection, fining agent is added when necessary, and flame, standing, fishing slag come out of the stove and pour ingot after indices are qualified；The wherein Huang
At least one of copper waste material and fining agent contain boron.
In the above preparation method, slag-cleaning agent preferably wherein is not borax.
Because Cu-B intermediate alloy is high-melting-point alloy, be also easy to produce Hard Inclusion after addition, thus the present invention preferably add it is thin
Agent is not Cu-B Master alloy refiners.
The each element added in alloy of the present invention will be described in detail below.
Addition is not more than the lead (Pb) of 0.25wt.%, can improve the cutting ability of brass alloys, refines crystal grain, improves
Casting character, and the lead tolerance met in AB1953 about the components material contacted in potable water system with water is no more than
Regulation of the scorification output less than 5 μ g/L in the regulation and NSF 61 and GB18145-2014 of 0.25wt.%.
The addition of aluminium (Al) element can significantly improve the mobility of alloy, improvement casting character, and Al solution strengthening
Alloy strength can be improved in effect, and Al content is preferably controlled in 0.5-0.8wt.%, and Al content is too low, improves not to alloy flowability
Obviously, the easily loose leak of product, but when Al content is excessively high, mobility can also decrease.
Iron (Fe) primarily serves the effect of refinement crystal grain as necessary element of the invention, and Fe is molten in brass tissue
Solution degree very little, Chang Yifu Fe phase particle are present in matrix, become nucleus to refine crystal grain, to improve the mobility of alloy
And casting forming function.When, there are when B, both Fe and B are combined, and thinning effect is more preferably in alloy.Fe content preferably controls
0.02-0.15wt.%, Fe < 0.02wt.%, thinning effect is bad, as Fe > 0.15wt.%, easily forms Hard Inclusion, reduces
The polishing quality of alloy.
The main function of boron (B) is to play the role of Metamorphism treatment refinement crystal grain, as B < 5ppm, pairing together with Fe
Gold thinning effect it is unobvious, the inventors discovered that develop alloy during exist frequent occurrence Hard Inclusion, polishability difference
Problem is studied repeatedly, the inventors discovered that this is because caused by alloy exists simultaneously larger amount of Fe and B, to keep preferable
Polishability, the amount of Fe and B needs to reach certain balance, and as Fe > 0.02wt.%, the content of B must be controlled in <
12ppm just can guarantee the polishing quality of product.
Corrosion resistance can be improved in addition tin (Sn) element, improves casting character and cutting ability, reduces gas in casting
Hole and it is loose the defects of, Sn content of the present invention preferably control in 0.1wt.% hereinafter, Sn too high levels then alloy becomes fragile, casting character
Deteriorate.
Alloy strength, toughness and corrosion resistance can be improved in addition nickel (Ni) element, can especially enhance the resistance to stress of brass
Corrosive nature, Ni of the present invention are preferably controlled in 0.1wt.% hereinafter, excessively high, increase cost.
Specifically, brass alloys of the invention are compared with prior art, at least have the advantages that
Brass alloys lead content of the invention is no more than 0.25wt.%, also without elements such as selenium, tellurium, antimony, both meets
AB1953 unleaded decree requirement, and meet the requirement in NSF61 and GB18145-2014 to metal amount of precipitation in water.
Alloy of the present invention overcomes Bi brass and is also easy to produce fire check, and the problem that welding performance is poor；Overcome silizin
The problem of anti-stress corrosion performance difference；Arsenic yellow copper poor fluidity is overcome, shrinks and is inclined to big problem.
The heat crack resistance of brass alloys of the invention is good.
Brass alloys of the invention cooperate thinning microstructure by Fe and B, have while with good casting character
Good polishing performance.
Brass of the invention avoids the elements bring such as P, Mg and Mn adverse effect without elements such as P, Mg and Mn,
Convenient for old material recycling.
Brass waste material is used in the raw material of alloy of the present invention, and copper content is low, production cost is low, while also having and can criticize
Amount production, mechanical property and casting character are good, and polishing and welding performance are good, and heat crack resistance is good, anti-stress corrosiveness
It can good overall characteristic.
Specific embodiment
The present invention is described in further detail combined with specific embodiments below.
Embodiment
The present invention is further described in detail combined with specific embodiments below, and the embodiment provided is only for illustrating
The present invention, the range being not intended to be limiting of the invention.
The preparation and constituent analysis of the alloy of the present invention of embodiment 1 and comparative alloy
A.The preparation and constituent analysis of alloy 1-6 of the present invention
Be prepared as follows alloy 1-6 of the present invention: it is useless to weigh brass by the mass percent of alloying component of the present invention
Old material, cathode copper, Zn, Al, Sn, Ni, Pb and copper and iron intermediate alloy, wherein the content of the Cu in copper and iron intermediate alloy is 90-
95wt.%；Every furnace melting forehearth bottom adds suitable non-borax slag-cleaning agent, then plus nickel, copper and iron intermediate alloy, brass waste material,
When brass waste material has melted 1/4 surface add cathode copper, sequentially added after all materials are melted completely Zn, Al, Sn,
Pb, and stir, heating fishing slag, then carries out the performance detections such as composition detection and polishing after metal is completely melt,
Non- CuB alloy refinement agent is added when necessary, and flame, standing, fishing slag, are warming up to 1050-1100 DEG C and go out after indices are qualified
Furnace pours ingot.
Table 1 is listed in using the composition of invention alloy 1-6 made from the above method.
B. the acquisition or preparation and constituent analysis of comparative alloy 1-9
Comparative alloy 1 is the lead brass alloy ZCuZn40Pb2 bought in the market, and composition is listed in table 1.
Comparative alloy 2-9 is prepared by following universal method, the raw material used is determined by the element for including in each comparative alloy:
Cu, Si, Zn, Al, Sn, Ni, Pb, Mn and copper phosphorus, copper boron, copper and iron intermediate alloy are weighed by the mass percent of alloying component,
Wherein copper boron, Cu in copper and iron intermediate alloy content be 90wt.%, the content of the Cu of copper phosphorus intermediate alloy is 85wt.%；
Si, Ni are placed in power frequency induction furnace bottom, and the raw material of Cu and Zn are placed on Si, Ni, and add refining agent, it is warming up to 1050~
1100 DEG C, until material all melts, filter off surface scum；Al, Sn, Pb, Mn are sequentially added in resulting material, be sufficiently stirred with
Guarantee that ingredient is uniform；Copper and iron, copper phosphorus intermediate alloy, stirring and static 5-10min are added in resulting material；It is added among copper boron and closes
Gold is warming up to 1100~1150 DEG C, and flame simultaneously keeps the temperature 5-8min；1000~1050 DEG C of heat preservations are stood, and filter off surface scum；?
It comes out of the stove for 1050~1100 DEG C and is poured cooling.
Table 1 is listed in using the composition of comparative alloy 2-9 made from the above method.
The performance detection of the alloy of the present invention of embodiment 2 and comparative alloy
The properties of the alloy of the present invention and comparative alloy that are obtained by above-mentioned preparation embodiment will be detected below,
Specific performance detection project and method are as follows, and testing result asks that see Table 2 for details.
1. casting character
Band sample: for measuring the linear shrinkage ratio of alloy, linear shrinkage ratio is lower, illustrates that the heat resistanceheat resistant crackle ability of alloy is got over
By force.Alloy melt is cast on the band sample mold of length 200mm at a temperature of 1050 DEG C, passes through measurement mould after cooling
The clearance distance of tool and alloy sample, calculates to obtain linear shrinkage ratio.
Spiral shape sample: alloy melt is cast on spiral shape sample mould at a temperature of 1050 DEG C, measures alloy melt
Trickling length, to measure alloy flowability.Length of trickling is longer, and the mobility of alloy is better, and phase is inclined in the contraction of alloy
It should reduce, casting character is more preferable.
2. mechanical property
Tensile property: the tensile strength and elongation percentage of alloy are tested according to GB/T228-2010, by invention alloy
It is processed into the standard sample that diameter is 10mm with comparative alloy, carries out tension test at room temperature, the tension for testing each alloy is strong
Degree and elongation percentage.
Brinell hardness: the hardness of alloy is tested according to GB/T231.1-2009, by invention alloy and comparative alloy
Casting circular specimen, both ends vehicle is flat, tests the Brinell hardness of each alloy.
3, polishing performance
The sample block of sawing 35mm long, takes its cross section on extrusion ingot length direction.The cross section of sample block is taken by technique
(100#-240#-400#- calico wheel) is processed by shot blasting.The example cross section after polishing is wiped clean with dry cloth, luminosity not
Lower than being estimated under conditions of 300LX, polishing performance is judged.There are Hard Inclusion, it is poor to show as polishing performance, with "×" table
Show.Without Hard Inclusion, it is excellent to show as polishing performance, is indicated with "○".
4. welding performance
Weldment is low pressure casting casting/CuZn37 brass tube, is brazed, flame heating, 350~400 DEG C of temperature.Solderability
Evaluation criterion is that whether weld dimensions are cracked and stomata, flawless, pore-free are qualification, is indicated with "○"；It is no
It is then unqualified, it is indicated with "×".
5. heat crack resistance
Alloy melt pours into hot tearing retractometer at a temperature of 1050 DEG C, and by JB/T 4022.2, " alloy casting character is measured
The measurement of method hot cracking tendency " method measures its thermal crack resistant force value.Thermal crack resistant force value is higher, and the hot cracking tendency of alloy is smaller.
6. anti-stress corrosion performance
Same money tap completed knocked down products are taken to carry out ammonia cure examination by GB/T 10567.2-2007 and YS/T814-2012 respectively
It tests, after ammonia cure, takes out sample, be first rinsed with water clean, the then washed samples surface in 5% sulfuric acid solution at room temperature
Corrosion product is finally rinsed with water and dries up again, respectively by method described in GB/T 10567.2-2007 and YS/T814-2012
Determine whether ammonia cure result is qualified.
It is precipitated 7. underwater gold belongs to
To alloying element of the present invention, the execution of NSF/ANSI 61-2007 standard, detector are pressed in the amount of dissolution measurement in water are as follows:
Varian 820-MS Icp.Mass Spectrometer (Inductively coupled plasma mass spectrometry), time are 19 days, and sample is water
Leading cast product, it is desirable that the μ of Pb≤5 μ of g/L, Sb≤0.6 g/L.
Analysis of experimental results:
Pb the and Sb content that alloy 1-6 underwater gold of the present invention belongs to precipitation meets NSF61 and GB18145-2014 standard and wants
It asks.Comparative alloy 1 is Winn bronze, wherein the Pb being precipitated is exceeded, comparative alloy 4 is brass containing Sb, wherein the Sb being precipitated is exceeded.
Comparative alloy 2-3 is Bi brass, their welding performance is unqualified, and the welding performance of alloy 1-6 of the present invention is better than
Comparative alloy 2-3；The linear shrinkage ratio of alloy 1-6 of the present invention is less than comparative alloy 2-3, the thermal crack resistant force value of alloy 1-6 of the present invention
Greater than comparative alloy 2-3, this illustrates the thermal crack resistant ability of alloy of the present invention better than Bi brass.
Comparative alloy 5-6 is silizin, is tested according to YS/T814-2012, the anti-stress corrosion performance of comparative alloy 5-6
Unqualified, the anti-stress corrosion performance of alloy 1-6 of the present invention is better than silizin.
Comparative alloy 7 is arsenic yellow copper, and the linear shrinkage ratio of alloy 1-6 of the present invention, trickling length are significantly better than that comparative alloy
7, i.e., the contraction tendency of alloy of the present invention is significantly less than comparative alloy 7, and casting character is better than arsenic yellow copper alloy, alloy 1- of the present invention
6 mechanical property is also significantly better than arsenic yellow copper alloy.
Because Fe content is higher in comparative alloy 8, and B content be greater than 12ppm, compared with invention alloy 1-6, polishing performance compared with
Difference.
In comparative alloy 9 Cu content be higher than the application in Cu content, in addition to manufacturing cost is higher, comparative alloy 9 it is whole
Body comprehensive performance is also not so good as alloy 1-6 of the present invention.
In conclusion alloy of the present invention meets the unleaded decree requirement of AB1953, and underwater gold category amount of precipitation meets
GB18145-2014 standard requirements, overcome the defect of Bi brass, silizin, arsenic yellow copper, at the same have good casting character,
These comprehensive performances of mechanical property, polishing performance, welding performance, anti-stress corrosion performance, heat crack resistance.
For alloy of the present invention as a kind of leadless environment-friendly brass alloys, the application on following potable water system components will
Gradually expand.
Above-described embodiment is used to explain the present invention, rather than is limited the invention, in spirit and right of the invention
In claimed range, to any modifications and changes that the present invention makes, protection scope of the present invention is both fallen within.
Claims (17)
1. a kind of casting environment-friendly yellow brass alloy, consisting of: Pb, 0.5- of the Cu of 58-61.5wt.% ,≤0.25wt.%
The B of Fe, 7-12ppm of Ni, 0.02-0.15wt.% of the Al of 0.8wt.%, the Sn of < 0.1wt.%, < 0.1wt.%, remaining
For Zn and inevitable impurity.
2. brass alloys according to claim 1, which is characterized in that the content of Cu is 59- in the brass alloys
61wt.%；The content of Al is 0.6-0.8wt%.
3. brass alloys according to claim 2, the content of Al is 0.65-0.75wt.%.
4. brass alloys according to claim 1 or 2, which is characterized in that the content of Pb is 0.15- in the brass alloys
0.25wt.%.
5. brass alloys according to claim 1 or 2, which is characterized in that the content of Pb is < in the brass alloys
0.15wt.%.
6. brass alloys according to claim 5, which is characterized in that in the brass alloys content of Pb be <
0.1wt.%.
7. brass alloys according to claim 1 or 2, which is characterized in that the content of Sn is 0.02- in the brass alloys
0.08wt.%.
8. brass alloys according to claim 7, which is characterized in that the content of Sn is 0.05- in the brass alloys
0.08wt.%.
9. brass alloys according to claim 1 or 2, which is characterized in that the content of Ni is 0.02- in the brass alloys
0.08wt.%.
10. brass alloys according to claim 1 or 2, which is characterized in that the content of Ni is < in the brass alloys
0.02wt.%.
11. brass alloys according to claim 1 or 2, which is characterized in that the content of Fe is in the brass alloys
0.03-0.08wt.%.
12. brass alloys according to claim 1 or 2, which is characterized in that the content of B is 7- in the brass alloys
10ppm。
13. brass alloys according to claim 12, which is characterized in that the content of B is 7-9ppm in the brass alloys.
14. brass alloys according to claim 1 or 2, which is characterized in that the thermal crack resistant force value of the brass alloys is
245-400N。
15. brass alloys according to claim 14, which is characterized in that the thermal crack resistant force value of the brass alloys is 350-
400N。
16. the preparation method of brass alloys described in any one of claim 1-15, it is characterised in that the following steps are included:
The mass percent of element and each element according to contained by brass alloys weigh brass waste material, cathode copper, Zn, Al, Sn,
Ni, Pb and copper and iron intermediate alloy, wherein the content of the Cu in copper and iron intermediate alloy is 90-95wt.%；
Then plus Ni, copper and iron intermediate alloy, brass waste material every furnace melting forehearth bottom adds appropriate slag-cleaning agent, to brass waste material
Cathode copper and slag-cleaning agent are added on surface when having melted 1/4, sequentially adds Zn, Al, Sn, Pb after all materials are melted completely,
And stir, heating fishing slag, then carries out composition detection and performance detection, adds when necessary after metal is completely melt
Fining agent, flame, standing, fishing slag come out of the stove and pour ingot after indices are qualified；
Wherein at least one of the brass waste material and fining agent contain boron.
17. the preparation method of brass alloys according to claim 16, which is characterized in that slag-cleaning agent therein is not borax,
In the fining agent added be not Cu-B Master alloy refiners.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710551042.8A CN107385273B (en) | 2017-07-07 | 2017-07-07 | A kind of casting environment-friendly yellow brass alloy and its manufacturing method |
| PCT/CN2018/094181 WO2019007309A1 (en) | 2017-07-07 | 2018-07-03 | Environmentally friendly brass alloy for casting and manufacturing method therefor |
| EP18828473.1A EP3650563A4 (en) | 2017-07-07 | 2018-07-03 | Environmentally friendly brass alloy for casting and manufacturing method therefor |
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| CN201710551042.8A CN107385273B (en) | 2017-07-07 | 2017-07-07 | A kind of casting environment-friendly yellow brass alloy and its manufacturing method |
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| CN107385273B (en) * | 2017-07-07 | 2019-03-01 | 路达(厦门)工业有限公司 | A kind of casting environment-friendly yellow brass alloy and its manufacturing method |
| DE102017118386A1 (en) * | 2017-08-11 | 2019-02-14 | Grohe Ag | Copper alloy, use of a copper alloy, sanitary fitting and method of making a sanitary fitting |
| CN110923497B (en) * | 2019-10-29 | 2021-03-16 | 福建工程学院 | Intermediate alloy for refining crystalline structure of copper and copper alloy, preparation method and application process thereof |
| CN111101017B (en) * | 2019-12-31 | 2021-04-27 | 黑龙江北鸥卫浴用品有限公司 | Corrosion-resistant low-lead brass alloy, brass casting and preparation method thereof |
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| CN107385273B (en) * | 2017-07-07 | 2019-03-01 | 路达(厦门)工业有限公司 | A kind of casting environment-friendly yellow brass alloy and its manufacturing method |
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2017
- 2017-07-07 CN CN201710551042.8A patent/CN107385273B/en active Active
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2018
- 2018-07-03 EP EP18828473.1A patent/EP3650563A4/en active Pending
- 2018-07-03 WO PCT/CN2018/094181 patent/WO2019007309A1/en unknown
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| CN102618747A (en) * | 2011-01-26 | 2012-08-01 | 摩登岛股份有限公司 | Free cutting brass alloy |
| CN105779812A (en) * | 2014-12-22 | 2016-07-20 | 百路达（厦门）工业有限公司 | Unleaded brass alloy |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3650563A4 (en) | 2021-04-07 |
| EP3650563A1 (en) | 2020-05-13 |
| CN107385273A (en) | 2017-11-24 |
| WO2019007309A1 (en) | 2019-01-10 |
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