CN107385273A - A kind of casting environment-friendly yellow brass alloy and its manufacture method - Google Patents
A kind of casting environment-friendly yellow brass alloy and its manufacture method Download PDFInfo
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- CN107385273A CN107385273A CN201710551042.8A CN201710551042A CN107385273A CN 107385273 A CN107385273 A CN 107385273A CN 201710551042 A CN201710551042 A CN 201710551042A CN 107385273 A CN107385273 A CN 107385273A
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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
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Abstract
Unleaded environment-friendly yellow brass alloy for requiring and being different from Bi brass, silizin and arsenic yellow copper and preparation method thereof can be met the invention provides a kind of, also without selenium, tellurium, antimony, phosphorus, magnesium, manganese element in the brass alloys.Alloy of the present invention is made up of following composition：58 61.5wt.% Cu ,≤0.25wt.% Pb, 0.5 0.8wt.% Al, ＜ 0.1wt.% Sn, ＜ 0.1wt.% Ni, 0.02 0.15wt.% Fe, 5 12ppm B, remaining is Zn and inevitable impurity.Alloy of the present invention has good combination property in addition to polishing performance, heat crack resistance are excellent, suitable for the water heating bathroom parts of casting.
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
Selenium, tellurium, antimony, phosphorus, magnesium, casting leadless environment-friendly brass alloys and its manufacture method of manganese element.
Background technology
Ledrite contains 1wt.%-4wt.% lead, and because having excellent cutting and processability, and cost is cheap, quilt
It is widely used in the every field such as electric, mechanical, hot-water heating.However, because ledrite can be made during production, use to environment
Into pollution, endanger the developed countries and regions such as human health, the U.S., European Union, Japan and successively formulate lead-free standard and decree, such as
NSF-ANSI61, NSF-ANSI372, AB-1953, RoHS etc..Wherein definition of the American AB -1953 to " unleaded " be Pb contents not
More than 0.25wt%.China GB 18145-2014《Ceramic seal water nozzle》Also provide that the amount of precipitation of lead in drinking water parts should
Less than 5ug/L.
To realize that brass is unleaded, once studied by realizing the cutting ability of brass alloys for lead with selenium, tellurium, antimony,
And improve the combination property of brass alloys by adding appropriate other elements.Add selenium in brass, though tellurium can be effectively improved
Cutting ability, but because selenium, tellurium are expensive, be not easy to add in fusion process, recovery rate is low, does not obtain marketing always and produces
Industry.And antimony has toxicity in itself, when Sb contents are more than 0.02%, product tests stripping quantity of the antimony element in water through NSF
0.6 μ g/L as defined in GB18145-2014 standards will be exceeded, it is impossible to applied to potable water system parts.
Studying the leadless environment-friendly brass for extensively and having obtained market high volume applications at present mainly has three major types, 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 not more than 100 μm) exploitation, then
It is poor to there is alloy flowability, shrinks the problem of tendency is big, and casting fraction defective is high.
Phosphorus, magnesium, manganese are added in some brass improves the properties of brass, but the introducing of these elements is in waste material
Difficulty is brought in recycling.
Therefore, still suffer from demand at present 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.
The content of the invention
For overcome the deficiencies in the prior art, unleaded requirement can be met and different from bismuth Huang it is an object of the present invention to provide one kind
Environment-friendly yellow brass alloy of copper, silizin and 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 side
Method.
The further object of the present invention is to provide a kind of environment-friendly yellow brass alloy of high comprehensive performance and preparation method thereof, this
A little combination properties include can be mass, and cost is low, and mechanical property and casting character are good, and polishing and welding performance are good, resist
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：58-61.5wt.% Cu ,≤
0.25wt.% Pb, 0.5-0.8wt.% Al, ＜ 0.1wt.% Sn, ＜ 0.1wt.% Ni, 0.02-0.15wt.%
Fe, 5-12ppm B, remaining is Zn and inevitable impurity.
Cu content is preferably 59-61wt.% in the brass alloys.
Al content is preferably 0.6-0.8wt% in the brass alloys, more preferably 0.65-0.75wt.%.
Pb content is preferably 0.15-0.25wt.% in the brass alloys, and now machinability is preferable, but in order to reach
Further unleaded demand is it is also preferred that ＜ 0.15wt.%, more preferably ＜ 0.1wt.%.
Sn content is preferably 0.02-0.08wt.% in the brass alloys, more preferably 0.05-0.08wt.%.
Ni content is preferably 0.02-0.08wt.% in the brass alloys, or preferably ＜ 0.02wt.%.
Fe content is preferably 0.03-0.08wt.% in the brass alloys.
B content 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 preferably 350-400N.
The preparation method of above-mentioned brass alloys, comprises 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.%；Add appropriate slag-cleaning agent per stove melting forehearth bottom, then add Ni, copper and iron intermediate alloy, Huang
Copper waste material, cathode copper and slag-cleaning agent are added 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, is heated up after metal is completely melt and drags for slag, then carry out composition detection
And performance detection, add fining agent if necessary, after indices are qualified flame, stand, drag for slag and come out of the stove and pour ingot；Wherein described Huang
At least one of copper waste material and fining agent contain boron.
In above-mentioned preparation method, slag-cleaning agent preferably wherein is not borax.
Because Cu-B intermediate alloys are high-melting-point alloys, 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.
Lead (Pb) of the addition no more than 0.25wt.%, the cutting ability of brass alloys can be improved, crystal grain thinning, improved
Casting character, and the lead tolerance for meeting the parts material in AB1953 on being contacted in potable water system with water is no more than
Scorification output is less than 5 μ g/L regulation in 0.25wt.% regulation, and NSF 61 and GB18145-2014.
The addition of aluminium (Al) element can significantly improve the mobility of alloy, improvement casting character, and Al solution strengthening
Effect, alloy strength can be improved, Al content is preferably controlled in 0.5-0.8wt.%, and Al content is too low, and alloy flowability is improved not
Substantially, the easily loose leak of product, but when Al content is too high, mobility can also decrease.
Necessary element of the iron (Fe) as the present invention, primarily serves the effect of crystal grain thinning, Fe is molten in brass tissue
Solution degree very little, often it is present in rich Fe phases particle in matrix, turns into nucleus so as to crystal grain thinning, so as to improve the mobility of alloy
And casting forming function.When B in alloy be present, both Fe and B are combined, and its thinning effect is more preferably.Fe contents preferably control
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 a part of Metamorphism treatment crystal grain thinning together with Fe, as B ＜ 5ppm, pairing
The thinning effect unobvious of gold, the inventors discovered that it is poor Hard Inclusion, polishability during developing alloy to be often present
Problem, through studying repeatedly, the inventors discovered that because caused by alloy has larger amount of Fe and B simultaneously, to keep preferable
Polishability, Fe and B amount needs to reach certain balance, and as Fe ＞ 0.02wt.%, B content must be controlled in ＜
12ppm just can guarantee that the polishing quality of product.
Addition tin (Sn) element can improve corrosion resistance, improve casting character and cutting ability, reduce gas in casting
Hole and it is loose the defects of, Sn contents of the present invention are preferably controlled in below 0.1wt.%, and then alloy becomes fragile Sn too high levels, casting character
Deteriorate.
Addition nickel (Ni) element can improve alloy strength, toughness and corrosion resistance, can especially strengthen the resistance to stress of brass
Corrosive nature, Ni of the present invention is preferably controlled in below 0.1wt.%, too high, increases cost.
Specifically, brass alloys of the invention compared with prior art, at least have the advantages that：
The brass alloys lead content of the present invention is no more than 0.25wt.%, also without elements such as selenium, tellurium, antimony, both meets
The unleaded decree requirements of AB1953, meet the requirement to metal amount of precipitation in water in NSF61 and GB18145-2014 again.
The problem of alloy of the present invention overcomes Bi brass and is also easy to produce fire check, and welding performance is poor；Overcome silizin
The problem of anti-stress corrosion performance difference；Arsenic yellow copper poor fluidity is overcome, shrinks the problem of tendency is big.
The heat crack resistance of the brass alloys of the present invention is good.
The brass alloys of the present invention coordinate thinning microstructure by Fe and B, while with good casting character with
Good polishing performance.
The brass of the present invention is free of the elements such as P, Mg and Mn, avoids the adverse effect that the elements such as P, Mg and Mn are brought,
It is easy to old material to reclaim.
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 has 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
The good overall characteristic of energy.
Embodiment
With reference to specific embodiment, the present invention is described in further detail.
Embodiment
The present invention is further described in detail with reference to specific embodiment, the embodiment provided is only for illustrating
The present invention, the scope being not intended to be limiting of the invention.
The preparation and constituent analysis of 1 alloy of the present invention of embodiment and comparative alloy
A.Alloy 1-6 of the present invention preparation and constituent analysis
It is prepared as follows alloy 1-6 of the present invention：Brass is weighed by the mass percent of alloying component of the present invention to give up
The content of Cu in old material, cathode copper, Zn, Al, Sn, Ni, Pb and copper and iron intermediate alloy, wherein copper and iron intermediate alloy is 90-
95wt.%；Add appropriate non-borax slag-cleaning agent per stove melting forehearth bottom, then add nickel, copper and iron intermediate alloy, brass waste material,
When brass waste material has melted 1/4 surface add cathode copper, after all materials completely melt after sequentially add Zn, Al, Sn,
Pb, and stir, heated up after metal is completely melt and drag for slag, then carry out the performance detection such as composition detection and polishing,
Add non-CuB alloy refinements agent if necessary, after indices are qualified flame, stand, drag for slag, be warming up to 1050-1100 DEG C and go out
Stove pours ingot.
Table 1 is listed in using the composition of invention alloy 1-6 made from the above method.
B. comparative alloy 1-9 acquisition or preparation and constituent analysis
Comparative alloy 1 is the lead brass alloy ZCuZn40Pb2 of in the market purchase, and its composition is listed in table 1.
Comparative alloy 2-9 is prepared by following universal method, the raw material for determining to use by the element included 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, the content of Cu in copper and iron intermediate alloy are 90wt.%, and the Cu of copper phosphorus intermediate alloy content is 85wt.%；
Si, Ni are placed in power frequency induction furnace bottom, and Cu and Zn raw material 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
Ensure that composition is uniform；Copper and iron, copper phosphorus intermediate alloy, stirring and static 5-10min are added in resulting material；Add among copper boron and close
Gold, 1100~1150 DEG C are warming up to, flame is simultaneously incubated 5-8min；1000~1050 DEG C of insulations are stood, and filter off surface scum；
1050~1100 DEG C of cast coolings of coming out of the stove.
Table 1 is listed in using the composition of comparative alloy 2-9 made from the above method.
The performance detection of 2 alloy of the present invention of embodiment and comparative alloy
The alloy of the present invention and the properties of 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 please refer to table 2.
1. casting character
Band sample：For determining 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 length 200mm band sample mould, after cooling by measuring mould at a temperature of 1050 DEG C
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, determines alloy melt
Trickling length, to weigh alloy flowability.Length of trickling is longer, and the mobility of alloy is better, the contraction tendency phase 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
A diameter of 10mm standard specimen is processed into 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 car are put down, and test the Brinell hardness of each alloy.
3rd, polishing performance
The sample block that sawing 35mm grows on extrusion ingot length direction, takes its cross section.The cross section of sample block is taken by technique
(100#-240#-400#- calicos wheel) is processed by shot blasting.The example cross section after polishing is wiped clean with dry cloth, in luminosity not
Less than being estimated under conditions of 300LX, polishing performance is judged.Hard Inclusion be present, it is poor to show as polishing performance, with "×" table
Show.Without Hard Inclusion, it is excellent to show as polishing performance, is represented with "○".
4. welding performance
Weldment is low pressure casting casting/CuZn37 brass tubes, soldering, flame heating, 350~400 DEG C of temperature.Solderability
Evaluation criterion is that whether weld dimensions cracked and stomata, and flawless, pore-free are qualified, are represented with "○"；It is no
It is then unqualified, represented with "×".
5. heat crack resistance
Alloy melt is poured at a temperature of 1050 DEG C in hot tearing retractometer, by JB/T 4022.2《Alloy casting character determines
The measure 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
Test, after ammonia cure, take out sample, first rinsed well with water, then the washed samples surface in 5% sulfuric acid solution at room temperature
Corrosion product, finally rinsed and dried up with water again, respectively by method described in GB/T 10567.2-2007 and YS/T814-2012
Judge whether ammonia cure result is qualified.
7. underwater gold category separates out
To alloying element of the present invention, stripping quantity measure is performed by NSF/ANSI 61-2007 standards in water, and detector is：
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 to the μ g/L of Pb≤5 μ g/L, Sb≤0.6.
Analysis of experimental results：
Pb the and Sb contents that alloy 1-6 underwater golds category of the present invention separates out meet NSF61 and GB18145-2014 standards will
Ask.Comparative alloy 1 is Winn bronze, wherein the Pb separated out is exceeded, comparative alloy 4 is brass containing Sb, wherein the Sb separated out is exceeded.
Comparative alloy 2-3 is Bi brass, and their welding performance is unqualified, and alloy 1-6 of the present invention welding performance is better than
Comparative alloy 2-3；Alloy 1-6 of the present invention linear shrinkage ratio is less than comparative alloy 2-3, alloy 1-6 of the present invention thermal crack resistant force value
More than comparative alloy 2-3, this illustrates that the thermal crack resistant ability of alloy of the present invention is better than Bi brass.
Comparative alloy 5-6 is silizin, is tested according to YS/T814-2012, comparative alloy 5-6 anti-stress corrosion performance
Unqualified, alloy 1-6 of the present invention anti-stress corrosion performance is better than silizin.
Comparative alloy 7 is arsenic yellow copper, and alloy 1-6 of the present invention linear shrinkage ratio, 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 contents are higher in comparative alloy 8, and B content is more than 12ppm, compared with invention alloy 1-6, polishing performance compared with
Difference.
In comparative alloy 9 Cu contents be higher than the application in Cu contents, in addition to manufacturing cost is higher, comparative alloy 9 it is whole
Body combination property is also not so good as alloy 1-6 of the present invention.
In summary, alloy of the present invention meets the unleaded decree requirements of AB1953, and underwater gold category amount of precipitation meets
The requirement of GB18145-2014 standards, the defects of overcoming Bi brass, silizin, arsenic yellow copper, while have good casting character,
These combination properties 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 the potable water system parts in future will
Progressively expand.
Above-described embodiment is used to explain the present invention, rather than limits the invention, in the spirit and right of the present invention
In claimed scope, to any modifications and changes of the invention made, protection scope of the present invention is both fallen within.
Claims (10)
1. a kind of casting environment-friendly yellow brass alloy, consisting of：58-61.5wt.% Cu ,≤0.25wt.% Pb, 0.5-
0.8wt.% Al, ＜ 0.1wt.% Sn, ＜ 0.1wt.% Ni, 0.02-0.15wt.% Fe, 5-12ppm B, remaining
For Zn and inevitable impurity.
2. brass alloys according to claim 1, it is characterised in that Cu content is 59- in the brass alloys
61wt.%；Al content is 0.6-0.8wt%, more preferably 0.65-0.75wt.%.
3. according to the brass alloys any one of claim 1-2, it is characterised in that Pb content in the brass alloys
For 0.15-0.25wt.%, or it is ＜ 0.15wt.%, is preferably<0.1wt.%.
4. according to the brass alloys any one of claim 1-3, it is characterised in that Sn content in the brass alloys
For 0.02-0.08wt.%, preferably 0.05-0.08wt.%.
5. according to the brass alloys any one of claim 1-4, it is characterised in that Ni content in the brass alloys
For 0.02-0.08wt.%, or it is ＜ 0.02wt.%.
6. according to the brass alloys any one of claim 1-5, it is characterised in that Fe content in the brass alloys
For 0.03-0.08wt.%.
7. according to the brass alloys any one of claim 1-6, it is characterised in that B's for 5- in the brass alloys
10ppm, more preferably 7-9ppm.
8. according to the brass alloys any one of claim 1-7, it is characterised in that the thermal crack resistant power of the brass alloys
It is worth for 245-400N, more preferably 350-400N.
9. the preparation method of the brass alloys any one of claim 1-8, it is characterised in that comprise the following steps：
The mass percent of element and each element according to contained by brass alloys weigh brass waste material, cathode copper, Zn, Al, Sn,
The content of Cu in Ni, Pb and copper and iron intermediate alloy, wherein copper and iron intermediate alloy is 90-95wt.%；
Add appropriate slag-cleaning agent per stove melting forehearth bottom, then add Ni, copper and iron intermediate alloy, brass waste material, treat brass waste material
Cathode copper and slag-cleaning agent are added on surface when having melted 1/4, Zn, Al, Sn, Pb are sequentially added after all materials are melted completely,
And stir, heated up after metal is completely melt and drag for slag, then carried out composition detection and performance detection, add if necessary
Fining agent, after indices are qualified flame, stand, drag for slag and come out of the stove and pour ingot；
At least one of wherein described brass waste material and fining agent contain boron.
10. the preparation method of brass alloys according to claim 9, it is characterised in that slag-cleaning agent therein is not borax, wherein
The fining agent added is 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 |
| EP18828473.1A EP3650563A4 (en) | 2017-07-07 | 2018-07-03 | Environmentally friendly brass alloy for casting and manufacturing method therefor |
| PCT/CN2018/094181 WO2019007309A1 (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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019007309A1 (en) * | 2017-07-07 | 2019-01-10 | 路达(厦门)工业有限公司 | Environmentally friendly brass alloy for casting and manufacturing method therefor |
| CN110923497A (en) * | 2019-10-29 | 2020-03-27 | 福建工程学院 | Intermediate alloy for refining crystalline structure of copper and copper alloy, preparation method and application process thereof |
| CN111101017A (en) * | 2019-12-31 | 2020-05-05 | 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 |
| CN111945031A (en) * | 2017-08-11 | 2020-11-17 | 骊住集团株式会社 | Copper alloy, use of a copper alloy, sanitary fitting and method for producing a sanitary fitting |
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| CN117686291A (en) * | 2022-09-02 | 2024-03-12 | 山东众标企信检测科技有限公司 | Copper and copper alloy spectral analysis standard substance and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019007309A1 (en) * | 2017-07-07 | 2019-01-10 | 路达(厦门)工业有限公司 | Environmentally friendly brass alloy for casting and manufacturing method therefor |
| CN111945031A (en) * | 2017-08-11 | 2020-11-17 | 骊住集团株式会社 | Copper alloy, use of a copper alloy, sanitary fitting and method for producing a sanitary fitting |
| CN110923497A (en) * | 2019-10-29 | 2020-03-27 | 福建工程学院 | Intermediate alloy for refining crystalline structure of copper and copper alloy, preparation method and application process thereof |
| 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 |
| CN111101017A (en) * | 2019-12-31 | 2020-05-05 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3650563A4 (en) | 2021-04-07 |
| EP3650563A1 (en) | 2020-05-13 |
| WO2019007309A1 (en) | 2019-01-10 |
| CN107385273B (en) | 2019-03-01 |
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