CN101812610B - Low-lead and easy-cutting casting brass - Google Patents
Low-lead and easy-cutting casting brass Download PDFInfo
- Publication number
- CN101812610B CN101812610B CN200910044796XA CN200910044796A CN101812610B CN 101812610 B CN101812610 B CN 101812610B CN 200910044796X A CN200910044796X A CN 200910044796XA CN 200910044796 A CN200910044796 A CN 200910044796A CN 101812610 B CN101812610 B CN 101812610B
- Authority
- CN
- China
- Prior art keywords
- brass
- lead
- cutting
- easy
- percent
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Abstract
The invention relates to low-lead and easy-cutting casting brass, which comprises the following components in percent by mass: 56.0 to 68.0 percent of copper, 2.0 to 2.3 percent of manganese, 2.1 to 2.4 percent of antimony, 0.18 to 0.20 percent of lead, 0 to 0.1 percent of silicon, 0.2 to 0.3 percent of aluminum, 0.3 to 0.5 percent of calcium or barium and the balance of zinc, wherein the summation of the zinc, the manganese and the antimony is no more than 4.5 percent, and the total content of impurities is no more than 0.05 percent. The low-lead and easy-cutting casting brass can solve the problem of environmental pollution caused by high content of the lead in lead brass, has excellent casting property, and can be applied to the fields such as electronic devices, water heating and bathrooms, structural parts and the like.
Description
Technical field the present invention is a kind of metallic substance, relates to low-lead and easy-cutting brass.
Background technology lead when leaded brass melt casting is solidified, precipitation in alloy and form disperse and fine plumbous particle, the plumbous molecule that this disperse distributes in the leaded brass has at crystal boundary and intracrystalline.Lead has more crisp and soft characteristics, adds man-hour when leaded brass is cut, and smear metal is peeled off from the workpiece cutting by cutter head, and the plumbous particle of these disperses becomes stress raiser, produces so-called " notched effect ", thereby causes smear metal to be easy in this fracture; And the plumbous particle of these disperses is softer, can make tool bit abrasion reduce to minimum.Because plumbous particulate has at intracrystalline and crystal boundary, when leaded brass during in machining, smear metal runs into plumbous particulate soon and ruptures, and lacks so smear metal is thin.In addition, plumbous particulate fusing point lower (plumbous fusing point only is 327.5 ℃), cutter head does work to cutting workpiece during machining, and energy of deformation, frictional energy are transformed into heat energy, the local moment that cutter head is contacted with smear metal is rapidly heated, be easy near in addition surpass plumbous temperature of fusion.Softening even lead fusing can play the effect of lubricated cutter, can reduce cutting resistance and improve stock-removing efficiency.Therefore, lead plays a part cracked smear metal, reduces bonding and seam and improves cutting speed in the cutting process of brass material, can increase the work-ing life of cutter greatly.
Because plumbous inherent natural disposition, its size, pattern, quantity, characteristic, distribution situation, distributing position in leaded brass not only makes leaded brass have excellent cutting ability, and make leaded brass have advantages such as good castability, cold-forming property, hot workability and self-lubricating, can satisfy the machining requirement of different shape component.Winn bronze once by universally acknowledged be important base mateiral, be widely applied to foundry goods and many fields such as accessory, electronics, automobile and machinofacture thereof of domestic water supply system.
After the leaded brass spare and accessory parts were scrapped, a lot of smallclothes were used as rubbish and abandon, and have only to be recovered utilization on a small quantity.Leaded brass is owing to plumbous existence form therein, and its contained lead enters soil under rainwater and atmospheric long term, thus contaminated soil and water source.When discarded leaded brass was taken as waste incineration, plumbous steam distributed among atmosphere, human body is produced greatly harm, thereby it used the restriction that is subjected to strictness day by day.Lead under the effect of impurity in tap water and organic acid etc. in the copper alloy containing lead is slowly separated out with the ionic form, and existing copper alloy containing lead is difficult to satisfy the requirement of environmental protection act.
Development of new environment-protective free-cutting brass is an international problem, though obtained very big achievement at present, also has a large amount of needs of work to go to finish to improve performance, increase kind, to widen range of application.A large amount of lead-free free-cutting bismuth brass patents has been invented in America and Japan Europe, and a plurality of lead-free free-cutting bismuth brass patents have also been invented by China, as: leadless free-cutting brass alloy material and its manufacture method, 02121991.5; Leadless free-cutting brass alloy, 200310109162.0; Ecological, environmental protective new type leadless easy cutting low antimony bismuth brass alloys and manufacture method thereof, 200510050425.4; Pb-free copper-alloy, 200610005689.2; A kind of unleaded easy-cutting magnesium-bismuth-brass alloys, 200710098481.4.Above-mentioned non-leaded easily-cutting brass has one or more excellent performances at aspects such as cutting ability, cold and hot working performance, mechanical property, anti-stress cracking performance, corrosion resistances, indivedual performances even near the performance of leaded brass.But, compare with leaded brass, on castability, also have bigger gap.In fact, want to develop a kind of novel non-leaded easily-cutting brass that all properties is all complete and leaded brass compares favourably, also impossible at present.The relevant criterion and the statutory regulations of U.S. NSF (reducing to 1.5 μ g/L by 45 μ g/L in the tap water), Japanese JIS, German DIN50930 and European Union: since 2006, the plumbous stripping standard of water channel must be reduced to 0.01mg/L from the 0.05mg/L in past.Under the prerequisite that is no more than plumbous stripping threshold concentration, can contain a certain amount of lead in the brass, as long as its massfraction is no more than 0.2%.Because plumbous have very positive effect to castability, the machinability that improves in the free-cutting brass, in free-cutting brass, add a spot of lead, will be highly profitable to improving its cutting ability and castability.Certainly, only add and be no more than 0.2% lead, no matter the castability of brass still be that machinability is relative with leaded brass all has than gap greatly.This just requires to design a kind of novel low-lead and easy-cutting brass, makes its castability and machinability approach leaded brass.
Summary of the invention
The objective of the invention is to develop a kind of casting low-lead and easy-cutting brass, make plumbous massfraction be no more than 0.2%, performance lead and alloying element are to castability and cutting ability active effect simultaneously.The foundry goods of the brass production of being invented need not to carry out cold working or hot-work, only needs and will promptly finish all manufacturing procedures after the foundry goods direct mechanical machining.It is too high and problem of environment pollution caused can provide a kind of castability good low-lead and easy-cutting brass for fields such as electron device, hot-water heating bathroom, structural parts that the present invention can effectively solve in the leaded brass lead content.From a series of composition, filter out brass composition with good cutting and castability.
The composition quality mark of low-lead and easy-cutting brass: copper (Cu) 56.0%-68.0%, manganese (Mn) 2.0%-2.3%, antimony (Sb) 2.1%-2.4%, plumbous (Pb) 0.18%-0.20%, silicon (Si) 0-0.1%, aluminium (Al) 0.2%-0.3%, calcium (Ca) or barium (Ba) 0.3%-0.5%, surplus is zinc (Zn), and the summation of manganese and antimony is no more than 4.5%, total impurities is no more than 0.05%.
Technical process of the present invention is as follows:
Line frequency furnace, medium-frequency induction furnace or resistance furnace are used in the preparation of low-lead and easy-cutting casting brass of the present invention, and at first with the copper sheet fusing, follow-up order of addition(of ingredients) is: silicon, aluminium, antimony, lead, manganese, calcium or barium add zinc at last.After treating the fusing of all alloying elements, intensification, flame, coming out of the stove pours into swage and sand mold.Obtain machining sample and volution sample, respectively cutting ability, the flowability of beta alloy.All smear metals that machining produced are collected, cross 30 mesh sieves, take by weighing sieve respectively and go up smear metal and undersized smear metal quality, calculate the fines percentage ratio of smear metal.By standard sampling, the Brinell hardness of testing brass respectively, observe the pattern of beating the pit that Brinell hardness stays.
Principle of the present invention is as follows:
In application in practice, because concrete Working environment can not be identical, its requirement to alloy material in fact is different.At concrete requirement, it can only need to consider one or two main performance index to alloy sometimes, and other performance index are as long as satisfy conventional requirement.If only consider one or two salient featuress, consider the over-all properties of alloy with exceeding, just much relatively easy in the alloy designs exploitation.Such as, if do not consider the cold-forming property and the hot workability of free-cutting brass, then can develop the no leaded brass approaching fully with the leaded brass performance.Purpose of the present invention will be developed a kind of casting non-leaded easily-cutting brass exactly, and foundry goods need not to carry out cold working or hot-work, only needs that foundry goods is carried out mechanical cutting processing and promptly finishes all manufacturing procedures.The principal feature of brass of the present invention is exactly to have excellent cutting ability and castability.
Though manganese is an element that dwindles alpha phase zone, its effect is not obvious, and is also little to the influence of brass tissue.Manganese has the solution strengthening effect to brass, and can strengthen the corrosion resistance of brass to seawater, muriate and superheated vapour greatly.Manganese brass has goodish processing characteristics.Add manganese and mainly be in order to improve corrosion resistance of alloy, and utilize the solution strengthening effect of manganese brass.Have viewpoint to think manganese mobile unfavorable to brass, in casting technique, manganese content is unsuitable too high, preferably be controlled at below 0.6%, otherwise more high-load manganese causes alloy rigidity to increase.But find that in research of the present invention manganese is favourable to flowability, its reason is to have added among the present invention a spot of calcium metal or barium.On the one hand, calcium or barium can purify crystal boundary, improve the flowability of brass; On the other hand, calcium or barium can generate and impel and generate the second tiny phase particle, and is very favourable to improving flowability and cutting ability.The reason that the flowability of brass of the present invention improves also interests in the comprehensive action of aluminium, manganese and calcium, barium, silicon, lead.The content of manganese is controlled at 2.0%-2.3% in the brass of the present invention.
The solubleness of antimony in copper sharply reduces along with decrease of temperature, is less than at 0.1% o'clock at its content, will the crisp Cu of formation property
2Sb is net distribution in crystal boundary, and the cold-forming property of brass is descended significantly.At high temperature the solubleness in copper is bigger owing to antimony, thereby solution treatment can improve the cold-forming property that contains merimee's yellow copper.On the other hand, add a spot of rare earth element, can improve Cu
2The reticulated structure of Sb reduces its disadvantageous effect to the brass cold-forming property.Antimony also makes copper alloy produce red brittleness, and too high antimony worsens the hot workability of brass, is unfavorable for hot-work, causes the cost of goods to improve.Brittle Cu
2Though the Sb particle is unfavorable to the processing characteristics of brass, highly beneficial to chip breaking when brass is carried out machining, thereby antimony obviously improves the machining ability of brass.It is generally acknowledged that the addition of antimony in free-cutting brass can not surpass 2%, otherwise the use properties of meeting severe exacerbation brass.But the present invention shows, the addition of antimony surpasses 2%, increased to 2.4% o'clock always, add a spot of calcium, barium at the same time, when improving the free-cutting brass machinability, can also guarantee that its use properties does not descend, antimony content of the present invention is controlled at 2.1%-2.4%, can obviously optimize the effect of the machinability of brass.
Aluminium significantly dwindles alpha phase zone, when aluminium content is high, the γ phase can occur, improves the intensity and the hardness of alloy, but reduces plasticity significantly.Aluminium improves its castability by improving its flowability in brass, but aluminium is unfavorable to the dezincify ability that improves brass.In aluminum brass, the surface ion tendency of aluminium is bigger than zinc, preferentially forms fine and close and firm pellumina can prevent the further oxidation of alloy.The density of aluminium only is 2.7g/cm
3, be typical light metal, and low price, base metal belonged to.Add the cost that aluminium can reduce brass in the brass, improve its market competitiveness.Along with the increase of aluminium content, some performance of brass is when improving, and the other performance then may worsen, so its add-on has the scope of an optimum.Aluminium content of the present invention is controlled at 0.2%-0.3%, can reach the intensity, hardness and the plasticity that make brass, the balance between anti-dezincify ability and castability, the cost.
Silicon is to dwindle the strongest alloying element of alpha phase zone ability, and it can increase brass zinc equivalent and form the γ phase, improves the cutting ability of brass.Silicon can also improve the castability and the welding property of alloy by deoxidation, improves the solidity to corrosion of brass, especially improves its anti-Dezincification corrosion performance.Silicone content is controlled in the 0-0.1% scope in the brass of the present invention.
They have the effect of modifying-refining alloy grain on the one hand select to add calcium and barium, make the intermetallic compound more disperse that distributes even, can also make antimony guarantee that its use properties does not descend in the cutting ability that improves brass.They also have desoxydatoin to melt on the other hand, and its improvement to fluidity of molten is also very obvious, and are highly beneficial to the castability that improves brass.The content of selectivity interpolation element is controlled as follows respectively among the present invention: calcium (Ca) 0.3%-0.5%, barium (Ba) 0.3%-0.5%.The content of calcium or barium further improves again, and the hardness of brass improves, and is unfavorable for the raising of cutting ability and the improvement of flowability is also reached peak value substantially, and the content of calcium or barium all is no more than 0.5%.The plumbous mechanism of action in brass is very clearly, and it both improved significantly to the flowability of brass, also chip breaking was had good effect, so a small amount of lead in the brass is very favourable to castability and the cutting ability that improves brass.
It must be noted that, with regard to the cutting ability influence of a certain element to brass, be clearly separately substantially, no matter is from influencing mechanism or influencing on the rule, the view of relatively generally acknowledging being arranged.But when multiple element added together, we can not go to infer that it influences rule with simple superposition method.Multiple element adds together, owing to may have complicated reaction and resultant, can also dissolve mutually simultaneously, so its influence is very complicated, and a lot of mechanism also it be unclear that.Many times also be in half theory, semiempirical state.So in the exploitation to the multielement non-leaded easily-cutting brass, can only get on to use the trial and error experiment, so just need a large amount of experiments could determine the brass composition of optimizing on theoretical basis.In brass of the present invention, compound particles between the friable metal that the multielement reaction that has a large amount of disperses to distribute in the microtexture generates, as: Cu
3Mn2Al, ε phase, Mn
2Si, β ' reach mutually some other be rich in zirconium, vanadium structure with form the intermetallic compound that it be unclear that mutually.β ' is orderly body-centered crystal structural intermetallic compounds, and is more crisp firmly mutually than β, is favourable to improving cutting ability.
The good fluidity of brass of the present invention has excellent castability, and the microtexture of brass helps chip breaking simultaneously, and its cutting ability is good.
Embodiment
Embodiment 1:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 56.0%, and manganese (Mn) 2.0%, antimony (Sb) 2.1%, plumbous (Pb) 0.18%, aluminium (Al) 0.2%, calcium (Ca) 0.3%, surplus is zinc (Zn), total impurities is no more than 0.05%.After preparing starting material, at first with the copper sheet fusing, follow-up order of addition(of ingredients) is: aluminium, antimony, lead, manganese, calcium add zinc at last.After treating the fusing of all alloying elements, intensification, flame, coming out of the stove pours into swage and sand mold.Obtain machining sample and volution sample, Brinell hardness, cutting ability, the flowability of beta alloy are calculated fines percentage ratio respectively, observe the pit pattern.Found that the brass Brinell hardness of this composition is HB91.2, fines per-cent is 28.5%, and flowability is 61cm, and cutting ability is equivalent to 84% of HPb59-1.The pit morphology observation is found, can only be seen deformation range, knuckle has been difficult for identification, and strain-hardening is not obvious in the hole.
Embodiment 2:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 56.0%, and manganese (Mn) 2.1%, antimony (Sb) 2.2%, plumbous (Pb) 0.18%, aluminium (Al) 0.2%, calcium (Ca) 0.4%, surplus is zinc (Zn), total impurities is no more than 0.05%.After preparing starting material, at first with the copper sheet fusing, follow-up order of addition(of ingredients) is: aluminium, antimony, lead, manganese, calcium add zinc at last.After treating the fusing of all alloying elements, intensification, flame, coming out of the stove pours into swage and sand mold.Obtain machining sample and volution sample, Brinell hardness, cutting ability, the flowability of beta alloy are calculated fines percentage ratio respectively, observe the pit pattern.Found that the brass Brinell hardness of this composition is HB90.6, fines per-cent is 28.9%, and flowability is 63cm, and cutting ability is equivalent to 90% of HPb59-1.The pit morphology observation is found, can only be seen deformation range, knuckle has been difficult for identification, and strain-hardening is not obvious in the hole.
Embodiment 3:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 60.0%, and manganese (Mn) 2.2%, antimony (Sb) 2.3%, plumbous (Pb) 0.2%, aluminium (Al) 0.3%, calcium (Ca) 0.3%, surplus is zinc (Zn), total impurities is no more than 0.05%.After preparing starting material, at first with the copper sheet fusing, follow-up order of addition(of ingredients) is: aluminium, calcium halophosphate activated by antimony andmanganese, lead, calcium add zinc at last.After treating the fusing of all alloying elements, intensification, flame, coming out of the stove pours into swage and sand mold.Obtain machining sample and volution sample, Brinell hardness, cutting ability, the flowability of beta alloy are calculated fines percentage ratio respectively, observe the pit pattern.Found that the brass Brinell hardness of this composition is HB91.4, fines per-cent is 28.2%, and flowability is 69cm, and cutting ability is equivalent to 84% of HPb59-1.The pit morphology observation is found, can only be seen deformation range, knuckle has been difficult for identification, and strain-hardening is not obvious in the hole.
Embodiment 4:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 64.0%, and manganese (Mn) 2.1%, antimony (Sb) 2.2%, plumbous (Pb) 0.18%, aluminium (Al) 0.2%, calcium (Ca) 0.5%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB90.9, and fines per-cent is 28.1%, and flowability is 68cm, and cutting ability is equivalent to 85% of HPb59-1.
Embodiment 5:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 68.0%, and manganese (Mn) 2.0%, antimony (Sb) 2.4%, plumbous (Pb) 0.2%, aluminium (Al) 0.3%, calcium (Ca) 0.3%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB91.4, and fines per-cent is 28.1%, and flowability is 67cm, and cutting ability is equivalent to 86% of HPb59-1.
Embodiment 6:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 60.0%, and manganese (Mn) 2.2%, antimony (Sb) 2.3%, plumbous (Pb) 0.18%, aluminium (Al) 0.3%, calcium (Ca) 0.4%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB90.9, and fines per-cent is 27.9%, and flowability is 67cm, and cutting ability is equivalent to 88% of HPb59-1.
Embodiment 7:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 64.0%, and manganese (Mn) 2.3%, antimony (Sb) 2.2%, plumbous (Pb) 0.2%, aluminium (Al) 0.2%, calcium (Ca) 0.3%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB92.2, and fines per-cent is 27.8%, and flowability is 70cm, and cutting ability is equivalent to 80% of HPb59-1.
Embodiment 8:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 68.0%, and manganese (Mn) 2.1%, antimony (Sb) 2.1%, plumbous (Pb) 0.2%, aluminium (Al) 0.2%, calcium (Ca) 0.3%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB91.4, and fines per-cent is 28.0%, and flowability is 70cm, and cutting ability is equivalent to 81% of HPb59-1.
Embodiment 9:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 56.0%, and manganese (Mn) 2.1%, antimony (Sb) 2.1%, plumbous (Pb) 0.2%, aluminium (Al) 0.3%, barium (Ba) 0.3%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB91.2, and fines per-cent is 28.3%, and flowability is 64cm, and cutting ability is equivalent to 83% of HPb59-1.The pit morphology observation is found, can only be seen deformation range, knuckle has been difficult for identification, and strain-hardening is not obvious in the hole.
Embodiment 10:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 56.0%, and manganese (Mn) 2.2%, antimony (Sb) 2.3%, plumbous (Pb) 0.18%, aluminium (Al) 0.2%, barium (Ba) 0.4%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB90.5, and fines per-cent is 28.8%, and flowability is 63cm, and cutting ability is equivalent to 89% of HPb59-1.The pit morphology observation is found, can only be seen deformation range, knuckle has been difficult for identification, and strain-hardening is not obvious in the hole.
Embodiment 11:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 60.0%, and manganese (Mn) 2.2%, antimony (Sb) 2.3%, plumbous (Pb) 0.2%, aluminium (Al) 0.3%, barium (Ba) 0.3%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB91.2, and fines per-cent is 28.1%, and flowability is 71cm, and cutting ability is equivalent to 84% of HPb59-1.The pit morphology observation is found, can only be seen deformation range, knuckle has been difficult for identification, and strain-hardening is not obvious in the hole.
Embodiment 12:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 64.0%, and manganese (Mn) 2.1%, antimony (Sb) 2.2%, plumbous (Pb) 0.18%, aluminium (Al) 0.2%, barium (Ba) 0.5%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB91.9, and fines per-cent is 27.7%, and flowability is 67cm, and cutting ability is equivalent to 83% of HPb59-1.The pit morphology observation is found, can only be seen deformation range, knuckle has been difficult for identification, and strain-hardening is not obvious in the hole.
Embodiment 13:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 68.0%, and manganese (Mn) 2.0%, antimony (Sb) 2.3%, plumbous (Pb) 0.2%, aluminium (Al) 0.3%, barium (Ba) 0.3%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB91.6, and fines per-cent is 28.3%, and flowability is 65cm, and cutting ability is equivalent to 83% of HPb59-1.The pit morphology observation is found, can only be seen deformation range, knuckle has been difficult for identification, and strain-hardening is not obvious in the hole.
Embodiment 14:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 60.0%, and manganese (Mn) 2.1%, antimony (Sb) 2.4%, plumbous (Pb) 0.18%, aluminium (Al) 0.3%, barium (Ba) 0.4%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB90.6, and fines per-cent is 28.6%, and flowability is 67cm, and cutting ability is equivalent to 88% of HPb59-1.The pit morphology observation is found, can only be seen deformation range, knuckle has been difficult for identification, and strain-hardening is not obvious in the hole.
Embodiment 15:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 64.0%, and manganese (Mn) 2.3%, antimony (Sb) 2.2%, plumbous (Pb) 0.2%, aluminium (Al) 0.2%, barium (Ba) 0.3%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB91.0, and fines per-cent is 28.7%, and flowability is 62cm, and cutting ability is equivalent to 88% of HPb59-1.
Embodiment 16:
The composition quality mark of low-lead and easy-cutting brass is: copper (Cu) 68.0%, and manganese (Mn) 2.2%, antimony (Sb) 2.3%, plumbous (Pb) 0.2%, aluminium (Al) 0.3%, barium (Ba) 0.5%, surplus is zinc (Zn), total impurities is no more than 0.05%.The brass Brinell hardness of this composition is HB91.1, and fines per-cent is 28.4%, and flowability is 67cm, and cutting ability is equivalent to 85% of HPb59-1.
Claims (2)
1. low-lead and easy-cutting casting brass, it is characterized in that: the massfraction of each composition is copper 56.0%-68.0%, manganese 2.0%-2.3%, antimony 2.1%-2.4%, plumbous 0.18%-0.20%, aluminium 0.2%-0.3%, calcium or barium 0.3%-0.5%, surplus is a zinc, and the summation of manganese and antimony is no more than 4.5%, total impurities is no more than 0.05%.
2. low-lead and easy-cutting casting brass as claimed in claim 1 is characterized in that: the massfraction of described manganese is 2.1%-2.3%, and the massfraction of antimony is 2.2%-2.4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910044796XA CN101812610B (en) | 2009-11-23 | 2009-11-23 | Low-lead and easy-cutting casting brass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910044796XA CN101812610B (en) | 2009-11-23 | 2009-11-23 | Low-lead and easy-cutting casting brass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101812610A CN101812610A (en) | 2010-08-25 |
| CN101812610B true CN101812610B (en) | 2011-08-31 |
Family
ID=42619978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910044796XA Expired - Fee Related CN101812610B (en) | 2009-11-23 | 2009-11-23 | Low-lead and easy-cutting casting brass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101812610B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477496B (en) * | 2010-11-27 | 2015-06-10 | 湖南特力新材料有限公司 | Method for preparing unleaded free-cutting brass |
| KR101340487B1 (en) | 2011-09-30 | 2013-12-12 | 주식회사 풍산 | Leadless Free Cutting Copper Alloy and Process of Production Same |
| CN105264101B (en) * | 2013-06-05 | 2017-11-14 | 三越金属株式会社 | Acid bronze alloy |
| CN106636732A (en) * | 2016-12-12 | 2017-05-10 | 余姚市庆达机械有限公司 | High-plasticity brass alloy material and preparation method thereof |
-
2009
- 2009-11-23 CN CN200910044796XA patent/CN101812610B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101812610A (en) | 2010-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101440445B (en) | Leadless free-cutting aluminum yellow brass alloy and manufacturing method thereof | |
| EP2952596B1 (en) | Lead-free easy-to-cut corrosion-resistant brass alloy with good thermoforming performance | |
| CN1333094C (en) | Environmental protection, healthy new type leadless easy cutting corrosion resistant low boron calcium brass alloy | |
| CN101619404B (en) | Easy-cutting lead-free brass alloy for forging and preparation method thereof | |
| CN1329539C (en) | Ecological environmental-protection lead-free free-cutting low antimony bismuth brass alloy and its manufacturing method | |
| CN1993486A (en) | Copper alloy casting and casting method thereof | |
| JP2007517981A (en) | Lead-free free-cutting brass alloy containing antimony | |
| CN101565784B (en) | Lead-free free-cutting calcium-yellow brass alloy | |
| CN101445885B (en) | Easily-cut silicon brass alloy and preparation method thereof | |
| CN102634688B (en) | Leadless free-cutting copper alloy and preparation method | |
| CN100352597C (en) | Cadmium-free silver solder comprising Ga, Im and Ce | |
| CN101701304B (en) | Manufacturing method of low-cost corrosion-resistant lead-free easy-cutting brass | |
| CN101812610B (en) | Low-lead and easy-cutting casting brass | |
| CN105624463A (en) | Lead-free free-cutting brass alloy and preparation method thereof | |
| WO2007037426A1 (en) | Free-cutting aluminum alloy extrudate with excellent brittle resistance at high temperature | |
| JP4620963B2 (en) | Brass, manufacturing method thereof, and parts using the same | |
| CN101307403A (en) | High strength easy-to-cut aluminum alloy | |
| CN101665885B (en) | Casting non-leaded easily-cutting brass | |
| CN102477496B (en) | Method for preparing unleaded free-cutting brass | |
| CN105779811B (en) | A kind of environment-friendly yellow brass alloy that processability is excellent and its manufacturing method | |
| CN101158000A (en) | Leadless easy-cutting aluminum alloy | |
| CN101805841B (en) | Rare earth oxide unleaded free-cutting brass and preparation method thereof | |
| CN102002611B (en) | Free-cutting white brass alloy and manufacture method thereof | |
| CN110747369A (en) | Lead-free-cutting silicon-magnesium-calcium brass alloy and preparation method thereof | |
| CN101709406B (en) | Manganese dioxide unleaded cutting brass and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20111123 |